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CONTENTS.

INTRODUCTION . . e e . ° ° . . ° ry . ° e . e CY) . . . ° . . e e

List or PLhates . . . ew eet ke ee ee et ee tk CO

ERRATA ET CORRIGENDA . «© 6 2 6 6 6 oe ee ee et lk wt lt

CHstRIDEB . we ee ee ee ee eee ee ee ew we ww) 1, 488

Muscipe 2. ww ee ee ee ee ee ee we ew ww 2, 483

Muscip# CaLypvERE . 1. we ee we ww ee ee eee ee we) 8, 488

PHASINE «1 ee ee ee ee ww ee ee we ee ee 8, 488

GYMNOSOMINE . 2. 6 6 6 1 ew ew we ee le lt le lt lt lw lt ke ww) 4, 445

OcYPTERINE . 2. 6 6 6 8 8 ee ee we we we we ww el we) (8, 449

PHANINE . 2. 6 2 ew ew ee ew ew we ee tw le tt lw ll 5, 455

TACHININE . 2. 2. 6 2 ee te te ew ee ee ee te te 5, 41, 459

DEXINE . 2. 6 6 ee ew we ee ee we ee ee ew ee we ee CLI

SARCOPHAGINE .« «6 6 6 8 ee ee ee ew we ee et ew we ww GS

Muscin® 2. 1. 1 ew ew we ee ee ee ew ee ee ee ew ww 291

ANTHOMYINE 2 6 6 6 ew ew ew ww ew we eee te ww we BIR

Muscip# ACALYPTERE . . 6 6 ee ew ee eee ee we ee wwe 848

CoRDYLURINE . 2. 6 6 ew we eee ee ee eee ew ee ew «848

HELOMYZINE . 1 ee ee ee ee ee ee ee ee we we ww (HL

SCIOMYZINE . 6 6 2 © © 6 e 6 ee ee ew eee ww ww we: «(BD

PsmnIne 6 1 we ww ee ww we we ee we ew ew ww we «(860

TANYPEZINE . 6 6. 6 ee ew ew ee te ew ee ee ew ew «(BGR

CALOBATINE . 6. 06 6 8 we ee ee ee ew eee ee ee) «868

ORTALINE. . 6 6 6 8 ee we ee ee ee ww ee ww ee te BF

TRYPETINE 2. 6 6 1 ee ee ew ee ew ew ew we ew ew ww AOI

PuripaARA.—HIpPpoposcIDE . . . ww ww ww lw tw tt et ew ge we ARI

SuppLeEMENT TO THE Muscipm CatypreR® . . 2. we ew ew ew ew ww ww ww «BS

List of Species of “Muscip# Catyrrerm”’ and “ Muscipm Acatyprer%”’ described by

other Authors since the commencement of the publication of this Volume, in 1888, and.

not noticed by Vander Wulp . .......~. oe oe

List of Genera characterized by other Authors for Species described i in this Volume ~ « . 488

PLATES.

INTRODUCTION. |

Tus Volume includes the enumeration of the Families Mistride, Muscide, and

Hippoboscide, the whole of which has been contributed by Van der Wulp, most of the

material having been collected by Mr. and Mrs. H. H. Smith, in Mexico, in 1888-89.

Unfortunately, the author did not live long enough to complete his task, the

Agromyzine, Borborine, Chloropsine, Drosophiline, Ephydrine, Geomyzine, and

Sapromyzine, of the ‘“‘ Muscide Acalyptere,” the Families Phoride and Nycteribiidee

(the last-mentioned being unrepresented in our collection), and the Aphaniptera,

still remaining undone at the time of his death, on November 27th, 1899. The Group »

Trypetine, of the “ Muscide Acalyptere,” was then in course of publication, and the

prcoof-sheets were passed by him shortly before his decease. As we have not found an

Entomologist willing to work out the remainder, it has been considered advisable to

close the Volume as it stands, the MSS. of the Hippoboscide and of the Supplement to

the “ Muscide Calyptere,” with the accompanying drawings, having been in our hands

for three years, and brief diagnoses of the new species of Muscide published in the

‘Tijdschrift voor Entomologie’ for 1892, pp. 183-195.

At the end of the Volume is appended a list of the species described since 1888 by

other authors from Mexico or Central America which have not been noticed by Van

der Wulp, as well as a list of the various new genera that have been based upon species

originally described in this work. As regards the numerous “ Muscide Calyptere”’

named by Dr. Giglio-Tos, some of them will certainly prove to be synonymous with

others previously dealt with by Van der Wulp. Altogether, 1095 species are

enumerated, 585 being described as new, with forty new genera.

The thirteen coloured Plates have all been prepared by Mr. Wilson, of Cambridge,

from drawings made by the author, who also drew the figures of the Trypetine

reproduced in the text (pp. 424-428).

The Index to the three Volumes of this subject will be inserted at the end of

Vol. III., when completed.

Ep.

May 1903.

LIST OF PLATES:

Plate. Fig.| Page. Plate. Fig Page

' Echinomyia dispar (head) .......... If. 14a 34

Muscrpa: Carrerera. Trichophora vaana .. ) teen ees II. 15 | 36, 475

Trichopoda squamipes, ¢ .......... XIII. 7 436 trisetosa, Qo ow... eee ee eee II. 16 | 36,476

Homogenia latipennis, d .......... XIII. 8 438 | Gymnomma nitidiventris, 9 ........ Il. 17 38

Acaulona costata ............00.. IIT. 1] 4,439 || Nemocheta dissimilis, ¢ .......... Il. 18 | 39,478

Hyalomyia munda, Sg ............ XITT. 9 441 || Gonia mexicana, Sd ...........05. II. 19 | 40,479

umbrosa, 9 ........ ee cece ee XITI. 10 444 > QD cece cee ee cece eens II. 20 | 40, 479

Ocyptera signatipennis, ¢ ........ XIII. 11 450 || Distichona varia .............00: Til. 2 | 44, 480

Beskia cornuta .............2.0.. XIII. 12 451 || Cnephalia onusta, 9 ........ 0005. Il. 4 46

Xanthomelana articulata, ¢ (head)..| XIII. 13 452 Obesula, QP... eee eee eee ees Il. 3 46

gracilenta, ¢ ...........0-- XIII. 14 454 || Nemoreea forreri ...........0000- II. 21 49

ANCEPS, J wee ec ee eee eee ee XIII. 14 455 || Mystacella fuscicostalis, ¢ ........ III. 5 oT

Ancylogaster armata, d .......... XII. 16 456 || Meigenia albidula, 9 ............ III. 6 59

Clinogaster notabilis, ¢ .......... XIII. 17 457 || Exorista elongata, ¢............6. Il. 8 65

Penthosia satanica................ XIII. 18 458 tricolor ....... eee eee eee Ili. 9 67

Dejeania pallipes ................ I. 1 8 | ——— latimana, @ (anterior tarsus) .. III. 10 67

atrata, S wc. eee eee cece es I. 2 8 flavirostris ...........0000- Il. 7 69

rutilioides ...........000000. I. 3 | 9,459 | Phorocera nigrita, 9.............. IIL. 11 77

corpulenta...............04. I. 4 | 9,459 || Brachycoma foveata .............. Iii. 12 93

plumitarsis, ¢ (abdomen &c.) .. I. 5 | 10,459 || Plagia americana (wing) .......-.. TT. 19 102

Hystricia albiceps, ¢ ............ I. 6 12 || Masicera picta .............0000e Iil. 13 108

ambigua ........... cee ee I. 7 | 13,461 || Metopia perpendicularis, 2 (head &c.) Tit. 18 115

pollinosa oc... eee eee eee I. 8 | 14,461 | Baumhaueria discrepans, 2 (wing) .. Itt. 17 115

T0) 0) I. 9 | 15,461 |) Prospherysa * emulans ............ IIT. 14 117

velutina, So... cece cece eee I. 10 15 minuta, Qo... eee eee eee ITI. 16 123

amcena, Qe... ee ee ee ee eee I. 1l | 16, 461 parvipalpis (head &.) ........ III. 15 124

MICANS 1... cece cece eee I. 12 | 16,461 || Lasiona multisetosa, g ............ III. 20 128

dorsalis, So... eee eee eee I. 13 | 17,461 || Macquartia setiventris, ¢ .......... IIT. 21 129

Saundersia ochripes .............. I. 14 19 || Labidigaster furcata, 2............ Ill, 22 181

laticornis, S ...... eee ee eee I. 15 20 || Myobia flavicornis ................ IV. 1 133

macula ........ cece cece eee I. 16 21 diadema .............2000e IV. 2 137

albomaculata................ I. 17 | 21,464 |) Polygaster egregia, Q ............ IV. 3 139

rufopilosa ............0ee0e I. 18 | 22,464 || Argyrophylax albincisa, @ ........ XIII. 19 485

testacea...... ce eee e eee eee II. 1 | 24,465 || Hypostena blandita .............. IV. 4 142

CANA 2... eee ee ee ee eee Il. 2 25 pilosa, J (Wing) ............ IV. 7 144

—— bipartita .................. II. 3 | 25, 465 melaleuca, ¢ (wing) ........ IV. 6 145

truneaticornis, 9 ............ II. 4 26 quadristriata, Gd ...... eee eee IV. 5 146

Jurinia dichroma ..............4. II. 5 | 27,467 flavocalyptrata, 2 (wing) IV. 8 147

badiiventris, ¢ .............. II. 6 28 || Degeeria nigrocostalis, g (wing) .... IV. 10 151

adusta ..... eee eee eee II, 7 | 28, 467 COMPYESSA .. 2... eee eee IV. 9 153

Belvosia bifasciata ................ II. 8 | 30,469 || Phasiopteryx ochraceus, ¢ (Neoptera } Iv rel 166

leucophrys .............0.. Il. 9 | 30, 469 TUfa) Looe cece eee eee cee eee ° 211.

Echinomyia robusta (head) ........ II. 10a] 32,471 » Q (Neoptera rufa) | ty 12 486°

flaviventris ................ II. 11 32 (Wing &.) ... eee ee ee ee j °

analis (head) .............. II. 12a} 33,473 || Cenosoma signiferum, ¢ .......... IV. 13 167

—— piliventris, g (head) ........ II. 18a| 34,474 || Telothyria cupreiventris, @ ........ IV. 14 182

* The generic name is incorrectly written Phospherysa on the Plate.

vil LIST OF PLATES.

| Plate Fig Page. Plate Fig

Anisia fulvipennis ........-...005. IV. 15 190 | Clinopera inuber, J ..........000- VII. 24

Spheerina nitidula, Q ..........0. IV, 16 205 | -polystigma, Goo... cee eee eee VIL. 25

Rhinophora laevigata, Q .......... IV. 17 205 | Hyetodesia rubella, Q ............ VIIT. 1

(lista musexetormis ..........005. IV. 18 207 | Mydeea pansa...... 0... ee ee eee VIII. 2

Myothyria majorina, Sd ............ IV. 19 | 209 obscura, «ow... ee. eee ee VIII. 3

Prosena lacertosa ........ beens V. L| 215 | Spilogaster trigonata, d .......... VIII. 4

Valida we... eee eee eee Vv. 2 215 copiosa, Oo... eee ee ee eee VIII. 5

Hystrichodexia pseudohystricia...... V. 3) 219 signatipennis, ¢ ............ VIII. 6

formidabilis ................ Vv. 4 | 220 | Limnophora fumipennis, ¢ ........ VIII. 7

Scotiptera melaleuca .............. ! V. oe 224 | Leucomelina nica, g ........ 0.00 Vill. 8

_Rhynchodexia striata, ¢ ........66. V. 6 234 garrula, GS... eee ee ee VIII. 9

planifrons, ¢ (head).......... Vy. 7 234 | Trichophthicus crenatus, ¢ ........ VIII. 10

Tromodesia hemorrhoidalis ........) Vv. 8 238 || Hydrophoria collaris, ¢ .......... VII. 11

Megaparia venosa, 9 .............. V. 9 240 | - transversalis, 6) .........2.4. VIII. 12

Microchetina cinerea ............ V. 10 241 || Pogonomyia aterrima, ¢ .......... VIIl. 13

Camarona xanthogastra, ¢ ........ Vv. 11 241 | Anthomyia elongata, d...........0. VIII. 14

Acronacantha nubilipennis, Q ...... Vv. 12 ' 243 || Hylemyia tenuirostris, @ .......... Vil. 15

Dexiosoma vibrissatum, ¢ ........ V. 13 244 | Charadrella macrosoma, ¢ ........ VIII. 16

Macrometopa calogaster .......... Vv. 14 245 | Coenosia macrocera, ¢ .......2.00. VIII. 17 jee

Stenodexia albicincta, ¢ .......... Vv. 15 246 | Schoenomyza pulicaria, J .......... VIII. 18 346 |

Cholomyia inwquipes .............. VI. 1,2 247 To

Melaleuca spectabilis, @ .......... VI. 3 248

Euantha dives .........:..00005. VI. 4 249 M 4

Leptoda gracilis .................. VI. 5 250 OSCID A ACALYPTERS. ce

Uramyia producta ..............4. VI. 6 25L | Cordylura brevicornis, dg (head) .... IX. 1 349 |)

Cordyligaster minuscula .......... VI. 7 252 rufina, dow... eee eee eee IX. 2 349 |

Cheetona longiseta ................ VI. 8 253 || Helomyza iniens, d ............ a “IX. 3 352 |,

Thelairodes vittigera .............. VI. 9 254 punctulata (wing)..........4. TX. |] 4 352 |

pallida, Q .. 02... eee eee, VI. 10 255 || —— distigma (wing) .........-.. IX. 5 352 -

Xanthodexia sericea .............. VI. 11 256 polystigma, @ (wing) ........ IX. 6 353

Calodexia majuscula, S$ .......... Vi. 12 257 | Sciomyza infuscata, Q ........0... IX. 7 355 |

Rhombothyria flavicosta .......... VI. 13 259 || —-- nana (Wing) ............0-0- IX. 8 355

Pseudomorinia pictipennis, ¢ ...... | OVE 14 260 || strigata (wing) ........ eee IX. 9 355 |

Comyops nigripennis, ¢ .......... VI. 15 262 | squalens (head).............. IX. 10 356 |

Paramintho modulata, ¢ .......... VIL. 1 266 | Tetanocera straminata, fg .......... IX. 11 357 |.

Sarcophaga villipes .............. VIL. 2 269 pictipes (wing &&) .......... IX. 12 357 |

rufitibia, ¢ (leg) ........... VI, 3 270 | -—— acuticornis, g (head) ........ IX. 13 358 |

vagabunda (leg) ............ VIL, 4 270 | Sepedon nubilipennis, ¢ .......... TX. 14 360 |

acanthoptera (wing).......... VII. 5 271 | Tanypeza rutila, d ........ ele. IX. 15 362 | |

——— plumigera......... eee eee ee VIT. . 6 273 | Nerius flavifrons, 6 .............. IX. 16 364

diversinervis (wing) .......... VIL. 7 274 || Micropeza stigmatica, ¢ .......... | IX. 17 366 |.

preevolans ........ eee eee VII, 8 275 | Calobata rubella, Q (wing) ........ IX. 18 368

debilis .............0.00000. VI. 9 279 | diversa, So... ee eee eee eee — IX. 19 369 |

triplasia .. 6... 2... eee, | «VOL. 10 253 || —— manifesta, 9 (wing).......... Ix. 20 370 |

Onesia lucilioides, f .............. | WIL. 11 288 || -—— plectilis, 9 (wing) .......... IX. 21 370 |

Sarcophagula canuta ..............' WIL. 12 289 russula, Ge... ee. ee eee eee IX. 22 370 |

Tyreomma museinum, 9 .......... VIl. 13 293 bracteata, 9 (wing).......... IX. 23 871.) .

Calliphora semiatra (head) ........ VIl. 14 295 grata (Wing) .......... 0.000. IX. 24 371}

melanaria, ¢ .........-.... VII. 15 295 latifascia, G2... eee ee eee IX, 25 372 |

Chloroprocta semiviridis, ¢ ........ Vil. 16 296 || —— lunulata (wing).... 0.0.0.0... IX. 26 372.|

Graphomyia mexicana ............ VIL. 7 300 annulata, So .... ee ee eee eee IX, 27 373 |

Mesembrinella bicolor, 2 .......... VII. 18 301 ichneumonea, S .......2.00. IX. 28 373, (07

eneiventris ................ VII. 19 301 || ——- munda, ¢ (wing) ............ TX, 29 374]

Morellia sarcophagina, ¢ .......... VII. 20 302 callichroma, g ............4. IX, 30 875.

Hemichlora vittigera, Q .......... VII. Z1 304 | Cardiacephala myrmex, ¢.......... IX, 31 376

Muscina linea, ¢ ................ VII. 22 304 , 2 (abdomen) ......... - IX. 32 376

Clinopera hieroglyphica, @ ........ VII. 23 307 |, Pyrgota lugens, g...... eee ee as xX. |. il 378.|

LIST OF PLATES.

Plate Fig.; Page. | Plate. Fig Page.

Toxotrypana curvicauda*, 9 ...... X. 2 379 | | Anastr epha fraterculus (wing) ...... XI. 2] 404

Rhopalomera sp. ......--......00- X. 3 379 | tripunctata (wing) .......... XI. 22 405

Rhinotora sp., ¢ (head) .......... Xx. 4 380 | Plagiotoma obliqua (wing) ........ XI. 23 405

Stictomyia longicornis, 9 .......... X. 5) 380 -Spilographa striata, Q (wing) ...... XI. 24 406

Stenopterina mexicana (wing) ...... X. 6 380 |, obfuscata, ¢ (wing).......... AGE 25 406

alligata, 2 (wing)............ X. wi 381 | —— latifrons, g (wing) .......... XI. | 26 407

Rivellia occulta (wing) ............ X. 8 382 rufata (wing) re XT. 27 407

micans, ¢ (wing)............ X. 9 382 concolor (Wing).............. XI. | 28 408

—— submetallica, § (wing)........ X. 10 382 | Cdaspis atra (wing) ...........4.. XE. | 29 408

conjuncta (wing) ............ X. 11 383 | Rhagoletis striatella, 9 (wing)...... XI. 330 408

connecta, d (wing) .......... x. 12 383 | Polionota mucida, d (wing)........ XII, ol 410

—— flexuosa, 5 (wing) .......... X. 13 383 radians, 9 (wing &) ........ XII | 2 410

—— pilosula, 9 (wing) .......... XxX. 14 384 | Aciura insecta (wing) ............ XII | U8 410

longicornis (wing)............ X. 15 384 | Polymorphomyia pilosula (wing) ... XIT + 411

Mischogaster nitidipennis, ¢ ...... X. 16 3x5 || Blepharoneura fulvicollis (wing) . XIL. a 411

Richardia elegans ................ Xx. 17 386 || --— femoralis (wing) ............ XIL 6 412

concinna (Wing) ............ X. 18 387 | —— quadristriata, J (wing) ...... XII 7 413

Paneryma elongata .............. XN. 19 388 | biseriata, 9 (wing) .......... XIT ) 433

Cyrtometopa cinctella ............ X. 20 389 | Eutreta sparsa (wing) ............ XII 9 413

Stenomacra guerini (wing) ........ X. 21 389 patagiata (wing) ............ XI. 10 414

Automola atomaria (wing) ........ X. 22 390 | Acroteenia tarsata, ¢ (wing &e.) . XII. IL 4i4

Amphicnephes stellatus (wing)...... X. 23 390 apiata (Wing) .......... eee, XII. 12 413

Tetanops vittifrons .............. X. 24 391 incisa (Wing)..........00005. XII. 18 415

rufifrons, 2 (head) .......... X. 25 391 || Baryplegma gilva, 9 (Wing)........ XII. | 14 416

Anacampta latiuscula, d (wing) . X. 26 392 | Ensina humilis (wing) ............ XIT. =| 15 437

Ostracoceelia mirabilis, ¢ (wing)... X. 27 39% peregrina (wing) ............ XIl. | 16 417

» @ (Wing) ............ AG 28 392 luculenta, ¢ (wing).......... XIl, | 17 41?

Xanthacrona bipustulata, 2 ........ X. 29 393 | conspersa, 5 (Wing).......... XII, 18 AIT

Pterocalla fenestrata (wing) ........ X. 30 394 | —— despecta, 2 (wing) .......... XII. | 19 418

quadrata, 2 (wing) .......... XI. 1 394 |, —— mediana, df (wing) .......... XII. ; 20 418

ocellata, d (wing) .......... XI. 2 395 guttularis, 2 (Wing)....-..... XII. | 21 4138

tarsata, ¢ (wing)............ XI. 3 395 || Tephritis finalis (wing)............ XII ; 22 419

— , @ (wing) ............ XI. 4 395 staminea, d (Wing) ......... XII. | 28 419

—— costalis, ¢ (wing)............ XI. 5 396 || —— subradiata, d (wing) ........ XII. 24 420

, @ (wing) ............ XI. 6 396 || —— cancellata (wing) ............ XII | 25 420

Euxesta laticeps, 9 (wing &c.)...... XI. 7 307 | —— fibulata (wing) .............. XI | 26 42

nigricans, ¢ (Wing).......... XT, 8 397 || —— obsoleta, 9 (wing) .......... XI. | 27 421

latifasciata, g (wing) ........ XI. 9 397 | —— semifusea, ¢ (wing).......... XII. =, 228 422

fascipennis (wing) .......... XI. 10 398 || —-— intricata, 2 (wing) .......... XII. | 29 422

major, ¢ (wing) ............ XI. 11 398 | Carphotricha culta (wing).......... XII. | 330 422

alternans (wing) ............ XI. 12 399

stigmatias (wing &.) ........ XI. 13 399

conserta, ¢ (wing) .......... XT. | 14 399 Hirroposcip. |

Hexacheta eximia (wing).......... XI. 15 402 || Olfersia vulturis (head &.) ........ XML. . 1 429

amabilis (wing).............. . XO. 16 403 | coriacea (head &c.) .......... XII 2 430

socialis (wing) ...........66. XI. AT 403 || -—— angustifrons (head &.) ...... XIll. | 3 430

pulchella, 9 (wing) .......... XI. 18 | 403, Ornithomyia avicularia (wing) ...... XII. | 4 431

rupta, 9 (Wing) ............ XI. 19 404 robusta .......... 08s eee eee XI. | 5 431

splendida, ¢ (wing).......... XI. | 20 404 pilosula (head &c.) .......... XIII | 6 432

| |

* The specific name is incorrectly

written curvicanda on the Plate.

BIOL. CENTR.-AMER., Dipt., Vol. IT., May 1905.

ERRATA ET CORRIGENDA.

Page Line

38 16°

39 16 |

40 1

G7 40) for hind tarsi read hind tibiw.

for Tab. V. read Tab. II.

347 3] for sevens read avens.

ue 5

3g 4

BIOLOGIA CENTRALI-AMERICANA.

ZOOLOGIA.

Class INSECTA.

Order DIPTERA.

Fam, @STRIDA*.

CUTEREBRA.

Cuterebra, Clark, Essay on the Bots of Horses &c. p. 70 (1815). :

Cutirebra, as amended by Agassiz.

Trypoderma, Wiedemann, Aussereur. zweifl. Ins. i. p. 256 (1830).

1. Cuterebra americana.

Musca americana, Fabr. Syst. Ent. p. 774. 6; Ent. Syst. iv. p. 815. 4°; Syst. Antl. p. 288. 21.

Trypoderma americana, Wiedem. Aussereur. zweifl. Ins. ii. p. 258. 3”.

Cuterebra americana, Macq. Dipt. Exot. ii. 3, p. 23.5°; Brauer, Monogr. Cistr. p. 242. 11, t. 4.

£.2, & t. 6. f. 74; Walk. List Dipt. Brit. Mus. iii. p. 683 °. CL

Cuterebra cauterium, Clark, Essay on the Bots &c. p. 70, t. 2. f. 28°. ( [aver if

Cuterebra terrisona, Walk. List Dipt. Brit. Mus. iii. p. 6857. = aug

Hab. Norra America 2246, Nova Scotia 5, United States. —Mexico 1, Northern Sonora

(Morrison), Zacatecas (Hoge); Guatemaa ?.—ANTILLEs |. |

It is on the authority of Prof Brauer that I refer C. terrisona, Walk, to this species. — ©© 2*6= 7°"

is on the authority of Prof. Brauer * that 1 reter ©. verrisona, Walk., to tis species. Le a Aint’ feces

2. Cuterebra emasculator. " CuTberhrs aid UF

Cuterebra emasculator, Fitch, Noxious Insects of N. York, Reports 3, 4, and 5, Suppl. p.160, aus n. he Ny,

§ 210’; Brauer, Monogr. Mistr. p. 232. 2’. Werte.

Hab. Nortu America}, New York 2, Arkansas ?.—Muexico, Northern Sonora (Mor-

rison), Presidio (Forrer).

Two males from Presidio were bred from larve found in the neck of a Squirrel

(Sciurus sp.); the identification of these has been confirmed by Prof. Brauer. The

four specimens (a male and three females) from Sonora I refer with some doubt to this

species, on account of the hairs and pollen being almost entirely rubbed off.

According to Brauer (J. ¢. p. 230.1) C. scutellaris, Loew, is probably the same species.

* By F. M. van per WuULP.

BIOL. CENTR.-AMER., Dipt., Vol. II., April 1888. b

DIPTERA.

8. Cuterebra analis.

Cuterebra analis, Macq. Dipt. Exot. ii. 3, p. 22, t. 2. f.5°; Brauer, Monogr. Mstr. p. 237. 57.

Hab. Mexico?; Costa Rica; Panama, Volcan de Chiriqui 3000 feet (Champion).—

Braziu}.

A Chiriqui specimen in beautiful condition has been named as above by Prof. Brauer.

4, Cuterebra approximata,

Cuterebra approximata, Seth; in Lord’s Naturalist in Vancouver’s Island, ii. p. 338°.

Hab. NortaH America, Vancouver’s Island}.—Mexico, Pinos Altos in Chihuahua

(Buchan-Hepburn); GuareMaua, San Gerénimo (Champion).

Two specimens: Prof. Brauer has seen one of these and believes it to be this little-

known species.

One other species of C&stride is recorded from Mexico :—

Cuterebra atrox, Clark, Essay on the Bots &c., Addenda, p. 1 (1848); Brauer,

Monogr. CEstr. p. 241. 9.—Mexico.

Fam. MUSCIDA*.

This family is by far the most extensive among the Diptera, and requires therefore,

more than any other, to be divided into a certain number of subfamilies or groups.

Such a division, however, presents great difficulties. Macquart separated the Muscide

into two great sections, ‘Muscide Calyptere’ and ‘ Muscide Acalyptere,’ which he

shortly indicated (Dipt. Exot. ii. p. 26) by the words: (1) tegule present; (2) tegule

absent or rudimentary. However we define these terms, we ought not to imagine that

they will form a sharp distinction; for the tegule, when the numerous species are

examined, are found to decrease gradually in size till they finally disappear altogether.

If we have before us a Muscid with fully-developed tegule, or another in which they

are wanting, it is easy to decide in which section the insect ought to be placed ; but it is

quite impossible to define the just limits of the two sections when these organs become

so small that we should be inclined to call them rudimentary. Moreover, there are many

examples in various genera, placed for good reasons in the first section, in which the tegule

are still less developed than in other genera placed, for equally good reasons, in the second

section. Nevertheless this division into two chief sections, ‘ Calyptere ’ and ‘ Acaly-

pteree,’ is still in general use, and is adopted, without reservation, by Schiner in his ‘ Fauna

Austriaca,’ ‘ Diptera,’ and ‘ Catalogus Dipterorum Europe,’ and also by other writers.

The above remarks are equally applicable to the characteristics of almost every group

(and to most of the genera also), into which these two sections are further divided,

especially to those of the ‘ Calyptere.’ It is as if Nature, in creating numerous different

forms answering to the same type, had brought forth all sorts of transitions. ‘The most

ingenious entomologists have not yet been able to detect well-defined characteristics by

which the groups and genera of this family may be surely distinguished from each other.

* By F. M. van peR WULP.

TRICHOPODA. 3

In consequence of this uncertainty in the system, sometimes the most nearly-allied

species are placed in very widely separated genera, or species which are totally different

are united in the same genus. And this does not concern only the less-known exotic

forms, but even the European species, which have undoubtedly been more carefully

studied. Owing to this confusion, and also to incomplete descriptions, it is usual to

find in most collections of Muscide many even generically undetermined specimens.

It remains for a future monographer to solve these difficulties, and to ground a new

system on more positive and clearer characteristics.

Recent authors on Dipterology have, no doubt from this cause, neglected almost

entirely the ‘ Muscide Calyptere,’ so that the numerous exotic (especially the American)

species of this section are still, for the most part, altogether undescribed.

In general I have adopted, with regard to the division into groups and genera, the

classification used by Schiner in the ‘ Fauna Austriaca’ for the European species, as

being, at the present time, the best in use. With Loew I say :—‘“ For, however insuf-

ficient I may find the limitation of these families (groups and genera), I know nothing

better to put in its place” (Monogr. of the Diptera of N. America, i. p. 34). I have

nevertheless been obliged to establish some new genera for a few deviating forms.

MUSCIDAE CALY PTERZ.

Group PHASINZ.

TRICHOPODA.

Trichopoda, Latreille, in Cuvier’s Régne Anim. v. p. 512 (1829).

1. Trichopoda pennipes,

Musca pennipes, Fabr. Ent. Syst. iv. p. 348. 149°.

Dictya pennipes, Fabr. Syst. Antl. p. 327. 5.

Trichopoda pennipes, Wiedem. Aussereur. zweifl. Ins. ii. p. 274. 9”.

Phasia jugatoria, Say, Journ. Acad. Phil. vi. p. 172. 2°; Complete Writings, ii. p. 364.

Hab. North America }?, Indiana *, Georgia, Florida.—Muxico, Presidio (Forrer).

A single female specimen.

2. Trichopoda pyrrhogaster.

Trichopoda pyrrhogaster, Wiedem. Aussereur. zweifl. Ins. ii. 272. 6°.

Hab. Guatemata, San Gerénimo (Champion).—? Sours America }.

A single male specimen.

From Mexico are also described :—

Trichopoda mexicana, Macq. Dipt. Exot., Suppl. i. p. 172. 3.

nigricauda, Bigot, Ann. Soc. Ent. Fr. sér. 5, vi. p. 394. 1.

4 DIPTERA.

ACAULONA, gen. nov.*

Body rather bare. Head large, notably broader than the thorax; eyes bare, with the inner orbits almost

perpendicular ; front (in both sexes?) broad ; frontal bristles short and weak; cheeks narrow, with a row

of short hairs near the eyes and a pair of bristles placed at some distance above the oral margin ; this

latter a little prominent. Antenne half as long as the face ; second joint somewhat elongated ; third

joint elliptical, nearly double as long as the second ; arista bare. Proboscis not longer than the head ;

palpi small, thickened towards the end. Thorax (seen from above) quadrate, with distinct transverse

suture; scutellum semicircular. Abdomen convex, ovate, with five visible segments; segments 1-4 of

equal length; the apical segment much smaller, with two short appendages beneath (male genital

organs ?). Legs rather short, with a few dispersed, weak bristles. Tegule large. Wings longer than

the abdomen, the costa and hind border parallel, the apex rounded ; apical cell ending at the wing’s apex,

closed but not petiolated; curvature of the fourth vein rounded ; posterior cross-vein somewhat curved,

beyond the middle of the apical cell. |

On account of the distinctly visible five abdominal segments, this genus must be

referred to the ‘ Phasine,’ and not to the ‘Gymnosomine ; in the latter the abdomen

shows but four segments. Acaulonais nearly allied to Xysta, but is distinguished from

it by the broad front and the almost total absence of pilosity. In its general facies it

has some affinity with Cistogaster (of the Gymnosomine group); but differs from that

genus by the number of abdominal segments, and by the non-petiolated apical cell. |

I include in this genus a single species from Mexico.

1. Acaulona costata, sp.n.(%). (Tab. III. figg.1; 1a, head; 16, abdominal

appendages. ) |

Head yellowish-white; frontal band, antenne, thorax for the greater part, scutellum, and legs (except the

base of the femora), black; abdomen fulvous, with large, triangular, blackish dorsal spots ; costal half of

the wings fuscous.

Length 5 millim.

Front as broad as the eyes; its lateral borders and the whole of the face and cheeks yellowish-white ; frontal

band very broad, velvety-black ; palpi pale rufous. Thoracic dorsum black, opaque, before the trans-

verse suture whitish, with three broad, black, longitudinal bands; pleure grey; scutellum black,

Abdomen slightly glossy, fulvous, with a large, triangular, brownish-black spot on each segment, that on :

the fourth segment extended over almost the whole surface; last segment entirely rufous, its appendages .

black. Legs black; coxe and base of the femora rufous; hind tibiee outwardly convex; claws and

pulvilli very small. Tegule yellowish. Wings grey, on the anterior half fuscous; this dark colour

limited by the fourth vein up to the small cross-vein, and for the rest, though not so well-defined, by the

third vein.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman), Medellin near Vera Cruz

(H. H. Smith).

A single specimen from each locality. These agree perfectly with one another, and

are apparently both males.

Group GYMNOSOMIN A.

No species of this group are contained in the collection before me, nor are there any

recorded from Central America. Two genera, Gymnosoma and Cistogaster, are found

in the United States.

* G (absque), kavdds (petiolus).

OCYPTERA. 5

Group OCYPTERINA.

OCYPTERA.

Ocyptera, Latreille, Hist. Nat. Ins. et Crust. xiv. p. 378 (1804).

1. Ocyptera soror.

Ocyptera soror, Bigot, Ann. Soc. Ent. Fr. sér. 5, viii. p. 46. 8°.

Ocyptera simplex, Bigot, l.c. p. 47. 9°.

Hab. Mexico 12, Orizaba (H. H. Smith & F. D. Godman).

Three male specimens, captured in December 1887, agree perfectly with Bigot’s

description of O. soror. Bigot was, however, mistaken in the determination of the sex;

for, as he calls the pulvilli large (‘‘ pelotes grandes”’), it is evident that he must have

had male and not female specimens before him. .

According to his description of O. simplex, this insect seems to differ from O. soror

in nothing but in the small pulvilli. I believe I am correct in regarding it as the

female of O. soror.

Group PHANIN.

The Phaninz contain as yet no known representative in Central America.

Group TACHININE.

The following synoptical table of the genera of this group includes only those which

are represented, so far as is yet known, in the Central-American fauna :—

1. Scutellum and abdomen, or at least the abdomen, armed with

vigorous and more or less blunt spines. . . . . » 2 2

Scutellum and abdomen with the usual bristles (macrochzet) . 6.

2. Palpi as long, or nearly as long, as the very elongated pro-

boscis, and, like this, horizontally exserted . . . . . . Dejeania, Rob.-Desv.

Palpi notably shorter than the proboscis, sometimes rudimen-_

tary or totally absent . 2. 2 1 we. ew eee.

3. Eyeshairy 2. 2. 2. 2. ew. we we ee.) Aystricia, Macq.

Eyes bare. 2. 6 6 ee ee ee ee ee ee ee

4, Palpi rudimentary or absent. . . . 1. 1... . «~~. «©Saundersia, Schin.

Palpi fully developed . . . . 5.

5. Third joint of the antenne but little longer than the second . Jurinia, Rob.-Desv.

Third joint of the antennz more than twice as long as the

second .... woe . . . . Belvosia, Rob.-Desv.

6. Third joint of the antenne shorter than the second * . . . Echinomyia, Dum.

* In one of the species of this genus (Z. dispar) the third joint of the antenne is as long as the second. In

general structure and facies this insect, however, agrees with the other species of Echinomyia, and I accordingly

include it in that genus.

ee)

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

DIPTERA.

Third joint of the antenne as long as or longer than the second

. First posterior (apical) cell ending “istinetly before the apex of

the wing .. .

First posterior (apical) cell ending at or very near the a apex of

the wing

. Palpi rudimentary or absent

Palpi fully developed . . . . . rn

Eyes hairy ; fourth vein prolonged at its point of curvature

Eyes bare; fourth vein not prolonged at its point of curvature

Cheeks with one or more distinct bristles .

Cheeks without bristles .

Arista distinctly jointed .

Arista not jointed, or at the most with a har dly visible soint

at the extreme base. Lee oe ee

Antenne short and broad; arista not nicked ; head not

swollen ; frontal bristles rather stout . . .

Antenne long and slender; arista nicked; head, and especi-

ally the front, very swollen; frontal bristles weak but

numerous .

Eyes hairy .

Eyes bare

Metallic-green species . . ~ oe ee

Grey or black, seldom fulvous or partly fulvous, species .

Third joint of the antenne at the most twice as long as the

second . a

Third joint of the antennze more than twice as long as the

second . .

Lateral ridges of the ace without bristles .

Lateral ridges of the face with a row of bristles .

Antenne very short; macrochetze weak Loe

Antenne almost as long as the face; macrochete rather

strong . .

Lateral ridges of the face bare kee

Lateral ridges of the face with a row of bristles .

Vibrissz at some distance above the oral margin .

Vibrissz quite at the oral margin .

Second joint of the antennz rather elongated, the third joint

at the most double as long as the second; some veins of the

wings bristly ; fourth vein slightly prolonged at its point of

curvature ; apical and posterior cross-veins very oblique

Second joint of the antennz very short, the third joint more

than double as long as the second ; veins not bristly ; fourth

vein not prolonged at its point of curvature; cross-veins not

more oblique than usual .

11.

Micropalpus, Macq.

10.

Trichophora, Macq.

Gymnomma, v. d. Wulp.

12.

138.

Nemocheata, v. d. Wulp.

Gonia, Meig.

14.

17.

Gymnocheta, Rob.-Desv.

15.

Nemorea, Rob.-Desv.

16.

Ezxorista, Meig.

Phorocera, Meig.

Miltoyramma, Meig.

18.

19.

21.

. Brachycoma, Rond.

20.

Plagia, Meig.

Masicera, Macq.

21.

23.

24:

25.

26.

DEJEANTIA.

Cheeks very broad; eyes proportionately small; fourth vein

not prolonged at its point of curvature Loe

Cheeks narrow; eyes large; fourth vein prolonged at its

point of curvature .

. Eyes hairy ; scutellum and abdomen very densely beset with

macrochete . . Soe ee ee ee .

Eyes bare; scutellum and abdomen with normal macrochetze

Proboscis very long and slender, its apical half turned back-

ward; arista nicked re

Proboscis of the usual form; arista not nicked .

Abdomen elongate-conical or cylindrical; tarsi of the front

legs notably longer than the tibie . . .

Abdomen short-conical or ovate; tarsi shorter than the tibize

Third antennal joint double as long as the second

Third antennal joint more than double as long as the second.

Lateral ridges of the face with a row of bristles; apical cell

open Soe ee ee

Lateral ridges of the face without bristles ; apical cell closed.

DEJEANTA.

Dejeania, Robineau-Desvoidy, Essai sur les Myodaires, p. 33 (1830).

Baumhaueria, Meig. =

Metopia, Meig.

Lasiona, v. d. Wulp.

23.

Siphona, Meig.

24,

25.

26.

Myobia, Rob.-Desv.

Hypostena, Meig.

Degeeria, Meig.

Clista, Meig.

Dejeania and the following three genera (fHystricia, Saundersia, and Jurinia) agree

in their general structure with Echinomyia; but differ in the very robust and spine-like

macrochetz on the abdomen and scutellum, those on the latter being sometimes absent.

Such spines are also to be found in the genus Belvosia; but this genus has not the

Echinomyia-form, the head being broader and the third joint of the antenne more

elongated.

In the genus Dejeania the palpi are strongly developed, and extend horizontally

forwards with the equally elongated proboscis. This and the further characters by

which it is distinguished are clearly and rather amply indicated by Macquart (Dipt.

Exot. ii. 38, p. 32). I have only to add that in all the species known to me the eyes

are bare, the cheeks have a row of weak hairs between the facial ridges and the orbit

of the eyes, and the legs (especially the tarsi) are long and slender; the front tarsi,

however, in the female are a little enlarged ; the last joint of the tarsi in the male is

surrounded by some long and curved bristles, and the claws and pulvilli in this sex are

elongated.

Six species are here enumerated from our region.

N.B.—D. hystricosa, Williston (Trans. Am. Ent. Soc. xiii. p. 297), from New Mexico,

Arizona, &c., doubtless inhabits Northern Mexico.

8 DIPTERA.

The Central-American species known to me may be characterized as follows :—

1. Black and black-haired species . . . + + + + + e © + ®

Testaceous or fulvous species, the abdomen at least testaceous . 3.

2, Legs wholly, or for the greater part, yellow . . - - + + - pallipes, Macq.

Legs black © 2 2 eee ee ee ee atrata, v.d. Wulp.

3, Abdomen nearly quadrate, with rounded angles; legs black . . rutilioides, Jaenn.

Abdomen cordiform; legs fulvous . . - »- © + © * + 5 4.

4, Palpi fulvous; tarsi simple . woe ee corpulenta, Wied.

Palpi black or piceous ; front tarsi in the male fringed with long

hairs, 2. 0. ee ee ee plumitarsis, v. d. Wulp.

1. Dejeania pallipes. (Tab. I. figg. 1; la, head in profile; 16, the insect in

profile to show the arrangement of the bristles.)

Dejeania pallipes, Macq. Dipt. Exot. ii. 3, p. 34. 2, t. 2. f.91; Suppl. i. p. 143; Schiner, Reise d.

Novara, Zool. iii., Dipt. p. 337’.

Hab. Costa Rica, Rio Sucio, Volcan de Irazu (Rogers); Panama, Volcan de Chiriqui

5000 to 6000 feet (Champion).—Soura America?; CoLomBra, Bogota *. |

Two males and five females.

This species is easily recognized by the deep black colour of the body and the dark

tint of the tegula and wings, to which the bright fulvous-yellow legs form a striking

contrast. The femora, however, are usually brown, but in some examples this dark

colour is confined to the base. A single female specimen has the femora totally

yellow, though they are a little less clear in tint than the tibie and tarsi.

The antenne and palpi are black, the thin hairs on the cheeks obscure, and the

frontal bristles rather weak. The macrochete of the thorax are not longer than the

black hairs and concealed between these latter; the black spines on the abdomen are |

very numerous. ‘The femora, especially the front pair, are densely beset with long hairs ;

the front tibiee show at the outside some short black bristles, which, however, are

wanting on the apical half; the posterior tibie have in the middle some long and

robust black bristles; the bristles of the tarsi are yellow; the claws yellow, with

black tips.

2. Dejeania atrata, sp.n., ¢. (Tab. I. fig. 2.)

Entirely black, including the antenne, proboscis, palpi, and legs; head whitish; tegule dark brown; wings

brownish.

Length 11 millim.

Hab. Costa Rica, Volcan de Irazu 6000 to 7000 feet (Logers).

Smaller than the foregoing (D. pallipes has a length of 12-18 millim.), and similarly

coloured, but differing in the totally black legs and in the lighter coloration of the :

wings. Head dark grey or white, according to the reflection of the light ; oral margin

DEJEANIA. 9

yellowish ; front as broad as the diameter of the eyes, with a dark brown median band ;

the sides and cheeks with a black pile; frontal bristles more numerous and more

robust than in D. pallipes, descending to the root of the antenne; beard whitish.

Antenne, proboscis, and palpi black ; third joint of the antenne as long as but notably

broader than the second; arista thickened beyond the middle; palpi with black

bristles. Thorax black, with long black hairs and still longer macrochete ; pleure

bluish in tint, below (and the cox) with a whitish-grey tomentum. Scutellum black,

with numerous spines. Abdomen broader than the thorax, cordiform, shining black,

bluish in tint laterally and beneath ; its entire surface, except the lateral parts of the |

venter, densely armed with spines. Legs black, abundantly beset with bristles; the

bristles of the outer edge of the middle tibize longer; claws wholly black; pulvilli

whitish. ‘Tegule dark brown; wings brownish, with black venation.

A single male specimen.

8. Dejeania rutilioides. (Tab. I. figg. 3; 3a, head in profile.)

Dejeania rutilioides, Jaenn. Neue exot. Dipt. p. 86.116*; O. Sacken, Western Dipt. p. 354? ; Cat.

Dipt. N. Amer. 2nd edit. p. 256, note 266.

Hab. Norta Auurica, Colorado ?, California ?, New Mexico.—MeExico!; Costa Rica,

Rio Sucio, Volcan de Irazu 6000 to 7000 feet (Rogers).

Two male specimens, perfectly agreeing with Jaennicke’s description 1, which, how-

ever, is founded on the female sex alone.

The abdomen is broader and more flattened than in the other species of the genus,

being somewhat quadrate with rounded angles ; the spines on the two middle segments

of the abdomen form a curved row round the black dorsal spots; and these spots are .

also beset with some shorter spines.

In the shape of the antenne this species more nearly approaches the genus Echino-

myia, the third joint being a little shorter than the second and rather convex at the

front side. The palpi are black, or at least very dark brown; the tarsal claws

are wholly black.

4, Dejeania corpulenta, (Tab. I. fig. 4.)

Tachina corpulenta, Wiedem. Aussereur. zweifl. Ins. ii. p. 280. 1°.

Dejeania corpulenta (Wiedem.), v. d. Wulp, Tijdschr. voor Ent. xxix. p. xxx’.

Dejeania rufipalpis, Macq. Dipt. Exot. ii. 8, p. 35. 5, t. 3. £.1°.

Dejeania vexatriz, O. Sacken, Western Dipt. p. 343°.

Hab. Unitep States, Rocky Mountains‘, Colorado’, New Mexico, Arizona.—

Mexico!*; Costa Rica, Cache, Volcan de Trazu 6000 to 7000 feet (Rogers) ; Panama,

Volcan de Chiriqui 4000 to 5000 feet (Champion).—CoLomB1a, Bogota ?.

A male and four female specimens.

BIOL. CENTR.-AMER., Dipt., Vol. II., April 1888. C

10 DIPTERA.

These examples vary considerably in size ; the largest hasa length of 14, the smallest

of 10 millim. (Wiedemann gives the length as 6 lines, Macquart as 54 lines, Osten

Sacken as 12-13 millim.) In all our specimens the palpi are fulvous, and a little

shorter than the proboscis. In Wiedemann’s description the colour of the palpi is

not indicated, and on account of this omission it is applicable to two very closely

allied species—the one with fulvous and the other with black palpi. Macquart has

determined the latter as D. corpulenta (Wiedem.), and described the first as a new

species under the name of D. rufipalpis. According to Osten Sacken, who has examined

the typical specimens of Wiedemann in the Museum at Vienna, the true D. corpulenta

(Wiedem.) agrees in all respects with his D. veratrix (with red palpi), and D. rufi-

palpis, Macq., is synonymous with them (see Osten Sacken, ‘ Catal. of the Described

Diptera of North America,’ p. 256, note 265). D. corpulenta, Macq. (with black

palpi) requires thus a new name (see the following species).

To the cited descriptions I may still add the following characters :—The frontal

bristles are but moderately robust and descend to the number of three or four beneath

the base of the antenne. The third joint of the antenne is ovate, as long as the

second; this latter, however, is narrower, hairy on its upperside, and bears a rather

long bristle. The hairs of the cheeks are yellow, and the beard is similarly coloured.

The black macrochete of the thorax are very conspicuous between, and also longer

than, the less obscure pilosity. The foot-claws are yellow, with black tips.

5. Dejeania plumitarsis. (Tab. I. figg. 5 a, apex of the abdomen, 6; 4 6, front

tarsus, ¢.)

Echinomyia corpulenta, Macq. Suit. & Buffon, Dipt. ii. p. 77. 22 (exclus. syn. Wiedemann).

Dejeania corpulenta, Macq. Dipt. Exot. ii. 8, p. 85. 4’, and Suppl. i. p. 143, t. 12. f. 2; Schiner,

Reise d. Novara, Zool. iii., Dipt. p. 337. 143° (exclus. syn. Wiedemann).

Dejeania plumitarsis, v. d. Wulp, Tijdschr. voor Entom. xxix. p. xxxi°.

Hab. Mexico?; Guatemata, Cerro Zunil 4000 to 5000 feet (Champion) ; Costa Rica,

Volcan de Irazu 6000 to 7000 feet (Rogers).—Sovutn America ?; CoLomBia, Bogota}.

We have received a male from Costa Rica and a female from Guatemala.

This species is closely allied to the foregoing, but can be at once distinguished by

the obscure coloration of the palpi. These organs are as long as the proboscis; in the

male they are black, but in the female more of a dark brown tint, though having also

a black aspect in consequence of their pilosity.

The male is well characterized by having some long black hairs, extending at the

anus beyond the red pile and the black spines; and especially by a row of black hairs

on the inner side of the three intermediate joints of the front tarsi.

In both sexes the black dorsal spots of the abdomen are more extended than in the

preceding species: in the Guatemalan female specimen they almost form transverse

bands.

DEJEANIA.—HYSTRICIA.

Besides the above-mentioned species the following one is described from Mexico :—

Dejeania analis, Macq. Dipt. Exot. ii. 3, p. 34. 3, t. 3. £3.

(Syn. Echinomyia

analis, Bigot in Sagra’s Hist. fisica polit. y nat. de Cuba, vii., Ins.

p- 340.—Cuba.) .

HYSTRICIA.

Hystricia, Macquart, Dipt. Exot. ii. 3, p. 43 (1848).

This genus is closely allied to Dejeania; but the proboscis is not so long, and the

palpi, though perfectly developed, are notably shorter than it.

The eyes are distinctly

pubescent.

The Central-American species known to me may be distinguished in the following

manner :—

1. Legs black 2.

Legs fulvous or yellow . . . woe ee 7.

2. Palpi black; abdomen grey, with black reflections . albiceps, v. d. Wulp.

10.

Palpi fulvous ; abdomen unicolorous, shining black, piceous, or

metallic

. Base and costa of the wings fuscous ; spines of the abdomen few

in number and regularly ranged . woe eee

Wings unicolorous (sometimes yellowish at the base and costa,

or blackish at the extreme base, but never with a fuscous

portion) ; abdomen densely beset with spines

. Thorax and scutellum greyish-yellow . . .

Thorax and scutellum blackish, the thorax sometimes with grey

tomentum .

. Abdomen bluish- black, almost stecl-blue

Abdomen black or piceous .

. Third joint of the antenne as long as Or but little longer than

the second . soe eee . .

Third joint of the antenne . three or four times as long as ‘the

second .

. Abdomen black, with light ¢ grey incisions or r dorsal spots

Abdomen red or yellow, sometimes with black markings

Thorax blackish-grey, with indistinct longitudinal stripes .

Thorax light cinereous, with distinct longitudinal stripes

. Antennze and tarsi black .

Basal joints of the antenne and the tarsi fulvous - oe oe

Lateral borders of the second and third abdominal segments

densely beset with black spines; middle tibize outwardly with

several long macrochete . . . . .

Lateral borders of the second and third abdominal segments only

with a few (two or three) black spines; macrochete of the

middle tibie not longer than those of the front and hind

tibize

infuscata, v. d. Wulp.

ambigua, Macq.

cyaneiventris,v.d.Wulp.

pollinosa, v. d. Wulp.

soror, Will.

velutina, v. d. Wulp.

10.

amena, Macq.

micans, v. d. Wulp.

abrupta, Wiedem.

ll.

12 DIPTERA.

11. Abdomen with black dorsal spots, which are sometimes united

to a longitudinal band; anus (besides the black spines) with

red pilosity . . . 2... . ee ee ee dorsalis, v. d. Wulp.

Abdomen without dorsal spots, but only the last segment black,

with pilosity of the same colour. . . ..... . . . pyrrhaspis, Wiedem.

1. Hystricia albiceps, sp.n. ¢. (Tab. I. fig. 6.)

Bluish-black ; abdomen light grey ; head whitish; antenna, palpi, and legs black ; third joint of the antenne

a little longer than the second ; wings infuscated.

Length 14 millim.

Face and cheeks white, with blackish reflections; face a little declivous, with the oral margin projecting; the

cheeks beset with weak hairs; above the vibrissae are some short bristles ; a few bristles also at the lower

borders of the cheeks; beard white. Front narrowed near the vertex, blackish-grey, with a piceous

median band and a weak and dark pilosity ; frontal bristles abundant, descending to a little beneath the

root of the antennz ; occiput with grey-and-black mixed pile. Eyes densely clothed with yellowish hairs.

Second joint of the antenne with many bristles; third joint a little longer and broader than the second,

rounded at the apex. Proboscis black; the palpi broad, prominent, clothed with greyish tomentum, and

beset with black bristles. Thorax and scutellum with a grey tomentum, the front part of the thorax

with four longitudinal black stripes and more distinct tomentum; macrochezte of the thorax long and

robust, those of the scutellum ranged in two rows and more in the form of spines. Abdomen broader

than the thorax, with light bluish-grey tomentum, the tomentum covering the ground-colour; second

segment in the middle and at the sides, and the third segment over its entire breadth, densely beset with

black spines; fourth segment, except its front border, with numerous black bristles and spines ; venter

with spines in the middle. Legs rather slender; front femora outwardly with grey tomentum ; bristles

of the legs moderately long and stout, those at the outside of the middle tibie longer; claws and pulvilli

yellow, the former with black tips. Tegule and wings brown; the small cross-vein of the latter placed

somewhat before the middle of the discal cell; the apical cross-vein incurved at its base; the posterior

cross-vein like a straight line, slightly waved.

Hab. Costa Rica, Rio Sucio (Rogers).

A single male specimen.

2. Hystricia infuscata, sp.n., 2.

Black ; thorax and scutellum with cinereous tomentum ; head yellowish; basal joints of the antenne rufous,

the third joint black and a little longer than the second; palpi pale rufous; abdomen piceous, with

scattered spines ; legs black ; wings dark grey, fuscous at the base and along the costa.

Length 9:5 millim.

Head pale yellow ; face vertical, prominent towards the oral margin ; front yellowish-grey, a little narrowed

behind, but even on the vertex broader than the diameter of the eyes; frontal bristles descending to the

number of three or four beneath the root’ of the antennew, the outward bristles and those on the vertex

stouter ; vibrisse robust, with a few shorter bristles near them ; beard and a rather dense pilosity on the

cheeks yellowish. Basal joints of the antenne rufous; second joint elongate, broader towards the end,

with several black dorsal bristles; third joint black, broader and a little longer than the second, convex

at the front side, rounded at the apex ; arista black, indistinctly jointed. Proboscis shining black ; palpi

pale rufous, enlarged towards the end, with short black bristles. Thorax and scutellum black, with

cinereous tomentum—this before the transverse suture is more compact, and shows four black longi-

tudinal stripes, the two median of which are linear. Abdomen convex, shining, piceous, with black pile ;

the spines not numerous and regularly arranged, the dorsal ones as well in the middle as on the hind

borders of the segments. Legs black; the front femora outwardly with grey tomentum ; bristles of the legs

long and stout, especially those of the outside of the middle tibie ; foot-claws black, the pulvilli yellow.

HYSTRICIA. 13

Tegule brown, with a narrow yellowish margin. Wings brownish-grey ; the base and the costa fuscous,

less obscure, however, beyond the small cross-vein and the end of the first vein; small cross-vein on the

middle of the discal cell; apical and posterior cross-veins oblique and a little curved.

Hab. Mexico, Medellin near Vera Cruz (H. H. Smith).

A single female specimen, captured in January 1888.

3. Hystricia ambigua. (Tab. I. fig. 7.)

Aystricia ambigua, Macq. Dipt. Exot., Suppl. iv. p. 172. 9°.

? Hystricia ambigua, Williston, Trans. Am. Ent. Soc. xiii. p. 298’.

Face and cheeks pale ochraceous, almost whitish ; oral margin not prominent; front cinereous, narrowed

behind, especially in the male; median band black; pilosity of the front yellowish-grey, that of the

cheeks, chin, and occiput clearer ; frontal bristles rather long and stout, descending on both sides to a

little beneath the root of the antenne and there placed closer together; vibrissw distinctly above the oral

margin, and surmounted by some smaller bristles ; moreover, there are two or three bristles at the chin.

Antenne black, with some cinereous tomentum ; second joint with several bristles ; third joint broader,

about as long as the second, outwardly convex, rounded at the end; arista distinctly three-jointed, thick-

ened to beyond the middle. Proboscis shining black; palpi ochraceous, broad, and with short black

bristles towards the end. Thorax and scutellum greyish-yellow, with a dense pilosity of the same colour ;

on the thorax are indistinct dark longitudinal stripes and weak bristles ranged in longitudinal rows.

Abdomen shining, bluish-black, densely beset (like the scutellum) with black spines. Legs black; front |

femora outwardly with light grey tomentum; at the underside of the femora and at the outside of the

tibie are several bristles, those of the intermediate and posterior tibie being longer and stouter; claws

and pulvilli yellow, the claws with black tips. Tegule greyish, with a yellow margin. Wings grey, at

the base and along the costa yellowish; veins testaceous ; curvature of the fourth veln with an acute

angle ; small cross-vein on the middle of the discal cell ; posterior cross-vein almost straight.

Length 12°5-16 millim.

Hab. Norra America, Colorado 2.—-Mexico ! 2, Orizaba (H. H. Smith & F. D. Godman);

GuatemaLa, San Gerénimo (Champion) ; Costa Rica, Rio Sucio, Cache, Volcan de lrazu

6000 to 7000 feet (Rogers).

Several specimens of both sexes.

4, Hystricia cyaneiventris.

Hystricia cyaneiventris, v.d. Wulp, Comptes Rendus Soc. ent. Belg. xxxviil. p. cexci’.

Hab. Mexico, Guanajuato (Dugés 1)

A male specimen in the Royal Museum at Brussels.

I here give a translation of my description (/. ¢.):—

Head sericeous, pale cinereous ; front somewhat prominent, narrowed behind, with a blackish longitudinal

band which is narrower than the cinereous sides; frontal bristles in a single row, descending about

as far as the second joint of the antennew; vibrisse at a little distance from the oral margin, and

surmounted by some smaller bristles; cheeks broad; occiput densely beset with yellowish hairs, and at

the orbits of the eyes with black bristles. Eyes densely clothed with yellowish pile. Antenne black ;

second joint clothed with white tomentum; third joint twice as long as the second. | Proboscis dark

brown; palpi fulvous. Thorax metallic green; the front half with cinereous tomentum and four longi-

tudinal black stripes; on the pleure the ground-colour for the greater part covered with cinereous

tomentum. Scutellum and abdomen shining bluish-black, nearly steel-blue; abdomen oval, convex,

14 DIPTERA.

densely beset with black hairs and strong black bristles. Legs black (the front femora outwardly with

whitish reflections), beset with many bristles, those of the outward basal half of the middle tibiz longer.

Tegule dark brownish-grey. Wings grey; posterior cross-vein oblique and a little curved at the base.

Length 12 millim.

This insect is perhaps conspecific with Jurinia ceruleo-nigra, Macq. (Dipt. Exot.,

Suppl. i. p. 146. 13, t. 13. f. 8), from Colombia, which, according to the hairy eyes,

must be included in the genus Hystricia. ‘The principal differences between the two

descriptions consist in the following points :—

J. ceruleo-nigra. H. cyaneiventris.

Head pale yellowish. ' Head pale cinereous.

Third joint of the antenne a little longer Third joint of the antennz twice as long as

than the second. the second.

Thorax black, with whitish tomentum (no Thorax with four longitudinal black stripes.

mention is made of dark stripes).

Wings brown. Wings grey.

5. Hystricia pollinosa, sp.n., ¢ ¢. (Tab. I. fig. 8.)

Blackish ; thorax grey, with four black stripes; head pale yellow (¢) or white (?); antennz and legs black,

the third joint of the antenna a little longer than the second ; palpi ochraceous ; foot-claws yellow, with

black tips ; wings brownish-grey.

Length 165-19 millim.

Head of the male straw-yellow, of the female white, with the oral margin yellowish ; face vertical, somewhat

prominent below; front in the male narrowed behind, greyish-yellow, with a black median band, that of

the female broad and blackish ; pilosity of the front, cheeks, and occiput (and the beard also) pale yellow ;

frontal bristles stout, but not numerous, some few (placed close together) descending to a little beneath

the base of the antenne; vibrisse robust, surmounted by some shorter and weaker bristles; before the

beard are three bristles. Antenne black, in some specimens the end of the second joint and the base of

the third rufous ; on the upperside of the second joint are some rather long bristles; third joint a little

longer and broader than the second, rounded at the end; arista indistinctly jointed. Proboscis shining

black ; palpi ochraceous, enlarged and with some short black bristles towards the end. Thorax and

scutellum black, sometimes with faint metallic reflections; thorax above with light grey tomentum,

blackish pilosity, and four longitudinal black stripes, between which are rows of bristles ; behind the root

of the wing is a rufous spot; pleure above the front and hind coxe with yellowish tomentum and partly

yellow hairs; scutellum densely beset with bristles, two of which at the hind margin are thicker and

more spine-like. Abdomen black or reddish-piceous, everywhere beset with black spines, which in the

female are very numerous beneath the anus. Legs black, the front femora outwardly with grey tomentum

and yellowish hairs; for the rest the pilosity is blackish and the bristles rather numerous and stout; at

the underside of the middle femora are three very strong bristles; foot-claws pale yellow, with black

tips. Tegule and wings brownish-grey; small cross-vein oblique, placed a little before the middle of the

discal cell; apical cross-vein curved inward at its base; posterior cross-vein slightly curved. |

Hab. GuateMata, San Gerdénimo (Champion); Costa Rica, Rio Sucio and Cache

(Rogers).

Two male and two female specimens.

HYSTRICIA. 15

6. Hystricia soror. (Tab. I. fig. 9.)

Hystricia soror, Williston, Trans. Am. Ent. Soc. xiii. p. 297 (1886) ’.

Hab. Norta America, Arizona’.—GvuatemaLa, San Gerdénimo (Champion); Costa

Rica, Cache (Rogers).

A male and five female specimens. These measure from 10-11:5 millim. in length ;

but one of the females (from Guatemala) is much larger than the others (15 millim.),

though not differing in other respects.

To the description of Williston 1 (made from a single female example) I may add :—

The face is but very little inclined and hardly prominent at the oral margin. ‘The

scutellum is not quite dark red (as it is called by Williston), but more of a piceous-

brown colour. The faintly reddish colour of the tibiz is in all our specimens confined

to the extreme base;. the foot-claws are wholly black; the tegule blackish. The

wings have a grey tint and are blackish at the base; the small cross-vein is placed

before the middle of the discal cell; the two exterior cross-veins are slightly curved ;

the apical cell is somewhat drawn out in a point at its lower end.

7. Hystricia velutina, sp.n. ¢. (Tab. I. fig. 10.)

Thorax cinereous, with four distinct black stripes; scutellum rufous-brown ; abdomen velvety-black, with

whitish hind borders to the segments; basal joints of the antenna, palpi, and legs fulvous; tegule and

wings dark brown.

Length 17-5 millim.

Face scarcely inclined, not prominent at the oral margin, in the middle whitish; cheeks bare; a row of

staaller bristles above the vibriss# ; beard yellow. Front much narrowed behind, yellowish-cinereous,

with a black median band; frontal bristles abundant, but not very strong, descending as far as the end

of the second antennal joint. Eyes densely clothed with yellowish pile. Occiput with yellow hairs ;

above, behind the eyes, with long black bristles. Antenne black, the two basal joints rufous, the

second beset with several black bristles ; the third joint twice as long as the second; arista thickened

to half its length. Proboscis and palpi fulvous, the latter rather stout and with short black bristles.

Thorax dark cinereous, with four very distinct broad longitudinal black stripes (which are continued

behind the transverse suture); pilosity black, the bristles rather weak. Scutellum reddish-brown, with

strong bristles, those of the hind border spine-like ; metanotum grey. Abdomen velvety-black, the sides

of the second and third segments brownish ; on the front side of the second and following segments is a

narrow whitish-grey (somewhat silvery) border, which at the middle of each is extended to a small trian-

gular spot; pilosity black and rather long (the spine-like macrochete, on the contrary, weaker and less

numerous than in the preceding species, though more abundant near the anus). Legs fulvous, almost

orange-yellow ; coxe and femora more obscure, in consequence of their short black pilosity ; on the front

side of the first pair of coxe is a clear yellow reflection; tibiae and tarsi with yellow pile; the black

bristles of the legs scarce and rather weak; the curved bristles round the terminal joint of the tarsi

yellow ; the pulvilli and claws also yellow, the latter with black tips. Tegule blackish-brown, with a

yellowish margin. Wings dark brown, narrowed towards the apex; small cross-vein placed distinctly

before the middle of the discal cell; apical cross-vein incurved near its base and running obliquely

onwards in a straight line towards the costa; posterior cross-vein oblique, slightly undulate.

Hab. Costa Rica, Rio Sucio (Rogers).

A single male.

DIPTERA.

8. Hystricia amena. (Tab. I. fig. 11.)

Hystricia amena, Macq. Dipt. Exot. ii. 8, p. 44. 2.°

Hab. Mexico!; Costa Rica, Volcan de Irazu 6000 to 7000 feet (Rogers).

A single female specimen.

As Macquart has only described the male, I give here a full description of the

female :—

Head greyish-white ; face nearly vertical, a little prominent at the oral margin ; vibrisse accompanied below

by a few other bristles, and surmounted by a single shorter one; cheeks bare; beard yellowish. Front

dark grey, much narrowed behind; median band black; frontal bristles abundant, though but mode-

rately long and stout, several placed close together on both sides of the base of the antenne ; occiput with

grey pile, and with a row of short black bristles above behind the eyes. Antenne black; second joint

bristly on its upperside ; third joint twice as long as the second, rather broad, before and behind recti-

linear, truncate at the end; arista indistinctly jointed, thickened to beyond the middle. Proboscis testa-

ceous, at the end with yellow pile; palpi slender, exserted, fulvous, with rather long black bristles.

Thorax cinereous, with four narrow blackish stripes ; a spot under the shoulders and another beneath the

root of the wings are reddish; pilosity of the upper part black and mixed with many bristles, that of the

pleure yellow. Scutellum rufous, with a great number of black spines. Abdomen notably broader than

the thorax ; bright fulvous, somewhat transparent, with black dorsal and lateral spots on the hind borders

of the segments, the dorsal spots of the second and third segments round, and the lateral ones of the apical

segment larger; the black spines are neither strong nor numerous enough to cover the ground-colour,

only on the black spots are they more accumulated. Legs fulvous, the tibie more of a brownish-red, the

tarsi black; front tarsi dilated; bristles of the legs rather weak, the underside of the coxe clothed with

a long yellow pilosity ; foot-elaws fulvous, with black tips; pulvilli pale yellow. Tegule fulvous, with

yellow pile. Wings brownish; small cross-vein placed a little before the middle of the discal cell ;

apical and posterior cross-veins curved. Length 13 millim.

9. Hystricia micans, sp.n., ¢ 9. (Tab. I. fig. 12.)

Antenne black, with the basal joints rufous, the third joint as long as the second; cheeks with blackish pile;

thorax cinereous; scutellum testaceous ; abdomen brownish-red, with black dorsal and lateral spots and

white incisions ; legs, including the tarsi, fulvous; tegule and wings brownish.

Length 13-15 millim.

Face and cheeks yellowish, the latter with a blackish rather long pile; front of the male much narrowed

behind, that of the female broader, its lateral borders yellowish-grey, the median band black. Basal

joints of the antenne rufous; third joint black (of about the same shape as in the preceding species).

Proboscis piceous, the end with yellow pile; palpi rather slender, very little thickened near the tip, the

upperside with short, the underside with longer, black bristles. Thorax and scutellum as in H. amena,

the scutellum, however, less clear; macrochete of the thorax (at least in the female) longer and more

numerous. Abdomen brownish-red, with black dorsal and lateral spots, the incisions with a white reflec-

tion; the spines rather more numerous than in H.amena. Legs, including the tarsi, fulvous; front tarsi

dilated in the female; underside of the coxe with yellow pile, mixed with black bristles, that of the

anterior femora also with yellow hairs ; for the rest the bristles of the femora and tibiae are a little stouter

and longer than in H. amena; claws yellow, with black tips ; pulvilli pale yellow or whitish, in the male

surrounded by some black bristles. Tegule and wings greyish-brown ; venation as in H. amena.

Hab. Costa Rica, Rio Sucio, Volcan de Irazu 6000 to 7000 feet (Rogers).

Three males and three females.

HYSTRICIA. 17

10. Hystricia abrupta.

Tachina abrupta, Wiedem. Aussereur. zweifl. Ins. ii. p. 298. 227.

Hystricia abrupta, Williston, Trans. Am. Ent. Soc. xiii. p. 298 (1886) *.

Hystricia testacea, Macq. Dipt. Exot. ii. 3, p. 44, t.4. £.4°.

Tachina vivida, Harris, Ins. New Engl. 8rd ed. p. 612, t. 3. f. 1*.

Tachina finitima, Walk. List Dipt. Brit. Mus. iv. p. 707°.

flab. Nortu America! %, Nova Scotia?5, New England 24, Washington ?.—MeExico 23,

I know this species only from a single specimen from the United States in my own

collection. The stripes on the thorax are linear. I believe that Williston is correct

in treating Zachina abrupta, Wiedem., as synonymous with this insect.

11. Hystricia dorsalis, sp.n., ¢. (Tab. I. figg. 13; 13a, head in profile.)

Fulvous; upperside of the thorax cinereous, with four distinct black stripes; abdomen with black dorsal spots,

the spots sometimes united to a dorsal band; wings brownish-grey.

Length 15-16 millim.

Face pale ochraceous, retreating a little, not prominent at the oral margin; front much narrowed behind, at

the sides pale ochraceous ; the median band black, reduced to an elongate triangle; frontal bristles weak

but numerous, a few placed close together on both sides of the root of the antenne ; beneath the vibrisse

are several less strong bristles ; beard yellow; eyes with yellowish pile. Antenne fulvous; third joint

usually brown, narrow, twice as long as the second, the latter bristly on its upperside ; arista indistinctly

jointed, slender, its basal half just perceptibly thicker. Proboscis and palpi fulvous, the latter slender

and with small black bristles. Thorax on the upper part cinereous, with greyish-yellow pile and four

distinct black stripes, the stripes interrupted at the transverse suture ; macrochete moderately strong ;

pleure and scutellum fulvous; the latter with a double row of bristles, those of the hind margin somewhat

spine-like. Abdomen at the base broader than the thorax, fulvous, with more or less extended black

dorsal spots, these spots sometimes united to a longitudinal band; pilosity fulvous; the black spines

neither numerous nor strong—on the middle part of the second and third segments they form two trans-

verse rows, and on the venter they exist also but in the middle. Legs fulvous, slender ; on the front coxe

is a row of long black bristles, and on the middle and hind coxe are similar bristles, the latter placed

more in bundles; for the rest the bristles of the legs are weak; foot-claws and pulvilli yellow, the claws

with black tips; terminal joint of the tarsi surrounded by yellow hairs. Tegule fulvous. Wings

brownish-grey, a little reddish along the veins ; small cross-vein placed at or a little before the middle of

the discal cell; apical cross-vein issuing at a right angle from the fourth vein, and the latter with a very

small stump of a vein; posterior cross-vein slightly undulating.

Hab. Guatemata, San Gerénimo (Champion) ; Costa Rica, Cache (Rogers); Panama,

Volcan de Chiriqui 2000 to 3000 feet (Champion). |

Several male specimens.

In its general appearance and coloration this species agrees with Dejeania corpu-

lenta, Wiedem.; but it may easily be recognized by its fulvous antenne, of which the

third joint is much longer, the narrower front in the male, the distinctly hairy eyes,

the fulvous and not elongated proboscis and palpi, and the spines of the second and

third abdominal segments, which not only exist at the hind margin, but also in the

middle. °

A badly preserved female specimen from Costa Rica (Van Patten) seems to belong to

BIOL. CENTR.-AMER., Dipt., Vol. IL, April 1888. d

18 DIPTERA.

this species, or perhaps to H. abrupta ; it has, however, the coloration of the abdomen

and the legs more obscure. |

12. Hystricia pyrrhaspis.

Tachina pyrrhaspis, Wiedem. Aussereur. zweifl. Ins. ii. p. 807. 477.

Hystricia pyrrhaspis, Schiner, Reise d. Novara, Zool. iii., Dipt. p. 332. 1227.

Hab. Mexico, Cordova (Hége); Guatemata, Las Mercedes 3000 feet, San Gersnimo,

Cubilguitz, Lanquin (Champion).—Souta America 2, Brazil }.

Several male specimens.

I believe I correctly refer these Central-American examples to Tachina pyrrhaspis,

Wiedem.; though the specimens are larger (14-19 millim. ; Wiedemann gives 6 lines),

they agree very well with the description.

The species is closely allied to the preceding; the third joint of the antenne is

still more obscure in colour; the abdomen has no dorsal spots nor a dorsal band,

but the fourth segment and also more or less the hind margin of the third are black

and with black pile.

H. abrupta, H. dorsalis, and H. pyrrhaspis form together a group which is chacter-

ized by the fulvous coloration of the body and the slenderness of the third antennal

joint. Tachina anthemon and T. amisias, Walk. (List Dipt. Brit. Mus. iv. pp. 733, 734)

—the first from Brazil, the other without indication of locality—belong to Hystricia,

and apparently to this same group.

13. Hystricia ——.

Hab. Panama, Volcan de Chiriqui 4000 to 6000 feet (Champion).

A single specimen (@ ), too imperfect to describe. It bears a striking resemblance

to the variety of Dejeania pallipes, Macq., with brown-coloured front femora; but on

account of the non-elongated palpi and of the hairy eyes it must be included in the genus

Hystricia.

SAUNDERSIA.

Saundersia, Schiner, Reise d. Novara, Zool. iii., Dipt. p. 333 (1868).

In its principal characters this genus agrees with Dejeania and Hystricia ; but the

palpi are very small, rudimentary, or even totally absent; the eyes are bare; and in

most of the species the arista is a little pubescent, which, however, is only perceptible

under a strong lens.

On account of the rudimentary palpi, some of the species belonging here were

formerly placed in the genus Micropalpus, Macq., from which they differ in their

Echinomyia-like facies and in the strong spines on the scutellum and abdomen.

SAUNDERSIA.

Twelve species from Central America are known to me; they may be distinguished

as follows :—

10.

ll.

1. Saundersia ochripes, sp. n.,¢ °.

Abdomen black (sometimes with clear markings), testaceous,

grey, or rufous with black dorsal spots ;' first segment, at least

at the sides, with spines or bristles . oe eee

Abdomen yellow, with black apex ; first segment without spines

or bristles

Legs yellow or fulvous .

Legs black, at the most the tibiae dark rufous .

Ground-colour of the abdomen black

Ground-colour of the abdomen rufous

. Abdomen unicolorous, though sometimes with greyish incisions

Abdomen with a sharply delineated yellow or white marking

on the fourth segment .

. Thorax and antenne black

Thorax cinereous, the antenne fulvous (third joint very broad)

. Scutellum black, abdominal marking golden-yellow .

Scutellum reddish-brown ; abdominal marking white

. Pilosity of the abdomen between the spines red or rufous

Pilosity of the abdomen black

. Abdomen unicolorous black, densely beset with spines .

Abdomen testaceous or grey; the spines less numerous and

more regularly ranged . - oe we

Thorax blackish, only on the front. side with some grey

tomentum ; legs entirely black re

Thorax (and scutellum) with cinereous tomentum ; tibiz dark

rufous

Abdomen testaceous .

Abdomen grey, with black markings . .

Legs and antenne black; third joint of the antenne » rounded

at the end; scutellum piceous, with spines -

Legs and the two basal joints of the antenne fulvous third

joint of the antenne black, truncate; scutellum black, with

macrochetz |

ochripes, v. d. Wulp.

laticornis, v. d. Wulp.

macula, Macq.

albomaculata, Jaenn.

rufopilosa, v. d. Wulp.

nigropilosa, v. d. Wulp.

10.

unicolor, v. d. Wulp.

rufitibia, v. d. Wulp.

testacea, v. d. Wulp.

cana, v. d. Wulp.

bipartita, v. d. Wulp.

truncaticornis, v. d. Wulp.

(Tab. I. figg. 14; 14a, head in profile.)

Black; face whitish, with brownish reflections; scutellum and abdomen densely spinose ; legs ochraceous ;

tegule and wings dark brown.

Length 11-14 millim.

Deep black; front part of the thorax usually with dark cinereous tomentum and a faint indication of longi-

tudinal stripes; some specimens show a greyish border at the front margin of the abdominal segments,

which, however, is less perceptible on account of the black pile and the numerous spines. Head sericeous-

white; the lower part of the face prominent, and, like the cheeks, with testaceous reflections ; above and

beneath the vibrisse several other but shorter bristles; on the cheeks a weak black pilosity ; front

d 2

20 DIPTERA.

blackish-grey, in the male narrowed behind; median band piceous ; frontal bristles rather stout, on both

sides descending in a single row to a little below the root of the antennw; beard pale yellow ; pilosity of

the occiput grey; above behind the eyes is a row of short black bristles. Antennz black, the two basal

joints sometimes more piceous in tint; second joint bristly ; third joint in the male twice, in the female

once and a half, as long as the second, broader at the end; arista rather distinctly jointed, thickened

to a little beyond the middle, the distal part showing under a strong lens a microscopical pubescence.

Proboscis shining black. Thorax with long and robust macrochetz ; scutellum with two rows of erect

spines, and at the hind margin with long macrochete lying over the first abdominal segments. Abdomen

with numerous spines, not only at the hind margin but also in the middle of the segments; on the last

segment the spines are placed more irregularly, and round the anus they degenerate into the usual

macrochets. Legs bright ochraceous, the femora testaceous ; cox and femora on the lower part with

long bristles; front tibie outwardly over their entire length fringed with black bristles; the bristles on

the outside of the intermediate and posterior tibiew, and especially those of the former, long and stout;

foot-claws yellow, with black tips, in the male elongated and surrounded by long yellow hairs; in the

female the front tarsi are a little dilated. Tegule brown, with their margin still more obscure in colour.

Wings dark brown, especially along the costa ; small cross-vein placed before the middle of the discal cell ;

both exterior cross-veins curved.

Hab. Costa Rica, Rio Sucio, Cache, Volcan de Irazu 6000 to 7000 feet (fogers).

Several specimens. This species bears a most striking resemblance to Dejeania

pallipes, Macq.; but it is usually smaller in size, and may easily be distinguished by

the absence of the long exserted palpi, by the third joint of the antennz being not

longer than the second (in D. pallipes it is conspicuously longer), the stouter macro-

cheetee on the upper part of the thorax, and by having bristles on the front tibize out-

wardly over their entire length.

9. Saundersia laticornis, sp.n.,¢. (Tab. I. figg. 15; 15a, head in profile ;

15 6, antenna.)

Thorax greyish-yellow ; scutellum rufous, the abdomen black, both densely spinose ; head yellowish ; antenne

and legs rufous, the third joint of the former broad, subtriangular; tegule and base of the wings fulvous.

Length 10 millim. .

Head pale ochraceous; front blackish-grey, narrowed behind, with a narrow brownish-red median band;

frontal bristles descending to a little beneath the root of the antenne; cheeks with a hardly perceptible

pile ; vibrissee surmounted by three or four smaller bristles; beard pale yellow; pilosity of the occiput

more greyish in tint; behind the orbit of the eyes is a row of rather long black hairs. Antenne fulvous;

the entire upper part of the second joint beset with short bristles; third joint once and a half as long

as the second, enlarged towards the end and truncate, thus almost triangular; arista rather distinctly

jointed, gradually tapering and pubescent towards the end. Proboscis sbining black, slender, nearly as

long as the thorax. Thorax covered with a greyish-yellow (in certain lights almost ochraceous) tomentum,

with four distinct longitudinal black stripes, a black pilosity, and long macrochete. Abdomen convex,

black, its entire surface beset with spines. Legs fulvous, with black pile; tarsi slender, the terminal

joint surrounded by black hairs ; claws with black tips. Tegule fulvous. Wings grey, with a slight

reddish tinge, fulvous at the base and at the beginning of the costa; small cross-vein placed just before

the middle of the discal cell; curvature of the fourth vein with an acute angle; apical cross-vein curved

at its base; posterior cross-vein but little curved.

Hab. Costa Rica, Rio Sucio (Rogers).

A single male specimen.

SAUNDERSIA. 21

3. Saundersia macula, (Tab. I. fig. 16.)

Micropalpus macula, Macq. Dipt. Exot. ii. 3, p. 46, t. 5. £. 2°.

Saundersia macula, Schin. Reise d. Novara, Zool. iii., Dipt. p. 834. 180.

Hab. Costa Rica, Rio Sucio (Rogers).—Sours America ! 2.

A single pair, from which I give a fresh description :—

Face and cheeks ochraceous; face vertical, a little prominent at the oral margin; front cinereous, slightly

narrowed behind, in the female broader; median band narrow, brownish-red ; frontal bristles rather

stout, on both sides descending in a single row beneath the root of the antenne; cheeks with a weak

yellow pile; above and beneath the vibrissee are some shorter bristles; beard pale yellow. The two

basal joints of the antenne rufous, the second with a long and several shorter bristles; third joint black,

in the male a little longer than in the female, nearly twice as long as the second, ovate, and broader than

the latter; arista rather distinctly jointed, thickened to beyond the middle, microscopically pubescent.

Proboscis shining black, longer than the head. Thorax with yellowish-cinereous tomentum, four longi-

tudinal black lines (interrupted on the transverse suture), black pile, and long macrochete. Scutellum

black, with long erect spines. Abdomen convex, black; on the front margin of the fourth segment is a

large golden-yellow, well-delineated spot, which in the middle at its hind border extends into a point ;

with the exception of this spot, the whole upper surface is densely beset with spines; the first segments

have, moreover, laterally a black pilosity ; venter with bristly hairs. Legs fulvous; the upper and under-

sides of the front femora and the underside of the hind femora with bristly hairs ; tibie outwardly beset

with. bristles, those of the middle pair longer and stouter; foot-claws and pulviili yellow, in the male

elongated and surrounded by long black hairs, the claws with black tips; front tarsi in the female a little

dilated. Tegule fulvous; a similar coloration at the base and along the basal half of the costa of the wings,

which for the rest are greyish-brown ; small cross-vein placed before the middle of the discal cell; apical

cross-vein incurved at its base; apical cell rather broadly opened ; posterior cross-vein subconvex, placed

on nearly three-quarters of the apical cell. Length 9-5 millim.

4. Saundersia albomaculata. (Tab. I. fig. 17.)

Micropalpus albomaculatus, Jaenn. Neue exot. Dipt. p. 80. 105°

Hab. Muxtco!, Ciudad in Durango 8100 feet (Forrer); Guatemata, Quezaltenango

7800 feet (Champion).

Head pale ochraceous, in some specimens almost golden-yellow; face a little retreating, on the lower part

suddenly, almost conically, projecting; above and beneath the vibrissee some shorter bristles ; beard

and pilosity of the cheeks pale yellow; front a little narrowed behind, laterally with cinereous tomentum,

in the middle with a ferruginous band; frontal bristles in the male descending on both sides in a

double row to a little beneath the root of the antenne; in the female these bristles stouter but less

abundant, and forming a single row, the outer ones being represented by two bristles only. Antenne

rather large, the two basal joints dark ferruginous; third joint black, as long as but broader than the

second and rounded at the tip; arista bare, rather distinctly jointed, gradually tapering beyond the

middle. Proboscis shining black, longer than the head. Thorax with cinereous tomentum, and four

longitudinal black stripes ; pilosity and bristles black. Scutellum reddish-brown, with many erect spines ;

the hind margin with two long macrochsxte, which are directed backward. Abdomen convex, black, with

some blue or violet reflections ; at the front margin of the fourth segment is a large white spot, which is

extended laterally in a border and in the middle behind into a blunt point; with the exception of this spot

the whole upper surface is densely beset with black spines, which also exist on the middle portion of the

venter; the incisions on the venter more or less whitish. Legs testaceous or fulvous; front and middle

cox with short bristles, the hind coxe with a pair of spine-like bristles ; underside “of the femora and

the outside of the tibiee with many bristles, those of the middle tibie the longest ; foot-claws and pulvilli

yellow, as usual in the male longer and surrounded by long hairs, the claws with black tips. Tegule

iw)

DIPTERA.

testaceous. Wings greyish-brown, at the base and the beginning of the costa testaceous ; small cross-vein

placed a little before the middle of the discal cell; apical and posterior cross-veins curved. Length

11 millim.

Several examples of both sexes.:

It seems that there exist in North America still more species, which show, like the

two foregoing, a yellow or white marking on the black abdomen. Williston has

described such a species (from New Mexico) under the name of Saundersia maculata

(Trans. Amer. Ent. Soc. xiii. p. 304): according to his description it differs from

S. macula, Macq., only in its greater size (14 millim.) and in the red scutellum.

Another species is rather doubtfully identified by Williston (d. ¢. p. 303) with Tachina

signifera, Walk. (List Dipt. Brit. Mus. iv. p. 708), and included by him in the genus

Saundersia) ; it is characterized by the black coloration of the base of the femora.

With respect to this identification, however, I am very dubious, for Walker’s description

contains the words “palpi tawny,’ whilst in the other species of this group the

palpi are totally absent. I suppose that Zachina signifera, Walk., belongs either to

the genus Hystricia or to Jurinia, in which similarly-coloured and marked species

occur, as, for example, Hystricia plagiata, Schiner (Reise d. Novara, Zool. iii., Dipt.

p. 332).

5. Saundersia rufopilosa, sp.n. g¢ ¢. (Tab. I. fig. 18.)

Antenne black, with the basal joints dark rufous; thorax cinereous; scutellum and abdomen rufous, the latter

with large black dorsal spots, a dense fulvous pilosity, and black spines; legs fulvous; wings brownish.

Length 12-14 millim.

Head pale ochraceous ; face a little retreating, but prominent again near the oral margin; above the vibrisse

three and beneath several shorter bristles ; cheeks with weak hairs; front narrowed behind, especially in

the male, with a yellowish-brown tomentum, black pile, and a reddish-brown median band; frontal

bristles rather weak, several placed close together near the base of the antenne; in the female the frontal

bristles less numerous but more robust; beard pale yellow; pilosity of the occiput cinereous. Basal

joints of the antenne brownish-rufous, the second joint bristly on the upper part; third joint black, a

little longer than the second, convex on the front side, rounded at the apex; arista rather distinctly

jointed, gradually tapering towards the end and microscopically pubescent. Proboscis shining black.

Thorax yellowish-cinereous, with indistinct longitudinal stripes; pilosity fulvous, in some Specimens more

obscure ; macrochete abundant and long. Scutellum rufous, with two rows of spines; the hind margin

with four long macrochetex, reaching over the first two abdominal segments. Abdomen ferruginous, with

large black dorsal spots, which are sometimes joined together and thus form a broad longitudinal band;

in a few specimens the middle portion of the venter, near the anus, is shining black; the abdomen itself

is clothed with a dense rufous or fulvous pilosity, between which the black spines are very distinct—these

are most abundant on the upper part of the second and third segments, and at the hind margin of the

latter they form a continuous row; on the fourth segment there are only a few spines between the rufous

pilosity ; laterally on the first segment are two spines. Legs fulvous; on the coxee and at the underside

of the femora are some partly yellow and partly black bristles ; front tibize outwardly along their whole

length with short black bristles; posterior tibisze with longer and stouter bristles ; foot-claws and pulvilli

yellow (the claws with black tips), in the male elongated and surrounded by black hairs ; front tarsi in

the female a little dilated. Tegule testaceous. Wings brownish, with the base and the beginning of the

costal region rufous; small cross-vein placed before the middle of the discal cell; apical and posterior,

cross-velns curved,

SAUNDERSIA. 23

Hab. Guatemaa, Purula, San Gerdénimo, Cerro Zunil 4000 to 5000 feet (Champzon) ;

Costa Rica, Rio Sucio, Cache, Volcan de Irazu 7000 feet (Rogers).

Several specimens of both sexes.

At first sight this species offers a striking resemblance to Dejeania corpulenta,

Wiedem., and D. plumitarsis, v. d. Wulp ; but on account of the total absence of the

long straight palpi, there cannot be any doubt that it is a Sawndersia and not a

Dejeania. The spines of the second and third abdominal segments not only exist at the

hind margin, as in the above-mentioned species of Dejeania, but also in the middle.

Two male specimens, one from Rio Sucio and one from Irazu, differ from the others

in their smaller size (10°5 millim.) ; and also in the less dense pilosity of the abdomen,

on account of which the red ground-colour and the black dorsal spots are more conspi-

cuous; moreover, they have the pilosity of the thoracic dorsum blackish, and the basal

joints of the antenne more obscure in tint. As I cannot find any other difference, |

think these specimens are merely a variety of the same species.

6. Saundersia nigropilosa, sp.n., ¢ (2%).

Closely allied to S. rufopilosa and differing as follows :—

The pilosity of the abdomen black and much shorter; the entire surface of the fourth segment, except the

front border, densely beset with spines ; the first segment laterally with several (instead of two) spines ;

the pilosity of the thorax obscure; the hairs and bristles of the coxe and femora, without exception,

black, the bristles round the terminal joints of the tarsi, on the contrary, yellow; the elongate yellow

pulvilli brownish at their truncated extremity.

Length 12-5 millim.

Hab. Muxico, Cordova (Hége); Costa Rica, Rio Sucio (Logers).

The description is taken from a single male specimen from Cordova. ‘Two female

examples from Costa Rica differ from the other in being a little smaller (11 millim.) ;

but show all the above-mentioned characters, with the exception that the black dorsal

spots on the abdomen are less conspicuous and somewhat divided into two. I believe

they are referable to the same species.

7. Saundersia unicolor, sp. n., c.

Black; head yellowish ; thorax on the front side with some grey tomentum ; abdomen densely beset with

spines; antenne and legs black; tegule and wings greyish-brown.

Length 11 millim.

Head pale yellow; front narrowed behind, dark cinereous, only the orbits yellowish; frontal band rutous,

laterally bordered with black ; frontal bristles long, hardly descending beneath the root of the antenne ;

the outward bristles and those on the vertex more robust; face prominent towards the oral margin ;

vibrissee surmounted by some shorter bristles; beard and pilosity of the cheeks and of the occiput

yellowish. Antenne black; second joint with some bristles on the upper part; third joint as long as the

second, rounded at the end. Thorax, scutellum, abdomen, and legs black; on the front side of the

thoracic dorsum some grey tomentum, with longitudinal black lines, of which three in the middle, placed

close together, are the most conspicuous ; abdomen densely beset with spines. Front femora outwardly

with grey tomentum ; the legs with many bristles, which on the outside of the middle tibie are long and

24 . DIPTERA.

stout; foot-claws and pulvilli elongate, yellow, the tip of the claws black. Tegule and wings greyish-

brown ; small cross-vein nearly on the middle of the discal cell ; apical and posterior cross-veins oblique

and a little curved.

Hab. Mexico, Orizaba (H. H. Smith & PF. D. Godman).

A single male specimen, captured in December 1887.

8. Saundersia rufitibia, sp. n., 2.

Black ; head yellowish ; thorax with cinereous tomentum and four black lines; abdomen densely beset with

spines ; antenne and legs black, the tibiee dark rufous; tegule and wings greyish-brown.

Length 11 millim.

Front yellowish-grey, on the vertex as broad as the diameter of the eyes; frontal bristles descending to the

number of three beneath the root of the antenne ; thorax with a dark cinereous tomentum, which covers

the ground-colour, and with four longitudinal black dorsal lines, interrupted at the transverse suture ;

scutellum black; antenne, abdomen, legs, tegule, and wings as in S. unicolor, the knees and tibia,

however, dark rufous ; foot-claws and pulvilli, as usual in the females, short ; the front tarsi, except the

basal joint, a little dilated.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman).

A single female specimen, captured in December 1887. I should have identified this

insect with S. nigriventris, Macq. (Dipt. Exot. ii. 3, p. 44), from Bogota, if the scutellum

of the latter had not been described as testaceous. Macquart originally included this

species in the genus Hystricia (with hairy eyes and fully developed palpi), and his

figure (t. 4. fig. 3a) indeed shows distinct palpi. In Supplement I. of his work,

p- 150, this author, however, transfers the species, on account of its very small palpi,

into the genus Micropalpus (which included at that time also the present genus

Saundersia). Schiner (Reise d. Novara, Zool. iii., Dipt. p. 334. 180) refers it to

Saundersia.

S. rufitibia is nearly allied to S. unicolor, and in most of its characters agrees with

that insect; it is possible that they are the sexes of one and the same species. For the

present, however, I abstain from uniting them, more especially on account of the

striking difference in the colour and development of the thoracic tomentum.

9. Saundersia testacea, sp.n. ¢ (9%). (Tab. II. figg. 1; 1a, the insect from

the side, in order to show the arrangement of the spines.)

Thorax dark cinereous ; scutellum and abdomen testaceous, the latter broad; anus shining black; antenne

and legs black; wings brown.

Length 14-17 millim.

Face a little retreating, notably prominent near the ora. margin, sericeous-white, with grey reflections ; cheeks

similarly coloured and with weak darker hairs ; vibrissee at some distance above the oral margin, accom-

panied by a few shorter bristles ; beard white; front blackish-grey, narrowed behind, with a velvety-

black median band, black hairs, and moderately strong bristles, the bristles descending on both sides in a

single curved row to a little beneath the base of the antenne. Antenne black; the upper part of the

second joint with short bristles; the third joint once and a half as long as the second, elongate-oval ;

arista thickened in its basal half. Thorax blackish, with dark cinereous tomentum and longitudinal

rows of bristles. Scutellum and abdomen yellowish-testaceous ; scutellum with two rows of spines, those

of the posterior row the longest. Abdomen broader than the thorax, with black pile; the sides of the

SAUNDERSIA. 25

first segment with about five, and the hind margins of the following two segments with a continuous row

of spines ; the fourth segment, except its front border, densely beset with spines; the middle portion of

the venter with spines; anus shining black. Legs black; coxe and femora with long black bristly

hairs ; front tibiee outwardly along their entire length with short bristles ; posterior tibie outwardly with

long and stout bristles ; tarsi slender; foot-claws and pulvilli yellow, the claws with black tips. Tegule

and wings rather dark brown; small cross-vein placed a little before the middle of the discal cell; apical

and posterior cross-veins oblique and curved.

Hab. Costa Rica, Rio Sucio, Volcan de Irazu 6000 to 7000 feet (Rogers).

Several male specimens. This species has in its general appearance and coloration

a striking resemblance to Dejeania rutilioides, Jaenn., from which it differs, however,

in the absence of the long palpi, in the unicolorous (not yellowish) lateral and hind

borders of the thorax, and in the absence of black dorsal spots from the abdomen.

A female specimen from San Gerénimo, Guatemala (Champion), may perhaps be the

other sex of S. ¢estacea. It agrees in almost all points with the male examples

described above, but it is larger (19 millim.); the coloration of the scutellum and

abdomen is less obscure and more yellowish; the front is broader; the foot-claws are

smaller and wholly black; and the front tarsi are not dilated.

10. Saundersia cana, sp.n., ¢. (Tab. II. fig. 2.)

Thorax and scutellum shining black; abdomen light grey, with reflecting black spots; antenne and legs

black ; wings dark brown.

Length 13 millim.

Agrees with the foregoing, but the ground-colour of the thorax and scutellum is bluish-black and that of the

abdomen light grey; the first segment, two dorsal and two lateral spots on the second and third segments,

and the anus are black. The spines on the abdomen are placed nearly in the same manner as in S.

testacea ; the row at the hind margin of the second segment is, however, not fully complete but interrupted

on both sides, and, moreover, there exist also bundles of spines on the dorsal spots.

Hab. Costa Rica, Volcan de Irazu 6000 to 7000 feet (Rogers).

A single male specimen. 8. cana might easily be mistaken for Hystricia albiceps,

if attention is not paid to the absence of palpi and to the bare eyes.

11. Saundersia bipartita, sp.n.¢ @. (Tab. II. figg. 3; 3a, head in profile.)

Thorax, antenne, and legs black ; head and abdomen yellow, the latter with the fourth segment black; wings

brownish-grey.

Length 10°5-12 millim.

Head straw-yellow ; face vertical, scarcely prominent at the oral margin ; cheeks with weak blackish hairs;

vibrisse surmounted by some smaller bristles and followed beneath by about six others; beard yellow ;

front narrowed behind, but broader than in the foregoing species, blackish at the sides; median band

narrow, reddish-brown ; in the male the front with long black pilosity and many bristles, the latter descend-

ing irregularly to a little beneath the base of the antenne ; in female the frontal bristles are less numerous

but stouter, and the hairs shorter. Antenne black ; third joint scarcely longer but notably broader than the

second, and rounded at the end; arista rather distinctly jointed at the base, thickened nearly to the end

and there microscopically pubescent. Proboscis shining black, longer than the head. Thorax black, on

the front side with cinereous tomentum and some faintly indicated dark stripes; pilosity black, rather

dense ; bristles abundant. Scutellum piceous, with many spines directed backwards. Abdomen convex,

BIOL. CENTR.-AMER., Dipt., Vol. II., April 18838. €

26 DIPTERA.

straw-yellow, a little transparent, with insignificant black pile; first segment with a black spot under

the scutellum ; fourth segment shining black ; the hind margin of the first segment with some strong

bristles, and the hind margin of the second segment with some spines, the middle ones of which stand

irregularly forward, and the sides with some long macrochwte ; third segment with spines along the

whole hind margin, the middle ones stouter and accompanied by 5 or 6 macrochete; fourth segment

densely beset with spines, as is also the middle portion of the venter ; anus reddish. Legs black ; under-

side of the femora with long black hairs and bristles ; tibie outwardly beset with bristles, those of the

front pair short, and those of the middle pair the longest; foot-claws and pulvilli yellow, in the male

longer and surrounded by black hairs, the claws with black tips; front tarsi of the female a little dilated.

Tegula and wings brownish-grey ; small cross-vein placed on the middle of the discal cell; apical and

posterior cross-veins oblique and curved.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer).

Three male and three female specimens. A fourth male specimen from Cache,

Costa Rica (Rogers), differs from the others in the more rufous coloration of the

abdomen.

S. bicolor, Will. (Trans. Am. Ent. Soc. xiii. p. 304), from New Mexico, Arizona, &c.,

seems to be a closely allied species, but it has yellow side-borders to the thorax and

reddish tibiee.

12. Saundersia truncaticornis, sp.n., ¢. (Tab. II. fig. 4.)

Thorax and scutellum blackish; head and abdomen yellow, the latter with the fourth segment black; cheeks

with a bristle; antennez black, with the basal joints dark rufous ; legs fulvous; wings brown.

Length 10 millim.

Head ochraceous; face perpendicular, prominent at the oral margin; cheeks with weak hairs and a black

bristle ; vibrissce above as well as beneath accompanied by several other bristles; beard pale yellow;

front blackish-grey, scarcely narrowed behind, the median band piceous, almost black; frontal bristles

strong, two or three of them descending beneath the base of the antenna. Antenne black, the two

basal joints somewhat reddish ; third joint a little longer and notably broader than the second, truncated

at the end; arista at the base rather distinctly jointed, gradually tapering towards the end, microscopically

pubescent. Proboscis black, projecting beyond the head. Thorax black, with a dark cinereous

tomentum, the tomentum on the front part more clear and showing the beginning of four longitudinal

black stripes; the surface bearing a rather dense black pile and long macrochete; pleure grey ;

scutellum black, without spines but with macrochete, those at the hind margin longer and more

backwardly directed. Abdomen very convex, transparent straw-yellow ; a spot under the scutellum

and the whole fourth segment black; the first three segments on the upperside very indistinctly separated ;

the black pile scarce, bristly on the upper part; there are two dorsal spines in the middle of the

hind margin of the first segment, a row at the hind margin of the second segment (the two middle ones

stouter), a double row on the third segment, and a great number, mixed with black hairs, on the fourth ;

venter in its middle portion spinose. Legs rufous, with many, though not long, bristles; hind femora at

the underside with black hairs; claws rufous, with black tips; pulvilli pale yellow; front tarsi not

dilated. Tegule and wings rather dark brown; small cross-vein placed before the middle of the discal

cell; apical cross-vein incurved at its base ; posterior cross-vein undulate.

Hab. Panama, Volcan de Chiriqui 3000 feet (Champion).

A single female specimen. S. truncaticornis might easily be mistaken for a small

example of S. bipartita, but it differs in many respects.

SAUNDERSIA.—JURINIA. 27

The following species recorded from Central America are unknown to me:—

Saundersia flavitarsis, Macq. Dipt. Exot. ii. 8, p. 47. 4, t. 5. f. 1; Suppl. 1.

p. 152. 11, t. 18. f. 7, and iii. p. 45 (Micropalpus) ; Schin. Reise d.

Novara, Zool. iii., Dipt. p. 334. 128.—Mexico ; South America.

ornata, Macq. Dipt. Exot. ii. 3, p. 47. 5, t. 4. f. 6 (Micropalpus) ;

Schin. Reise d. Novara, Zool. iii., Dipt. p. 333. 126.—Mexico ;

Colombia.

rufipes, Jaenn. Neue exot. Dipt. p. 79. 104 (Micropalpus).— Panama.

N.B.—The name of this last species ought to be changed on account of the Brazilian

Hystricia rufipes, Macq. (Dipt. Exot. suppl. iv. p. 172. 8); this latter has very short,

hardly perceptible palpi, and therefore probably belongs to the genus Saundersia.

JURINIA.

Jurinia, Robineau-Desvoidy, Essai sur les Myodaires, p. 34 (1830).

This genus is nearly allied to Dejeania, Hystricia, and Saundersia. In the shape

and development of the palpi it closely approaches Hystricia, but differs from it by

the eyes being bare.

_ In the Central-American collection before me there are three species which I have

attempted in vain to recognize from the existing descriptions; they are accordingly

described as new and may be characterized as follows :—

Abdomen yellow, with black extremity. . . . . . + « « dichroma, v. d. Wulp.

Abdomen unicolorous, brownish-red.

Palpi black; wings dark brown . . . - 1 ee es badiiventris, v. d. Wulp.

Palpi fulvous; wings brownish-grey . . . . . . . . adusta, v.d. Wulp.

1. Jurinia dichroma, sp.n., ¢ @. (Tab. II. figg. 5; 5a, head in profile.)

Black, including the antenne and legs; head white; palpi ochraceous ; hind portion of the thorax, scutellum,

and abdomen (except the base and the fourth segment, which are black) yellow; wings brownish.

Length 12-5-14 millim. |

Head white, sericeous; oral margin prominent; front narrowed behind, especially in the male; median band

black or piceous; frontal bristles in the male descending on both sides in a double row to beneath the

base of the antennzy, in the female in a single row, the outward row being represented only by a pair of

strong bristles; cheeks with blackish pile; vibrisssee accompanied above as well as below by some shorter

bristles; beard and hairs of the occiput pale yellow; immediately behind the eyes a row of short black

bristles. Antenne black; second joint on the upper part bristly (in one of the female specimens rufous

at the end); third joint ovate, as long as the second; arista rather distinctly jointed, gradually tapering

towards the apex. Proboscis shining black; palpi pale ochraceous, thickened near the end. Thorax

black, with some grey tomentum, and on the fore part indistinct black stripes, at the hind border and on

both sides under the root of the wings brownish-yellow ; pilosity black; macrochetz moderately robust ;

scutellum and abdomen leather-yellow, dull; scutellum with many bristles and spines; first abdominal

segment black at the base; third segment at the hind margin with two dorsal and two lateral black spots ;

fourth segment, except the front margin, black ; black spines are ranged in rows on the middle and at the

hind margin of the second and third segments, and there are three lateral ones on the third segment, a

great number on the entire surface of the fourth, and some also on the middle of the venter. Legs black ;

bristles moderately long and, at least in the male, not very robust; pulvilli yellow ; claws rufous at the

28 DIPTERA.

base, black at the tip, in the male surrounded by black hairs; front tarsi of the female a little dilated.

Tegule testaceous, almost of the same colour as the abdomen. Wings brownish, more obscure at the base

and along the costa; small cross-vein somewhat infuscated, placed on the middle of the discal cell ; apical

cross-vein incurved on its base ; posterior cross-vein a little curved and inserted on two thirds of the apical cell.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer); Costa Rica, Rio Sucio, Volcan

de Irazu 6000 to 7000 feet (Rogers). .

A male and several female specimens. At first sight this species might easily be

confounded with the above-described Saundersia bipartita ; but, apart from the generic

difference (the perfectly developed palpi), J. dichroma has the third joint of the antenne

shorter and broader; the yellow colour of the abdomen less clear; the scutellum more

yellowish ; the black spot at the base of the abdomen less extended; and the second

and third segments have a double row of spines.

2. Jurinia badiiventris, sp.n..g. (Tab. II. fig. 6.)

Black, including the antenne, palpi, and legs; head whitish; frontal bristles descending in a single row

beneath the root of the antenne; scutellum piceous; abdomen brownish-red ; wings brown.

Length 16:5 millim.

Face and cheeks white, the face porrected at the oral margin, the latter showing a brownish-yellow reflection ;

cheeks with a weak pile; front blackish, narrowed behind, with a black median band; frontal bristles on

both sides descending in a single row beneath the root of the antennz; vibrissa accompanied above as

well as beneath by some shorter bristles; beard white. Antenne and palpi black, of the same shape as

in J. dichroma. Thorax shining black, with a slight bluish tinge, a dark cinereous tomentum, and

some faint indication of stripes; pilosity black; the macrochetz abundant and strong, especially on the

sides; scutellum piceous, densely beset with spines. Abdomen convex, shining, brownish-red (in some

specimens there are traces of a black dorsal band); spines of the second and third segments placed exclu-

sively at the hind margin and of unequal size, those of the fourth segment abundant on the entire surface ;

venter spinose in its middle portion. Legs black, with moderately long and stout bristles; foot-claws

rufous at the base; pulvilli pale yellow. Tegule and wings rather dark brown; small cross-vein placed

if anything a little before the middle of the discal cell; curvature of the fourth vein with an acute angle ;

apical cross-vein incurved at its base; posterior cross-vein faintly curved, nearly on three fourths of the

apical cell.

Hab. Costa Rica, Volcan de Irazu 6000 to 7000 feet (Rogers).

Four male specimens.

3. Jurinia adusta, sp.n.,¢ 2. (Tab. II. fig. 7.)

Blackish; head whitish ; antenne brown or reddish; frontal bristles descending irregularly beneath the root of

the antenne; palpi fulvous; scutellum and abdomen brownish-red; legs piceous; wings brownish-grey.

Length 11-15 millim.

Face and cheeks white; front cinereous, narrowed behind; frontal bristles descending in a double row and

somewhat irregularly beneath the base of the antenne; cheeks with some dark pile; vibrisse accom-

panied by several shorter bristles; beard and pilosity of the occiput pale yellow; above behind the eyes a

row of short black bristles. Antenne piceous, with more or less extended dark red portions, sometimes

nearly wholly reddish; second joint on the upper part bristly; third joint about as long as the second,

ovate, usually blackish at the front side; arista gradually tapering near the apex. Proboscis shining

black; palpi fulvous, thickened and with small black bristles towards the end. Thorax black, with

cinereous tomentum, the front side with four longitudinal black stripes ; macrochete abundant. Scutellum

dark brownish-red, densely beset with spines and at the hind margin with long macrochete. Abdomen

convex, shining, brownish-red, with black pile and robust spines at the hind margin of the second and

JURINIA.—BELVOSIA. 29

third segments; fourth segment on its entire surface, except the front border, with weaker spines;

_ venter spinose in its middle portion. Legs piceous; foot-claws rufous at the base; pulvilli pale yellow ;

in the female the middle joints of the tarsi dilated. Tegule and wings brownish-grey ; at the base of the

wings a dark rufous spot or small cross-band, covering the humeral cross-vein, the beginning of the upper

basal cell, and nearly the whole of the inferior basal cells; small cross-vein thick and faintly shadowed,

placed on or a little before the middle of the discal cell; apical and posterior cross-veins oblique and

curved.

Hab. Mexico, Ventanas in Durango 2000 feet (forrer).

Four male and two female specimens. A third female, from Tepan, Guatemala,

agrees in every respect with the others, but differs in the coloration of the head, this

part being bright ochraceous instead of white; I regard it as a mere variety.

The following species of this genus have been recorded from Central America; they

are all unknown to me :—

Jurinia analis, Macq. Dipt. Exot. ii. 3, p. 39. 1, t. 3. f. 8.—Mexico; Brazil.

lateralis, Macq. loc. cit. p. 42. 8, t. 3. f. 10.—Mexico.

contraria, Walk. List Dipt. Brit. Mus. iv. p. 716.—Mexico.

debitrix, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 296.— Mexico.

innovata, Walk. loc. cit.—Mexico.

—— flavifrons, Jaenn. Neue exot. Dipt. p. 82. 109.—Mexico.

-—— apicalis, Jaenn. loc. cit. p. 82. 110.—Mexico.

barbata, Bigot, Bull. Soc. Ent. Fr. 1887, p. cxl.—Mexico.

gonioides, Bigot, loc. cit.—Mexico.

BELVOSIA.

Belvosia, Robineau-Desvoidy, Essai sur les Myodaires, p. 103 (1830).

In Belvosia, as in the preceding genera, the macrochete of the abdomen have the

appearance of spines; but the general facies of the species belonging to it is, however,

quite different, the head being broader and the terminal joint of the antenne more

elongated. Whilst the foregoing genera are Lchinomyia-like, Belvosia more nearly

resembles some large species of Memorwa or Masicera. From both these latter the

genus is easily distinguished by the spines on the abdomen, and by the vibrisse being

placed at some distance above the oral margin; from Memorea also by the bare eyes

and the longer third antennal joint.

I only know of two species occurring in Central America, B. bifasciata (Fabr.) and

B. leucophrys (Wiedem.). In the former the head is distinctly broader than the thorax,

the facial ridges are very prominent, the abdomen has two whitish cross-bands, and the

wings are dark brown. In the latter the head is about as broad as the thorax, the

abdomen is unicolorous black, and the wings are grey; in this species the hind tibie

on the outside are in both sexes very densely fringed with bristles, a character which

has given occasion to some authors to separate it generically under the name of

Llepharipeza.

30 DIPTERA.

1. Belvosia bifasciata. (Tab. II. figg. 8; 8a, head in profile.)

Musca bifasciata, Fabr. Syst. Ent. p. 777. 19; Ent. Syst. iv. p. 825. 33; Syst. Antl. p. 299. 78.

Ocyptera bifasciata, Latr. Dict. d’Hist. Nat. xxiv. p. 195. 373.

Tachina bifasciata, Wiedem. Aussereur. zweifl. Ins. ii. p. 305. 44’.

Latreillia bifasciata, Rob.-Desv. Essai sur les Myod. p. 104. 1.

Nemorea bifasciata, Macq. Suit. 4 Buffon, Dipt. ii. p. 104. 19; Bigot in Sagra’s Hist. fisica polit.

y nat. de Cuba, vii., Ins. p. 342°.

Belvosia bifasciata, Macq. Dipt. Exot. ii. 3, p. 57. 1, t. 6. f. 2°; van der Wulp, Tijdschr. voor Ent.

XXV1. p. 23. 16%.

Belvoisia bifasciata, Williston, Trans. Am. Ent. Soc. xiii. p. 802’.

Hab. Nortu America? ’, Washington ®, Atlantic States >, Minnesota 5.—GUATEMALA,

San Gerénimo (Champion).—Souta America! ?, Colombia‘, Brazil? +; ANTILLES,

Cuba ?.

Two male specimens have been captured by Mr. Champion in Guatemala.

Following Macquart (Dipt. Exot. ii. 3, p. 56) I formerly identified B. bicincta, Rob.-

Desv. (Essai sur les Myod. p. 103), with B. bifasciata (Fabr.), considering the difference

in the length of the third antennal joint as a mere sexual character. Recently, how-

ever, Williston >, after having examined many specimens of both sexes, treats the two

species as distinct; he refers to B. bicincta, Rob.-Desv., specimens in which the third

antennal joint is shorter (not more than twice the length of the second), the posterior

margin of the third abdominal segment more broadly black, and the last section of the

fourth vein more concave.

The above-mentioned specimens from Guatemala, as well as the South-American

ones in the Royal Museum at Leyden and in my own collection, belong to B. bifasciata

in the sense of Williston.

2. Belvosia leucophrys. (Tab. II. figg. 9; 9a, head in profile.)

Tachina leucophrys, Wiedem. Aussereur. zweifl. Ins. 1. p. 808. 49°.

Blepharipeza leucophrys, Schin. Reise d. Novara, Zool. i., Dipt. p. 386. 189°; Williston, Trans.

Am. Ent. Soc. xiii. p. 304°.

Blepharipeza rufipalpis, Bigot in Sagra’s Hist. fisica polit. y nat. de Cuba, vii., Ins. p. 343°; Macq.

Dipt. Exot. ii. 8, p. 55. 1, t. 6. f. 1°; Suppl. i. p. 158.

Belvosia rufipalpis, van der Wulp, Tijdschr. voor Ent. xxvi. p. 25. 17°.

Hab. Norty America, Connecticut *, Pennsylvania ?.—Mexico 45, Presidio (forrer),

Orizaba (H. H. Smith & F. D. Godman), Medellin near Vera Cruz (i. A. Smith);

Costa Rica, Rio Sucio, Volcan de Irazu 6000 to 7000 feet (Rogers).—SoutH AMERICA %,

Colombia ? ®, Brazil! 2°, Argentine Republic®; ANTILLES, Cuba 4 ®, San Domingo ?.

Several specimens of both sexes. ‘The identification of Blepharipeza rufipalpis,

Macgq., with Zachina leucophrys, Wiedem., has been proved by Schiner, who has com-

pared typical specimens. |

The Central-American examples before me vary considerably in size: the largest

BELVOSIA.—ECHINOMYIA. 31

measure 15 millim. (3) and 13 millim. (2); the smallest 11:5 millim. (¢) and

9 millim.(?). One of the female specimens is labelled “ Tachina breviventris, Wiedem.

(Brit. Mus.)?”; the description of that species, as given by Wiedemann, would indeed

very nearly fit the present insect, if the palpi were not stated to be “black,” whilst in

B. leucophrys they are rufous.

The reasons on which I founded my opinion that the genus Blepharipeza ought not

to be separated from Belvosia are mentioned by me in the ‘Tijdschrift voor Ento-

mologie,’ xxvi. p. 26.

There is still another Central-American species :—

Belvosia trichopus, Bigot, Bull. Soc. Ent. Fr. 1887, p. exl (Blepharipeza).—

Mexico.

ECHINOMYTA.

Echinomya, Duméril, Expos. d’une méthode naturelle pour la classif. et étude des Ins. (1798) ;

Consid. gén. sur la classe des Ins. p. 231 (1823).

As this genus contains several common European species, I regard it as well known.

Though the macrochete of the scutellum and abdomen are fully developed, they have

not the appearance of thick and somewhat blunt spines, as in the preceding genera,

but the more usual form of strong bristle-like hairs. Besides this, Echinomyia is

distinguished from all other “ Tachinine” (except perhaps the genus Cyphocera) by the

antenne, of which the terminal joint is almost always notably shorter than the second.

The Central-American species known to me may be identified by the following

characters :—

1. Cheeks with a pair of bristles; palpi filiform. . . 2.

Cheeks without bristles ; palpi more or less thickened

towards theend. . . . . .. . 2... 8

2. Abdomen blackish, laterally rufous or with a rufous

apex. 2... 6 ee ee we eee we.) robusta, Wieder.

Abdomen yellow, with the terminal segment black . . flaviventris, v. d. Wulp.

3. Thorax and scutellum unicolorous . . . .... 4&

Thorax and scutellum not unicolorous; the scutellum

reddish or testaceous, contrasting with the grey or

black thorax . . 2. . 1. 1. ww ee ee ee

4, Thorax and scutellum covered by a cinereous tomentum ;

terminal segment of the abdomen testaceous ; tegule

yellowish . . . . . . . . analis, Fabr.

Thorax and scutellum black, the thorax only with some

grey tomentum in front ; abdomen unicolorous ; tegulz

black . . . . nigro-calyptrata, v. d. Wulp.

5. Abdomen black, with whitish reflecting spots ; ; ‘palpi but

little thickened near the end. . . . piliventris, v. d. Wulp.

Abdomen shining black, laterally dark rufous ; palpi

notably thickened . . . «©. . . . . 1. . . dispar, v. d. Wulp.

32 DIPTERA.

1. Echinomyia robusta. (Tab. II. fig. 10a, head in profile.)

Tachina robusta, Wiedem. Aussereur. zweifl. Ins. ii. p. 290. 15°.

Echinomyia robusta, van der Wulp, Tijdschr. voor Ent. xxvi. p. 19. 8°.

Echinomyia analis, Macq. Dipt. Exot., Suppl. i. p. 144. 4, t. 12. f 3.

Echinomyia filipalpis, Rond. Arch. per la Zool. iii. (sep. p. 15).

Echinomyia hemorrhoa, van der Wulp, Tijdschr. voor Ent. x. p. 145, t. 4. ff. 18-16°; Williston,

Trans. Am. Ent. Soc. xiii. p. 301+.

Hab. Norta America, Wisconsin ?, White Mountains 4-—Mexico, Ciudad in Durango

8100 feet (Forrer) ; Cosra Rica, Volcan de Irazu 6000 to 7000 feet (Rogers).—CoLomBIa ;

Cuit1; Urvavay, Monte Video!; ARGENTINE REPUBLIC 2.

Several specimens of both sexes. This species varies considerably in the more or

less extension of the rufous portions on the abdomen. This colour generally predomi-

nates in the male specimens, frequently so much so that there remains only a black

dorsal band; on the contrary in the females the abdomen is sometimes wholly black,

except the fourth segment (hemorrhoa, v. d. Wulp). However, there occur also males

with very little, and females with very much red coloration on the abdomen. On

account of this diversity, I believe that all the above-cited descriptions refer to one and

the same species, which seems to be common almost everywhere in North and South

America.

Perhaps Echinomyia filipalpis, Thoms. (Dipt. Eugen. Resa, p. 517), may also be

regarded as synonymous with E. robusta. . The principal difference seems to exist in

the dark colour of the first antennal joint, and in the tibie, the middle portion of the.

latter being rufous, characters which I do not observe in any of my specimens.

Williston 4 considers it as a distinct species, of which he possesses both sexes; he gives

it the new name of E. thomsoni, in order to avoid conflict with EL. filipalpis, Rond.

As synonymous with my EL. hemorrhoa, Williston cites, with doubt, Tachina anaxias,

Walk. (List Dipt. Brit. Mus. iv. p. 726); though this description may agree tolerably

with my insect, I find, however, a serious difficulty in Walker’s expression, “no bristles

on the side of the face,” which is opposed to the fact that genal bristles are present in

E. robusta, Wiedem., and also in my £. hemorrhoa.

2. Echinomyia flaviventris, sp.n. ¢ @. (Tab. II. figg. 11; lla, head in

profile.)

Thorax cinereous; scutellum testaceous; abdomen yellow, with the fourth segment black; head whitish, with

two genal bristles; antenne black, in the middle part rufous; palpi filiform, pale rufous; legs black, with

reddish tibiz ; wings grey, with a yellowish base.

Length 13-16 millim.

Head at least as broad as the thorax, sericeous yellowish-white; cheeks with a long weak blackish pile and

two bristles; front cinereous, with a dark rufous, more or less divided, median band; frontal bristles

strong, descending to the number of three or four in a curved row beneath the root of the antenne ;

vibrisse accompanied above by two and below by a row of shorter bristles; beard and pilosity of the

occiput yellowish-white. Antenne black; the second joint at the end and the third joint at its base

ECHINOMYIA. 83

somewhat reddish ; second joint on the upper part, close to the end, with a rather long bristle; third joint

ovate, a little shorter than the second; arista tapering towards the end. Proboscis shining black, with a

brownish-yellow, hairy tip; palpi pale rufous, filiform, with black pubescence. Thorax with cinereous

tomentum, which on the front side is clearer and shows some traces of blackish stripes; scutellum

brownish-yellow ; the thorax bears a black pile and many bristles, these latter on the sides of the thorax and

at the hind margin of the scutellum being longer and stouter. Abdomen convex, yellow, somewhat trans-

parent, with a short black pile, which, however, does not obscure the ground-colour; first segment at the

base, under the scutellum, black; upon the following segments a faint dorsal rufous stripe; fourth seg-

ment shining black, with a narrow dorsal stripe and the extremity rufous; ati the hind margin of the first

three segments are the following macrochzts—on the first segment one on each side, on the second four

at the dorsal part and two on each side, on the third a contiguous row; the fourth segment is on its whole

surface, with the exception of the front border, densely beset with macrochete; venter also with

macrochete in the middle. Legs black, with black pile; tibie piceous, the hind pair somewhat

reddish ; coxee with many bristles; foot-claws black, the pulvilli pale yellow, in the male elongated and

‘surrounded by black hairs; in the female the front tarsi a little dilated. Tegule and base of the wings

brownish-yellow, the wings for the rest greyish; small cross-vein placed on the middle of the discal cell ;

apical and posterior cross-veins oblique and curved.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer).

A male and four female specimens.

3. Echinomyia analis. (Tab. II. fig. 12 a, head in profile.)

Tachina analis, Fabr. Syst. Antl. p. 311. 11; Wiedem. Aussereur. zweifl. Ins. ii. p. 288. 13°.

Echinomyia analis, Schin. Reise d. Novara, Zool. ii., Dipt. p. 881. 1717.

Hab. Mexico, Presidio (forrer); NicaRacua, Chontales (Janson); Costa Rica, Volcan

de Irazu 6000 to 7000 feet (Rogers).—Soutu America 2, Brazil }.

Four male and three female specimens.

4, Echinomyia nigro-calyptrata, sp. n., 2.

Black ; head yellowish ; basal joints of the antenne rufous; palpi ochraceous; front portion of the thorax with

some grey tomentum and black stripes; tegule blackish; wings dark grey.

Length 14 millim.

Head sericeous, pale yellow; front partly cinereous; frontal band rufous, black behind, bordered with

yellowish hairs; frontal bristles descending in a curved row, to the number of three, beneath the root of

the antenne ; cheeks without bristles; vibrissee accompanied by some shorter bristles; beard and pilosity

of the occiput yellowish. Basal joints of the antenne rufous; second joint on the upper part with short

bristles; third joint black, shorter than the second, very convex on the front side. Proboscis shining

black ; palpi ochraceous, thickened towards the end, with short black hairs. Thorax and scutellum black,

with a slight bluish tinge; thoracic dorsum before the transverse suture with some grey tomentum and

several black stripes; pleure cinereous, with yellowish pile. Abdomen unicolorous black, with black

hairs ; macrochetee rather strong—two, dorsal, on the hind margin of the second segment, a row on the

hind margin of the third segment, and several, irregularly placed, on the fourth segment. Legs black,

outside of the front femora greyish; the legs with many bristles, those of the front femora and tibie

regularly ranged, those of the outside of the middle tibia long and robust ; foot-claws and pulvilli long;

the claws black with a somewhat rufous base, the pulvilli reddish-yellow. Tegule blackish. Wings dark

grey; small cross-vein on the middle of the discal cell; apical and posterior cross-veins oblique and

curved.

Hab. Mexico, Medellin near Vera Cruz (H. H. Smith).

A single male specimen, captured in January 1888.

BIOL. CENTR.-AMER., Dipt., Vol. II., April 1888. f

34 | DIPTERA.

5. Echinomyia piliventris. (Tab. II. fig. 13 @, head in profile.)

Echinomyia piliventris, van der Wulp, Tijdschr. voor Ent. Xxvi. p. 22. 13°.

Hab. Mzxico, Presidio (Forrer).—ARGENTINE REPUBLIC '.

A single male specimen.

6. Echinomyia dispar, sp.n.¢ 9. (Tab. II. fig. 14, head in profile.)

Thorax cinereous; scutellum rufous; abdomen shining black, laterally rufous; head whitish, the front

brownish; frontal band and the basal joints of the antenne rufous, the third joint of the latter and the

legs black; base of the wings yellowish.

Length 11 millim.

Head yellowish-white; front greyish-brown, with a ferruginous median band; beard and pilosity of the

occiput pale yellow. Antenne ferruginous; third joint, except the extreme base, black; second joint on

the upper part with several bristles; third joint about as long as the second, but broader, convex on

the front side, straight behind; arista thickened for two thirds of its length. Proboscis shining black ;

palpi fulvous, thick, especially towards the end. Thorax with cinereous tomentum and four longitudinal

black lines; scutellum rufous, with greyish tomentum. Abdomen cordiform, convex, shining black,

laterally with a more or less rufous extension. Legs black; hind tibie with many bristles ; at the under-

side of the basal joints of the hind tarsi a thick and short, reddish pile; foot-claws black, the pulvilli

yellow, in the male but little elongated, in the female very short; front tarsi in the female not dilated.

Tegule whitish; wings grey, at the base and at the beginning of the costa yellowish; veins in the

yellowish portion rufous, for the rest black; small cross-vein placed on the middle of the discal cell;

posterior cross-vein a little curved.

Hab. Mexico, Northern Sonora (Morrison).

A male and two female specimens.

The following species are also recorded from Central America :—

Echinomyia cora, Bigot, Bull. Soc. Ent. Fr. 1887, p. cxl.—Mexico.

macrocera, Bigot, loc. cit. p. cxl.—Mexico.

notata, Bigot, loc. cit. p. exli—Mexico.

MICROPALPUS.

Micropalpus, Macquart, Suit. & Buffon, Dipt. 11. p. 80 (1835).

1. Micropalpus fulgens.

Tachina fulgens, Meig. Syst. Beschr. iv. p. 259. 34, t. 41. f. 23,

Micropalpus fulgens, Macq. Suit. 4 Buffon, Dipt. 1. p. 88. 30; Schiner, Faun. Austr., Dipt. i. p. 428.

Linnemyia heraclei, Rob.-Desv. Essai sur les Myod. p. 53. 3.

Micropalpus heraclei, Macq. Suit. & Buff., Dipt. i. p. 81. 3.

Linnemyia analis, Rob.-Desv. Essai sur les Myod. p. 54. 4.

Micropalpus analis, Macq. Suit. & Buff., Dipt. 1. p. 82. 4.

Linnemyia borealis, Rob.-Desv. Essai sur les Myod. p. 54. 6.

Micropalpus borealis, Macq. Suit. & Buff., Dipt. i. p. 82. 5.

Linnemyia estivalis, Rob.-Desv. Essai sur les Myod. p. 54. 7.

Linnemyjia distincta, Rob.-Desv. 1. c. p. 54, 57.

Micropalpus comptus, Rond. Prodrom. Dipt. Ital. iii. p. 70. 7.

Hab. Nortu America!,—Mexico, Presidio, Ciudad in Durango 8100 feet (forrer).—

EUROPE.

MICROPALPUS.—TRICHOPHORA. 35

The Central-American collections before me contain one female and five male

specimens. On comparing these with European examples I cannot find any essential

difference between them, except that some of the former show a slight transition to a

rufous coloration of the tibiee and of the basal joints of the antenne. This agrees with

the indications of Robineau-Desvoidy respecting his Linnemyia distincta, which was

from Philadelphia.

TRICHOPHORA.

Trichophora, Macquart, Dipt. Exot., Suppl. ii. p. 62 (1847).

Macquart has characterized Trichophora as follows :—‘‘ Proboscis reaching beyond the head, slender, and bent

downwards; terminal lips small and rather indistinct. Palpi very short or absent. Face bare, the

epistoma projecting; a strong bristle on the interior and inferior borders of the eyes. Front rather

broad (2); bristles descending to the lower third of the face, three beneath the base of the antenne.

Antenne inclined; the second joint rather elongate (the third broken off). Eyes bare. Abdomen oblong,

very short ; bristles on the middle of the segments ; oviduct terminated by a crown of bristles.”

This genus is so nearly allied to Cyphocera, Macq. (Ann. Soc. Ent. Fr. ii. 3, p. 267),

that I almost hesitate to assign the three following species either to Cyphocera or

to Trichophora.

Schiner (Reise d. Novara, Zool. iii., Dipt. p. 330), on account of Trichophora analis,

and after having described two exotic species of Cyphocera, calls Trichophora a well-

marked genus; but he does not mention the characters by which the two genera may

be distinguished from each other. All the species of Cyphocera, as well as those of

Trichophora, have one or more genal bristles, and the palpi absent, or at least

rudimentary.

Having no typical specimens of these genera at my disposal, I can only establish

my opinion upon the descriptions. The type of Cyphocera (C. ruficornis, Macq.) has

Echinomyia-like antenne (the third joint shorter than the second), and this is not the

case in any of the species before me. Truly Macquart makes no mention (in his

description of the genus Trichophora) of the relative length of the antennal joints,

because the third joint was broken off in his unique specimen; but in none of my

species is the third joint shorter than the second. Consequently they cannot be

included in the genus Cyphocera, and I may be correct when I place them in the

genus T'richophora,

Trichophora has hitherto contained but two species—T. nigra, Macq. (Dipt. Exot.,

Suppl. ii. p. 63. 1, t. 3. f 7), from Brazil, and J. analis, Schin. (Reise d. Novara, Zool.

iii., Dipt. p. 330. 115), from South America, both having a dark coloration, with black

or piceous legs. One of the following new species, 7’. rufina, has a quite different

coloration, being rufous with similarly coloured antenne and legs; but it agrees with

the two above-mentioned insects in having macrochete on the middle of the second

and third abdominal segments. 7. ¢risetosa and T. nitidifrons have no discal macro-

cheete on the second and third segments; the former has three genal bristles.

The characters of the genus 7richophora, as they are established by Macquart, ought

6 DIPTERA.

fa)

to be emended and modified thus:—Third joint of the antenne as long as or a little

longer than the second; one or more genal bristles; macrochete of the second and

third abdominal segments at the hind margin only, or at the hind margin and in the

middle *.

In the collections before me I find the three following undescribed species :—

1. Macrochetz of the second and third abdominal segments

in the middle as well as on the hind margin; rufous

species. . . . . .

re rufina, v. d. Wulp.

Macrochete of the second and third abdominal segments

only on the hind margin ; black-coloured species, with

black legs 2 2 1 ee ee ee ee

2. Three genal bristles 2. O°. 6 6 ee ee. brisetosa, v. d. Wulp.

Only one genal bristle . ©. . - - ee ee ee nitidifrons, v. d. Wulp.

1. Trichophora rufina, sp.n.,¢ @. (Tab. II. figg. 15; 15 a, head in profile.)

Rufous, including the antenne and legs; a single genal bristle ; macrocheete on the middle of the second and

third abdominal segments; bristles of the legs rufous; wings yellowish at the base and along the basal

part of the costa.

Length 8°5 millim.

Face perpendicular, a little prominent at the oral margin, in the male pale yellow, in the female bright

ochraceous; cheeks without pile, but with a single bristle; above the vibrissee one shorter bristle, and

beneath them four bristles; pilosity of the occiput yellowish: front rather broad, with a ferruginous

median band, which is narrowed behind; frontal bristles forming on both sides a single row, and scarcely

descending beneath the base of the antennw. Eyes bare. Antenne fulvous; second joint on the upper

part with some bristles ; third joint as long as the second, but broader and truncate at the end (in the .

female specimen it is infuscated at the extremity); arista black, indistinctly jointed, thickened nearly to

the end. Thorax yellowish-cinereous () or ochraceous (2), with four black stripes placed at equal

distances, the exterior ones somewhat broader; scutellum of the same colour as the thorax; macrocheete

of the thorax abundant, four longer and stouter ones at the hind margin of the scutellum. Abdomen

scarcely longer than the thorax, fulvous, more or less transparent ; in the male the fourth segment, with

the exception of the front border, is black; in the female this black colour is confined to the anus, but

somewhat extended in a dorsal stripe; on the second segment two macrochete in the middle, two on the

hind margin, two on each side; on the third segment two in the middle, two on each side, and an entire

row at the hind margin; fourth segment with many macrochate. Legs fulvous, the last four joints of

the tarsi brownish or even dark brown; bristles rufous, short on the front tibie, very long and stout on

the outside and at the end of the middle tibia. Tegule fulvous; wings cinereous, brownish-yellow at the

base and at the beginning of the costa; small cross-vein placed if anything a little before the middle of

the discal cell; apical and posterior cross-veins slightly curved.

Hab. Guatemaua, Cahabon (Champion); Costa Rica, Cache (Rogers).

A female specimen from the former, a male from the latter locality.

2. Trichophora trisetosa, sp.n.,2. (Tab. II. figg. 16; 16, head in profile.)

Shining black, the fourth abdominal segment rufous; thorax cinereous, with four black stripes; head white ;.

* In this sense the North-American species described by me under the name of Schineria ruficauda (Tijdschr.

voor Ent. x. p. 146. 18) is a Trichophora, and not a Cyphocera, to which genus it is referred by Léw and

Osten Sacken.

TRICHOPHORA. 37

three genal bristles; antennz black, the basal joints dark rufous; macrochete of the second and third

abdominal segments only at the hind margin; legs black.

Length 9-5 millim.

Face nearly vertical, prominent at the oral margin; cheeks without pile, but with three bristles in a perpen-

dicular row; vibrisse accompanied by some shorter bristles; beard and pilosity of the ocviput pale yellow;

behind the posterior orbit of the eyes a row of short black bristles; front broad, laterally blackish ; median

band reddish-brown ; frontal bristles descending on each side in a curved row as far as the end of the second

joint of the antennw ; external to these bristles three macrochextsw. Antenne black, the two basal joints

dark rufous; second joint on the upper part with a long and some shorter bristles; third joint a little

ionger and broader than the second, rounded at the end; arista rather distinctly jointed, thickened to

beyond the middle. Thorax and scutellum shining black, but with a cinereous tomentum, which is more

compact in front of the thorax, and there shows four black stripes, the exterior stripes broader and in the

form of spots; pleurse with light grey tomentum. Abdomen ovate, shining black; the last segment

rufous, with cinereous reflections; macrochetz of the second and third segments only at the hind margin.

Legs black, the front femora outwardly with grey tomentum; the middle joints of the front tarsi subdi-

lated; bristles as in 7’. rufina, but of a black colour. Tegule whitish. Wings cinereous ; small cross-vein

placed on the middle of the discal cell; curvature of the fourth vein with a right angle; apical cross-vein

straight ; posterior cross-vein scarcely curved.

Hab. Costa Rica, Cache (fogers).

A single female specimen.

3. Trichophora nitidifrons, sp. n., ¢ (and ¢ 2).

Shining black; thorax partly with grey tomentum ; head whitish; front laterally shining black, with a rufous

median band; one genal bristle; antenn rufous, the third joint more or less blackish; abdomen at the

sides and at the apex with a rufous tinge ; macrochete of the second and third segments only at the hind

margin ; wings dark grey, brownish-yellow along the costa.

Length 9 millim.

Head in profile nearly quadrate; face and cheeks yellowish-white, almost silvery ; a rather strong bristle on

the cheeks close to the lower part of the eyes; front as broad as the diameter of the eyes, on both sides

shining black, but anteriorly of the same silvery-white colour as the face; frontal band rufous, narrowed

and more obscure towards the vertex; frontal bristles somewhat irregularly descending beneath the root of

the antenne; vibrisse robust, at some distance above the oral margin, and accompanied by a few shorter

bristles; occiput metallic black, with yellowish pile, and a row of short black bristles behind the eyes.

Antenne large, rufous; first joint erect ; second joint double as long as the first, broader towards the end,

with some short bristles on the upper part; third joint a little longer than the second, very broad and

subquadrate at the end, on the front side with a black margin (one specimen), almost wholly black (the

other specimen); arista black, distinctly jointed, thickened to near the end. Proboscis shining black.

Thorax and scutellum shining black; thorax on the front side with greyish-white tomentum and four .

black stripes; laterally this tomentum forms a band, which extends to the root of the wings ; pleure and

voxe cinereous. Abdomen cylindrical, shining black or piceous, black-haired, laterally with a rufous tinge

and whitish reflecting spots; apical segment dark rufous; macrochete on the hind borders of the second

and third segments (there are no discal ones). Legs black, elongate, but robust, with rather stout bristles,

especially those on the outside of the middle tibie; foot-claws and pulvilli slightly elongate, the former

black, the latter yellow. Tegule whitish. Wings dark grey, along the costa brownish-yellow ; all the

cross-veins somewhat bordered with brown; small cross-vein on the middle of the discal cell; apical

cross-vein slightly curved, less oblique than the posterior cross-vein, the latter almost straight; apical cell

narrowly open at a notable distance from the apex of the wing.

Hab. Mexico, Medellin near Vera Cruz (H. H. Smith).

Two male specimens, captured in January 1888.

38 DIPTERA.

This species is of a more elongate and cylindrical form than the two foregoing. I

regard as the female of this insect a specimen taken in Mexico (Orizaba) in December

1887 by Messrs. H. H. Smith and F. D. Godman. This example is smaller (7 millim.

only), and of a more metallic colour; the arista is more slender; the abdomen is less

cylindrical and without reddish tinge at the sides, the last segment, however, being

rufous; and the claws and pulvilli are very short. In all other characters it agrees

with the above-mentioned male specimens.

GYMNOMMA, gen. nov.*

Agrees in most points with Micropalpus ; but differs in having the eyes bare, a less elongated abdomen, the

macrochete absent from the middle of the second and third abdominal segments, and the fourth vein not

prolonged beyond its point of curvature. The antenne are broader towards the end, the second joint is rather

elongated, the third joint is twice as long as the second, and the arista is distinctly jointed. Vibrissee at

some distance above the oral margin. Proboscis moderately long; palpi absent, or at least not perceptible.

Abdomen ovate ; the first segment abbreviated. Apical cell notably before the tip of the wing; posterior

cross-vein on more than two thirds of the apical cell.

1. Gymnomma nitidiventris, sp.n. 9. (Tab. M-figg. 17; 17a, head in

profile.)

Yellowish-cinereous; head white; abdomen shining black; antenns and frontal band rufous; legs black ;

wings greyish.

Length 9°5 millim.

Head sericeous-white, with grey reflections; face perpendicular, a little prominent at the oral margin; above

the vibrisse two and under them several shorter bristles; beard white; front broader than the eyes;

median band ferruginous, as broad as the sides; frontal bristles robust, three of them descending beneath

the base of the antenne, and two placed laterally near the orbits of the eyes; on the cheeks a row of

weak hairs. Antenne rufous; second joint enlarged towards the end, on the upper part with rather long

bristles; third joint twice as long as the second, and broader, infuscated towards the end ; arista thickened

to beyond the middle. Thorax and scutellum yellowish-cinereous ; thoracic dorsum with four black stripes,

which, however, are not very distinct; pleure blackish; macrochete abundant and stout. Abdomen

shining black; fourth segment laterally with white reflections; the macrochete placed thus:—four at —

the hind margin of the second segment (two dorsal and one on each side), six at the hind margin of the

third segment, and several on the fourth segment. Legs black; front femora with a row of bristles on

the upperside as well as on the underside; posterior femora only with a row on the underside and two

bristles close together above near the apex; tibiee outwardly with many bristles, those on the front pair

shorter. Tegule yellowish-white. Wings grey, at the base a little infuscated ; small cross-vein placed

on the middle of the discal cell; curvature of the fourth vein with an acute angle; apical cross-vein

incurved at the base; posterior cross-vein scarcely bent outwards.

Hab. Mexico, Ciudad in Durango 8100 feet (Lorrer).

A single female specimen.

NEMOCHAETA, gen. nov.f

General facies of Micropalpus, but with fully developed and even robust palpi. Eyes bare. Front rather

prominent, broader in the female; frontal bristles strong, descending on both sides in a double row, and

somewhat irregularly, beneath the root of the antenne. Face retracted; the oral margin a little

* yupvos, bare; dupa, eye. + vépw, divide; xairn, bristle.

\ NEMOCHATA.—GONTA. 39

porrected ; facial ridges without bristles; cheeks broad, with some weak pile. Antenne obliquely

projecting; second joint elongate; third joint a little longer and broader than the second, convex on the

front side; arista distinctly articulated. Palpi enlarged towards the end. Macrochete of the scutellum

long, and reaching over the first two abdominal segments. Abdomen elongate-oval, convex; first

segment abbreviated ; macrochetee of the second and third segments only at the hind margin; genitalia

of the male conspicuous. Legs moderately long; foot-claws and pulvilli elongated in the male. Wings

without costal spine; apical cell narrowly opened at a short distance from the tip; curvature of the fourth

vein with an acute angle, the vein apparently prolonged by means of a fold on the surface; posterior

cross-vein on two-thirds of the apical cell.

From Schineria, Rond., and Demoticus, Macq., which also have a distinctly jointed

arista, this new genus differs by the macrochete being absent from the middle of the

second and third abdominal segments. Moreover, it is distinguished from Schineria by

the open apical cell, and by the small cross-vein being placed at a greater distance from

the curvature of the fourth vein; and from Demoticus by the wings not having a costal

spine.

1. Nemocheta dissimilis, sp. n.,¢ 9. (Tab. %& figg. 18,3; 18a, head in

profile. )

Shining bluish-black; in the male the abdomen laterally rufous; head ochraceous; palpi fulvous; antenne

(except the basal joints, which are rufous) and legs black; wings grey, with yellow base,

Length 9 millim.

Head sericeous, pale ochraceous; front more obscure, in the male as broad as, in the female broader than, the

eyes; median band narrow, piceous; beard and pilosity of the occiput yellowish. Antenne black, the

basal joints more or less rufous; second joint bristly on the upper part. Proboscis black. Palpi fulvous.

Thorax, scutellum, and abdomen shining bluish-black ; in the male the sides of the first three segments of

the latter (and the central portion of the venter also) are broadly fulvous, somewhat transparent ; in the

female the abdomen is unicolorous, black. Legs black. Tegule and the extreme base of the wings

yellow, the wings for the rest with a grey tinge; small cross-vein placed on the middle of the discal

cell; apical and posterior cross-veins scarcely curved.

Hab. Costa Rica, Cache (Hogers).

A male and a female specimen.

GONTA.

Gonia, Meigen, Iliger’s Mag. li. p. 280 (1803).

1. Gonia pallens.

Gonia pallens, Wiedem. Aussereur. zweifl. Ins. ii. p. 346. 6'; Macq. Dipt. Exot. ii. 8, p. 50. 4’;

Arribélzaga, An. Soc. Cient. Argent. x. p. vill (1880 35 van der Wulp Tijdschr. voor Ent.

XXVi. p. 23. 15%. Wrong, WoT ¢

Gonia chilensis, Macq. Dipt. Exot. 11. 3, p. 50. 5, t. 5. fig. 4°; Blanch. in Gay’s Historia fisica y

polit. de Chile, Zool. vii. p. 422, Atlas, t. 4. fig. 20°.

Gonia angusta, Macq. Dipt. Exot. ii. 3, p.51. 7, t. 5. fig. 5; Walk. List Dipt. Brit. Mus. iv. p. 798.

Gonia lineata, Macq. Dipt. Exot., Suppl. iv. p. 178. 15.

Hab. Mexico, Ventanas in Durango 2000 feet (Forrer).— Braziu12; Curii® §;

ARGENTINE ReEpuBLIC? 4; Patagonta; ANTILLES, Cuba®, Jamaica.

A single female specimen has been captured by Mr. Forrer in N. Mexico.

40 | DIPTERA. _-

2, Gonia mexicana, sp. n.,g 9. (Tab. WV. figg. 19,6; 194, head; 196, hind

leg; 20,9; 20a, head.) |

Head pale rufous, with cinereous tomentum ; thorax black ; scutellum testaceous ; abdomen in the male rufous,

with a black dorsal stripe, in the female black, with two large lateral rufous spots; antenne and legs

black ; tegule whitish; wings nearly hyaline, pale rufous at the base.

Length 11-12 millim.

In general appearance agreeing with the European G. divisa, Meig. The head of a paler colour and having

more cinereous reflections, between which a clear ferruginous frontal band is more perceptible. Antenne

black, the basal joints, however, being more or less rufous; in the male the third joint is four to five, in

the female two or three, times as long as the second; the penultimate and terminal joints of the arista are

of equal length. The cinereous tomentum on the thorax is not dense enough to alter the black ground-

colour; of longitudinal stripes only faint traces are to be seen; the hind borders of the thorax, and in the

male also the shoulders and the sides, are somewhat rufous. Abdomen ovate; in the male a little

elongate, reddish-yellow, with a narrow dorsal black stripe, which is somewhat interrupted at the

incisions, these having a whitish reflection; in the female black, with two large lateral rufous spots,

the spots occupying the hind ‘portion of the first segment, the whole of the second segment, and the

front border of the third segment in such a manner that a dorsal band is formed. Macrochete of the

second and third segments only at the hind margin. Legs black; the front and hind tibis on the outside

fringed with short bristles, the latter also with some longer bristles in the middle and at the end; the

outer bristles of the middle tibiz long and stout.

Hab. Mexico, Ciudad in Durango 8100 feet (forrer).

Two specimens, a male and a female.

GYMNOCH ATA.

Gymnocheta, Robineau-Desvoidy, Essai sur les Myodaires, p. 371 (1880).

1. Gymnocheta reinwardti.

Tachina reinwardtii, Wiedem. Aussereur. zweifl. Ins. ii. p. 315. 62°.

Had. Guatemata, Lanquin in Vera Paz (Champion).—Braziu!.

A single male specimen, agreeing in its principal characters with Wiedemann’s

description!, "Wiedemann calls the face, the occiput, and the orbits of the eyes

“ snow-white,” the oral margin “ ferruginous,” and the front “black.” In the Guate-

malan specimen the head is not so purely white, and beneath (as also at the oral

margin) inclines to yellow; at the sides of the front the metallic green ground-colour

shines through the greyish-black tomentum; the median band is narrow, especially

posteriorly, black, but just above the antenne slightly testaceous; frontal bristles

abundant, descending on both sides in a single row, to the number of five or six

beneath the root of the antenne. Hyes densely clothed with greyish-yellow pile.

Macrochete in the middle as well as on the hind margin of the second and third

abdominal segments. Legs black; the front femora outwardly with white tomentum

(Wiedemann calls the femora “dark green”). Wings without a costal spine; fourth

vein not prolonged at its point of curvature; small cross-vein placed a little before the

middle of the discal cell; posterior cross-vein faintly curved.

TACHININ. 41

Since the publication of the first part of this volume, I have received from the

editors new collections, containing a large number of species which were not repre-

sented in the preceding. Moreover, Professor Bellardi of Turin has been kind enough

to send me the Mexican Tachinine in his possession. The examination of all these

collections has enabled me to add several new species to the genera already treated :

they will be published afterwards in a Supplement. There are also many species which

must be included in genera not hitherto known as belonging to the Central-American

fauna, or which require new genera for their reception. It is therefore necessary to

give here a revision of the Synoptical Table published on pp. 5-7; the portion appearing

on p. 5, referring to the first six genera, does not, however, require any alteration.

Synoptic Table of the genera of Tachinine belonging to the Central-American fauna *.

Third joint of the antenne as long as or longer than the

second. . ..... . . . 7.

7. First posterior (apical) cell ending distinctly before the apex

ofthe wing . . 2... 1 1 ee eee ee we 8B

First posterior (apical) cell ending at or very near the apex

of the wing, or closed and sometimes petiolated . . . . 28.

8. Palpi rudimentary or absent . . . . 2... 2 ew ee OD

Palpi fully developed. . . . . . «. - .. . Ld. + |

9. Eyes hairy ; fourth vein prolonged at its point of curvature . Micropalpus, Macq. oe

Eyes bare; fourth vein not prolonged at its point of curvature 10. - AT 6

10. Cheeks with one or more bristles. . . . . . . . . . Trichophora, Macq. a)

Cheeks without bristles. . . . 2. 2. 2. 2. 1 « - « « Gymnomma, v. d. Wulp. 48

ll. Arista distinctly jomtedt . . . 2... . 12.

Arista not jointed, or, at most, with a scarcely visible joint: at

the extreme base . . . .. . . an 16.

12. Antenne short and broad; third joint as long as s the second,

or but little longer (facies Echinomyia-like) . . . . . Nemochata,v.d. Wulp. 7. °%

Antenne slender and mostly long; third joint two to four ve

times as long as the second (facies not Echinomyia-like) . 138.

13. Head, and especially the front, very swollen; frontal bristles

weak, but numerous and irregularly spread ; arista distinctly .

nicked. ©. 1 ee ee eee ee ee wee Gonia, Meig. 7% |

* Except the genera in which the scutellum and abdomen are spinose; and the genus Echinomyia, in

which the third antennal joint is shorter than the second (Nos. 1-6 of the former Synoptic Table).

+ Some species of Nemorea have the arista not distinctly jointed; and these having hairy eyes, like the

others of the genus, apparently come under the numbers 17-20. I therefore note here, that they may be

distinguished from Gymnochia by their coloration, which is not metallic green or blue ; from Mystacella and

Meigenia by having the vibrisse less removed from the oral margin; from Exorista by the shorter antenne

(the third joint not more than twice as long as the second); and from Phorocera by the absence of bristles on

the facial ridges.

BIOL. CENTR.-AMER., Dipt., Vol. II., January 1890. g

14.

15.

16.

17.

18.

19.

20.

22.

23.

24.

20.

DIPTERA.

Head not swollen; frontal bristles arranged in one or more

rows on each side of the frontal band .

Facial ridges with a row of bristles (eyes pilose, at least in

the male) . toe ee woe ee . .

Facial ridges without, or, at most, with some scattered, bristles .

Frontal bristles on each side in two or three rows; eyes bare

Frontal bristles on each side in a single row; eyes pilose .

Eyes hairy *

Eyes bare Loe ee Loe

Metallic green species; antennz rather short

Grey or black, seldom fulvous or partly fulvous species (in a

few species of the genus Mystacella, the abdomen with a

tendency to metallic coloration) ; antennz rather long .

Vibrissz inserted at some distance above the oral margin .

Vibrisse inserted just at the oral margin . .

Curvation of the fourth vein with a rectangle ; apical cross-

vein usually concave ; abdomen ovate .

Curvation of the fourth vein with a blunt angle; apical cross-

vein straight ; abdomen conical . . .

Facial ridges without bristles (sometimes with a few bristles

immediately above the vibrissz)

Facial ridges with a row of bristles

. Antenne very short .

Antenne elongate, often nearly as long as the face . .

Cheeks as broad as the rongituinar diameter of the eyes ;

macrochete as usual . . Se

Cheeks narrow, the eyes descending to near the inferior part

of the head ; macrocheete very short and weak

Facial ridges without bristles (sometimes with a few bristles

placed at a considerable distance from each other, or some

immediately above the vibrissz) .

Facial ridges with a row of bristles extending up half the face

Vibrissze inserted at some distance above the oral margin

Vibrissz inserted quite at the oral margin . .

Second joint of the antenne rather elongate, the third, at

most, twice as long as the second; some veins of the wings

bristly ; fourth vein prolonged at its point of curvature; the

apical and especially the posterior cross-vein very oblique .

Second joint of the antenne very short, the third more than

14.

Distichona, v. d. Wulp. Lf UY :

15. _

Cnephalia, Rond. US

Nemorea, Rob.-Desv. 1’

17.

21.

Gymnocheta, Rob.-Desv.

18.

19.

20.

Mystacella, v. d. Wulp. 3]

Meigenia, Rob.-Desv.4 8

Ezxorista, Meig. 60

Phorocera, Meig. ‘75~

22.

23.

Tria, Meig. 87

Miltogramma, Meig. as

24.

26.

Grachiycona, Rond. Jo

25.

Plagia, Meig. /0/

* The genus Plagia is ranged here under No. 21; most of its species have the eyes bare, but a few of them

(including one belonging to the Central-American fauna) have the eyes thinly pilose.

Plagia, however, may

be distinguished from all the other genera of the group by the short bristles on some of the longitudinal veins,

and by the peculiar oblique position of the posterior cross-vein.

26.

27.

29.

30.

3l.

32.

33.

84.

35.

36.

37.

38.

TACHININA.

twice as long as the second; veins not bristly ; fourth vein

not prolonged at its point of curvature; cross-veins not

more oblique than usual . woe ek .

Fourth vein prolonged at its point of curvature ; front very

prominent. . .. . oe .

Fourth vein not prolonged at its point of curvature ; front

little prominent. . . . ee + soe

Eyes proportionally small ; arista thickened for nearly its

entire length . .

Eyes large, descending to 3 near the underside of the head ;

arista usually thickened on its proximal half only

. Proboscis long and slender, its apical half turned backward .

Proboscis of usual shape woe .

Arista distinctly jointed ; some of the veins with a row of

bristles. .C)2" vTetg Wy PIEK Spy)

Arista not visibly jointed ; 3 veins not bristly

Scutellum and abdomen very densely beset with macrochzte ;

eyes hairy . . . .

Scutellum and abdomen with normal, regularly arranged

macrocheetz ; eyes usually bare (only in the genera Mac-

quartia and Didyma pilose) . .

Abdomen elongate-conical or cylindrical ; tarsi of ‘the front

legs usually notably longer than the tibie .

Abdomen short-conical, ovate or rounded ; tarsi as long as

the tibize or shorter.

Eyes hairy .

Eyes bare . woe

Antenne much shorter than the face ;

long as the second . .

Antenne nearly as long as the face third joint three or more

times longer than the second

Wings scarcely longer than the abdomen, broad and rounded

at the tip ; black species (in female the anus furcate)

Wings notably longer than the abdomen, rather narrow ;

mostly rufous or yellowish species .

Front as broad as the eyes; third antennal joint broad, con-

vex on the front side ; abdomen cylindrical . .

Front narrower than the eyes; third antennal joint linear ;

abdomen conical. .

Apical cell opened « . «1 ew es

Apical cell closed .

Facial ridges with a row of bristles . .

Facial ridges without bristles. . . . . . .

Eyes bare 2. 2. 6 + © ee ee ee

Eyeshairy. . - - 2 + ee ee ew ee

third joint twice as.

Masicera, Macq. /0 3

Metopia, Meig. //4

27.

Baumhaueria, Meig. //S~

Prospherysa, v. d. Wulp. //6

Siphona, Meig. /2S”

29.

Thryptocera, Macq. / 2-"]

30.

Lasiona, v. d. Wulp. /2"]

31.

32.

36.

Macquartia, Rob.-Desv. / 2 ¥

33.

34.

35.

Labidigaster, Macq. /3|

Myobia, Rob.-Desy. | 9 >

Polygaster, v.d. Wulp. ]39

Hypostena, Meig. /4/0

37.

43.

38.

39.

Degeeria, Meig. [30 _

Didyma, v. d. Wulp. /5G

44 DIPTERA.

39. Vibrissz absent (next the oral margin several short bristles,

among which the two vibrissz cannot be distinguished from

the others) . 2. 1. 1 ee ee ee ee ee ee 40. -

Vibrisse distinct . . . . . . . . Al.

40, Wings without a costal spine (unusually dilated ; in the male) ; |

second vein close to the costa and far from the third . . Neoptera, v.d. Wulp. Its

Wings with a costal spine (not dilated in the male) ; second

vein at an equal distance from the costa and from the third

vein; (abdomen very transparent and with black spots). . Cenosoma, v. d. Wulp. 166

41. Vibrissze inserted at some distance above the oral margin. . Telothyria, v. d. Wulp. /67]

Vibrissz inserted just at the oral margin . . . . . « . 42.

42, Abdomen elliptical, conical or ovate. . . . . . . . . Anisia, v. d. Wulp. [ &b

Abdomen rounded. . . . . .. 1 6 » es . . « Spherina, v. d. Wulp. 205—

43. Apical cell long-petiolated . . . . woe ee ew AA

Apical cell short-petiolated or closed at the wing-margin. . 45.

44. Cheeks with a row of bristles close to the orbits of the eyes . Rhinophora, Rob.-Desv. 295°

Cheeks bare . . . ........... . « Leweostoma, Meig. 206

45, Third antennal joint short. . . . . . . . . . . . Clista, Meig. 297

“Third antennal joint long . 2. 2... ee...) Myothyria, v. d. Wulp. 206 |

DISTICHONA, gen. nov.*

Head a little broader than the thorax; front rather broad, somewhat prominent; frontal bristles in a double

row on each side of the frontal band; face perpendicular; vibrisse at a little distance above the oral

margin, which is not prominent; facial ridges with a row of bristles; cheeks broad. Eyes more or less

* oo pilose, descending to the vibrisse. Antenne shorter than the face; third joint more than twice as long as

Wet iw the second ; arista thickened nearly to the end, distinctly jointed, sometimes nicked. Proboscis exserted ;

palpi filiform. Abdomen elongate-oval; first segment shorter than the following; second and third

segments only with marginal macrochete. Wings without a costal spine; curvation of the fourth vein

angular, but without appendice ; apical cell opened at some distance from the wing’s tip.

This genus may be compared with Cnephalia, Phorocera, and Baumhaueria: from

the first it differs by the hairy eyes and a less broad front; from Phorocera by the

thick and distinctly-jointed arista; and from Baumhaueria by the hairy eyes. It

contains but a single species.

1. Distichona varia, sp. n., ¢ @. (Tab. III. figg. 2; 2a, head; 26, head in

profile, ¢ .)

Cinereous ; frontal band, four stripes on the thorax, reflections on the abdomen, and the antenne and legs

black ; palpi rufous.

Length 8°5 millim. ;

Front in both sexes broader than the diameter of the eyes ; frontal band black, nearly as broad as the sides, but

sometimes becoming narrower or disappearing in a greyish reflection ; inner row of the frontal bristles

descending to beneath the second antennal joint ; in some specimens the colour ‘of the face and cheeks

has a tendency to ochraceous. asal joints of the antenne more or less rufous and of equal length ;

third joint three or four times as long as the second; penultimate joint of the arista half as long as the

* dis (double); orixos (row).

DISTICHONA.—CNEPHALIA. 45

apical joint. The eyes of some male specimens very densely, in others more thinly, but always con-

spicuously, pilose; in the female this pilosity seems to be absent. Proboscis black; palpi not thicker

towards the tip. Thorax with four rather broad black stripes over the whole length of the dorsum, these

becoming somewhat diffuse towards the hind margin; scutellum with a brown reflection. Abdomen with

dark brown reflecting spots on the hind margins of the segments; anal segment usually of the cinereous

ground-colour of the preceding segments, sometimes more reddish; anus usually rufous. Legs black or

somewhat piceous ; middle tibie outwardly with three long macrochetw; hind tibie outwardly with a

row of shorter and some longer bristles; foot-claws and pulvilli elongate, the pulvilli obscure. Tegule

whitish. Wings greyish-hyaline; small cross-vein on the middle of the discal cell; apical cross-vein a

little concave ; posterior cross-vein nearly straight, oblique, a little beyond the middle between the small

’

cross-vein and the curvation of the fourth vein.

Hab. Mexico, Chilpancingo, Xucumanatlan and Omilteme, in Guerrero 4600 to

7000 feet, Cuernavaca in Morelos (H. H. Smith).

Several specimens of both sexes; one of the males is much smaller in size than the

others (5°5 millim.).

This species bears a striking resemblance to Baumhaueria in its general facies, and

also has a thick arista and bristles on the facial ridges, &c.; but owing to its hairy

eyes it cannot be admitted in that genus. In some of the specimens the apical ¢ wn

is closed and shortly petiolated. MELOY ll. LAOTS Wo RES V3, -

The genus Acroglossa, Williston (in Soudder’s «Butterflies of 1 the Eastern United

States and Canada,’ p. 1916), seems to be allied to Distichona, as it also has a distinctly

jointed arista and a row of bristles on the facial ridges; but it differs in having bristles

on the sides of the face.

CNEPHALIA.

Cnephalia, Rondani, Dipterol. Ital. Prodromus, ii. p. 39 (1859).

The type of this genus is Tachina hebes, Fall., of Kurope, an insect also occurring in

Mexico; three undescribed species from Central America must be included in the

same genus. ‘These four species may be distinguished as follows :-—

l. Frontal band blackish; cheeks with black hairs; thoracic

dorsum with four black stripes. . . . . 2.

Frontal band rufous; cheeks without black hairs ; thorax only

anteriorly with black lines . . 3.

2. Scutellum (at least towards its hind margin) and sides of ‘the

abdomen testaceous orrufous . ... . . . . ~- + Aebes, Meig.

Scutellum greyish; abdomen without testaceous or rufous

coloration (except the anus). . .. . » 2 + 6 « onusta, v. d. Wulp.

3. Abdomen blackish with yellowish-cinereous reflections . . » obesula, v. d. Wulp.

Abdomen ochraceous with brownish reflections . . . . . ochriventris, vy. d. Wulp.

1. Cnephalia hebes.

Tachina hebes, Fall. Monogr. Musc. Suecie, ii. p. 19.

Gonia hebes, Meigen, System. Beschr. europ. zweifliigl. Ins. v. p. 7. 11.

46 DIPTERA.

Cnephalia hebes, Rondani, Dipterol. Ital. Prodrom. iii. p. 42. 2.

Cnephalia bucephala, Schiner, Fauna Austriaca, Dipt. i. p. 445.

Hab. Mexico, Jalisco, Atoyac in Vera Cruz (Schumann), Orizaba (Bellardi). —

EUROPE.

Two specimens from Orizaba, a male and a female, in the collection of Professor

Bellardi, and two female examples recently received, one from Jalisco and one from

Atoyac, do not differ from a typical male specimen (originally from the ancient

collection of Prof. Ruthe) from Berlin; and they fully agree with the descriptions of

the above-cited authors.

I believe, however, that Schiner erroneously identified the species, on which Rondani

founded his genus Cnephalia, with Tachina bucephala, Meig. The latter has neither

the scutellum nor the basal joints of the antenne rufous; moreover, Meigen includes

(Syst. Beschr. vii. p. 222) his Tachina bucephala in the genus Nemorea, in which the

eyes are pilose, whilst in Cnephalia they are bare.

/ a,

2. Cnephalia onusta, sp.n., ¢. (Tab. III. figg. 4; 4a, head, 2.) °)°7 "Gp

Cinereous; head white; antenne rufous, the third joint black; palpi rufous; thorax with four black stripes ;

abdomen with blackish reflections.

Length 9 millim. .

Head white, somewhat silvery ; vertex cinereous; front much broader than the eyes; frontal band blackish-

brown, proportionally narrow; frontal bristles forming on both sides three rows, of which the inner

row descends beneath the end of the second antennal joint; cheeks with short black hairs; oral margin

slightly prominent; vibrissee accompanied by some shorter bristles; on the occiput behind the eyes a

regular row of short black bristles. Eyes bare. Antenne shorter than the face; the basal joints rufous,

the third black with a rufous base; second joint elongate; third joint one and a half times as long as

the second; arista short, indistinctly jointed, thickened to near the end. Proboscis black; palpi pale

rufous, cylindrical. Thorax and scutellum greyish-cinereous; thoracic dorsum with four rather broad

black stripes. Abdomen ovate, cinereous with blackish reflections, which are usually on the hind margins

of the segments; anus rufous ; on the hind margin of the second segment a pair of dorsal macrochetee and

a single one on each side; on the hind margin of the third segment a row of about eight macrochete ;

some other macrochete round the anus. Legs black; front femora with regularly arranged bristles ; front

tibiee outwardly with short bristles ; middle tibiz on the outside with four long bristles and inwardly with

one; hind tibize outwardly almost fringe-like with bristles; foot-claws and pulvilli short. Tegule white.

Wings greyish-hyaline, yellowish at the base ; small cross-vein on the middle of the discal cell; apical

cross-vein distinctly curved; posterior cross-vein slightly curved, nearly straight.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

Two female specimens.

8. Cnephalia obesula, sp.n., 9. (Tab. III. figg. 3; 3a, head, 2.)

Blackish; head white; frontal band, palpi, and base of the antenne rufous ; scutellum testaceous; front

margins of the abdominal segments with yellowish-cinereous reflections, the anal segment wholly of that

colour ; the abdomen somewhat transparent. ,

Length 10°5 millim.

Face and sides of the front silvery-white ; front much broader than the eyes; frontal band and vertex rufous ;

frontal bristles forming on both sides three rows, the inner row descending to the end of the second

antennal joint; the bristles of the intermediate row shorter and weaker; oral margin not prominent ;

CNEPHALIA.—NEMORAA. AT

above the vibrisse are four bristles on the facial ridges; cheeks without black hairs; beard and pilosity

of the occiput whitish; eyes bare, a row of short black bristles behind them. Antenne longer than in

the preceding species; basal joints rufous; third joint black, with rufous base; second joint elongate,

bristly ; third joint twice as long as the second; arista indistinctly jointed, thickened to near the tip.

Proboscis blackish ; palpi rufous, thickened towards the end. Thorax blackish, before the transverse

suture with whitish-grey tomentum and two black lines; pleurs greyish; scutellum testaceous. Abdomen

short ovate, very convex; first segment black; second segment blackish, with grey reflections and a

white front margin, laterally rufous, slightly transparent; third segment yellowish-grey, with brown

reflections on the hind margin; anal segment short, pale ochraceous ; macrochetz as in the preceding

species. Legs black; shorter and more robust than in C. onusta, but with similar bristles ; foot-claws

and pulvilli short. Tegule white. Wings brownish-grey, intense yellow at the base; venation like that

of C. onusia.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female example.

Another female specimen, from Tuxpango, in the collection of Prof. Bellardi,

‘agrees with the one from Teapa; it has, however, the third abdominal segment not

yellowish, but of the same greyish coloration as the second segment—the pale ochra-

ceous anal segment, therefore, contrasts more in coloration with the rest of the

abdomen.

4, Cnephalia ochriventris, sp. n., 9.

Ochraceous; head white; frontal band, palpi, and base of the antenne rufous; thoracic dorsum yellowish-

cinereous, anteriorly with black lines.

Length 11 millim.

Allied to C. obesula, and agreeing with it in almost all its characters ; but differing in the ochraceous coloration.

The scutellum and the abdomen are concolorous ; the ochraceous coloration on the latter is partly varied

by brownish reflections, which in one example give the appearance of a dark dorsal stripe and brown hind-

borders to the segments.

Hab. Mexico, Tierra Colorada 2000 feet and Amula 6000 feet, both in Guerrero

(H. H. Smith). |

One female example from each locality.

NEMORAEA.

Nemorea, Robineau-Desvoidy, Essai sur les Myod. p. 71 (1830).

This genus includes a large number of European species, but seems to be less

numerously represented in the New World. Osten Sacken (‘Catalogue of the

described Diptera of North America,’ p. 150) enumerates no more than six species ;

and three of these (WV. masurius, Walk., N. clasides, Walk., and WN. triroides, Walk.) do

not seem to belong to this genus, the eyes not being hairy in either of them. From

South America three species have been described—W. pictipennis, Macq., from Colombia,

N. brasiliensis, Schin., from Brazil, and NV. erythropyga, v. d. Wulp, from Chile.

In the Central-American collections before me there are five species, which I must

consider as yet undescribed. They may be distinguished as follows :—

4§ DIPTERA.

1. Abdomen grey with black reflecting spots, the anal segment

rufous... . . variegata, v. d. Wulp.

Abdomen shining black, or + rufous with a broad black dorsal

band . .. . oe . woe ee we

2. Thorax and scutellum black, the thoracic dorsum only anteriorly

grey with black stripes . . . . . . . 1 es + « + = Obscurella, y. d. Wulp.

Thorax and scutellum yellowish-cinereous . . . . . 3.

3. Anal segment laterally with whitish reflections (male) ; front

tarsi not dilated in the female . . . . ..... ~~. . forreri, v.d. Wulp.

Anal segment without whitish reflections ; front tarsi dilated in

; the female. 2. 2 1 1 ew ee ee ee ee

4, Abdomen laterally rufous . . . . . . 1 1 we ee | Smithi, v. d. Wulp.

Abdomen unicolorous black. . . . . 2... . . «+ « «intermedia, v. d. Wulp.

1. Nemorea variegata, sp. n., ¢ 2.

Thorax cinereous, with four black stripes ; abdomen with blackish and cinereous reflecting spots; anal segment

rufous; antenne and legs black; wings greyish-hyaline.

Length 7—10°5 millim.

Head yellowish ; cheeks and sides of the front with brown reflections; front of the male narrow, that of the

female a little broader than the eyes; frontal band black; frontal bristles on both sides descending in a

single row to beneath the end of the second antennal joint; beard and pilosity of the occiput whitish ;

cheeks narrow ; the eyes descending nearly to the inferior part of the head. Antenne black; second joint

with many short bristles; third joint twice as long as the second, rounded at the tip; arista thickened on

the proximal half. Proboscis black; palpi thick, black or dark brown in the male, rufous in the female.

Thorax cinereous, the thoracic dorsum grey with four black stripes, which are also conspicuous behind

the transverse suture; scutellum piceous. Abdomen ovate; first segment black; second and third

segments testaceous in the male, black in the female, with whitish or cinereous, irregular, reflecting spots ;

anal segment in both sexes rufous, with clear (greyish or ochraceous) reflections; second and third

segments only with marginal macrochete; anal segment with several irregularly-placed macrochete.

Legs black, bristly ; middle tibie outwardly with a longer bristle ; hind tibie on the outside almost fringe-

like with many bristles ; foot-claws black, the pulvilli yellowish, elongate in the male; front tarsi of the

female not dilated. Tegule whitish. Wings nearly hyaline; small cross-vein on the middle of the discal

cell ; apical cross-vein nearly straight ; posterior cross-vein more or less curved.

Hab. Mexico, Xucumanatlan 7000 feet and Omilteme 8000 feet, both in Guerrero

(H. H. Smith).

Two males and one female.

Owing to the shape of the head and the eyes, this species belongs to the division of

Nemorea upon which Rondani has formed his genus Chetolyga.

2. Nemorza obscurella, sp.n., 3 9.

Black ; head and anterior part of the thorax cinereous, the latter with five black stripes; palpi rufous ; abdo-

minal segments only with marginal macrochete.

Length 9°5-10°5 millim.

Front cinereous, narrowed behind, in the female broader than the eyes; frontal band blackish, in the male

nearly as broad as the sides, in the female proportionally narrower ; frontal bristles descending to the end

of the second antennal joint, in the male in a single row, in the female outwardly with some other bristles.

Face and cheeks whitish, with cinereous reflections, the cheeks descending somewhat beneath the eyes

NEMORAA. 49

(but much less than in the following species, NV. forreri, N. smithi, &c.); beard yellowish, the pilosity of

the eyes and that of the occiput of the same colour. Antenne not quite reaching the inferior border

of the eyes, black; second joint sometimes slightly rufous at the tip, on its upper part with some bristles ;

third joint twice as long as, and scarcely broader than the second, rounded at the end; arista thickened

on the proximal half. Proboscis black ; palpi rufous, thickened towards the tip. Thorax and scutellum

black; the thoracic dorsum before the transverse suture and immediately behind it with some grey

tomentum and five black stripes, of which the three median are narrower and closer to each other.

Abdomen ovate, shining black, with a slight bluish tint, densely beset (like the thorax and the scutellum)

with black hairs; there are macrochete on the hind margins of the second and third segments and others

more irregularly placed on the anal segment. Legs black, with many bristles; middle tibie outwardly

with some very long bristles; hind tibia: outwardly nearly fringe-like with shorter bristles, in the middle

of which a longer one appears ; foot-claws black, the pulvilli yellowish, elongate in the male (I am not

certain whether the front tarsi of the female are dilated or not, the single specimen received of that sex

having lost both the front legs). Tegule blackish, with a yellowish margin. Wings greyish-hyaline; small

cross-vein oblique, on the middle of the discal cell ; curvation of the fourth vein with a right angle ; apical

and posterior cross-veins slightly curved.

Hab. Mexico, Amula 6000 feet and Xucumanatlan 7000 feet, both in Guerrero

(H. H. Smith).

Three males and one female.

8. Nemorza forreri, sp.n.,.g 9. (Tab. II. figg. 21; 21a, head in profile.)

Head whitish ; thorax and scutellum yellowish-cinereous; abdomen shining black, the anal segment in the

male usually with pale yellow or whitish reflections ; legs black, the front tarsi not dilated in the female ;

antenne and palpi rufous; base of the wings infuscated.

Length 10-12 millim.

Head yellowish-white; cheeks broad, with a rather insignificant yellowish pile; oral margin a little prominent ;

vibrissee at some distance above the oral margin, accompanied by some shorter bristles; beard and pilosity

of the occiput pale yellow. Front in the male narrowed behind; in both sexes with cinereous reflections,

and a piceous, sometimes indistinct, median band; frontal bristles deseending in a single curved row

beneath the root of the antenns, and external to this row in the female a row of four bristles. Eyes

distinctly pilose. Antenne rufous; third joint with a more or less black or piceous extension, especially

in the male; second joint elongate, bristly on the upper part; third joint scarcely longer, convex on the

front side; arista black, thickened to beyond the middle; the articulation on the base rather conspicuous.

Proboscis shining black; palpi rufous, with short black bristles below and at the end. Thorax and

scutellum densely clothed with yellowish-cinereous tomentum; thoracic dorsum with four dark lines ;

macrochete of the hind margin of the scutellum long and stout. Abdomen broadly ovate, shining black,

on the upper part usually with a bluish, on the sides and near the extremity with a reddish tinge, in

the male on both sides of the fourth segment with a pale yellow or whitish reflecting spot; macrochete

in the middle and at the hind margins of the segments, on the fourth segment on the entire surface.

Legs black; front femora outwardly with grey tomentum; bristles abundant, those of the middle

tibie long and robust: pulvilli and foot-claws yellow, the claws with black tips—in the male they are

longer and surrounded by long hairs. Tegule yellowish. Wings with a grey tinge, infuscated at the

base, the dark colour covering the first basal cell; small cross-vein placed on the middle of the discal

cell; apical and posterior cross-veins oblique and curved.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer), Xucumanatlan 7000 feet and

Omilteme 8000 feet, both in Guerrero (H. H. Smith), Navarrete in Tepic and Atoyac

in Vera Cruz (Schumann),

Several specimens of both sexes. In coloration and even in general facies this

BIOL. CENTR.-AMER., Dipt., Vol. II., Janwary 1890. h

50 DIPTERA.

species closely resembles Echinomyia analis (Fabr.); but it cannot be confounded with

that insect if attention is paid to the shape of the antenne (the third joint of which

is not shorter than the second), the hairy eyes, &c.

4. Nemorza smithi, sp.n., ¢ ?.

Head whitish; thorax and scutellum with yellowish tomentum ; abdomen shining rufous, with a broad black

dorsal band; antenne dark rufous; palpi ochraceous ; legs black, the front tarsi dilated in the female ;

base of the wings infuscated.

Length 8 millim.

Allied to WV. forreri, but smaller in size. The frontal band more obscure and narrower ; the third joint of the

antennw longer, nearly twice as long as the second ; the arista more distinctly jointed ; the abdomen not

unicolorous black, but brownish-red with a rather broad black dorsal band ; the foot-claws black ; the

three median joints of the front tarsi distinctly dilated in the female; and the infuscation at the base of

the wings more intense and more extended along the costa.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

One male and four female specimens.

5. Nemorza intermedia, sp.n., ¢ 2.

Head whitish ; thorax and scutellum yellowish-cinereous ; abdomen shining black ; antenne and palpi rufous ;

legs black, the front tarsi dilated in the female ; base of the wings infuscated.

Length 8-11°5 millim.

This species also is closely allied to WV. forreri. The abdomen is unicolorous shining black, in the male without

any whitish reflection on the anal segment; the frontal band is brown and narrow; in the female the

three median joints of the front tarsi are dilated, though they are less broad than in NV. smithi. In some

female specimens the fuscous coloration of the wings is as intense as in that species, but these examples

differ from NV. smith in the total absence of red colour on the sides of the abdomen.

Hab. Mexico, Xucumanatlan 7000 feet and Omilteme 8000 feet, both in Guerrero

(H. H. Smith), Mexico city (Schumann).

Several specimens.

It has given me some trouble to distinguish N. forreri, N. smithi, and N. intermedia,

as these bear a striking resemblance to each other ; but, owing to the above-mentioned

differences, I must regard them as three very closely allied but distinct species. I

have found, however, some individuals which seem to be hybrids of WV. forrert and .

N. intermedia. All are females: some of them have the broad frontal band of the

former and the dilated front tarsi of the latter; in other and very small female specimens

(5°5-6'5 millim. in length), on the contrary, the frontal band is brown and narrow, but

the tarsi are not at all dilated.

There is still another described species of this genus from Central America :—

Nemorea intrita, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 297.—Mexico.

MYSTACELLA. 51

Following Schiner, who included Chetolyga, Rond., and Tricholyga, Rond., in the

genus Nemorea, Meig., it is necessary to notice here various Mexican species which

have been briefly characterized by M. Bigot :—

Chetolyga erythropyga, Bigot, Ann. Soc. Ent. Fr. 1888, p. 257. no. 17.—Mexico.

nigriventris, Bigot, 1. c. no. 18.—Mexico,

— dubia, Bigot, 1. c. no. 20.—Mexico.

nigripalpis, Bigot, 1. c. p. 258. no. 21.—Mexico.

Jlavolimbata, Bigot, 1. c. no. 22.—Mexico.

albopicta, Bigot, 1. c. no. 23.—Mexico.

— occidentalis, Bigot, 1. c. no. 25.—Mexico.

—— nitidiventris, Bigot, 1. c. no. 26.—Mexico.

enea, Bigot, |. c. p. 259. no. 27.—Mexico. |

Tricholiga caloptera (sic), Bigot, 1. c. p. 263. no. 53.— Mexico.

fulvidapex, Bigot, 1. c. no. 54.—Mexico ?

MYSTACELLA, gen. nov.*

Head as broad as the thorax; front usually a little prominent ; face perpendicular ; vibrisse at a considerable

distance above the oral margin, surmounted by some shorter bristles along the inferior part of the facial

ridges. Eyes hairy, not descending beneath the vibrisse (except in M. rubriventris and M. adjuncta, where

they extend lower). Antenne elongate, but shorter than the face; third joint at least twice as long as the

second, usually longer; arista not visibly jointed. Proboscis exserted; palpi cylindrical or filiform.

Abdomen broadly ovate ; first segment usually shorter than the following; macrochete in the middle and

on the hind margin of the segments (in some species partly absent). Legs bristly. Wings without a costal

spine; apical cell opened at some distance before the wing’s tip; curvation of the fourth vein angular,

without appendice ; posterior cross-vein nearer to that curvation than to the small cross-vein.

This genus differs from Memorea and Exorista by the vibrisse being inserted at a

notable distance above the oral margin, and from Nemorea, moreover, by the more

elongate third antennal joint; from Macquartia by this latter character and by the

shorter and broader shape of the body. From Brachycoma and Meigenia, which also

have the vibrissee at some distance above the oral margin, it is distinguished by the

hairy eyes f.

The genus contains the following species from Central America :—

1. Front not at all prominent; eyes descending beneath the

vibrisse 2 6 6 ew wee ee ee ww ee rUbriventris, v. A. Wulp.

Front more or less prominent; eyes usually not descending

beneath the vibrisse . . 2. 1. 1 1 1 ew ee ee

* povorak (whisker).

+ Schiner in his synoptic table of the European Tachinine (Fauna Austriaca, Diptera, i. p. lxxiii) has ranged

Meigenia among the genera with bare eyes. In his description of the genus (J. c. p. 471) he calls the eyes

hairy, but adds that the pilosity in most species is scarcely visible; Metgenia majuscula, Rond., which has the

eyes distinctly pilose, may perhaps, therefore, be better placed in Mystacella.

Yellowish-cinereous ; front not prominent, very narrow behind; thorax with five black stripes ;

Head whitish with cinereous reflections ;

10.

ll.

. Antenne black with the basal joints rufous ;

. Front very prominent ;

DIPTERA.

. Abdomen unicolorous black .

Abdomen otherwise coloured, if black having some whitish

reflections .

. Second and third abdominal segments without macrochetz or

only with marginal ones . . .

Second and third abdominal segments, at “least the third, with

discal and marginal macrochetee

. Ground-colour of the abdomen violaceous, with a tendency to

metallic blue or green, and with rather sharply limited black

hind borders of the segments . ........

Ground-colour of the abdomen grey or testaceous with blackish

reflecting spots, or black with whitish reflections .

thoracic stripes

rather broad woe ee

Antenne wholly black ; thoracic stripes linear

. Anal segment of the same grey coloration as the preceding

segments se ee

Anal segment rufous or ochraceous. . - oe ew th

eyes not descending beneath the

vibrissz toe oe . . .

Front slightly prominent ; eyes descending beneath the vibrissze

Scutellum testaceous; bristles of the hind tibie fringe-like

Scutellum greyish, only slightly rufous at the hind margin;

bristles of the hind tibiz not fringe-like . .

black hind-borders of the abdominal segments

sharply limited

Ochraceous ;

Grey or cinereous, the abdomen with blackish reflecting spots ;

or black, the abdomen with whitish reflections .

Anal segment rufous oe eee oe

Anal segment of the same coloration as the preceding segments

Small cross-vein on the middle of the discal cell .

Small cross-vein distinctly before the middle of the discal cell .

1. Mystacella rubriventris, sp. n., ¢.

lugubris, v. d. Wulp.

violacea, v. d. Wulp.

lineata, v. d. Wulp.

solita, v. d. Wulp.

adjuncta, v. d. Wulp.

tessellata, v. d. Wulp.

postera, v. d. Wulp.

fuscicostalis, v. d. Wulp.

10.

flavifrons, v. d. Wulp.

ll.

subcyanea, v. d. Wulp.

setulosa, v. d. Wulp.

scutellum and

abdomen testaceous, the abdomen with yellowish and dark reflecting spots and a black dorsal band; no

dorsal macrochete ; third antennal joint and legs black ; wings hyaline.

Length 10 millim.

front very narrow, on the vertex less broad than half the diameter

of the eyes; frontal band black ; frontal bristles rather weak and short, increasing in length towards the

antenne and descending to the end of the second antennal joint ; the bristles on the vertex more robust.

Kyes densely but shortly pilose, descending to beneath the vibrisse ; oral margin laterally densely beset

with short hairs, the hairs ascending along the facial ridges up one third of the face, and out of which the

two vibrisse arise at a considerable distance above the oral margin.

Antenne notably shorter than the

face ; the basal joints dark rufous; third joint black, nearly twice as long as the second ; arista thickened

scarcely to the middle.

Proboscis black ; palpi pale rufous, filiform. Thorax yellowish-cinereous, with five

MYSTACELLA. 53

black stripes, which are slightly interrupted at the transverse suture, the outer stripes somewhat broader

than the others; scutellum testaceous, somewhat transparent. Abdomen reddish-testaceous, with a black

dorsal ‘band and yellowish reflecting spots, which usually appear on the front margins of the segments—in

some directions these spots are bordered by other brown or black spots, and the dorsal band becomes double ;

some macrochete are present only on the sides and on the anal segment, there are none on the dorsum ;

ventral face densely beset with black hairs, especially towards the anus. Legs black; front femora with

regularly-placed long bristles ; front tibiee outwardly with a row of short bristles ; hind tibie fringed on

the outside, and in the middle outwardly with one, inwardly with three long bristles ; foot-claws and pulvilli

elongate, the pulvilli greyish. Tegule whitish. Wings nearly hyaline, with a yellowish tint at the base

and along the costa ; small cross-vein under the end of the auxiliary vein and on the middle of the discal

cell; curvation of the fourth vein forming a rectangle ; apical and posterior cross-veins slightly curved.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith), Tuxpango (coll. Bellardi).

A single male specimen was captured by Mr. Smith; and I have seen another, quite

similar, in the collection of Prof. Bellardi.

2. Mystacella lugubris, sp. n., ?.

Black ; thorax anteriorly grey with black lines; scutellum brown; head whitish ; palpi rufous.

Length 8°5 millim.

Front blackish, slightly prominent, broader than the eyes; frontal band dark rufous; frontal bristles on both

sides in a single curved row, descending as far as the end of the second antennal joint; two stout bristles

external to each row; face and cheeks white, with greyish reflections; cheeks broad, with a row of short

black hairs; vibrisse at a considerable distance above the oral margin, and surmounted by a row of four

shorter bristles on the facial ridges; beard and pilosity of the eyes white. Antenne black, descending to

two-thirds of the face; second joint bristly ; third joint twice as long as the second ; arista thickened to

beyond the middle. Proboscis black ; palpi rufous, with black hairs. Thorax black, anteriorly with some

whitish tomentum and the beginning of two black lines; scutellum castaneous. Abdomen broadly ovate,

not longer than the thorax, shining black and black-haired ; macrochxtz on the hind margins of the

second and third segments, and more numerously on the anal segment. Legs black ; front tibiee with

short bristles ; middle tibise with some long bristles ; hind tibie outwardly fringed with bristles and with a

longer one beneath the middle. Tegule blackish. Wings greyish-hyaline, the base and the small cross-

vein slightly infuscated ; this cross-vein before the middle of the discal cell; apical cross-vein slightly

curved ; posterior cross-vein nearly straight. ,

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single female specimen.

This species has some resemblance to Nemorewa obscurelia, but may easily be distin-

guished from it by having the vibrisse distinctly removed from the oral margin, the

head and the tomentum on the thorax whiter, the arista shorter and thicker, &c.

3. Mystacella violacea, sp.n., ¢ 2.

Cinereous (sometimes of a more obscure colour) with a violet tint; head ochraceous; frontal band, four

thoracic stripes, hind margins of the abdominal segments, antenne ‘(except the basal joints), and legs

black ; palpi rufous; wings infuscated at the base and along the costa.

Length 9°5 millim.

Head ochraceous with brown reflections; front narrowed behind, in the female broader ; frontal band black ;

frontal bristles rather weak, descending on both sides in a double row beneath the root of the antenne ;

eyes in the female less pilose, only a little pubescent ; vibrissee surmounted by some shorter bristles.

Basal joints of the antenne rufous; third joint black, rufous at the base ; second joint bristly on its upper

54 DIPTERA.

part ; third joint narrow, rounded at the end, three times as long as the second; arista thickened to nearly

half its length; palpi rufous. Thoracic dorsum and scutellum ochraceous, partly with a peculiar violet

tint, the shoulders more brightly ochraceous ; the thorax with four black stripes over its whole length,

and sometimes with a fifth stripe appearing anteriorly in the middle. Abdomen cinereous, with the same

violet tint as the thorax and with brown reflections; the first segment, a narrow border on the hind

margins of the following two segments, the anus, and the ventral face black; macrochetz on the hind

margins of the second and third segments, and a pair of smaller size at some distance before these margins

(in some specimens these latter are absent) ; anal segment, as usual, with several macrochete. Legs black ;

on the outside of the hind tibie the bristles are fringe-like and a little beneath the middle a longer bristle

appears between them ; foot-claws and pulvilli elongate in the male; pulvilli greyish-testaceous. Tegule

cinereous, with a yellowish margin. Wings grey, usually infuscated at the base and along the costa to the

end of the second vein ; small cross-vein a little before the middle of the discal cell; curvation of the

fourth vein nearly rectangular ; apical cross-vein somewhat concave; posterior cross-vein slightly curved.

Hab. Mexico (coll. Bellardi), Chilpancingo 4600 feet, Amula 6000 feet, Xucuma-

natlan 7000 feet, Omilteme 8000 feet, all in Guerrero, Atoyac in Vera Cruz, Teapa in

Tabasco (H. H. Smith), Temax in North Yucatan (Gaumer); GuaTEMaLa, Zapote

(Champion).

Many specimens of both sexes.

_- Ina splendid variety, of which I have before me several examples of both sexes, the

thorax is much more obscure, the ochraceous tomentum being reduced to a small

humeral spot, and the abdomen has a metallic green or blue coloration. Mr. Smith,

who collected a large series of this variety, has noted the coloration of living spe-

cimens as follows :—*“ thorax brilliant green with black marks; abdomen blue-green ;

head golden-yellow, vertex green, frontal stripe velvety brown.”

Mystacella violacea seems to be a common insect in Mexico, and it is also represented

in the collection of Prof. Bellardi.

It is possible that Hurigaster commetans, Walk. (Trans. Ent. Soc. Lond. n. ser. v.

p. 299), belongs to the same species. The description is applicable, but the peculiar

violet tint which distinguishes the species is not mentioned, nor is it stated whether the

eyes are hairy or not; the genus Hurigaster (as it is adopted by Macquart) includes

species with bare, as well as others with hairy, eyes.

4. Mystacella lineata, sp. n., d 2.

Cinereous with a violet tint; frontal band, antennae, legs, four slender Jines on the thorax, and the hind

margins of the abdominal segments black ; palpi rufous ; wings nearly hyaline.

Length 10 millim.

Very closely allied to the preceding species. The front is narrower in the male, dark cinereous, sometimes

with a bluish tint. The antenne are wholly black and longer, the third joint four times as long as the

second. The stripes on the thorax are much narrower, linear. The abdomen has the same tendency to

become blue or green. The wings are not infuscated at the base and along the costa, only the veins are

bordered by a dilute brownish tint.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

One male and two female specimens.

MYSTACELLA. 55d

5. Mystacella solita, sp.n., ¢ 2.

Head yellow; front very prominent; thorax yellowish-cinereous, with black stripes; scutellum cinereous ;

abdomen grey, with blackish reflecting spots; antennew and legs black; palpi rufous.

Length 11:5 millim.

Front very prominent, in both sexes broad, on the vertex as broad as the eyes; frontal band blackish-brown,

nearly as broad as the sides, which are pale ochraceous with a yellowish-brown reflection ; frontal bristles

on both sides in a single row, descending as far as the end of the second antennal joint ; cheeks broad, of

the same coloration as the sides of the front, beneath the eyes with a deep impression and a castaneous

reflection ; median portion of the face whitish, with brown reflections ; oral margin white and somewhat

silvery ; eyes not descending beneath the vibrissee, covered by a short yellowish pile. Antenne shorter

than the face, black, the basal joints slightly rufous; second joint bristly ; third joint three times as long

as the second; arista thickened on the proximal half. Proboscis black, the terminal lips with yellowish

hairs; palpi rufous. Thorax yellowish-grey, with four narrow black stripes, the outer stripes inter-

rupted at the transverse suture; scutellum cinereous, unicolorous except a small brownish spot, which

sometimes appears near the hind margin. Abdomen ovate, whitish-grey; first segment black; the

following segments with blackish reflecting spots and black hind borders; macrochetz on the hind

borders of the segments; ventral face blackish. Legs black, slender, though not very long; foot-claws

and pulvilli elongate in the male; pulvilli pale yellow; middle tibia with some long bristles; hind

tibia outwardly nearly fringe-like with bristles. Tegule white; wings greyish-hyaline, somewhat

yellowish on the base and costa; small cross-vein on the middle of the discal cell; apical cross-vein

nearly straight ; posterior cross-vein slightly curved.

Hab. Mexico, Chilpancingo 4600 feet, and Amula 6000 feet in Guerrero (H. H.

Smith).

A male specimen from the former, a female from the latter locality. The female is

of a much smaller size (7°5 millim.); but I have no doubt that it belongs to this species,

as it agrees in all the characters with the male, except that it has the thorax and

scutellum somewhat more ochraceous.

6. Mystacella adjuncta, sp. n., ¢.

Grey ; scutellum yellowish-cinereous ; abdomen with blackish reflections; antennew and legs black; palpi

rufous.

Length 9°5 millim.

Head whitish-grey, with blackish reflections; front slightly prominent, scarcely narrowed behind, and there

nearly as broad as the eyes; frontal band black; frontal bristles descending on both sides in a single

row to the end of the second antennal joint; eyes with yellowish pile, and descending to beneath the

vibrisse ; beard white. Antenne nearly as long as the face; second joint short, bristly ; third joint five

_or six times as long as the second; arista thickened on less than the proximal half. Proboscis black, the

terminal lips with yellow hairs; palpi rufous. Thorax grey, with indistinct dark stripes, the most

conspicuous of which are two median lines ; scutellum yellowish-cinereous, the base sometimes appearing

blackish. Abdomen elongate-oval; first segment black; the following segments grey with blackish

reflections and black hind borders; macrochete at the hind margins of the segments and several on the

anal segment, Middle tibia with some long bristles; hind tibie outwardly with a row of bristles and

a longer bristle beneath the middle ; foot-claws and pulvilli elongate, the pulvilli yellowish. Tegule

whitish. Wings greyish-hyaline ; small cross-vein a little before the middle of the discal cell; apical

cross-vein nearly straight ; posterior cross-vein slightly curved.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single male specimen.

56 DIPTERA.

7. Mystacella tessellata, sp.n.,¢ 9.

Greyish-cinereous ; antenne, legs, frontal band, and four stripes on the thorax black; palpi pale rufous ;

scutellum testaceous ; abdomen with blackish reflecting spots, in the male laterally testaceous ; anal

segment rufous.

Length 7:5 millim.

Head yellowish-grey with brown reflections ; front in the male much narrowed behind (more than in the

preceding species), in the female broader than the diameter of the eyes; frontal band over its whole

length of equal breadth; frontal bristles short, descending to the number of four beneath the root of the

antenne: cheeks bare; eyes densely pilose. Antenne much shorter than the face; third joint rather

broad, twice as long as the second. Thorax whitish-grey, with four black stripes; in the male usually

with a conspicuous fifth or median stripe; the portion before the scutellum bluish in tint. Abdomen

grey (laterally testaceous or rufous in the male), with irregular dark brown or blackish reflecting spots

and an interrupted black dorsal line; third segment with a narrow white front margin ; anal segment

rufous, with grey or yellowish reflecting spots, and densely beset with black hairs; in the female two long

macrochsete on the hind margin of the second segment ; in both sexes there is a row of similar macrochate

on the hind margin of the third segment. Legs black; femora with many bristles, which are regularly

arranged on the front pair; front tibia outwardly with a row of bristles; middle tibia with some long

and robust bristles; hind tibie with the outer bristles almost fringe-like, in the female with a longer

bristle beneath the middle; foot-claws and pulvilli elongate in the male; pulvilli greyish. Tegule

whitish. Wings greyish-hyaline ; small cross-vein before the middle of the discal cell; apical cross-vein

very slightly concave ; posterior cross-vein distinctly curved.

Hab. Mexico, Amula 6000 feet, Xucumanatlan 7000 feet, and Omilteme 8000 feet,

all in Guerrero, Cuernavaca in Morelos (H. H. Smith).

Several male and two female specimens.

A male example, captured by Mr. Smith at Venta de Zopilote (Guerrero, 2800 feet),

is of a much larger size (13 millim. in length), but agrees very closely with the descrip-

tion given above; it has, however, the frontal bristles still shorter than in the normal

specimens, and the outside of the hind tibie more densely fringed. Perhaps it may

belong to a distinct species.

The males of MW. tessellata bear a striking resemblance to W. rubriventris, but are recag-

nizable by their more prominent front and the eyes not descending beneath the vibrisse.

8. Mystacella postera, sp. n., 2.

Yellowish-grey ; head and anal segment ochraceous; thorax with four black stripes; hind margin of the

scutellum rufous; abdomen with blackish reflecting spots; antenne and legs black, the posterior tibie

dark rufous ; palpi rufous.

Length 8°5 miliim.

Head bright ochraceous, partly with brown reflections ; front slightly prominent, notably broader than the

eyes ; frontal band blackish, broad, but sometimes evanescent; frontal bristles widely remote from each

other, on both sides descending in a curved row to beneath the second antennal joint ; above the vibrisse

four shorter bristles which mount on to the facial ridges; eyes short-haired. Antennx black ; second

joint bristly ; third joint two and a half times longer than the second; arista thickened on the proximal

half. Proboscis black; palpi rufous. Thorax grey, with four distinct broad black stripes; scutellum

cinereous, with the hind margin pale rufous. Abdomen ovate, grey, with irregular blackish reflecting

spots; the sides yellowish; anal segment bright ochraceous; two dorsal macrochetz on the hind

margin of the first and second segments; a row of macrochete on that of the third segment; anal

segment with several macrochete. Legs black, the femora with grey reflections; middle and hind tibia

dark rufous ; middle tibie outwardly with three long bristles; hind tibie with several bristles of unequal

MYSTACELLA. 57

length. Teoule white. Wings greyish-hyaline; small cross-vein nearly on the middle of the discal cell ;

apical and posterior cross-veins curved.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (A. H. Smith).

A single female specimen.

9. Mystacella fuscicostalis, sp.n.,3. (Tab. III. figg. 5, 5a, head in profile, ¢ .)

Ochraceous; frontal band, four thoracic stripes, hind margins of the abdominal segments, antennz, and legs

black ; wings infuscated at the base and along the costa. ,

Length 10 millim.

Allied to the two preceding species, but distinguished by the bright ochraceous tomentum and the total

absence of violet or metallic coloration. Head ochraceous, with brown reflections; the central portion of

the face yellowish-white ; frontal bristles descending on both sides in a single row; the bristles above

the vibrisse more numerous and reaching to about one third of the face. Antenne entirely black. Palpi

black, more or less rufous towards the tip. The black thoracic stripes rather broad; the pleure partly

covered with a yellowish-grey tomentum ; scutellum rufous. Abdomen bright ochraceous, with brown

reflections ; first segment black, the following segments with a rather narrow black hind border ; macro-

cheete not very strong and scarcely rising between the dense black pile—on the second and third segments,

however, they are conspicuous in the middle and on the hind margins; ventral face brown, with the

front borders of the segments greyish. The brownish coloration at the base and along the costa of the

wings is more intense than in M. violacea and M. lineata; the venation is similar to that of these two

species.

Hab. Mexico (coll. Bellardi); Costa Rica, Cache and Irazu (Rogers). .

Four male specimens have been received from Costa Rica. I have also seen a male

example from Mexico in the collection of Prof. Bellardi.

10. Mystacella flavifrons, sp. n.,¢ ¢.

Ochraceous ; antenne, legs, frontal band, four stripes on the thorax, and some large reflecting spots on the

abdomen black ; anal segment rufous.

Length 10-10°5 millim.

The front, the upper portion of the cheeks, the thoracic dorsum, and the scutellum covered with a bright

ochraceous tomentum. Front prominent, narrowed behind, and there as broad as the diameter of the

eyes, in the female a little broader ; face retreating; frontal band blackish; beneath the frontal bristles

the cheeks are beset with short hairs. Antenne black, the basal joints sometimes more or less rufous ;

second joint bristly ; third joint nearly four times as long as the second; arista thickened on the proximal

half. Proboscis black; palpi dark rufous. Thoracic dorsum with four black stripes—the intermediate

stripes attenuated towards the head and but little prolonged behind the transverse suture, the outer

stripes broader, less regular, and not reaching the anterior margin of the thorax, but running over the

whole length behind the suture; pleure greyish. Abdomen yellowish-grey ; first segment black; on each

of the second and third segments a pair of large black, somewhat reflecting, spots, which do not reach the

anterior margin; anal segment rufous, with ochraceous tomentum on its front border; ventral face,

except the anal segment, black, with the front margin of the second and third segments grey. Legs with

many long bristles and hairs; foot-claws and pulvilli elongate in the male; the pulvilli brownish-grey.

Tegule pale yellow. Wings greyish-hyaline; small cross-vein on the middle of the discal cell; apical

and posterior cross-veins slightly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

Several specimens of both sexes.

BIOL, CENTR.-AMER., Dipt., Vol. II., February 1890. a

58 DIPTERA.

11. Mystacella subcyanea, sp. n., 2

Black ; head yellow ; thorax greyish, with four black stripes; abdomen bluish, with white reflecting spots ;

palpi rafous ; apical cross-vein arcuated.

Length 7 millim.

Head pale ochraceous ; front slightly prominent, on the vertex nearly as broad as the eyes; frontal band black ;

frontal bristles distinctly descending beneath the end of the second antennal joint; eyes densely clothed

with yellowish pile; beard white. Antenne black, shorter than the face; third joint three times as long

as the second, slightly rufous at the base; arista thickened on the proximal half. Proboscis brown;

palpi rufous. Thorax and scutellum black, with some grey tomentum ; thoracic dorsum with four distinct

broad black stripes. Abdomen ovate, bluish-black, the second and third segments with whitish reflecting

spots and narrow white front borders; besides the marginal macrocheté on the second and third, there

are two discal ones on the third segment and several on the anal segment. Legs black; middle tibie

outwardly with some long bristles; hind tibise: outwardly with several longer and shorter bristles.

Tegule yellowish-grey. Wings greyish-hyaline; small cross-vein on the middle of the discal cell;

curvation of the fourth vein with an acute angle; apical cross-vein very concave and arcuated over its

whole length; posterior cross-vein slightly curved.

Hab. Mexico, Sierra de las Aguas Escondidas, Guerrero, 7000 feet (H. H. Smith).

A single female specimen.

12. Mystacella setulosa, sp. n., 9.

Black ; head and the thorax anteriorly greyish, the latter with black stripes; abdomen with whitish reflections ;

palpi yellowish-red ; posterior tibiz dark rufous; small cross-vein before the middle of the discal cell.

Length 6°5 millin.

Allied to the preceding species, but differing in the following respects :—The head is not yellow, but greyish ;

the grey tomentum of the thorax is confined to the anterior portion; the black stripes on the thoracic

dorsum are narrower and less distinct; the abdomen has a bronze instead of a bluish tint ; discal macro-

cheetee are also on the second segment; the middle and hind tibie are dark rufous; the wings are

brownish at the base and on the costa; the small cross-vein is somewhat infuscated and distinctly before

the middle of the discal cell; the apical cross-vein is concave only at the base, and for the rest straight ;

the bristles of the head, body, and legs are comparatively longer.

Hab. Muxico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single female specimen.

MEIGENTA.

Meigenia, Robineau-Desvoidy, Essai sur les Myodaires, p. 198 (1880).

Spilosia, Rondani, Dipterol. Ital. Prodr. iii. p. 111 (1859).

This genus agrees with Mystacella and Brachycoma in having the vibrisse inserted

at some distance above the oral margin. It differs from both by the curvation of the

fourth vein forming a blunt angle, and by the straight (not concave) apical cross-vein ;

from Mystacella it may be distinguished, moreover, by the more elongate abdomen,

this latter being not broadly ovate, but conical. The eyes are pilose, though less

conspicuously so than in Mystacella; in Brachycoma (some of the species of which

have also a conical abdomen), on the contrary, the eyes are absolutely bare.

I must refer three species from Central America to the genus Meigenia.

MEIGENIA. 59

1. Palpiblackk . 2. 1. 1. 1 1. ew ew ee ee tw we ee albidula, v. d. Walp.

Palpirufous. 2. . 1... ee ee ee eee ee

2. Thorax blackish, without stripes; small cross-vein before the

middle of the discal cell . . . 2 +e + ee ee + +) flaviventris, v. d. Wulp.

Thorax ochraceous, with black stripes; small cross-vein on the

middle of the discal cell . . . . . ee eee ee gratiosa, v. d. Wulp.

1. Meigenia albidula, sp.n.,?. (Tab. III. figg. 6, 6a, head in profile, ¢ .)

Light cinereous ; frontal band, four stripes on the thorax, the broad hind borders of the abdominal segments,

antenne, palpi, and legs black.

Length 7 millim.

Front a little narrower than the diameter of the eyes, pale ochraceous with brownish reflections ; frontal band

black, narrowed towards the vertex; frontal bristles descending on both sides in a single row, to the

number of four, beneath the root of the antennz; face pale yellow; pilosity of the eyes conspicuous only

when viewed under the lens. Antenne black, shorter than the face; basal joints short; second joint

bristly on the upper part; third joint four times as long as the second; arista thickened at the base.

Thorax pale cinereous, with four black stripes—the outer stripes reaching nearly the whole length, and the

inner ones scarcely prolonged behind the transverse suture ; scutellum grey, blackish at the base. Abdomen

conical, whitish-grey ; first segment black ; the following segments with broad black hind borders, which

have a diffuse limitation owing to the blackish reflections; viewed in some directions a black dorsal

stripe appears ; second and third segments without macrochete (perhaps they are broken off). Tegule

grey, with a yellowish margin. Wings with a brownish-grey tint; small cross-vein nearly on the middle

of the discal cell; curvation of the fourth vein forming a blunt angle ; apical cross-vein straight; posterior

cross-vein sinuate ; end of the apical cell at a little distance from the wing’s tip.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

2. Meigenia flaviventris, sp. n., 2.

Thorax blackish; scutellum grey ; abdomen yellowish, with white reflections and blackish spots; antenne

and legs black ; palpi rufous; hind tibie outwardly fringed.

Length 5:5 millim. .

Head whitish; front narrowed behind and there narrower than the eyes; frontal band blackish, narrow ;

frontal bristles descending on both sides in a single row beneath the root of the antenne ; eyes slightly

pilose. Antennee shorter than the face ; third joint three times as long as the second; arista thickened

on the proximal half. Thorax blackish, without stripes. Abdomen conical, yellowish-rufous, somewhat

transparent, and with white reflections ; first segment black ; second and third with two obsolete blackish

spots, the third and the anal segments with a blackish hind border ; macrochsete very short and incon-

spicuous among the black hairs, those of the anal segment more distinct. Hind tibie outwardly fringed .

with bristles. Tegule whitish. Wings greyish-hyaline; small cross-vein distinctly before the middle of

the discal cell; curvation of the fourth vein with a blunt angle; apical cross-vein straight; posterior

cross-vein slightly curved.

Had. Mexico, Orizaba (coll. Bellardi).

A single female specimen in the collection of Prof. Bellardi.

In its general facies this species much resembles the European forms (I. bisignata

and M. floralis).

60 DIPTERA.

8. Meigenia gratiosa, sp. n., 3.

Ochraceous; stripes on the thorax, base of the scutellum, hind borders of the abdominal segments, antennsy,

and legs black; palpi rufous.

Length 6 millim.

Head cinereous; front narrowed behind; frontal band blackish ; frontal bristles descending on both sides in

asingle row to beneath the second antennal joint ; eyes beneath not reaching the vibrissx, densely clothed

with short pile, which is whitish on the upper part and more obscure below; vibrisse surmounted by

several bristles; beard white. Antenne shorter than the face; second joint with some short and rough

bristles ; third joint three times as long as the second ; arista thickened on the proximal half. Proboscis

black; palpi pale rufous. Thorax, scutellum, and abdomen ochraceous; thoracic dorsum with five black

stripes, the three median stripes linear; base of the scutellum black. Abdomen conical; first segment

black ; second and third segments with black hind borders, which anteriorly are drawn out into three

branches, the lateral branches the broadest and somewhat trigonal ; anal segment in the middle and at the

tip black, beneath with a black spine, which is turned towards the venter; ventral face blackish ; discal and

marginal macrochete present. Legs with delicate bristles, those of the middle tibie longer, those on the

outside of the hind tibie of unequal length ; foot-claws and pulvilli elongate, the pulvilli greyish. Tegule

yellow. Wings greyish, slightly infuscated at the base and costa; small cross-vein on the middle of the

discal cell; apical cell ending a little before the wing’s tip; apical cross-vein nearly straight ; posterior

cross-veln curved.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

A single male specimen.

EXORISTA.

Exorista, Meigen, Ill. Magaz. ii. p. 280 (1803).

Of this genus, which I adopt in the sense of Schiner (‘ Fauna austriaca,’ i. p. 457), I

have before me examples of several species from Central America, none of which can be

identified with either of those yet described. They may be distinguished as follows :—

1. Second and third abdominal segments with discal and marginal

macrochete*. . . . . oe . woe ew we

Second and third abdominal segments without discal and only

with marginal macrocheetz, sometimes even these latter absent 9.

2. Palpiblack ©. 2. 2. 1. 1. ee 1 ew ee ee ee . obscurata, v. d. Wulp.

Palpirufous . ... . rr Pe

3. Thorax unicolorous black, without stripes . . . . . . . wnicolor, v. d. Wulp.

Thorax grey, cinereous, or ochraceous, with more or less con-

spicuous dark stripes . . . 4.

4, Abdomen with rather narrow and sharply limited black hind

borders to the segments . . . . 2... ee ee OD

Abdomen otherwise marked. . . . . . ...... 6

5. Ground-colour ochraceous . . . . . . . « « . « « ochracea,y. d. Wulp.

Ground-colour cinereous, the last two abdominal segments

bluish 2. 2. we. ew we we... c@ruleiventris, v. a. Wulp.

* In E. unicolor the macrochztz, and especially the discal ones, are very short and less conspicuous between

the pilosity of the abdomen.

12.

13.

14.

17.

18.

. Scutellum rufous ;

. Thorax with four distinct black stripes

. Anal segment, or at least the anus, red

EXORISTA.

Abdomen cinereous, with broad black hind borders to the

segments . : . rr

Abdomen black, with grey or white reflections .

abdomen broadly ovate .

Scutellum black or greyish; abdomen conical .

Thorax with obsolete stripes .

Anal segment not differing in coloration from the preceding

segments; anus grey or black

. Antenne rufous .

Antenne black .

. Palpi black

Palpi rufous .

Hind tibiae outwardly fringed .

Hind tibiz outwardly with bristles of unequal length

Frontal bristles short, descending close together and somewhat

irregularly beneath the root of the antenne (3); frontal

band narrower than the lateral portion, and the terminal joint

of the front tarsi not dilated ( ) woe eee

Frontal bristles longer, and forming on each side a single

regular row (3); frontal band as broad as the lateral portion,

and the terminal joint of the front tarsi dilated (?) .

Scutellum black, with a grey hind margin; second and third

abdominal segments black, with grey reflections and white

front borders . ee .

second and third abdominal segments

cinereous, with black hind borders and a black dorsal stripe.

Scutellum cinereous ;

. Terminal lips of the proboscis yellow; thorax ent bluish-grey,

with obsolete stripes . . . .

Terminal lips of the proboscis black or . brown *; thorax other-

wise coloured and usually with distinct black stripes .

3. Thorax with three distinct black stripes, which are prolonged

behind the transverse suture; anteriorly on each side of the

median stripe a black line t oe .

Thorax with four black stripes, or the stripes less conspicuous.

Scutellum testaceous; palpi rufous . .

Scutellum black, with a greyish hind border; palpi black .

Anal segment with a greyish front border; larger species (10

millim.)

ordinaria, v. d. Wulp.

7. .

brevis, v. d. Wulp.

elongata, v. d. Wulp.

. hispida, v. d. Wulp.

. 10.

15.

rubricornis, v. d. Wulp.

ll.

latevittata, v. d. Wulp.

12.

13.

14.

tricolor, v. d. Wulp.

latimana, v. d. Wulp.

consobrina, v. d. Wulp.

sororcula, v. d. Wulp.

flavirostris, v. d. Wulp.

16.

17.

19.

interstincta, v. d. Wulp.

18,

trivittata, v. d. Wulp.

* In some specimens of E. angustata and E. griseomicans the terminal lips of the proboscis are rufous; in

these examples, however, the thorax has not a bluish tint, but is grey with very distinct black stripes.

+ Compare also the description of H. tenwipalpis on p. 73.

19.

20.

21.

22.

23.

24.

26.

DIPTERA.

Anal segment black, only laterally with a whitish reflection ;

smaller species (5°5 millim.) . . . . 2... . ee

Abdomen conical . .

Abdomen ovate . . . .

Body grey, with black markings; larger species (12 millim.)

Body shining black, with whitish markings; smaller species

(6°5 millim.}

Palpi black

Palpirufous . . . . . . 1 ew ee eee

Hind tibiz outwardly fringe-like with bristles. . . .

Hind tibie outwardly with bristles of unequal length

‘Abdomen shining black or piceous (sometimes laterally tes-

taceous), with more or less conspicuous whitish reflections

Abdomen grey or cinereous (sometimes laterally testaceous),

with blackish reflecting spots or black hind borders to the

segments . oe

Scutellum black .

Scutellum piceous orrufous. . . . . .....

. Palpi normal; vibrisse scarcely longer than the other bristles

onthe oral margin. . . .... ee ee

Palpi filiform ; vibrisse distinctly longer than the other bristles

on the oral margin . . .

Face laterally ochraceous

Face whitish .

1. Exorista obscurata, sp. n., ¢.

Head and thorax ochraceous ; abdomen grey; frontal band, antenna, palpi, four thoracic stripes, hind borders

nigricauda, v. d. Wulp.

20.

21. ,

angustata, v. d. Wulp.

exilis, v. d. Wulp.

22.

23.

ignobilis, v. d. Wulp.

humilis, v. d. Wulp.

24:.

26.

maura, v. d. Wulp.

25.

glabricula, v. d. Wulp.

tenuipalpis, v. d. Wulp.

flavicans, v. d. Wulp.

griseomicans, v. d. Wulp.

of the abdominal segments, and legs black; abdomen with discal and marginal macrochete ; wings

infuscated along the costa.

Length 8 millim.

Front ochraceous, narrower than the diameter of the eyes; frontal bristles descending on both sides in a single

row beneath the second antennal joint; face and cheeks pale yellow; vibrissa surmounted by some

shorter bristles ; beard whitish ; eyes pubescent. Antenne shorter than the face ; second joint bristly on

its upper part; third joint three or four times as long as the second ; arista thickened not quite to the

middle. The stripes of the thorax very conspicuous, abbreviated behind, especially the middle ones ; the

outer stripes interrupted on the transverse suture; scutellum cinereous. Abdomen conical, greyish-

cinereous ; the first segment black, the following segments with broad black hind borders ; macrochete

in the middle as well as on the hind margins of the segments. Middle tibiee with two long bristles, one on

the outer and one on the inner side; hind tibie outwardly with a row of short and with some longer

bristles ; foot-claws anc pulvilli elongate, the pulvilli brownish-yellow. Tegule yellowish-grey. Wings

slightly infuscated on the anterior half or along the costa; small cross-vein on or a little before the

middle of the costal cell; apical cross-vein straight ; posterior cross-vein distinctly curved.

Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith).

Five male specimens.

EXORISTA. 63

2, Exorista unicolor, sp. n., ¢.

Shining black ; thorax without stripes; head with silvery reflections; abdomen with some grey tomentum ;

macrocheetee very short ; palpi rufous.

Length 7 millim.

Head obscure, with silvery-white reflections ; front narrowed behind, on the vertex as broad as the diameter

of the eyes ; frontal band black; frontal bristles descending on both sides in a curved row to beneath the

second antennal joint ; above the vibrisse a row of shorter bristles, which mount up to nearly half of the

face. Eyes pubescent. Antenne black, a little shorter than the face ; second joint bristly ; third joint

four times as long as the second; arista thickened on the proximal half. Proboscis black ; palpi rufous,

with short black hairs. Thorax and scutellum unicolorous shining black. Abdomen broadly ovate,

shining black, with a slight whitish or greyish tomentum on the front border of the second and third

segments, in which appears a black dorsal line; discal and marginal macrochete present, but very short

and less conspicuous among the black pile which covers the abdomen. Legs black; the front and the

hind tibie outwardly with a row of bristles; middle tibize with some longer bristles; foot-claws and

pulvilli short. Tegule yellowish-grey. Wings hyaline ; small cross-vein on the middle of the discal cell ;

apical and posterior cross-veins oblique and nearly straight, the latter inserted at or just beyond the

middle between the small cross-vein and the curvation of the fourth vein.

Hab. Mexico, Cuernavaca in Morelos, Venta de Zopilote 2800 feet, and Amula

6000 feet, in Guerrero (H. H. Smith), Santiago Iscuintla in Jalisco (Schumann).

Several female specimens.

3. Exorista ochracea, sp. n., 3 ¢.

Ochraceous; frontal band, antenne, hind borders of the abdominal segments, and legs black; thorax with

black lines ; abdomen with discal and marginal macrochete ; palpi rufous.

Length 5:5-7 millim.

Front ochraceous with brownish reflections, nearly as broad as the diameter of the eyes, in the male narrower

behind; frontal bristles descending on both sides in a single curved row beneath the root of the antenne ;

face whitish; vibrissze surmounted by some shorter bristles. Eyes thinly pilose, in the female sometimes

only slightly pubescent. Antenne shorter than the face ; third joint four times as long as the second;

arista thickened to nearly half its length. Proboscis black; palpi pale rufous, exserted. Thorax and

scutellum bright ochraceous; thoracic dorsum with four black lines, the outer lines largely interrupted

on the transverse suture, and the inner ones not prolonged behind it; pleure greyish. Abdomen broadly

ovate, ochraceous, with brown reflections; the first segment and a narrow hind border to the following

two segments black. Middle tibie with some long bristles; foot-claws and pulvilli elongate in the

male; the pulvilli pale yellow. Tegule yellowish. Wings greyish-hyaline; small cross-vein a little

before the middle of the discal cell; apical cross-veia slightly concave or nearly straight (the apical cell

ending at a short distance from the wing’s tip); posterior cross-vein curved.

Hab. Mexico, Amula 6000 feet, Xucumanatlan 7000 feet, and Omilteme 80U0

feet, in Guerrero, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith) ; Costa Rica,

Rio Sucio (Rogers).

Several specimens of both sexes.

E. ochracea bears a striking resemblance to Mystacella fuscicostalis (p. 57); but

differs in having the vibrisse inserted quite at the oral margin, the costa of the wings

not infuscated, and the stripes on the thorax more linear. Mr. Smith has noted that

living specimens are sometimes marked with golden-green and have the scutellum

bronze. Some indications of this coloration are visible in dried examples,

64 DIPTERA.

4. Kxorista ceruleiventris, sp. n., °.

Cinereous ; frontal band, antenne, a narrow hind border to the abdominal segments, and legs black ; abdomen

with a bluish reflection, and with discal and marginal macrochete; palpi pale rufous.

Length 8 millim.

Front cinereous, broader than the diameter of the eyes; frontal band narrower than the lateral portions ; frontal

bristles descending on both sides to the number of three beneath the root of the antenne ; face and

cheeks whitish ; vibrissee surmounted by some shorter bristles. Eyes with a short greyish pile. Antenne

a little shorter than the face ; third joint nearly four times as long as the second; arista thickened for not

quite half its length. Thorax, scutellum, and abdomen with a yellowish-cinereous tomentum; thoracic

dorsum with four dark lines, the outward lines disappearing behind the transverse suture. Abdomen

broadly ovate, convex; the last two segments with a peculiar bluish reflection ; first segment and a narrow

hind border to the following segments, black. Front tibise outwardly with a row of short bristles; middle

tibi with some long bristles ; foot-claws and pulvilli short. Tegule greyish-yellow. Wings greyish,

slightly infuscated on the costa and along some of the veins ; small cross-vein distinctly before the middle

of the discal cell; apical cross-vein concave ; posterior cross-vein curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

5. Exorista ordinaria, sp. n., ¢ ¢.

Cinereous ; frontal band, antenne, four thoracic stripes, hind borders of the abdominal segments, and legs

black; abdomen with discal and marginal macrochete ; palpi rufous.

Length 5°5—7 millim.

Front with a slight ochraceous tint, in the male narrower than the diameter of the eyes, in the female broader ;

frontal bristles descending on both sides in a curved row, to the number of three or four, beneath the root

of the antenne ; face and cheeks whitish ; vibrisse surmounted by some shorter bristles ; beard whitish ;

eyes thinly pilose. Antenne black; second joint bristly ; third joint three or four times as long as the

second ; arista thickened for nearly half its length. Proboscis black; palpi pale rufous. Thorax with a

greyish-cinereous, on the shoulders somewhat ochraceous, tomentum, and with four black stripes, which

are interrupted at the transverse suture; scutellum cinereous, blackish at the base. Abdomen conical,

longer than the thorax ; first segment black, the others cinereous with black reflections, the black colour on

these latter usually appearing as a broad hind border to the segments. Legs rather strong ; intermediate

tibize with a long and stout bristle on the outer side below the middle and another still lower down on the

inside; the outer edge of the hind tibie with shorter, partly with long bristles ; foot-claws and pulvilli

elongate in the male, the pulvilli yellowish. Tegule whitish. Wings nearly hyaline; small cross-vein

before the middle of the discal cell; apical cross-vein rather straight; posterior cross-vein slightly curved.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet, Medellin near Vera Cruz,

Teapa in Tabasco (H. H. Smith).

Three male and two female specimens.

6. Exorista brevis, sp. n., 9.

Ovate, blackish, partly with greyish tomentum; thoracic stripes obsolete; frontal band, palpi, and scutellum

rufous ; abdomen not longer than the thorax, with discal and marginal macrochete.

Length 6°5 millim.

Front somewhat broader than the eyes, blackish, with white reflections; frontal band dark rufous; frontal

bristles descending to beneath the end of the second antennal joint; face and cheeks white, the cheeks

silvery. Antenne black; second joint rufous at the tip; third joint three times as long as the second ;

arisia slightly thickened at the base. Proboscis black; palpi rufous. Thorax black, anteriorly and

EXORISTA. | 65

laterally with some white tomentum; thoracic dorsum before the transverse suture with four black lines,

which are sometimes obsolete ; scutellum rufous. Abdomen broadly ovate, blackish, with irregular whitish

or greyish reflecting spots, densely beset with bristly hairs and having discal and marginal macrochete ;

anal segment laterally slightly rufous. Legs black, the tibiz piceous ; hind tibia outwardly with bristles

of unequal length. Tegule whitish. Wings greyish-hyaline; small cross-vein before the middle of the

discal cell ; apical and posterior cross-veins slightly curved, nearly straight.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen.

7. Kxorista elongata, sp.n, ¢. (Tab. III. figg. 8, 8a, head in profile, ¢ .)

Oblong, black ; head pale yellow; palpi dark rufous ; thorax cinereous, with four black stripes; abdomen with

the front margins of the segments white, and with discal and marginal macrochete ; base and costa of

the wings infuscated.

Length 10 millim.

Front narrowed behind; frontal band black; frontal bristles rather stout, descending on both sides in a curved

row as far as the end of the second antennal joint; vibrissee surmounted by several shorter bristles; beard

yellowish-grey. Eyes pubescent. Antenne black; second joint short ; third joint three or four times as

long as the second ; arista thickened to one third of its length. Thorax greyish-cinereous, with four

black stripes, the outer stripes prolonged behind the transverse suture; pleure whitish-grey ; scutellum

black, with the hind margin grey. Abdomen elongate-conical ; first segment black, if anything shorter

than either of the following segments, which are black with grey reflections and a white front margin,

the second segment at the sides slightly testaceous ; macrochete long and abundant, on the second and

following segments in the middle and on the hind margins. Legs black, long and slender, with stout

bristles, especially on the middle tibie ; foot-claws and pulvilli elongate. Tegule cinereous, with a pale

yellow margin. Wings greyish, somewhat infuscated at the base and along the costa; curvation of the

fourth vein forming a blunt angle; apical cross-vein straight ; posterior cross-vein a little curved, inserted

on two-thirds of the apical cell.

Hab. Costa Rica, Cache (Rogers).

A single male specimen.

Two other male specimens, from Medellin near Vera Cruz (HZ. H. Smith), are of a

smaller size, and without the infuscation on the wings; they probably belong to a

variety of the same species.

In the elongate shape of the body and legs L. elongata resembles some species of

Macquartia ; but, owing to the third antennal joint being much longer than the second,

the end of the apical cell more removed from the wing’s tip, and the broader front (in

the male), it is better placed in the genus Frorista.

8. Exorista hispida, sp. n., ¢ ¢.

Black, setose ; head pale ochraceous; third antennal joint more or less rufous; thorax somewhat greyish ;

abdomen with white and grey reflecting spots, and with discal and marginal macrochete ; palpi pale

rufous.

Length 7 millim.

Front narrowed behind, on the vertex half as broad as the diameter of the eyes (¢ ), or a little narrower than

the eyes (Q); frontal band black ; frontal bristles robust, descending on both sides to the number of three

or four beneath the root of the antenne ; vibrisse rather strong, accompanied by several shorter bristles ;

pilosity of the eyes pale ochraceous or whitish, long and dense. Antenne a little shorter than the face ;

basal joints short, black ; second joint bristly ; third joint four times as long as the second, rather broad

BIOL. CENTR.-AMER., Dipt., Vol. II., February 1890. k

66 DIPTERA.

rufous, the front side and the tip with a blackish margin; in the female these organs are of a more obscure

colour, though the hind margin of the third joint is always somewhat rufous ; arista thickened almost to

the middle. Proboscis black; palpi yellowish-rufous. Thorax, scutellum, and abdomen shining black ;

thorax anteriorly with a greyish tomentum and obsolete black stripes ; abdomen conical, with grey and

white reflecting spots, especially on the front margin of the second and following segments, and with =

many long discal and marginal macrochete. Legs black, the tibie piceous; middle and hind tibie

outwardly with long bristles ; foot-claws and pulvilli of the male elongate, the pulvilli whitish. Tegule

white. Wings greyish-hyaline, in the female somewhat brownish ; small cross-vein thick, before the

middle of the discal cell; apical cross-vein concave at its origin, for the rest straight; posterior cross-vein

slightly curved.

Hab. Mexico, Orizaba (H. H. Smith & F. D. G.), Omilteme in Guerrero 8000 feet

One female and two male specimens.

9. Exorista rubricornis, sp. n., 2.

Grey ; antennex and palpi rufous; thorax with four black stripes; abdomen without discal macrochsete, black,

except the anal segment, which is rufous, the front borders of the segments whitish ; legs black.

Length 7-5 millim. |

Front as broad as the diameter of the eyes ; frontal band black, narrower than the grey lateral portions ; frontal

bristles descending to the number of three or four beneath the root of the antennee ; face and cheeks with

silvery reflections; beard and pilosity of the occiput whitish; eyes with yellowish pile. Antenne rufous,

nearly as long as the face ; second joint elongate, with black bristles on its upper part; third joint two or

three times as long as the second, its front margin more or less infuscated; arista black, gradually tapering

towards the end. The black stripes of the thoracic dorsum conspicuous over nearly its whole length ;

scutellum with a slight rufous tint, which, however, is scarcely visible through the grey tomentum with

which it is covered. Abdomen ovate, shining black ; the second and third segments with whitish front

borders and laterally slightly rufous; anal segment rufous, with some white reflections on the front

border ; ventral face brown, with a similar white reflection, which, however, is more defined and forms

transverse bands attenuated on either side. Legs black, the underside of the femora whitish ; bristles not

very strong; hind tibies outwardly fringed with short bristles. Tegule white. Wings greyish ; small

cross-vein oblique, on the middle of the discal cell; apical and posterior cross-veins curved. .

Hub. Muxtco, Atoyac in Vera Cruz (H. H. Smith), Temax in North Yucatan

(Gaumer). |

Two female specimens.

10. Exorista latevittata, sp. n., ¢. |

Thorax grey, with four broad black stripes, two and two united behind the transverse suture ; abdomen black,

laterally reddish, with the front margins of the segments white; anus more or less rufous; hind tibie

outwardly fringed ; palpi black.

Length 9°5 millim.

Head whitish-grey; front narrower than the diameter of the eyes; frontal band black; frontal bristles

descending on both sides in a single row beneath the second antennal joint; vibrissze surmounted by some

shorter bristles; beard and pilosity of the occiput whitish; eyes densely beset with a yellowish pile.

Antenne black, shorter than the face; second joint bristly on the upper part; third joint three or four

times as long as the second, sometimes slightly rufous at the extreme base; arista thickened on the

proximal half. The stripes on the thoracic dorsum as broad as the interspaces; scutellum black, brownish

towards the hind margin. Abdomen broadly ovate, black, the sides of the second and third segments

reddish-yellow, the latter with a narrow, white front margin; anus in one of the specimens slightly, in

EXORISTA. 67

the others more distinctly, rufous; only on the hind margin of the third segment is a row of macrochete ;

anal segment with many shorter bristles. Legs black; front tibiee outwardly with a row of short bristles ;

middle tibie with some long bristles; hind tibie fringed on the outside; foot-claws and pulvilli elongate,

the pulvilli greyish-yellow.. Tegule whitish. Wings greyish-hyaline, the base and costal cell of a dilute

brownish colour; small cross-vein on the middle of the discal cell; third vein curved upwards before its —

end; apical and posterior cross-veins slightly curved.

Hab. Mexico, Dos Arroyos 1000 feet, Tierra Colorada 2000 feet, Xucumanatlan

7000 feet, and Omilteme 8000 feet, all in Guerrero, Atoyac in Vera Cruz, Teapa in

Tabasco (H. H. Smith), Orizaba (coll. Bellard?).

Several male specimens.

11. Exorista tricolor, sp.n., ¢ 2. (Tab. III. fig. 9.)

Cinereous ; four thoracic stripes, antenne, and legs black; hind margins of the abdominal segments black,

sometimes (in the male) testaceous ; anus and palpi rufous; no discal macrochetz ; hind tibie outwardly

fringed. — :

Length 10°5 millim.

Head pale ochraccous, the front narrowed behind; frontal band black, in the female narrower than the lateral

portions ; frontal bristles short, on both sides descending in a double row, or somewhat irregularly, as far

as the end of the second antennal joint; the bristles on the vertex more robust ; vibrisse accompanied by

some shorter bristles; beard and pilosity of the occiput pale yellow; behind the posterior orbits of the

eyes a row of short black bristles. Eyes with a short but dense pile. Antenne shorter than the face ;

second joint pilose on the front side; third joint three times as long as the second ; arista thickened on

the proximal haif. Thorax light cinereous, with four broad black stripes which are united two and two

behind the transverse suture, and between which appear longitudinal rows of bristles; scutellum piceous

or somewhat testaceous, with grey hind margin. Abdomen broadly ovate; first segment black, at the sides

slightly rufous; second and third segments in the male testaceous, though very obscurely so on the dorsal

portion, in the female black, in both sexes with whitish front borders, which are interrupted by a black

dorsal stripe and are more extended at the sides; anal segment rufous, with grey reflections on the front

border ; macrochets only on the posterior margin of the third segment, rarely a pair on that of the

second; anal segment with several shorter macrochetx, which are not very conspicuous owing to the

black pile. Front tibize outwardly with short bristles ; middle tibiae: with two longer bristles; hind tibie

outwardly fringed. Tegule bone-white. Wings greyish, with some yellow tint at the base and on the

costa; small cross-vein oblique, on, or a little beyond, the middle of the discal cell; apical cross-vein

nearly straight; posterior cross-vein curved, on more than two-thirds of the apical cell.

Hab. Mexico, Acaguizotla in Guerrero 3500 feet, Cuernavaca in Morelos, Atoyac in

Vera Cruz, Teapa in Tabasco (H. H. Smith); Costa Rica, Cache (Rogers).

Nine male and three female specimens.

12. Exorista latimana, sp.n., ¢ 9. (Tab. III. fig. 10, anterior tarsus of the

female.)

Cinereous ; four thoracic stripes, antenne, and legs black ; palpi rufous; abdomen black, with the front margin

of the second and third segments whitish ; anus rufous; hind tarsi outwardly fringed ; terminal joint of

the front tarsi enlarged in the female; no discal macrochete on the second and third segments.

Length 6°5--10 millim. . .

Closely allied to the preceding species (£. trecolor), and not easily to be distinguished from it. In the male the

testaceous coloration on the abdomen is more confined to the sides of the intermediate segments; the

68 DIPTERA.

frontal bristles are less numerous and form a more regular curved row on either side of the frontal band.

In the female the frontal band is as broad as the lateral portion; the scutellum is black, with’a greyish —

hind border; the fourth joint of the front tarsi is very short, and the terminal joint is distinctly dilated

and elliptical (which is not the case in the female of £. tricolor). In some specimens the thoracic stripes

are two and two united, and thus form two broad black bands.

Hab. Mexico, La Venta 300 feet, Tierra Colorada 2000 feet, Amula 6000 feet,

Xucumanatlan and Sierra de las Aguas Escondidas 7000 feet, all in Guerrero, Atoyac

and Medellin in Vera Cruz, Teapa in Tabasco (H. H. Smith), Orizaba (F. D. G. &

H. H. Smith).

Several specimens of both sexes; the species is also represented in the collection of

Prof. Bellardi.

13. Exorista consobrina, sp. n., 2.

Cinereous; frontal band, antenne, four thoracic stripes, scutellum, and legs black ; abdomen black, with white

reflections on the front borders of the segments ; no discal macroch#te on the second and third segments ;

anal segment and palpi rufous; hind tibie not fringed, but with bristles of unequal size.

Length 6 millim.

This species, of which we have but a single female specimen, is nearly allied to the two preceding ; it is of a

much smaller size than most specimens of F. tricolor and E. latimana, and differs from both these in the

bristles on the outside of the hind tibie being less in number and of unequal length, and therefore not

fringe-like. The face is more purely white, contrasting with the ochraceous coloration of the front; the

scutellum is black, with a greyish hind border; the second and third abdominal segments are shining

black, with white front margins and lateral greyish-white reflecting spots ; the anal segment is rufous, with

similar whitish reflections; on the hind margin of the second segment is a pair of dorsal macrochete ;

on that of the third segment a row of macrochete ; similar rows of macrochete are on the middle and at

the end of the anal segment.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female.

14. Exorista sororcula, sp. n., ¢.

Cinereous ; frontal band, antennz, four thoracic stripes, a dorsal stripe on the abdomen, and the hind margins

of the segments of the latter black; anal segment and palpi rufous; legs black ; hind tibiz not fringed,

but with some bristles of unequal size; no discal macrochete on the second and third abdominal

segments.

Length 7 millim.

This species agrees in almost all its characters with the foregoing, but differs from it in the less obscure

coloration. The black stripes on the thorax are narrower and not united posteriorly, the intermediate

stripes being scarcely prolonged behind the transverse suture; the scutellum is wholly cinereous; the

second and third abdominal segments are of the same colour, with some brown reflections, rather narrow

black hind margins, and a black dorsal stripe. The bristles on the outside of the hind tibie are still less

numerous than in £. consobrina. The frontal bristles descend on both sides in a double row, or some-

what irregularly, beneath the root of the antenne.

Hab. Mexico, Cuernavaca in Morelos (H. H. Smith).

A single female specimen.

EXORISTA. 69

15. Exorista flavirostris, sp.n.,¢ @. (Tab. III. fig. 7; 7a, head in profile.)

Thoracic dorsum bluish-grey ; scutellum testaceous ; abdomen light cinereous, with brown reflections and black

hind borders to the segments; antenne and legs black; palpi and terminal lips of the proboscis

yellowish-rufous.

Length 9 millim.

Head yellowish-white ; front (at least in the male) less broad than the diameter of the eyes; frontal band

black; frontal bristles descending on both sides to the number of three beneath the root of the antenne ;

vibrissze surmounted by some shorter bristles. Eyes with a rather dense and long pile. Antenne a

little shorter than the face ; second joint with short bristles; third joint five or six times as long as the

second ; arista thickened to one-third of its length. Proboscis black at the base, its large terminal lips

yellowish-rufous ; palpi yellowish-rufous, rather thick. Thoracic dorsum with a bluish-grey tomentum

and four obsolete dark lines; pleure: cinereous ; scutellum testaceous, partly covered with bluish tomentum

like that on the thorax. Abdomen ovate, whitish-cinereous, with brown reflections ; first segment black ;

the following segments with black hind borders and a black dorsal stripe; anus shining black; macro-

cheetee rather long, only at the hind margins of the segments ; in the male on each side of the anus is a

tuft of black hairs ; ventral face dark rufous, with whitish tomentum. Front tibie outwardly with a row

of short bristles; middle tibie with some longer bristles; the hind tibiee with the bristles on the outer edge

almost fringe-like, and with a longer bristle in the middle ; foot-claws and pulvilli elongate in the male,

short in the female, the pulvilli yellowish. Tegule whitish. Wings greyish-hyaline ; small cross-vein 4

little before the middle of the discal cell; apical cross-vein slightly curved; posterior cross-vein nearly

straight, inserted on two-thirds of the apical cell.

Hab. Mexico, Orizaba (coll. Bellardi), Teapa in Tabasco (H. H. Smith).

A male and three female specimens.

16. Exorista interstincta, sp. n., 2.

Ovate, cinereous ; thorax with three black stripes, on each side of the median stripe a black line ; scutellum

testaceous ; abdomen not longer than the thorax, variegated with black and cinereous; antenne and legs

black ; palpi rufous.

Length 5 millim.

Head greyish ; front a little broader than the eyes, with parallel sides; frontal band black ; frontal bristles

weak, descending to the end of the second antennal joint. Antenne shorter than the face, the second

joint showing a tendency to become rufous; third joint three times as long as the second ; arista thickened

on the proximal half. Proboscis black; palpi pale rufous. Thorax cinereous, with three broad black

stripes over its whole length ; anteriorly on either side of the median band a black line ; scutellum testa-

ceous, blackish at the base. Abdomen broadly ovate ; first segment black, the following segments cine-

reous with black reflections, which on the second and third segments usually appear in the form of two

trigonal spots at the hind borders and an interrupted dorsal band; on the anal segment the dorsal band

alone is conspicuous; on the hind margin of the second segment are two macrochete, on that of the

third segment a row of longer macrochzxte ; the anal segment is short and beset with bristly hairs. Legs

black; hind tibie slightly enlarged, outwardly fringed with short bristles, and with a longer bristle

below the middle. Tegule whitish. Wings greyish-hyaline ; small cross-vein a little before the middle

of the discal cell; apical cross-vein nearly straight ; posterior cross-vein slightly curved.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

A single female specimen.

70 DIPTERA.

17. Exorista trivittata, sp.n., ¢.

Grey ; thorax with three black stripes, on either side of the median stripe a black line; hind borders of the

abdominal segments, frontal band, antenne, palpi, and legs black.

Length 10 millim. (that of two of the specimens 6 millim. only).

Front ochraceous, with brown reflections, on the vertex less broad than the diameter of the eyes ; frontal

bristles descending on both sides in a single curved row beneath the second antennal joint; face and

cheeks pale yellow, the median portion of the face whitish ; vibrisse surmounted by some shorter bristles ;

beard whitish ; pilosity of the occiput pale yellow; eyes densely pilose. Antenne shorter than the face ;

second joint bristly on its upper part; third joint three times as long as the second ; arista thickened on

the proximal half, Thorax grey, with three broad black stripes over the whole length ; on either side of

the median stripe a black line, these lines prolonged behind the transverse suture but disappearing i in the

more general black coloration of the hind portion of the thorax; scutellum black, with a grey hind border

Abdomen conical, grey, the first segment and a broad hind border to the following segments black (in

some positions the third and fourth segments appear black with a narrow white front margin, in others a

black dorsal line is conspicuous); a pair of macrochate on the hind margin of the second segment and a ~

row of macrochete on that of the third and fourth segments; anus shining black, with the male genitals

somewhat exserted. Middle tibie outwardly with two long bristles and a similar bristle on the inner

side below the middle; hind tibise outwardly with almost fringe-like bristles ; foot-claws and pulvilli

elongate, the pulvilli yellowish. Tegule pale yellow. Wings greyish-hyaline, with a slight brownish

tint along the costa at the base; small cross-vein on the middle of the discal cell; apical cross-vein a

little concave at its base; posterior cross-vein faintly curved, sometimes nearly straight.

Hab. Mexico, Orizaba (coll. Bellardi), Atoyac in Vera Cruz, Teapa in Tabasco

(H. H. Smith).

Several male specimens.

18. Exorista nigricauda, sp. n., ¢.

Thorax grey, with three black stripes, on either side of the median stripe a black line; abdomen black, with

whitish front borders to the second and third segments; frontal band, antenne, palpi, and legs black.

Length 5:5 millim.

Allied to the preceding species (Z. érivittata), and resembling it, but of a much smaller size. The coloration of

the front is more whitish; the anal segment is black, without a greyish front border, and only laterally

with a whitish reflecting spot; the tegule are whiter; the third vein and the apical cross-vein are bent

upwards near their end; the posterior cross-vein is a little concave.

_ Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single male specimen.

19. Exorista angustata, sp. n., ¢(??).

Grey; frontal band, stripes on the thorax, hind borders of the abdominal segments, antenne, and legs black ;

palpi rufous at the tip.

Length 12 millim.

Of elongate form. Head whitish; front slightly prominent, scarcely narrowed behind, nearly as broad as the

eyes ; frontal band with parallel sides; frontal bristles on each side in a curved row, descending beneath

the end of the second antennal joint; cheeks rather broad, with silvery reflections. Antenne nearly

as long as the face; second joint short and bristly; third joint narrow, six times as long as the second ;

arista thickened on the proximal half. Proboscis black, with the terminal lips pale rufous ; palpi

eylindrical, rufous, black towards the base. Thorax, scutellum, and abdomen grey; thoracic dorsum

with four black stripes, the median stripes linear, the outer ones interrupted at the transverse suture.

Abdomen conical; first segment black ; second and third segments with black hind borders and blackish

EXORISTA. 71

reflections ; anal segment shining black, with the front margin laterally whitish ; macrocheete are on the

hind margins of the segments; ventral face blackish. Middle tibiee with some long bristles; hind tibia

outwardly with bristles of unequal length; foot-claws and pulvilli elongate, the pulvilli yellow. ‘Tegule

whitish. Wings with a brownish-yellow tint; small cross-vein on the middle of the discal cell; apical

and posterior cross-veins nearly straight.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single male specimen.

Three female examples from Amula, Guerrero, 6000 feet (H. H. Sinith), seem to

belong to this species. They agree with the above description of the male, but have

a less elongate form (their length is but 8 millim.); the coloration of the body is more

cinereous; the front is more yellowish and as broad as the eyes; the antenne are

broader, and their third joint not more than four times as long as the second ; the foot-

claws and pulvilli short; and the wings more hyaline.

20. Exorista exilis, sp. n., ¢

Shining black; head whitish; thorax with some whitish tomentum and obsolete stripes; abdomen conical,

the second and third segments with whitish front borders.

Length 6°5 millim.

Elongate. Front scarcely narrowed behind, nearly as broad as the eyes; frontal band black; frontal bristles

on both sides ina single row, descending to beneath the end of the second antennal joint; cheeks narrow ;

beard white. Antenne black, nearly as long as the face; second joint short, bristly; third joint six

times as long as the second; arista thickened in its basal third. Proboscis black ; palpi dark rufous.

Thorax and seutellum shining black; thoracic dorsum anteriorly with a whitish tomentum, in which

four black stripes sometimes appear; laterally a similar tomentum forms a whitish band between the

shoulders and the root of the wings; the pleure show some whitish reflections. Abdomen conical, longer

than the thorax, shining black; the second and third segments with whitish front borders, which are

broadly interrupted in the middle ; anal segment very shining and without any white reflection; macro-

chest are on the hind margins of the segments. Legs black; middle and hind tibis with some rather

long bristles; foot-claws and pulvilli elongate. Tegule whitish. Wings greyish-hyaline; small cross-

vein before the middle of, the discal cell; apical and posterior cross-veins very slightly curved, nearly

straight,

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

Two male specimens.

21. Exorista ignobilis, sp.n., 3.

Blackish ; thoracic dorsum anteriorly greyish with obsolete stripes; abdomen ovate, with whitish reflecting

spots, the second segment laterally testaceous.

Length 7 millim.

Head blackish ; front narrowed behind; frontal band black; frontal bristles short, descending in a double

row, or somewhat irregularly, beneath the root of the antenne; cheeks narrow, with whitish reflections.

Antenne black, shorter than the face; second joint short; third joint four times as long as the second ;

arista thickened in its proximal half. Proboscis and palpi black, the palpi cylindrical, densely clothed

with short hairs. Thorax and scutellum shining black ; thoracic dorsum anteriorly with grey tomentum

and the commencement of four black stripes; on the pleuree a whitish band extending from the shoulders

to the middle cox. Abdomen broadly ovate, blackish, with grey and whitish reflecting spots (sometimes

with a black dorsal stripe and black hind borders to the segments), and densely beset with black hairs ;

the second segment is laterally testaceous (on the ventral side this colour is also extended over the third

DIPTERA.

segment) ; macrochete are only at the hind margin of the third segment and on the anal segment. Legs

black; middle tibiee with some long bristles; hind tibie outwardly fringe-like with bristles and with a

longer bristle below the middle; foot-claws and pulvilli slightly elongate, the pulvilli yellowish. Tegule

whitish. Wings nearly hyaline; small cross-vein a little before the middle of the discal cell ; apical and

posterior cross-veins oblique, the apical nearly straight, the posterior distinctly curved.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single male specimen.

92. Exorista humilis, sp.n., ¢.

Shining black ; head whitish ; thorax with whitish tomentum and black stripes; abdomen ovate, with grey

front borders to the segments,

Length 6 millim.

Front as broad as the eyes, scarcely narrowed behind ; frontal band black, narrower than the lateral portions,

which are blackish with a white reflection; frontal bristles on both sides descending in a curved row to

just beneath the end of the second antennal joint; face and cheeks white, with grey reflections ; pilosity

of the eyes only conspicuous when viewed under a lens ; vibrisse surmounted by several shorter bristles.

Antenne black, nearly as long as the face; second joint short, bristly ; third joint five times as long as

the second; arista thickened in its proximal half. Proboscis and palpi black, the palpi thicker towards

the tip. Thoracic dorsum with a whitish tomentum and four black stripes; a fifth, median, stripe is less

conspicuous ; scutellum black. Abdomen ovate, pointed towards the anus, shining black, with a somewhat

bronze tint, grey or cinereous reflections, and whitish front borders to the segments ; long macrochete

are on the hind margins of the second and third segments, and several on the anal segment. Legs black;

middle tibiae with some long bristles ; hind tibie outwardly with bristles of unequal length ; foot-claws

and pulvilli elongate, the pulvilli whitish. YTegulw grey, with a yellowish margin. Wings greyish-

hyaline ; small cross-vein distinctly before the middle of the discal cell; apical and posterior cross-veins

nearly straight.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single male specimen.

93. Exorista maura, sp. n., 2.

Black ; head whitish ; thorax greyish, with black stripes ; palpi rufous; small cross-vein before the middle of

the discal cell.

Length 10 millim.

Head white, with dark grey reflections; front broader than the eyes; frontal band blackish-brown, narrow ;

frontal bristles descending to the number of four beneath the root of the antenna ; pilosity of the eyes

short, yellowish ; beard white. Antenne black, shorter than the face; second joint bristly; third joint

four times as long as the second; arista thickened in its proximal half. Proboscis black ; palpi exserted,

pale rufous, infuscated at the base. Thorax with grey tomentum, especially anteriorly and on the pleure ; _

thoracic dorsum with four black stripes; sometimes a fifth stripe appears between the two median stripes ;

scutellum black. Abdomen ovate, convex, shining black, with a slight bluish tint; the second and third

segments have very narrow whitish front borders, the second also with greyish reflections, which in the

middle are interrupted by a black dorsal stripe ; macrocheet# are on the hind margins of all the segments,

and there are several on the anal segment. Legs black; middle tibie with some long bristles; hind

tibie outwardly fringe-like with short bristles. Tegule whitish. Wings greyish-hyaline; small cross-

vein perpendicular and before the middle of the discal cell; apical cross-vein nearly straight ; posteriox

cross-vein slightly curved.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

Two female specimens.

EXORISTA. 73

24, Exorista glabricula, sp. n., ¢.

Black ; head whitish; thorax greyish, with black stripes; scutellum and sides of the abdomen testaceous ;

_ palpi rufous ; small cross-vein on the middle of the discal cell.

Length 9-10°5 millim.

Allied to the preceding species (E. maura), and perhaps the other sex of it, but differing in the scutellum being

testaceous and in the small cross-vein being oblique and resting on the middle of the discal cell. Front

much narrowed behind; frontal band black, elongate-trigonal, broader than the lateral portions, which are

cinereous ; frontal bristles short, on both sides descending in a single row to the end of the second antennal

joint; face and cheeks whitish; eyes densely clothed with yellowish pile ; beard white; pilosity of the

occiput grey. Antenne black, shorter than the face ; second joint bristly ; third joint three times as long

as the second; arista thickened to beyond the middle. Proboscis black, the terminal lips sometimes dark

rufous ; palpi exserted, rufous. Thorax black, with some grey tomentum, which before the transverse

suture is more conspicuous and interrupted by five black stripes of nearly equal breadth; scutellum piceous

or testaceous. Abdomen broadly ovate, densely beset with short black hairs; first segment unicolorous

black; second and third segments black, laterally testaceous, with grey reflections on the front

borders ; anal segment black, with more or less greyish reflections; on the first two segments the macro-

cheetee are absent ; on the hind margin of the third segment is a row of macrochete ; on the anal segment

the hairs are longer and mixed with some macrochete. Legs black; middle tibie with some long bristles ;

hind tibie outwardly fringed with bristles; foot-claws and pulvilli elongate and surrounded by black

bristles; the pulvilli yellowish. Tegule yellowish-grey, with a pale yellow margin. Wings greyish-

hyaline ; apical cross-vein concave at the base; posterior cross-vein slightly curved.

Hab. Mexico, Amula 6000 feet, Sierra de las Aguas Escondidas 7000 feet, Omilteme

8000 feet, all in Guerrero (H. H. Smith).

Four male specimens.

25. Exorista tenuipalpis, sp.n., ¢.

Blackish ; head and thorax cinereous; the thorax with black stripes; scutellum and sides of the abdomen

testaceous; abdomen with grey reflections; palpi rufous, filiform.

Length 8 millim.

Front narrowed behind; frontal band black, as broad as the lateral portions, its posterior end bifid; frontal

bristles short and weak, on both sides descending in a single row to the end of the second antennal joint ;

above the vibrissee a row of shorter bristles on the facial ridges, mounting to nearly half of the face ; eyes

densely clothed with whitish pile; beard white. Antenne black, shorter than the face; third joint three or

four times as long as the second ; arista slightly thickened in its proximal half. Proboscis black, the terminal

lips with yellowish hairs; palpi filiform, rufous, infuscated at the base. Thorax black, with a cinereous

tomentum, which is more conspicuous before the transverse suture, where it is interrupted by five black

stripes (of these the median and the two lateral stripes are the broadest *); scutellum testaceous. Abdomen

ovate, blackish, the first and second segments laterally testaceous, the second and following segments with

grey reflecting spots; sometimes the intermediate segments have a black dorsal stripe and on either side

of that stripe two large black spots on the hind margins ; on the hind margin of the third segment is a

row of macrochete ; on the anal segment some shorter macrochete among the long black hairs. Legs

* The disposition of these stripes resembles that of E. interstincta, E. trttata, and £. nigricauda, but the

stripes are less distinct. It is possible that H. tenuipalpis is the other sex of E. interstincta; it agrees

with that species in the testaceous colour of the scutellum. But the latter has, besides its smaller size, a

quite different aspect owing to the more cinereous ground-colour of the thorax and abdomen, on which the

stripes and spots appear more sharply limited, the palpi thicker, and the small cross-vein before the middle of

the discal cell.

BIOL. CENTR.-AMER., Dipt., Vol. II., February 1890. l

74 DIPTERA.

black; middle tibize with some long bristles; hind tibiw outwardly fringed with bristles; foot-claws and

pulvilli elongate, the pulvilli yellowish. Tegule yellowish-white. Wings greyish-hyaline; small cross-

vein oblique, on the middle of the discal cell; apical cross-vein slightly concave near its base; posterior

cross-vein curved.

Hab. Mexico, Venta de Zopilote 2800 feet, and Dos Arroyos 1000 feet, in Guerrero

(H. H. Smith).

Four male specimens.

26. Exorista flavicans, sp. n., s.

Head and abdomen ochraceous; thorax cinereous; four thoracic stripes, antenne, and legs black ; palpi

rufous ; abdomen with brown reflections, and without discal macrochete.

Length 7 millim.

Front, cheeks, and posterior orbits of the eyes ochraceous; face in the middle yellowish-white ; occiput grey ;

front broader than the eyes; frontal band black, narrower than the lateral portions; frontal bristles

descending beneath the second antennal joint ; faceslightly inclined ; bristles above the vibriss# mounting

up nearly half the face; pilosity of the eyes yellowish ; beard white. Antenne as long as the face ;

basal joints short, the second with two short bristles; third joint stout, six times as long as the second ;

arista thickened in its proximal half. Proboscis black; palpi dark rufous. Thorax and scutellum

yellowish-cinereous ; thoracic dorsum with four black stripes; scutellum with black reflections. Abdomen

broadly ovate, with brown reflecting spots, a black hind margin to the second segment, and a black

dorsal stripe ; macrochete rather long, on the hind margins of the second and following segments.

Middle tibiz with some long bristles; hind tibiz outwardly with a row of bristles, two of which (one

below the middle, the other before the tip) are longer than the others; foot-claws and pulvilli elongate,

the pulvilli yellowish. Tegule whitish. Wings greyish-hyaline ; small cross-vein on the middle of the

discal cell ; apical cross-vein nearly straight ; posterior cross-vein slightly curved.

Hab. Mexico, Orizaba (fF. D. G. & H. H. Smith).

A single male specimen.

27. Exorista griseomicans, sp. n., ¢ 2.

Greyish ; scutellum and abdomen of the male more or less testaceous; face with silvery reflections ; frontal

band, four thoracic stripes, hind margins of the abdominal segments, antenna, and legs black; palpi

rufous; no discal macrochete.

Length 10°5 millim.

Of a light grey coloration. Front of the male narrowed behind, of the female as broad as the lateral portions ;

frontal bristles on both sides in a single row, some of them descending beneath the root of the antenne ;

vibriss surmounted by some shorter bristles; beard white; pilosity of the eyes short. Antenne nearly

reaching the oral margin ; second joint bristly ; third joint four or five times as long as the second ; arista

thickened for less than its proximal half. Proboscis black, sometimes with yellowish terminal lips ; palpi

pale rufous. Thoracic dorsum with four broad black stripes, which are more or less united two and two

behind the transverse suture ; scutellum usually testaceous. Abdomen ovate ; the first segment, the poste-

rior margin of the second and third segments, and the anus black ; the remainder of the surface with dark

brown, in the male somewhat testaceous, reflections ; on the hind margins of the first and second segments

are two dorsal macrochete and a single one on each side; on the hind margin of the third segment a row

of about seven macrochete, and there are also several round the anus. Legs with scattered bristles; hind

tibia outwardly with short bristles, between which, helow the middle, is a longer bristle; foot-claws

and pulvilli elongate in the male, the pulvilli yellowish. Tegule greyish-white. Wings greyish ; small

eross-vein before the middle of the discal cell; fourth vein with a rectangular curvation ; apical crosgs-

vein slightly concave; posterior cross-vein a little curved.

EXORISTA.—PHOROCERA. 75

Hab. Mexico, Amula 6000 feet and Xucumanatlan 7000 feet, in Guerrero, Teapa

in Tabasco (H. H. Smith); Costa Rica, Cache (Rogers).

Several specimens of both sexes.

Two species of the genus Exorista have been characterized by M. Bigot :—

Exorista rufipalpis, Bigot, Ann. Soc. Ent. Fr. 1888, p. 256. 15.—Mexico.

—— rufata, Bigot, 1. c. p. 257. 16.—Mexico and Brazil.

The following species of Eurigaster and Lydella, described by Walker, may belong

to the genus Frorista in the sense of Schiner. Lydella, Macq., and also the species of

Eurigaster, at least those having hairy eyes, are united by Schiner to his genus Exorista.

According to Osten Sacken (Catalogue of the Diptera of N. America, p. 256, note 272 a),

the genus Eurigaster must be taken as it is adopted by Nowicki (Beitr. zur Kenntniss

der Dipterenfauna Neu-Seelands, p. 28); but, if so, I cannot find any essential distin-

guishing character between Eurigaster and Exorista. Therefore I believe I am correct

in referring the species described by Walker to the genus Exorista; 1 must remark,

however, that Walker has neglected to mention in his descriptions whether his species

have the eyes hairy or not. The species are all from Mexico.

Exorista saginata, Walk. Trans. Ent. Soc. Lond. new ser. v. p. 298 (Hurigaster).

desita, Walk, 1.c. p. 299 (Eurigaster).

commetans, Walk. |.c. p. 299 (Hurigaster).

fertoria, Walk. 1. c. p. 300 (Eurigaster).

— postica, Walk. l.c. p. 301 (£urigaster).

habilis, Walk. 1. c. p. 301 (Hurigaster).

cessatriz, Walk. 1. c. p. 305 (Lydella).

indita, Walk. 1.c. p. 306 (Lydella *).

PHOROCERA.

Phorocera, Robineau-Desvoidy, Essai sur les Myodaires, p. 181 (1830).

This genus is closely allied to the preceding, but differs from it in having a row of

bristles ascending at least half the length of the face, this row being absent, or only

represented by some short bristles above the vibrisse, in Exorista.

In the Central-American collections before me I find the following species :—

DIPTERA.

1. Second and third abdominal segments with discal and marginal

macrochete . a 2)

Second and third abdominal segments only with marginal

macrochete . soe ee . 12.

2. Tegule and base of the wings brown . 3.

Tegule whitish ; wings not infuscated at the base . 5.

3. Arista thickened to beyond the proximal half; middle tibice

outwardly with from two to four long bristles tenebricosa, v. d. Wulp.

Arista thickened for less than the proximal half; middle tibiee

outwardly and inwardly with a single long bristle . 4.

4. Hind tibiz outwardly fringe-like with bristles . nigrita, v. d. Wulp.

Hind tibize outwardly with bristles of unequal length carbonaria, v. d. Wulp.

5. Thorax unicolorous black, without stripes 6.

Thorax cinereous or greyish, with more or less conspicuous

black stripes . 2. 1. 1 2 ee we 7.

6. Front and face laterally fulvous parvula, v. d. Wulp.

Front and face black, opaque woe ee ew ee triceps, v. d. Wulp.

7. Abdomen elongate-conical ; first segment (seen from above) as |

long as the second ; (proboscis rufous) rufilabris, v. d. Wulp.

Abdomen ovate; first segment (seen from above) shorter than

the second . . oe 8.

8. Palpi black; anal segment ochraceous . wo xanthura, v. d. Wulp.

Palpi rufous; anal segment black, with more or less extended

white or grey portions . . 9.

9. The frontal bristles accompanied externally bys some ve weak black

hairs - . . 10.

The frontal bristles unaccompanied by hairs externally . . 1.

10. Eyes not descending to the vibrissz fulviceps, v. d. Wulp.

Eyes descending to the vibrissz . nigrifrons, v. d. Wulp.

11. Abdomen grey, with the hind borders of the segments black . cimerea, v. d. Wulp.

Abdomen black, with whitish tomentum on the second and

third segments coke cylindrata, v. d. Wulp.

12. Abdomen shining black, nearly unicolorous_ immaculata, v. d. Wulp.

Abdomen with grey or whitish portions . 13.

18. Anal segment ochraceous flavicauda, v. d. Wulp.

Anal segment grey or black . 14,

14. Palpi black muscaria, v. d. Wulp.

Palpi rufous . . soe : wee . 15.

15. Third vein with a row of short bristles reaching to near ‘the

small cross-vein . . se ee ee ee . 16.

Third vein without bristles or only some bristles at the base . 17.

16. Wings with a dilute brownish tint along the veins; third vein

slightly curved before its end -

Wings without any brownish tint; third vein nearly straight .

sobrina, v. d. Wulp.

setigera, v. d. Wulp.

PHOROCERA. 77

17. Abdomen shining black, the second and third segments with

white front borders. . . . 0. 0. + ee ee + + + omacra, v. d. Wulp.

Abdomen cinereous, with blackish reflecting spots or black

hind borders to the segments . . . ..-.-. +--+ 1.

18. Fourth vein prolonged behind the curvation . . . +. + - appendiculata, v. d. Wulp.

Fourth vein not prolonged behind the curvation . . . . - 19

19. Scutellum testaceous; abdomen conical. . . . . . + + scutellaris, v. d. Wulp.

Scutellum greyish; abdomen ovate . . . - »- + + + > linearis, v.d. Wulp.

1. Phorocera tenebricosa, sp. n., 3 2.

Black; face and cheeks whitish ; thoracic dorsum anteriorly greyish with black lines; abdomen with discal

and marginal macrochete ; tegule and base of the wings brown; palpi rufous.

Length 8°5-11 millim.

Face and cheeks white, with a cinereous reflection; the cheeks broad and with several weak hairs beneath

the frontal bristles; beard whitish ; front broader than the eyes in both sexes, blackish-grey ; frontal

band brown; frontal bristles on each side in a double row. Antenna black; third joint four times as

long as the second; arista thickened to beyond the middle, and its penultimate joint somewhat distinct.

Palpi rufous, at least at the tip. Thoracic dorsum before the transverse suture with some grey tomentum

and four black lines, of which the median two are the most conspicuous ; scutellum piceous. Abdomen

ovate, convex, unicolorous black, densely haired and with discal and marginal macrochete. Legs black ;

front femora with a row of bristles on the upperside and another on the underside; posterior femora

with long bristles on the underside; front tibie outwardly with short bristles ; middle tibia outwardly

with three or four and inwardly with two long bristles ; hind tibia outwardly fringed, and with a longer

bristle below the middle; foot-claws and pulvilli elongate in the male, the pulvilli yellow. Tegule and

base of the wings dark brown, the rest of the wings greyish ; small cross-vein before the middle of the

discal cell; apical cross-vein concave at the base; posterior cross-vein curved.

Hab. Mexico, Amula 6000 feet, Omilteme 8000 feet, and Sierra de las Aguas

Escondidas 9500 feet, all in Guerrero (H. H. Smith), Tuxpango (coll. Bellardi).

‘Two male and two female specimens were collected by Mr. Smith; both sexes are

also represented in the collection of Prof. Bellardi.

9. Phorocera nigrita, sp.n. 2. (Tab. IIT. fig. 11.)

Black ; face and abdomen with whitish reflections; the abdominal segments with discal and marginal macro-

chaste ; tegule and base of the wings brown ; palpi black.

Length 8-5-9°5 millim.

Deep black, except a white reflection on the face and whitish reflecting spots on the abdomen, which are only

perceptible in certain lights. Front above the antenne as broad as the diameter of the eyes, narrower

behind ; frontal bristles descending in a single row to the number of three or four beneath the root of

the antennw; face perpendicular; oral margin not prominent ; the bristles of the facial ridges reaching to

the end of the frontal bristles; beard black. Eyes with a dense yellowish pile. Antenne black,

shorter than the face ; second joint somewhat porrected and very bristly ; third joint three or four times

as long as the second; arista thickened in its proximal third. Palpi black. Thorax black, opaque,

without any markings; scutellum faintly shining, stained with brownish, especially on the hind

margin. Abdomen ovate; the whitish spots appear usually on the second and third segments ; in some

specimens the second segment shows laterally a reddish tint ; discal and marginal macrochete are present,

put not very conspicuous, owing to the long and dense pile which covers the abdomen. Legs black; the

bristles as in the preceding species, except that the middle tibia have but two long and stout bristles, one

on the outside, the other, somewhat lower down, on the inner side ; foot-claws and pulvilli short, the pulvilli

yellowish. Tegule and base of the wings brown, the rest of the wings greyish ; small cross-vein before

78 DIPTERA.

the middle of the discal cell; curvation of the fourth vein with a blunt angle; apical cross-vein nearly

straight ; posterior cross-vein distinctly curved, inserted beyond two-thirds of the apical cell.

Hab. Costa Rica, Volcan de Irazu 6500 to 7000 feet (Rogers).

Four female specimens.

Phorocera nigrita differs from P. tenebricosa in its somewhat smaller size and in the

arista being thickened only at the base; also in the black palpi, the unicolorous black

thorax, and the whitish reflecting spots on the abdomen.

3. Phorocera carbonaria, sp. n., 2.

Black ; thoracic dorsum anteriorly with grey tomentum and four black lines; abdomen with white reflections

on the front borders of the segments, and with discal and marginal macrochete.

Length 6°5 millim.

Front broader than the eyes, blackish; frontal band black, as broad as the lateral portions; frontal bristles on each

side ina double row and descending to the end of the second antennal joint ; cheeks blackish, with a white

reflection and a trigonal rufous spot beneath the eyes. Antenne black; second joint bristly ; third joint

four times as long as the second ; arista thickened in its proximal third. Proboscis and palpi black; the

terminal lips of the proboscis and the tip of the palpi dark rufous. Thorax before the transverse suture

with some grey tomentum and four black lines; scutellum black. Abdomen ovate, convex, shining

black, with narrow white front borders to the second and third segments and whitish reflections at

the sides ; macrochete long, and more conspicuous than in P. nigrita, owing to the pilosity of the

abdomen being shorter. Legs black; the bristles very much as in P. nigrita, but those of the hind

tibie less fringe-like and of more unequal length. Tegule brownish. Wings brownish-grey, more

intensely so at the base and along the costa; small cross-vein before the middle of the discal cell;

curvation of the fourth vein with a blunt angle; apical cross-vein straight ; posterior cross-vein slightly

curved.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single female specimen.

4. Phorocera parvula, sp. n., 2.

Shining black, pilose; face and sides of the front fulvous; the second and following abdominal segments

with the anterior margin whitish ; discal and marginal macrochete present; apical cell narrowly opened.

Length 4°5 millim.

This species is distinguished by its small size, black colour, and dense pilosity. Face blackish, laterally dark

fulvous; the sides of the front of the same colour ; the front itself is a little prominent and proportionally

narrow, being on the vertex less broad than the diameter of the eyes; frontal band black, narrow ;

frontal bristles descending beneath the root of the antenne and beneath the point where the facial bristles

finish. Eyes densely beset with a somewhat brownish pile. Antenne a little shorter than the face;

second joint with several short bristles; third joint four times as long as the second; arista thickened for

nearly half its length. Palpi black. Thorax and scutellum black, without any light tomentum or

stripes. Abdomen elongate-ovate, shining black; second segment with a narrow whitish front margin,

which is interrupted in the middle; third and fourth segments with a similar though broader margin,

which sometimes forms white spots. The thorax and abdomen have a rather long black pilosity. Legs

black ; the underside of the femora with many bristles ; the bristles of the middle tibia are not longer than

the others; on the outside of the hind tibie is a row of bristles and a longer bristle a little below the

middle; foot-claws and pulvilli short. Tegule large, whitish. Wings hyaline; apical cell narrowly

opened at a short distance from the wing’s tip; small cross-vein a little before the middle of the discal

cell; apical cross-vein straight ; posterior cross-vein slightly curved.

- Hab. Mexico, Orizaba (H. H. Sinith & F. D. G.).

A single female specimen.

PHOROCERA. | 79

5. Phorocera atriceps, sp. n., ¢ (2%).

Black, opaque; second and following abdominal segments with cinereous and white reflections and a black

dorsal stripe; tegule whitish; wings hyaline.

Length 5:5 millim.

Allied to the preceding species, but differing in the velvety-black colour of the face and sides of the front ;

frontal band cinereous, sometimes inconspicuous ; frontal bristles descending to where the facial bristles

finish. Pilosity of the eyes very conspicuous, yellowish on the upper part, darker below. Antenne as

in P. parvula ; palpi brownish. Thorax and scutellum black, without any light tomentum. Abdomen

elongate-ovate ; first segment black, the following segments cinereous, with a black dorsal stripe and

white reflecting spots on the front borders and black hind margins; the second and third segments have

laterally some reddish tint; beneath the anus in one of the specimens there are two small appendages,

which are thickened at the base and recurved towards the venter; discal and marginal macrochete are

present. Legs black; underside of the femora with many bristles ; on the outside of the middle tibiae a

long bristle ; on that of the hind tibiz a row of bristles and a longer bristle below the middle ; foot-claws

and pulvilli short (though the specimens are males). Tegule greyish-white. Wings byaline ; neuration

as in P. parvula.

Hab. Mexico, Orizaba (H. H. Smith & F. D. G.), Venta de Zopilote 2800 feet and

Amula 6000 feet, both in Guerrero (H. H. Smith). |

Four male specimens (in one of them the abdomen is missing).

Two examples from Teapa, Tabasco (H. H. Smith), are probably the female of the

same species; they are a little larger (6 millim.), and agree in the coloration and shape

of the body &c. with the males from Guerrero and Orizaba; the front is scarcely

broader, but more of equal breadth ; on the thoracic dorsum, however, there is a cine-

reous tomentum, in which four black stripes are visible. A similar female specimen,

from Mexico, is contained in the collection of Prof. Bellardi.

6. Phorocera rufilabris, sp.n., ¢ ¢.

Thorax cinereous, with black stripes; head whitish ; abdomen conical, black, with white reflections and with

discal and marginal macrochetez ; antennez and legs black ; proboscis and palpi rufous.

Length 10 millim.

Front of the male slightly prominent, narrower than the eyes, that of the female as broad as the eyes; frontal

band black; frontal bristles on both sides in a single row, descending to the end of the second antennal

joint; sides of the front, face, and cheeks white with grey reflections, the face somewhat inclined ; bristles

of the facial ridges extending to some distance beneath the frontal bristles. Antenne black, in the male

nearly as long as the face, in the female shorter; second joint short and bristly; third joint four (@ ) or

six (¢ ) times as long as the second; arista thickened only at the base. Proboscis and palpi yellowish-

rufous. Thoracic dorsum before the transverse suture with four black stripes, the intermediate stripes

linear and disappearing behind the suture in a more general black coloration, which, however, does not

reach either the hind margin or the sides of the thorax; scutellum black, with some grey tomentum.

Abdomen conical, shining black, with whitish reflections on the front borders of the second and following

segments ; first segment wholly black, as long as the second; on the second and third segments discal

and marginal macrochwte are present, the discal macrochetz longer than the marginal; anal segment

truncate, densely beset with black hairs and macrochate. Legs rather slender and long ; intermediate

tibiee with one or two long bristles at the middle; hind tibiee outwardly with bristles of unequal length ;

foot-claws and pulvilli elongate in the male, the pulvilli yellowish. Tegule whitish. Wings greyish-

hyaline ; small cross-vein under the end of the first vein and before the middle of the discal cell ; apical

and posterior cross-veins oblique, the apical nearly straight, the posterior slightly curved.

80 DIPTERA.

Hab. Mexico, Omilteme 8000 feet and Sierra de las Aguas Escondidas 9500 feet,

both in Guerrero (H. H. Smith).

A male specimen from the latter, a female from the former locality.

Owing to the elongate and slender shape of the body and legs, this species has an

aspect differing from that of most of its congeners.

7. Phorocera xanthura, sp. n., ¢.

Cinereous ; head and anal segment ochraceous; frontal band, four distinct thoracic stripes, reflections on the

abdomen, antenne, and palpi black.

Length 9 millim.

‘Head ochraceous; front broader than the eyes; frontal band black, sharply limited, narrower than the lateral

portions; frontal bristles descending beneath the end of the second antennal joint ; facial bristles stout, but

not numerous, mounting to where the frontal bristles finish. Antenne shorter than the face ; second joint

short, bristly ; third joint four or five times as long as the second ; arista thickened in its proximal half.

Proboscis and palpi black, the terminal lips of the former somewhat rufous. Thorax cinereous, with four

distinct, equally broad, black stripes, which are united two and two behind the transverse suture ; scutellum

cinereous, blackish at the base. Abdomen ovate, convex; first segment black, the following segments

cinereous with blackish or brown reflecting spots and sometimes a black dorsal stripe; anal segment

bright ochraceous ; second segment with marginal, third and anal segments with discal and marginal,

macrochete#. Middle tibiz with some long bristles; hind tibize outwardly with nearly fringe-like bristles

mixed with some longer ones. Tegule whitish. Wings greyish-hyaline; small cross-vein on the middle

of the discal cell; apical cross-vein concave ; posterior cross-vein nearly straight.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

A single female specimen.

8. Phorocera fulviceps, sp. n.,¢ 2.

Blackish, with cinereous tomentum ; thoracic dorsum with four black stripes; abdomen with black reflecting

spots, and with discal and marginal macrochete ; palpi rufous.

Length 6—9°5 millim.

Front in the male narrowed behind, and scarcely as broad as the eyes, in the female broader; frontal band

black; frontal bristles descending on both sides in a curved row to the number of four or five beneath

the root of the antenne; external to the frontal bristles are some weak hairs; facial bristles reaching to

the point where the frontal bristles finish. Eyes not descending beneath the vibrisse, densely beset with

yellowish pile. Antenne shorter than the face; second joint bristly; third joint narrow, truncate at the

tip, four times as long as the second ; arista thickened on its proximal third. Proboscis dark brown, the

terminal lips with yellow hairs; palpi rufous. On the shoulders the cinereous tomentum has sometimes

a yellowish tint ; the black stripes on the thoracic dorsum are very distinct in the more greyish specimens ;

the scutellum, if not covered by the tomentum, appears somewhat testaceous, and usually has a blackish

base. The black reflecting spots of the abdomen are for the greater part on the hind margins of the

segments; in the more obscure specimens the abdomen is black with greyish or whitish reflections; the

anal segment is always black in the middle and on the anus. Legs black; middle tibia outwardly with

a long bristle ; hind tibiee outwardly with a row of short bristles, and a longer median bristle; foot-claws

and pulvilli elongate in the male, the pulvilli yellowish. Tegule whitish. Wings greyish-hyaline; small

cross-vein under the middle of the mediastinal cell and before the middle of the discal cell ; apical cross-

vein nearly straight; posterior cross-vein curved.

Hab. Mexico (coll. Bellardi), Xucumanatlan 7000 feet, Omilteme 8000 feet, and

Sierra de las Aguas Escondidas 9500 feet, all in Guerrero (H. H. Smith), Orizaba

(H. H. Smith & F. D. G.).

PHOROCERA. 81

_ Several examples of both sexes. A female specimen, from Mexico, is also contained

in the collection of Prof. Bellardi.

This species has the general facies of the preceding, but differs in the rufous palpi

and in the anal segment being blackish in the middle and only laterally cinereous or

yellowish. It varies in its coloration: in the darkest specimens the black colour

prevails, in others the cinereous tomentum is more extended; the head is sometimes

more or less fulvous (hence the name), but the median part of the face is usually

whitish.

9. Phorocera nigrifrons, sp. n., 2.

Black; face, cheeks, and reflections on the thorax and on the abdomen whitish; scutellum testaceous ; palpi

rufous,

Length 5°5 millim.

Front slightly prominent, as broad as the eyes, blackish, anteriorly whitish; frontal band black; frontal

bristles descending to the end of the second antennal joint; external to the frontal bristles are some

weak hairs; face and cheeks whitish; facial bristles mounting to where the frontal bristles finish. Eyes

descending to the vibrisse, clothed with yellowish pile. Antenne black, a little shorter than the face;

second joint short, bristly ; third joint four times as long as the second; arista thickened on its proximal

third. Proboscis black; palpi exserted, cylindrical, palerufous. Thorax shining black ; the white reflec-

tions form laterally a band from the shoulders to the root of the wings, and occupy the portion before the

transverse suture, but interrupted there by four black stripes; scutellum testaceous. Abdomen ovate,

convex, shining black, with white reflecting spots laterally on the second and following segments, and

with long discal and marginal macrochete. Legs black; middle tibis with some long bristles; hind

tibia outwardly with bristles of unequal length. Tegule white. Wings brownish-grey, more obscure on

the base and along the costa; small cross-vein a little before the middle of the discal cell; apical cross-

vein concave near the base; posterior cross-vein slightly curved.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single female specimen.

10. Phorocera cinerea, sp. n., 2.

Cinereous; four stripes on the thorax, hind borders of the abdominal segments, ventral face, third antennal

joint, and legs black; palpi and basal joints of the antenne rufous ; hind tibie with long bristles.

Length 9 millim. ,

Front yellowish-cinereous, broader than the eyes ; frontal band brown, narrower than the lateral portions ; frontal

bristles stout, descending in a curved row to beneath the second antennal joint, the lowest of these bristles

close to the eyes. Face and cheeks white, the cheeks broad; eyes not descending to the vibrisse ; the

pilosity of the eyes only conspicuous when viewed under the lens; facial bristles not fully reaching the

frontal ones; beard white. Antenne shorter than the face; basal joint short, somewhat rufous; third

joint brownish-black, four times as long as the second; arista thickened to beyond the middle. Proboscis

black ; palpi cylindrical, rufous, with black hairs near the tip. Thorax cinereous, with four black stripes

(the median stripes linear), which behind the transverse suture disappear in a more general blackish

coloration ; black reflections are also on the pleure; scutellum cinereous, flattened. Abdomen ovate;

first segment black, the following segments with black hind borders; on the second and third segments

are traces of a black dorsal stripe; besides the marginal macrochete, there are two discal ones on the

third segment ; anal segment densely beset with black hairs and macrochete. Middle tibie with some

long bristles; hind tibie with bristles of unequal length, some of them nearly as long as those of the

middle tibie. Tegule white. Wings hyaline; small cross-vein on or just before the middle of the

BIOL. CENTR.-AMER., Dipt., Vol. II., February 1890. m

82 DIPTERA.

discal cell; curvation of the fourth vein with an acute angle, and a fold on the wing’s surface, simulating

a continuation of the vein; apical cross-vein slightly concave at the base; posterior cross-vein curved

inwards.

Hab. Muxico, Rincon in Guerrero 2800 feet (H. H. Smith).

A single female specimen.

11. Phorocera cylindrata, sp. n.,¢.

Shining black; head white; thorax partly whitish, with obsolete black stripes; abdomen cylindrical, the

second and third segments with whitish front borders.

Length 5:5 millim.

Head white, somewhat silvery, the cheeks with a rufous reflection; front scarcely narrowed behind, nearly as

broad as the eyes; frontal band black; frontal bristles on both sides in a single row, and not descending

beneath the root of the antenne; pilosity of the eyes and beard whitish. Antenne black, shorter than

the face; second joint bristly; third joint four times as long as the second ; arista thickened at the base.

Proboscis and palpi (so far as they are visible in the unique specimen) rufous. Thorax, scutellum, and

abdomen shining black; thorax laterally and anteriorly with whitish tomentum ; four black stripes appear,

in certain lights, before the transverse suture. Abdomen nearly cylindrical; second and third segments

with a whitish tomentum, which is most distinct on the front borders; on the anal segment is a similar

tomentum, but only at the sides; discal and marginal macrochaxte are present. Legs black ; middle tibiz

with some long bristles; hind tibie outwardly with bristles of unequal length; foot-claws and pulvilli

elongate, the pulvilli yellowish. Tegule whitish. Wings greyish ; small cross-vein under the end of the

first vein and on the middle of the discal cell; curvation of the fourth vein with a blunt angle; apical

and posterior cross-veins oblique, the apical straight, the posterior slightly curved.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (7. H. Smith).

A single male specimen. .

This species is easily recognizable from others of the genus by its small size and

cylindrical form.

12. Phorocera immaculata, sp.n.,¢ 2.

Thorax cinereous, with four stripes; head whitish; abdomen, antenne, and legs black ; palpi rufous; no discal

macrocheetee on the abdominal segments.

Length 9-12°5 millim.

Front slightly prominent, yellowish-cinereous, in the male as broad as, in the female a little broader than, the

eyes ; frontal band blackish, narrower than the lateral portions ; frontal bristles robust, on both sides in

a curved row, distinctly descending beneath the second antennal joint, the lowest bristle close to the eyes ;

face and cheeks white, in the male somewhat silvery; eyes not quite reaching the vibrissw, densely

clothed with yellowish pile; pilosity of the occiput greyish; on the vertex are some long black bristly

hairs. Antenne a little shorter than the face; second joint bristly; third joint four or five times as

long as the second; arista thickened in its proximal half. Proboscis black or dark brown; palpi rufous,

blackish at the base. Thorax and scutellum cinereous; thoracic dorsum with four black stripes, which,

behind the transverse suture, become diffuse and disappear in a more general blackish coloration.

Abdomen elongate-oval, black, somewhat shining; the second and third segments have an almost

inconspicuous, narrow, whitish front border; macrochete are on the hind margins of these segments,

and in greater number on the anal segment. Legs rather slender; middle tibie with several long

bristles ; hind tibiae with shorter and longer bristles; foot-claws and pulvilli elongate in the male, the

pulvilli yellowish. Tegule whitish. Wings greyish-hyaline; small cross-vein under the middle of the

mediastinal cell and before the middle of the discal cell; apical cross-vein concave at the base ; posterior

cross-vein distinctly curved.

PHOROCERA. 83

Hab. Mexico, Amula 6000 feet and Omilteme 8000 feet, both in Gruerrero (H. Hl.

Smith).

Three male and two female specimens.

13. Phorocera flavicauda, sp. n., 2.

Cinereous; four stripes on the thorax, reflecting spots on the abdomen, antenne, and legs black; anal segment

ochraceous ; palpi rufous; no discal macrochete.

Length 8-5 millim.

Ground-colour of the head differing in the two specimens before me—in one it is rather bright ochraceous, in

the other pale yellow. Front broader than the eyes; frontal band dark brown, narrower than the lateral

portions, the latter partly infuscated; frontal bristles on both sides in a curved row, distinctly descending

beneath the second antennal joint; cheeks broad, partly with brownish or blackish reflections, beneath

the eyes with a deep groove; vibrisse not quite at the oral margin, but a little above it; beard and pilosity

of the occiput whitish; eyes with a short yellowish pile. Antenne shorter than the face; second joint

bristly ; third joint four or five times as long as the second; arista thickened in its proximal half, the

penultimate joint somewhat distinct. Proboscis black ; palpi pale rufous, slightly thickened towards the

tip. Thorax greyish-cinereous, with four distinct black stripes, which are more or less interrupted at

the transverse suture; scutellum grey, slightly stained with testaceous on the disc. Abdomen ovate,

cinereous, with irregular blackish reflecting spots; the anal segment ochraceous; macrochaxte on the hind

margins of the first three segments and several on the anal segment. Legs black, the tibize piceous ;

middle tibixs with some long bristles; hind tibie: with several longer and shorter bristles. Tegule white.

Wings greyish; small cross-vein on the middle of the discal cell; apical and posterior cross-veins very

slightly curved.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H.H. Smith), Mexico city (Schumann).

A female specimen from each locality. P.flavicauda much resembles P. canthura,

but differs from it in the rufous palpi and by the absence of discal macrochete.

14. Phorocera muscaria, sp. n., 3.

Cinereous; frontal band, antenna, palpi, four thoracic stripes, hind borders of the abdominal segments, and

legs black; no discal macrochete.

Length 7 millim.

Front a little prominent, as broad as the diameter of the eyes, yellowish-cinereous ; frontal band narrower than

the lateral portions, black, with a greyish reflection ; frontal bristles descending on both sides as far as the

end of the second antennal joint, the bristles of the facial ridges robust, and reaching to where the frontal

bristles finish. Eyes thinly pilose. Antenne nearly as long as the face; second joint bristly ; third joint

about five times as long as the second; arista thickened in its proximal third. The thoracic stripes

distinctly prolonged behind the transverse suture; scutellum with a large black .basal spot. Abdomen

broadly ovate; first segment black, the following segments cinereous, with blackish reflecting spots and

black hind borders; ventral face black; macrocheete only at the hind margins of'the segments. Femora

with rather long bristles on the underside; front tibia outwardly with some short bristles; three longer

bristles on the middle tibia—one outwardly, one inwardly, and one posteriorly; hind tibize outwardly

with a row of bristles of unequal length; foot-claws and pulvilli elongate, the pulvilli brownish with pale

margins. Tegule whitish. Wings greyish-hyaline; costa somewhat convex; small cross-vein distinctly

before the middle of the discal cell; apical cross-vein nearly straight; posterior cross-vein slightly

curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single male specimen.

84 DIPTERA.

15. Phorocera sobrina, sp. n., ¢.

Cinereous; hind margins of the abdominal segments, antenne, and legs black; palpi and terminal lips of the

proboscis rufous; no discal macrochete; veins of the wings bordered with a brownish-yellow tint ; third

vein with bristles.

Length 8 millim.

Head white, with grey reflections; front as broad as the eyes; frontal band dark brown; frontal bristles

stout, descending to beyond the end of the second antennal joint; facial bristles mounting to where the

frontal bristles finish; beard whitish; pilosity of the occiput greyish. Eyes with a short grey pile.

Antenne black; second joint bristly; third joint five or six times as long as the second, and reaching to

the oral margin; arista thickened for nearly half its length. Proboscis, at least its terminal lips, pale

rufous; palpi of the same colour. Thorax cinereous, with two or four black lines, these sometimes

disappearing in a more general obscure coloration, in which some grey stripes become visible; scutellum

cinereous. Abdomen conical; first segment black, shorter than the following ones, which are black with

grey reflections on the front borders; macrochete are on the hind margins of the segments; the ventral

side is carinated. Front tibiee with short, the middle and hind tibie with longer bristles. Tegule whitish.

Wings greyish-hyaline, with a brownish tint on the costa and along the veins; the third vein is slightly

curved before its end and has a row of short bristles extending from the base to the small cross-vein ;

this cross-vein rests on the middle of the discal cell; the curvation of the fourth vein forms nearly a

rectangle; apical cross-vein slightly concave before its end; posterior cross-vein oblique, slightly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

This insect partly agrees with Macquart’s description of Phorocera tenuiseta, from

Cayenne (Dipt. exot., Suppl. i. p. 186. no. 4); the latter is, however, of somewhat larger

size and seems to have a more slender shape, the first abdominal segment being

elongate.

16. Phorocera setigera, sp.n., 3 9.

Cinereous ; frontal band, stripes on the thorax, antenne, and legs black; abdomen black, with greyish front

borders to the segments; no discal macrochete; palpi rufous; wings greyish ; third vein with bristles.

Length 9°5 millim.

Closely allied to the preceding species (P. sobrina), but of a larger size. The wings have not a brownish or

yellowish tint, except at their extreme base; the third vein is also bristly from its base to the small cross-

vein, but it is not curved before its end; the terminal lips of the proboscis are dark rufous, in the male

more obscure than in the female; the stripes on the thorax are more conspicuous—sometimes two median

lines and two other broader stripes appear, and in other directions five rather broad stripes are visible.

In the male the foot-claws and pulvilli are elongate.

Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (1. H. Smith).

Two specimens, one of each sex.

17. Phorocera macra, sp. n. (@ 2).

Shining black; head and thorax whitish-grey ; frontal band, antenne, four thoracic stripes, and legs black ;

second and third abdominal segments with white front borders; no discal macrochxte; palpi rufous;

hind tibize with long bristles.

Length 6 millim.

Of a slender form. Head white, with grey reflections; front not narrowed behind, nearly as broad as the

eyes; frontal band black, sometimes with a brown tint; frontal bristles on both sides descending a little

beneath the first antennal joint; facial bristles mounting to beyond half of the face; beard whitish.

PHOROCERA. 85

Eyes with a short grey pile. Antenne a little shorter than the face; second joint bristly; third joint

four or five times as long as the second; arista thickened in its proximal third. Proboscis black; palpi

pale rufous, filiform. Thorax whitish-grey, before the transverse suture with four black lines, these,

however, not always visible in the blackish reflections, which sometimes cover the whole thoracic dorsum ;

scutellum black, with grey tomentum. Abdomen elliptical, shining black; first segment as long as the

second; second and third segments with whitish reflecting spots on the front borders; macrochwts on

the hind margins but not in the middle of the segments. Femora with long bristles; tibia outwardly

with some bristles—on the front tibie they are rather short, on the middle and hind tibie longer ; foot-

claws and pulvilli short. Tegule white. Wings rather broad, greyish-hyaline; small cross-vein a little

before the middle of the discal cell; third vein somewhat curved before its end; apical cross-vein scarcely

concave; posterior cross-vein slightly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

Three specimens, apparently all females.

18. Phorocera appendiculata, sp. n., ¢.

Greyish-cinereous; four stripes on the thorax, hind borders of the abdominal segments, antenne, and legs

black ; palpi rufous; curvation of the fourth vein with an appendage.

Length 7-8°5 millim.

Head white; front nearly as broad as the eyes; frontal band black; frontal bristles on both sides in a single

row, descending to beneath the end of the second antennal joint; facial bristles mounting to a little

beyond the place where the frontal bristles finish; eyes descending to the vibrisse and with a short

whitish pile; beard white. Antenne shorter than the face, black; the basal joints somewhat clearer ;

second joint bristly; third joint four times as long as the second; arista thickened in its proximal half.

Proboscis black; palpi cylindrical, nearly filiform, pale rufous. The four stripes of the thoracic dorsum

are distinct, but interrupted at the transverse suture; base of the scutellum blackish. Abdomen ovate,

beset with black hairs, more densely so on the anal segment and the ventral face, where the hairs are

longer ; first segment black, the following segments greyish, with black hind borders; the second segment

at the sides slightly testaceous; macrochete on the hind margins of the segments; on the anus there is

a spine, which is turned under the venter. Middle tibiee with some long bristles ; hind tibie outwardly

with bristles of unequal length; foot-claws and pulvilli elongate, the pulvilli yellowish. Tegule white.

Wings greyish-hyaline; small cross-vein on the middle of the discal cell; curvation of the fourth vein

with a blunt angle and a more or less distinct appendage; apical and posterior cross-veins oblique and

nearly straight.

Hab. Mexico, Rincon 2800 feet, and Amula 6000 feet, both in Guerrero (H. H.

Smith).

A male specimen from each locality.

19. Phorocera scutellaris, sp. n., 3.

Cinereous; thorax with four black stripes; scutellum testaceous ; abdomen conical, second and third segments

with three black spots; antenne and legs black; palpi rufous.

Length 10 millim.

Front pale ochraceous, narrowed behind; frontal band black, as broad as the lateral portions ; frontal bristles on

each side in a curved row, distinctly descending beneath the second antennal joint, the median bristles

shorter than the others. Face and cheeks white; eyes descending to the vibrisse and with a short whitish

pile; beard white ; pilosity of the occiput yellowish. Antenne shorter than the face; second joint bristly ;

third joint four times as long as the second; arista thickened in its proximal half. Proboscis blackish ;

palpi cylindrical, pale rufous. Thorax grey; thoracic dorsum with four black stripes, which are very

distinct before the transverse suture, but somewhat diffuse behind it; scutellum shining testaceous,

86 DIPTERA.

blackish at the base. Abdomen conical; first segment black; second and third segments cinereous, with

black hind borders and three oblong black spots, the median spots forming a dorsal stripe which is pro-

longed over the anal segment; ventral face blackish, densely beset with black hairs, especially the anal

segment; macrochetz only at the hind margins of the segments. Middle tibia with some long bristles ;

hind tibia outwardly with bristles of unequal length ; foot-claws and pulvilli very elongate and surrounded

by bristly hairs; the pulvilli greyish-yellow. Tegule whitish. Wings greyish-hyaline; small cross-vein

nearly on the middle of the discal cell; curvation of the fourth vein with a right angle; apical and

posterior cross-veins oblique, the apical concave at the base, the posterior slightly curved.

Hab. Mrxico, Venta de Zopilote 2800 feet, and Amula 6000 feet, both in Guerrero

(1. H. Smith).

Three male specimens.

20. Phorocera linearis, sp. n., ¢.

Cinereous; thorax with black lines; abdominal segments with black hind borders; head whitish ; frontal band

black, linear; antenne and legs black; palpi rufous.

Length 8°5 millim.

Front yellowish, a little broader than the eyes; frontal band black, much narrower than the lateral portions ;

frontal bristles on each side in a curved row, descending to beneath the second antennal joint; face and

cheeks white ; eyes descending to the vibrissee and with a short whitish pile; beard white. Antenne nearly

as long as the face; third joint five times as long as the second; arista scarcely thickened at the base.

Proboscis black; palpi cylindrical, pale rufous. Thorax and scutellum cinereous; thoracic dorsum with

four somewhat irregular black lines. Abdomen ovate; first segment black, the following segments

cinereous with black reflecting spots and black hind borders; second segment at the sides slightly

testaceous ; the anus ends in a stout spine, which is turned under the venter; macrocheete are on the

hind margins of the second and third segments and there are several on the anal segment. Middle

tibia with some long bristles; hind tibiee outwardly with many short bristles and a long one below the

middle; foot-claws and pulvilli elongate and surrounded by bristly hairs; the pulvilli yellowish. Tegule

white. Wings nearly hyaline, the base and costa with a yellowish tint; small cross-vein on the middle

of the discal cell; apical cross-vein concave; posterior cross-vein curved.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

Two male specimens.

21. Phorocera ——?

Hab. Costa Rica, Cache (Rogers).

A single female specimen of a species different from those above mentioned and also

from any described member of the genus.

As the example is somewhat damaged, it is not advisable to name it. I may observe

that it closely resembles Baumhaueria parvipalpis (a species described in a subsequent

page); the general coloration, however, is more grey; the frontal band is blackish; the

eyes are hairy (though less conspicuously so than in most species of Phorocera); the

palpi are more developed than in Baumhaueria parvipalpis; the hind borders of the

abdominal segments are more broadly black; the small cross-vein is just in the middle

of the discal cell; and the posterior cross-vein is distinctly beyond the middle between

the small cross-vein and the curvation of the fourth vein.

PHOROCERA.—TRIXA. 87

‘Mz. Bigot has characterized three species of the genus Phorocera from Mexico; but

I cannot recognize in them any of the species here described.

_ Phorocera barbata, Bigot, Ann. Soc. Ent. Fr. 1888, p. 260. no. 36.—Mexico.

melanoceps, Bigot, loc. cit. no. 37.—Mexico.

parva, Bigot, loc. cit. no. 38.—Mexico.

TRIXA.

Triza, Meigen, Syst. Beschr. europ. Zweifl. Ins. iv. p. 222. no. 147 (1824).

Of this well-defined genus, one species only, 7. wncana (Fabr.), was hitherto known

from America; in the collections sent by Mr. H. H. Smith from Mexico I find two

others, which are described below.

The genus is especially characterized by the head being distinctly prolonged beneath

the eyes; the antenne are very short and rest in a deep groove of the face, nearly in

the same manner as in the CEéstride; above the oral margin there are some bristles,

these mounting on the facial ridges to half the length of the face, and among which

the vibrissee do not show a greater development. The Mexican species agree in their

general facies with the European forms; only the front is more prominent and the

face somewhat inclined ; the palpi are less thickened ; the abdominal segments have

no discal macrochete ; and the wings have a small costal spine. These differences,

however, are not sufficient to justify a generic separation, when all other characters are

present.

The two species may be easily recognized by the following differences :—

Abdomen rufous (¢) or blackish (¢), with grey and white reflecting

spots . . .. . obsoleta, v. d. Wulp.

Abdomen without whitish or grey reflecting spots, rufous with a black

dorsal stripe (¢), or black with some white reflections only on the

analsegment(?). . . . 2... ee e ws ee es s) differens, v. d. Wulp.

1. Trixa obsoleta, sp.n., ¢ 2.

Thorax and scutellum blackish ; abdomen black with whitish reflecting spots, in the male laterally rufous ;

head and basal joints of the antennz rufous; legs black.

Length 8-11 millim.

Front prominent and forming almost a right angle with the face—in the male much narrowed behind,

laterally cinereous, and with a rufous median band; in the femaie broader than the eyes, yellowish-

cinereous, the median band blackish, sometimes inconspicuous. Frontal bristles on both sides in a single

row, in the female less numerous, but more robust. Face and cheeks rufous, with grey or yellowish

reflections, the face with a deep median groove, the cheeks with a trigonal impression under the eyes.

Basal joints of the antenne rufous, the second joint convex ; third joint black, as long as the second ;

arista thickened in its proximal half. Proboscis black ; palpi small, pale rufous, the tip slightly thickened,

black, and beset with black hairs. Thorax and scutellum black, with some greyish or cinereous tomentum,

which in the female is more conspicuous and interrupted on the thoracic dorsum by four black stripes.

Abdomen ovate; first segment black; the following segments black with whitish reflections—in the male

broadly rufous at the sides and somewhat transparent, in the female with the anus only rufous; macro-

DIPTERA.

chete are on the hind margin of the second and third segments and there are several on the anal

segment. Legs black, the posterior tibie piceous; the tarsi in both sexes slender; foot-claws black, the

pulvilli yellowish, both somewhat elongate in the male; bristles of the legs weak, some longer ones on the

outside of the middle tibia. Tegule whitish. Wings grey, with a dilute brownish tint at the base and

along the costa; a small costal spine is present; the cross-veins are thick and more or less infuscated ;

small cross-vein on the middle of the discal cell ; curvation of the fourth vein forming a right angle and

with a short appendage; apical and posterior cross-veins distinctly curved ; apical cell opened a little

before the tip of the wings.

Hab. Mexico, Omilteme 8000 feet, and Sierra de las Aguas Escondidas 9500 feet,

both in Guerrero (H. H. Smith).

Several male and a few female specimens.

2. Trixa differens, sp.n., ¢ 9.

Thorax and scutellum cinereous; abdomen rufous with a black dorsal stripe (3), or black with whitish

reflections on the anal segment (2); antenn# rufous ; legs black ; foot-claws yellow, black at the tip;

wings brownish, rufous at the base.

Length 13 millim.

Shape of the head and arrangement of the frontal and facial bristles as in the preceding species; frontal

band brown, the sides of the front dark cinereous; face and cheeks white, with ochraceous reflections.

Antenne rufous, the third joint brown towards the tip; arista black, thickened to beyond the middle.

Proboscis shining black; palpi small, rufous, with black hairs. Thorax and scutellum yellowish-

cinereous; on the thoracic dorsum four black lines, which are interrupted at the transverse suture.

Abdomen ovate, convex, very different in coloration in the two sexes: in the male it is bright rufous,

with a large black spot on the first segment and a narrow black dorsal stripe on the following segments ;

in the female it is black, with some white reflections on the anal segment, which are most conspicuous at

the sides; macrocheete are on the hind margins of the second and third segments and there are several

on the anal segment, those of the second segment sometimes absent in the male. Legs black, rather long

and slender; foot-claws and pulvilli elongate in the male, yellow, the claws black at the tip; bristles of

the legs weak, Tegule dark grey, with a narrow yellow margin. Wings brownish, more intensely so in

the subcostal cell and along the veins ; the base and costa, including the mediastinal cell, pale rufous ;

neuration as in 7’. obsoleta.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

Two male and four female specimens.

MILTOGRAMMA.

Miltogramma, Meigen, in Iliger’s Magaz. ii. p. 280 (1803).

The Central-American collections before me contain four species of this genus, which

well-detined by its short antenne, very weak macrochete, and peculiar facies. These

ecies belong to the group distinguished by the presence of vibrisse, and for the recep-

tion of which Rondani has formed his genus Sphixapata.

1. Anal segment grey, concolorous with the preceding segments. 2.

Anal segment rufous. . . 2. . .

2. Antenne black . . . 2. 1 1 1. 1 we. . . . . trilineata, v. d. Wulp.

Antenne red. 2. . . - . . . fulvicornis, v. d. Wulp.

8. Frontal band rufous ; stripes of the thorax obsolete . - . . erythrura, v. d. Wulp.

Frontal band black ; thorax with three distinct black stripes . sarcophagina, v. d. Wulp.

MILTOGRAMMA. 89

1. Miltogramma trilineata, sp.n., 9.

Cinereous ; antenne and legs black; frontal band blackish ; thorax anteriorly with three black lines; second

and third abdominal segments each with three trigonal blackish spots.

Length 6 millim.

Head whitish; front narrower than the eyes; frontal band blackish, but sometimes less conspicuous in a

greyish reflection ; frontal bristles very short, on each side in a single row, not descending beneath the

root of the antenne; towards the vertex some other bristles are inserted laterally ; a pair of short

vibrisse at some distance above the oral margin. Antenne reaching to half the face; third joint a little

longer than the second ; arista thickened in its proximal half. Proboscis black ; palpi rufous, very small,

nearly rudimentary. Thorax with three obsolete blackish stripes, the median stripe anteriorly divided

into three more distinct black lines. Abdomen conical ; first segment black; the following two segments

cinereous, with three blackish trigonal spots on the hind margins; anal segment cinereous, with a

scarcely visible dorsal stripe, this being the prolongation of the median spot on the preceding segment ;

anus shining black; a pair of weak macrochete on the hind margin of the first and second segments,

and a row of similar macrochete: on that of the third segment. Legs with some short and weak bristles.

Tegule whitish. Wings not longer than the abdomen, greyish ; small cross-vein under the end of the

first vein and on the middle of the discal cell; curvation of the fourth vein with an acute angle; apical

cross-vein oblique, concave at the base and for the rest straight ; posterior cross-vein very slightly curved.

Hab. Mexico, Presidio (forrer).

A single female specimen.

ony Se ke ©

a Loe Lo, oh a)

2. Miltogramma fulvicornis, spn, 2. “~° > ~ /

Cinereous ; frontal band black ; thorax anteriorly with black lines ; hind borders of the abdominal segments

blackish ; antenne reddish.

Length 8 millim. .

Greyish-cinereous. Front much narrower than the eyes, yellowish-cinereous ; frontal band black, linear ;

frontal bristles short, on each side in a single row, not descending beneath the root of the antenne ; face

and cheeks white; two short vibriss at some distance above the oral margin. Antenne as long as half

the face; basal joints rufous; second joint with a short bristle; third joint bright yellowish-red, twice

as long as the second; arista black, thickened in its proximal half. Proboscis black ; palpi rufous, very

small. Thorax light cinereous, at the sides nearly white, anteriorly with five rather obsolete black lines,

the median three of which are close together and a little more distinct. Abdomen conical, convex ; first

segment black ; the following segments light cinereous, with blackish hind borders, which in the middle

are more or less extended in a dorsal stripe and at the sides into two lateral spots; some short macro-

cheete are on the hind margins of the segments. Legs black, with some short and weak bristles.

Tegule white. Wings not longer than the abdomen, nearly hyaline ; small cross-vein on the middle of

the discal cell ; apical cross-vein oblique and concave ; posterior cross-vein nearly straight.

Hab. Mexico, Dos Arroyos 1000 feet and Amula 6000 feet, both in Guerrero

(H. H. Smith).

A female specimen from each locality.

3. Miltogramma erythrura, sp.n., .

Cinereous ; antenne and legs black ; frontal band rufous; thorax with obsolete stripes ; abdomen with blackish

spots; anal segment rufous, with a whitish front border.

Length 7°5 millim.

Greyish-cinereous. Face and sides of the front whitish; front narrower than the eyes; frontal band rufous,

laterally with a row of short bristles not descending beneath the root of the antenneg ; a pair of vibrissw

at some distance above the oral margin, the latter bearing some shorter bristles. Third joint of the

BIOL. CENTR.-AMER., Dipt., Vol. II., March 1890. . n

90 | DIPTERA.

antenne a little longer than the second; arista thickened for less than the proximal half. Thoracic

dorsum with very indistinct darker stripes; pleura whitish-grey. Abdomen conical, convex; second

and third segments of equal length and a little longer than the first, each with three, rather obsolete,

oblong, blackish spots, the lateral spots more trigonal; anal segment pale rufous, the front border with

a whitish tomentum; on the hind margin of the second segment two weak macrochextz, on that of the

third and fourth segments a row of similar macrochexte. Legs with some short and weak bristles.

Tegule white. Wings not longer than the abdomen, with scarcely any grey tint; venation as in the

preceding species.

Hab. Mexico, Presidio (forrer).

A single male specimen.

4. Miltogramma sarcophagina, sp.n., 2.

Cinereous ; frontal band, antennew, and legs black; thorax with three black stripes; abdomen tessellate, the

anal segment rufous.

Length 7°5 millim.

Allied to the preceding species (1. erythrura) and perhaps the other sex of it. The frontal band is black and .

becomes a little broader towards the vertex; on the hind lateral part of the front are inserted some

bristles; on the thoracic dorsum are three distinct black stripes, the median stripe prolonged over the

scutellum ; the blackish spots on the abdomen are arranged in three longitudinal rows; legs, tegule, and

wings as in WM. erythrura, but the foot-claws and pulvilli are shorter.

The insect resembles at first sight a small Sarcophaga.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

A second specimen, from Amula 6000 feet, in Guerrero (H. H. Smith), differs in the

more diffuse and obsolete dark markings of the thorax and abdomen.

BRACHYCOMA.

Brachycoma, Rondani, Dipt. Ital. Prodr. iii. p. 203 (1859).

This genus agrees with Mystacella, Meigenia, and Macquartia in the vibrisse being

inserted at some distance above the oral margin. From Mystacella and Macquartia it

differs in having the eyes bare; from Meigenia in having the curvation of the fourth

vein rectangular or almost so, and the apical cross-vein more or less concave.

The type of the genus Brachycoma is the European Tachina devia, Meig., of which

Meigenia bombivora (v.d. Wulp, Tijdschr. voor Ent. xii. p.142)is a synonym. A second

species, B. metopiella, from Italy, was described by Rondani. No less than twenty species

from Central America belong to it. |

1. Second antennal joint elongate, the third not longer than the

second. 2. 2. 1. 1 ee ee ew ew ww we. batticeps, v. d. Wulp.

Second antennal joint short, the third at least twice as long

as the second . . 2. 2 1. 1 ee ee eee ee

2. Black species (with scarcely any whitish or greyish tomentum),

with indistinct stripes on the anterior part of the thorax . afra, v. d. Wulp.

12.

13.

14.

15.

16.

Grey or cinereous species, usually with conspicuous stripes on

the thorax

Anal segment rufous or ochraceous, in coloration contrasting

with the preceding segments os . oe

Anal segment of the same coloration as the preceding segments

. Cheeks with a deep transverse groove extending from the

facial ridges to the lower limit of the eyes; eyes not

BRACHYCOMA.

descending beneath the vibrissz

Cheeks without such a groove; eyes descending beneath the

vibrissz

Antenne rufous

Antenne black

. Scutellum testaceous

Scutellum cinereous .

Abdomen cinereous, with irregular black reflecting spots ;

smaller species (5°5 millim.)

. Antenne, or at least their basal joints, rufous

Antenne wholly black

. Abdomen light grey, with black “reflecting spots, which are

arranged in three rows ; larger species (8°5 millim. or more)

. Frontal bristles on each side in a double row .

Frontal bristles on each side in a single row .

. Legs partly rufous ; abdomen yellowish-rufous

Legs wholly black ; abdomen cinereous or testaceous .

. Posterior cross-vein nearly in the middle between the small

cross-vein and the curvation of the fourth vein .

Posterior cross-vein distinctly beyond the middle between the

small cross-vein and the curvation of the fourth vein

Hind tibie outwardly fringed with bristles of equal length,

which are placed close to each other .

Hind tibiz outwardly with bristles of unequal length, ‘and if

somewhat fringe-like with a longer bristle at or beneath

the middle

Frontal bristles on each side | in a double row or somewhat

irregular

Froutal bristles on each side in a single row .

Palpi rufous; larger species (10 millim.) .

Palpi black ; smaller species (6 millim.)

Frontal band as broad as the lateral portions.

Frontal band narrower than the lateral portions .

Bristles above the vibrissee mounting to nearly half the face ;

palpi rufous .

Bristles above the vibrisse few i in number and not mounting

on the face; palpi black .

Fo Biot

foveata, v.d. Wulp.

robusta, v. d. Wulp.

ruficauda, v. d. Wulp.

trifida, v. d. Wulp.

pygmea, v. d. Wulp.

12.

biseriata, v. d. Wulp.

10.

pallidula, v. d. Wulp.

11.

sublucens, v. d. Wulp.

subtilipalpis, v. d. Wulp.

fimbriata, v. d. Wulp.

13.

14.

15.

trregularis, v. d. Wulp.

nigripalpis, v.d. Wulp.

16.

17.

barbatula, v. d. Wulp.

incompta, v. d. Wulp.

n 2

92 DIPTERA.

17. Arista thickened to beyond the middle. . . . . .. . 18

Arista thickened only to the proximal half . . . . . . 19.

18. Scutellum testaceous . . . 2. . 1. . 1. ee ee) dongicornis, v. d. Wulp.

Scutellum concolorous with the thorax . . . . . . . Striatella, v.d. Wulp.

19. Anal segment unicolorous grey or slightly ochraceous . . cineracea, v. d. Wulp.

Anal segment grey, posteriorly shining black . . . . . spuria, v.d. Wulp.

1. Brachycoma laticeps, sp. n.,¢ ¢.

Cinereous ; head ochraceous, broader than the thorax ; front broad, with a blackish stripe on each side of the

frontal band ; thoracic stripes, antenn, palpi, and legs black; abdomen with blackish reflections ; anal

segment fulvous or ochraceous.

Length 11 millim. .

Head bright ochraceous; antennal grooves greyish-black; front with black hairs—in the male strongly

narrowed behind, in the female much broader than the eyes; frontal band black, narrow, and between

it and the orbits of the eyes a blackish stripe, which in the female is beset with a row of bristles; the

usual frontal bristles descending on each side in a curved row as far as the end of the first antennal joint ;

eyes descending to the vibrisse ; beard whitish. Antenna much shorter than the face; second joint

elongate, with some bristles ; third joint as long as the second ; arista thickened to the proximal half.

Proboscis black; palpi rufous (¢) or black (2). Thorax cinereous, with four black stripes—the outer ~

stripes extending over the whole length, the intermediate ones to a little beyond the transverse suture ;

a fifth blackish stripe in the middle, extending from the hind margin to near the suture; pleure partly

grey or ochraceous; scutellum cinereous, with a blackish reflecting spot. Abdomen broadly ovate,

convex, cinereous, with blackish reflecting spots and a black dorsal stripe; the intermediate segments

laterally somewhat testaceous ; anal segment bright fulvous or ochraceous; macrochextz rather short, -

only on the hind margins of the last two segments. Front tibia outwardly with a double row of bristles ;

middle tibiz with some longer bristles ; hind tibiee outwardly fringed with short bristles from the base to

beyond the middle, where a longer bristle appears ; foot-claws and pulvilli of the male a little longer than

in the female. Tegule whitish. Wings greyish-hyaline; small cross-vein oblique, a little before the

middle of the discal cell ; apical cross-vein nearly straight ; posterior cross-vein slightly curved.

Hab. Mexico, Rio Papagaio 1200 feet and Rincon 2800 feet, both in Guerrero, Teapa

in Tabasco (H. H. Smith).

A male and some female specimens.

2. Brachycoma afra, sp. n., 3 (¢ 2).

Shining black ; head whitish ; abdomen with grey reflections; antenne, palpi, and legs black.

Length 7:5 millim.

3g. Head white, with brownish-grey reflections ; front narrower than the eyes; frontal band black; frontal

bristles on each side in a single row ; vibrissz surmounted by some shorter bristles; eyes descending to

the vibrisse. Antenne: shorter than the face ; second joint bristly ; third joint four times as long as the

second ; arista thickened to the proximal half; palpi black, somewhat dark rufous at the tip. Thoracic

dorsum before the transverse suture with some grey tomentum and five black lines, which, however, are

not always conspicuous ; scutellum with grey reflections. Abdomen broadly ovate; the grey reflections

appear on the front borders of the second and following segments ; a black dorsal stripe is usually visible ;

the second segment is slightly testaceous at the sides ; macrochete are only on the hind margins of the

last two segments. Middle tibia with some long bristles; hind tibiae outwardly nearly fringed ; foot-

claws and pulvilli elongate, the pulvilli yellowish. Tegule greyish-yellow. Wings greyish-hyaline, on

the base up to the humeral cross-vein anteriorly with bristles; small cross-vein a little before the middle

of the costal cell; apical cross-vein slightly concave ; posterior cross-vein somewhat sinuate.

Hab. Mexico, Teapa in Tabasco (Hl. H. Smith).

BRACHYCOMA. 93

A single male specimen.

An example from Amula, Guerrero 6000 feet (H. H. Smith), is probably the female

of the same species. This has the thorax and scutellum unicolorous shining black ;

the abdomen densely beset with short black pile, and some short macrochete on the

hind margins as well as on the disc of the segments.

3. Brachycoma foveata, sp. n., ¢ 9. (Tab. III. figg. 12; 12a, head in

profile. )

Cinereous ; frontal band, four stripes on the thorax, first abdominal segment, two large spots on the second

and third segments, antennx, and legs black ; palpi and anal segment rufous,

Length 11 millim.

Head as broad as the thorax, yellowish-white, with brownish reflections ; cheeks broad and swollen, with a

deep transverse groove extending from the favial ridges to the lower limit of the eyes ; front somewhat

prominent, narrowed behind and there scarcely as broad as the eyes, in the female broader; frontal band

black, the band divided on the vertex; frontal bristles descending on each side in a single row beneath

the root of the antenne ; the female with some lateral bristles ; the upper portion of the cheeks with some

weak black hairs ; eyes descending to the vibrisse, in the male with a scarcely perceptible microscopical

pilosity. Antenne distinctly shorter than the face, the basal joints slightly rufous ; third joint more than

three times as long as the second ; arista thickened to the proximal half. Proboscis black ; palpi rufous.

Thorax whitish-grey, with four black stripes, which are prolonged behind the transverse suture; scutellum

blackish at the base, and with a brown central reflecting spot. Abdomen oblong-ovate, grey; the first

segment black; on each of the following two segments are two large blackish-brown reflecting spots,

which do not reach the front borders ; anal segment rufous, with a yellowish-white tomentum on the front

margin; on the hind margin of the second segment are two macrochetae, on that of the third segment is

a row of eight longer macrochete ; on the anal segment a double row of similar macrochete. Legs with

scattered bristles ; foot-claws and pulvilli somewhat elongate in the male, the pulvilli narrow and yellowish.

Tegule whitish. Wings grey; small cross-vein on or a little before the middle of the discal cell; apical

cross-vein slightly curved; posterior cross-vein distinctly curved in the male, slightly concave in the

female.

Hab. Mexico, Amula in Guerrero 6000 feet, Teapa in Tabasco (7. H. Smith); Costa

Rica, Cache (fogers).

A male and three female specimens.

4. Brachycoma robusta, sp. n.,¢ 2.

Cinereous ; thoracic stripes, reflecting spots, and a dorsal stripe on the abdomen black; anal segment pale

rufous ; antenne and palpi rufous; legs piceous or black.

Length 11 millim.

Head as broad as the thorax, pale yellow, with greyish reflections; cheeks without transverse groove (this

being present in the preceding species); front a little prominent, narrowed behind and there narrower

than the eyes; frontal band blackish-grey, as broad as the pale yellow lateral portions; frontal bristles

descending on each side in a single row as far as the end of the second antennal joint; eyes reaching

to beneath the vibrisse. Antenne rufous, much shorter than the face; second joint with some black

bristles ; third joint brownish, narrow, more than twice as long as the second. Thorax light cinereous,

with four black stripes, which are two and two united towards the hind margin; scutellum with a

brownish reflecting spot. Abdomen conical, cinereous, with blackish reflections and a black dorsal stripe,

the stripe prolonged over the rufous anal segment; some very short and weak macrochete are on the

hind margins of the last three segments. Legs apparently black ; but in the male the coxe, the base of

the femora, and the posterior tibiz are somewhat rufo-piceous; front tibise anteriorly with a row of short

94 DIPTERA.

bristles ; posterior tibiee with some longer bristles ; foot-claws and pulvilli elongate in the male. Tegule

grey, with a white margin. Wings greyish; small cross-vein a little before the middle of the discal cell ;

apical and posterior cross-veins slightly.curved.

Hab. Mexico, Xucumanatlan 7000 feet in Guerrero, Atoyac in Vera Cruz (H. H.

Smith).

A male and a female specimen.

5. Brachycoma, ruficauda, sp. n., 2.

Blackish-cinereous; head whitish ; thorax with four black lines; scutellum testaceous; abdomen with grey

front borders to the segments ; anal segment and palpi rufous; antenne and legs black.

Length 7°5 millim.

Front cinereous, broader than the eyes ; frontal band dark brown, narrower than the whitish lateral portions ;

frontal bristles on each side in a double row, descending as far as the end of the second antennal joint ;

face and cheeks whitish ; vibrissee surmounted by some short hairs ; eyes descending beneath the vibriss#.

Antenne much shorter than the face; second joint bristly ; third joint two or three times as long as the

second; arista thickened to beyond the proximal half. Proboscis black; palpi pale rufous, curved upwards

and thickened towards the tip. Thorax blackish, with a cinereous tomentum, which is most conspicuous

before the transverse suture, and with four slender black stripes; pleure cinereous ; scutellum reddish-

testaceous. Abdomen ovate; first segment black; second and third segments black, with more or less

extended whitish or cinereous reflections on the front borders; a black dorsal stripe is always visible ;

anal segment rufous, with a whitish front border ; a pair of strong macrochete on the hind margin of the

second segment, a row of similar macrochete on that of the third segment; anal segment with many

shorter macrocheete ; ventral surface brown, with whitish reflections. Front tibiz outwardly with short

bristles ; middle tibiee with some long bristles; the bristles on the outer edge of the hind tibia nearly

fringe-like; foot-claws and pulvilli short. Tegule whitish. Wings greyish-hyaline; small cross-vein

before the middle of the discal cell; curvation of the fourth vein forming a rectangle; apical cross~vein

concave ; posterior cross-vein oblique and curved.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

Two female specimens.

6. Brachycoma trifida, sp.n.,¢ ?.

Grey ; frontal band, four stripes on the thorax, three stripes on the abdomen, antenne, palpi, and legs black ;

anal segment rufous.

Length 8:5-10 millim.

Head of the male yellowish-white, of the female ochraceous; front as broad as the eyes, slightly narrowed

behind, in the female broader; frontal bristles short and weak, on each side in a double row and descending

to beneath the second antennal joint, the outer row less distinct in the female; eyes descending to the

vibrissee. Antenne shorter than the face; second joint bristly; third joint three times as long as the

second ; arista thickened to the proximal half ( ¢ ) or to a little beyond the middle( 2). Proboscis black ;

palpi black, sometimes slightly rufous at the tip. Thorax with very conspicuous black stripes, the outer

stripes continued behind the transverse suture ; scutellum cinereous, with a blackish reflecting spot on the

disc, sometimes a little rufous at the hind margin. Abdomen ovate, light grey; the first three segments

with a black hind margin and black reflecting spots, which appear in three rows; anal segment rufous,

with ochraceous tomentum; macrochetz on the hind margin of the third segment and on the anal

segment; sometimes a pair of short macrochete on the hind margin of the second segment. Legs with

rather short bristles, those on the outer edge of the hind tibie somewhat fringe-like: foot-claws and

pulvilli elongate in the male; the pulvilli yellow. Tegule white. Wings nearly hyaline; small cross-

vein a little before the middle of the discal cell; apical and posterior cross-veins slightly concave.

BRACHYCOMA. . 95

Hab. Mexico, Venta de Zopilote 2800 feet, Acaguizotla 3500 feet, Chilpancingo

4600 feet, all in Guerrero (H. H. Smith). |

Two male and two female specimens.

7. Brachycoma pygmea, sp. n., °.

Cinereous; four thoracic stripes, reflecting spots on the abdomen, antenne, and legs black; anal segment

ochraceous ; palpi rufous.

Length 5:5 millim. .

Head whitish, a little broader than the thorax; front much broader than the eyes; frontal band blackish-

brown ; frontal bristles somewhat irregularly descending as far as the end of the second antennal joint 5

cheeks immediately under the frontal bristles with a subtrigonal brown spot; exterior to the facial ridges

are some bristly hairs. Antenne shorter than the face; second joint short, bristly ; third joint four

times as long as the second. Proboscis black; palpi pale rufous. Thorax and scutellum cinereous ;

thoracic dorsum with four black stripes. Abdomen ovate; first segment black; second and third seg-

ments cinereous, with irregular black reflections; anal segment ochraceous ; macrochete on the hind

margins of the-second and following segments. Front tibie with short bristles; middle tibis with some

longer bristles; hind tibie outwardly with several bristles of unequal length. Tegule white. Wings

greyish, along the costa with a brownish-yellow tint ; small cross-vein a little beyond the middle of the

discal cell ; apical cross-vein slightly curved ; posterior cross-vein nearly straight.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen.

8. Brachycoma biseriata, sp. n., 3 2.

Cinereous ; face whitish ; scutellum and abdomen testaceous; basal joints of the antenne reddish ; third

antennal joint, some thoracic stripes, a dorsal stripe on the abdomen, hind margins of the second and

third segments, and legs black ; anus and palpi rufous; frontal bristles on each side in a double row.

Length 10-11 millim.

Face and cheeks white; front cinereous, on the vertex at least as broad as the eyes. Antenne slender ; the

basal joints dark rufous; the third joint black, twice as long as the second; arista.thickened to the

proximal two-thirds. Palpi pale rufous, curved upwards. Abdomen testaceous ; first segment black; the

following segments with whitish-grey front borders, their hind margins and a dorsal stripe black; anus

rufous; macrochete short and weak, sometimes scarcely perceptible among the black pilosity. In both

sexes the frontal bristles form a double row on each side of the frontal band ; exterior to these bristles is

a short but dense pilosity. In the female sometimes a fifth stripe appears between the two median

stripes on the thorax. The small cross-vein is situated on or a little before the middle of the discal cell ;

apical cross-vein oblique ; posterior cross-vein distinctly curved.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet, Atoyac in Vera Cruz, Teapa in

Tabasco (H. H. Smith).

Two male and three female specimens.

9. Brachycoma pallidula, sp. n., ¢.

Yellowish-rufous; thorax cinereous, with four dark lines; abdomen transparent, with a dorsal band and the

hind border of the third segment black; anal segment dark rufous ; legs partly rufous.

Length 7°5 millim.

Head not broader than the thorax, yellowish-rufous, the median part of the face pale yellow; occiput grey ;

front not prominent; frontal band not differing in coloration from the lateral portions; frontal bristles

DIPTERA.

short and weak, on each side in a single row, and descending to the number of three beneath the root.

of the antenne. Eyes descending beneath the vibrisse ; oral margin strongly elevated in the middle ;

beard pale yellow. Antenne pale rufous, short, not reaching lower than half the face ; third joint twice

as long as the second; arista black, slightly thickened at the base. Proboscis black, the base and the

terminal lips rufous; palpi rufous. Thorax pale cinereous, with four blackish lines, a whitish rough

pile, and black bristles ; scutellum ochraceous. Abdomen conical, yellow, transparent ; a large black spot

on the middle of the first segment and a black dorsal band on the following two segments, the band on the

third segment laterally extended along the hind border; anal segment brownish-rufous ; all the segments

have a narrow whitish front margin, interrupting the dorsal band; macrochete are only on the hind

margins of the third and anal segments, a lateral one on that of the second. Legs rufous, with scattered

bristles ; coxze cinereous, with yellowish pile; the tips of the hind femora and tibia brown ; all the tarsi

black ; foot-claws and pulvilli very short. Tegule large, pale yellow. Wings hyaline ; small cross-vein

on the middle of the discal cell ; apical cruss-vein slightly concave ; posterior cross-vein nearly straight.

Hab. Mexico, Temax in North Yucatan (Gaumer).

A single female specimen.

This species differs from ail the others of the genus by its slender form and peculiar

coloration.

10. Brachycoma sublucens, sp. n., ¢.

Cinereous; frontal band, antenne (except the basal joints, which are rufous), four thoracic stripes, and legs

black ; abdomen grey, with brown reflections, laterally yellowish, somewhat transparent ; palpi rufous,

very slender.

Length 7 millim,

Head whitish, with grey reflections; front narrowed behind, on the vertex nearly half as broad as the eyes ;

frontal band brownish-black, broader than the whitish lateral portions ; a white point before the root of -

the antenne ; frontal bristles descending on each side in a single row as far as the end of the second

antennal joint; vibrissee accompanied by some other bristles; eyes descending beneath the vibrisse ;

beard whitish. Antenne reaching to half the face; basal joints dark rufous; third joint black, twice as

long as the second; arista thickened at the base. Proboscis black; palpi pale rufous, very slender, with

black hairs. Thorax and scutellum cinereous; thoracic dorsum with four black stripes. Abdomen ovate,

convex, grey, with brown reflecting spots, the spots forming dark hind borders to the segments and an

interrupted dorsal stripe; the sides yellowish, slightly transparent ; macrochete on the hind margins of

the second and following segments. Posterior tibie with scattered bristles ; foot-claws and pulvilli elon-

gate, the pulvilli greyish. Tegule greyish. Wings nearly hyaline; small cross-vein on or a little before

the middle of the discal cell; curvation of the fourth vein with a blunt angle; apical cross-vein oblique

and a little concave ; posterior cross-vein less oblique, slightly curved, and nearly in the middle between

the small cross-vein and the curvation of the fourth vein.

Hab. Mextco, near the city (H. H. Smith).

A single male specimen.

11. Brachycoma subtilipalpis, sp.n., ¢ @.

Cinereous ; face white or yellowish; abdomen testaceous or cinereous; basal joints of the antenne rufous ;

frontal band, third antennal joint, four thoracic stripes, and legs black; palpi yellowish, very slender ;

frontal bristles on each side in a single row.

Length 7:5-10 millim.

Front yellowish-cinereous, in the male narrowed behind and there scarcely as broad as the eyes, in the female

a little broader ; frontal band narrower than the pale lateral portions ; frontal bristles descending on each

_ side in a single row as far as the end of the second antennal joint; vibrissee accompanied by several

BRACHYCOMA. 97

shorter bristles ; eyes descending beneath the vibrisse; beard whitish, Antenne distinctly shorter than

the face ; basal joints and the base of the third joint rufous; second joint with black bristles; third joint

three times as long as the second; arista thickened to the proximal half. Proboscis black; palpi yellowish

or pale rufous, very slender, almost rudimentary, with long hairs towards the tip. Thorax with greyish-

cinereous tomentum and four black stripes, which are interrupted at the transverse suture ; scutellum

cinereous. Abdomen ovate, testaceous in the male, cinereous in the female; first segment black; the

following segments with black and greyish reflections and a white front margin; macrochste only at the

hind margins of the third and fourth segments ; in the male the first two ventral segments are black with

grey front borders, the third testaceous, and the apical segment rufous; in the female the ventral surface

is blackish-grey. Hind tibise of the male outwardly fringed, but with some longer bristles ; in the female

with bristles of unequal length. Tegule grey, with a yellowish margin. Wings greyish-hyaline; small

cross-vein before the middle of the discal cell; apical and posterior cross-veins oblique and curved.

Hab. Mexico, Rincon, Venta de Zopilote 2800 feet, Acaguizotla 3500 feet, all in

Guerrero, Atoyac in Vera Cruz (H. H. Smith).

A female and several male specimens.

12. Brachycoma fimbriata, sp.n., ¢ ¢.

Blackish ; thorax grey, with four black stripes; front borders of the abdominal segments whitish; antenna,

palpi, and legs black ; hind tibie outwardly fringed; scutellum and the sides of the abdomen testaceous

in the male.

Length 10°5-11°5 millim.

Front cinereous, narrowed behind, on the vertex scarcely as broad as the eyes; frontal band black ; frontal

bristles in the male short, weak, on each side in a single row, in the female somewhat stouter and in a

double row, descending to beneath the second antennal joint; face and cheeks white ; vibrisse surmounted

by several shorter bristles, reaching to nearly half the face; beard white. Antenne shorter than the face ;

second joint bristly ; third joint three times as long as the second; arista thickened to beyond the middle.

Proboscis and palpi black, the palpi with a more or less rufous tip. The four black stripes on the thoracic

dorsum interrupted at the transverse suture ; scutellum testaceous in the male, blackish in the female.

Abdomen black, at the sides usually testaceous, especially in the male; second and following segments

with whitish reflections on the front borders; macrochet on the hind margin of the third segment and

on the anal segment, in the male less conspicuous among the black hairs. Legs with weak bristles; hind

tibies outwardly fringed with bristles ; foot-claws and pulvilli rather elongate in the male, the pulvilli

yellowish. Tegule whitish. Wings nearly hyaline; small cross-vein a little before the middle of the

discal cell; apical cross-vein concave ; posterior cross-vein curved.

Hab. Mexico, Amula 6000 feet in Guerrero (H. H. Smith), Atoyac in Vera Cruz

(Schumann). |

Two male and five female specimens.

13. Brachycoma irregularis, sp.n., ¢.

Cinereous ; face white; frontal band, four thoracic stripes, hind margins of the abdominal segments, antenne,

and legs black; scutellum testaceous; palpi rufous; frontal bristles on each side in a double row.

Length 10 millim.

Front cinereous, narrowed behind and there narrower than the eyes; frontal band much narrower than the

pale lateral portions ; frontal bristles on each side in a double row, or somewhat irregular, reaching as far

as the end of the second antennal joint ; face white, silvery ; eyes descending a little beneath the vibrisse,

which are surmounted by some shorter bristles; beard whitish. Antenne reaching nearly as far as the

vibrissee ; second joint bristly ; third joint three times as long as the second; arista thickened to beyond

the proximal half. Proboscis black; palpi rufous, cylindrical, curved upwards, and with black hairs

BIOL. CENTR.-AMER., Dipt., Vol. II., March 1890. 0

98 DIPTERA.

beneath. Thorax obscure cinereous, with four black stripes; scutellum testaceous. Abdomen ovate,

cinereous, laterally testaceous ; first segment black ; second and third segments with a black dorsal stripe

anda black hind margin; anus black ; macrochete on the hind margins of the second and third segments,

and several on the anal segment, the latter also densely beset with black hairs; ventral surface testaceous,

in the middle shining black. Middle tibie with some long bristles; hind tibis outwardly nearly fringe-

like with bristles; foot-claws and pulvilli elongate, the pulvilli yellowish. Tegule whitish. Wings

greyish-hyaline, on the base and costa with a yellowish tint; small cross-vein on the middle of the discal

cell; apical cross-vein a little concave ; posterior cross-vein oblique and nearly straight.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single male specimen.

14. Brachycoma nigripalpis, sp. n., ¢ ?.

Cinereous or somewhat ochraceous ; frontal band, four thoracic stripes, reflecting spots (more or less in three

series) on the abdomen, antenne, palpi, and legs black.

Length 6-5-8°5 millim.

Greyish-cinereous, the front always, and sometimes the cheeks and even the whole body, more or less ochra-

ceous. Front narrowed behind, in the female not broader than in the male; frontal band narrow ;

frontal bristles on each side in a double row; eyes descending to the vibrisse. Antenne a little shorter

than the face; second joint bristly ; third joint sometimes rufous at the base, three times as long as the

second; arista thickened to the proximal half. Thoracic dorsum with four rather broad black stripes,

which are prolonged to near the posterior margin ; scutellum with a brown reflecting spot near the tip.

Abdomen ovate ; first segment black; second and third segments with a black hind margin, black dorsal

stripe, and two blackish-brown lateral reflecting spots; a row of macrochetz on the hind margin of the

third segment, and a double row of shorter macrochet on the anal segment (in some specimens there are

vestiges of a pair of macrochete on the hind margin of the second segment); anal segment densely haired

beneath. Front tibiee outwardly with short bristles; middle tibiee with three or four longer bristles ; hind

tibia outwardly fringed and towards the apex with bristles of unequal length. Tegule whitish. Wings

greyish-hyaline, sometimes slightly infuscated along the costa; small cross-vein a little before the middle

of the discal cell; curvation of the fourth vein forming nearly a blunt angle; apical cell rather widely

opened ; apical cross-vein almost straight ; posterior cross-vein very slightly curved.

Hab. Mexico, Dos Arroyos 1000 feet, Venta de Zopilote 2800 feet, both in Guerrero,

Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith). |

Several specimens of each sex.

In the less rectangular curvation of the fourth vein and the rather regular spots on

the abdomen this species has some affinity with the genus Meigenia.

15. Brachycoma barbatula, sp.n., ¢ ¢.

Cinereous; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne, and legs black ;

palpi rufous; bristles above the vibrissee mounting to nearly half the face.

Length 8 millim.

Front cinereous, in the male narrowed behind and there as broad as the eyes, in the female broader ; frontal band.

as broad as the paler lateral portions; frontal bristles on each side in a curved row, descending to beneath

the second antennal joint, and exterior to these in the female are several other bristles ; face and cheeks

yellowish-white ; above the vibrissz a row of shorter bristles, reaching to nearly half the face. Antenne

descending to near the vibrisse ; second joint bristly ; third joint four or five times as long as the second ;

arista thickened to the proximal half. Proboscis black; palpi rufous, infuscated at the base, slightly

enlarged towards the tip. Thorax cinereous, with four black stripes, which become diffuse behind the

transverse suture; scutellum cinereous, blackish at the base, in some specimens slightly testaceous at the

BRACHYCOMA. 99

hind margin, Abdomen ovate; first segment black; the following segments cinereous, with black hind

borders and blackish reflecting spots ; a black dorsal stripe is usually conspicuous; sometimes the second

and third segments in the male show a tendency to become testaceous laterally ; macrochete are on the

hind margins of the second and following segments. Middle tibis with some long bristles ; hind tibia

outwardly with a row of shorter and with some longer bristles ; foot-claws and pulvilli elongate in the

male, the pulvilli yellowish. Tegule whitish. Wings nearly hyaline; small cross-vein a little before

the middle of the discal cell; apical cross-vein slightly concave; posterior cross-vein nearly straight.

fab. Mexico, Venta de Zopilote 2800 feet and Amula 6000 feet, in Guerrero

(1. H. Smith).

Several specimens of each sex.

16. Brachycoma incompta, sp. n., ¢.

Cinereous ; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne, palpi, and legs.

black.

Length 8°5 millim. .

Allied to the preceding species, but differing in the black palpi. The blackish frontal band is sometimes incon-

spicuous; the face and cheeks have more cinereous reflections; only immediately above the vibrisse are

some shorter bristles. The antenne are broader, the third joint proportionally shorter (three times as

long as the second). The macrochete on the abdomen, the legs, and the bristles on the latter are stouter.

The apical cross-vein is nearly straight.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen.

17. Brachycoma longicornis, sp. n., 3 (92).

Blackish, partly with grey tomentum; thorax with indistinct black stripes; scutellum testaceous; head

whitish; frontal band, antenne, and legs black ; palpi rufous.

Length 8°5 millim.

Head white, with dark grey reflections ; front narrowed behind and there nearly as broad as the eyes ; frontal

band brownish-black, a Jittle narrower than the white lateral portions ; frontal bristles on each side in a

single row, descending to the number of five beneath the root of the antenne ; vibrisse accompanied by

several other bristles ; eyes descending to a little beneath the vibrisse. Antenne black, anteriorly with a

white reflection ; second joint short-haired ; third joint four times as long as the second, reaching as far

as the vibrisse ; arista thickened to the proximal half. Proboscis black; palpi rufous, elongate, slightly

thicker towards the tip. Thorax black, with some grey tomentum and four not very distinct black lines ;

scutellum testaceous, blackish at the base, and with grey tomentum. Abdomen ovate, black, with grey

and white reflections on the front borders of the second and following segments ; second and third segments

at the sides slightly testaceous ; a row of macrocheetee on the hind margin of the third segment and

several macrochete on the anal segment. Front tibie outwardly with a row of short bristles; middle

tibis: with several long bristles ; hind tibize outwardly with bristles of unequal length. Tegul whitish,

Wings greyish-hyaline, with a slight brownish tint at the base; small cross-vein a little before the middle

of the discal cell ; apical cross-vein somewhat concave at its base, for the rest straight ; posterior cross-

vein curved.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single male specimen.

A. female example from Amula, Guerrero 6000 feet (H. H. Smith), is possibly the

other sex of the same species. It has, however, the seutellum at the hind margin only

100 DIPTERA.

somewhat testaceous; the palpi black, with the exception of the tips; the stripes on .

the thoracic dorsum more distinct, at least before the transverse suture ; and the poste-

rior cross-vein nearly straight.

18. Brachycoma striatella, sp.n., ¢ 9.

Grey or somewhat ochraceous ; frontal band, four thoracic stripes, reflecting spots (more or less in three series)

on the abdomen, antenne, and legs black; palpi rufous.

Length 6 millim.

Head similar in coloration to the body (in some specimens grey, in others more ochraceous) ; front of the male

narrowed behind, in the female broader than the eyes; frontal band narrow; frontal bristles on each

side in a single row, three of them close to the root of the antenne; eyes descending to the vibrisse,

which are surmounted by some shorter bristles. Antenne reaching nearly as far as the vibrisse ; second

joint with short bristles; third joint three times as long as the second; arista thickened to beyond the

middle. Proboscis black ; palpi rufous, thickened towards the tip. Thoracic dorsum with four distinct

black stripes, which are united two and two behind; scutellum concolorous with the thorax. Abdomen

ovate; first segment black; the black reflections on the following segments appear in the form ofa some-

what interrupted dorsal stripe and two lateral bands ; the hind margins of the second and third segments

are shining black; a pair of macrochawte on the hind margin of the second segment and a row of macro-

cheetze on that of the third segment; several shorter bristles on the anal segment. Front tibie outwardly

with short bristles ; middle tibia with some long bristles ; hind tibie outwardly fringe-like with bristles,

and with a longer bristle at the middle and another before the tip; foot-claws and pulvilli short. Tegule

whitish. Wings hyaline; small cross-vein on or a little before the middle of the discal cell; apical and

posterior cross-veins oblique and very slightly curved.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet, Teapa in Tabasco (H. H.

Smith).

A male and three female specimens.

19. Brachycoma cineracea, sp.n., 2.

Cinereous ; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne, and legs black ; anus

not infuscated ; palpi slender.

Length 7°5 millim.

Front broader than the eyes, pale ochraceous ; frontal band narrow ; frontal bristles on each side in a curved

row, descending as far as the end of the second antennal joint; face and cheeks whitish, the upper portion

of the latter pale ochraceous; above the vibrissee some shorter bristles. Antenne descending to near the

vibrisse ; second joint with short bristles ; third joint three times as long as the second ; arista thickened

to the proximal half. Proboscis black ; palpi cylindrical, black, not thickened towards the tip, the tip

itself pale rufous. Thorax and scutellum cinereous ; thoracic dorsum with four black stripes, the median

stripes inconspicuous behind the transverse suture. Abdomen ovate; first segment black; second and

third segments cinereous, with black hind borders, blackish reflecting spots, and a black dorsal stripe ;

anal segment somewhat ochraceous (though not contrasting in coloration with the preceding segments),

and with a slight continuation of the dorsal stripe, the anus itself not darker ; macrochet on the hind

margins of the second and third segments and several shorter ones on the anal segment. Front tibiee with

a row of short bristles ; middle tibize with some long bristles ; hind tibia outwardly with short and some

longer bristles. Tegule whitish. Wings nearly hyaline; small cross-vein distinctly before the middle

of the discal cell ; apical and posterior cross-veins oblique, the apical very slightly concave, the posterior

curved inwards.

Hab. Mexico, Atoyac in Vera Cruz (Schumann).

A single female specimen.

BRACHYCOMA.—PLAGIA, 101

20. Brachycoma spuria, sp. n., 2.

Cinereous ; frontal band, four thoracic stripes, reflecting spots on the abdomen, anus, antenns,, and legs black ;

palpi rufous.

Length 6 millim.

Head somewhat ochraceous ; front as broad as the eyes; frontal band narrower than the ochraceous lateral,

portions ; frontal bristles on each side in a single row, descending as far as the end of the second antennal

joint ; above the vibrisse a row of short bristles, mounting to nearly half the face. Antenne descending

to near the vibrisse ; second joint with some short bristles; third joint four or five times as long as the

second; arista thickened to the proximal half. Proboscis black; palpi cylindrical, rufous. Thorax and

scutellum cinereous; thoracic dorsum with four black stripes, which become diffuse behind the transverse

suture ; scutellum blackish at the base. Abdomen ovate; first segment black; the following segments

cinereous, with black hind borders (also on the anal segment), blackish reflecting spots, and a black

dorsal line ; macrochetz on the hind margins of the second and following segments. Front tibie with

short bristles ; middle tibize with some long bristles; hind tibiz outwardly nearly fringe-like with bristles,

and with a long bristle below the middle. Tegule whitish. Wings nearly hyaline ; small cross-vein

a little before the middle of the discal cell; apical cross-vein slightly concave; posterior cross-vein

almost straight.

Hab. Mexico, Venta de Zopilote 2800 feet in Guerrero (H. H. Smith).

Two female specimens.

PLAGIA,

Plagia, Meigen, System. Beschr. europ. zweifliigl. Ins. vii. p. 201 (1838).

Of this genus—which is easily recognizable by the very oblique position of the

exterior cross-veins and the bristles on some of the longitudinal veins—no species has

hitherto been described from the New World. In the collections before me I find the

following Central-American species :—

]. Eyes thinly pilose . . . 2... 2 we ew. ew ) Setifrons, v. d. Wulp.

Eyes bare . . . . ~ 2 2

2. Proboscis short and rather thick, with distinct terminal lips. americana, v. d. Wulp.

Proboscis long and slender, with scarcely thicker terminal lips. 3.

3. Posterior cross-vein much nearer to the small cross-vein than

to the curvation of the fourth vem . . . . rigidirostris, v. d. Wulp.

Posterior cross-vein in the middle or beyond the middle be-

tween the small cross-vein and the curvation of the fourth

ven 5 ee ee ee we we ww ew ww ee tncognita, v. A. Walp.

1. Plagia setifrons, sp. n., 2.

Thorax and scutellum cinereous, the thorax with obsolete stripes; head white ; eyes thinly pilose; abdomen

black, with whitish front borders to the segments; third antennal joint and the legs black; palpi and

basal joints of the antenne rufous ; first, third, and fifth veins with bristles.

Length 8 millim.

Front broader than the eyes; frontal band blackish, as broad as the lateral portions; above the root of the

antennz a white, somewhat impressed, point ; frontal bristles robust but not numerous, inserted on black

points, and descending to beneath half of the eyes; inferior part of the cheeks with a rufous reflection ;

102 DIPTERA.

pilosity of the eyes only conspicuous under a lens; posterior orbits with a regular row of short black

bristles. Antenne shorter than the face; basal joints rufous ; third joint blackish, three times as long as

the second; arista thickened to less than the proximal half. Proboscis black, of the usual shape, with

distinct terminal lips; palpi cylindrical, pale rufous. Thoracic dorsum anteriorly with four not very

conspicuous black stripes, the median stripes linear. Abdomen conical; first segment black; the following

segments shining black, with whitish front borders and with some stout macrochete near the hind mar-

gins, Front tibie outwardly with short bristles; posterior tibiee with long bristles; tarsi attenuate

towards the tip; foot-claws and pulvilli short. Tegule whitish. Wings greyish-hyaline; first and third

veins with short bristles over their whole length; fifth vein with bristles only on the base ; small cross-

vein on the middle of the discal cell; apical cross-vein concave at its base; posterior cross-vein curved,

inserted beyond the middle between the small cross-vein and the curvation of the fourth vein: this curva-

tion forms a rectangle, and behind it the vein is not continued.

Hab. Muxico, Chilpancingo 4600 feet, Amula 6000 feet, both in Guerrero (H. H.

Smith).

Three female specimens.

2. Plagia americana, sp.n., ¢ 2. (Tab. III. fig. 19, wing.)

Black ; thorax with grey tomentum and four black stripes; abdomen with white reflections; palpi rufous

towards the tip ; first and third veins with bristles.

Length 7 millim.

Face and cheeks white ; front cinereous, in both sexes broader than the eyes; frontal band black, but some-

times disappearing in a greyish reflection ; frontal bristles long and stout, descending as far as the end of

the second antennal joint ; eyes bare, Antenne black, the basal joints with whitish reflections; third

joint a little longer than the second; arista thickened to beyond the middle. Proboscis black; palpi

black at the base, the somewhat thickened tips rufous. Thorax, scutellum, and abdomen black, the thorax

before the transverse suture with a whitish-grey tomentum and four black stripes; pleure greyish.

Abdomen conical; front borders of the second and following segments with whitish reflections; the second

and third segments without discal macrochete, but with rather strong marginal macrochete, the median

two of the third segment at some distance before the hind margin. Legs black, thickly beset with

bristles, those of the middle and hind tibise very long; foot-claws and pulvilli somewhat elongate in the

male, those of the front legs still longer; the pulvilli pale yellow. Tegule whitish. Wings with a grey

tint ; the first vein bristly over its whole length, the third to beyond the small cross-vein; fourth vein

slightly prolonged at its curvation ; apical and posterior cross-veins nearly straight, the posterior more

oblique than the apical.

Hab. Mexico, Orizaba (H. H. Smith & F. D. G.), Venta de Zopilote 2800 feet,

Xucumanatlan 7000 feet, and Omilteme 8000 feet, all in Guerrero, Teapa in Tabasco

(H. H. Smith).

Several specimens.

This species is closely allied to the European P. ambigua, Fall.

3. Plagia rigidirostris, sp. n., ¢. |

Black ; thorax cinereous, with four black stripes; second and following segments with grey front borders;

palpi and basal joints of the antenne rufous; proboscis slender, straight ; posterior cross-vein nearer to

the small cross-vein than to the curvation of the fourth vein.

Length 7°5-9°5 millim.

Head white, with cinereous, on the lower part with rufous, reflections ; front broader than the eyes; frontal

PLAGIA.—MASICERA. 103

band rufous-grey, as broad as the whitish lateral portions; frontal bristles stout, inserted on black points,

two of them beneath the root of the antenne ; vibrisse at some distance above the oral margin; eyes bare.

Antenne descending nearly to the vibrisse ; basal joints rufous; third joint black, twice as long as the

second; arista thickened nearly over its whole length, the penultimate joint somewhat distinct. Proboscis

shining black, exserted and straight, the terminal lips scarcely thicker; palpi very small, pale rufous.

Thorax cinereous, the black stripes linear and only conspicuous before the transverse suture; scutellum

blackish-cinereous. Abdomen conical; second and following segments for more than half their length

whitish on the front borders, and with rather short marginal macrochete; ventral surface blackish.

Front tibie with short bristles; middle and hind tibie with long bristles. Tegule whitish. Wings

greyish ; first and third veins bristly over nearly their whole length, fifth vein bristly only at the base ;

fourth vein prolonged beyond the curvation ; small cross-vein distinctly beyond the middle of the discal

cell; apical cross-vein oblique and very slightly concave; posterior cross-vein straight and at a much

shorter distance from the small cross-vein than from the curvation of the fourth vein.

Hab. Mexico, Tierra Colorada 2000 feet and Amula 6000 feet, both in Guerrero

(H. H. Smith).

Three female specimens.

4, Plagia incognita, sp. n., 9.

Black ; thorax cinereous, with four black stripes; second and following abdominal segments with grey front

borders; palpi and basal joints of the antenne rufous; proboscis slender and straight ; posterior cross-

vein in the middle between the small cross-vein and the curvation of the fourth vein,

Length 10 millim.

Allied to the preceding species, but differing in the position of the posterior cross-vein, which, moreover, is

distinctly curved outwards. The apical cell ends at a considerable distance from the tip of the wings,

which is’conspicuously rounded. The rufous coloration on the inferior portion of the head is more extended ;

the cheeks have some short and weak hairs, of which I see no trace in P. rigidirostris. It is uncertain

whether the arista is shaped as in that species (thickened to near the tip), the antennez of the unique

specimen being broken (the entire third joint of the right antenna and the arista of the left are

wanting).

Hab. Mexico, Chilpancingo 4600 feet in | Guerrero UH. H. Smith).

A single female specimen.

MASICERA.

Masicera, Macquart, Suites 4 Buffon, Diptéres, 11. p. 118 (1835).

_ The characters on which Macquart established this genus form a striking example of

uncertainty and elasticity. Therefore it is not. surprising that he included in it very

heterogeneous species, as Tachina vertiginosa, Meig., with bristles on the facial ridges,

and Tachina confinis, Meig., with hairy eyes, among others having no bristles on the

face and the eyes bare. The genus, however, has since been restricted by Meigen

(System. Beschr. europ. zweifliigl. Ins. vii. p. 178) and Schiner (Fauna austriaca,

Dipt. i. p. 481) to the species having the eyes bare, the facial ridges without bristles,

and the vibrisse inserted just on the oral margin. In this sense it is closely allied to

104

DIPTERA.

Exorista, from which it scarcely differs except in the total absence of pilosity from

the eyes. -

The Central-American collections before me contain numerous species

the genus Masicera as thus restricted.

ll.

12.

138.

14.

15.

. Wings partly blackish . . . «. . . a

. Second and third abdominal segments with discal and mar-

ginal macrochete (subgenus Ceromasia, Rond.) .

Second and third abdominal segments with marginal macro-

chete only. . 2. . 6 ee te et

. Palpi black . . .

Palpi rufous or yellowish oe ee ee ee

. Front ochraceous, the face white .

Front and face cinereous . . . + «© © © «© © © * *8

. Palpiblack .. .

Palpi rufous or yellowish, at least at ‘the tip .

. Anal segment rufous.

Anal segment not rufous

. Small cross-vein on the middle of the discal cell . ..

Small cross-vein before the middle of the discal cell

. Frontal band inconspicuous

Frontal band black and very distinct woe ee

Head red, with silvery-white reflections ; abdomen with irre-

gular black reflecting spots ; larger species (9 millim.) .

Head whitish, not silvery; abdominal segments with black

hind borders; smaller species (4°5 millim.)

Thorax with two broad black bands .

Thorax with four black stripes

Wings greyish-hyaline . . «. ». » «© - = >

Scutellum testaceous, at least at the hind margin

Scutellum grey or black . .. .

Frontal band nearly as broad as the sides of the front ; frontal

bristles on each side in a single row . .

Frontal band much narrower than the sides of the front ;

frontal bristles on each side in double rows or somewhat

irregular. 2. 6. 2 6 es 6 we ew se ee

Anus rufous . ... + + © © © «© © «© @ .

Anus not rufous . . . 6 »« «© « «© « « » .

Posterior cross-vein curved ; stripes of the thorax linear .

Posterior cross-vein straight ; stripes of the thorax broad

Stripes of the thorax thin, linear, and usually obliterated

behind the transverse suture . .°.

Stripes of the thorax distinctly prolonged behind the trans-

verse suture, usually broad and very conspicuous

belonging to

luctuosa, v. d. Wulp.

strigata, v. d. Wulp.

sodalis, v. d. Wulp.

abdominalis, v. d. Wulp.

tantilla, v. d. Wulp.

inquinata, v. d. Wulp.

impedita, v. d. Wulp.

pumila, v. d. Wulp.

10.

ll. ;

picta, v. d. Wulp.

bistrigata, v. d. Wulp.

12.

13.

normula, v. d. Wulp.

fraudulenta, v. d. Wulp.

14.

15.

piliseta, v. d. Wulp.

subpilosa, v. d. Wulp.

16.

18.

MASICERA. 105

16. First and third veins with short bristles . . . . . + . érichoneura, v. d. Wulp.

First and third veins without bristles . . . . - - . . I%.

17, Yellowish-cinereous, with narrow black hind borders to the

abdominal segments . . . . + - + + + + + « « flavescens, v. d. Wulp.

Whitish-grey, with broad black hind borders to the abdominal

segments. . . . + « « » bilineata, v. d. Wulp.

18. Body broadly ovate; second and third abdominal segments

with a black dorsal stripe and two lateral spots . . . . curta, v.d. Wulp.

Body elongate-oval; abdomen with blackish hind borders to

the segments . 2. 2. 2 ee ee ee et eee YD

19. Bristles above the vibrisse reaching higher than the end of |

the antenne ; apical cross-vein straight . . . . . . dgecta, v. d. Wulp.

Only some bristles immediately above the vibrisse . . . . 20. |

20. Hind tibiz outwardly with a row of short bristles . . . . sordida, v. d. Wulp.

Hind tibize outwardly with some long and stout bristles . . calcarata, v. d. Wulp.

1. Masicera luctuosa, sp. n., ¢ 2.

Cinereous ; frontal band, four thoracic stripes, broad hind borders to the abdominal segments, antenne, palpi,

and legs black ; discal and marginal macrochete on the abdomen.

Length 5:°5-7°5 millim. .

Front of the male narrower than the eyes, in the female somewhat broader ; frontal bristles descending on

each side in a single row to beneath the second antennal joint; vibrisse surmounted by some bristles ;

cheeks narrow; beard whitish. Antenne a little shorter than the face; second joint bristly ; third joint

three times as long as the second; arista thickened to the proximal half. Proboscis black, the terminal

lips with long yellow hairs; palpi thickened towards the tip. Thorax and scutellum cinereous ; thoracic

dorsum with four black stripes, which are prolonged behind the transverse suture, but do not fully reach

the hind margin of the thorax. Abdomen conical; first segment black ; the following segments cinereous,

with the posterior half black, the black colour more or less extended as reflections; sometimes a black

dorsal stripe appears; discal and marginal macrochete are present on the second and following segments.

Middle tibiee with some long bristles ; hind tibie outwardly with a row of bristles of unequal length ;

foot-claws and pulvilli elongate in the male, the pulvilli grey with a yellowish margin. Tegule greyish.

Wings hyaline, in some specimens slightly brownish along the costa; small cross-vein on the middle of

the discal cell; curvation of the fourth vein with a blunt angle; apical cross-vein straight; posterior

cross-vein curved.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet, Atoyac in Vera Cruz, Teapa in

Tabasco (H. H. Smith).

« Several specimens.

2. Masicera strigata, sp. n., ¢ 2.

Cinereous ; front ochraceous ; face white; frontal band, four thoracic stripes, hind borders of the abdominal

segments, antenne, proboscis, and legs black; palpi rufous ; discal and marginal macrochate on the

abdomen.

Length 6°5 millim.

Front a little prominent, as broad as the eyes ; frontal band as broad as the lateral portions; frontal bristles

few in number, three of them descending beneath the root of the antenne ; face, posterior orbits of the

eyes, and beard white. Antenne nearly as long as the face; second joint with short bristles ; third

- joint three times as long as the second ; arista thickened to ‘less than half its length. Thorax and scutellum

BIOL. CENTR.-AMER., Dipt., Vol. II., Ifarch 1890. p

106 DIPTERA.

yellowish-cinereous ; thoracic dorsum with four black stripes, which are prolonged behind the transverse

suture. Abdomen elongate; first segment black, nearly as long as the second; this and the following

segments cinereous with the posterior half black, and with discal and marginal macrochewte, the marginal

macrochztz of the third segment longer than the others; anal segment in the female pointed and with

many bristles on the ventral side. Legs with scattered bristles; a rather long bristle on the middle

of the posterior tibie ; foot-claws and pulvilli elongate in the male. Tegule and wings greyish ;- small

cross-vein before the ‘middle of the discal cell; curvation of the fourth vein with a blunt angle; apical

cross-vein nearly straight ; posterior cross-vein ‘slightly curved.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet, Cuernavaca in Morelos,

Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith).

Two male and three female specimens.

3. Masicera sodalis, sp.n., ¢ 2.

Cinereous; frontal band, four thoracic stripes, hind borders of the abdominal segments, antenna, proboscis,

and legs black; palpi rufous; discal and marginal macrochete on the abdomen.

Length 5°5 millim.

Closely allied to the preceding species, but differing in the coloration of the front, which is similar to that of

the face (whitish with grey reflections). The front and the frontal band are narrower than in M. strigata ;

and the wings are more obscure, especially along the costa.

Hab. Mexico, Venta de Zopilote 2800 feet and Amula 6000 feet, both in Guerrero,

Teapa in Tabasco (H. H. Smith).

Two male and four female specimens.

4, Masicera abdominalis, sp. n., ¢.

Dark cinereous ; palpi and anal segment rufous; frontal band, four stripes on the thorax, antenns, and legs

black ; no discal macrochets on the abdomen.

Length 6 millim.

Head yellowish-cinereous ; face perpendicular, not prominent (neither towards the front nor at the oral margin) ;

facial ridges with some weak bristles reaching to nearly half the face; frontal band black, narrow, not

fully prolonged to the vertex. Antenne a little shorter than the face, very slender; third joint nearly

four times as long as the second ; arista thickened to the proximal half. Palpi dark rufous. Thoracic

dorsum with four black stripes—the median stripes linear, the outer ones broader and prolonged behind

the transverse suture. Abdomen ovate ; the first three segments cinereous, with slight blackish reflections ;

sometimes a black dorsal band appears; anal segment yellowish-rufous; the second and third segments

laterally with some reddish coloration ; macrochetze of these segments only at the hind margins, those of

the anal segment less strong. Legs with scattered bristles. Tegule whitish-yellow. Wings greyish ;

small cross-vein a little before the middle of the discal cell ; apical and posterior cross-veins nearly straight.

Hab. Mexico, Temax in North Yucatan (Gauwmer).

A single female specimen.

5. Masicera tantilla, sp.n., ¢.

Cinereous ; frontal band, four thoracic stripes, hind borders of the abdominal segments, antenne, palpi, and legs

black ; small cross-vein on the middle of the discal cell.

Length 5°5 millim.

This species bears a striking resemblance to MU. strigata and M. sodalis, but may easily be distinguished from

MASICERA. | 107

_ either of these by the black palpi and the absence of discal macrochewte on the abdomen. The face and

front are of the same cinereous coloration as the thorax, the front, however, with a slightly yellowish tint ;

the frontal band is narrower than the cinereous lateral portions. The anal segment is not pointed, and on

the ventral side it is less densely beset with bristles. The wings are greyish ; the small cross-vein is on

the middle of the discal cell.

Hab. Mexico, Teapa in Tabasco (H. H. Smith). .

Two female specimens.

6. Masicera inquinata, sp. n., 2.

Cinereous ; four thoracic stripes, reflections on the abdomen, antenne, palpi, and legs black; small cross-vein

before the middle of the discal cell.

Length 8 millim. ,

_ Front much broader than the eyes, yellowish-cinereous, the frontal band scarcely more obscure ; frontal bristles

on each side in a curved row, descending to the number of five beneath the root of the antenne; face

white; vibrissee surmounted by some shorter bristles; beard whitish. Antenne shorter than the face;

_ second joint bristly ; third joint three times as long as the second ; arista thickened to the proximal half.

Thorax and scutellum light cinereous; thoracic dorsum with four black stripes over its whole length, and

posteriorly between the intermediate ones a less distinct blackish stripe, the latter prolonged over the

scutellum; hind border of the scutellum slightly testaceous. Abdomen ovate; first segment black,

distinctly shorter than either of the following segments, which are cinereous with blackish-brown

reflecting spots, chiefly on the hind margins, and a black dorsal stripe; on the hind margin of the second

segment are two dorsal and two lateral macrochete (one on each side); on the hind margin of the

third segment a row of ten macrochete; on the anal segment several macrochete ; ventral surface

blackish, Front tibia outwardly with bristles; middle tibie with a long bristle on the outside and a

shorter one on the inside; hind tibie outwardly fringed, with a longer bristle below the middle.

Tegule whitish. Wings greyish-hyaline; small cross-vein before the middle of the discal cell; curvation

of the fourth vein nearly rectangular; apical cross-vein slightly concave; posterior cross-vein almost

straight.

Hab. Mexico, Cuernavaca in Morelos (H. H. Smith).

A single female specimen.

7. Masicera impedita, sp. n., 2.

Cinereous; head silvery-white; frontal band, four thoracic stripes, first abdominal segment, antenne, palpi,

and legs black.

Length 9 millim.

Front and face cinnamon-red, with a very conspicuous silvery-white reflection ; the front a little broader than

the eyes; frontal band narrower than the silvery-white lateral portions ; frontal bristles on each side in

a curved row, descending to the number of three beneath the root of the antenne ; vibriss# surmounted

by some shorter bristles. Antenne nearly as long as the face; second joint bristly ; third joint four or

five times as long as the second; arista thickened to the proximal half. Proboscis black, with the

terminal lips rufous ; palpi black, cylindrical. Thorax light cinereous ; thoracic dorsum with brownish

reflections and four black stripes, the outer stripes interrupted at the transverse suture and none of them

reaching the posterior margin ; scutellum cinereous. Abdomen ovate; first segment black, shorter than

either of the following segments, which are light cinereous, with irregular brownish reflecting spots; on

the hind margins of the first and second segments two dorsal macrochete, on those of the third and fourth

segments a row of macrochets, all the macrochetz inserted at a little distance from the margins; ventral

surface blackish. Bristles of the legs nearly as in the preceding species; the bristles on the outside of the

front tibice shorter, those of the hind tibie less fringe-like. Tegule and wings as in WM, inquinata; the

108 DIPTERA.

third vein from its origin to the small cross-vein with a row of short bristles (in M. inquinata there are

only some small bristles at the base of that vein, as in almost all Tachinine).

Hab. Mexico, Cuernavaca (H. H. Smith).

Two female specimens.

8. Masicera pumila, sp. n., 2.

Cinereous ; frontal band, four thoracic lines, hind borders of the abdominal segm nents, antenne, palpi, and legs

black.

Length 4°5 millim.

Head broader than the thorax ; front cinereous, broader than the eyes; frontal band narrower than the cine-

reous lateral portions ; frontal bristles rather weak, somewhat irregular, three of them descending beneath

the root of the antenne, the bristles on the vertex much stouter ; face and cheeks whitish ; above the

vibrisse several shorter bristles, mounting to nearly half the face. Antenna a little shorter than the face ;

second joint with a short bristle ; third joint three times as long as the second ; arista thickened to the

proximal half and then suddenly becoming as fine as a hair. Proboscis and palpi black. Thorax and

scutellum cinereous; thoracic dorsum with four black lines—the outer lines interrupted at the transverse

suture, the intermediate ones obsolete behind. Abdomen ovate; first segment black; the following

segments cinereous with the posterior half shining black, sometimes appearing blackish with narrow white

front borders ; macrochetze on the hind margins of the segments only. Middle tibize with some long

bristles; hind tibiee outwardly with a row of short bristles and a longer one below the middle. Tegule

whitish. Wings nearly hyaline; small cross-vein distinctly before the middle of the discal cell; apical

cell narrowly opened ; apical cross-vein very slightly concave; posterior cross-vein straight.

Hab. Mexico, Amula 6000 feet in Guerrero (7. H. Smith).

A single female specimen.

9. Masicera picta, sp.n., ¢ 9. (Tab. III. figg. 13; 13a, head in profile.)

Ochraceous ; frontal band, four stripes on the thorax (two and two united), four transverse bands on the

abdomen, antennz, and legs black; palpi rufous; base and costa of the wings blackish (3) or

black (¢@ ).

Length 5-5°5 millim.

Front ochraceous, as broad as the eyes; frontal band narrower than the ochraceous lateral portions ; frontal

bristles descending on each side in a curved row to beneath the second antennal joint; face yellowish-

white; vibrisse surmounted by three shorter bristles. Antenne nearly as long as the face; second joint

bristly ; third joint five ( 2) or six (¢) times as long as the second; arista thickened to the proximal

half. Proboscis black; palpi rufous, thickened and with a whitish reflection towards the tip. Thoracic

dorsum ochraceous, with four black stripes, which do not reach the hind margin and are more or less

united two and two, so that they usually resemble two black bands; scutellum black, its hind margin

sometimes rufous; pleure grey. Abdomen ovate, ochraceous; the first segment and broad bands on the

hind margins of the following segments black; second and third segments with marginal macrochete ;

anal segment with several irregular macrochate ; ventral surface similarly marked, but with the ochra-

ceous portions whitish-grey. Legs with scattered bristles; foot-claws and pulvilli of the anterior tarsi

elongate in the male, the pulvilli greyish. Tegule whitish, Wings grey; the dark coloration at the

base and costa extending over the proximal half of the discal cell—in the male it is faintly blackish, in

the female intense black and prolonged to the end of the second vein; small cross-vein on the middle

of the discal cell; curvation of the fourth vein rectangular; apical cross-vein slightly concave ; posterior

cross-vein nearly straight.

Hab. Mexico, Santiago Iscuintla in Jalisco (Schumann), Xucumanatlan 7000 feet

and Omilteme 8000 feet in Guerrero, Vera Cruz, Teapa in Tabasco (H. H. Smith).

MASICERA. 109

Two. male and four female specimens. | |

This species is distinguished from all its congeners by.the black base and costa of

the wings, the black markings being still more intense in the female.

10. Masicera bistrigata, sp. n., °.

Yellowish-cinereous ; frontal band, two broad stripes on the thorax, hind margins of the abdominal segments,

antenne, and legs black; palpi and terminal lips of the proboscis rufous. —

Length 6°5 millim. oe

Front yellowish, as broad as the eyes, not narrowed behind ; frontal band as broad as the yellowish lateral

portions ; frontal bristles descending on each side in a single row to the second antennal joint ; face

silvery-white, slightly retracted ; oral margin not prominent ; vibrisse surmounted by some short bristles;

eyes large, occupying the whole lateral part of the head. Antenne as long as the face; second joint

with a longer and some very short bristles ; third joint six times as long as the second; arista thickened

to the proximal half. Proboscis black, with the terminal lips pale rufous; palpi obscure at the base,

distinctly thickened and pale rufous towards the tip. Thoracic dorsum yellowish-cinereous, almost ochra-

ceous, with two broad black stripes, which almost reach the hind margin; scutellum yellowish-cinereous,

with blackish reflections; pleure grey, with black reflections. Abdomen ovate, convex, yellowish-grey ;

first segment, the hind margins of the following segments (to one third of their length), and an indistinct

dorsal stripe, black; sometimes the whole surface is blackish, except a narrow front border to the

segments ; the first and second segments have only lateral macrochete, the third has a row of about eight

marginal macrocheete, and there are some others round the anus; ventral surface dark greyish. Front

tibia with some short bristles; middle tibiee outwardly with a long bristle; hind tibie outwardly with

several bristles of unequal length. Tegule whitish. Wings greyish-hyaline ; third vein with short

bristles from the base to the small cross-vein, which is inserted a little before the middle of the discal

cell; curvation of the fourth vein with a blunt angle ; apical cross-vein nearly straight; posterior cross-

vein very slightly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

11. Masicera normula, sp.n., ¢ 2.

Cinereous; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne, and legs black; palpi

rufous; scutellum testaceous, at least towards the hind margin ; frontal bristles on each side in a

single row.

Length 7-9 millim.

Front cinereous, as broad as the eyes, in the female a little broader; frontal band as broad as the lateral

portions ; frontal bristles descending on each side in a single row beneath the root of the antennz; face

whitish ; vibrissee surmounted by several shorter bristles. Antennz nearly as long as the face; second

joint with short bristles ; third joint three or four times as long as the second ; arista thickened to

the proximal half. Proboscis black ; palpi dark rufous, in some specimens black with a rufous tip.

Thorax whitish-cinereous, with four black stripes, these being most conspicuous before the transverse

suture; scutellum cinereous, with the hind margin testaceous, sometimes wholly of the latter. colour.

Abdomen ovate, cinereous, with blackish reflecting spots and an indistinct black dorsal stripe ; the first

segment wholly black, shorter than the second; the front margins of the second and following segments

whitish ; a pair of macrochete on the hind margin of the first and second segments, a row of macro-

checte on the hind margin of the third segment, and several macrochetze on the anal segment; ventral

surface blackish. Front tibiee outwardly with short bristles ; middle tibia with some long bristles;

hind tibie outwardly with a row of bristles of unequal length ; foot-claws and pulvilli elongate in the

male, the pulvilli yellowish. Tegule whitish. Wings greyish-hyaline ; a dilute brown streak between

the first and second veins; small cross-vein before the middle of the discal cell; curvation of the fourth

vein rectanglar ; apical cross-vein a little concave ; posterior cross-vein slightly curved.

110 DIPTERA.

Hab. Mexico, Chilpancingo 4600 feet, and Amula 6000 feet, both in Guerrero,

Atoyac in Vera Cruz (H. H. Smith), Orizaba (coll. Bellardt). |

Several male and three female specimens, including one of the latter sex from Orizaba

in the collection of Prof. Bellardi.

12. Masicera fraudulenta, sp.n., 3 2.

Cinereous ; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenna, and legs black ;

palpi rufous; scutellum testaceous towards the hind margin; frontal bristles on each side in double,

somewhat irregular rows.

Length 9°5 millim.

Closely allied to the preceding species, but differing from it in the width of the frontal band (this being

distinctly narrower than the cinereous lateral portions) and in the frontal bristles being inserted on each

side in double, somewhat irregular rows. The intermediate stripes on the thorax are less broad and the

outer ones less conspicuous ; the dark reflections on the abdomen have a browner or testaceous tint ; and

the bristles on the outside of the hind tibie are more fringe-like.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet, Atoyac in Vera Cruz (H. #.

Smith).

A female specimen from the former, a male from the latter locality.

13. Masicera piliseta, sp. n. °.

Whitish-grey ; frontal band, two lines on the thorax, and legs black; antennz and palpi rufous: arista

pubescent ; abdomen shining rufous, with black reflections, the front borders of the segments whitish.

Length 6 millim.

Front as broad as the eyes; frontal band narrow, black, anteriorly somewhat rufous; frontal bristles scarcely

descending beneath the root of the antennw; face perpendicular, laterally silvery-white ; oral margin not

prominent. Antenne nearly as long as the face, rufous; third joint (except its base) brownish, four

times as long as the second; arista tapering towards the tip, over its whole length with short hairs.

Thoracic dorsum with two black lines before the transverse suture and exterior to these lines some black

reflecting spots (instead of the usual lateral stripes) ; pleura cinereous; base of the scutellum black.

Abdomen oblong-ovate, very shining, reddish-brown, the first three segments with black reflections,

especially in the middle on the hind borders; anal segment rufous; second and following segments with

greyish-white front borders ; macrochete strong but not numerous; no discal macrochete on the second

and third segments. Legs black, the femora and tibie of the front pair piceous. Tegule whitish.

Wings grey; small cross-vein perpendicular, a little before the middle of the discal cell; third vein

slightly curved downwards before its end (the opening of the apical cell is thus at a short distance from

the wing’s tip); curvation of the fourth vein somewhat rounded, not far from the wing’s margin ; apical

cross-vein slightly concave ; posterior cross-vein distinctly curved.

Hab. Mexico, Temax in North Yucatan (Gaumer).

A single female specimen.

14, Masicera subpilosa, sp. n., ¢.

Grey ; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne, and legs black; anal

segment and palpi rufous; arista pubescent.

Length 6°5 millim.

Of a slender form. Head greyish-white ; front slightly narrowed behind and there as broad as the eyes;

frontal band much narrower than the greyish lateral portions, the latter with cinereous reflections ;

frontal bristles descending on each side in a single row as far as the end of the second antennal joint;

MASICERA. 111

face a little retracted; above the vibrisse some shorter bristles, two or three of which are inserted

much higher up on the facial ridges. Eyes not quite reaching the inferior part of the head. Antenne

distinctly shorter than the face ; third joint three or four times as long as the second; arista thickened

to the proximal half and with a short pile on the upper part. Proboscis and palpi rufous, the palpi

cylindrical and with a whitish reflection. Thorax whitish-grey, with four black stripes, which are very

distinct before the transverse suture, but less defined behind it; scutellum grey. Abdomen conical ;

first segment black ; second and third segments grey, with irregular black reflecting spots; anal segment

rufous, with a greyish front border; on the hind margins of the second and third segments are strong

macrochete ; on the anal segment the macrochete form a double row; ventral surface (except the anal

segment) blackish, with white reflections. Front and hind tibie with short, the middle tibie with some

longer bristles. Tegula whitish. Wings brownish-grey, slightly infuscated along the costa, and with a

short costal spine ; small cross-vein a little before the middle of the discal cell; curvation of the fourth

vein nearly rectangular and with a vestige of a short appendage; apical cross-vein concave ; posterior

cross-vein slightly curved.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

This species differs from the others of the genus in the pubescent arista, the costal

spine, and the appendage at the curvation of the fourth vein. In having bristles on

the facial ridges, it shows some affinity with Prospherysa, these bristles, however,

being few in number and not forming a row, the species seems to be better placed in

Masicera.

15. Masicera trichoneura, sp. n., 2.

Cinereous ; antennew, hind borders of the abdominal segments, and legs black; palpi rufous ; first and third

veins of the wings bristly.

Length 8 millim.

Head white, a little broader than the thorax; front twice as broad as the eyes; frontal band as broad as the

white lateral portions, blackish, but sometimes inconspicuous in a whitish reflection ; just above the antennz

a white point, surrounded by a blackish ring ; frontal bristles stout, but few in number, and inserted on

black points, two or three of them beneath the root of the antennw; above the vibrisse some short

bristles; beard white. Antenne a little shorter than the face ; second joint with a bristle; third joint

three times as long as the second, truncate at the tip; arista long, thickened to the proximal half.

Proboscis black, with the terminal lips pale rufous; palpi pale rufous, slender. Thorax and scutellum

cinereous; thoracic dorsum with four black lines—the intermediate lines only conspicuous before the

transverse suture, the outer ones interrupted and somewhat obsolete. Abdomen conical ; first segment

black ; the following segments grey, with their posterior half shining black; macrochzte robust, at the

hind margins of the second and following segments; anus truncate and surrounded by many bristles,

All the tibie with rather long bristles. Tegule whitish. Wings nearly hyaline; first vein with short

bristles over its whole length ; third vein bristly to beyond the small cross-vein, the latter resting on the

middle of the discal cell; apical cross-vein concave; posterior cross-vein straight.

Hab. Mexico, Xucumanatlan 7000 feet in Guerrero (H. H. Simith).

A single female specimen.

In the bristly veins and other characters this species has some affinity with the genus

Plagia; but, owing to the less oblique position of the exterior cross-veins, it is better

placed 4 in the genus Masicera.

112 DIPTERA.

16. Masicera flavescens, sp. n., ?.

Yellowish-cinereous ; frontal band, four lines on the thorax, narrow hind borders to the abdominal segments,

antenne, and legs black ; palpi yellow.

Length 5°5 millim. .

Front a little broader than the eyes, not narrowed behind; frontal band narrower than the yellowish lateral

portions, not reaching the vertex; frontal bristles descending on each side in a single row beyond the

second antennal joint; face slightly retracted, with white reflections ; vibrissa accompanied by some

other bristles. Antenne distinctly shorter than the face; second joint bristly; third joint three times

as long as the second; arista thickened to the proximal half, the thickened part with some pubescence

(which, however, is only visible under a strong lens). Proboscis black; palpi yellow, cylindrical.

Thoracic dorsum and scutellum yellowish-cinereous ; four black lines are conspicuous before the trans-

verse suture, but obliterated behind it; pleure grey, with the grooves black. Abdomen ovate; first

segment black; the following segments yellowish-cinereous, with blackish reflections and narrow black

hind borders; macrochete on the hind margins of the second and third segments and several on the anal

segment ; ventral surface black, with whitish reflections. Hind tibia outwardly with bristles of unequal

length. Tegule whitish. Wings grey ; small cross-vein on the middle of the discal cell ; curvation of

the fourth vein with a somewhat rounded angle; apical cross-vein nearly straight ; posterior cross-vein

slightly curved.

Hab. Mexico, Cuernavaca (H. H. Smith).

A single female specimen.

17. Masicera bilineata, sp. n., 2.

Whitish-grey ; frontal band, antennz, two lines on the thorax, broad hind borders to the abdominal segments,

and legs black; palpi pale rufous.

Length 6°5 millim.

Head with silvery-white reflections ; frontal band nearly as broad as the whitish lateral portions; frontal

bristles descending to the number of three beneath the root of the antenne ; face a little retracted, but

not prominent at the oral margin. Antenne nearly as long as the face; third joint four times as long as

the second; arista thickened to its proximal third. Thoracic dorsum with black stripes, the two median

stripes linear and more conspicuous than the others; base of the scutellum black. Abdomen subconical,

shining black; the front borders of the second and following segments with white reflections; first

segment shorter than the second; macrochete strong but not numerous, on the second and third

segments only at the hind margins. Legs with scattered bristles. Tegule white. Wings greyish; small

cross-vein perpendicular, a little before the middle of the discal cell; curvation of the fourth vein with

a blunt angle; apical and posterior cross-veins nearly straight, the latter midway, or nearly so, between

the-small cross-vein and the curvation of the fourth vein.

Hab. Mexico, Temax in North Yucatan (Gaumer).

A single female specimen.

18. Masicera curta, sp.n., ¢ 2.

Cinereous ; frontal band, four stripes on the thorax, three stripes on the abdomen, antenne, and legs black ;

palpi rufous, | |

Length 7 millim.

Of a short form. Head yellowish-white; front of the male narrowed behind, nearly as broad as the eyes, in

the female a little broader; frontal band narrower than the yellowish-white lateral portions; frontal

bristles in the male numerous and descending on each side in a double row, or somewhat irregularly,

beneath the root of the antenne-—in the female they are more robust and fewer in number; cheeks

broad ; vibrissee accompanied by several other bristles. Antenne distinctly shorter than the face; second

joint bristly and with white reflections; third joint three times as long as the second; arista a little

MASICERA. 113

thickened on the proximal half. Thorax grey, with four distinct black stripes, which are prolonged

behind the transverse suture, the outer stripes extending to the hind margin ; scutellum cinereous, with

blackish reflections. Abdomen short-ovate ; first segment black ; second and third segments cinereous,

with a black dorsal stripe and two oblong black reflecting spots; anal segment cinereous, at the sides

faintly yellowish, without black markings, in the male densely beset with black pile and bristles; macro-

cheetse only on the hind margins of the second and third segments. Tibia of the front and hind legs

with a row of short bristles ; middle tibie with some longer bristles. Tegule whitish. Wings greyish-

hyaline ; small cross-vein distinctly before the middle of the discal cell ; apical and posterior cross-veins

oblique and nearly straight.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A male and a female specimen.

19. Masicera dejecta, sp. n., °.

Cinereous ; head yellowish ; frontal band, four thoracic stripes, reflections on the abdomen, antenna, and legs

black; palpi rufous; hind tibie with a row of bristles; apical cross-vein straight.

Length 6°5 millim.

Allied to the following species, M. sordida and M. calcarata, but differing from them in the apical cross-vein

being straight, not concave. Head pale ochraceous; the front not narrowed behind, nearly as broad as

the eyes; the frontal band as broad as the pale ochraceous lateral portions ; above the vibrissee is a row of

shorter bristles, reaching to nearly half the face. Antenne shorter than the face, their third joint four

times as long as the second; the arista thickened in its proximal third. Proboscis black. Thorax and

scutellum yellowish-cinereous; thoracic dorsum with four black stripes of nearly equal breadth, these

being prolonged behind the transverse suture. Abdomen elongate-oval, truncate at the anus ; first segment

black ; the following segments cinereous, with black hind borders, blackish reflecting spots, and a black

dorsal stripe, and with macrochete on the hind margins. Front tibie with short bristles; middle

tibie with some long bristles ; hind tibiee outwardly with a row of short bristles and a longer one below

the middle. Tegule whitish. Wings nearly hyaline; small cross-vein before the middle of the discal cell ;

apical cross-vein oblique and straight (the curvation of the fourth vein forming a blunt angle); posterior

cross-vein slightly curved.

Hab. Mexico, Amula in Guerrero 6000 feet (7. H. Smith).

A single female specimen.

20. Masicera sordida, sp. n., 2.

Cinereous; head silvery-white ; frontal band, four thoracic stripes, hind borders of the abdominal segments,

antenne, and legs black; palpi and terminal lips of the proboscis rufous; hind tibie with a row of

bristles.

Length 7-8 millim.

Face perpendicular; front not narrowed behind, nearly as broad as the eyes; frontal band a little narrower

than the silvery-white lateral portions ; frontal bristles descending on each side to the number of three

beneath the root of the antennz ; cheeks narrow ; vibrissee surmounted by some shorter bristles. Antenne

a little shorter than the face; second joint bristly; third joint four times as long as the second; arista

thickened in its proximal half. Thorax cinereous, with four black stripes (the intermediate stripes

linear, the outer ones broader)—two and two united behind the suture, but not reaching the posterior

margin ; scutellum cinereous, with a black reflecting spot on the disc. Abdomen ovate, truncated at the

tip ; first segment black ; the following segments cinereous, with blackish reflections and shining black

hind borders, and sometimes with a black dorsal stripe; macrochete only on the hind margins of the

segments. The middle tibie have some long bristles, the fore and hind tibie a row of short bristles

on their outer edge. Tegule white. Wings with a brownish-grey tint; small cross-vein distinctly

before the middle of the discal cell; apical and posterior cross-veins slightly curved.

BIOL. CENTR.-AMER., Dipt., Vol. I1., May 1890. qg

114 DIPTERA.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet, Atoyac in Vera Cruz, Teapa

in Tabasco (H. H. Smith).

Several female specimens.

21. Masicera calcarata, sp. n., °.

Cinereous ; face silvery-white; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne,

and legs black; palpi and terminal lips of the proboscis rufous; hind tibie with some long and stout

bristles. ,

Length 9 millim.

Allied to M. sordida. The face more retracted, the front somewhat broader and with a yellowish or ochra~-

ceous tint ; the antennz much longer, and nearly reaching the oral margin, their third joint six times as

long as the second; the stripes of the thorax not united behind the transverse suture; the abdomen more

conical, and cinereous with blackish reflections; the hind tibize outwardly with some long and robust

bristles.

Hab. Muxico, Cuernavaca (Hl. H. Smith).

A single female specimen.

The following species, all from Mexico, are included by their authors in the genus

Masicera or Ceromasia :—

Masicera disputans, Walker, Trans. Ent, Soc. Lond. new. ser. v. p. 302.

gentica, Walker, 1. c. p. 302.

necopina, Walker, 1. c. p. 303.

—— expergita, Walker, l. c. p. 304.

Jlavifacies, Bigot, Ann. Soc. Ent. Fr. 1888, p. 263. no. 51.

Ceromasia quadrivittata, Bigot, 1. c. p. 261. no. 39.

zonata, Bigot, |. c. no. 40.

pictigaster, Bigot, 1. c. no. 41.

castanifrons, Bigot, l. c. no. 42.

— chrysocephala, Bigot, 1. c. no. 43.

spinipes, Bigot, l. c. p. 262. no. 44.

abbreviata, Bigot, 1. c. no. 45.

Without an examination of the types it is impossible to say whether these species

are different or not from those described here; the descriptions or diagnoses of both

authors are too incomplete for the purposes of identification.

METOPIA.

Metopia, Meigen, in Illiger’s Magaz. ii. p. 280 (1803).

This genus may easily be recognized by the prominent conical front, the very long

antenne, the bristles on the facial ridges, and the prolongation of the fourth vein at its

point of curvation. 7

One species from Central America must be included in it.

METOPIA.—BAUMHAUERIA. 115

1. Metopia perpendicularis, sp. n.,2. (Tab. III. figg. 18, head in profile;

18 a, wing.)

Greyish; face and sides of the front white; frontal band, four thoracic stripes, hind borders of the abdominal

segments, antenn®, palpi, and legs black ; posterior cross-vein nearly perpendicular.

Length 5:5 millim.

Front in profile conical, broader than the eyes; frontal band blackish, much broader than the lateral portions ,

frontal bristles descending scarcely beneath the root of the antenne ; face retracted; bristles of the facial

ridges mounting as far as the second antennal joint. Antenne as long as the face; second joint short; the

third joint at least six times as long asthe second. Thorax grey, with four narrow black stripes, the outer

stripes prolonged behind the transverse suture ; scutellum cinereous. Abdomen ovate; grey, with blackish

reflections and black hind borders to the segments, sometimes blackish, with white reflecting spots,

especially at the sides ; macrochste only on the hind margins of the segments. Hind tibie with several

rather long bristles. Teguls whitish. Wings greyish-hyaline ; small cross-vein a little before the middle

of the discal cell; curvation of the fourth vein forming a right angle and with a distinct appendage; apical

cross-vein oblique, concave ; posterior cross-vein straight, nearly perpendicular, inserted somewhat beyond

the middle between the small cross-vein and the curvation of the fourth vein.

Hab. Mexico, Amula in Guerrero 6000 feet, Cuernavaca in Morelos (H. H. Smith).

A female specimen from each locality.

BAUMHAUERIA.

Baumhaueria, Meigen, System. Beschr. europ. zweifliigl. Ins. vii. p. 251. 29 (1838).

This genus is characterized by the bare and proportionately small eyes, the broad

and prominent front, the long antenne with the arista thickened to near the tip, and

the bristles on the facial ridges. In the collections before me there is a specimen

agreeing in most of its characters with the European forms (B. gonieformis and B. ver-

tiginosa), but it has the eyes larger, and descending much lower on the lateral part of

the head, and the third antennal joint proportionately shorter; these differences, how-

ever, are not of sufficient importance to justify the formation of a new genus.

‘No species of Bawmhaueria has hitherto been recorded from Central America; but

one from Wisconsin, North America, B. analis, has. been described by me in ‘ Tijdschrift

voor Entomologie,’ x. p. 148.

1. Baumhaueria discrepans, sp.n.,¢. (Tab. III. fig. 17, wing.) |

Cinereous; thorax with obsolete dark stripes; abdomen with blackish reflections; antenne and legs black, the

basal joints of the former and the palpi rufous.

Length 6 millim.

Head white, with grey reflections; front with a somewhat yellowish tint, distinctly broader than the eyes

(less prominent than in the European species) ; frontal band narrower than the lateral portions; frontal

bristles on each side descending (somewhat in a double row) as far as the end of the second antennal

joint; face nearly perpendicular ; bristles along the facial ridges over their whole length; eyes descending

to the vibrisse. Antenne a little shorter than the face; the basal joints rufous; the third joint black,

four times as long as the second; arista short, thickened to near the tip, its penultimate joint rather

distinct. Proboscis black; palpi small, cylindrical, pale rufous. Thorax and scutellum cinereous ;

thoracic dorsum with four indistinct blackish stripes. Abdomen conical ; first segment short, black; the

following segments cinereous, with blackish reflections, white front borders, and black hind margins; on

116 DIPTERA.

the hind margin of the second segment a pair of macrochets, on that of the third and fourth segments a

row of macrochete ; ventral surface black. Legs black; front femora with two rows of regularly placed

bristles ; the middle and hind femora with some bristles ; front tibia outwardly with short bristles ; some

long bristles on the outside of the middle tibiz and one on the inner side; hind tibie outwardly with a row

of short bristles and with one longer bristle; foot-claws and pulvilli short. Tegule whitish. Wings ©

greyish-hyaline; small cross-vein on the middle of the discal cell; curvation of the fourth vein rect-

angular; apical cell trigonal, the apical cross-vein nearly perpendicular and straight ; posterior cross-vein

very slightly convex, a little beyond the middle between the small cross-vein and the curvation of

the fourth vein.

Hab. Mexico, Cuernavaca (H. H. Smith).

A single female specimen.

PROSPHERYSA*%, gen. nov.

Head at least as broad as the thorax; front usually a little prominent; face retracted; facial ridges with a

row of bristles ; vibrissee inserted at the oral margin or at a little distance above it; eyes bare. Antenns

as long, or nearly as long, as the face; third joint at least three times as long as the second; arista bare,

in some species slightly pubescent. Proboscis prominent; palpi cylindrical. Abdomen conical or oval;

basal segment usually shorter than the following one; second and third segments with marginal, some-

times also with discal, macrochetz; male genitals more or less conspicuous. Legs bristly. Wings.

sometimes with a costal spine ; curvation of the fourth vein angular, without appendage, in some species

faintly prolonged by a fold in the wing’s surface; apical cell opened at some distance before the tip of

the wings.

This genus is allied to Phorocera, but differs from it in the eyes being bare.

The following species belong to it :—

1. Second and third abdominal segments, or at least the third,

with discal and marginal macrochete . . .... . 2.

Second and third abdominal segments with marginal macro-

chete only. 2. 2. 2 1 ww ew ee eee ee

2. Arista pubescent; wings with a costal spine; apical cell

concave . 6 ee ew we ee we ew ee ee. mutans, v. d. Wulp.

Arista bare; wings without a costal spine 3 apical cross-vein

nearly or quite straight. . . . : . 3.

3. Anal segment ochraceous; arista thickened to beyond the

middle . . .... . soe 8 ee ee ew 6 Ochricauda, v. d. Wulp.

Anal segment otherwise coloured ; arista thickened at most

to the proximal half . re

4. Posterior cross-vein straight. . . . . .... . . «5,

Posterior cross-vein distinctly curved . . . oe 6.

5. Abdomen shining black, with whitish front borders to the

segments . . . . se 2 2 2 2. trifasciata, v. d. Wulp.

Abdomen grey, with blackish reflections coe ee ew. ingloria, v. d. Wulp.

6. Anusrufous . . . . 1. 1 1 ee ee ee wk comosa, v. d. Wulp.

Anus shining black. . . . . . . ww eet contigua, v. d. Wulp.

* xpoopepys (standing near).

10.

11.

12.

13.

14.

16.

17.

1. Prospherysa zemulans, sp. n., 3 2.

PROSPHERYSA.

. Cheeks with a row of bristles near the eyes, or at least with

some hairs . . an .

Cheeks without bristles or hairs near the eyes .

. The bristles on the cheeks as long and stout as the frontal

and facial bristles . . . . oo

The bristles on the cheeks weaker and shorter ‘than the

frontal and facial bristles, or reduced to some hairs . .

. Hind tibize outwardly fringed with short bristles, and with

a longer bristle below the middle . . . . . 5s +

Hind tibize with several bristles of unequal length. . . ,

Head yellowish, with brown reflections . . . .. =. .

Head white ... . rr rr

Elongate species (first abdominal segment as long as the

second) . . ... - oe os 8 8

Ovate species (first abdominal segment nsually shorter than

the following segment) . . . .. . a er

Apical and posterior cross-veins in the usual oblique direction

Apical and posterior cross-veins, or at least the latter, very

oblique . 2. 1 6 ee ee ee eee

Anal segment yellowish-rufous . . . 2. . . « -

Anal segment grey or blackish

Apical and posterior cross-veins straight. . . . . -

Apical cross-vein concave, the posterior slightly curved or

stripe

. Frontal band very narrow, nearly linear .

Frontal band as broad as the lateral portions, or ‘but little

narrower. . - oe ew

Base of the antennz and frontal band rufous . ..- +

Antenne and frontal band black ee

Posterior cross-vein in the same oblique direction as the

apical cross-vein re

Posterior cross-vein wore oblique than the apical cross-vein.

14; 14a, head in profile.)

Cinereous ; frontal band, four thoracic stripes, antenne, and legs black; abdomen with blackish reflections, the

anus rufous; wings with a costal spine, brownish on the costa and along the veins.

Length 6-5-9 millim.

Front as broad as the eyes, a little narrowed behind in the male; frontal band as broad as the lateral portions ;

frontal bristles on each side in a single curved row, descending as far as the end of the second antennal

joint ; face slightly retracted, the facial ridges with stout bristles.

second joint with a longer and several very short bristles ;

117

11.

crebra, v. d. Wulp.

rufifrons, v. d. Wulp.

10.

vilis, v. d. Wulp.

albifacies, v. d. Wulp.

macilenta, v. d. Wulp.

12.

13.

16.

apicalis, v. d. Wulp.

14.

rectinervis, v. d. Wulp.

15.

minuta, v. d. Wulp.

serotina, v. d. Wulp.

parvipalpis, v. d. Wulp.

17.

balteata, v. d. Wulp.

plagioides, v. d. Wulp.

(Phospherysa emulans, Tab. III. figg.

Antenne reaching to the vibrisse ;

third joint five or six times as long as the

second; arista pubescent, thickened to nearly half its length. Proboscis black, with the terminal lips

more or less rufous; palpi black or dark rufous.

dorsum with four black stripes, which are prolonged to near the posterior margin.

Thorax and scutellum greyish-cinereous; thoracic

Abdomen conical ;

first segment black; the following segments irregularly variegated with black and grey reflections ; apical

118 DIPTERA.

half of the anal segment rufous; macrochet long, on the disc as well as on the hind margins of the

segments; male genitals with a pair of small projections. Legs rather robust; front femora with a row

of bristles on the underside and a second row posteriorly ; middle and hind femora with some bristles on

the underside; front tibie: with short bristles; middle tibiz with three or four long bristles; hind tibie

outwardly with several bristles of unequal length; foot-claws and pulvilli elongate in the male, the

pulvilli yellowish ; in the female the third and following joints of the front tarsi slightly dilated. Tegule

whitish. Wings with a short costal spine, dilute brown on the costa and along the veins; small cross-

vein nearly on the middle of the discal cell; curvation of the fourth vein rectangular and shortly

appendiculated ; apical cross-vein concave; posterior cross-vein nearly straight.

Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith).

Two male and two female specimens.

2. Prospherysa ochricauda, sp. n., 2.

Cinereous ; four thoracic stripes, reflections on the abdomen, antenne, and legs black ; anal segment ochraceous ;

palpi rufous; arista thickened to beyond the middle.

Length 10°5 millim. .

Front slightly prominent, broader than the eyes; frontal band broad, blackish, but not very conspicuous owing

to the blackish reflections on the sides of the front; frontal bristles proportionately short, on each side in

a double row, somewhat irregularly descending as far as the end of the second antennal joint; face and

cheeks whitish, the cheeks broad and with weak hairs; vibrisse inserted a little above the oral margin ;

bristles on the facial ridges short. Antenne descending to near the vibriss#; basal joints short, dark |

rufous; third joint black, five times as long as the second; arista thickened to beyond the middle, the

penultimate joint somewhat distinct. Proboscis black; palpi pale rufous, cylindrical, slightly curved

upwards. Thorax cinereous, with four black stripes of equal width ; scutellum testaceous, but covered by a

cinereous tomentum. Abdomen ovate; the first two segments cinereous, with irregular black reflecting

spots; the third segment yellowish-cinereous, with similar spots; anal segment ochraceous; all the

segments with long marginal, the second and following segments also with shorter discal, macrochete ;

ventral surface grey, with a black median stripe. Front tibiae with short bristles; middle tibiee with several

long bristles; hind tibize outwardly fringed with short bristles and with a longer bristle below the middle.

Tegule whitish. Wings greyish-hyaline; small cross-vein nearly on the middle of the discal cell; apical

cross-vein curved at the base, and for the rest straight; posterior cross-vein slightly curved.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Sinith).

A single female specimen.

3. Prospherysa trifasciata, sp. n., 2.

‘Blackish ; thorax whitish-grey, with interrupted black lines; abdomen shining black, with whitish front

borders to the segments ; antenna, palpi, and legs black.

Length 7°5 millim.

Front as broad as the eyes, cinereous, with blackish reflections; frontal band as broad as the lateral portions ;

frontal bristles rather stout, on each side in a single row; face and cheeks yellowish-white, but sometimes

with blackish reflections, and appearing very obscure; cheeks narrow; bristles on the facial ridges long,

but diminishing in length upwards. Antenne shorter than the face; second joint bristly ; third joint four

times as long as the second; arista thickened in its proximal half. Proboscis and palpi black. Thorax

with a whitish-grey tomentum; thoracic dorsum with four black stripes—the intermediate stripes linear,

the outer ones interrupted at the transverse suture; scutellum grey, blackish at the base. Abdomen

elongate oval; first segment black; the following segments shining black, with the front borders (for more

than half the length of the segments) greyish-white; all the segments with marginal, the second and

following also with discal, macrochetz ; ventral surface shining black. Hind tibize with several bristles of

unequal length. Tegule yellowish-white. Wings greyish ; small cross-vein nearly on the middle of the

PROSPHERYSA. 119

discal cell; apical cell ending at a short distance before the wing’s tip; third vein slightly bent upwards

before its end; fourth vein with a blunt angle; apical and posterior cross-veins nearly straight.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single female specimen.

4. Prospherysa ingloria, sp. n.,¢.

Grey ; thoracic stripes, reflections on the abdomen, antennz, and legs black; palpi rufous; arista thickened

at the base.

Length 7:5 millim.

Front broader than the eyes, greyish; frontal band blackish, with grey reflections ; frontal bristles rather

short, on each side in a single row, descending as far as the end of the second antennal joint; face and

cheeks whitish, with blackish reflections; bristles of the facial ridges stout ; vibrisse inserted quite at the

oral margin. Antenne as long as the face; basal joints very short; third joint seven or eight times as

long as the second; arista thickened only at the base. Proboscis black; its terminal lips and the palpi

rufous. Thorax and scutellum grey; thoracic dorsum with four black stripes—the intermediate stripes

more distinct before the transverse suture, the outer ones interrupted; base of the scutellum blackish.

Abdomen ovate, grey, with irregular blackish reflections and with black hind borders to the segments ;

discal and marginal macrochete present, all of the same length. Legs black ; the underside of the

posterior femora somewhat rufous towards the tip; front tibize with a row of short bristles; middle tibie

with some long bristles; hind tibie outwardly with a row of short bristles and with a longer bristle

below the middle. Tegule whitish. Wings greyish-hyaline; small cross-vein before the middle of the

discal cell; apical cell ending ata short distance before the wing’s tip; apical and posterior cross-veins

straight.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single female specimen.

5. Prospherysa comosa, sp. n., 3.

Cinereous; frontal band, four thoracic stripes, hind margins of the abdominal segments, antenne, and legs

black; abdomen laterally yellowish, and slightly transparent ; palpi rufous.

Length 8 millim.

Front narrowed behind and not so broad as the eyes; frontal band narrower than the lateral portions; frontal

bristles descending on each side in a single curved row to beneath the end of the second antennal joint ;

face slightly retracted; the bristles of the facial ridges mounting to where the frontal bristles finish ;

beard and pilosity of the occiput whitish, Antenne shorter than the face; second joint bristly; third

joint nearly four times as long as the second; arista thickened to nearly half its length. Proboscis

brown. Thorax and scutellum greyish-cinereous; thoracic dorsum with four black stripes, which are

nearly confluent behind the transverse suture. Abdomen conical; first segment black; the following

segments cinereous, with black reflections on the hind margins and a black dorsal stripe; second and

third segments laterally yellowish, and more or less transparent ; anus rufous; macrochete on the disc

as well as on the hind margins of the segments ; ventral surface whitish-grey, with rufous or brown hind

margins to the segments and a black median stripe. Legs slender ; front femora with long bristles on the

upper- and undersides, the middle and hind femora with long bristles only on the underside ; front tibie out-

wardly with a row of very short bristles ; middle and hind tibiee with several long bristles ; foot-claws and

pulvilli elongate, the pulvilli whitish. Tegule whitish. Wings greyish-hyaline, without a costal spine ;

small cross-vein on the middle of the discal cell; curvation of the fourth vein with a blunt angle; apical

cross-vein oblique, straight; posterior cross-vein distinctly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single male specimen.

120 DIPTERA.

6. Prospherysa contigua, sp. n., 2.

Blackish ; thorax anteriorly grey with four black stripes; abdomen with grey reflections ; anus shining black ;

frontal band, antennz, and legs black ; hind tibie outwardly almost fringe-like with bristles,

Length 8 millim.

Front cinereous, as broad as the eyes; frontal band as broad as the lateral portions ; frontal bristles descending

on each side in a curved row to beneath the end of the second antennal joint; face whitish-grey, laterally

with a brown reflection ; the bristles of the facial ridges mounting up more than half the face. Antenne

‘ reaching to near the vibrisse; second joint bristly ; third joint four times as long as the second ; arista

thickened nearly to the proximal half. Proboscis black; palpi dark rufous. Thorax and scutellum

blackish, with some grey tomentum, which is most conspicuous before the transverse suture, and there

interrupted by four rather narrow black stripes. Abdomen elongate-oval; first segment black, scarcely

shorter than the following segments, which are blackish, with whitish-grey reflections on the front

borders; the hind margin of the third segment and the anus are shining black; a pair of short macro-

cheetz on the hind margin of the first segment; a similar pair of macrochetz on the disc, and another

pair on the hind margin of the second segment; a row of longer macrochete on the hind margin of the

third and several macrocheetee on the anal segment ; ventral surface black. Femora with several bristles on

the underside; front tibie outwardly with short bristles; middle tibie with some longer bristles; the

hind tibie outwardly almost fringe-like with bristles, and with a longer bristle below the middle;

foot-claws and pulvilli short. Tegule whitish. Wings nearly hyaline, slightly yellowish at the base,

without costal spine; small cross-vein almost on the middle of the discal cell; curvation of the fourth

vein with a blunt angle; apical cross-vein oblique and straight; posterior cross-vein distinctly curved.

Hab. Mexico, Cuernavaca (H. H. Smith).

A single female specimen.

7. Prospherysa crebra, sp. n., ¢ 2.

Cinereous ; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne (except the rufous

basal joints in the female), and legs black ; palpi rufous; cheeks with a row of bristles; posterior tibiz

dark rufous.

Length 9 millim.

Front prominent, yellowish, with cinereous reflections, in both sexes broader than the eyes; frontal band

narrower than the lateral portions ; frontal bristles on each side in a double row; face and cheeks yellowish,

more or less silvery, the face perpendicular, the cheeks with a row of stout bristles (forming the continua-

tion of the frontal bristles) close to the orbits of the eyes. Antenne of the male long and reaching the

vibrisse, of the female shorter ; basal joints short, in the female rufous; second joint bristly ; third joint

four (2) or six (3) times as long as the second; arista thickened to beyond the middle, the penultimate

joint somewhat distinct and elongate. Proboscis black; palpi cylindrical, pale rufous. Thorax grey,

with four distinct, equal, black stripes ; scutellum testaceous, but usually covered by a cinereous tomentum.

Abdomen ovate (in the male more elongate), cinereous, with a yellowish tint, which becomes more intense

towards the anus, the anal segment sometimes ochraceous ; the first three segments have irregular blackish

reflecting spots, amongst which a somewhat interrupted black dorsal stripe appears; the first two segments

have a pair, and the third and anal segments a complete row, of marginal macrochete ; ventral surface

blackish ; male genitals prominent, in the form of a nipple, which is curved towards the venter. Legs

black; tibiee, especially of the intermediate and hind pairs, dark rufous; front tibie outwardly with a

row of short bristles; middle tibia with some long-and stout bristles ; hind tibie with bristles of unequal

length ; foot-claws and pulvilli elongate in the male, the pulvilli yellowish. Tegule white. Wings

greyish-hyaline; small cross-vein on the middle of the discal cell; apical cross-vein concave at the base ;

posterior cross-vein slightly curved.

Hab. Mexico, Amula 6000 feet, Xucumanatlan 7000 feet, and Omilteme 8000 feet,

all in Guerrero (H. H. Smith).

Many specimens.

PROSPHERYSA. 121

8. Prospherysa rufifrons, sp. n.,¢.

Cinereous; thorax with four black stripes ; abdomen testaceous, with grey reflections ; front, basal joints of the

antenn, palpi, and the legs partly, rufous; cheeks with some bristles.

Length 10 millim.

Front much broader than the eyes, cinereous, usually with a very conspicuous rufous reflection ; frontal band

proportionately narrow, dark rufous ; frontal bristles on each side in a double row, descending as far as the

end of the second antennal joint; face and cheeks yellowish-white, the cheeks broad, and here and there

with rufous reflections; bristles on the facial ridges few in number; some other bristles on the cheeks in

the middle between the facial ridges and the orbits of the eyes, these bristles shorter than the frontal

and facial ones. Antenne shorter than the face; basal joimts rufous; second joint with short bristles ;

third joint black, three times as long as the second ; arista thickened to beyond the middle. Proboscis

black ; palpi pale rufous, slightly thickened towards the tip. Thorax cinereous ; thoracic dorsum with

four black stripes, the median of which are linear; scutellum testaceous, with greyish tomentum.

Abdomen ovate, convex, testaceous, with grey reflections (chiefly on the front borders of the segments) ;

sometimes a brown dorsal stripe appears, and near it two or more lateral spots; on each of the first

and second segments a pair of marginal macrochete; on the hind margin of the third segment a row,

and on the anal segment a double row, of macrochete. Legs rufous, the tibia more obscure, the tarsi

black ; front tibia outwardly with a row of short bristles; middle tibie with some long bristles ; hind

tibie outwardly fringed, and with a longer bristle below the middle. Tegule white. Wings greyish-

hyaline; small cross-vein on the middle of the discal cell; apical cross-vein concave ; posterior cross-vein

straight.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single female specimen.

9. Prospherysa vilis, sp. n.,3 2.

Cinereous; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne (¢ 2), and legs black ;

palpi rufous; cheeks with some weak hairs ; posterior tibiz dark rufous.

Length 75-10 millim.

Allied to P. crebra, and agreeing with it in most of its characters, but differing in the absence of the bristles

on the cheeks, these in P. vlis being reduced to some fine hairs; the coloration of the insect is generally

more obscure, and the scutellum blackish, though eften somewhat testaceous on the hind margin. In the

female the basal joints of the antenne are not rufous, but black, as in the male. The anal segment has,

in addition to the macrochetz at the hind margin, a second row of macrochetze on the disc. The third

vein is slightly curved before its end. The male genitals are prominent and nipple-like, as in P. crebra.

Hab. Muxtco, Chilpancingo 4600 feet, Amula 6000 feet, Xucumanatlan 7000 feet,

and Omilteme 8000 feet, all in Guerrero (H. H. Smith).

A large series of specimens.

-P. crebra and P. vilis are apparently very common species in Mexico.

10. Prospherysa albifacies, sp. n., 2.

Cinereous; face and cheeks white; frontal band, four thoracic stripes, reflections on the abdomen, antenne

(except the rufous basal joints), and legs black ; palpi rufous; cheeks with some weak hairs.

Length 7°5 millim.

- Front grey, slightly prominent, much broader than the eyes; frontal band blackish, broad, but narrower than

the lateral portions; frontal bristles on each side in three rows, somewhat irregularly descending to beneath

the second antennal joint; face and cheeks with silvery reflections ; bristles on the facial ridges few in

number; on the cheeks some weak hairs, Antenne shorter than the face; basal joints rufous; third

joint black, three or four times as long as the second; arista thickened to beyond the middle, the

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1890. r

122 DIPTERA.

penultimate joint scarcely recognizable (apparently somewhat elongate). Proboscis black ; palpi pale

rufous, infuscated at the tip. Thorax and scutellum cinereous, the thorax anteriorly white ; thoracic dorsum

with four distinct stripes. Abdomen elongate-oval, cinereous, without any yellowish tint, with blackish

reflections; some macrochete on the hind margins of the segments; ventral surface blackish-grey.

Front tibize with short bristles; middle tibia with some long bristles; hind tibie outwardly with bristles

of unequal length. Tegulea white. Wings greyish, near the base with a brownish-yellow tint; small

cross-vein a little before the middle of the discal cell; apical cross-vein concave; posterior cross-vein

very slightly curved.

Hab. Mexico, Santiago Iscuintla in Jalisco (Schumann).

A single female specimen.

11. Prospherysa macilenta, sp. nc.

Body slender ; shining black; head, the thorax anteriorly and laterally, and the front borders of the second

and third abdominal segments whitish; palpi rufous.

Length 6-5 millim,

Front as broad as the eyes, black, with whitish reflections; frontal band as broad as the lateral portions ;

frontal bristles not descending beneath the root of the antenne ; face and cheeks white; facial ridges with

rather weak bristles, which mount up half the face. Antenne black, shorter than the face; basal joints

short ; third joint slender, five times as long as the second; arista thickened in its proximal half; the -

extreme base of the third antennal joint and the thickened portion of the arista somewhat rufous.

Proboscis black ; palpi dark rufous. Thorax with a whitish tomentum, which is most conspicuous before

the transverse suture (where it is interrupted by four black stripes) and on the pleurw; scutellum black,

with whitish reflections. Abdomen distinctly longer than the thorax, convex, rather narrow, shining

black ; first segment as long as the second; front borders of the second and third segments with a white

reflection; macrochete long, on the hind margins of all the segments. Legs black (the intermediate pair

are broken off); front femora outwardly with a whitish tomentum ; tibie with several lorg bristles ; foot-

claws and pulvilli somewhat elongate. Tegule bone-white. Wings greyish-hyaline; small cross-vein

on the middle of the discal cell; third vein slightly undulate; apical cross-vein oblique and straight ;

posterior cross-vein distinctly curved, inserted nearly in the middle between the small cross-vein and the

curvation of the fourth vein. .

Hab. Mexico, Orizaba (F. D. G. & H. H. Smith).

A single male specimen.

12. Prospherysa apicalis, sp. n.,¢ 2.

Blackish ; head ochraceous; thorax greyish, with four black stripes; abdomen with grey and white reflections,

the anal segment yellowish-rufous; palpi rufous.

Length 8-9 millim.

Front a little narrowed behind (¢), broader than the eyes (2); frontal band black; frontal bristles on each

side in a single row, and descending as far as the end of the second antennal joint ; the female with some

lateral bristles ; cheeks without bristles or hairs. Antenne black, reaching to near the vibrisse; second

joint with some bristles; third joint five or six times as long as the second; arista indistinctly jointed,

thickened to beyond the middle. Proboscis black; palpi dark rufous. Thorax with grey, anteriorly

with white tomentum; thoracic dorsum with four equal black stripes, which posteriorly become less

conspicuous in the more general black coloration behind the transverse suture; scutellum blackish.

Abdomen ovate, blackish, with some grey and white reflections, which usually appear as a narrow white

front border to the second and third segments, and laterally are more extended ; sometimes a black dorsal and

two black lateral spots become conspicuous on these segments; anal segment ochraceous, with a reddish

tint ; macrochete are on the hind margins of the first three segments, and more irregularly, though

shorter, on the anal segment; ventral surface densely clothed with black hairs. Legs black; front tibia

PROSPHERYSA. 123

outwardly with short bristles; middle tibize with some long bristles ; hind tibiee outwardly nearly fringe-

like with bristles and with a longer bristle below the middle; foot-claws andpulvilli elongate in the male,

the pulvilli whitish. Tegule and wings greyish-hyaline ; small cross-vein nearly on the middle of the

discal cell; apical and posterior cross-veins in the same oblique direction, the apical slightly concave, the

posterior more distinctly curved.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. IZ. Smith).

One male and three females.

13. Prospherysa rectinervis, sp. n., 9.

Cinereous; four thoracic stripes, hind borders and reflections on the abdominal segments, antenne, and legs

black ; palpi rufous ; exterior cross-veins straight.

Length 5 millim.

Front yellowish-white, scarcely broader than the eyes; frontal band brown, as broad as the lateral portions ;

frontal bristles on each side in a single row distinctly descending to beneath the second antennal joint;

face and cheeks white, somewhat silvery. Antenne descending to the vibrisse ; second joint bristly ;

third joint five times as long as the second; arista indistinctly jointed, thickened to beyond the middle.

Proboscis black; palpi pale rufous. Thorax and scutellum greyish-cinereous ; thoracic dorsum with four

equal black stripes, which are “conspicuous even behind the transverse suture; scutellum flattened.

Abdomen ovate; first segment black; the following segments greyish-cinereous, with black reflections,

which sometimes form a dorsal and two lateral spots, the hind borders always shining black and with

macrochset ; ventral surface blackish. Middle tibize with some long bristles; hind tibie outwardly with a

row of short bristles and with a longer bristle below the middle. Tegule whitish. Wings nearly hyaline;

small cross-vein scarcely before the middle of the discal cell; apical and posterior cross-veins straight,

and in the same oblique direction.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (A. H. Smith).

A single female specimen.

14. Prospherysa minuta, sp.n.,?. (Phospherysa minuta, Tab. III. fig. 16.)

Greyish; frontal band, hind borders of the abdominal segments, antenne, and legs black; frontal band

. narrow, linear.

Length 4:5 millim.

Head white; front nearly as broad as the eyes; frontal band very narrow ; frontal bristles descending on each

side in a curved row to beneath the second antennal joint; face laterally silvery ; facial bristles mounting

as far as the base of the third antennal joint. Antenne nearly as long as the face; third joint six times as

long as the second; arista thickened in its proximal third. Proboscis and palpi black (in one of the specimens

the palpi seem to have a rufous tip). Thorax greyish-cinereous, anteriorly with four black lines, the

outer of which are less distinct; scutellum cinereous. Abdomen elongate-oval; first segment black,

short; the following segments greyish, with black reflections on the hind borders and a black dorsal

. stripe; macrochete only on the hind margins of the segments ; ventral surface blackish. Femora with

bristles on the underside, the front femora also with bristles on their upperside ; front tibie outwardly

with a row of bristles; middle tibiee with some long bristles; hind tibiz outwardly with several bristles

of unequal length; foot-claws and pulvilli short. Tegule whitish. Wings greyish-hyaline; small cross-

vein distinctly before the middle of the discal cell; curvation of the fourth vein with a somewhat blunt

angle; apical and posterior cross-veins slightly curved, and in almost the same oblique direction.

Hab. Mexico, Cuernavaca (H. H. Smith).

Four female specimens.

r 2

124 DIPTERA.

15. Prospherysa serotina, sp. n., ¢.

Greyish ; frontal band, hind borders of the abdominal segments, antenme, and legs black ; frontal band nearly

as broad as the lateral portions; palpi rufous.

Length nearly 6 miliim.

Closely allied to P. minuta, but somewhat larger in size. The frontal band is broader; the facial bristles are

less numerous, short, and weak, mounting to half the face; the palpi are pale rufous; the small cross-

vein is placed scarcely before the middle of the discal cell, and the apical cross-vein is straight.

Hab. Mexico, near the city (H. H. Smith).

A single female specimen.

16. Prospherysa parvipalpis, sp.n.,3 9. (Phospherysa parvipalpis, Tab. III.

figg. 15, head in profile; 15 a, wing.)

Cinereous; head whitish; antennee (at least their basal joints), frontal band, and palpi rufous; thorax with

four black stripes; first abdominal segment, hind borders of the following segments, and legs black ;

apical and posterior cross-veins very oblique.

Length 5-7 millim..

Front a little narrowed behind, in the female broader than the eyes; frontal band as broad as the lateral

portions, truncated on the vertex; frontal bristles descending on each side in @ curved row to a little

beneath the second antennal joint ; the bristles on the vertex robust. Face perpendicular; facial bristles

mounting to where the frontal bristles finish; beard white. Antenne a little shorter than the face ;

second joint bristly ; third joint linear, four times as long asthe second, infuscated towards the tip, some-

times wholly blackish; arista thickened in its proximal half. Palpi very small, filiform. Thoracic dorsum

with four black stripes, these heing partly visible even behind the transverse suture; scutellum blackish

on the basal half. Abdomen conical; first segment black, shorter than the following segments; second

segment with a black hind border, this border in the middle being extended into a pair of black quadrate

dorsal spots; on the third segment the hind border has a similar coloration, which, however, is broader

and excised in the middle; on neither of these segments are discal macrochete present; ants shining

black ; ventral surface densely clothed: with black pile, especially towards the anus. Legs with scattered

bristles ; foot-claws and pulvilli somewhat elongate. Tegule whitish. Wings hyaline; apical cell ending

at some distance from the wing’s tip; fourth vein at its curvation with a longitudinal fold, which resembles

a prolongation of the vein; small cross-vein beyond the middle of the discal cell ; apical and posterior

cross-veins very oblique, the latter in or before the middle between the small cross-vein and the curvation

of the fourth vein.

Hab. Mexico, Northern Sonora (Morrison), Presidio (Forrer), Tepetlapa 3000 feet,

and Omilteme 8000 feet, both in Guerrero (H. H. Smith).

A female and three male specimens.

17. Prospherysa balteata, sp. n., 2.

Cinereous ; head whitish; frontal band, four thoracic stripes, hind borders of the abdominal segments, antenna,

and legs black.

Length 5:5-6°5. millim.

Closely allied to the preceding species, but differing in the black colour of the antenne and frontal band. The

palpi are more developed, pale rufous, cylindrical. The stripes on the thorax are more distinct. The

venation of the wings agrees with that of P. parvipalpis, except that the small cross-vein rests on the

middle of the discal cell, and the posterior cross-vein is beyond the middle between the

small cross-vein

and.the curvation. of the fourth vein..

PROSPHERYSA.—SIPHONA.. 125

Hab. Mexico, Dos Arroyos 1000 feet, and Tierra Colorada 2000 feet, both in Guerrero

(1. H. Smith).

Two female specimens.

fo #2

ee 24° of i he eee é

18. Prospherysa plagioides, sp.n,@. ‘Ji. vee ©

Blackish ; thorax cinereous, with black stripes; abdomen with grey reflections, and with white front margins

to the segments; palpi rufous or with a rufous tip ; posterior cross-vein very oblique.

Length 4-5 millim.

Head broader than the thorax, greyish-white; front much broader than the eyes; frontal band black; frontal

bristles on each side in a curved row, two of them descending beneath the root of the antennex ; facial

bristles mounting to more than two-thirds of the face. Antenne as long as the face; third joint six

times as long as the second; arista thickened to, or to a little beyond, the proximal half. Proboscis

black, with the terminal lips rufous; palpi short, pale rufous, or at least rufous at the tip. Thorax

and scutellum cinereous; thoracic dorsum with four black stripes, the median two of which are linear

and more distinct. Abdomen conical, truncate at the anus ; first segment black ; the following segments

black, with grey reflections and white front margins; macrochete only on the hind margins of the

segments. Legs black, with scattered bristles. Tegule whitish. Wings greyish-hyaline; third vein

bristly from the base to the small cross-vein, the latter distinctly before the middle of the discal cell;

curvation of the fourth vein with a blunt angle and without appendage; apical cross-vein concave ;

posterior cross-vein nearly straight and much more oblique.

Hab. Mexico, Amula in Guerrero 6000 feet, Cuernavaca in Morelos (H. H. Smith).

Several female specimens.

In the neuration of the wings this species approaches the genus Plagia; but the

bristles on the facial ridges and the very long antenne show that it is better placed

in Prospherysa.

SIPHONA.

Siphona, Meigen, in Illiger’s Magaz. ii. p. 281 (1803).

This genus is distinguished by the very long and slender proboscis, of which the

apical half is turned backward. It contains some very common species in Europe; and

two are here described (and a third noticed) from Central America. With the exception

of one species from Brazil, Tachina singularis, Wied. (Aussereur. zweifl. Ins. 11. p. 339.

100), which is a Stphona according to Jaennicke (Neue exot. Dipteren, p. 87), the

genus has not yet been recorded from any other part of the world.

1. Siphona futilis, sp.n., ¢ 9.

Thorax cinereous, without stripes; abdomen rufous, with blackish markings ;. frontal band, palpi, and legs

rufous; antenne (except sometimes the basal joints) and tarsi black.

Length 2°5 millim.

Head yellowish-white ; front broader than the eyes; frontal band pale rufous; frontal bristles inserted on

black warts; occiput grey. Antenne black; the basal joints showing a tendency to become rufous ;

third joint rather narrow, three (2) or four (¢)) times as long as the second ; arista nicked, thickened

in its proximal half, the penultimate joint half the length of the terminal one. Proboscis. black, rufous

towards the tip; palpi pale rufous. Thorax and scutellum cinereous, without markings, but with

numerous little black points, on each of which a hair is inserted. Abdomen—{ ¢) nearly cylindrical,

126 DIPTERA.

yellowish-rufous, the first and second segments each with a blackish or dark cinereous dorsal spot, the

third segment with a broad cinereous hind border, and the anal segment entirely cinereous—( 9 ) elliptical,

the second and third segments cinereous, with narrow rufous front borders; first segment with two lateral

macrocheete, one on each side; second segment with four macrochete, two dorsal and two lateral; third

and fourth segments each also with four macrochete. Legs, including the coxe, rufous, and with some

scattered bristles; hind femora infuscated towards the tip; tarsi black. Tegule yellowish-white. Wings

greyish-hyaline ; small cross-vein before the middle of the discal cell; curvation of the fourth vein rounded ;

apical cell ending in the wing’s tip, very narrowly opened or nearly closed ; posterior cross-vein subperpen- —

dicular, in the middle between the small cross-vein and the curvation of the fourth vein. In the female

specimens a small costal spine is present.

Hab. Mexico, Orizaba (F. D. G. & H. H. Smith), Xucumanatlan 7000 feet and

Omilteme 8000 feet in Guerrero, Cuernavaca, Mexico city (H. H. Smith).

Several specimens of both sexes.

2. Siphona diluta, sp.n.,¢ ¢.

Thorax cinereous, anteriorly with blackish stripes; abdomen rufous, with cinereous or blackish markings;

frontal band and antenne (except sometimes the basal joints) black; legs rufous, partly infuscated ;

wings brownish.

Length 3—4 millim.

Front cinereous, broader than the eyes; frontal bristles inserted on black warts; face and occiput grey or

whitish; no bristles above the vibrisse. Antenne black, the basal joints rufous in the female; third

joint rather broad, three (9) or four (g) times as long as the second; arista thickened to near the tip,

the penultimate joint shorter than the terminal one. Proboscis blackish ; palpi rufous, sometimes black

at the tip in the male. Thorax and scutellum cinereous; thoracic dorsum anteriorly clearer and with

four dark lines. Abdomen—( ¢ ) elliptical, yellowish-rufous, the first and second segments with a blackish

~ dorsal stripe, which is laterally extended on the hind margin of the second segment, the third and anal

segments blackish, with yellow front borders—( @ ) ovate, dark cinereous, with yellowish front borders to

the segments; macrochete as in the preceding species, but absent on the first segment. Legs, including

the coxe, rufous, with several weak bristles; all the femora infuscated towards the tip; hind tibie

brownish at the base and near the tip; tarsi black. Tegule yellowish. Wings dilute brown; small

cross-vein on the middle of the discal cell; curvation of the fourth vein rounded; apical cell very

narrowly opened at the wing’s tip; posterior cross-vein perpendicular, in the middle between the small

Pa .

cross-vein and the curvation of the fourth vein ; no costal spine. [Vemaanener § 4 pe

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

Four male and five female specimens.

8. Siphona 2

This species, represented by one example of each sex, has (like the preceding two) the general facies of the

European Siphone ; but seems to differ from them in the shorter proboscis (perhaps a part of it is broken

off), The antenne are wholly rufous; the third joint is rather broad; the arista jointed, but not nicked.

The thorax is cinereous, without stripes. The second and following abdominal segments have white front

borders, which are especially distinct in the female, as in that sex these segments are for the rest black.

Length 2°5 millim.

Hab. Mexico, Amula in Guerrero 6000 feet, Teapa in Tabasco (H. H. Smith).

A female specimen from the former, a male from the latter locality.

THRYPTOCERA.—LASIONA. 127

THRYPTOCERA.

Thryptocera, Macquart, Suites 4 Buffon, Diptéres, ii. p. 87. 4 (1835).

In the collection of Professor Bellardi in Turin are three specimens from Mexico,

which undoubtedly belong to this genus. They have quite the aspect of the.European

forms. Two of them seem to belong to the same species; in these the frontal band,

the basal joints of the antenne, the palpi, scutellum, abdomen, and legs are rufous; the

thorax is cinereous;. the wings are slightly brownish; the first vein is bristly over its

whole length, the third only as far as the small cross-vein, which is placed on the middle

of the discal cell; and the posterior cross-vein is inserted in the middle between the

small cross-vein and the curvation of the fourth vein. Their length is 4°5 millim.

The third specimen seems to belong to a distinct species, as it is much smaller

(3 millim.), and has the third antennal joint broader.

The somewhat imperfect preservation of the specimens does not permit me to give a

full description of them ; but it is necessary to state that the genus Thryptocera has its

representatives in Central America. For the present I prefer to leave them thus :—

1. Thryptocera —— ?

Hab. Mexico (coll. Bellardi).

2. Thryptocera —— ?

Hab. Mexico (coll. Bellardi).

LASIONA, gen. nov.*

Eyes hairy. Cheeks narrow; no facial bristles. Antenne nearly as long as the face; third joint at least

three times as long as the second; proboscis and palpi prominent. Abdomen ovate ; first segment short ;

scutellum and abdomen very densely beset with bristles. Wings without a costal spine; apical cell

opened near the wing’s tip; fourth vein not prolonged at its curvation; posterior cross-vein very near

this curvation.

The head is as broad as the thorax, the front narrowed behind; the face long, slightly

inclined ; the vibrissee are inserted on the oral margin, which is somewhat prominent,

and above them are some shorter bristles ; on the cheeks is a short pile; the facial ridges

are bare. The arista is not distinctly jointed. ‘The palpi are not thickened towards

the tip. The thorax bears the usual macrochete; those of the scutellum are very

numerous and erect, except on the hind margin, where they are directed backward.

The abdomen is broader than the thorax; and its entire surface, with ‘the exception of

- the front borders of the segments, is beset with numerous and long macrochete. ‘The

legs are slender.

The hairy eyes, the relative length of the antennal joints, and the absence of facial

bristles show that this new genus is allied to Hvrorista; from which it differs in the

* Adouos, hairy.

128 DIPTERA.

dense pilosity and the numerous macrochete on the scutellam and abdomen, and in

the apical cell ending nearly in the wing’s tip.

1. Lasiona multisetosa, sp.n.,g. (Tab. III. figg. 20; 20 a, head in profile.)

Grey; four stripes on the thorax, hind borders of the abdominal segments, antenne, palpi, and legs black ;

wings dark brown.

Length 11 millim. .

Of a bluish-grey coloration ; the thoracic dorsum with four black stripes, which are interrupted at the trans-

verse suture, the outer ones the broadest; the base of the scutellum black; the abdomen with black

reflecting spots, especially on the hind borders of the segments, the spots giving it the appearance of

being marked with black transverse bands (these markings, however, are much obscured by the very

dense pilosity which covers the abdomen). Front with dark reflections; frontal band black; frontal

bristles descending on each side to the number of three beneath the root of the antenne; eyes with a

whitish pile. Antenne rather slender; sccond joint with several bristles; arista long, and slightly

thickened in its proximal half. Proboscis and palpi black or piceous. Femora outwardly with grey

tomentum, the front and hind pairs with many bristles on the underside ; middle tibie outwardly with

three long bristles; foot-claws rufous at the base. Tegule and wings dark brown ; small cross-vein before .

the middle of the discal cell; apical cross-vein deeply incurved at its base, so that the inferior angle of

the apical cell is projecting; posterior cross-vein strongly undulate.

Hab. Costa Rica, Rio Sucio (Rogers).

A single male specimen.

MACQUARTIA.

Macquartia, Robineau-Desvoidy, Essai sur les Myodaires, p. 204 (1830).

This genus (in the sense that it is adopted by Schiner, and thus including the genera

Erebia, Amodea, and Albinia of Robineau-Desvoidy) has by its slender form and

elongate legs a Dewxia-like aspect. The head is somewhat hemispherical, as broad as

the thorax; the face is short, nearly perpendicular, the oral margin rounded; the ©

front is much narrowed behind in the males, the eyes sometimes being almost

contiguous; the cheeks are broad; the eyes are pilose; the vibrisse are inserted

at some distance above the oral margin; the facial ridges have no bristles; the

antennee are shorter than the face, the third joint usually twice as long as the second,

the arista not visibly jointed, sometimes microscopically pubescent; the palpi are

cylindrical, or slightly thickened towards the tip. The abdomen is conical or elongate-

oval, with discal and marginal macrochete. The body and legs generally have many

bristles. The wings are large, with the apical cell opened at a short distance before

the wing’s tip. |

In the Central-American collections which I have for examination I find specimens

of four species belonging to the genus Macquartia, these, unfortunately, with one

exception, being represented by males only. ‘Three of the species are closely allied to

each other, and distinguished (in the male sex) by a more elongate-conical shape of the

abdomen than is usual in the European forms; the fourth species has a more ovate

abdomen, and the latter rufous or testaceous, a coloration quite different from that of

MACQUARTIA. 129

the others. A character common to all four is the unusual length of the bristles

behind the posterior orbits of the eyes. The collections also contain four female

specimens which undoubtedly belong to one or the other of the first three species; but

as I cannot find good distinguishing characters common to both sexes, it remains

uncertain whether I have correctly paired them. The males may be recognized as

follows :—

1. Eyes nearly contiguous on the vertex (anal segment

compressed and pointed) . . ... + 2 2 Q

Eyes distinctly separated over the whole length of the

front. . . . ‘ . 3.

2. Underside of the abdomen with long whitish or ‘yellowish

hairs. . . . . setiventris, v. d. Wulp.

Underside of the abdomen with black hairs and bristles . acuminata, v. d. Wulp.

3. Antenne black; abdomen elongate-conical (the anal

_ segment compressed), black, with white reflections . venusta, v.d. Wulp.

Antenne rufous; abdomen ovate, testaceous, with black

and ochraceous reflecting spots . . . . . . . « versicolor, v.d. Wulp.

_ 1. Macquartia setiventris, sp.n., ¢. (Tab. III. figg. 21; 21a, the insect

in profile.)

Shining black; humeral spots and reflections on the abdomen whitish; eyes nearly contiguous towards the

vertex; ventral side of the abdomen with long yellowish hairs; antenne and legs black, the tibie of a

more piceous colour; palpi rufous; wings with a brownish tint along the costa.

Length 10-5 millim.

Head whitish, with cinereous reflections ; front narrowed behind in such a manner that the eyes are nearly

contiguous on the vertex; frontal band black, trigonal; frontal bristles numerous, forming a single row

on each side of the frontal band; beard and pilosity of the occiput pale yellow; behind the posterior

orbits of the eyes a row of rather long black bristly hairs; the bristles above the vibriss close together.

Antenne as long as two-thirds of the face, black, with the basal joints dark rufous; second joint bristly ;

third joint rounded at the tip; arista thickened in its proximal half. The palpi and the terminal lips

of the proboscis rufous and bearing some bristly hairs. Thorax black, anteriorly with some grey

tomentum, in which four black stripes are visible; humeral spots whitish, and prolonged in a band

towards the root of the wings; a whitish stripe extending obliquely over the pleura and middle coxa ;

scutellum with long macrochete at the hind margin. The light reflections on the abdomen appear like

white front borders to the second and following segments; sometimes these front borders become laterally

broader, and have more or less the aspect of two white spots; the anal segment, seen from above, is

compressed and pointed, and, seen from the side, obliquely truncated; the genitals are prominent, and

bear several hairs and bristles; laterally the abdomen has many long bristles; on the ventral side is a

long pale yellow pile, mixed with some black bristles. Middle and hind tibie rather dark rufous; the

bristles of the legs numerous and for the greater part long :—the middle femora have on the underside

some long bristles on the proximal half, and a row of hairs towards the tip; the middle and hind tibie

have several long bristles ;—the foot-claws and pulvilli are elongate, the pulvilli yellowish. Tegule greyish-

yellow. Wings grey, dilute brownish along the costa; small cross-vein before the middle of the discal

cell ; apical and posterior cross-veins slightly curved.

_ Hab. Mexico, Orizaba (coll. Bellardi), Omilteme in Guerrero 8000 feet (H. H. Smith).

One male specimen from each of these localities.

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1890. 8

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130 DIPTERA.

This species bears some resemblance to Exorista elongata (anted, p. 65); but the

apical cell ends nearer to the tip of the wing, the front is much narrower, and the body

and legs are more densely pilose.

2. Macquartia acuminata, sp. n., ¢ (22).

‘Shining black ; thorax grey, with four black stripes; abdomen with six white reflecting spots ; ; eyes nearly

contiguous towards the vertex; antennz and legs black; palpi rufous; wings with a brown tint on the

costa and along the veins.

Length 16 millim.

In addition to its much larger size, this species differs from the preceding in its more distinct thoracic stripes

_ and wholly black antennz and legs, and also in the white reflections on the abdomen, these being inter-

rupted by a broad black dorsal band (thus. haying the appearance of quadrate lateral spots). The hairs of

the underside of the abdomen are, without exception, black; the anal segment is compressed and pointed.

(either seen from above or seen from the side); the tegule are dark grey, with a yellowish margin ; the

brownish tint on the costa of the wings is more intense and extended, forming a shadow along the veins.

Hab. Mzxico, Amula 7000 feet and Omilteme 8000 feet, both in Guerrero (H. H.

Smith).

Three male examples. The female specimens mentioned above (and which are from

the same localities as the males) possibly belong to this species, as they have the wings

infuscated nearly in the same manner, and the stripes on the thorax very distinct.

They are, however, of a much smaller size (9°5 millim.); the head is whitish, but not

silvery, the front nearly as broad as the eyes, the frontal band deep black; the abdomen

much shorter, and the white front borders of the segments not so sharply limited.

3. Macquartia venusta, sp. n., ¢.

Shining black; thorax anteriorly and laterally with white reflections; second and following abdominal

segments with white front borders; front narrowed behind, but separating the eyes; antenne and legs

black; palpi rufous; wings with a brownish tint along the costa.

Length 12 millim.

This species is closely allied to M. setiventris and M. acuminata, and, in size, it is intermediate between them ;

it may, however, be easily recognized from either by the eyes being distinctly separated. The abdomen is

of the same elongate-conical shape, but the anal segment is somewhat truncate at the tip, and less pointed ;

the frontal band is velvety-brown, narrowed behind; the face, cheeks, and sides of the front are more pure

white, somewhat silvery; the basal joints of the antenne seem to have a tendency to become rufous; the

whitish tomentum anteriorly on the thoracic dorsum is interrupted by four black stripes (which, however

are less distinct than in M. acuminata); the tegule are white; the wings have only a dilute brownish tint

along the costa.

Hab. Mexico, Amula 6000 feet and Xucumanatlan 7000 feet, both in Guerrero

(H. H. Smith).

Several male specimens.

4. Macquartia versicolor, sp. n.,¢.

Front narrowed behind, but separating the eyes; thorax with four black stripes ; abdomen ovate, testaceous,

with blackish and ochraceous reflecting spots; antenne and palpi rufous; legs black, sometimes partly

dark rufous.

Length 6°5-10-5 millim.

MACQUARTIA.—LABIDIG ASTER. 131

Face, cheeks, and sides of the front yellowish or pale ochraceous, with brown reflections; front much narrowed

towards the vertex, but the eyes distinctly separated ; frontal band black, occupying nearly the whole front ;

cheeks broad, with a trigonal impression; beard black. Antenne rufous; second joint with short black

bristles ; third joint one and a half times as long as the second, infuscated towards the tip; arista slightly

thickened in its proximal half. Proboscis black, with the terminal lips rufous ; palpi cylindrical, rufous,

blackish at the tip. Thorax black, of a bluish tint in front of. the scutellum, laterally and before the

transverse suture ochraceous or greyish ; thoracic dorsum with four black stripes; scutellum piceous, with

some ochraceous tomentum. Abdomen ovate, convex; first segment black, shorter than the following

segments, which are testaceous or dark rufous, with blackish-brown and ochraceous reflecting spots ; discal

and marginal macrochetw regularly arranged ; ventral surface shining testaceous, with a black median

stripe. Legs black or piceous (the tibie usually dark rufous), with many bristles, the middle tibisee with

some longer ones; foot-claws and pulvilli elongate, the claws black, the pulvilli yellowish. Tegule

greyish-rufous. Wings brownish; curvation of the fourth vein with an acute angle; small cross-vein

distinctly infuscated, inserted on the middle of the discal cell; apical and posterior cross-veins curved.

_ Hab. Mexico, Xucumanatlan 7000 feet, Omilteme 8000 feet, Sierra de las Aguas

Escondidas 9500 feet, all in Guerrero (H. H. Smith).

Several male specimens. | | otek .

LABIDIGASTER. | Clainwi in

Labidigaster, Macquart, Ins. Dipt. du nord de la France, p. 109 (1834).

I include in this genus a species from Central America which seems to agree in most

respects with the European Labidigaster forcipata; the latter is unknown to me, but,

so far as I can judge from the characters indicated by several authors, the Central-

American insect does not differ from it generically. It is remarkable that the species

here described has not only the forcipate anus (hitherto unique among the Tachinine),

but that it is very similar in coloration and other particulars to L. forcipata.

Schiner places Labidigaster among the genera in which the apical cell is opened at

some distance before the wing’s tip. In the American species, on the contrary, the

apical cell ends very near the wing’s tip; but this fully conforms with Meigen’s figure

of L. forcipata (System. Beschr. europ. zweifliigl. Ins. vii. t. 70. fig. 86) and with his

description of the genus (/. ¢. p. 228). According to Meigen the eyes should be hairy,

and in his figure the pilosity of the eyes is represented as very conspicuous; in the

Central-American species, on the contrary, the eyes are absolutely bare. But this dif-

ference does not seem to be of much importance, as Schiner, who possessed a specimen

of L. forcipata, describes (Fauna Austriaca, Dipt. i. p. 436) the eyes as “thinly pilose,

often bare,” and Rondani, who knew four species, says (Dipt. Ital. Prodr. iv. p. 87) that

he has observed in none of them any pilosity on the eyes.

1. Labidigaster furcata, sp.n., 9. (Tab. III. figg. 22,abdomen; 22 a, wing.)

Shining black; head white; thorax with some grey tomentum and anteriorly with black stripes; anus with a

small forceps.

Length 4°5 millim.

Head rounded; front as broad as the- eyes, the lateral portions parallel; fromtal-band black ; frontal bristles

descending as far as the end of. the second antennal joint; vibrisse at some distance above the oral

3 2

132 | DIPTERA.

margin. Antenne black, much shorter than the face ; second joint slightly prominent ; third joint twice

as long as the second; arista thickened at the base. Proboscis and palpi .... (retracted in the oral

cavity). The thorax and the scutellum are sparsely covered with whitish-grey tomentum, which is most

conspicuous on the shoulders and before the transverse suture, this part with traces of two broad black

- bands and (between these) two black lines. Abdomen elliptical, shining black, with a narrow whitish

front border to the second segment; the first three segments of equal length, the anal segment shorter

and ending in a small forceps with inwardly curved branches; macrochete rather long—two dorsal ones

on the hind margin of the first and second segments, and four on the hind margin of the third segment,

those of the anal segment shorter and weaker. Legs black, rather robust, the posterior tibie: with several

long bristles; foot-claws and pulvilli well developed, though not elongate. Tegule white. Wings

grey, rather broad, rounded at the end; small cross-vein a little before the middle of the discal cell;

apical cross-vein slightly concave; posterior cross-vein curved.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single specimen, which I believe to be a female, as all the authors (even Rondani,

who was acquainted with both sexes) are unanimous in attributing the peculiar furcate

shape of the anus to the female sex only.

This species differs from the European LZ. forcipata in its smaller size, in the sides of

the front being white with some grey reflection (instead of shining black), and in the

absence of a whitish front border to the third abdominal segment. |

MYOBIA.

Myobia, Robineau-Desvoidy, Essai sur les Myodaires, p. 99 (18380).

Several species from Central America agree in almost all their characters with

the European representatives of this genus. Many of the American species have the

arista pubescent or even shortly pilose, thus proving their close affinity with the group

Dexine ; more especially as they have the legs, and particularly the tarsi, more elongate

than in the majority of the Tachinine.

The species to be treated here may be distinguished as follows :—

1, Abdominal segments with discal and marginal macrochete. 2.

Abdominal segments with marginal macrochete only. . . 5.

2. Antenne yellow. . . woe ee we wwe flavicornis, v. d. Wulp.

Antenne black, the basal joints sometimes more or less

rufous 2. 6. 6 6 1 ee ee ee ee ee ee

3. Posterior cross-vein sinuous . . .....-.. =. . succincta, v. d. Wulp.

Posterior cross-vein straight . . . . . 2. 6 . . 2 w 4

4, Base of the femora rufous. . . . . . . .. . . © grata,v.d. Wulp.

Legs wholly blak . ..... . . . . seurra, v. d. Wulp.

5. Abdomen usually with a broad blackish dorsal stripe ~. . 6.

Abdomen without blackish dorsal stripe . . . ... . 8.

6. Legs black. . 2. 2. 1 1. 1 we ee ew ew ew ee . Lepida, vy. d. Wulp.

Legs rufous, or, at least, partly rufous. . . . . . . . 7%.

MYOBIA. 138

7. Proboscis short, palerufous . . . . .). . + + © « argenticeps, v. d. Wulp.

Proboscis long and slender, shining black . . . . . . opima,v.d. Wulp.

8. Third antennal joint as long as the second; abdomen cine- |

reous, with black hind borders to the segments . . . . angulata, v. d. Wulp.

Third antennal joint much longer than the second; abdomen

rufous, with black dorsal spots . . . . . . . + « Y

9. Frontal band black . . 2... . we ee ee eh) diadema, Wied.

Frontal band rufous or inconspicuous. . . . . .» 10.

10. Palpi exserted and reaching to considerably beyond the oral

margin; abdomen (seen laterally) attenuated towards the

anus ; third vein with a row of short bristles. . . . . dongipalpis, v. d. Wulp.

Palpi not longer than usual; abdomen (seen laterally)

convex; third vein without bristles. . . . . . . . flavipennis, Wied.

1. Myobia flavicornis, sp. n.,3 9. (Tab. IV. figg. 1; 14, head in profile.)

Thorax and scutellum cinereous; thoracic dorsum with four black stripes; abdomen rufous, with discal and

marginal macrochete; antenne yellowish; proboscis, palpi, and legs rufous ; tarsi black.

Length 7 millim.

Front very narrow (especially in the male), cinereous, with whitish reflections; frontal band black, linear ;

frontal bristles descending as far as the end of the second antennal joint; face and cheeks whitish-grey ;

vibrisse inserted at some distance above the oral margin. Antenne yellowish-rufous, reaching to the

lower third of the face ; second joint slightly prominent, with some short bristles ; third joint two or three

times as long as the second ; arista black, pubescent, tapering towards the tip. Palpi small, cylindrical,

sometimes infuscated at the tip. The black stripes on the thorax are very conspicuous, the outer ones the

broadest, the intermediate ones sometimes united to a quadrangular black spot behind the transverse

suture ; scutellum blackish at the base. Abdomen conical, yellowish-rufous, slightly transparent ; the

front margins of the segments with pale yellow, the hind margins with brown, reflections, which,

however, are not always conspicuous; an obsolete blackish dorsal stripe appears in most specimens ;

macrochete long and erect—eight on the dorsum (regularly arranged, and arising from small black

points), two, marginal, on the first segment, two discal and two marginal on the second segment, two

discal, some lateral, and a row on the hind margin of the third segment, and a double row on the anal

segment. Legs rufous, the tibie brownish, the tarsi black ; all the femora with some rather long bristles

on the underside; posterior tibiee with some bristles at the middle; foot-claws and pulvilli somewhat

elongate in the male, the pulvilli blackish. Tegule yellowish. Wings greyish-hyaline; third vein

slightly arcuate; curvation of the fourth vein with a blunt angle; small cross-vein on the middle of the

discal cell; apical and posterior cross-veins slightly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

Several specimens of both sexes.

2. Myobia succincta, sp.n., ¢ 9.

Yellowish (¢) or greyish-cinereous (?); frontal band, antenne, thoracic stripes, and hind borders of the

abdominal segments black; proboscis, palpi, and legs rufous; discal and marginal macrochete present ;

posterior cross-vein sinuous.

Length 6—9 millim.

Head white; front in the male narrowed behind, in the female as broad as the eyes; frontal band scarcely

narrower than the lateral portions ; frontal bristles on each side in a single row, descending as far as the

end of the second antennal joint ; vibrissz at the oral margin ; eyes descending to the inferior part of the

head; beard white. Antenne a little shorter than the face, the basal joints showing a tendency to

134 | DIPTERA.

become rufous ; second joint with short bristles ; third joint brownish-black, three or four times as long

as the second; arista thickened to near the middle, Proboscis and palpi pale rufous. Thorax and

scutellum ochraceous ( ¢ ) or greyish-cinereous ( 9); on the thoracic dorsum four distinct black stripes—

the intermediate ones linear, the outer ones interrupted at the transverse suture ; base of the scutellum

black. Abdomen—{ ¢ ) elongate-oval, yellow ; first segment, except a small part of the lateral portions,

black ; second segment with a large black dorsal spot, which laterally is extended to a narrow hind

border, but does not reach the sides; third and anal segments with broad black hind borders; ventral

surface rufous ;—( 2 ) ovate; first segment black ; the following segments greyish, the second and third

with the hind borders (narrowly i in the middle, more broadly so at the sides) shining black ; anal segment

pointed ; the ventral surface blackish. Coxee, femora, and tibie rufous, the tibiee more obscure ; tarsi

black ; front tibiee with short bristles; middle and hind tibie with some long bristles. Tegule yellowish-

white. Wings with a dilute brownish tint on the costal half, more hyaline on the posterior margin ;

small cross-vein on the middle of the discal cell; third vein slightly bent upwards before its end ;

curvation of the fourth vein with a somewhat rounded angle ; apical cross-vein very slightly concave ;

posterior cross-vein distinctly undulate.

Hab. Mexico, Sierra de las Aguas Escondidas 9500 feet in Guerrero (H. H. Smith).

Two specimens, one of each sex.

3. Myobia grata, sp. n.,

Yellowish ; frontal band, four thoracic ives, hind borders of the abdominal segments, antenne, and legs

black ; posterior femora rufous at the base; discal and marginal macrochete present; posterior cross-vein

straight.

Length 5°5-7°5 millim.

Head white ; front half as broad as the eyes: frontal band broader than the lateral portions; frontal bristles

on each side in a single row, descending to the root of the antennex ; vibrisse inserted a little above the

oral margin ; eyes descending to beneath the vibrisse ; beard consisting of some white bristles. Antenne

shorter than the face; second joint bristly ; third joint three times as long as the second; arista thickened

at the base. Proboscis black, with the terminal lips pale rufous; palpi pale rufous, very small. Thorax

and scutellum yellowish-rufous ; thoracic dorsum with four black stripes, the intermediate of which are

obsolete behind the transverse suture; base of the scutellum black. Abdomen subconical, convex,

greyish, laterally yellow and transparent; first segment almost wholly black, as long as the following

segments, which have black hind borders and discal as well as marginal macrochete, the black hind

border of the second segment being limited to the dorsal part and that of the third segment laterally

extended ; ventral surface yellow. Legs slender, black, the basal half of the middle and hind femora

rufous; hind tibia with some rather long bristles, the other bristles of the legs weak; foot-claws and

pulvilli of the front pair rather elongate. Tegule yellowish-white. Wings longer than the abdomen,

brownish-grey ; small cross-vein on or somewhat before the middle of the discal cell; third vein bent

upwards before its end; curvation of the fourth vein with a rounded angle; apical cross-vein very

slightly concave ; posterior cross-vein straight, a little beyond the middle between the small cross-vein and

the curvation of the fourth vein.

Hab. Mzxico, Amula 6000 feet and Sierra de las Aguas Escondidas 9500 feet, both

in Guerrero (H. H. Smith).

A male specimen from each locality.

4. Myobia scurra, sp. n., 3.

Grey ; frontal band, four stripes and a large spot on the thorax, hind borders of the abdominal segments, and

legs black ; palpi rufous; discal and marginal macrochaste present ; posterior cross-vein straight.

Length 5°5-6 millim.

Closely allied to the preceding species and resembling it in most respects. It differs, however, in the following

MYOBIA. . 135

particulars :—The ground-colour of the thorax and scutellum is whitish-grey ; the thoracic stripes are

only conspicuous before the transverse suture; behind this suture is a large black spot, occupying the

whole breadth of the thorax; the antenna, especially the basal joints, show a tendency to become rufous ;

the vibrisse are inserted just at the oral margin; and the legs are wholly black. The abdomen is similar

in shape and coloration to that of M. grata; but the front borders of the second and following segments

show white reflections, which are absent in M, grata.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

‘'wo male specimens.

5. Myobia lepida, sp. n., 3 2. |

Thorax and scutellum cinereous; abdomen yellow, transparent, with a dorsal stripe and the hind border of the

third segment black; no discal macrochete ; antenne (except the basal joints in the male, which are

rufous) and legs blackish.

Length 7 millim. :

Head white, with ochraceous reflections on the front and cheeks; front in the male much narrower than, in

the female scarcely as brvad as, the eyes; the frontal band black, linear in the male, as broad as the

lateral portions in the female; frontal bristles on each side in a single row, descending in the male to the

root of the antenne, in the female somewhat lower; vibrisse inserted nearly at the oral margin and

surmounted by some shorter bristles. Antenne shorter than the face, black, the basal joints rufous in

the male; third joint three times as long as the second; arista thickened in its proximal half. Proboscis

(or at least its terminal lips) and palpi rufous. Thorax and scutellum greyish-cinereous ; thoracic dorsum

with four black stripes, which are linear in the male and broader in the female, the outer ones interrupted

at the transverse suture, Abdomen nearly cylindrical ( ¢) or subconical (9 ), yellow, and transparent ;

first segment as long as the following one; in the male the black dorsal stripe is narrow and somewhat

extended on the hind borders of the first and second segments, and the hind border of the third segment

is wholly black ; in the female the dorsal stripe is broader and the black hind border of the third segment

narrower ; the front margins of the segments with white reflections, which are more distinct in the

female ; anus rufous in both sexes ; macrochete rather long, only on the hind margins of the segments.

Legs piceous, the cox grey; bristles weak ; hind tibie outwardly with four equidistant bristles, in the

female also with a row of short bristles; foot-claws and pulvilli a little elongate in the male, at least

those of the first pair, the pulvilli yellowish. Tegule yellow (¢) or whitish (2). Wings grey, in the

male with some brownish tint; small cross-vein on the middle of the discal cell ; curvation of the fourth

vein with a blunt angle; apical and posterior cross-veins very slightly curved.

Hab. Mexico, Amula 6000 feet, Xucumanatlan 7000 feet, Omilteme 8000 feet and

Sierra de las Aguas Escondidas 9500 feet, all in Guerrero (H. H. Smith).

Several specimens of both sexes.

6. Myobia argenticeps, sp. n., 2.

Thorax cinereous, with black stripes; scutellum ochraceous; abdomen yellow, transparent, with grey reflec-

tions, the segments with a black dorsal stripe anda black hind border; no discal macrochete ; head

whitish, with silvery reflections ; antenna, proboscis, palpi, and legs rufous.

Length 7 millim.

Front as broad as the eyes, silvery-white, with parallel sides; vertex somewhat ochraceous ; frontal band

blackish, linear; frontal bristles stout, but few in number, three of them descending beneath the root of

the antenne ; face and cheeks silvery-white, the cheeks narrow; vibrissee inserted at the oral margin ;

eyes large, descending to the inferior part of the head. Antenne reaching to near the vibrisse, rufous ;

third joint four times as long as the second, slightly infuscated ; arista scarcely thickened at the base.

Proboscis and palpi pale rufous, the proboscis short. Thorax yellowish-cinereous, with four blackish

136 ; DIPTERA.

stripes—the intermediate ones linear, the outer ones interrupted at the transverse suture; scutellum

ochraceous, with the base blackish ; pleuree whitish-grey. Abdomen ovate; first and second segments

yellow and transparent, with some greyish reflections and a blackish dorsal stripe, which on the second

segment is extended to a blackish hind border; on the third and anal segments the grey tomentum is

more intense, the dorsal stripe disappears, and only a black hind border is conspicuous ; on the sides of all

the segments are white reflections ; ventral surface yellow, with a grey tomentum ; rather long macrochate

are on the hind margins of the second and following segments. Legs rufous, the coxe with whitish-grey

reflections, the tibiee brownish, the tarsi black; middle tibiee outwardly with a long bristle; hind tibie

outwardly with short bristles and a longer one in the middle. Tegule white. Wings grey, the colour

more intense at the end of the costa and along the third vein; small cross-vein on the middle of the

discal cell; apical cross-vein nearly straight ; posterior cross-vein slightly undulate.

Hab. Mexico, Dos Arroyos in Guerrero 1000 feet (H. H. Smith).

A single female specimen.

7. Myobia opima, sp. n., 3 2.

Cinereous ; abdomen rufous, with a blackish dorsal stripe; antennee, palpi, and legs rufous, the third antennal

joint brown or black, the tarsi black ; no discal macrochete on the abdominal segments.

Length 8 millim.

Front cinereous, nearly as broad as the eyes, in the female broader ; frontal band black, in the male narrowed

towards the vertex; frontal bristles on each side in a single row, reaching as far as the end of the first

antennal joint; face and cheeks white; vibrisse inserted at some distance above the oral margin, which

is a little prominent ; cheeks rather broad; eyes not descending to the vibrisse. Antenne rufous; third

joint (except at the base) brownish or black, twice as long as the second; arista black, microscopically

pubescent, slightly thickened at the base. Proboscis black, long and slender; palpi rufous, brown at the

tip in the female, cylindrical, rather long. Thoracic dorsum with two blackish lines before the trans

verse suture and an obsolete, interrupted, blackish lateral stripe; scutellum yellowish-cinereous, somewhat

ochraceous. Abdomen conical, rufous, with white reflections, which sometimes appear as a white front

margin to the segments; the blackish dorsal stripe is usually conspicuous only on the first two segments

(in same of the specimens the third segment shows some blackish reflecting spots); on the hind margin

of the first segment are two lateral macrochetz (one on each side), on that of the second segment are two “

dorsal macrocheete and one on each side, and on that of the third and anal segments is a row of macro- :

chetz. Ventral surface with white front borders to the segments and with a black median stripe. Legs

rufous, the tarsi black (in most of the specimens the tibize are brown); front femora with a row of

bristles on the upper- and undersides; middle and hind femora with bristles only on the underside ;

front tibie outwardly with some short bristles ; intermediate tibiee with two longer bristles at the middle,

one on the outer and one on the inner side; hind tibie with several bristles of unequal length ; foot-

claws and pulvilli elongate in the male, the pulvilli yellowish-grey. Tegule whitish. Wings hyaline,

sometimes yellowish along the costa; curvation of the fourth vein with a blunt angle; small cross-vein

nearly under the end of the first vein, and on the middle of the discal cell; apical and posterior cross-veins

oblique, the apical nearly straight, the posterior slightly curved.

Hab. Mexico, Hacienda de la Imagen 4000 feet and Amula 6000 feet, both in

Guerrero, Cuernavaca in Morelos (H. H. Smith).

Several male and two female specimens.

8. Myobia angulata, sp. n., 2.

Cinereous ; four thoracic stripes and hind borders of the abdominal segments black; frontal band and legs

brown; the knees and the antenne rufous; third antennal joint elongate, as long as the second; curva-

tion of the fourth vein with a right angle.

Length 8 millim.

MYOBIA. 137

Greyish-cinereous. Head whitish; front slightly prominent, distinctly broader than the eyes; frontal band

dark brown, narrower than the lateral portions ; frontal bristles few in number, two or three of them

beneath the root of the antenne; face a little inclined; cheeks broad; eyes not descending to the

vibrissee, which are inserted on the oral margin. Antenne rufous, much shorter than the face; second

joint elongate, bristly; third joint as long as the second, somewhat infuscated towards the tip; arista

black, thickened in its proximal half. (The proboscis and palpi are retracted in the oral cavity, the

former is apparently black and the latter seem to be rufous.) The stripes on the thoracic dorsum are

interrupted at the transverse suture; the intermediate ones are linear and the outer ones in the form of

small trigonal spots. Abdomen conical ; first segment a little shorter than the second; the black hind

borders are rather narrow, those of the second and third segments being interrupted at the middle; the

anus is slightly rufous; long macrochete are on the hind margin of the second and following segments.

Legs brown, the coxe and part of the femora with grey tomentum; the knees and the underside of the

femora towards the tip rufous; front tibise with short, the middle and hind tibie with longer bristles.

Tegule whitish. Wings greyish-hyaline, somewhat brownish along the costa; small cross-vein on the

middle of the discal cell; curvation of the fourth vein with a right angle; apical cross-vein concave ;

posterior cross-vein slightly curved.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single female specimen.

9. Myobia diadema. (Tab. IV. fig. 2.)

Dexia diadema, Wiedem. Aussereur. zweifl. Ins. ii. p. 882. no. 24°.

Head yellowish-white ; front in the male not so broad as the eyes and still narrower behind, in the female

somewhat broader ; frontal band narrow, black or brownish-black ; frontal bristles weak, not descending

beneath the root of the antenne ; vibrissee inserted at a little distance above the oral margin, which is

very slightly prominent. Antenne rather slender; basal joints rufous; third joint not fully three times

as long as the second, brown or blackish, with a rufous base, sometimes almost wholly of the latter

colour ; arista pubescent, thin, scarcely thicker in its proximal half. Proboscis long and slender, shining

black, rufous towards the tip; palpi pale rufous, slightly thickened, sometimes a little infuscated at the

tip. Thorax covered with a greyish or yellow tomentum, sometimes with indications of dark lines;

pleurs whitish-grey ; scutellum rufous. Abdomen—of the male elongate-conical, yellowish-rufous, slightly

transparent ; on the hind margin of the second and third segments a small trigonal black dorsal spot; in

most specimens the third and anal segments have laterally a similar spot, in others the third segment has

a narrow black hind margin ; the black markings are more or less distinct, but seldom totally absent ;

sometimes a white reflection appears on the front margins of the segments ; the macrochete are few in

‘number and only on the hind margin of the second and following segments ;—of the female more

elliptical, of the same colour, but usually less transparent, and with similar black markings and macro-

chete. Legs rufous, the tarsi black, the hind tibie brown; the front tarsi in the male twice, in the

female one and a half times as long as the tibie ; bristles proportionately short and weak ; foot-claws and

pulvilli elongate in the male, very short in the female, the pulvilli yellow. Tegule yellowish. Wings in

the male in most examples much longer than the abdomen, greyish-hyaline, usually with a dilute brownish

tint at the end of the second vein; curvation of the fourth vein with a blunt angle; apical cross-vein a

little concave, sometimes nearly straight ; posterior cross-vein sinuous.( ¢ ) or very slightly curved (9 ).

The specimens are very variable in size (5-9 millim. in length); the males are usually larger (6°5 millim. or

more) than the females (5-6 millim.), but this is not a general rule.

Hab. Mexico, Amula 6000 feet and Xucumanatlan 7000 feet, both in Guerrero,

Cuernavaca in Morelos, Atoyac and Medellin in Vera Cruz, Teapa in Tabasco (#. 4.

Smith), Temax in North Yucatan (Gaumer) ; Costa Rica, Cache (Rogers).—Braziu !.

This species seems to be very common in Central America, whence we have received

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1890. t

138 DIPTERA.

a large series of examples, including both sexes. Some of them differ a little from

the others, and I have given here a renewed description to include these. Amongst

the numerous specimens, there are some which might be regarded as belonging to a

distinct species; but as many transitions are to be found, I think we have here to do

with varieties of the same specific form. |

The following two species are closely allied to M. diadema ; the characters separating

them from it are, however, of such a nature as to indicate that they are really distinct.

10. Myobia longipalpis, sp. n., ¢.

Pale rufous; face and cheeks white; abdomen with black dorsal spots and lateral points; palpi long and

exserted ; third vein with a row of bristles.

Length 6 millim.

Front broader than the eyes, pale rufous, the frontal band inconspicuous ; frontal bristles on each side in a

single row, scarcely descending beneath the root of the antenne ; eyes not reaching to the vibrisse ;

cheeks broad. Antenne rufous; second joint with a short bristle ; third joint three times as long as the

second, infuscated towards the tip; arista thickened in its proximal half, microscopically pubescent.

Proboscis long and slender, pale rufous, more obscure towards the tip, the terminal lips black; palpi

rufous, cylindrical, long, and stretched out beyond the oral margin, the tip with short black hairs. Thorax

and scutellum ochraceous, the usual thoracic stripes almost obsolete; pleurse whitish. Abdomen ellip-

tical; the first two segments yellowish and transparent, the third and anal segments of a more rufous

colour ; on the hind margin of the second and third segments a black dorsal spot and a lateral point ;

macrocheete few in number, only at the hind margins of the segments and inserted in the black spots and

points ; anal segment with a black point on each side beneath. Legs pale rufous, the tarsi black ; tibie

with rather short and weak bristles. Tegule yellowish. Wings greyish-hyaline; third vein with a row

of short bristles extending from the base to the small cross-vein, the latter on the middle of the discal

cell; curvation of the fourth vein rounded ; apical cross-vein concave before its end ; posterior cross-vein

straight.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

Two female specimens.

11. Myobia flavipennis.

Dexia flavipennis, Wiedem. Aussereur. zweifl. Ins. ii. p. 380. no. 19°.

In general coloration and markings similar to M. diadema, but differing from it in the rufous frontal band and

the more convex shape of the abdomen. The front is broader, especially in the male; the frontal band

is at least as broad as the lateral portions; the antenne are longer, the third joint less infuscated and

nearly four times as long as the second; the arista is still more distinctly pubescent or shortly plumose.

The abdomen is convex, ovate in both sexes, and of a more opaque rufous colour, with black dorsal spots ;

laterally it has some white or yellowish reflections ; the anal segment is sometimes infuscated. The front

tibie of the male are longer and the tarsi proportionately shorter. The third vein (which is not bristly)

is curved at its end, the apical cross-vein a little concave, the posterior cross-vein nearly straight.

Length 7-9 millim. . |

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).—Braziu }.

A male and several female specimens were captured by Mr. Smith at Amula.

The description given by Wiedemann (J. c.) seems to be sufficiently applicable to the

Mexican examples before me.

POLYGASTER. 139

The following species characterized by M. Bigot, and referred by him to the genus

Viviana, Rond. (one of them, however, with doubt), are perhaps best placed here :—

Viviana (2) rufopygata, Bigot, Aun. Soc. Ent. Fr. 1888, p. 262. n. 46.—Mexico.

citrina, Bigot, 1. c. n. 47.—Mexico.

I may state that the genus Viviana, Rond. (Dipt. Ital. Prodr. iv. pp. 48 & 53), is closely

allied to Myobia, and that its species have no discal macrochete on the abdominal

segments and the antenne inserted above the median line of the eyes.

POLYGASTER, gen. nov. *

Head hemispherical, broader than the thorax; front a little prominent, as broad as the eyes ; frontal bristles

robust, not descending beneath the root of the antenne; face slightly retracted ; two strong vibrissw

inserted at the oral margin, these directed downwards, the oral margin not prominent. Antenne as

long as the face; basal joints short; third joint four times as long as the second, somewhat convex on

the front side; arista pubescent. Proboscis exserted; palpi filiform. Thorax elongate-quadrangular ;

scutellum with two strong macrochete on the hind margin. Abdomen cylindrical, narrower towards

the anus; the first and the anal segments shorter than the second or third, the latter each bearing a pair

of marginal (but no discal) macrochete ; anal segment with macrochetw only on the underside. Legs

rather elongate. Wings as long as the abdomen, without a costal spine; first and third veins short-

haired over nearly their whole length ; curvation of the fourth vein angular, but without appendage ;

apical cell opened at the wing’s tip; posterior cross-vein perpendicular, beyond the middle between the

small cross-vein and the curvation of the fourth vein.

1. Polygaster egregia, sp.n., 2. (Tab. IV. figg. 3; 34, head in profile.)

Shining black ; first and second abdominal segments yellow and transparent, with a black dorsal band ; head

and reflections on the thorax and abdomen white ; wings brownish, more intensely so towards the costa.

Length 8 millim.

Head white, somewhat silvery ; frontal band black, as broad as the lateral portions. Antenne black ; arista

thickened nearly to the middle. Proboscis black ; the terminal lips and the palpi pale rufous. Thorax

shining black, anteriorly and at the sides with a snow-white tomentum, and with two longitudinal black

bands, between which (anteriorly) are two black lines; scutellum black. First and second segments

yellowish and transparent, the first black at the base and each with a black dorsal stripe, which is

slightly enlarged at the hind margin of the second segment ; the two hinder segments shining black, each

with a trigonal white spot at the side. Legs black, the cox with whitish tomentum ; the tarsi pro-

portionately thin; bristles weak ; foot-claws and pulvilli short. Tegule white. Wings brownish, darker

along the costa, especially between the end of the auxiliary and the second veins; first and third veins

with a row of short bristles, reaching to beyond the small cross-vein, the latter on the middle of the

discal cell; curvation of the fourth vein with a blunt angle; apical cell rather narrow; posterior cross-

vein nearly straight.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

* sodvs (long), yaorjp (abdomen).

t 2

“ena

140 DIPTERA.

HYPOSTENA.

Hypostena, Meigen, System. Beschr. europ. zweifliigl. Ins. vii. p. 239. 39 (1838).

As characterized by its author, this genus is not clearly defined. This may be

proved by the following statements :—

1. According to the description (J. ¢.) and figure (tab. 71. f. 5), its species, especially

H. procera, Meig., should have no discal macrochete on the abdominal segments

. (Schiner, Fauna Austriaca, Dipt. i. p. 537, however, has amended this, as Tachina

cylindracea, Zett., which is considered by him as identical with H. procera, shows

discal as well as marginal macrochete).

2. In the analytical table (/. c. p. 178) Hypostena is enumerated among the genera

with the apical cell opened, which is conformable with fig. 1 of tab. 71; but in the

description of the genus (/. c. p. 239), Meigen says: “ Mittelzelle (apical cell) an der

Fliigelspitze geschlossen, stiellos.”

In general, we may say that the species of the genus Hypostena, in common with

those of Myobia and Polygaster, have a Dewxia-like aspect owing to the cylindrical or

conical shape of the abdomen and the elongate legs. The apical cell is narrowly

opened near the wing’s tip; the eyes are bare (in H. obwmbrata, ¢, microscopical

pubescent); the third joint of the antenne is three or more times as long as the second;

and the arista (except in H. concinna) is usually without pubescence.

Several species from Central America apparently belong to Hypostena, and they may

be distinguished as follows :—

1. Abdominal segments with discal and marginal macrochete . 2.

Abdominal segments with marginal macrochete only . . . 17.

2. Cheeks broad, the eyes not descending beneath the tip of the

antemne ... . soe ee 3.

Cheeks narrow, the eyes descending to near the lowest part of

thehead . . 2... . ~ ee ew 18,

3. Thoracic dorsum with two broad black bands wee ew ww

Thoracic dorsum with four black stripes. . . . . . . . 6.

4, Palpiblack . 2. 2. 1. 1 1 ww 1 ew ww... leucophea, v. a. Wulp.

Palpirufous. . . 2. 2... eee OB

5, Aristabare . 2... . 2 1 1 we ww... . Blandita, v. d. Wulp.

Arista pubescent . . . . - + concinna, v. d. Wulp.

6. Pale ochraceous; the abdomen with a black dorsal stripe, 1 narrow

black hind borders to the segments, and a yellowish pile . elegans, v. d. Wulp.

Blackish ; the abdomen with white or yellow portions, but the

black colour always prevailing, and the hairs black . . . 7,

7. Abdomen laterally yellow and transparent . . . . . obumbrata, v. d. Wulp.

Abdomen neither transparent nor yellow, at the most with

some rufous or yellowish tint on the sides of the second and

thirdsegments . . . . . . .

10.

ll.

12.

13.

14.

15.

16.

17.

18.

HYPOSTENA.

. Abdomen with greyish and black reflections .

Abdomen with well-defined whitish or yellowish front borders

to the segments .

. Coxe and base of the antennz rufous

Antenne and legs entirely black woe

The interspaces between the two median thoracic stripes broader

than those between the median and outer stripes

The thoracic stripes at equal distances from each other .

Third vein curved upwards before its end

Third vein nearly straight

Shining black, with yellowish or white front borders ‘to ‘the

abdominal segments .

Grey, with black borders to the abdominal segments

Legs and basal part of the antenne yellowish .

Legs and antenne wholly black .

Third vein bent upwards before its end, the apical cell thus

distinctly broader than the discal cell . .

Third vein straight or nearly straight, the apical cell not broader

than the discal cell .

Abdomen flattened .

Abdomen convex

Palpi black .

Palpi rufous, at least at the tip . . .

Abdomen shining black, with two whitish bands .

Abdomen black, with three white or cinereous bands

Ground-colour of the thorax grey; front borders of the abdo-

minal segments white . . .

Ground-colour of the thorax ochraceous ;

abdominal segments cinereous

front borders of the

1. Hypostena leucophea, sp. n., ¢ ¢.

Whitish-grey ; frontal band, two broad bands (and behind them a large spot) on the thorax, scutellum, large

hind borders to the abdominal segments, antenne, palpi, and legs black ; wings brownish.

Length 6°5 millim.

Front scarcely narrower (¢) or a little broader (2) than the eyes ;

141

pilosa, v. d. Wulp.

umbripennis, v. d. Wulp.

10.

11.

12.

melaleuca, v. d. Wulp.

cylindriventris, v.d. Wulp.

quadristriata, v. d. Wulp.

turbinata, v. d. Wulp.

strigosa, v. d. Wulp.

14.

flavocalyptrata, v.d.Wulp.

15.

deplanata, v. d. Wulp.

16.

immunda, v. d. Wulp.

minima, v. d. Wulp.

albocingulata, v. d. Wulp.

18.

subtilis, v. d. Wulp.

nubilosa, v. d. Wulp.

frontal band broader than the lateral

portions ; frontal bristles on each side in a single row, descending as far as the end of the second antennal

joint ; face and cheeks white ; vibrisse inserted a little above the oral margin ; eyes descending as far as

the tip of the antennz ; beard white. Antenne shorter than the face; second joint bristly ; third joint

three times as long as the second ; arista thickened not quite to the middle. Proboscis and palpi black.

Thorax whitish-grey ; thoracic dorsum before the transverse suture with two broad black bands, each of

which is indistinctly divided into two stripes ; behind the suture a large black spot, reaching neither the

sides nor the hind margin. Abdomen conical (¢) or more ovate (9), whitish-grey ; first. segment as

long as the following, almost wholly black; the black hind border of the second and third segments

extended anteriorly in the middle ; the second and following segments densely beset with long discal and

marginal macrochets. Legs long and slender; middle and hind tibie with several long bristles; foot-

claws and pulvilli elongate in the male, the pulvilli yellowish; the front tarsi, except the basal joint,

slightly but distinctly dilated in the female. Tegule yellow. Wings with a brownish tint, which is

142 _ DIPTERA.

more intense towards the costa ; small cross-vein on the middle of the discal cell ; curvation of the fourth

vein with a blunt, more or less rounded angle ; apical cross-vein straight ( 3) or slightly concave towards

the end (2); posterior cross-vein in both sexes nearly straight.

Hab. Mexico, Omilteme 8000 feet and Sierra de las Aguas Escondidas ‘9500 feet,

both in Guerrero (H. H. Smith).

Five male and two female specimens.

2. Hypostena blandita, sp.n.¢ 9. (Tab. IV. figg. 4; 4a, head in profile.)

Whitish-grey or pale ochraceous ; head white; frontal band and antenne black; palpi rufous; thorax with

two broad black bands; scutellum black, with a light tip; abdomen with large trigonal black dorsal

spots ; legs black ; wings brownish.

Length 8-12 millim.

Front somewhat prominent—in the male much narrower, in the female broader, than the eyes, in the male

almost wholly occupied by the black band, the latter in the female narrower than the lateral portions ;

frontal bristles on each side in a single row, descending to beneath the second antennal joint; face

retracted ; eyes descending not quite so far as the end of the antenne; above the vibrisse some weak

bristles in a small groove. Antenne a little shorter than the face; second joint bristly ; third joint four

times as long as the second. The black thoracic bands prolonged behind the transverse suture, but not

fully reaching the hind margin of the thorax ; scutellum velvety-black, with a yellowish or whitish point

at the tip. Abdomen conical; first segment as long as the following ; the black dorsal spots, one on each

segment, extending to the hind margins; the second and third segments have many discal and marginal

macrochete. Legs long and slender; middle and hind tibie with rather long bristles ; foot-claws and

pulvilli elongate in the male, the pulvilli obscure; the front tarsi not dilated in the female. Tegule

greyish-yellow. Wings long and narrow, dilute brownish, this colour more intense towards the costa ;

small cross-vein a little before the middle of the discal cell; curvation of the fourth vein with a blunt

angle ; apical cross-vein straight (¢) or somewhat concave ( 2); posterior cross-vein distinctly curved.

Hab. Mexico, Xucumanatlan 7000 feet, Omilteme 8000 feet, and Sierra de las Aguas

Escondidas 9500 feet, all in Guerrero (H. H. Smith), Orizaba (H. H. Smith & F. D. G.);

Costa Rica, Rio Sucio (Rogers).

One female and several male specimens.

This fine species much resembles the preceding; but differs in its larger size, the

more prominent front (¢ ), the rufous palpi, the black thoracic bands extending nearly

over the whole thorax, and the curved posterior cross-vein.

3. Hypostena concinna, sp. n., c. |

Yellowish ; head white ; frontal band, two broad bands on the thorax, hind borders and a dorsal stripe on the

abdominal segments, antenne, and legs black; palpi rufous; wings brownish.

Length 7:5 millim.

Closely allied to both the preceding species; the front, however, is less prominent, narrower than the eyes

and posteriorly wholly occupied by the black frontal band. The antenne are shorter; the arista propor-

tionately longer and somewhat pubescent. The vibrisse are inserted as in H. leucophea, and higher than

in H, blandita. The black thoracic bands are very broad and of a somewhat irregular form. The

abdomen has the yellowish portions more transparent ; the black markings consist of a dorsal stripe

and a hind border to the segments, the black hind borders not fully reaching the sides; the black

colour of the first segment is restricted to the middle. The legs are thinner, the tarsi longer ; the bristles

weak. The small cross-vein is on the middle of the discal cell; the apical and posterior cross-veins are

slightly curved.

HYPOSTENA. 143

Hab. Mexico, Amula 6000 feet and Xucumanatlan 7000 feet, both in Guerrero

(H. H. Smith).

A male specimen from each locality.

4, Hypostena elegans, sp. n., ¢.

Whitish-grey ; frontal band, four thoracic stripes, hind borders and a dorsal stripe on the abdominal segments,

antenne, and legs black; palpi rufous; abdomen pale ochraceous, laterally and on the underside with

yellowish hairs.

Length 10°5 millim.

Head white, with grey reflections; front prominent, narrowed behind and there not so broad as the eyes ;

frontal band brownish-black, sometimes rufous anteriorly ; frontal bristles rather short, on each side in a

single row, descending as far as the end of the second antennal joint; face slightly inclined ; vibrisse

inserted a little above the oral margin and accompanied by several short bristles; eyes descending as far

as the end of the antennw; beard white. Antenne shorter than the face; basal joints sometimes more

or less rufous ; second joint with some short and rough bristles ; third joint narrow, four times as long

as the second; arista slightly thickened at the base. Proboscis, at least its terminal lips, and palpi

rufous. Thorax and scutellum whitish-grey; the four black stripes on the former interrupted at the

transverse suture; base of the scutellum black. Abdomen conical, pale ochraceous ; all the segments

with a narrow black hind border and a blackish dorsal stripe ; the first segment shorter than the second ;

abdominal dorsum with many discal and marginal macrochete and black hairs; sides and ventral surface

with yellowish pile. Legs slender, with weak bristles ; hind tibie outwardly with some long bristles;

foot-claws and pulvilli slightly elongate. Tegule and wings greyish-hyaline; the costa with some

brownish tint; small cross-vein nearly on the middle of the discal cell; apical cross-vein straight ;

posterior cross-vein slightly curved.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

Three male specimens.

5. Hypostena obumbrata, sp. n., ¢ ¢.

Greyish ; frontal band, antenne, four stripes on the thorax, hind borders of the abdominal segments, and legs

black ; abdomen laterally yellow, transparent ; palpi rufous. .

Length 7 millim. bo.

Head whitish-grey ; front in both sexes narrower than the eyes; frontal band broader than. the lateral

portions ; frontal bristles descending as far as the end of the second antennal joint ; cheeks rather broad ;

the eyes descending as far as the tip of the antenne ; beard and posterior orbits white. Antenne shorter

than the face ; second joint bristly ; third joint three ‘times as long as the second ; arista thickened to

less than the proximal half. Proboscis black, its terminal lips and the palpi rufous. Thoracic dorsum

with four black stripes, which are usually less distinct behind the transverse suture, where sometimes the

surface is black; scutellum grey, blackish at the base, or almost’ wholly black. Abdomen conical, later-

ally yellow and transparent ; first segment, except the lateral portions, black ; second and third segments

with broad black hind margins, in the middle black with grey reflections; anal segment greyish ; discal

and marginal macrochete present ; ventral surface rufous, with grey reflections and a black median stripe.

Legs black ; hind tibiee with several short and some long bristles ; foot-claws and pulvilli elongate in

the male, the pulvilli yellow. Tegule yellowish. Wings yellowish-brown, greyish-hyaline towards the

hind margin; small cross-vein on the middle of the discal cell; apical cell very narrowly opened ; curva-

tion of the fourth vein with a blunt angle; apical and posterior cross-veins oblique, the latter slightly

curved.

144 DIPTERA.

Hab. Mexico, Amula 6000 feet and Omilteme 8000 feet, both in Guerrero, Atoyac

in Vera Cruz (H. H. Smith).

Several male and two female specimens.

6. Hypostena pilosa, sp.n.,¢. (Tab. IV. fig. 7, wing.)

Black; face and sides of the front yellowish; thorax greyish, with four black stripes; abdomen with greyish

reflecting spots; wings hyaline.

Length 8 millim.

Head yellowish ; front posteriorly narrower than the eyes ; frontal band black, as broad as the lateral portions ;

frontal bristles descending as far as the end of the second antennal joint; the bristles on the vertex

longer and stouter than those on the front; cheeks rather broad ; beard and pile of the occiput whitish ;

vibrissz inserted at some distance above the oral margin, and accompanied by many other bristles.

Antenne black ; second joint bristly ; third joint three times as long as the second ; arista thickened in

its proximal half. Palpi black, hairy. Thorax anteriorly and laterally with some greyish-white

tomentum ; the four black stripes distinct only before the transverse suture; scutellum black. Abdomen

conical, densely haired, black, with greyish reflecting spots, which usually appear on the front border of

the second and following segments; many discal and marginal macrochete are present. Legs black,

slender, bristly ; hind tibie slightly curved, with several long bristles on the outer and inner sides; foot-

claws and pulvilli elongate, the pulvilli blackish. Tegule brownish. Wings greyish-hyaline; curvation

of the fourth vein with a blunt angle; small cross-vein nearly on the middle of the discal cell; apical

and posterior cross-veins oblique, nearly straight, the posterior sometimes slightly curved.

Hab. Mexico, Amula 6000 feet and Xucumanatlan 7000 feet, both in Guerrero,

Cuernavaca in Morelos (1. H. Smith).

Four male specimens.

7. Hypostena umbripennis, sp. n., ¢.

Yellowish-grey ; frontal band, four stripes on the thorax, and the hind borders of the abdominal segments

black ; antennz black, somewhat rufous at the base; legs black, the coxe rufous; palpi and terminal

lips of the proboscis yellow ; wings infuscated towards the end of the costa.

Length 7 millim.

Front not prominent, narrower than the eyes; frontal band as broad as the lateral portions; frontal bristles

weak, descending as far as the end of the second antennal joint; cheeks moderately broad, the eyes

descending a little beyond the tip of the antenne; vibrisse inserted at some distance above the oral

margin. Antenne shorter than the face; second joint bristly; third joint four times as long as the

second ; arista thickened to less than the proximal half. The two median stripes on the thorax are

linear, the two outer ones broader and interrupted at the transverse suture; scutellum black, with the

hind margin grey. Abdomen conical, rather convex; first segment black, laterally yellowish; the

following segments grey (laterally yellowish), with broad black hind borders, the anterior edges of which

are undulate; the second segment shows a black dorsal line; discal and marginal macrocheete are

present. Hind tibie outwardly with a row of short bristles and with two pairs of longer bristles (a pair

below the middle and another before the apex); foot-claws and pulvilli elongate, the pulvilli yellowish.

Tegule greyish. The brownish coloration of the wings is most obscure on the costa beyond the first

vein, and becomes more dilute towards the wing’s tip and the hind margin; small cross-vein a little

before the middle of the discal cell; apical cross-vein very slightly curved ; posterior cross-vein more

distinctly curved.

fab. Muxico, Teapa in Tabasco (H. H. Smith).

A single male specimen.

HYPOSTENA. 145

8. Hypostena melaleuca, sp.n., ¢. (Tab. IV. fig. 6, wing.)

Black ; face whitish; thorax with whitish tomentum and four black stripes ; the front border of the second

and following abdominal segments whitish ; wings brownish.

Length 5°5 millim.

Front a little prominent, narrower than the eyes; frontal band black, much broader than the lateral portions ;

frontal bristles descending as far as the end of the second antennal joint ; face slightly inclined; oral

margin pilose; beard whitish. Antenne black, much shorter than the face; third joint three times as

long as the second ; arista thickened to one third of its length. Palpi black. The black stripes on the

thorax are broad, the interspaces between the median and outer stripes narrower than that between the

two median; behind the transverse suture all four stripes disappear in the general black colour of the

disc; the light tomentum on the pleure forms irregular spots; scutellum black, with a whitish tip.

Abdomen subconical; the whitish front borders of the second and third segments occupying nearly the

basal third and rather distinctly limited; anal segment greyish-white, black at the tip; discal and

marginal macrochate are present; the underside and the anus are clothed with long hairs. Legs black,

moderately long ; hind tibie: outwardly with several bristles, four of them (two below the middle and two

before the apex) being longer than the others; foot-claws and pulvilli elongate. Tegule yellowish-grey.

Wings brownish, more dilute towards the posterior margin; third vein slightly bent upwards before its

end; curvature of the fourth vein rounded; small cross-vein on the middle of the discal cell ; apical and

posterior cross-veins slightly curved.

Hab. Muxico, Teapa in Tabasco (H. H. Smith).

A single male specimen.

9. Hypostena cylindriventris, sp.n., ¢ ¢.

Black ; thorax, at least anteriorly and laterally, cinereous, with four black stripes; the front border of the

second and following abdominal segments yellowish or white; palpi rufous; wings brownish towards

the costa.

Length 5°5-7°5 millim.

Of a slender shape. Front of the male slightly prominent, narrower than the eyes, and wholly occupied by

the black frontal band,—that of the female as broad as the eyes, laterally whitish ; frontal bristles on

each side in a single row, descending as far as the end of the second antennal joint; face whitish, some-

what inclined ; vibrisse: inserted a little above the oral margin and surmounted by some shorter bristles ;

beard white. Antenne distinctly shorter than the face; third joint narrow, three or four times as long

as the second; arista thickened to near the middle. Proboscis black, its terminal lips and the palpi

rufous. Thoracic dorsum in the male black, before the transverse suture cinereous with four black

stripes, of which the outer ones are the broadest ;—in the female more generally cinereous, the stripes

more conspicuous and also distinct behind the suture ; pleure greyish; scutellum black. Abdomen

elongate-conical, black ; second and third segments with white or yellowish-white front borders, which

in the middle are narrower; many long discal and marginal macrochzste are present, and in the male

the ventral surface is beset with long black hairs. Legs black, long and slender ; posterior tibiee with

some long bristles ; foot-claws and pulvilli elongate in the male, the pulvilli yellowish. Tegule yellowish

(dé) or whitish (9). Wings greyish-hyaline, brownish towards the costa ; small cross-vein before the

middle of the discal cell; curvature of the fourth vein with a blunt angle; apical cross-vein nearly or

quite straight ; posterior cross-vein more or less curved.

Hab. Mexico, Sierra de las Aguas Escondidas 7000 feet and Omilteme 8000 feet,

both in Guerrero (H. H. Smith).

Three male and two female specimens.

BIOL. CENTR.-AMER., Dipt., Vol. IL., June 1890. a u

146 DIPTERA.

10. Hypostena quadristriata, sp. n., ¢. (Tab. IV. figg. 5; 5a, head in

profile.) |

Shining black; sides of the front, thorax, scutellum (except its base), and front borders of the abdominal

segments pale ochraceous; thoracic dorsum with four black stripes; antennz and legs black; palpi

rufous.

Length 7 millim.

Front much narrower than the eyes; frontal band black, narrowed behind ; frontal bristles descending as far

as the end of the second antennal joint; face perpendicular, yellowish-grey ; cheeks rather broad, the

eyes not descending beneath the tip of the antennex ; occiput dark grey, along the hind borders of the

eyes with yellow reflections. Antenne shorter than the face; second joint bristly; third joint three

times as long as the second; arista thickened in its proximal third. Thorax with a pale ochraceous

tomentum and four black stripes, which are very distinct before the transverse suture; scutellum with

the base black, the apical half pale yellow. Abdomen subcylindrical, shining, black or blackish-brown ;

the second and following segments with a pale yellow front border and long discal and marginal macro-

cheetze. Legs rather long and slender; the bristles not very strong, those on the underside of the front

femora the longest; foot-claws and pulvilli elongate and surrounded by bristly hairs. Tegule pale

ochraceous. Wings greyish, the base and costa slightly infuscated ; third vein somewhat bent upwards

near its end; curvature of the fourth vein with a blunt angle; small cross-vein a little before the middle

of the discal cell ; apical cross-vein straight ; posterior cross-vein distinctly curved.

Hab. Costa Rica, Volcan de Irazu 6000 feet (Rogers).

One male specimen.

11. Hypostena turbinata, sp. n., ¢.

Grey ; face and sides of the front whitish ; frontal band, antennae, four stripes on the thorax, hind borders of

the abdominal segments, and legs black ; palpi rufous.

Length 5-5 millim.

Front posteriorly narrower than the eyes; frontal band as broad as the lateral portions; frontal bristles

descending a little beneath the end of the second antennal joint; cheeks rather broad, the eyes not

descending beneath the tip of the antenne; vibrisse inserted nearly at the oral margin. Antenne

shorter than the face; third joint three or four times as long as the second; arista thickened in its

proximal half. The black stripes on the thorax distinct only before the transverse suture; scutellum

black at the base. Abdomen flattened at the sides; first segment black; the following segments grey,

with broad black hind borders, which occupy more than half the length of each segment; second

segment at the sides of a somewhat yellowish-rufous colour ; long macrochete on the disc and on the

hind margin of each segment. Hind tibie outwardly with a pair of bristles at the middle and a pair

just before the apex; foot-claws and pulvilli elongate, the pulvilli yellowish. Tegule whitish. Wings

greyish-hyaline ; small cross-vein on the middle of the discal cell; curvature of the fourth vein with a

somewhat rounded angle; apical cross-vein nearly straight ; posterior cross-vein rather distinetly

curved.

Hab. Mexico, Medellin near Vera Cruz (H. H. Smith).

A single male specimen.

12. Hypostena strigosa, sp. n., ¢ 2.

Light grey ; thorax with four black stripes; antenne rufous, blackish towards the tip ; abdomen rufous,

with black hind borders to the segments and black discal points; legs rufous, the tarsi black ; palpi

yellow ; wings brownish.

Length 6°5-8 millim.

Face and cheeks white ; front yellowish, in both sexes narrower than the eyes ; frontal band black, linear ;

HYPOSTENA 147

frontal bristles descending as far as the root of the antenne; vibrisse inserted at some distance above

the oral margin ; eyes descending nearly to the inferior part of the head. Antenne shorter than the

face ; the two basal joints and the base of the third rufous, the latter for the rest blackish 3 second joint

bristly ; third joint three times as long as the second; arista pubescent, thickened at the base. Palpi

and terminal lips of the proboscis yellowish. Thorax whitish-grey ; the two median stripes linear and

more distant from each other than from the outer stripes ; scutellum grey, with the base black. Abdo-

men elongate-conical, yellowish-rufous, with whitish reflections, laterally transparent ; base of the first

segment black, the black coloration prolonged in a dorsal band; second and following segments with

black hind margins (in one specimen, if the insect is seen in another direction, the dorsal band disappears

in the white reflections, the black points, on which the discal macrochete are inserted, thus appearing

very conspicuous); macrochetz long; ventral surface with yellowish hairs. Legs rufous, including the

coxe, which have a whitish-grey tomentum ; tibia more obscure; hind femora brown at the tip; tarsi

black ; hind tibie slightly curved ; bristles weak ; foot-claws and pulvilli elongate in the male, the pulvilli

yellowish. Tegule greyish-yellow. Wings brownish; small cross-vein on the middle of the discal cell ;

curvature of the fourth vein nearly rectangular ; apical cross-vein slightly concave ; posterior cross-veim

rather distinctly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

One male and one female specimen. In its slender form and rufous coloration this

insect shows some affinity with Myodia; the third antennal joint is, however, more

elongate, and therefore the species is better placed here.

13. Hypostena flavocalyptrata, sp.n., 2. (Tab. IV. fig. 8, wing.)

Black ; face whitish ; thorax with grey tomentum and four black stripes; abdomen with three yellowish

bands; palpi rufous ; apical cell in the middle broader than the discal cell.

Length 8 millim.

Front a little prominent ; face inclined; vertex nearly as broad as the eyes; frontal band black, as broad. as

the lateral portions ; frontal bristles descending to beneath the end of the second antennal joint; cheeks

narrow, the eyes descending to the inferior part of the head. Antenne black, shorter than the face;

second joint very bristly ; third joint three times as long as the second ; arista thickened in its proximal

half. Palpi and terminal lips of the proboscis rufous. Thoracic stripes distinct only before the trans-

verse suture, the surface behind the suture being blacker in colour; scutellum black, with the hind

margin cinereous. Abdomen black, somewhat shining; front margins of the second and following

segments yellowish, this colour distinctly limited; discal and marginal macrochete present. Legs

black ; tibise with several long bristles ; foot-claws and pulvilli short. Tegule yellowish-grey. Wings

greyish-hyaline, brownish towards the base and costa; small cross-vein a little before the middle of the

discal cell; third vein bent upwards before its end, thus making the apical cell much broader than the

discal cell ; apical cross-vein nearly straight; posterior cross-vein curved inwards.

Hab. Costa Rica, Volcan de Irazu 6000 feet (fogers).

A single female specimen.

14. Hypostena deplanata, sp. n., ¢.

Black ; face and cheeks white ; thorax grey, with black stripes ; abdomen flattened, the anterior half of the

second and following segments grey; palpi and terminal lips of the proboscis rufous.

Length 7 millim.

Front a little prominent; face slightly inclined ; front ochraceous, narrower than the eyes, with nearly parallel

sides ; frontal band black, enlarged towards the root of the antennz ; frontal bristles descending as far as

the second antennal joint ; vibrissz inserted at a little distance above the oral margin. Antenne black ;

second joint bristly ; third joint slender, four times as long as the second ; arista thickened to one third

148 | DIPTERA.

of its length. The thorax (which in the single specimen before me is somewhat damaged by the pin)

seems to have four black stripes; scutellum black, with the lateral and hind border whitish-grey.

Abdomen subelliptical, flattened; first segment black, shorter than the following segments, which are

grey on the anterior and black on the posterior half, the colours being rather distinctly separated, the

grey portions, however, having sometimes a dark reflection ; discal and marginal macrochete present

and very long. Legs black ; hind tibie outwardly with several bristles, one of which (below the middle)

is longer than the others; foot-claws and pulvilli elongate. Tegule yellowish-grey. Wings greyish-

hyaline; small cross-vein a little before the middle of the discal cell; curvature of the fourth vein with a

blunt angle; apical cross-vein oblique, nearly straight ; posterior cross-vein distinctly curved.

Hab. Costa Rica, Rio Sucio (Rogers).

A single male specimen.

15. Hypostena immunda, sp. n., ¢.

Black, including the antenna, palpi, and legs ; face and sides of the front yellowish; thorax whitish, with four

black stripes; abdomen with greyish reflecting spots ; wings brownish.

Length 6-8 millim.

Closely allied to H. pilosa (antead, p. 144), but differing from it in the wings being brownish, especially on the

costa and along the veins; the posterior cross-vein is more curved; the cheeks are narrower, and the eyes

descend much lower; the thoracic stripes are distinct, even behind the transverse suture; the pile of the

abdomen is less dense; the bristles of the hind tibiee are much shorter; and the pulvilli are yellowish..

Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith).

Two male specimens.

16. Hypostena minima, sp. n., c.

Blackish ; head white; thorax anteriorly grey with four black stripes; abdomen shining black, with a whitish

front border to the second and following segments; palpi rufous, at least towards the tip; wings

brownish.

Length 4-6 millim.

Front not prominent, a little narrower than the eyes; frontal band black, as broad as the lateral portions ;

frontal bristles descending as far as the end of the second antennal joint; face perpendicular; cheeks

narrow, the eyes almost descending to the inferior part of the head; vibrisse inserted quite at the

oral margin. Antenne black, a little shorter than the face; third joint three or four times as long as the

second; arista thickened in its proximal third. Thorax black, anteriorly and at the sides with some

grey tomentum ; before the transverse suture are four black stripes at equal distances from each other ;

scutellum black, with grey tomentum. Abdomen conical, convex, shining black, with a white reflecting

spot at the front border of the second and following segments, the reflecting spots usually interrupted in

the middle by a black dorsal stripe; discal and marginal macrochete present; ventral surface brownish-

black, more or less with whitish incisions. Legs black; middle and hind tibisee with some rather long

bristles below the middle; foot-claws and pulvilli elongate, the pulvilli yellowish. Tegule yellowish-grey.

Wings brownish, more intensely so towards the costa and along the veins; small cross-vein on or a little

before the middle of the discal cell; apical cross-vein straight; posterior cross-vein slightly curved

inward.

Hab. Muxico, Teapa in Tabasco (H. H. Smith).

Three male specimens.

17. Hypostena albocingulata, sp. n., ¢.

Shining black; thorax grey, with four black stripes; head, pleurm, and two transverse bands on the abdomen

HYPOSTENA. 149

whitish; second and third abdominal segments without discal macrocheete ; palpi rufous ; wings infuscated

along the costa.

Length 8°5 millim.

Head white, somewhat silvery ; front as broad as the eyes; frontal band black, much broader than the lateral

portions; frontal bristles descending as-far as the end of the second antennal joint. Antennee black ; third

joint three or four times as long as the second; arista thickened in its proximal third. Thorax whitish-

grey, with four black stripes ; the interspaces between the median and outer stripes with dark reflections

(the thorax thus seeming to have two broad blackish bands) ; scutellum black, with some grey tomentum.

Abdomen subcylindrical, shining black ; the front border of the second and third segments snow-white,

this coloration laterally extended; macrochete long, only at, or a little before, the hind margin of the

segments. Legs black, with rather long bristles ; foot-claws and pulvilli elongate, the pulvilli yellowish.

Tegule white. Wings brownish, especially towards the costa ; small cross-vein a little before the middle

of the discal cell; third vein slightly bent upwards before its end; curvature of the fourth vein with a

blunt angle; apical and posterior cross-veins oblique and nearly straight.

Hab. Costa Rica, Cache (Rogers).

A single male specimen.

18. Hypostena subtilis, sp. n., ¢ 2.

Grey ; frontal band, four thoracic stripes, a broad hind border to the second and following abdominal segments,

antenne, and legs black; palpi rufous; no discal macrochate. .

Length 6-5—10°5 millim.

Front whitish, slightly prominent and narrowed behind in the male, as broad as the eyes in the female; frontal

band as broad as the lateral portions; frontal bristles on each side in a single row, descending as far as the

end of the second antennal joint; eyes descending as far as the tip of the antenne; face, cheeks, and

beard white. Antenne shorter than the face; second joint with some bristles; third joint narrow, four

times as long as the second; arista thickened not quite to the middle. Proboscis black, its terminal lips

and the palpi pale rufous, the palpi filiform. Thorax and scutellum light grey (¢) or cinereous (2); the

median thoracic stripes linear, the outer ones interrupted at the transverse suture. Abdomen conical ;

first segment black, as long as the second; the second and following segments shining black, with

whitish front borders, which in the male are laterally broader; the segments have long marginal macro-

cheetee; the anal segment (when viewed from the side) is truncated in the male, and has many macrochete.

Legs long and slender ; all the tibize with some long bristles; foot-claws and pulvilli elongate in the male,

the pulvilli yellowish. Tegule whitish. Wings greyish-hyaline ; small cross-vein on the middle of the

discal cell; third vein slightly curved before its end; fourth vein with a blunt angle; apical and posterior

cross-veins nearly straight.

’

Hab. Mzxico, Xucumanatlan 7000 feet and Omilteme 8000 feet, both in Guerrero

(H. H. Smith).

Several male and some female specimens. One of the latter has black palpi: but as

it only differs from the others in this respect, I regard it as conspecific. |

19. Hypostena nubilosa, sp. n., ¢ (2%).

Yellowish-cinereous; frontal band, four thoracic stripes, a broad hind border to the second and following

abdominal segments, antenne, and legs black; palpi rufous; wings infuscated on the costa and on the

small cross-vein.

Length 6:5 millim.

Front narrowed behind, nearly as broad as the eyes; frontal band as broad as the lateral portions ; frontal

bristles on each side in a single row, descending to beneath the second antennal joint; eyes descending as

far as the tip of the antenne ; vibrisse inserted at the oral margin; beard white. Antenne nearly as

long as the face; second joint bristly ; third joint narrow, four or five times as long as the second ; arista

150 DIPTERA,

thickened in its proximal third. Proboscis black; palpi dark rufous. Thorax and scutellum cinereous ;

thoracic dorsum with an ochraceous tint and four nearly linear black stripes, the outer of which are inter-

rupted at the transverse suture. Abdomen conical; first segment black; second and third segments

black, with cinereous front borders, which are more or less interrupted in the middle, that of the second

segment being enlarged laterally; anal segment cinereous, with a black tip; all the segments with

marginal macrochete, those of the third segment longer; the anal segment with many macrochate and

black hairs. Legs less slender than in most of the preceding species; posterior tibie with some long

bristles ; foot-claws and pulvilli elongate, the pulvilli blackish. Tegule whitish. The brownish tint on

the costa of the wings is most conspicuous between the end of the first and second veins and on the small

cross-vein ; this cross-vein is on the middle of the discal cell; the curvature of the fourth vein forms a

blunt angle; apical cross-vein curved near its end; posterior cross-vein distinctly sinuous.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single male example.

A female specimen, from Omilteme 8000 feet, Guerrero (H. H. Smith), is perhaps

the other sex of it. The latter, in addition to the usual sexual differences (a broader

front, a more ovate abdomen, and short foot-claws and pulvilli), has black palpi,

narrower grey front borders to the abdominal segments, and a less conspicuous brownish

tint on the wings, this tint, moreover, not being extended over the small cross-vein,

DEGEERIA.

Degeeria, Meigen, System. Beschr. europ. zweifl. Ins. vii. p. 249. no. 37 (1838).

In this genus—characterized by elongate antenne, bare eyes, bristles on the facial

ridges, and the apical cell ending in or nearly in the wing’s tip—the following Central-

American species must be included. Like the European representatives, they are all

of small size, the largest of them being only about 5 millim. in length.

1. Insertion of the posterior cross-vein in the fourth vein

nearer to the curvature of this vein than to the small

cross-veln . . . . 2... ., oe 2. 2

Insertion of the posterior cross-vein in the fourth vein

in the middle or before the middle between the small

cross-vein and the curvature of the fourth vein . . 5.

2. Wings blackish on the costa. . . . - . nigrocostalis, v. d. Wulp.

Wings hyaline (sometimes infuscated at the base) . . 38.

8. Posterior cross-vein sinuous . . . . . . . . . mitidiuscula, vy. d. Wulp.

Posterior cross-vein straight . . 2. 2. 6 ee ew ew ds

4, Base of the wings infuscated . . . . . . . . . basalis, v. d. Wulp.

Base of the wings not infuscated . . . . . . . hyalinipennis, v. d. Wulp.

5. Second and third abdominal segments with only mar-

ginal macrochete . . . oe ew ee es 6,

Second and third abdominal segments with discal and

marginal macrochete . . . ° -.. 8&

6. Frontal band as broad as the lateral portions - + . nigricans, v. d. Wulp.

Frontal band narrower than the lateral portions . . 7.

DEGEERIA

as limited by B.B., pt.iii, 129.

Male with two very long hairlike vertical bristles; with two

very long hairlike orbitals, situated almost on the vettex

Abdomen of @ not serrate below; the vertical bristles, two

orbitals and the ocellars are stout in the 9. No apical

scutellar bristles, laterals six, divergent. Ocellar brisltes

in ¢ hairlike. Four or more discal macrocnaetae on segments 2

and 3 of abdomen in ¢, in @ two long ones, rarely more.

VIBRISSINA

as Limited by B.B. loc.cit.

Vertical bristles of both sexes stout. Addomen of °? below a

little serrate, compressed. Orb ital bristles in ¢ “none. in 9

two. Cheeks 1/3 the eve-heignt. Apical scutellar bristles

slender, hardlt or rarely cruciate, erect. Second and thirs abi

dominal segments each with 2 discal macrocnaetae,

BOTH PRECEDING GENERA

have the following in common: (B.B.) loc.cit.)

Third antennal joint long, linear; first posteroir cell ending

at or nearly at the apex of the wing, open, fourth vein with a

rounded curve or slightly angular, but not appendiculate. Eyes

bare. .Arista bare. Vibrissae at the oral margin. Palpi of

usual form. Hexét Inferior margin of head when viewed from the

Side, horizontal, straight, fatRer lene--rereiy—-srent—peees

Oral bristles not or nardly ascending (means vibrissaul ridzes

bare or nearly so). Clypeus not narrowed by the vibrissal pro-

cesses. Hind crossvein not more oblique than apical. Hind tib-

jae not ciliated with bristles. Pl.viii,f.208, snows facial

ridges bristly over s way up! in Degeerial

: B.Be, pt.i, 95, give

FOR BOTH:-—-2d joint of arista short;

Degeeria:--Sides of face bare; .

Vibrissina :~~Tyes with fine and scattered and fine Dubescemce;

(figure shows sides of face bare); 4th vein vowed, not ang-

ular:

DEGEERIA. 151

7. Abdomen elongate-oval, longer than the thorax . . magnicornis, v. d. Wulp.

Abdomen compressed at the sides, not longer than the

thorax . . 6 6. 1 ew ew ee ew ee we COmpressa, V. A. Wulp.

8. Palpirufous . 2... 1 we we ee ee OD

Palpi black . . . wee ~ .e. Ld

9. Abdomen black, without whitish markings ~ + « « monochroma, v. d. Wulp.

Abdomen black, with whitish front borders to the

segments ... . soe ee ew ew ew ew «10~E

10. Wings hyaline, with thin venation. . . . . . . Jeucocycla, v.d. Wulp.

Wings brownish, with thick venation . . . “. »« nervosa, v. d. Wulp.

11. Thorax anteriorly greyish, with four black stripes . . albomarginata, v. d. Wulp.

Thorax black, with some whitish markings . . . . Jlongipes, v.d. Wulp.

1. Degeeria nigrocostalis, sp.n.3. (Tab. IV. fig. 10, wing.)

Shining black; thorax cinereous; palpi rufous; wings blackish along the costa.

Length 4 millim.

Face whitish, a little inclined; the bristles on the facial ridges not numerous and not mounting higher than

half the length of the eyes; front cinereous, as broad as the eyes; frontal band black, with cinereous

reflections ; frontal bristles descending to beneath the second antennal joint. Antenne black, as long as

the face: second joint bristly; third joint four or five times as long as the second; arista thickened to

nearly half its length. Palpi brownish-red. Thorax before the transverse suture with cinereous

tomentum and four not very distinct black stripes. Abdomen shining black, somewhat bronze metallic,

with scarcely any greyish reflection on the front margins of the segments, and with long discal and

marginal macrochete. Legs black, with scattered bristles; foot-claws and pulvilli short. Tegule

yellowish-grey. Wings greyish, at the base and along the costa blackish, most obscure between the end

of the auxiliary and second veins; a small hyaline point where the auxiliary vein begins to depart from

the first vein; small cross-vein distinctly before the middle of the discal cell; curvature of the fourth

vein with a blunt angle; apical and posterior cross-veins straight, the latter much nearer to that curvation

than to the small cross-vein.

Hab. Mexico, Xucumanatlan 7000 feet, Omilteme 8000 feet, both in Guerrero

(H. H. Smith), Orizaba (H. H. Smith & F. D. G.).

Four specimens, which I regard as males, notwithstanding the shortness of the foot-

claws and pulvilli.

2. Degeeria nitidiuscula, sp. n.,¢.

Black; face and sides of the front with ochraceous reflections ; thorax anteriorly cinereous, with black stripes ;

abdominal segments with white front borders ; hind tibise outwardly fringe-like with bristles; posterior

eross-vein nearer to the curvation of the fourth vein than to the small cross-vein.

Length 5°5 millim.

Front as broad as the eyes; frontal band black, as broad as the lateral portions ; frontal bristles on each side

in a single row, descending as far as the end of the second antennal joint ; vibrisse inserted a little above

the oral margin. Antenne black, shorter than the face; second joint bristly; third joint four times as

long as the second ; arista thickened to less than the proximal half. Proboscis black ; palpi dark rufous.

Thorax anteriorly with cinereous tomentum and somewhat indistinct black stripes. Abdomen ovate,

black, and black-haired, shining, especially on the anal segment; second and following segments with

narrow white front margins; the second and third segments with short marginal macrochete; anal

152 DIPTERA.

segment with similar macrochete on. the disc. Legs black’; middle tibiee with some long bristles; hind

tibiee outwardly with a row of short bristles. Tegule whitish. Wings hyaline, with a dilute greyish tint ;

small cross-vein on or just before the middle of the discal cell; curvation of the fourth vein with a blunt

angle; apical cell narrowly opened at a short distance before the wing’s tip ; apical cross-vein oblique and

straight; posterior cross-vein slightly sinuous, insérted beyond the middle between the small cross-vein

and the curvature of the fourth vein. © mors

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single female specimen.

3. Degeeria basalis, sp. n., 2 ..

Black; head greyish; thorax anteriorly cinereous, with four black stripes; abdominal segments with whitish

front borders; palpi rufous; hind tibia with bristles of unequal length ; wings infuscated at the base ;

posterior cross-vein nearer to the curvation of the fourth vein than to the small cross-vein.

Length 3°5 millim.

Front cinereous, distinctly broader than the eyes; frontal band brown, broader than the lateral portions ; frontal

bristles on each side in a single row, descending as far as the end of the second antennal joint; vibrisse

inserted a little above the oral margin. Antenne black, shorter than the face ; second joint bristly ;

third joint nearly four times as long as the second; arista thickened to the proximal half. Proboscis

black; palpi pale rufous, blackish at the base. Thorax before the transverse suture cinereous, with four

rather broad black stripes; pleuree somewhat cinereous. Abdomen ovate, shining black; second and

following segments with well-defined yellowish-white front borders, which laterally are broader and in

the middle interrupted by a narrow black dorsal line (in the second and third segments the whitish colour

occupies no more than a fourth or a third of the length of the segments, on the anal segment it is

extended to more than the half); all the segments with long marginal macrochete, the second and

third with short discal ones also ; the anal segment with many long black hairs. Legs black ; underside

of the hind femora with long bristly hairs; middle tibia with some long bristles; hind tibiee outwardly

with several bristles of unequal length. Tegule yellowish-white, Wings grey, their base (to the end of

the first vein and to the small cross-vein) brownish; small cross-vein distinctly before the middle of the

discal cell; curvature of the fourth vein with a blunt angle; apical cross-vein very slightly concave ;

posterior cross-vein nearly straight, inserted beyond the middle between the small cross-vein and the

curvature of the fourth vein.

Hab. Mzxico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single female specimen.

4. Degeeria hyalinipennis, sp. n., ?.

Head whitish ; thorax cinereous, with black stripes ; abdomen shining black, with narrow white front margins

to the segments ; antenne and legs black ; palpi rufous ; posterior cross-vein beyond the middle between

the small cross-vein and the curvation of the fourth vein.

Length 3-3°5 millim. . .

Head greyish-white ; front broader than the eyes; frontal band blackish, narrower than the lateral portions;

frontal bristles inserted on black points, on each side in # single row, descending as far as the end of the

second antennal joint ; vibrissae inserted a little above the oral margin, Antenne shorter than the face ;

second joint bristly; third joint four or five times as long as the second ; arista thickened to the

proximal half. Proboscis black; palpi pale rufous, slightly thickened towards the tip. Thorax and

scutellum cinereous; thoracic dorsum with four black stripes, which are interrupted at the transverse

suture, the intermediate ones linear. Abdomen ovate, shining black; the second and following segments

with rather narrow whitish front borders and with marginal macrochete. Middle tibie with some long

bristles ; hind tibiee outwardly with several bristles of unequal length. Tegule whitish. Wings grevish-

hyaline; small cross-vein distinctly before the middle of the discal cell; third vein nearly straight ;

DEGEERIA. 153

curvature of the fourth vein with a blunt angle; apical cell very narrowly opened (sometimes nearly

closed) just before the wing’s tip ; apical and posterior cross-veins straight, the apical more oblique.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

Four female specimens.

5. Degeeria nigricans, sp. n., ¢.

Black ; face and cheeks whitish; thorax anteriorly grey, with black lines; abdominal segments with narrow

white front margins; palpi rufous.

Length 4 millim.

Front cinereous, broader than the eyes ; frontal band blackish, as broad as the lateral portions; frontal bristles

descending beneath the second antennal joint; vibrisse inserted at the oral margin; beard white.

Antenne black, shorter than the face; second joint bristly ; third joint four or five times as long as the

second; arista thickened to the proximal half. Thorax with whitish-grey tomentum, before the trans-

verse suture with two black lines. Abdomen elliptical, shining black, the second and following segments

with narrow white front margins and with marginal macrochete ; on the middle of the anal segment

some shorter macrochete. Legs black; hind tibie with a row of bristles of unequal length. Tegule

whitish. Wings nearly hyaline; small cross-vein a little before the middle of the discal cell; apical cell

very narrowly opened at the wing’s tip; curvature of the fourth vein with a blunt angle; apical cross-vein

very slightly concave; posterior cross-vein straight, in the middle between the small cross-vein and the

curvature of the fourth vein.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single male specimen.

6. Degeeria magnicornis, sp. n., 3 2. |

Black; head whitish; thorax grey, with four black stripes; abdomen with white front margins to the

segments, without discal macrochete ; antennz very long; palpi rufous.

Length 3°5 millim.

Front as broad as the eyes, with parallel sides ; frontal band black, narrower than the lateral portions ; frontal

bristles descending beneath the second antennal joint. Antenne black, as long as the head, the basal

joints very short; arista inserted at the base of the third joint, thickened to the proximal half. Thorax

greyish, the black stripes distinct—the intermediate stripes linear, the outer ones broader and in the form:

of spots. Abdomen elongate-oval ( ¢ ) or ovate (2 ); second and following segments with rather narrow

white front borders, which are interrupted by a black dorsal line ; on the anal segment the white colour

is sometimes less conspicuous; macrochate only at the hind margins of the segments. Legs black; hind

tibis with several bristles of unequal length; foot-claws and pulvilli short in both sexes. Tegule

whitish. Wings hyaline, with a slight greyish tint; small cross-vein a little before the middle of the

discal cell; curvature of the fourth vein with a blunt angle or somewhat rounded ; apical cell narrowly

opened or nearly closed just before the wing’s tip; apical and posterior cross-veins nearly straight, the

posterior perpendicular, in the middle between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico, Amula in Guerrero 6000 feet, Atoyac in Vera Cruz (i. H. Smith).

Three male specimens (one of which has lost the abdomen) and one female.

e . _ O -

7. Degeeria compressa, sp.n., ¢ 2. (Tab. IV. figg. 9; 9a, wing.) = C2 la

Black; head whitish-grey ; thorax anteriorly grey ; abdomen not longer than the thorax (compressed in the

female), with whitish lateral stripes, without discal macrocheete ; palpi pale rufous.

Length 3 millim.

Front broader than the eyes; frontal band black, narrower than the lateral portions; frontal bristles

descending a little beneath the root of the antenne ; facial bristles mounting to beyond half the face.

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154 DIPTERA.

Antenne black, somewhat shorter than the face; basal joints short; third joint slender, five times as

long as the second ; arista thickened to the proximal half. Thorax at the sides and before the transverse

suture with grey tomentum, anteriorly with indistinct black stripes. Abdomen as long as the thorax, in

the male conical and convex, in the female compressed at the sides; the front borders of the last two

segments laterally with a whitish reflection ; macrochete only at the hind margins of the segments; in

the female the anal segment has a long dagger-like projection (the ovipositor?), which is directed towards

the venter. Legs black, bristly. Tegule and wings greyish-hyaline; small cross-vein on the middle of

the discal cell; curvature of the fourth vein with a blunt angle; posterior cross-vein straight, in the

middle between the small cross-vein and the curvature of the fourth vein. EB gf hoeth frawe £ weal 2 oth ah

Hab. Mexico, Amula 6000 feet, Omilteme 8000 feet, both in Guerrero, Atoyac in

Vera Cruz (H. H. Smith).

A male and two female specimens.

8. Degeeria monochroma, sp. n., 2.

Shining black; thorax anteriorly with scarcely any grey tomentum; antenne long; palpi rufous.

Length 2 millim.

One of the smallest Tachininw. Face black, with white reflections; front as broad as the eyes, almost wholly

occupied by the black frontal band; facial bristles mounting to the point where the frontal bristles

terminate. Antenne as long as the face ; basal joints very short; arista inserted at the base of the third

joint and thickened to the proximal half. Thorax with white humeral spots and somewhat greyish on

the anterior margin. Abdomen ovate, without any light markings; discal and marginal macrocheetee

present. Legs black; hind tibiz with several bristles. Tegule and wings greyish-hyaline ; small cross-

vein distinctly before the middle of the discal cell; curvature of the fourth vein with a blunt angle;

posterior cross-vein straight, nearly perpendicular, in the middle between the small cross-vein and the

curvature of the fourth vein.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

9. Degeeria leucocycla, sp. n., ¢ .

Black; thorax anteriorly grey, with four black stripes; abdomen with white front borders to the segments ;

palpi rufous; apical cell sometimes closed at the wing’s margin.

Length 3 millim.

Face and sides of the front with grey reflections; front as broad as the eyes; frontal band black, as broad as .

the lateral portions; frontal bristles descending as far as the end of the second antennal joint; facial :

bristles reaching to half the face. Antenne black, shorter than the face; third joint four times as long

as the second; arista thickened to the proximal third. Palpi pale rufous, enlarged towards the tip.

Thorax before the transverse suture with whitish-grey tomentum and four black stripes. Abdomen

convex, subcylindrical in the male, ovate in the female; second and following segments with white front

borders, which are interrupted by a black dorsal line; discal and marginal macrochete present. Legs

black; hind tibiee outwardly with a row of bristles; foot-claws and pulvilli short in both sexes. Tegule

whitish. Wings greyish-hyaline, with a short costal spine ; small cross-vein on the middle or somewhat

before the middle of the discal cell; curvature of the fourth vein rounded ; apical cell very narrowly

pened, sometimes closed on the wing’s margin at a little distance from the wing’s tip ; posterior cross-

vein slightly curved or nearly straight.

Hab. Mexico, Dos Arroyos 1000 feet, Chilpancingo 4600 feet, Amula 6000 feet, and

Omilteme 8000 feet, all in Guerrero, Atoyac in Vera Cruz (H. H. Smith).

Several males and one female.

DEGEERTA. 155

In two other female specimens the small cross-vein is distinctly before the middle

of the discal cell; but as they agree in all other respects with the above description, I

believe they belong to the same species.

10. Degeeria nervosa, sp. n., 2.

Black; head, humeral spots, and narrow front margins to the abdominal segments whitish; palpi rufous ;

“Wings somewhat infuscated.

Length 3. millim.

Head with white and grey reflections; front as broad as the eyes; frontal band black, as broad as the lateral

portions ; frontal bristles descending to beneath the second antennal joint; vibrissee inserted at the oral

margin. Antenne black, shorter than the face; second joint bristly ; third joint four times as long as

the second ; arista thickened to the proximal half. Proboscis black, its terminal lips and the palpi dark

rufous. Thorax and scutellum black; humeral spots and two short transverse lines before the suture

whitish, these sometimes inconspicuous; pleure greyish. Abdomen ovate, shining black; second and

following segments with scarcely visible narrow white front borders, and with discal and marginal

macrochete. Legs black; middle tibie with some long bristles; hind tibie outwardly with several

bristles of unequal length. Tegulze whitish. Wings rather broad, with a brownish-grey tint, more

intense along the costa, and with black veins; small cross-vein on the middle of the discal cell; apical

cell very narrowly opened at a little distance before the wing’s tip; apical cross-vein straight ; posterior

cross-vein slightly concave, nearly midway between the small cross-vein and the curvature of the

fourth vein.

Hab. Mexico, Omilteme in Guerrero 8000 feet (7. H. Smith).

A single female specimen.

11. Degeeria albomarginata, sp. n., 2.

Shining black; thorax anteriorly whitish, with four black stripes ; front borders of the abdominal segments

whitish.

Length 4 millim.

Face and sides of the front whitish; frontal band black; frontal bristles descending beneath the second

antennal joint; facial bristles mounting to the point where the frontal bristles terminate. Antenne

shorter than the face; third joint four times as long as the second ; arista thickened to the proximal

third. Proboscis and palpi black. Thorax anteriorly with a whitish tomentum, which does not reach

the transverse suture and is interrupted by four black stripes. Abdomen elongate-oval; front borders

of the second and following segments whitish, more conspicuously so at the sides; discal and marginal

macrochete present, the discal ones, however, shorter. Legs, tegule, and wings as in D. magnicornis ;

the apical cell very narrowly opened.

Hab. Mexico, Cuernavaca in Morelos (H. H. Smith), Orizaba (H. H. Smith & F. D.G.).

From each of these localities a single female specimen.

12. Degeeria longipes, sp. n., 3 2.

Black; face, some spots on the thorax, and front margins of the abdominal segments whitish; wings

brownish (¢) or grey (9).

Length 5 millim. .

Front in the male much narrower than, in the female as broad as, the eyes, in both sexes almost wholly

occupied by the black frontal band, the lateral portions scarcely forming two white reflecting lines;

frontal bristles descending a little beneath the root of the antenne ; face and cheeks white, with blackish

reflections ; vibrisse inserted near the oral margin; beard white. Antenne black, shorter than the face ;

second joint bristly ; third joint four times as long as the second; arista thickened to the proximal half.

£2

156 DIPTERA.

Proboscis and palpi black. Thorax and scutellum black; thoracic dorsum with white reflecting spots on

the shoulders and immediately before the transverse suture. Abdomen cylindrical (3) or ovate (2),

shining black, the second and following segments with whitish front margins ; in the male with long discal

and marginal macrochete, the ventral surface and the anal segment densely clothed with long black

hairs, and the genitals conspicuous; in the female the macrochete and hairs are shorter. Legs black—

in the male long and slender (the front tarsi longer than the tibie), the middle and hind tibie with some

long bristles, the foot-claws and pulvilli elongate, the pulvilli yellowish, but partly obscure; in the

female shorter, the tarsi, foot-claws, and pulvilli not elongate. Tegule yellowish (3) or white (9).

Wings of the male brownish, more intense towards the costa, those of the female greyish, a little more

obscure on the costa; small cross-vein nearly on the middle of the discal cell; apical cell narrowly

opened at the wing’s tip; curvature of the fourth vein arcuate; apical cross-vein very slightly concave ;

posterior cross-vein straight, nearly in the middle between the small cross-vein and the curvature of the

fourth vein.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

In its general facies (the narrow front, the elongate body and legs, the hairy abdomen,

&c.) the male differs from the corresponding sex of the other species of the genus; the

female, on the contrary, has the usual aspect. That they are indeed the sexes of the

same species seems to be proved by the particular markings of the thorax, which are

quite similar and not present in any of the other members of the genus.

M. Bigot has characterized the following Central-American species of Degeeria, but I

cannot recognize in them any of the species here described.

Degeeria cora, Bigot, Ann. Soc. Ent. Fr. 1888, p. 259. no. 29.—Mexico.

anthracina, Bigot, loc. cit. no. 30.—Mexico.

DIDYMA, gen. nov.*

‘Small, blackish species. Head hemispherical ; front scarcely prominent, moderately broad, in the male usually

narrowed behind ; frontal bristles descending on each side in a single row beneath the root of the antenne ;

face perpendicular or slightly inclined; facial ridges fringed with bristles; vibrissee inserted at the oral

‘margin, which is not prominent. Eyes pilose. Antenne nearly as long as the face; their basal joints

short; third joint at least four times as long as the second; arista bare, not visibly jointed. Proboscis

slightly exserted ; palpi cylindrical or filiform. Abdomen conical or elliptical; basal segment as long as

the following segment; the segments with marginal, sometimes with discal and marginal, macrochete.

Legs bristly ; foot-claws and pulvilli short in both sexes. Wings longer than the abdomen ; apical cell

narrowly opened, ending at a very little distance above the wing’s tip; curvature of the fourth vein with

a blunt angle; posterior cross-vein in the middle or a little beyond the middle between the small cross-

vein and the curvature of the fourth vein. :

This genus is very nearly allied to Degeeria, but differs from it in the hairy eyes.

From the smaller species of Phorocera, Didyma is distinguished by the apical cell

ending close to the wing’s tip. Eighteen species are referred to it, all from Mexico :—

1. Thorax black, without stripes . . 2. . 2... Q,

Thorax with whitish or greyish tomentum, and more or less

distinct stripes . . 3.

e « s e €

* didupos (twin).

10.

ll.

12.

13.

14.

15.

16.

17.

. Abdomen laterally yellow;

DIDYMA.

Abdomen with long discal and marginal macrochete .

Abdomen only with short marginal macrochzete .

- Head yellowish or ochraceous .

Head blackish, whitish, or grey .

. The black frontal band as broad as the lateral ‘portions ; ;

thorax blackish . : os ew ee

The black frontal band narrower +» than the lateral portions ;

thorax cinereous

. Macrochetz of the abdomen long . .... .

Macrocheetze of the abdomen short

. The black thoracic stripes indistinct; base of the wings

infuscated . .

The black thoracic stripes distinct wings wholly hyaline.

. Abdomen with discal and marginal macrochete .

Abdomen with marginal macrochetz only .

. Posterior cross-vein in the middle between the small cross-

vein and the curvation of the fourth vein

Posterior cross-vein nearer to the curvation of the fourth

vein re

third vein distinctly curved

upward before its end . oe ee ww

Abdomen without yellow coloration; third vein nearly

straight er

Palpi black . . . 2. 2. 2. 2 ew ee

Palpi rufous . 2 . soe .

Thoracic stripes very distinct before the transverse suture ;

macrochetz long; larger species (7°5 millim.).

Thoracic stripes indistinct; macrochetze short; smaller

species (5-5°5 millim.) an

Small cross-vein infuscated ; apical cross-vein curved .

Small cross-vein not infuscated; apical cross-vein nearly

straight . oe

Macrochete of the abdomen short ~ oe ee

Macrochetz of the abdomen long

-Palpi black .

Palpi rufous

Hind tibiz outwardly nearly fringe-like with bristles

Hind tibize outwardly with bristles of unequal length

Venation of the wings strong .

Venation of the wings thin. .

Anal segment unicolorous shining black

Anal segment with a whitish front border .

157

mesta, v. d. Wulp.

nigricolor, v. d. Wulp.

ambulatriz, v. d. Wulp.

otiosa, v. d. Wulp.

basilaris, v. d. Wulp.

modesta, v. d. Wulp.

13.

10.

exigua,v.d. Wulp. We. Coq.

timida, v.d. Wulp. #9 .C,> Coq.

11.

12.

vagabunda, v. d. Wulp.

prompta, v. d. Wulp.

pullula, v. d. Wulp.

albomicans, v. d. Wulp.

inconspicua, v.d. Wulp. +f£a- Coq.

14.

15.

16.

commizta, v. d. Wulp.

. fuliginipennis, v. d. Wulp.

validinervis, v. d. Wulp.

17.

pavida, v. d. Wulp.

volucris, v. d. Wulp.

158 DIPTERA.

1. Didyma mesta, sp.n., ¢ 2.

Black, opaque ; thorax without stripes; abdomen greyish-pollinose, with discal and marginal macrochete.

Length 5-5-6°5 millim.

Front slightly prominent, in the male scarcely as broad as the eyes, in the female broader, in both sexes

black with a silvery-white reflection, which, however, is not extended to the vertex; frontal band black,

narrower than the lateral portions ; frontal bristles on each side in a curved row, descending as far as

the end of the second antennal joint; the bristles on the vertex and two lateral ones (orbital bristles),

which are directed forwards, more robust. Eyes densely clothed with yellowish pile. Face and cheeks

blackish, with a white reflection ; the oral margin and the lower part of the cheeks (beneath the eyes)

have a rufous reflection; bristles on the facial ridges mounting to half the face; vibrisse inserted

near the oral margin. Antenne black, not fully reaching the vibrisse; third joint four times as long as

the second, truncate at the end; arista thickened at the base. Proboscis black ; palpi cylindrical, black,

the tip more or less rufous. Thorax black, opaque (seen from the front, the thoracic dorsum appears

somewhat cinereous), without trace of stripes; scutellum black, with whitish-grey tomentum. Abdomen

ovate, black; the second and following segments with whitish-grey tomentum, narrow white front

margins, and not very long discal and marginal macrocheta. Legs black; front tibiee outwardly with a

row of short bristles; middle tibia with some long bristles; hind tibie outwardly with many bristles

and a longer one below the middle. Tegule whitish, brownish at the base. Wings nearly hyaline;

small cross-vein a little before the middle of the discal cell; apical cross-vein straight ; posterior cross-

vein curved.

Hab. Mexico, Chilpancingo 4600 feet, Amula 6000 feet, Xucumanatlan 7000 feet,

and Omilteme 8000 feet, all in Guerrero (H. H. Smith).

Several males and one female.

2. Didyma nigricolor, sp. n., ¢ 2.

Shining black, pilose; abdomen with narrow whitish front borders to the segments, without discal macro-

cheetee ; palpi black.

Length 4—4°5 millim.

Head black, the face with some grey reflections ; front narrower than the eyes; frontal bristles descending as

far as the end of the second antennal joint; eyes densely pilose. Antenne black, shorter than the

face; third joint four times as long as the second ; arista thickened not fully to half its length; palpi

black, sometimes more or less rufous at the tip. Thorax and scutellum black, without grey tomentum

or stripes. Abdomen conical (in the female a little broader), shining black, densely beset with black

pile, with narrow whitish front borders to the second and following segments; macrochet short, less

conspicnous among the hairs and only at the hind margins of the second and third segments. Legs

black ; hind tibise outwardly with a row of bristles. Tegule and wings greyish-hyaline ; small cross-vein

a little before the middle of the discal cell ; apical and posterior cross-veins nearly straight.

Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith); Costa Rica,

Volcan de Irazu 6000 to 7000 feet (Rogers).

Two male and three female specimens.

8. Didyma ambulatrix, sp. n., (2%).

Blackish ; front and cheeks ochraceous ; thorax anteriorly greyish, with black stripes; abdominal segments

with whitish front borders, and with long marginal and shorter discal macrochete.

Length 5°5 millim.

Front not prominent, ochraceous, as broad as the eyes, with parallel sides ; frontal band blackish, as broad as

DIDYMA. 159

the lateral portions; frontal bristles on each side in a curved row, descending as far as the end of the

second antennal joint; the bristles on the vertex and two lateral ones more robust; central part of the

face blackish, with white reflections; cheeks ochraceous, with brown reflections; eyes densely clothed

with yellowish pile; bristles on the facial ridges mounting to half the face. Antenne black, shorter

than the face; second joint with short bristles; third joint four times as long as the second; arista

thickened at the base. Proboscis black, its terminal lips and the palpi dark rufous. Thorax and

scutellum black; thoracic dorsum before the transverse suture with cinereous tomentum and four black

stripes. Abdomen elongate-oval ; first segment black, shorter than the following segments, which are

brownish-black with whitish front margins, the whitish colour interrupted in the middle and sometimes

having the appearance of larger or smaller spots; discal and marginal macrochete are present, but the

discal ones are shorter than the others. Legs black; middle tibiae with some long bristles; hind tibie

outwardly with bristles of unequal length. Tegule yellowish. Wings greyish-hyaline ; small cross-vein

distinctly before the middle of the discal cell ; apical cell very narrowly opened just before the wing's

tip ; apical cross-vein straight ; posterior cross-vein curved.

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith).

One male example.

A female specimen from Amula, 6000 feet, in Guerrero (H. H. Smith), agrees with

the above description ; but it has the front broader, the tomentum on the thorax more

extended posteriorly, the black stripes more distinct, the abdomen shorter and broader

and with (in addition to the whitish front borders to the segments) irregular cinereous

and black reflections, and the opening of the apical cell less narrow. It is probably

the other sex. of D. ambulatriz.

4, Didyma otiosa, sp. n., ¢.

Blackish ; front and cheeks ochraceous ; thorax cinereous, with four black stripes; abdominal segments with

whitish front borders ; macrochsete short.

Length 6°5 millim.

Allied to the preceding species (D. ambulatria), but differing from it in the following respects :—The pilosity

of the eyes is much shorter and only conspicuous under a strong lens; the cinereous tomentum and the

black stripes on the thorax are extended to behind the transverse suture ; the whitish front borders of

the abdominal segments are more sharply delineated and there is a more distinct black dorsal stripe ;

the discal and marginal macrochste are very short and but little conspicuous among the black hairs ; the

apical cell is more broadly opened at its end.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen.

5. Didyma basilaris, sp. n., ¢.

Black; head ochraceous; frontal band narrow; thoracic stripes indistinct; abdomen with whitish reflecting

spots and with discal and marginal macrochete ; base of the wings infuscated.

Length 5°5 millim.

Front ochraceous, slightly prominent ; narrowed behind and there narrower than the eyes; frontal band black,

linear ; frontal bristles descending as far as the end of the second antennal joint; face and cheeks

ochraceous ; eyes densely clothed with yellowish pile; bristles on the facial ridges stout. Antenne black,

nearly as long as the face; second joint with short bristly hairs; third joint five times as long as the

second; arista thickened to its proximal half. Proboscis black; palpirufous. Thorax blackish, anteriorly

with some cinereous tomentum and obsolete black stripes ; scutellum black. Abdomen ovate, black, with

160 DIPTERA.

whitish reflecting spots on the front borders of the second and following segments; densely beset with

black hairs and armed with rather long discal and marginal macrochete. Legs black; middle tibie

with some long bristles ; hind tibie outwardly with bristles of unequal length. Tegule yellowish-white.

Wings greyish-hyaline ; the brownish tint at the base extended to the end of the first vein and over the

three basal cells; at the base of the mediastinal cell is a hyaline point; small cross-vein a little before

the middle of the discal cell; apical cross-vein oblique and straight; posterior cross-vein slightly

curved.

Hab. Mzxico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single male specimen.

6. Didyma modesta, sp. n., 2.

Blackish ; head yellowish ; thorax cinereous, with four black stripes ; abdomen with whitish reflecting spots

and with discal and marginal macrochete ; palpi rufous.

Length 5°5 millim,

Front a little broader than the eyes, with parallel sides; frontal band black, narrower than the lateral

portions ; frontal bristles descending as far as the end of the second antennal joint; face and cheeks

yellowish; eyes thinly pilose. Antenne black; second joint bristly ; third joint four times as long as

the second ; arista thickened at the base. Proboscis black ; palpi pale rufous, slightly thickened towards

the tip. Thorax and scutellum greyish-cinereous; thoracic dorsum with four distinct, rather broad,

black stripes, the outer stripes interrupted at the transverse suture. Abdomen ovate, black, with whitish

reflecting spots on the front borders of the second and following segments; discal and marginal macro-

cheetes are present. Legs black; front tibie with a row of short bristles; middle tibie with some long

bristles ; hind tibie outwardly with short bristles and a longer one below the middle. Tegule whitish.

Wings greyish-hyaline ; small cross-vein a little before the middle of the discal cell; apical cross-vein

straight ; posterior cross-vein very slightly curved.

Hab. Mextco, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith).

A single female specimen.

7. Didyma exigua, sp. n. (<2).

Blackish ; thorax with indistinct stripes; abdomen with whitish front borders to the segments, laterally

yellowish ; discal and marginal macrochete present.

Length 4°5 millim.

Front narrower than the eyes, almost wholly occupied by the black frontal band, the lateral portions linear

and with a greyish reflection ; frontal bristles descending as far as the end of the second antennal joint ;

face and cheeks blackish, the cheeks narrow; the inner orbits of the eyes grey; eyes thinly pilose.

Antenne black; third joint four times as long as the second; arista thickened to its proximal third.

Proboscis and palpi retracted in the oral cavity, apparently black. Thorax and scutellum black; thoracic

dorsum anteriorly with some greyish tomentum and obsolete stripes. Abdomen obconical, shining black,

the front borders of the second and following segments whitish, the second and third segments laterally

yellow and somewhat transparent; ventral surface yellowish, with black hind borders to the segments and

a black median stripe. Legs black; middle tibie with some long bristles; hind tibis outwardly with a

row of shorter bristles. Tegule yellowish-white. Wings greyish-hyaline; small cross-vein on the

middle of the discal cell; third vein curved upwards before its end; apical cell very narrowly opened

just before the wing’s tip ; apical cross-vein slightly concave; posterior cross-vein distinctly curved.

Hab. Muxico, La Venta in Guerrero 300 feet (H. H. Smith).

A single specimen, which, owing to the narrow front, seems to be a male.

DIDYMA. 16]

8. Didyma timida, sp. n.,¢ 2.

Blackish ; thorax anteriorly whitish-grey, with black lines; abdominal segments with narrow white front

borders ; posterior cross-vein in the middle between the small cross-vein and the curvature of the fourth

vein.

Length 5°25 millim.

Front cinereous, as broad as the eyes, in the male scarcely narrowed behind; frontal band black, nearly as

broad as the lateral portions; frontal bristles descending as far as the end of the second antennal joint ;

face and cheeks blackish, the cheeks narrow and with a whitish reflection; eyes thinly pilose. Antenne

black ; third joint four times as long as the second; arista thickened to near the middle. Proboscis

black ; palpi black or dark rufous. Thorax and scutellum black; thoracic dorsum before the transverse

suture with a whitish tomentum and four black lines. Abdomen conical, black ; second and following

segments with narrow white front borders, which in the middle are interrupted by a black dorsal line ;

discal and marginal macrochetz present, the marginal ones longer than the others. Legs black; middle

tibie with some long bristles; hind tibia outwardly with bristles of unequal length; foot-claws and

pulvilli short in both sexes. Tegule white. Wings greyish-hyaline ; small cross-vein on the middle of

the discal cell; third vein nearly straight ; apical cell very narrowly opened just before the wing’s tip ;

apical cross-vein oblique and straight ; posterior cross-vein less oblique, nearly straight, inserted in the

middle between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

Two males and one female.

9. Didyma vagabunda, sp. n., 2.

Black ; thorax anteriorly grey, with four black stripes; abdomen with whitish front borders to the segments

and with discal and marginal macrochetee.

Length 7:5 millim.

Front with whitish reflections, slightly prominent and a little broader than the eyes, narrowed behind ; frontal

band black, attenuated towards the vertex; frontal bristles on each side forming a nearly continuous row

with the bristles on the facial ridges ; on the sides of the front several other bristles close to the orbits of

the eyes; face and cheeks with white and blackish reflections; eyes thinly pilose. Antenne black,

distinctly shorter than the face; second joint bristly ; third joint four times as long as the second,

truncate at the tip; arista thickened to its proximal half. Proboscis and palpi black; the palpi cylin-

drical and longer than in the other species of the genus. Thorax and scutellum black, the shoulders and

the thoracic dorsum before the transverse suture whitish-grey, with four black stripes, the outer stripes

much broader than the others. Abdomen short-conical, black; second and following segments with

’ whitish front borders and with long marginal and somewhat shorter discal macrochetz. Legs black ;

middle tibis with some long bristles; hind tibie outwardly with several bristles of unequal length.

Tegule whitish. Wings greyish-hyaline ; small cross-vein a little before the middle of the discal cell;

curvature of the fourth vein with a rounded angle; apical cell attenuated near its end and narrowly

opened just before the wing’s tip; apical cross-vein straight, only a little concave at its end; posterior

cross-vein curved outwards at its lower part.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single female specimen.

10. Didyma prompta, sp. n., ¢ 9.

Blackish ; thorax anteriorly greyish, with indistinct stripes; abdominal segments with white front borders

and short macrocheete.

Length 5-5°5 millim.

Head blackish; front in both sexes scarcely as broad as the eyes, with parallel sides; frontal band black,

BIOL. CENTR.-AMER., Dipt., Vol. II., June 1890. y

162 DIPTERA.

broader than the lateral portions ; frontal bristles descending to a little beneath the root of the antenne ;

cheeks narrow; eyes densely clothed with a whitish pile. Antenne black, descending to the vibrisse ;

second joint with short bristles; third joint four or five times as long as the second ; arista thickened to

its proximal third. Proboscis and palpi black, the palpi with a clearer, somewhat rufous tip. Thorax

black, before the transverse suture with some grey tomentum and four black stripes, which, however, are

not always distinct. Abdomen conical, black, with the front borders of the second and following segments

white ; on the second and third segments the white colour is interrupted by a black dorsal stripe; the

macrocheete are very short, the discal ones sometimes inconspicuous. Legs black ; front tibie outwardly

with a row of short bristles; middle tibie with some long bristles; hind tibie outwardly nearly fringe-

like with bristles; foot-claws and pulvilli short in both sexes. Tegule whitish. Wings nearly hyaline ,

small cross-vein on the middle or just before the middle of the discal cell; apical cross-vein straight ;

posterior cross-vein very slightly curved.

Hab. Mexico, Venta de Zopilote 2800 feet, Amula 6000 feet, both in Guerrero

(H. H. Smith).

A male and two female specimens.

11. Didyma pullula, sp. n., 2.

Blackish ; thorax cinereous, with black stripes; abdomen with whitish reflecting spots and with discal and

marginal macrochete ; palpi rufous.

Length 4°5 millim.

Front cinereous, slightly prominent, much broader than the eyes; frontal band a little narrower than the

lateral portions; frontal bristles descending as far as the end of the second antennal joint; face and

cheeks whitish ; eyes distinctly pilose. Antenne black, shorter than the face; second joint bristly ;

third joint rather broad, four times as long as the second; arista thickened to its proximal half. Pro-

boscis black; palpi pale rufous. Thorax greyish-cinereous, with four black stripes, the intermediate

stripes very distinct before the transverse suture ; scutellum black, its hind margin slightly testaceous.

Abdomen ovate, shining black, with whitish reflecting spots, chiefly on the front borders of the second

and following segments ; discal and marginal macrocheete are present, but the marginal ones are longer

than the others. Legs black ; middle tibiz with some long bristles; hind tibie outwardly with bristles

of unequal length. Tegule whitish. Wings with a brownish-grey tint, which is more intense towards

the base ; the veins strong; small cross-vein slightly infuscated, inserted before the middle of the discal

cell; curvature of the fourth vein angular ; apical cross-vein curved ; posterior cross-vein nearly straight,

inserted much nearer to the curvature of the fourth vein than to the small cross-vein.

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith).

A single female specimen.

12. Didyma albomicans, sp. n.,¢ ¢.

Black ; thorax grey, with four black stripes; abdomen with white reflecting spots and with discal and

marginal macrochete ; palpi rufous.

Length 3°5-5 millim.

Head whitish-grey ; front as broad as the eyes; frontal band black, a little narrower than the lateral portions ;

frontal bristles descending as far as the end of the second antennal joint; facial bristles mounting to the

same point. Eyes with a weak pile, and descending as far as the tip of the antenne. Vibrisse inserted

a little above the oral margin. Antenne shorter than the face; third joint four times as long as the

second ; arista thickened to the proximal half. Thorax with grey tomentum, which appears chiefly on

the sides and anteriorly ; four black stripes are rather distinct before the transverse suture. Abdomen

shining black, conical in the male, ovate in the female ; the whitish reflecting spots chiefly on the front

borders of the second and following segments; the macrochete of moderate length. Legs black, bristly ;

DIDYMA. 163

hind tibiz outwardly with several bristles of unequal length ; foot-claws and pulvilli short in both sexes.

Tegule and wings greyish-hyaline ; small cross-vein a little before the middle of the discal cell; apical

cross-vein nearly straight; posterior cross-vein slightly curved inwards.

Hab. Mexico, Xucumanatlan 7000 feet, Omilteme 8000 feet, and Sierra de las

Aguas Escondidas 9500 feet, all in Guerrero (H. H. Smith), Orizaba (F. D. G. &

H. H. Smith).

A male and several female specimens.

13. Didyma inconspicua, sp. n., 2.

Yellowish-cinereous ; four thoracic stripes, reflecting spots and a dorsal stripe on the abdomen, antennx, and

Length 4°5 millim.

Front yellowish-cinereous, broader than the eyes; frontal band brown, narrower than the lateral portions, but

not always conspicuous ; frontal bristles few in number, descending beneath the second antennal joint;

face and cheeks greyish-white ; eyes thinly pilose. Antenne a little shorter than the face; second joint

bristly ; third joint four times as long as the second; arista thickened to its proximal half. Proboscis

black ; palpi rufous. Thoracic dorsum yellowish-cinereous, with four black stripes—the median stripes

distant from each other and much narrower than the outer ones; behind the transverse suture the stripes

disappear in a more general black coloration, which, however, is not extended to the hind margin of the

thorax ; pleurs grey ; scutellum black, with a cinereous hind border. Abdomen ovate, flattened ; first

segment black ; the following segments cinereous, with black reflecting spots, chiefly on the hind borders

of the segments ; on the second segment the black colour has a larger extension and the light colour is

reduced to a narrow whitish front margin ; the two intermediate segments have a black dorsal stripe and

short marginal macrochete ; on the posterior half of the anal segment several short macrochete are

irregularly placed. Front tibie outwardly with a row of short bristles; middle tibie with some long

bristles ; hind tibie with several bristles of unequal length; foot-claws and pulvilli short. Tegule

white. Wings nearly hyaline; small cross-vein on the middle or just before the middle of the discal

cell; apical cell narrowly opened a little before the wing’s tip ; apical cross-vein nearly straight ; posterior

cross-vein slightly curved.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen.

14. Didyma commixta, sp. n. ( 2 2).

Shining black; thorax anteriorly grey, with four black stripes; abdomen with whitish front borders to the

segments ; no discal macrochete ; palpi black.

Length 5:5 millim.

Nearly allied to D. nagricolor and D. albomicans, and having some of the characters in common with the one or

the other. Asin D. albomicans, the front is as broad as the eyes, the thorax has before the transverse

suture some grey tomentum and four black stripes (which, however, are not very distinct), and the

posterior cross-vein is slightly curved. Resembling D. nigricolor in having the head very obscure, the

palpi black, and the abdomen densely pilose and without discal macrochete ; but differing from it in the

marginal macrochete being longer, and, therefore, more conspicuous. The bristles on the outside of the

hind tibie are nearly fringe-like.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single specimen, apparently a female.

Another example, from Vera Cruz (H. H. Smith), may be considered as a variety of

— D. commixta. It is smaller in size (3°5 millim.), and differs in having a grey head and

y 2

legs black; palpi rufous ; abdomen with short marginal and no discal macrochete. Yd vce lore. 9 ?

Jp uC

Ayo

164 DIPTERA.

thorax, the former with the frontal band black and the latter with more distinct black

stripes, the pilosity of the eyes very inconspicuous (only visible under a strong lens),

and the front borders of the abdominal segments with broader white reflections. In

general, it has more the aspect of D. albomicans ; but, owing to the absence of discal

macrocheete, it cannot be identified with that species.

15. Didyma fuliginipennis, sp. n., 3.

Head whitish ; thorax cinereous, with black stripes ; abdomen black, with white front borders to the segments ;

no discal macrochete; antenne, palpi, and legs black; wings brownish.

Length 4:5 millim.

Front cinereous, with whitish reflections, narrowed behind and there as broad as the eyes ; frontal band black,

as broad as the lateral portions; frontal bristles somewhat irregular, but descending on each side in a

single row to beneath the second antennal joint; face and cheeks whitish; eyes densely clothed with a

weak pile ; vibrisse inserted at the oral margin. Antenne shorter than the face ; third joint five times

as long as the second; arista thickened to the proximal third. Proboscis and palpi black. Thorax

cinereous, with four black stripes, the intermediate stripes linear and more distinct ; scutellum black.

Abdomen elliptical, shining black ; the second and following segments with white front borders, which,

at the middle, are interrupted by a black dorsal stripe ; long macrochsete are on the hind margins of the

second and third segments; on the anal segment the macrochextx are shorter, but more numerous.

Middle tibisee with some long bristles; hind tibie outwardly with several bristles of unequal length ;

foot-claws and pulvilli a little elongate, the pulvilli yellowish-grey. Tegule whitish. Wings with a

brownish-grey tint, more obscure towards the costa; small cross-vein distinctly before the middle of the

discal cell; apical cross-vein straight ; posterior cross-vein slightly curved.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single male specimen.

16. Didyma validinervis, sp.n., 3 °.

Blackish ; thorax grey, with four black stripes ; abdomen with whitish reflections and white front margins to

the segments; no discal macrochete ; wings with strong veins; apical cross-vein concave.

o Length 6-7 millim.

Head grey, with whitish reflections ; front narrowed behind and there narrower than the eyes, in the female

a little broader; frontal band black, as broad as the lateral portions ; frontal bristles forming on each

side a nearly continuous row with the bristles on the facial ridges; eyes thinly pilose ; beard white.

Antenne black, a little shorter than the face ; third joint five times as long as the second ; arista thickened

to the proximal half. Proboscis and palpi_black, the palpi filiform. Thorax greyish, with four equal

broad, black stripes, the outer stripes interrupted at the transverse suture ; scutellum greyish-black.

Abdomen elliptical in the male, ovate and more flattened in the female ; first segment black, laterally

with a whitish reflection ; the following segments black, with narrow white front margins and some

whitish reflecting spots; on the hind margins of the segments are long macrochete. Legs black ; front

tibiee outwardly with a bristle; middle tibiee with some long bristles; hind tibiz with several scattered

bristles. Tegule yellowish-white. Wings with a brownish-grey tint, more intense towards the base

and costa; the veins strong and somewhat infuscated ; small cross-vein on the middle of the discal cell ;

curvature of the fourth vein rectangular; apical cross-vein distinctly concave; the second section of the

fourth vein (between the small and posterior cross-veins) slightly bent upwards; posterior cross-vein

curved.

Hab. Mexico, Xucumanatlan, Omilteme, and Sierra de las Aguas Escondidas, all

in Guerrero, 7000 to 9500 feet (H. H. Smith).

Several specimens of each sex.

DIDYMA.—NEOPTERA. 165

17. Didyma pavida, sp. n., 3 9.

Blackish ; thorax cinereous, with black lines ; front borders of the second and third abdominal segments with .

scarcely any white reflections ; no discal macrochxta.

Length 4:5-5°5 millim.

Head blackish, with white reflections ; front narrower than the eyes; frontal band black, narrower than the

lateral portions; frontal bristles descending as far as the end of the second antennal joint; eyes distinctly

pilose. Antenne black; third joint four times as long as the second ; arista thickened to the proximal

half. Proboscis black; palpi pale rufous. Thorax blackish ; thoracic dorsum with a cinereous tomentum

and four black lines, which are less distinct behind the transverse suture; scutellum black. Abdomen

ovate (a little broader in the female), shining black ; second and third segments with some whitish reflec-

tions on the front borders; all the segments with marginal macrochete. Legs black; middle tibic with

some long bristles ; hind tibie outwardly with bristles of unequal length ; foot-claws and pulvilli short in

both sexes. Tegule greyish-white. Wings greyish-hyaline; small cross-vein on the middle of the discal

cell; third vein slightly curved before its end; apical cross-vein straight, only a little concave near the

tip; posterior cross-vein straight ( g ) or somewhat curved ( ? ), inserted beyond the middle between the

small cross-vein and the curvature of the fourth vein.

Hab. Mexico, Venta de Zopilote 2800 feet, and Amula 6000 feet, both in Guerrero

(H. H. Smith).

A male and a female specimen.

18. Didyma volucris, sp. n., 3 ?.

Blackish ; thorax cinereous, with black stripes; abdominal segments with whitish front borders; no discal

macrocheete on the intermediate segments ; palpi rufous.

Length 6—7 millim.

Front cinereous, slightly prominent, as broad as the eyes; frontal band black, narrower than the lateral

portions, sometimes inconspicuous in a grey reflection ; frontal bristles descending to beneath the second

antennal joint ; face and cheeks whitish ; eyes thinly pilose. Antenne black; second joint with short

bristles ; third joint five times as long as the second; arista thickened to the proximal half. Proboscis

black, the terminal lips with yellow hairs; palpi rufous. Thorax cinereous, with four black stripes, the

outer stripes interrupted at the transverse suture; scutellum black, with the hind margin grey. Abdo-

men conical, black ; second and following segments with white front borders (the white colour laterally

more extended) and with long marginal macrocheetee ; in the male the anal segment has a few macro-

cheetee on the disc and several round the anus (the discal ones are absent in the female). Legs black ;

middle tibiz with some long bristles ; hind tibie outwardly with bristles of unequal length ; in the male

the foot-claws and pulvilli are a little longer than in the female, the pulvilli yellow. Tegule whitish.

Wings dilute brownish (¢) or greyish-hyaline (@); small cross-vein a little before the middle of the

discal cell; apical cross-vein straight or nearly straight ; posterior cross-vein slightly curved inwards.

Hab. Mexico, Venta de Zopilote 2800 feet, and Omilteme 8000 feet, both in Guer-

rero (H. H. Smith).

A male and a female specimen.

NEOPTERA, gen. nov. *

Body short and broad. Head hemispherical; front narrowed behind; frontal band inconspicuous; frontal

bristles reduced to short hairs ; face perpendicular; oral margin not prominent ; cheeks rather broad ; no

distinct vibrissee, but the underside of the face with many weak hairs. Eyes bare. Antenne short;

* yéos (singular), rrépov (wing).

166 DIPTERA.

' second joint prominent, with some bristles ; third joint oval, a little longer than the second; arista bare.

Thorax and hind margin of the scutellum with rather weak bristles. Abdomen convex, broadly ovate,

composed of four visible segments, a fifth segment being bent close to the venter; on the third and fourth

segments some hairs, which can scarcely be called macrochete. Legs with weak bristles. Tegule large.

Wings of the male unusually broad, the coste rounded; auxiliary vein short; first vein ending in a

slightly elevated callosity almost in the middle of the costa; the second vein at its basal part very near

the first, close to the costa outwardly but midway enlarged into a callosity just under the costal callosity ;

the following veins, on the contrary, are pressed downwards ; the third vein is deeply arcuated, in con-

sequence of which the subcostal cell is unusually broad in the middle; the subcostal cell has a longitudinal

false vein or fold; the curvature of the fourth vein forms a right angle, and the apical cross-vein is

slightly concave; the apical and discal cells are oblong and rather narrow, the former narrowly opened

at or a little before the wing’s tip; the small cross-vein is on the middle of the discal cell, the posterior

cross-vein on two-thirds of the apical cell.

In the female the wings are more normal.

1. Neoptera rufa, sp.n.,¢ 9. (Tab. IV. figg. 11,3; lla, wing; 11 4, head in

profile; llc, head from in front, ¢: 12, wing; 12a, head from in front, ? .)

Length 6 millim.

Ferruginous, including the antenna, legs, and tegule ; the tarsi very slightly infuscated ; the foot-claws and

pulvilli short in both sexes (but the male is recognizable, apart from its abnormal wings, by the narrower

front). Wings subhyaline; the veins near the costa (and in the male also the callosities) yellowish ; the

small cross-vein slightly infuscated.

Hab. Mzxico, Vera Cruz, Teapa in Tabasco (H. H. Smith).

A male specimen from the former, a female from the latter locality.

CENOSOMA, gen. nov.*

Head nearly hemispherical; front of the male narrower behind, of the female very broad ; frontal bristles

weak, not descending beneath the root of the antennz ; ocellar knob very conspicuous; face perpendicular,

- without bristles ; oral margin not prominent; cheeks broad ; eyes bare; no distinct vibrisse, but several

short bristles at the oral margin. Antenne as in Neoptera. Thorax and hind margin of the scutellum

with weak bristles. Abdomen convex, elongate-oval, transparent, with marginal macrochete but without

discal ones on the second and following segments. Legs rather short, with weak bristles ; foot-claws and

pulvilli not elongate in the male. Tegule large. Wings with a costal spine; apical cell narrowly opened

at the wing’s tip; second vein at nearly the same distance from the costa and from the third vein ; small

cross-vein on the middle of the discal cell; posterior cross-vein in the middle between the small cross-vein

and the curvature of the fourth vein.

This genus is closely allied to Neoptera; the shape of the head is very similar; the

abdomen, however, is somewhat more elongate and its macrochete are more normal ;

moreover, the wings are not dilated in the male, and the second vein is in the usual

position (not close to the costa).

* xevos (empty), cdma (body).

CENOSOMA.—TELOTHYRIA. 167

1. Cenosoma, signifera, sp. n., 3 2. (Tab. IV. figg. 13, ¢; 134, head in

profile.)

Rufous ; ocellar knob, some spots on the abdomen, and, in the male, two points on the thorax, black; wings

with oblique brown bands.

Length nearly 5 millim.

Shining rufous; the abdomen paler and more transparent ; the bristles, without exception, black ; frontal band

inconspicuous ; the black points on the thorax of the male are behind the transverse suture, in the female

they are absent. Abdominal dorsum with black spots on the hind margins of the segments, the spots

on the first and second segments forming in the male a transverse stripe—in the female there is no spot

on the first segment, and that on the second is triangular ;—the second and following segments also with

lateral spots on the hind margin; male genital parts somewhat prominent. Tegule rufous. Wings

yellowish at the base and costa; a brown oblique band runs from the humeral cross-vein along the fifth

vein, covering the inferior basal cells ; a second band commences at the costa in the mediastinal cell and

runs, covering the small cross-vein, obliquely to the hind margin, where it is united with the first band ;

a more perpendicular and broader band near the extremity of the wing, beginning at the end of the

second vein ; apical cross-vein distinctly curved ; posterior cross-vein straight.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet, Atoyac in Vera Cruz (Hl.

Smith).

A female from the former, a male from the latter locality.

TELOTHYRIA, gen. nov.*

Front rather narrow, not prominent; face perpendicular; cheeks narrow ; facial ridges without bristles ;

vibrisse inserted at some distance above the oral margin, which is not prominent. Eyes bare, descending

beneath the vibriss#. Antenne shorter than the face; third joint at least twice as long as the second ;

arista bare or sometimes microscopically pubescent, not visibly jointed. Proboscis exserted ; palpi fili-

form or slightly thickened towards the tip. Abdomen conical or ovate; first segment usually shorter

than the second ; macrochete on the hind margins of the segments, sometimes also on the disc. Legs

moderately long and bristly. Wings longer than the abdomen, seldom with a costal spine ; apical cell

opened at or just before the wing’s tip; curvature of the fourth vein angular.

This genus agrees with Mystacelia and Brachycoma in having the vibrisse inserted

at a certain distance above the oral margin; but differs from both by the apical cell

ending near the wing’s tip; from Mystacella, moreover, by the eyes not being hairy, and

by a more conical and less broad shape of the abdomen. Generally, the species of

Telothyria are of a much smaller size than those of either Mystacella or Brachycoma.

The following Central-American species are here referred to Telothyria :—

1. Legs wholly or for the greater part rufous . . .... . 2

Legsblack. 2. 2. 2. 2... ra 63

2. Abdomen with discal and marginal macrochetz (wings brownish

at the end of the costa). . . . . 1. 2. 1. 1 1. . mubecula,v. d. Wulp. | 7 D

Abdomen only with marginal macrochete (sometimes the

macrochete little developed) . . 2. 2... 1 ee we 8

3. Thorax with macrochetz and black hairs, the latter sometimes

almost obsolete. 2. 2. 2. 2... we ee ee

* rédos (apex), Oupis (cell).

168

13.

14.

15.

16.

17.

18.

19.

DIPTERA.

Thorax thickly clothed with yellowish pile .

. Antenne rufous; abdomen pale yellow (macrochzetz very weak

and short) .

Antennez black; abdomen cinereous .

. Frontal band black .

Frontal band rufous

. Macrocheetze of the abdomen very short, inconspicuous among

the dense pilosity. . . woe eee

Macrocheetz of the abdomen always distinct

. Hind tibiz outwardly fringed with bristles of equal length .

Hind tibia outwardly with a row of bristles, among which a

longer one appears below the middle .

Abdomen with discal and marginal macrochete .

Abdomen with marginal macrochetz only .

. Small cross-vein on the middle or nearly on the middle of the

discal cell . . . .

Small cross-vein distinctly before the middle of the discal cell.

. Thorax black, not striped

Thorax with more or less distinct stripes .

. Apical cross-vein nearly straight ; posterior cross-vein concave .

Apical cross-vein concave ; posterior cross-vein straight .

. Thoracic stripes, at least the outer ones, prolonged behind the

transverse suture; larger species (7°5 millim. or more) .

Thoracic stripes only conspicuous before the transverse suture ;

smaller species (6 millim. or less)

Head ochraceous; anusrufous. . ... . Lo

Head silvery-white; anus black 2 8 ww

Thorax with three stripes (the two intermediate stripes being

united to a broad black band)

Thorax with four stripes .

Wings brownish er

Wings hyaline or nearly hyaline Loe woe ee

Abdomen laterally yellowish and somewhat transparent .

Abdomen without any yellow coloration . woe

The white front borders of the abdominal segments interrupted

by a black dorsal stripe oe .

The white front borders of the abdominal segments not inter-

rupted by a black dorsal stripe . . .

Dorsal macrochetz of the anal segment much shorter than

those of the preceding segments (only some longer ones at

the tip and beneath) . . . ee

Dorsal macrochetze of the anal segment as long as those of the

preceding segments . .

Posterior cross-vein nearly straight

Posterior cross-vein distinctly curved .

adscripta, v.d. Wulp. / 70

disgrega, v.d. Wulp. /7 |

relicta, v.d. Wulp. ) 7 |

rufostriata, v.d. Wulp. ; 7

fimbricrura, v. d. Wulp. ) 77

connexa, v. d. Wulp. / 7 %

30.

10.

20.

11.

12.

humeralis, v. d. Wulp.

hamata, v. d. Wulp.

{2%

138.

14.

pollens, v. d. Wulp.

forticula, v. d. Wulp.

iid

174

trifurca, v. d. Wulp. | 75~

15.

rasilis, v. d. Wulp.

16. ©

vaciva, v. d. Wulp. } 7 &

17.

17 S~

18.

19.

dissepta, v.d. Wulp. / ? L

recondita, v.d. Wulp. /?

comata, v. d. Wulp. 195

curva, v. d. Wulp. 74

20.

21.

22.

23.

24.

25.

26.

27.

28.

29.

30.

al.

32.

33.

34.

35.

TELOTHYRIA.

Thorax whitish-grey, without stripes .

Thorax blackish or cinereous, with more or less distinct stripes .

Wings with a small costal spine

Wings without a costal spine

Thorax black, only anteriorly with some grey tomentum and

obsolete stripes

Thorax greyish, cinereous, or ochraceous, with distinct black

stripes .

Palpi black

Palpi rufous, or at least with a rufous tip

Abdomen (3) laterally yellowish and somewhat transparent .

Abdomen without yellow coloration

Head ochraceous or yellowish

Head grey or whitish . oe

Abdomen cinereous with black markings

Abdomen blackish with grey reflections .

White front borders of the abdominal segments very narrow and

little conspicuous

White front borders of the abdominal ‘segments broad and

distinct .

Thoracic stripes unequal (the intermediate stripes linear, the

outer ones much broader) .

Thoracic stripes linear, the outer ones scarcely broader .

Abdomen conical, the ventral side carinated

Abdomen ovate, not carinated .

Fourth section of the costal vein (between the end of the first

and that of the second vein) as long as the third section (be-

tween the end of the auxiliary and that of the first vein)

Fourth section of the costal vein longer than the third section.

Thorax light grey, with indistinct black lines; dorsal macro-

cheetze on the hind margins of the third and anal segments .

Thorax cinereous, with distinct black stripes;

cheetz only on the anal segment

Apical cell broadly opened ; small cross-vein “oblique, before

the middle of the mediastinal cell

Apical cell narrowly opened ; small cross-vein perpendicular,

under the middle of the mediastinal cell .

Frontal bristles inserted close to the inner orbits of the eyes ;

frontal band absent .

Frontal bristles inserted as usual close to the frontal band,

which is always present

Palpi black

Palpi rufous . . . .

Abdomen carinated on the ventr al side .

Abdomen not carinated

BIOL. CENTR.-AMER., Dipt., Vol. IL., Tune 1890.

dorsal macro-

169

lugens, v.d. Wulp. / 77

21. .

costalis, vy. d. Wulp. | 7

22.

Doe

rava,v.d. Wulp. / /%

23.

striolata, v. d. Wulp. 174

24.

fasciata, v. d. Wulp. 174

25.

26.

27.

ochrifrons, v. d. Wulp. | 50

murina,v.d. Wulp. | &O

assimulata, v. d. Wulp. } KO

28.

remota, v. d. Wulp. | <)

29. .

sublineata, v. d. Wulp. 1G]

ovata, v.d. Wulp. |} § 2

3l.

33.

cupreiventris, v. d. Wulp. cake Coe / om

32.

placida, v. d. Wulp. K ee

illucens, v. a. Wulp. | §

12+

argentifrons, v. d. Wulp. '

34.

occulta, v. d. Wulp. / a

35.

36.

37.

170 DIPTERA.

36. Anus shining black. . . 2 2. 1 ee ee ee + + Carinata, v.d. Wulp. | gu

Anus red or with a reddish margin. . . . + + + + + + vicina,v.d. Wulp. ) §4

37. Wings with a short costal spine; posterior cross-vein in the

middle between the small cross-vein and the curvation of the .

fourth vein . . Coe ee ee ee ee ee refuga, v. a. Wulp. / %4

Wings without a costal spine; posterior cross-vein nearer to a

the curvation of the fourth vein . . . . . . + + + pacata,v.d. Wulp. BS

1. Telothyria nubecula, sp. n., 2.

Blackish; thorax with white reflections; abdomen brownish-testaceous; antenne, palpi, and legs rufous

wings with a diffuse brownish spot at the end of the costa.

Length 5°5 millim.

Head whitish-grey ; front much narrower than the eyes; frontal band brown, with grey reflection ; frontal

bristles rather stout, not descending beneath the root of the antennw ; vibrisse stout, at some distance

above the oral margin. Antenne rufous; third joint three times as long as the second, its front margin

and tip brownish; arista slightly thickened and rufous at the base. Palpi and terminal lips of the

proboscis rufous, the palpi filiform. Thorax black, the shoulders, pleure, and hind margin with a white

or greyish-white reflection ; transverse suture and two longitudinal stripes before it white; scutellum

blackish. Abdomen ovate, truncated at the tip, testaceous, blackish-brown on the dorsal'side, with some

grey reflections and narrow white front borders to the second and following segments; discal and marginal

macrochete present; ventral surface wholly testaceous. Legs rufous, with black tarsi; hind tibie out-

wardly with two, posteriorly with three, rather long bristles. Tegule and wings greyish, at the end of the

costa dilute brown; third vein slightly curved before its end; curvature of the fourth vein nearly

rectangular ; small cross-vein on the middle of the discal cell; apical and posterior cross-veins distinctly

curved.

Hab. Muxico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

2. Telothyria adscripta, sp. n., 2.

Cinereous; abdomen yellowish, with blackish dorsal spots and blackish hind borders to the segments; antenna,

palpi, and legs (the latter for the greater part) rufous.

Length 5:5 millim.

Front narrowed behind, and there half as broad as the eyes; frontal band blackish-brown, broader than the

lateral portions ; frontal bristles short, descending as far as the end of the second antennal joint; cheeks

with a rufous reflection. Eyes with a rather large reticulation. Antenne rufous; second joint with

black bristles; third joint three times as long as the second; arista microscopically pubescent, thickened

and rufous at the base. Proboscis blackish-brown ; palpi elongate, pale rufous, slightly thickened towards

the tip. Thorax cinereous, with four blackish stripes, which sometimes are inconspicuous and interrupted

at the transverse suture; scutellum yellowish-cinereous, Abdomen ovate, pointed towards the anus; the

first and second segments yellow, the two other segments yellowish-cinereous; all the segments, except

the anal, have blackish-brown hind margins; a dorsal stripe on the first segment and dorsal spots on the

second and third segments are of the same colour; macrochete are scarcely visible among the rather long,

black pile, which covers the whole surface of the abdomen. Legs rufous; base of the femora blackish-

brown ; hind tibie brownish ; all the tarsi black; posterior tibie with some long bristles. Tegule

yellowish-white. Wings greyish-hyaline; small cross-vein on the middle of the discal cell; curvature

of the fourth vein somewhat rounded; apical and posterior cross-veins curved.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

TELOTHYRIA. 171

8. Telothyria disgrega, sp. n.,¢°.

Cinereous; antenn, thoracic stripes, and reflections on the abdomen blackish; palpi and legs rufous; no discal

macrocheetee.

Length 7°5 millim.

Head cinereous, with white reflections, the part of the cheeks below the eyes with a rufous reflection;

front much broader than the eyes; frontal band nearly as broad as the lateral portions, blackish-brown,

immediately before the antennsz somewhat rufous; frontal bristles descending on each side in a single

- row as far as the end of the second antennal joint; eyes not fully descending to the vibrisse. Antenne

distinctly shorter than the face; the basal joints showing a tendency to become rufous; third joint

blackish, nearly three times as long as the second; arista tapering towards the end. Proboscis black, its

terminal lips rufous; palpi rufous, slightly thickened towards the tip. Thorax and scutellum cinereous ;

thoracic dorsum with four black stripes,—the intermediate stripes linear, the outer ones interrupted at

the transverse suture. Abdomen ovate, convex; first segment black; the following segments cinereous,

with blackish-brown reflections, and (when viewed in some positions) narrow whitish front margins;

macrochetz on the hind margins of the first, second, and third segments, and several, more irregularly

placed, on the anal segment. Femora rufous; tibie dark rufous; tarsi black; middle tibie with some

long bristles; hind tibie outwardly with bristles of unequal length; foot-claws and pulvilli short.

Tegule whitish. Wings greyish-hyaline; small cross-vein a little before the middle of the discal cell;

curvature of the fourth vein nearly rectangular; apical cross-vein concave; posterior cross-vein slightly

curved.

Hab. Mexico, Amula in Guerrero 6000 feet (7. H. Smith).

This species closely resembles Myohia succincta,?; but differs from it by the

broader front.

4, Telothyria relicta, sp. n.,¢.

Head white ; frontal band black; thorax cinereous, with four black stripes ; abdomen black, with yellowish

incisions, laterally and at the tip rufous; palpi, femora, and base of the antenne rufous.

Length 8 millim.

Front a little narrower than the eyes, with a cinereous reflection; frontal band narrower than the lateral

portions. Antenne rufous, the third joint on the fore side and towards the tip brown ; arista thickened

to the proximal half. Proboscis black, with the terminal lips reddish; palpi pale rufous, distinctly

thickened towards the tip. Thorax yellowish-cinereous, with four linear black stripes; scutellum of the

same colour as the thorax, its hind margin slightly rufous; pleurs densely beset with a yellowish pile.

Abdomen black, with narrow yellowish front borders to the second and following segments; the first and

second segments laterally rufous, the anal segment almost wholly of that colour ; long macrochete are on

the hind margins of the second and following segments ; on the third segment there is also a pair of discal

macrochete, but these are very short and less conspicuous. Front legs rufous; the middle and hind legs

have the proximal part of the femora rufous, for the rest they are black or piceous ; all the tarsi are black ;

the tibize have some rather long bristles, those of the middle pair not being longer than the others; foot-

claws and pulvilli short. Tegule greyish, with a white border. Wings greyish-hyaline, slightly yellowish

along the costa; curvature of the fourth vein nearly rectangular; small cross-vein on the middle of the

discal cell ; apical and posterior cross-veins slightly curved, the latter beyond the middle between the small

cross-vein and the curvature of the fourth vein.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

172 DIPTERA.

5. Telothyria rufostriata, sp. n., 3 °.

Yellowish or rufous; frontal band pale rufous; abdomen with a black dorsal band and white front margins to

the segments; antennae, palpi, and femora rufous.

Length 6°5—7°5 millim.

$. Head ochraceous, with a silvery-white reflection ; front narrower than the eyes; frontal band pale rufous ;

frontal bristles short, descending as far as the second antennal joint; vibrisse accompanied by some

shorter bristles. Antenne rufous; second joint with black bristles; third joint three times as long as

the second, slightly infuscated towards the tip; arista black, thickened at the base, microscopically

pubescent. Proboscis black, with the terminal lips rufous; palpi short, pale rufous, slightly thickened

towards the tip. Thorax thickly clothed with a yellowish pile, with four scarcely visible black lines ;

pleure light grey; scutellum yellowish-rufous. Abdomen conical, yellowish-rufous ; first segment black

in the middle; second and third segments with a black dorsal band, which is a little enlarged on the

hind margin of the second segment, and on the third is united with the black posterior border, both

these segments having a narrow white front margin; anal segment whitish in front, black for the rest,

the anus itself rufous; macrochete are only at the hind margins of the last two segments, a lateral one

also on the second segment. Legs rufous, the tibiz brownish, the tarsi black ; coxe densely clothed with

a whitish pile; hind tibia outwardly with a row of short bristles, and with some longer bristles on the

inner and outer sides at the middle; foot-claws and pulvilli short. Tegule whitish. Wings hyaline,

not longer than the abdomen; small cross-vein oblique, on the middle of the discal cell; apical and

posterior cross-veins curved.

Q. Face and cheeks of a pure white: the front yellowish, as broad as the eyes; the third antennal joint

blackish towards the tip; the pilosity of the thorax shorter, and the black lines more conspicuous ; the

abdomen, including the anal segment, rufous, with a similar black pattern to that of the male; the hind

femora blackish towards the tip, and the middle and hind tibie nearly as black as the tarsi.

Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (4. H. Smith).

A male specimen from the latter, a female from the former locality.

Closely allied to 7. relicta, but differing by the rufous colour of the abdomen and

of the frontal band.

6. Telothyria fimbricrura, sp. n., 3.

Black; the abdomen partly with yellowish tomentum ; macrochete very short; hind tibie outwardly fringed

with bristles.

Length 7:5 millim. (one of the examples not more than 5-°5 millim.),

Head pale ochraceous, sometimes the face and cheeks more whitish; front narrowed behind, scarcely as broad

as the eyes; frontal band black, narrower than the lateral portions; frontal bristles descending as far as

the end of the second antennal joint; eyes descending to the vibrisse. Antenne black; second joint

bristly ; third joint four times as long as the second; arista thickened in its proximal half. Proboscis

black; palpi rufous. Thorax and scutellum shining black, sometimes the thorax anteriorly greyish with

indistinct black stripes. Abdomen ovate, black, laterally more or less rufous, and somewhat transparent ;

second segment covered with a sericeous-yellowish tomentum (in some specimens this tomentum has a

greyer tint, and is interrupted by blackish spots); macrochete very short, and often inconspicuous

among the dense black pile of the abdomen. Legs black; middle tibis with two rather long bristles ;

hind tibise outwardly fringed with bristles of equal length; foot-claws and pulvilli short. Tegule

yellowish. Wings greyish-hyaline ; small cross-vein on or a little before the middle of the discal cell -

apical cross-vein straight; posterior cross-vein slightly curved.

Hab. Mexico, Venta de Zopilote 2800 feet and Amula 6000 feet, both in Guerrero

(H. H. Smith).

TELOTHYRIA. 173

Three specimens, which I regard as males, owing to the front being narrowed behind,

though the foot-claws and pulvilli are short.

7. Telothyria connexa, sp. n.,<.

Black ; head white; thoracic dorsum cinereous, with four black stripes; intermediate abdominal segments

partly with cinereous tomentum; macrochete very short ; hind tibiz outwardly fringe-like with bristles,

and with a longer bristle below the middle ; palpi rufous.

Length 5°5-6 millim.

Allied to 7. fimbricrura, but differing in some essential respects:—The head is white, and even somewhat

silvery ; the thoracic dorsum has more grey tomentum and four distinct black stripes; the cinereous

tomentum on the second and third abdominal segments is not extended to the hind borders, which are

black; a black dorsal stripe is sometimes visible; on the outside of the hind tibiz a longer bristle arises

among the others. The black anal segment is very shining ; beneath it a pair of filiform prominences are

turned towards the venter.

Hab. Mexico, Venta de Zopilote 2800 feet and Amula 6000 feet, both in Guerrero

(H. H. Smith).

Three male specimens.

8. Telothyria humeralis, sp. n., 3.

Shining black ; humeral spots and reflections on the abdominal segments whitish ; palpi rufous; base and costa

of the wings brownish.

Length 4°5 millim.

Head whitish-grey ; front narrower than the eyes; frontal band black ; frontal bristles descending as far as

the end of the second antennal joint; vibrisse at a little distance above the oral margin. Antennse

black; third joint four times as long as the second; arista thickened to the proximal half. Proboscis

black ; palpi pale rufous. Thorax, scutellum, and abdomen shining black ; humeral spots, a band from

the shoulders to the middle coxm, and reflecting spots on the front borders of the second and third

abdominal segments whitish; abdomen subcylindrical, with conspicuous discal and marginal macrochete.

Legs black, bristly; hind tibie with several rather long bristles ; foot-claws and pulvilli elongate.

Tegule yellowish-cinereous. Wings greyish-hyaline, brownish at the base and along the costa; small

cross-vein on the middle of the discal cell; apical cross-vein nearly straight; posterior cross-vein concave.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A male specimen.

9. Telothyria hamata, sp. n.,<.

Black ; face, humeral spots, and narrow front margins to the abdominal segments white; palpi pale rufous ;

discal and marginal macrocheete present.

Length 3°25 millim.

Front narrow, blackish ; frontal band represented by a single groove, on each side of which the frontal bristles

are ranged in a curved row, reaching to beneath the root of the antenne. Face and cheeks bluish-white,

the cheeks narrow; eyes descending to the vibrisse, which are surmounted by some shorter bristles; beard

white. Antenne brownish-black; third joint nearly four times as long as the second ; arista thickened

to the middle and then suddenly becoming as fine as a hair. Proboscis black; palpi small, filiform, pale

rufous. Thorax and scutellum black, opaque ; on the shoulders a whitish spot, which on the outside is

prolonged backwards and united to a small white margin in the side of the transverse suture. Abdomen

conical, nearly cylindrical, shining black ; the front margins of the second and following segments narrowly

174 DIPTERA.

white; first segment with marginal, the others with discal and marginal, rather long macrochete ;

beneath the anus are two small curved spines, these turned towards the venter. Legs black, slender, the

front pair with the tarsi longer than the tibie ; middle tibise with some long bristles; hind tibie with

several long bristles; foot-claws and pulvilli slightly elongate, the pulvilli whitish. Tegule yellowish-

grey. Wings with a dilute brownish tint; small cross-vein on the middle of the discal cell; curvature of

the fourth vein rounded ; apical cell ending just at the wing’s tip; apical cross-vein concave; posterior

cross-vein in the middle between the small cross-vein and the curvation of the fourth vein.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

A single male specimen.

10. Telothyria pollens, sp. n., 3.

Cinereous; head ochraceous; thoracic stripes, hind borders of the abdominal segments, antennw, and legs

black ; anus and palpi rufous.

Length 8 millim.

Head pale ochraceous; front a little narrower than the eyes; frontal band brown, narrower than the lateral

portions and not reaching the vertex ; frontal bristles on each side in a single row, descending to beneath

the second antennal joint; eyes descending as far as the tip of the antenne ; vibrisse surmounted by

several bristles; beard whitish. Third joint of the antenne four times as long as the second; arista

thickened to the proximal half. Proboscis brown, the terminal lips with rufous hairs; palpi rufous,

cylindrical. Thorax and scutellum greyish-cinereous; thoracic dorsum with four black stripes, which are

prolonged behind the transverse suture, but do not reach the posterior margin of the thorax. Abdomen

conical, convex, light cinereous, at the sides slightly yellowish and transparent; first segment black, the

following two segments with blackish hind borders and a blackish dorsal stripe; anus rufous; discal and

marginal macrochete are present, but the discal ones are shorter than the others; ventral surface with

many hairs, those on the first segment yellowish, the others black. Legs black; middle tibia with some

long bristles ; hind tibice with bristles of unequal length; front tarsi not longer than the tibie ; foot-claws

and pulvilli elongate, the latter greyish. Wings nearly hyaline; small cross-vein on the middle of the

discal cell; curvature of the fourth vein with a blunt angle; apical cross-vein oblique and straight;

posterior cross-vein distinctly curved.

Hab. Mxxico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single male specimen.

11. Telothyria forticula, sp. n.,¢.

Cinereous; head silvery-white ; frontal band, thoracic stripes, broad hind borders to the abdominal segments,

antenne, and legs black; palpi rufous.

Length 7:5-9 millim.

Front as broad as the eyes; frontal band as broad as the lateral portions; frontal bristles on each side in a

curved row, descending as far as the end of the second antennal joint; cheeks rather broad, sometimes

with a dark reflection; vibrissee surmounted by some shorter bristles; eyes not fully descending to the

vibrisse ; beard white. Second joint of the antenne with some rough bristles ; third joint four times as

long as the second; arista thickened in its proximal half. Proboscis brown, its terminal lips rufous, with

yellow hairs; palpi cylindrical, rufous, with black hairs. Thorax and scutellum greyish-cinereous ;

thoracic dorsum with four black stripes (which are less distinct than in J. pollens, though also prolonged

behind the transverse suture), and anteriorly with a fifth (or median) stripe. Abdomen conical; first

segment black; the following segments cinereous, with black hind borders (viewed in some positions the

abdomen appears to be almost wholly black, with white front margins to the segments); discal and

marginal macrochete are present, the discal ones being scarcely shorter than the others. Front tibice

with short bristles; middle tibiee with some long bristles; hind tibis: outwardly with several bristles of

unequal length; foot-claws and pulvilli short. Tegule white. Wings with some greyish tint; small

TELOTHYRIA. 175

cross-vein on the middle of the discal cell ; curvature of the fourth vein with a blunt angle; apical cross-

vein nearly straight; posterior cross-vein slightly curved.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

Two female specimens.

In size and general facies this species agrees with 7. pollens; it cannot, however, be

the other sex of it, owing to the very different coloration of the head, the much less

defined thoracic stripes, and the more extended black parts of the abdomen.

12. Telothyria trifurca, sp. n., 2.

Black; thorax anteriorly grey, with three broad black bands; head and front borders of the abdominal

segments whitish; palpi rufous.

Length 4 millim.

Front as broad as the eyes; frontal band blackish-brown, nearly as broad as the whitish lateral portions;

frontal bristles on each side in a curved row, descending as far as the end of the second antennal joint ;

face and cheeks white, with dark reflections, the cheeks rather broad; above the vibrissw# a few other

bristles. Antenne black; second joint bristly ; third joint stout, four times as long as the second; arista

thickened to nearly half its length. Proboscis brown; palpi dark rufous. Thorax black, before the

transverse suture and at the sides with a whitish-grey tomentum, anteriorly with three broad black bands ;

scutellum black. Abdomen ovate, shining black; second and following segments with whitish front

borders, which are interrupted by a black dorsal stripe, and with discal and marginal macrochete of

moderate length. Legs black; middle tibie with some long bristles; hind tibie outwardly with bristles

of unequal length; foot-claws and pulvilli short. Tegule whitish. Wings with a brownish tint, which

is more intense towards the costa; small cross-vein nearly on the middle of the discal cell; apical and

posterior cross-veins straight or very slightly concave.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

Two female specimens.

13. Telothyria rasilis, sp. n., 3.

Black, pilose; thorax anteriorly grey, with four black stripes; abdominal segments with cinereous front

borders ; palpi with rufous tips ; wings brownish.

Length 5°5 millim.

Front blackish, narrower than the eyes; frontal band inconspicuous ; frontal bristles numerous, descending to

beneath the second antennal joint; face and cheeks whitish; eyes descending as far as the tip of the

antenne; vibrisse surmounted by some shorter bristles; beard white. Antenne black; second joint

bristly ; third joint slender, four times as long as the second; arista thickened to its proximal half.

Proboscis blackish-brown, its terminal lips with yellow hairs; palpi filiform, blackish, with rufous tips.

Thorax and scutellum shining black; thoracic dorsum before the transverse suture with some grey

tomentum and four black stripes. Abdomen conical, shining black, the front borders of the second and

following segments somewhat cinereous ; densely beset with black hairs and bearing many long discal and

marginal macrochete; the genitals appear as two pairs of small prominences, which are turned down

towards the venter. Legs black; middle and hind tibie with some long bristles; foot-claws and pulvilli

elongate, the pulvilli greyish. Tegule yellowish-grey. Wings with a brownish tint, which is more

intense at the base and along the costa; small cross-vein on the middle of the discal cell; curvature of

the fourth vein with a blunt angle ; apical cross-vein oblique and straight ; posterior cross-vein distinctly

curved.

Hab. Muxico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single male specimen.

176 DIPTERA.

14. Telothyria vaciva, sp. n., 3.

Blackish; thorax anteriorly whitish, with four black stripes; abdomen laterally somewhat yellowish and

transparent, the front borders of the segments whitish ; palpi rufous.

Length 4:5 millim. .

Front narrower than the eyes, especially on the vertex ; frontal band black, broad, the lateral portions of the

front white, linear; frontal bristles descending as far as the end of the second antennal joint ; face and

cheeks whitish ; vibrissee inserted at a considerable distance above the oral margin; eyes not descending

beneath the vibrisse ; beard white. Antenne black, distinctly shorter than the face ; second joint bristly ;

third joint four times as long as the second; arista thickened in its proximal half. Proboscis black ; palpi

pale rufous, scarcely thicker towards the tip. Thorax and scutellum black ; thoracic dorsum before the

transverse suture whitish, with four distinct black stripes, the outer stripes much broader than the median

ones; pleurz with some irregular whitish markings. Abdomen conical, shining black, the front borders

of the second and following segments whitish ; laterally yellowish-rufous and somewhat: transparent, this

pale coloration occupying the hind part of the first segment and, more broadly, that of the following two |

segments ; the anus has a narrow rufous margin; many long discal and marginal macrochete are present.

Legs black; posterior tibiee with rather long bristles ; foot-claws and pulvilli a little elongate, the pulvilli

yellowish. Tegule yellowish-grey. Wings with a dilute brownish tint, nearly hyaline ; small cross-vein

on the middle of the discal cell; curvature of the fourth vein with a blunt angle; apical cross-vein

straight ; posterior cross-vein slightly curved.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (7. H. Smith).

A single male specimen.

15. Telothyria dissepta, sp. n., 3.

Shining black; thorax anteriorly whitish-grey, with four black stripes; abdominal segments with whitish

front borders ; dorsal macrochete of the anal segment short.

Length 6 millim.

Head white; front narrower than the eyes; frontal band black, broader than the white lateral portions ;

frontal bristles descending as far as the end of the second antennal joint; eyes descending to near the

vibrisse ; beard white. Antenne black; second joint bristly; third joint four times as long as the

second ; arista thickened in its proximal third. Proboscis and palpi black. Thorax and scutellum

shining black ; thoracic dorsum before the transverse suture whitish-grey, with four black stripes ; pleure

with irregular whitish reflections. Abdomen conical, shining black, the second and following segments

with whitish front borders, which in the middle are interrupted by a black dorsal stripe, and with discal

and marginal macrochete ; the dorsal macrocheete on the anal segment are much shorter than the others.

Legs black; posterior tibie with rather long bristles ; foot-claws and pulvilli elongate, the pulvilli greyish.

Tegule yellowish-grey. Wings nearly hyaline ; small cross-vein on the middle of the discal cell; apical

cross-vein nearly straight ; posterior cross-vein slightly curved.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

A single male specimen.

16. Telothyria recondita, sp. n., 3.

Black ; thorax anteriorly greyish, with four black stripes ; abdomen with whitish front borders to the segments ;

dorsal macrochete of the anal segment as long as the others.

Length 4 millim.

Closely resembling T. dissepia, from which it differs in the whitish tomentum and the black stripes on the

thorax being extended to a little behind the transverse suture; the macrochets on the upper portion of

TELOTHYRIA. 177

the anal segment as long and stout as those on the other segments; the wings more purely hyaline; and

the posterior cross-vein more oblique and distinctly curved.

Hab. Mexico, Acapulco in Guerrero (H. H. Smith).

A single male specimen.

17. Telothyria comata, sp. n.,¢.

Black, pilose ; thorax anteriorly greyish, with black stripes ; abdominal segments with whitish front borders ;

posterior cross-vein nearly straight.

Length 5:25 millim.

Front slightly prominent, narrower than the eyes, almost wholly occupied by the black frontal band, the

lateral portions white; frontal bristles numerous, descending as far as the end of the second antennal

joint; face and cheeks black, with whitish reflections, the face somewhat inclined; eyes descending to

the vibrisse ; beard white. Antennz black, much shorter than the face; second joint with some rather

long bristly hairs; third joint three times as long as the second ; arista thickened in less than its proximal

half. Proboscis and palpi blackish-brown. Thorax and scutellum black; thoracic dorsum anteriorly

greyish-white, with the commencement of four black stripes. Abdomen conical, black, with not very

distinct, narrow, whitish front borders to the second and following segments, and with many long discal

and marginal macrochete. Legs black; middle and hind tibiee with some long bristles ; foot-claws and

pulvilli elongate, the pulvilli yellowish, somewhat obscure. Tegule whitish. Wings greyish-hyaline ;

small cross-vein on the middle of the discal cell ; apical and posterior cross-veins straight or nearly so, the

posterior slightly incurved near its insertion in the fifth vein and united with the fourth vein a little

beyond the middle between the small cross-vein and the curvature of the fourth vein.

_ Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single male specimen.

18. Telothyria curva, sp. n., o.

Cinereous ; frontal band, four thoracic stripes, hind borders of the abdominal segments, antenne, and legs

black ; palpi rufous; posterior cross-vein curved.

Length 5 millim.

Head white; front nearly as broad as the eyes; frontal band broad ; frontal bristles descending as far as the

end of the second antennal joint ; cheeks broad; eyes descending as far as the tip of the antenne. Third

joint of the antenne three times as long as the second ; arista thickened in its proximal half. Proboscis

black; palpi pale rufous. Thorax and scutellum cinereous; the black thoracic stripes not sharply

delineated ; base of the scutellum blackish. Abdomen conical; first segment black ; the following seg-

ments cinereous, with broad, shining black hind borders ; the segments have long marginal and shorter

discal macrochete. Middle tibie with some long bristles; hind tibie outwardly with several long

bristles; foot-claws and pulvilli a little elongate, the pulvilli yellowish. Tegule whitish. Wings hyaline,

with scarcely any brownish-grey tint ; small cross-vein on the middle of the discal cell; apical cross-vein

straight ; posterior cross-vein distinctly curved inwards, inserted in the middle between the small cross-

vein and the curvature of the fourth vein.

Hab. Mexico, Savana grande in Guerrero 3000 feet (H. H. Smith).

A single male specimen.

19. Telothyria lugens, sp. n.,¢ ¢.

Black; head and front borders of the abdominal segments white; thorax whitish-grey, without distinct

stripes ; palpi rufous.

Length 5 millim.

BIOL. CENTR.-AMER., Dipt., Vol. II., August 1890. Qa

178 - DIPTERA.

Head of the male white, somewhat silvery, of the female yellowish-white; front behind a little narrower, in

the female broader, than the eyes; frontal band black, nearly as broad as the lateral portions ; frontal

bristles descending as far as the end of the second antennal joint; vibrisse inserted at a little distance

above the oral margin; cheeks with some rufous reflection. Antenne black; second joint bristly ; third

joint four or five times as long as the second; arista thickened to one third of its length. Proboscis

black; palpi dark rufous. Thorax and scutellum black, covered with a bluish-grey, laterally with a

white, tomentum ; the usual stripes almost inconspicuous. Abdomen conical; the second and following

segments have white front borders, which on the dorsal portion are narrow, but laterally broader ; in the

male the second segment has some rufous tint at the sides; discal and marginal macrochete are present.

Legs black ; hind tibise outwardly with a row of bristles; foot-claws and pulvilli in both sexes short.

Tegule whitish. Wings greyish-hyaline; small cross-vein a little before the middle of the discal cell ;

curvature of the fourth vein with a blunt angle; apical and posterior cross-veins oblique, the apical

nearly straight, the posterior slightly curved.

Hab. Mexico, Cuernavaca in Morelos, Medellin in Vera Cruz (H. H. Smith).

A male and two female specimens.

20. Telothyria costalis, sp. n., 9.

Black; head and front borders of the abdominal segments whitish ; thorax grey, anteriorly with four black

stripes; palpi rufous; wings infuscated along the costa.

Length 5 millim.

Front broader than the eyes; frontal band black, as broad as the lateral portions, not fully reaching the

vertex; frontal bristles descending as far as the end of the second antennal joint; vibrisse at a short

distance above the oral margin ; occiput grey. Antenne black; third joint three or four times as long

as the second; arista microscopically pubescent, thickened to the proximal half. Palpi slightly thickened

towards the tip. Thorax and scutellum whitish-grey, anteriorly with four black stripes, the intermediate

of which are linear; behind the transverse suture the stripes disappear in a more general black colour,

which, however, is not extended to the hind margin. Abdomen oblong-ovate, shining black, with white

reflections on the front borders of the second and third segments, and also, but less distinctly, on that of

the anal segment; discal and marginal macrochete are present, but the discal ones are much shorter than

the others. Legs black; middle and hind tibis with several bristles, some of them long and robust.

Tegule whitish. Wings greyish-hyaline, yellowish-brown along the costa, which bears very short bristles

and a distinct spine; small cross-vein distinctly before the middle of the discal cell; curvature of the

fourth vein with a blunt angle; apical and posterior cross-veins straight.

Hab. Mexico, Omilteme in Guerrero 8000 feet, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen from each locality.

21. Telothyria rava, sp. n., °.

Shining black; head yellowish-white ; thoracic stripes indistinct ; front borders of the abdominal segments

greyish ; discal and marginal macrocheetz short.

Length 6—6°5 millim.

Front as broad as the eyes ; frontal band black, broader than the lateral portions ; frontal bristles descending

as far as the end of the second antennal joint. Antenne black; second joint bristly; third joint three

times as long as the second ; arista thickened in its proximal half. Proboscis black, its terminal lips with

yellow hairs; palpi rufous, but sometimes very obscure. Thorax and scutellum shining black; thoracic

dorsum anteriorly somewhat greyish, with indistinct black stripes. Abdomen ovate, shining black ;

second and following segments with more or less distinct greyish front borders and vestiges of a black

dorsal stripe; discal and marginal macrocheete present, but short. Legs black; middle tibie with some

long bristles; hind tibie: outwardly with a row of short bristles and a longer bristle below the middle ;

foot-claws and pulvilli short. Tegule brownish. Wings greyish-hyaline ; small cross-vein a little before

the middle of the discal cell; apical cross-vein nearly straight ; posterior cross-vein more or less curved.

TELOTHYRIA. 179

Hab. Mxxico, Venta de Zopilote 2800 feet, Amula 6000 feet, Xucumanatlan 7000

feet, all in Guerrero (H. H. Smith).

Four specimens, apparently all females, owing to the short foot-claws and pulvilli.

22. Telothyria striolata, sp. n., 3 ¢.

Cinereous ; frontal band, four thoracic stripes, hind borders of the abdominal segments, antenne, palpi, and

legs black.

Length 5-5-8 millim.

Head pale ochraceous ; front in the male narrower, in the female broader, than the eyes; frontal band narrower

than the lateral portions; frontal bristles descending as far as the end of the second antennal joint ;

vibrisse inserted at a little distance above the oral margin; beard white. Antenne black; second joint

with short bristles; third joint four times as long as the second ; arista thickened nearly to the middle.

Proboscis and palpi black. Thorax yellowish-cinereous, the stripes somewhat prolonged behind the

transverse suture; scutellum cinereous, with black reflections. Abdomen conical; first segment black,

the following segments cinereous, but with black hind borders; discal and marginal macrochete present.

Hind tibise with several bristles of unequal length. Tegule greyish. Wings in the male with a brownish

tint, which is most intense on the costa, in the female more hyaline; small cross-vein before the middle

of the discal cell; curvature of the fourth vein somewhat rounded; apical cell narrowly opened ; apical

cross-vein nearly straight ; posterior cross-vein curved.

flab. Mexico, Amula 6000 feet, and Xucumanatlan 7000 feet, both in Guerrero,

Teapa in Tabasco (H. H. Smith).

Two males and one female.

23. Telothyria fasciata, sp. n.,3 2.

Head and thorax yellowish-cinereous ; abdomen black, with white front borders to the segments, in the male

laterally yellowish ; frontal band, antenne, four thoracic stripes, and legs black ; palpi rufous.

Length 5 millim. ,

Front narrower than the eyes, in the male narrowed behind ; frontal band narrower than the lateral portions ;

frontal bristles descending as far as the end of the second antennal joint; vibrisse in the male at some

distance above, in the female only a little above, the oral margin; cheeks rather broad; beard white.

Antenne nearly as long as the face; second joint with short bristles ; third joint four times as long as

the second; arista thickened to nearly half its length. Proboscis black, with the terminal lips rufous;

palpi thin, pale rufous. Thorax yellowish-cinereous, anteriorly with four distinct black stripes, which

behind the transverse suture disappear in a more general black coloration ; pleure grey ; scutellum black,

with a grey or cinereous hind margin. Abdomen conical—in the male laterally yellowish and slightly

transparent, the first segment and broad hind borders to the following segments black; in the female

broader and black, with whitish front borders to the second and following segments ; in both sexes discal

and marginal macrochete are present. Legs bristly ; middle tibia with some long bristles; hind tibie

outwardly with several bristles of unequal length; foot-claws and pulvilli elongate in the male, the

pulvilli yellowish. Tegule yellowish (¢) or whitish (2). Wings grey, in the male brownish along the

costa; small cross-vein a little before the middle of the discal cell; apical cross-vein nearly straight ;

posterior cross-vein curved.

| Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A male and a female specimen.

- This species is closely allied to, and perhaps not really distinct from, 7. striolata,

from which it chiefly differs in the rufous palpi, these organs being black in T. striolata.

2a2

180 | DIPTERA.

24. Telothyria ochrifrons, sp. n., 2.

Head and thorax pale ochraceous; frontal band, four thoracic stripes, antenne, and legs black; abdomen

cinereous, with black reflecting spots; palpi rufous.

Length 5°5 millim.

Front as broad as the eyes, with nearly parallel sides; frontal band narrower than the ochraceous lateral

portions; frontal bristles descending to beneath the second antennal joint; eyes descending to the

vibrisse, Second joint of the antenne bristly; third joint four times as long as the second; arista

thickened in its proximal half. Proboscis black; palpi rufous, cylindrical, slightly curved upwards.

Thorax and scutellum cinereous; thoracic dorsum anteriorly pale ochraceous; the four black stripes

linear, the outer stripes interrupted at the transverse suture (seen from the front, the thorax appears

blackish, with two whitish stripes). Abdomen ovate; first segment black; the following segments

cinereous, with irregular black reflecting spots, mostly at the hind margins; discal and marginal -

macrocheetee present, but short. Middle tibie with some long bristles; hind tibie outwardly with a

row of short bristles and a longer one below the middle. Tegule white. Wings greyish-hyaline; small

cross-vein before the middle of the discal cell; apical cross-vein nearly straight ; posterior cross-vein more

or less curved.

Hab. Mexico, Venta de Zopilote 2800 feet, Amula 6000 feet, both in Guerrero

(H. H. Smith).

Three female specimens.

25. Telothyria murina, sp. n.,¢.

Blackish, with some grey tomentum; thorax anteriorly with black stripes; head yellowish; palpi rufous.

Length 6 millim.

Front narrowed behind and there a little narrower than the eyes ; frontal band as broad as the lateral portions,

which are yellowish-cinereous, with white reflections; frontal bristles descending as far as the end of the

second antennal joint; face and cheeks yellowish-white ; eyes descending to the vibrisse. Antenne

black; second joint with bristly hairs; third joint nearly four times as long as the second; arista

thickened in its proximal half. Proboscis black; palpi rufous. Thorax and scutellum black, the thorax

anteriorly with grey tomentum and four black lines. Abdomen elongate-oval, convex, black, with whitish

front borders to the second and following segments and with short discal and marginal macrochete.

Legs black ; middle tibize with some long bristles ; hind tibis outwardly with a row of short bristles and

a longer one below the middle; foot-claws and pulvilli short. Tegule and wings greyish-hyaline; small

cross-vein before the middle of the discal cell; curvature of the fourth vein with a blunt angle; apical

cross-vein oblique, parallel with the outer portion of the hind margin of the wing; posterior cross-vein

curved.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Sinith).

A single female specimen.

26. Telothyria assimulata, sp. n.,3 ¢.

Black; thorax anteriorly whitish, with black stripes; abdominal segments with narrow white front borders ;

palpi rufous.

Length 4°5 millim.

Head whitish, broader than the thorax; front broader than the eyes; frontal band black, as broad as the

lateral portions ; frontal bristles descending as far as the end of the second antennal joint. Antenne

black ; second joint bristly ; third joint three times as long as the second; arista thickened in its proximal

half. Proboscis black ; palpi rufous, cylindrical. Thorax and scutellum black; the shoulders and the

anterior part of the thorax whitish, with four black stripes; pleuree with a whitish band extending from

the shoulders to the middle coxe. Abdomen ovate, shining black; the second and following segments

TELOTHYRIA. 181

with narrow white front borders, which are not very distinct and sometimes only conspicuous at the sides ;

discal and marginal macrochete are present. Legs black; middle tibize with some long bristles; hind

tibize with several bristles of unequal length; foot-claws and pulvilli short in both sexes. Teguls white.

Wings broad, with some brownish-grey tint, which is more intense on the apical portion of the costa

between the first and second veins; small cross-vein before the middle of the discal cell; apical cross-

vein straight ; posterior cross-vein slightly curved.

Hab. Mexico, Chilpancingo 4600 feet, Amula 6000 feet, Omilteme 8000 feet, and

Sierra de las Aguas Escondidas 9500 feet, all in Guerrero (H. Hf. Smith).

Three male and several female specimens.

27. Telothyria remota, sp. n.,°.

Cinereous : frontal band, four thoracic stripes (the inner ones distant from each other), hind borders of the

abdominal segments, antenne, and legs black ; palpi yellowish.

Length 4 millim.

Head yellowish-white; front slightly narrowed behind and there a little narrower than the eyes ; frontal band

as broad as the lateral portions; frontal bristles descending as far as the end of the second antennal

joint ; vibrissee surmounted by several shorter bristles ; beard white. Second joint of the antenne bristly ;

third joint three times as long as the second ; arista thickened in its proximal third. Proboscis black ;

palpi yellowish, slender, scarcely thickened towards the tips. Thorax and scutellum cinereous ; thoracic

dorsum with four black stripes—the median ones linear, more distant from each other than from the outer

stripes, which are much broader; behind the transverse suture the stripes become diffuse in a more

general black coloration ; the base of the scutellum is black. Abdomen elliptical; first segment black ;

second and following segments cinereous, with broad black hind borders, and with discal and marginal

macrochete. Middle tibie with some long bristles; hind tibiee outwardly with several bristles of

unequal length ; foot-claws and pulvilli short. Tegule white. Wings greyish-hyaline; small cross-vein

before the middle of the discal cell; curvature of the fourth vein with a blunt, somewhat rounded angle ;

apical cross-vein slightly concave ; posterior cross-vein distinctly curved inwards.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

Two female specimens.

28. Telothyria sublineata, sp. n., 2.

Cinereous ; frontal band, four thoracic stripes, hind borders of the abdominal segments, antenne, and legs

black; palpi rufous ; abdomen conical, compressed beneath.

Length 6°5 millim.

Head whitish ; front broader than the eyes; frontal band narrower than the lateral portions and attenuated

towards the vertex; frontal bristles stout, descending as far as the end of the second antennal joint ;

cheeks rather broad ; eyes descending to near the vibrisse. Second joint of the antenne with some rough

bristles ; third joint four times as long as the second ; arista thickened not quite to the middle. Thorax

and scutellum cinereous ; thoracic dorsum with four equidistant stripes—the median ones linear, the outer

stripes a little broader,—which behind the transverse suture become diffuse in a more general black

coloration; the base of the scutellum is black. Abdomen conical, on the ventral side compressed and

somewhat carinated; first segment black; the following segments cinereous, with broad black hind

borders, and with discal and marginal macrochetew, the discal macrochxte shorter than the others.

Middle tibie with some long bristles; hind tibia outwardly with several. bristles of unequal length.

Foot-claws and pulvilli short. Tegule white. Wings with some greyish tint; small cross-vein before

the middle of the discal cell ; apical cross-vein slightly concave ; posterior cross-vein nearly straight.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen. |

182 DIPTERA.

29. Telothyria ovata, sp.n., 2.

Grey; frontal band, four thoracic stripes, hind borders of the abdominal segments, antennw, and legs black ;

palpi rufous ; abdomen ovate.

Length 5°5 millim.

Front pale ochraceous, as broad as the eyes ; frontal band narrower than the lateral portions ; frontal bristles

descending as far as the end of the second antennal joint ; eyes descending to the vibrisse. Second

antennal joint with some bristly hairs ; third joint four times as long as the second ; arista thickened in

its proximal half. Proboscis black; palpi rufous, slightly thickened towards the tips. Thorax and

scutellum grey; thoracic dorsum with four black stripes—the intermediate ones linear, the outer stripes

scarcely broader and interrupted at the transverse suture. Abdomen ovate; first segment black ; the

following segments grey, with the hind borders shining black; discal and marginal macrochete short,

only those on the hind margin of the third segment somewhat longer. Middle tibiee with some long

bristles ; hind tibiee with several short and some longer bristles. Tegule white. Wings greyish-hyaline ;

small cross-vein before the middle of the discal cell; apical cross-vein straight; posterior cross-vein

slightly curved.

Hab. Mexico, Tierra Colorada in Guerrero 2000 feet (H. H. Smith).

A single female specimen.

30. Telothyria cupreiventris, sp.n., @. (Tab. IV. figg. 14; 14a, head in

\-7 profile. )

Thorax bluish-grey ; pleure with yellowish pile; abdomen shining brown, somewhat metallic; palpi and base

of the antenne rufous ; legs black.

Length 7°5 millim.

Head ochraceous ; face and cheeks narrow ; front narrower than the eyes, obscure; frontal band black, with a

grey reflection. Antenne rufous ; third joint (except at the base) black ; arista thickened in its proximal

half. Proboscis black, with the terminal lips somewhat rufous; palpi pale rufous. Thorax bluish-grey,

with white reflections and obsolete black lines; pleuree whitish, densely beset with a yellowish pile;

scutellum brown, with a grey tomentum. Abdomen shining brown, slightly metallic, the first two ~

segments laterally rufous and somewhat transparent, the metallic coloration most conspicuous on the

third and anal segments, where it; becomes more or less violaceous; macrochete rather strong, only at

the hind margins of the third and anal segments, a lateral one, however, also on the first and second

segments. Legs black, with bristles of moderate size ; foot-claws and pulvilli short. Tegule yellowish-

grey. Wings greyish-hyaline, yellowish at the base and along the costa; small cross-vein a little beyond

the middle of the discal vein; apical and posterior cross-veins curved, the latter nearly in the middle

between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico, Fortin in Vera Cruz, Teapa in Tabasco (H. H. Smith).

Five female specimens.

31. Telothyria placida, sp. n., 9.

Cinereous; thorax with four black stripes; abdomen blackish-brown, with grey reflecting spots, laterally

rufous ; palpi and base of the antenne rufous ; legs black.

Length 7 millim.

Head ochraceous; front narrower than the eyes, with parallel sides; frontal band black. Antenne rufous;

third joint (except at the base) blackish ; arista thickened to near the middle. Proboscis shining black,

the terminal lips and the almost filiform palpi rufous. Thorax yellowish-grey ; the black stripes distinct

and prolonged behind the transverse suture, the intermediate ones linear and slightly convergent in front ;

scutellum testaceous, with grey tomentum. Abdomen blackish brown; the second and following seg-

ments with narrow grey front borders, grey reflecting spots, and a not always conspicuous, interrupted,

TELOTHYRIA. 183

black dorsal stripe; the sides of the first two segments and the anus rufous; several macrochxte at the

end of the anal segment, also a lateral one (but no dorsal ones) on each of the other segments, and a pair

on the hind margin of the third segment, these latter being very short and inconspicuous. Tibie with

short bristles, which on the hind pair outwardly are almost fringe-like ; foot-claws and pulvilli short.

Tegule yellowish-grey, with a whitish margin. Wings greyish-hyaline ; apical cell rather widely opened

at a little distance from the wing’s tip; small cross-vein on the middle of the discal cell; apical and

posterior cross-veins slightly curved, the latter a little beyond the middle between the small cross-vein

and the curvature of the fourth vein.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

32. Telothyria illucens, sp.n., 3 9.

Cinereous; thorax with black stripes ; abdomen yellow, with a black dorsal band and more or less black hind

borders to the segments ; palpi and base of the antenne rufous ; legs black.

Length 5-6°5 millim.

Front narrower than the eyes; frontal band black ; frontal bristles short, not descending beneath the root of

_ the antenne; cheeks narrow ; vibrisse inserted at a little distance above the oral margin; occiput grey.

Antenne much shorter than the face; the two basal joints and the base of the third joint rufous ; third

joint (except at the base) blackish, twice as long as the second ; arista microscopically pubescent, thickened

at the base. Proboscis shining black, rufous towards the tip ; palpi small, filiform. Thorax light-grey (d )

or cinereous (@ ), with four black stripes (which are less regular than in T. placida, and often scarcely

visible) ; scutellum testaceous, sometimes appearing blackish with the hind margin cinereous or rufous.

Abdomen conical, yellow, somewhat transparent ; hind borders of the segments blackish-brown—on the

first and second segments this border is rather narrow, on the third much broader, on the anal segment it

occupies nearly the whole length,—this dark coloration being extended in the middle to a broad dorsal

band; the third and the anal segments have whitish reflections, especially towards the front margins ;

macrochsxte rudimentary and scarcely recognizable on the hind margins of the last two segments. Legs

slender, with weak bristles; foot-claws and pulvilli short in both sexes. Tegule yellowish. Wings

not longer than the abdomen, yellowish- or greyish-hyaline ; apical cell narrowly opened; small cross-

vein on the middle or a little beyond the middle of the discal cell; apical and posterior cross-veins very

slightly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

Three male and two female specimens.

33. Telothyria argentifrons, sp. n., ?.

Light grey; front silvery-white, without frontal band; the frontal bristles close to the orbits of the eyes ;

-antennee and legs black ; palpi rufous.

Length 4°5 millim.

Front silvery-white, forming a subquadrate surface, with a black ocellar point, but without any trace of

the usual frontal band; the frontal bristles inserted quite close to the orbits of the eyes, in a row which

is prolonged in a curved line as far as the end of the second antennal joint. Face and cheeks yellowish-

white ; eyes descending to beneath the vibrisse. Third antennal joint three times as long as the second;

arista thickened to half its length and then suddenly becoming fine and hair-like. Proboscis black, with

the terminal lips rufous; palpi rufous, small. Thorax and scutellum whitish-grey, with some bluish

tint ; no thoracic stripes. Abdomen ovate, grey, with irregular blackish reflections, and with marginal

macrochete. Middle tibie with some long bristles; hind tibiee outwardly with a row of shorter bristles ;

foot-claws and pulvilli short. Tegule white. Wings greyish-hyaline ; small cross-vein before the middle

' of the discal cell; apical cross-vein slightly concave; posterior cross-vein straight.

Hab. Mexico, Amula 6000 feet, Omilteme 8000 feet, both in Guerrero (H. H. Smith).

184 DIPTERA.

Three female specimens.

Owing to the absence of the frontal band and the peculiar position of the frontal

bristles, this species will probably have eventually to be separated from Telothyria,

these differences being almost of generic importance.

34. Telothyria occulta, sp. n., 2.

Head pale ochraceous ; thorax grey, with four black stripes; abdomen cinereous, with black hind borders to

the segments ; frontal band, antenn, palpi, and legs black.

Length 6 millim.

Front broader than the eyes; frontal band narrower than the ochraceous lateral portions; frontal bristles

descending to beneath the second antennal joint; cheeks broad; eyes descending to the vibrisse ; beard

whitish. Antenne distinctly shorter than the face; second joint bristly ; third joint two and a half times

as long as the second; arista thickened in its proximal half. Proboscis black, its terminal lips with yellow

hairs; palpi black, thickened towards the tip. Thorax light grey; thoracic dorsum with four distinct

black stripes, which behind the transverse suture are somewhat united, the outer stripes broader than the

others ; scutellum black, with a greyish hind border. First abdominal segment black; the following

segments cinereous, with broad black hind borders, and with marginal macrochete; beneath the anus is

a black spine, which is turned towards the venter. Middle tibie with a few, the hind tibie with several,

long bristles ; foot-claws and pulvilli short. Tegule white. Wings greyish-hyaline ; small cross-vein

before the middle of the discal cell; apical cross-vein straight; posterior cross-vein distinctly curved

inwards.

Hab. Mxxico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen.

35. Telothyria carinata, sp. n., 2.

Black; head white; thorax whitish-grey, with black stripes; abdomen carinated on the underside; front

borders of the segments whitish ; palpi rufous.

Length 5°5 millim.

Front broader than the eyes; frontal band black, narrower than the lateral portions ; frontal bristles descending

as far as the end of the second antennal joint; face and cheeks rather broad. Antenne black ; second

joint bristly ; third joint four or five times as long as the second ; arista thickened at the base. Proboscis

black ; palpi pale rufous, thickened towards the tip. Thorax and scutellum covered with a whitish-grey

tomentum ; thoracic dorsum with four black stripes—the intermediate ones linear, the outer ones less

conspicuous. Abdomen elongate-oval, the ventral side compressed and carinated ; the first segment and

the hind borders of the following segments shining black, the front borders of the second and following

segments whitish, with some traces of a black dorsal stripe ; long macrochete are on the hind margins of

all the segments. Legs black, bristly; the hind tibie with several long bristles. Tegule whitish. Wings

greyish-hyaline ; small cross-vein before the middle of the discal cell ; apical cross-vein straight, only a

little concave at its end; posterior cross-vein more distinctly concave.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

Two female specimens.

36. Telothyria vicina, sp. n., ¢.

Yellowish-cinereous ; thorax with four black stripes ; hind borders of the abdominal segments, antenne, and

legs black ; anus and palpi rufous.

Length 6 millim.

Sides of the front and of the face ochraceous ; median and inferior parts of the face and posterior orbits whitish-

TELOTHYRIA. 185

grey; occiput cinereous; front as broad as the eyes; frontal band black, with a grey reflection, narrower

than the lateral portions; frontal bristles descending as far as the end of the second antennal joint ;

vibrissee inserted at a little distance above the oral margin, and surmounted by some other bristles.

Antenne a little shorter than the face ; second joint bristly ; third joint four times as long as the second ;

arista thickened at the base. Proboscis black; palpi rufous, cylindrical. Thorax light cinereous, with

some ochraceous tint, especially on the shoulders; the black stripes distinct and prolonged behind the

transverse suture—the intermediate ones linear and more distant from each other than from the outward

stripes ; scutellum blackish at the base. Abdomen elongate-oval, convex, carinated on the ventral side ;

first segment black; the following segments yellowish-cinereous, with the hind borders broadly black ;

anal segment cinereous, the anus itself rufous; macrochet rather long, on the hind margins of all the

segments. Legs bristly; middle tibie with some long bristles ; hind tibia outwardly with several bristles

of unequal length. Tegule yellowish-white. Wings greyish-hyaline ; small cross-vein on the middle of

the discal cell; curvature of the fourth vein with a blunt angle; apical cross-vein nearly straight ;

posterior cross-vein slightly curved, a little beyond the middle between the small cross-vein and the

curvature of the fourth vein.

Hab. Mexico, Venta de Zopilote 2000 feet, Xucumanatlan 7000 feet, both in Guer-

rero, Teapa in Tabasco (H. H. Smith).

Three female specimens.

This species much resembles Masicera abdominalis (antéa, p. 106), from which it

differs in having red palpi, the apical cell ending nearer to the wing’s tip, the anal

segment not wholly rufous, and the bristles above the vibrisse not ascending so high

on the face.

37. Telothyria refuga, sp. n., 2.

Thorax grey, with four black stripes; abdomen shining black, with white front borders to the segments ;

frontal band, antenns, and legs black; palpi yellowish; wings with a costal spine.

Length 5°5 millim.

Head white; front nearly as broad as the eyes; frontal band as broad as the lateral portions ; frontal bristles

descending as far as the end of the second antennal joint; eyes descending to the vibrisse. Second

antennal joint bristly ; third joint three or four times as long as the second; arista thickened at the base.

Proboscis black; palpi yellowish, filiform, scarcely thicker towards the tip. Thoracic stripes distinct

before the transverse suture, but disappearing behind it in a more general black coloration; scutellum

black. Abdomen elongate-oval, shining black ; second and following segments with narrow white front

borders, and with macrochete on the hind margins. Middle tibie outwardly with a long bristle; hind

tibie outwardly with a row of bristles of unequal length. Tegule white. Wings greyish-hyaline, with

a short costal spine just before the end of the auxiliary vein; small cross-vein nearly in the middle

of the discal cell; apical cell slightly concave; posterior cross-vein straight, in the middle between the

small cross-vein and the curvature of the fourth vein.

Hab. Mexico, Acaguizotla in Guerrero 3500 feet (H. H. Smith).

Two female specimens.

38. Telothyria pacata, sp. n., °.

Thorax whitish-grey, with four black stripes; abdomen shining black, with whitish front borders to the seg-

ments; frontal band, antenne, and legs black ; palpi yellowish.

Length 5-5-6 millim.

Head white; front slightly prominent, as broad as the eyes ; frontal band as broad as the lateral portions ;

frontal bristles descending as far as the end of the second antennal joint; eyes descending to the vibrisse.

Antenne nearly as long as the face; second’ joint bristly ; third joint four times as long as the second ;

BIOL. CENTR.-AMER., Dipt., Vol. II., August 1890. 26

186 DIPTERA.

arista thickened in its proximal half. Proboscis black; palpi yellowish, filiform. Thorax and scutellum

whitish-grey ; thoracic dorsum with four black stripes, the outer stripes interrupted at the transverse

suture; base of the scutellum black. Abdomen conical, shining black; second and following segments

with narrow white front borders; all the segments with long marginal macrochete. Posterior tibix

with rather long bristles. Tegule white. Wings greyish, without a costal spine ; small cross-vein before

the middle of the discal cell; the terminal portions of the third vein and of the apical cross-vein curved

towards each other ; posterior cross-vein almost straight, nearer to the curvature of the fourth vein than

to the small cross-vein.

Hab. Mexico, Xucumanatlan 7000 feet, Omilteme 8000 feet, both in Guerrero

(H. H. Smith).

Two female specimens.

ANISIA, gen. nov.*

Front not prominent; frontal bristles descending on each side in a single row more or less beneath the root of

the antenne ; face perpendicular; facial ridges without bristles; vibrisse inserted just at the oral

margin; cheeks narrow. Eyes bare (in A. pullata, A. obscurifrons, and A. ophthalmica microscopically

pubescent). Antenne shorter than the face; basal joints short ; third joint much longer than the second ;

arista not visibly jointed. Proboscis exserted ; palpi filiform or slightly thicker towards the tip. Abdomen

conical or ovate; second and third segments with discal and marginal, or only with marginal, macro-

chete. Legs moderately long and bristly ; front tarsi not longer than the tibia. Wings longer than the

abdomen, usually without a costal spine ; apical cell opened at or close to the wing’s tip ; curvature of the

fourth vein angular, rarely somewhat rounded.

The large number of species I include in this genus have the apical cell opened at

or near the wing’s tip, but they cannot be included in any of the preceding genera

possessing this character. Amnisia is closely related to Telothyria, and differs from that

genus only by the vibrisse being inserted just at the oral margin. From Lasiona and

Macquartia it is distinguished by the bare eyes ; from Myobia, Polygaster, Labidigaster,

and Hypostena by the less elongate shape of the abdomen and legs; from Degeeria and

Didyma by the absence of bristles on the facial ridges.

In the genus Anisia I include the following species :—

1. Second and third abdominal segments with discal and marginal

macrochete .. . . . . se ew DQ

Second and third abdominal segments with marginal macro-

chete only . .... re.

2. Legs, or at least the femora, rufous Lee . . 8.

Legs black (in one species the base of the hind femora rufous). 7.

3. Antenne black. . 2 2 1. 1 1 1. 1 ww ww... inflewa, v. d. Wulp.

Antenne rufous. . . . . 4. ;

4, Frontal bristles scarcely descending beneath the root of the

antenne ... . . . rubripes, v. d. Wulp.

Frontal bristles descending to the end of the second antennal

joint . oe ee De

5. Abdomen cinereous. . . . . .. 1... . + cineraria, v. d. Wulp.

* dyvoos (unequal).

ANISIA.

Abdomen rufous, with a black dorsal band and whitish reflec-

tions. coe ee

6. Frontal band linear. . . - oe

Frontal band broader than the lateral portions. . . ,

7. Small cross-vein distinctly before the middle of the discal cell.

Small cross-vein on or near the middle of the discal cell

8. Front cox and base of the hind femora rufous

24.

. Legs rufous; (third vein bristly)

Legs without any rufous coloration

. Posterior cross-vein perpendicular .

Posterior cross-vein oblique .

. Wings brown at the base and along the costa .

Wings hyaline, or somewhat obscure over the whole surface

. Palpirufous . . . . .

Palpi black

. Scutellum grey (thorax anteriorly with three black lines)

Scutellum black. . . .

. Apical and posterior cross-veins concave. . . . -

Apical and posterior cross-veins straight .

. Posterior cross-vein in or before the middle between the small

cross-vein and the curvature of the fourth vein . .

Posterior cross-vein beyond the middle between the small cross-

vein and the curvature of the fourth vem. . .

. Ochraceous, with black markings ; larger species (6 raillim os

Unicolorous black ; smaller species (4 millim.)

. Palpi black

Palpi rufous or yellowish. . . . . soe ee

. Thorax whitish-grey, with obsolete stripes a

Thorax black, anteriorly greyish with distinct black stripes .

. Abdomen shining black, without whitish markings

_ Abdomen black, with whitish front borders to the segments

Posterior cross-vein distinctly curved .

Posterior cross-vein nearly straight - :

. The whitish front borders of the abdominal segments broad ;

thoracic stripes prolonged behind the transverse suture .

The whitish front borders of the abdominal segments narrow ;

thoracic stripes only conspicuous before the transverse suture.

Legs black . .. . oe

. Abdomen shining black, with white reflections . Loe ee

Abdomen cinereous.

. Abdomen partly rufous we ee ee

Abdomen without any rufous coloration (in A. nigrocincta

ochraceous)

Anal segment rufous . . ..... 4.4 6

187

pallidipalpis, v. d. Wulp.

fulvipennis, v. d. Wulp.

14.

ruficoxa, v. d. Wulp.

pulicaria, v. d. Wulp.

10.

neglecta, v. d. Wulp.

ll.

stolida, v. d. Wulp.

12.

trifilata, v. d. Wulp.

13.

egrota, v.d. Wulp.

intrusa, v. d. Wulp.

15.

16.

signata, v. d. Wulp.

nigella, v. d. Wulp.

17.

18.

candicans, v. d. Wulp.

congerens, v. d. Wulp.

19.

20.

morionella, v. d. Wulp.

pullata, v.d. Wulp.

inepta, v. d. Wulp.

accedens, v. d. Wulp.

23.

peregrina, v. d. Wulp.

fatua, v. d. Wulp.

24.

26.

nigrithorar, v. d. Wulp.

26 2

188

25.

26.

27.

28.

29.

30. . cee ee

_ Wings hyaline or nearly hyaline soe ee soe ee

3l.

32.

33.

34.

35.

36.

37.

38.

39.

DIPTERA.

Anal segment black, with a whitish front border .

Lateral portions of the front blackish .

Lateral portions of the front white . .

Small cross-vein distinctly beyond the middle of the discal cell

Small cross-vein on or before the middle of the discal cell .

Thoracic dorsum without stripes .

Thoracic dorsum with more or less distinct stripes

Thorax bluish-grey .

Thorax black or blackish . . Loe

Abdominal segments only with indications of whitish front

borders . Loe ee

Abdominal segments with sharply limited, narrow, snow-white

front borders .

Wings brownish .

The brownish coloration of the wings more intense on the

apical half. woe ee .

The brownish coloration of the wings more intense at the hase

and along the costa .

Front laterally cinereous .

Front black

Ochraceous species ; the abdominal segments with well- defined

hind borders . .

Blackish species; the abdominal segments with whitish or

cinereous front borders or reflecting spots

Small cross-vein on the middle of the discal cell

Small cross-vein distinctly before the middle of the discal cell.

Third vein with a row of short bristles

Third vein without bristles

Wings with a costal spine.

Wings without a costal spine

Arista pubescent . Loe ee ee

Arista bare 2... ee ee ee ee

Anal segment shining black, without any whitish reflections

Anal segment with whitish or cinereous reflections or whitish

front border

Scutellum black .

Scutellum cinereous

. Palpi rufous

Palpi black

1. Anisia inflexa, sp. n., 2.

Cinereous; antenne, frontal band, four thoracic stripes, and the hind borders of the abdominal segments

black; palpi and femora rufous.

Length 5°5 millim.

25.

obscurifrons, v. d. Wulp.

aberrans, v. d. Wulp.

macroptera, v. d. Wulp.

27.

28.

30.

mucorea, v. d. Wulp.

29.

conspersa, v. d. Wulp.

niveomarginata,v.d. Wulp.

3l.

33.

umbrina, v. d. Wulp.

32.

opaca, v. d. Wulp.

gagatina, v. d. Wulp.

nigrocincta, v. d. Wulp.

34.

remissa, v. d. Wulp.

35.

approximata, v. d. Wulp.

36.

palposa, v. d. Wulp.

37.

ciliata, v. d. Wulp.

38.

ophthalmica, v. d. Wulp.

39.

similis, v. d. Wulp.

40.

misella, v. d. Wulp.

infima, v. d. Wulp.

ANISIA. i89

Head whitish, the oral margin with a yellowish tint ; front as broad as the eyes; frontal band narrower than

the lateral portions; frontal bristles descending as far as the end of the second antennal joint. Third

antennal joint four times as long as the second; arista thickened not quite to the middle. Proboscis

black ; palpi pale rufous, elongate. Thorax and scutellum greyish-cinereous; thoracic dorsum with four

black stripes—the median ones linear, the outer stripes interrupted at the transverse suture. Abdomen

ovate, convex, pointed towards the anus; first segment black; the following segments cinereous, with

broad black hind borders, and with discal and marginal macrochete. Coxe cinereous; femora rufous,

the front pair with a blackish streak on their upper part, the middle and hind pairs with blackish tips ;

tibiz blackish-brown ; tarsi black ; posterior tibiz with some long bristles ; foot-claws and pulvilli short.

Tegule greyish. Wings with a dilute brownish tint, this being more intense towards the costa; small

cross-vein before the middle of the discal cell; curvature of the fourth vein angular; apical cross-vein

slightly concave; posterior cross-vein distinctly undulate.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (A. H. Smith).

A single female specimen.

2. Anisia rubripes, sp. n., 2.

Black ; head white ; thorax anteriorly whitish, with four black stripes; abdomen shining, with white incisions ;

anal segment, antenne, palpi, and legs rufous.

Length 6 millim.

Face and cheeks silvery-white; front broader than the eyes, whitish, with grey reflections; frontal band

black, not prolonged on the vertex; frontal bristles not descending beneath the root of the antenne.

Antenne nearly as long as the face; third joint four or five times as long as the second, the tip brown ;

arista scarcely thickened at the base. Terminal lips of the proboscis rufous; palpi slightly thickened

towards the tip. Thorax black; the light tomentum is white on the shoulders and on the pleura, and

greyish before the transverse suture, where it is interrupted by four black stripes, the intermediate of

which are linear; scutellum blackish, with the hind margin grey. Abdomen ovate, convex, brownish-

black, with white incisions, shining ; anal segment rufous; laterally and on the ventral side this rufous

colour is extended also on the third segment, and there appear white reflections; discal and marginal

macrochete are present. Legs rufous, the tibie brownish, the tarsi black; hind tibise with several

bristles. Tegule yellowish-grey. Wings rather broad, greyish, with some rufous tint; small cross-vein

before the middle of the discal cell; apical cell opened just at the wing’s tip; apical cross-vein curved ;

posterior cross-vein straight, nearly perpendicular.

Hab. Mexico, Atoyac in Vera Cruz (f. H. Smith).

A single female specimen.

3. Anisia cineraria, sp. n., ¢.

Cinereous ; head silvery-white; antenne, palpi, and legs rufous.

Length 6 millim.

Front slightly prominent, broader than the eyes; frontal band narrower than the lateral portions ; frontal

bristles descending as far as the end of the second antennal joint ; beard white. _ Antenne’ as long as the

face; basal joints’ very short; third joint six times as long as the second ; arista black, inserted at the

base of the third joint, and thickened not quite to the middle. Thorax and ‘scutellum cinereous ; thoracic

dorsum with some obsolete dark stripes. Abdomen elliptical, cinereous, with more or less conspicuous

brownish hind borders to the segments, and with distal: and marginal macrochete. Legs rufous, the

tarsi black ; middle tibia with some long bristles ; hind: tibie outwardly with bristles of unequal length ;

foot-claws and pulvilli short. Tegule whitish. Wings hyaline; small eross-vein on the middle of the

discal cell ; curvature of the fourth vein with a blunt t angle ; ; apical cross-vein slightly concave ; posterior

cross-vein distinctly curved.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (Hl. ZH. Smith).

A single female specimen.

190 DIPTERA.

4, Anisia pallidipalpis, sp. n., ¢.

Head white; thorax cinereous, with black stripes; abdomen rufous, with white reflections and a black dorsal —

stripe; antenne and legs rufous ; palpi pale yellow.

Length 5 millim.

Face and cheeks white, the cheeks broad; front ochraceous, much broader than the eyes; frontal band black,

linear; frontal bristles descending as far as the end of the second antennal joint; above the vibrissw

some short bristles. Antenne rufous; second joint with short bristles ; third joint four times as long as

the second and infuscate towards the tip; arista thickened at the base, microscopically pubescent.

Proboscis rufous ; palpi pale yellow, slightly thickened near the tip. Thorax light cinereous, with four

black stripes—the intermediate ones anteriorly convergent and prolonged behind the transverse suture,

the outer stripes less regular; the macrochete arising from black points ; scutellum cinereous. Abdomen

elongate-oval, rufous, with white reflections on the front borders of the segments and a black dorsal band ;

hind borders of the third and anal segments blackish; discal and marginal macrochete present; ventral

surface whitish. Legs rufous, the tarsi black (the hind legs are broken off). Tegule white. Wings

greyish-hyaline ; small cross-vein a little before the middle of the discal cell; apical cross-vein straight ;

posterior cross-vein slightly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

5. Anisia fulvipennis, sp.n., ¢ 9. (Tab. IV. figg. 15; 15a, head in profile.)

Thorax cinereous, with four black stripes ; abdomen rufous, with white incisions and a black dorsal band ;

antenne, palpi, and legs rufous; wings yellowish-brown.

Length 7 millim.

Head white; cheeks rather narrow, with rufous reflections ; front with black reflections, in the male narrower,

in the female broader, than the eyes; frontal band rufous or brownish-black, with a grey reflection ; frontal

bristles descending as far as the end of the second antennal joint ; occiput grey, the posterior orbits of the

eyes silvery-white. Antenne nearly as long as the face; second joint bristly ; third joint five times as

long as the second; arista black, thickened not quite to the proximal half. Proboscis and palpi rufous.

Thorax yellowish-cinereous, the four black stripes prolonged behind the transverse suture ; scutellum

cinereous. Abdomen elongate-oval, rufous, with a black dorsal band and white front borders to the

second and following segments, this white coloration becoming broader laterally and on the ventral side ;

discal and marginal macrochete present. ‘Legs rufous; tibia more obscure; tarsi black; foot-claws and

pulvilli elongate in the male, the pulvilli whitish. Tegule yellow. Wings yellowish-brown, the yellow

tint more intense at the base and along the costa; small cross-vein nearly on the middle of the discal

cell; curvature of the fourth vein rounded ; apical cross-vein straight to near its end, where it is slightly

curved ; posterior cross-vein somewhat concave ( ¢) or straight ( ? ).

Hab. Mexico, Amula 6000 feet, Xucumanatlan 7000 feet, both in Guerrero, Teapa

in Tabasco (H. H. Smith).

One male and four female specimens.

6. Anisia ruficoxa, sp. n., °.

Black ; head silvery-white ; thorax grey, with black stripes; front borders of the abdominal segments whitish ;

base of the antenne, palpi, front coxe, and base of the hind femora rufous.

Length 4°5 millim.

Front a little narrowed behind and there as broad as the eyes; frontal band black, narrower than the lateral

portions. Antenne as long as the face; the basal joints and the base of the third joint rufous; third

joint three times as long as the second ; arista thickened to the proximal half. Palpi cylindrical, pale

rufous ; terminal lips of the proboscis yellowish. Thoracic dorsum with four black stripes, which are

ANISIA. 191

most conspicuous before the transverse suture, the lateral stripes reduced to a pair of spots, one before and

one behind the suture; scutellum grey. Abdomen oblong-ovate, shining black ; front borders of the

_ second and third segments whitish ; on the second segment a black dorsal line; discal and marginal macro-

cheete present. Legs black, the front coxe rufous with a white reflection and with strong bristles; base

of the hind femora also rufous; hind tibie piceous, with some bristles. Tegule and wings greyish-

hyaline; small cross-vein distinctly before the middle of the discal cell; curvature of the fourth vein

somewhat rounded ; apical and posterior cross-veins slightly curved.

Hab. Muxico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

7. Anisia pulicaria, sp. n., 2.

Shining black; head whitish ; tegulz white; posterior cross-vein perpendicular.

Length 2:25 millim. .

Front broader than the eyes ; frontal band black, broader than the lateral portions, which are blackish with a

white reflection ; frontal bristles descending as far as the end of the second antennal joint ; cheeks white.

Antenne, proboscis, and palpi black; the antenne shorter than the face, their third joint four times as

long as the second; arista thickened to the proximal half. Thorax and scutellum shining black, the

anterior part of the thoracic dorsum with scarcely any grey tomentum and with only inconspicuous stripes.

Abdomen ovate, shining black, with short discal and marginal macrochate. Legs black; middle tibie

with two or three bristles; hind tibie outwardly with several bristles of moderate length ; foot-claws and

pulvilli short. Wings hyaline; small cross-vein before the middle of the discal cell; apical and posterior

cross-veins nearly straight, the former oblique, the latter more perpendicular and inserted in or just

beyond the middle between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico, Orizaba (H. H. Smith).

A single female specimen.

A second specimen, from Mexico city (H. H. Smith), has a more distinct grey

tomentum on the thorax, narrow white front borders to the abdominal segments, and a

small costal spine to the wings; it may be only a variety of A. pulicaria.

8. Anisia neglecta, sp.n., ?.

Cinereous ; frontal band, four thoracic stripes, antenne, palpi, and legs black; abdomen black, with narrow

whitish front borders to the segments; wings brownish.

Length 6°5 millim.

Front cinereous, somewhat ochraceous, broader than the eyes; frontal band narrower than the lateral portions ;

frontal bristles descending as far as the end of the second antennal joint ; face and cheeks whitish-grey.

Antenne nearly as long as the face; second joint bristly; third joint four or five times as long as the

second; arista thickened at the base. Proboscis black, with the terminal lips rufous; palpi black,

filiform. Thorax and scutellum yellowish-cinereous ; thoracic dorsum with four distinct black stripes,

the outer stripes interrupted at the transverse suture ; base of the scutellum blackish. Abdomen ovate,

black ; second and following segments with narrow yellowish-white front borders, and with long marginal

and some shorter discal macrochete. Middle tibiz with some long bristles; hind tibie outwardly with

several bristles of unequal length. Tegule yellowish-grey. Wings brownish, more intensely so towards

the costa ; small cross-vein before the middle of the discal cell; apical cross-vein straight to near its end,

where it is slightly curved; posterior cross-vein distinctly curved.

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 7000 feet (H. H. Smith).

A single female specimen.

192 DIPTERA.

9, Anisia stolida, sp.n., 2.

Cinereous ; frontal band, four thoracic stripes, antenne, and legs black; abdomen shining black, with whitish

front borders to the segments ; palpi rufous.

Length 6 millim.

Front yellowish-cinereous, as broad as the eyes; frontal band nearly as broad as the lateral portions; frontal

bristles descending as far as the end of the second antennal joint; face and cheeks whitish ; beard white.

Antenne shorter than the face ; second joint bristly; third joint four times as long as the second ; arista

thickened not quite to the middle. Proboscis black, with large terminal lips. Thorax and scutellum

cinereous ; thoracic dorsum with four black stripes, the outer stripes interrupted at the transverse suture ;

base of the scutellum blackish. Abdomen subconical, convex, shining black; second and following

segments with whitish front borders, and with discal and marginal macrochete. Front tibia outwardly

with a row of short bristles; middle tibiee with some long bristles; hind tibize outwardly with several

bristles of unequal length. Tegule whitish. Wings greyish-hyaline ; small cross-vein distinctly before

the middle of the discal cell ; apical cross-vein slightly concave ; posterior cross-vein a little curved.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

A single female specimen.

10. Anisia trifilata, sp. n., 2.

Thorax cinereous, anteriorly with three black lines; abdomen black, with whitish reflecting spots; antenne,

palpi, and legs black.

Length 5°5 millim.

Front blackish-cinereous, broader than the eyes; frontal band black, but sometimes inconspicuous in a greyish

reflection ; frontal bristles descending as far as the end of the second antennal joint; face and cheeks

yellowish-white. Antenne shorter than the face; third joint three times as long as the second; arista

thickened to the proximal half. Proboscis and palpi black. Thorax and scutellum greyish-cinereous ;

thoracic dorsum anteriorly with three black lines, which are placed close together and disappear behind

the transverse suture in a more general blackish coloration. Abdomen ovate, black, with whitish reflec-

tions, chiefly on the front borders of the segments, and with discal and marginal macrochete of moderate

length. Front tibie outwardly with a row of short bristles; middle tibie with some long bristles ; hind

tibiz with several bristles of unequal length. Tegule whitish. Wings greyish-hyaline; small cross-

vein before the middle of the discal cell ; apical cross-vein concave; posterior cross-vein slightly curved.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single female specimen.

11. Anisia egrota, sp. n., 2.

Blackish ; cheeks, humeral spots, and front margins of the abdominal segments whitish; exterior cross-veins

concave.

Length 4 millim. .

Front as broad as the eyes; frontal band black, broader than the lateral portions, which are blackish with a

white reflection ; frontal bristles descending as far as the end of the second antennal joint; face and

cheeks blackish, with white reflections ; behind the vibrisse several rather long bristly hairs. Antenne

black, shorter than the face; second joint with short bristles; third joint three times as long as the

second ; arista thickened to the proximal half. Proboscis and palpi black. Thorax and scutellum black ;

thoracic dorsum anteriorly with some greyish tomentum and indistinct black stripes ; the shoulders more

whitish ; some irregular grey spots on the pleure. Abdomen subconical, shining black; second and

following segments with white front borders, and with long discal and marginal macrochete. Legs

black ; hind femora with long bristly hairs on the underside ; middle tibie: with some long bristles ; hind

tibie outwardly with several bristles of unequal length. Tegule whitish. Wings grey ; small cross-vein

ANISIA. 193

before the middle of the discal cell; apical cross-vein slightly, the posterior cross-vein more distinctly,

concave.

Hab. MExico, Sierra de las Aguas Escondidas 7000 feet (H. H. Smith).

A single female specimen.

. &

12. Anisia intrusa, sp. n., ¢.

Black ; the thorax with a humeral spot on each side and the abdomen with some lateral spots whitish ;

exterior cross-veins straight.

Length 2°75 millim.

Allied to A. egrota, but smaller in size and with a more prevailing black coloration. With the exception of

the humeral spots, the thorax is wholly black ; the light front borders of the abdominal segments are less

conspicuous and seem to be reduced to whitish spots at the sides; the macrochete of the abdomen are

shorter; the black frontal band is less broad; the pilosity on the underside of the femora is nearly

absent ; the wings are more hyaline; the apical and posterior cross-veins are straight.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen.

13. Anisia signata, sp. n., 2.

Ochraceous ; frontal band, thoracic stripes, base of the scutellum, hind borders of the abdominal segments,

third antennal joint, and legs black ; wings brownish. .

Length 6 millim.

Front narrower than the eyes, bright ochraceous at the sides; frontal bristles not descending beneath the root

of the antenne ; face and cheeks white, the cheeks narrow, with a fulvous reflection ; occiput blackish;

posterior orbits silvery; beard white. Antenne black, the basal joints rufous ; third joint three times as

long as the second ; arista thickened at the base. Proboscis (at least the terminal lips) rufous; (the palpi

are retracted in the oral cavity, but they seem to be black), Thoracic dorsum bright ochraceous, with four

black stripes—the intermediate ones linear, the outer ones in the form of a trigonal spot; behind the

transverse suture the whole surface is blackish, except on the posterior margin, where it becomes ochra-

ceous again; pleure grey; scutellum ochraceous, with the base black; metanotum black. Abdomen

elongate-oval, rufous, and somewhat transparent; first segment at the base and in the middle black;

second segment with a trigonal black spot on the hind margin, the spot anteriorly extended into a dorsal

line; third segment with a broad black hind border and a less distinct black dorsal line; anal segment

black on the posterior half; the front borders of the second and following segments with ochraceous

reflections ; macrochete long, not only on the disc but on the hind margin of each segment, except on

the first, where the discal macrochexte are absent. Legs black; the front coxe rufous, silvery-white

anteriorly ; the posterior coxe and the knees also somewhat rufous; hind tibie posteriorly with two long

bristles below the middle. Tegule yellow. The brownish coloration of the wings more intense along the

apical half of the costa; small cross-vein on the middle of the discal cell ; the end of the third vein and

of the apical cross-vein concave; curvature of the fourth vein rounded ; posterior cross-vein slightly

curved, nearly in the middle between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

14. Anisia nigella, sp.n., ¢ @.

Shining black; head whitish; abdomen with discal and marginal macrochete ; posterior cross-vein in the

middle between the small cross-vein and the curvature of the fourth vein.

Length nearly 4 millim.

BIOL. CENTR.-AMER., Dipt., Vol. II., August 1890. 2¢

194 DIPTERA.

With the exception of some whitish reflections on the head and on the front borders of the second and third

abdominal segments, unicolorous black. Front in the male narrower, in the female broader, than the

eyes ; frontal band black, with grey reflections ; frontal bristles descending as far as the end of the second

antennal joint; vibrissa surmounted by several shorter bristles. Antenne black, nearly as long as the

face ; third joint four or five times as long as the second; arista thickened to the proximal half. Proboscis

and palpi black, the palpi slightly thickened towards the tip. Abdomen conical ; on the front borders of

the second and third segments is a narrow white reflection. Legs black ; hind tibie with some long

bristles ; foot-claws and pulvilli a little elongate in the male. Tegule yellowish-white. Wings greyish-

hyaline ; small cross-vein on the middle of the discal cell; curvature of the fourth vein rounded ; apical

and posterior cross-veins slightly concave.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

Two male and two female specimens.

15. Anisia candicans, sp.n., 2.

Black; head silvery-white; thorax grey, with obsolete stripes; front borders of the second and following

segments whitish.

Length 5°5 millim.

Front as broad as the eyes; frontal band black; frontal bristles descending as far as the end of the second

antennal joint ; occiput grey. Antenne black, much shorter than the face; third joint four times as long

as the second; arista thickened not quite to the middle. Proboscis and palpi black. Thorax black,

covered with a whitish tomentum, which is most intense on the sides (sometimes the thoracic dorsum

appears black, with a white median stripe); scutellum blackish. Abdomen conical, black ; second and

' following segments with whitish front borders, which are interrupted by a black dorsal stripe ; on the

anal segment the white coloration is less conspicuous ; discal and marginal macrocheete present, the discal

ones shorter than the others. Legs black; hind tibie with a row of short bristles and a longer one below

the middle; foot-claws and pulvilli very short. Tegule white. Wings greyish-hyaline ; small cross-vein

on the middle of the discal cell; curvature of the fourth vein with a blunt angle; apical and posterior

cross-veins oblique and straight.

Hab. Mexico, Cuernavaca in Morelos (H. H. Smith).

A single female specimen.

16. Anisia congerens, sp.n., ¢ ?.

Thorax cinereous, with black stripes; abdomen black, with whitish front borders to the segments; frontal

band, antenne, palpi, and legs black.

Length 3°75 millim.

Head whitish ; front in the male narrower, in the female broader, than the eyes; frontal band as broad

as the lateral portions ; frontal bristles descending as far as the end of the second antennal joint. Antenne

shorter than the face; third joint three times as long as the second ; arista thickened to the proximal half.

Proboscis and palpi black. Thorax and scutellum greyish-cinereous ; thoracic dorsum before the trans-

verse suture with four black stripes, the outer stripes broader than the others; behind the suture a more

general blackish coloration ; base of the scutellum black. Abdomen conical, shining black; second and

following segments with white front borders, and with short discal and marginal macrochete. Front

tibie with a row of short bristles ; middle tibiee with some long bristles; hind. tibize with several bristles

of unequal length. ‘Tegule yellowish-grey (¢) or whitish (2). Wings of the male with a dilute

brownish tint, of the female greyish-hyaline ; small cross-vein on the middle of the discal cell; apical

cross-vein nearly straight; posterior cross-vein slightly concave.

Hab. Mexico, Chilpancingo 4600 feet, Amula 6000 feet, both in Guerrero (H. H.

Smith). .

A male and a female specimen.

ANISIA. 195

17. Anisia morionella, sp. n., 3.

Shining black ; thorax with obsolete stripes; palpi rufous; posterior cross-vein curved.

Length 5°25 millim.

Front narrowed behind and there narrower than the eyes ; frontal band black, broad ; frontal bristles descending

to beneath the second antennal joint ; lateral portions of the front, the face, cheeks, and posterior orbits

of the eyes whitish. Antenne black, distinctly shorter than the face; second joint bristly ; third joint

three times as long as the second; arista thickened in its proximal third. Proboscis black; palpi pale

rufous, filiform. Thorax and scutellum shining black; thoracic dorsum anteriorly with a slight grey

tomentum and inconspicuous black stripes. Abdomen conical, shining black, without any whitish

markings, but densely haired, and with discal and marginal macrochete. Legs long and slender, black ;

the femora with many bristly hairs; middle tibie with two long bristles, one on the inner and one on

the outer side; hind tibie outwardly with several bristles of unequal length; foot-claws and pulvilli

elongate, the pulvilli yellowish. Tegule yellowish-grey. Wings greyish, more obscure towards the costa ;

small cross-vein on the middle of the discal cell; apical and | posterior cross-veins oblique, the former

straight, the latter distinctly curved.

Hab. Mexico, Amula in Guerrero 6000 feet (Hl. H. Smith).

A single male specimen.

This species much resembles Degeeria longipes (antea, p. 155), but differs by the

absence of bristles on the facial ridges, and by the curved posterior cross-vein.

18. Anisia pullata, sp.n., ¢.

Shining black ; thorax anteriorly greyish, with obsolete stripes ; palpi rufous ; posterior cross-vein straight.

Length 3°5 millim.

Head greyish-white ; front as broad as the eyes; frontal band black, nearly as broad as the lateral portions ;

_ frontal bristles descending beneath the second antennal joint; eyes with some weak hairs (which, how-

ever, are only visible under a strong lens). Antenne black, shorter than the face; second joint with

short bristles; third joint three times as long as the second; arista thickened nearly to the middle.

Proboscis black ; palpi rufous, filiform. Thorax and scutellum shining black; thoracic dorsum ante-

riorly with some grey tomentum and indistinct black stripes, the grey tomentum most ‘conspicuous on the

shoulders and obliquely extended to a band on the pleure. Abdomen ovate, shining black, with discal

and marginal macrochete. Legs black; middle tibie with some long bristles; hind tibia outwardly

with several bristles of unequal length ; foot-claws and pulvilli short. Tegule whitish. Wings greyish-

hyaline, with a dilute brownish tint towards the costa ; small cross-vein nearly on the middle of the discal

cell; apical and posterior cross-veins straight.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single female specimen.

At first sight, this insect might be mistaken for the other sex of A. morionelia ;

but the striking difference in the form of the posterior cross-vein (distinctly curved in

A. morionella, straight in A. pullata) and its smaller size seem to prove the contrary.

19. Anisia inepta, sp. n., ?.

Cinereous ; frontal band, four thoracic stripes, hind borders of the abdominal segments, antenne, and legs

black ; palpi rufous.

Length 6 millim.

Front yellowish-cinereous, with nearly parallel sides, and a little narrower than the eyes ; frontal band linear ;

frontal bristles descending as far as the end of the second antennal joint; face, cheeks, and posterior

orbits of the eyes whitish. Antenne shorter than the face ; second joint bristly ; third joint three or

2¢ce2

196 DIPTERA.

four times as long as the second ; arista thickened in its proximal third. Proboscis black, its terminal

lips rufous; palpi rufous, thickened towards the tip. Thoracic dorsum yellowish-cinereous, with four

black stripes—the median ones linear, the outer ones interrupted at the transverse suture ; pleure grey ;

scutellum blackish, with the posterior half grey. Abdomen subconical ; first segment black ; the following

segments grey, with broad shining black hind borders, and with discal and marginal macrochete.

Middle tibie with some long bristles; hind tibie outwardly with several bristles of unequal length.

Tegule whitish. Wings greyish-hyaline ; small cross-vein nearly on the middle of the discal cell; apical

and posterior cross-veins straight.

Hab. Mexico, Tierra Colorada 2000 feet, Venta de Zopilote 2800 feet, and Amula

6000 feet, all in Guerrero (H. H. Smith).

Three female specimens.

20. Anisia accedens, sp. n., °.

Shining black ; thorax anteriorly grey, with four black stripes; abdomen with narrow white front borders to

the segments; palpi rufous.

Length 5 millim.

Head whitish ; front as broad as the eyes, slightly narrowed behind; frontal band black, as broad as the

lateral portions ; frontal bristles descending as far as the end of the second antennal joint. Antenne

black, shorter than the face ; second joint bristly ; third joint three times as long as the second; arista

thickened to the proximal half. Proboscis black, its terminal lips and the palpi rufous. Thorax and

scutellum black; thoracic dorsum before the transverse suture with greyish tomentum and four black

stripes ; laterally the grey tomentum is extended to a band which reaches from the shoulder to the root

of the wing and to another band on the pleure towards the middle coxw. Abdomen subconical, convex,

shining black; second and following segments with narrow white front borders, and with discal and

marginal macrochaxte. Legs black; middle tibie with some long bristles; hind tibie outwardly with

several bristles of unequal length. Tegule whitish. Wings greyish-hyaline; small cross-vein on the

middle of the discal cell; apical cross-vein oblique, straight; posterior cross-vein slightly curved.

Hab. Mzxico, Amula in Guerrero 6000 feet (H. H. Smith).

Two female specimens.

21, Anisia peregrina, sp. n., ¢.

Thorax whitish, with four black stripes; abdomen shining black, with white front borders to the segments ;

frontal band, antenne, proboscis, palpi, and legs rufous; third vein bristly.

Length 7 millim,

Head silvery-white ; front as broad as the eyes ; frontal band rufous, broader than the white lateral portions ;

frontal bristles descending a little beneath the root of the antenne ; vibrisse inserted near the oral

margin, surmounted by several other bristles. Antenne rufous, as long as the face; basal joints very

short, the second with some short bristles; third joint six times as long as the second; base of the arista

rufous and slightly thickened. Thorax and scutellum greyish-white ; thoracic dorsum with four black

stripes, the outer ones broader than the others; behind the transverse suture the stripes become

diffuse in a more general black coloration, which, however, does not reach the hind margin of the thorax..

Abdomen elliptical, convex, shining black; second and following segments with white front borders ;

sometimes a black dorsal stripe appears ; anal segment much shorter than the preceding segment ; all the

segments with long marginal macrochexte. Legs, including the coxe, yellowish-rufous, the tarsi brown ;

posterior tibie with some rather long bristles; foot-claws and pulvilli short. Tegule yellowish. Wings

with a yellowish-grey tint; small cross-vein on the middle of the discal cell ; third vein slightly arcuate

near its end, and with a row of short bristles extending from the base to the small cross-vein 3 curvature

of the fourth vein rounded ; apical cross-vein somewhat concave ; posterior cross-vein scarcely curved.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (Hf. H. Smith).

A single female specimen.

ANISIA. 197

22. Anisia fatua, sp. n., 9.

Cinereous ; antennex, proboscis, palpi, and legs rufous ; thorax with black lines ; last two abdominal segments

with blackish front borders; third vein bristly.

Length 5 millim.

Front cinereous, broader than the eyes; frontal band narrower than the lateral portions, dark rufous, but

sometimes inconspicuous in a greyish reflection ; frontal bristles descending as far as the end of the second

antennal joint; cheeks narrow, with a silvery-white reflection. Antenne rufous, nearly as long as the

face ; basal joints short ; third joint five times as long as the second; arista rufous at the base, thickened

to the proximal half. Proboscis and palpi pale rufous. Thorax and scutellum cinereous ; thoracic dorsum

with four blackish stripes, the median stripes linear. Abdomen ovate, dark cinereous ; first segment

blackish; third and anal segments with blackish front borders; all the segments with short marginal

macrochete ; ventral surface greyish. Legs rufous, the tarsi brownish ; tibise with short bristles ; foot-

claws and pulvilli short. Tegule and wings greyish-hyaline ; venation brownish; small cross-vein before

the middle of the discal cell; third vein with a row of short bristles from the base to beyond the small

cross-vein ; apical cross-vein slightly curved near its end; posterior cross-vein straight.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

A single female specimen.

23. Anisia nigrithorax, sp. n.,¢ °.

Thorax black; abdomen yellow, transparent, with a dorsal stripe and the hind margins of the segments black ;

anal segment rufous; antenne black ; palpi rufous ; legs piceous.

Length 4°5 millim.

Front in both sexes much narrower than the eyes; frontal band black, the lateral portions of the front grey

with a white reflection ; frontal bristles descending as far as the end of the second antennal joint ; face

and cheeks whitish, the cheeks narrow. Antenne as long as the face; second joint bristly ; third joint

four times as long as the second ; arista thickened at the base, the thickened part pale rufous. Proboscis

black, the terminal lips rufous; palpi pale rufous, Thorax and scutellum black; before the transverse

suture the thorax has an inconspicuous grey tomentum and obsolete black stripes. Abdomen conical,

yellow, transparent; a black dorsal stripe on the first three segments ; second and third segments with

black hind margins—on the second segment this margin is narrow, on the third it occupies the posterior

half; anal segment rufous ; macrochete only at the hind margins of the second and following segments ;

ventral surface yellow, in the male infuscated towards the anus. Legs brownish-black, with scattered

bristles ; foot-claws and pulvilli elongate in the male. Tegule yellowish-grey. Wings greyish on the

apical half, with a brownish tint, which is more intense on the costa and along the veins ; small cross-vein

on the middle or a little before the middle of the discal cell ; curvature of the fourth vein with a blunt

angle ; apical cross-vein nearly straight; posterior cross-vein distinctly curved,

Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith).

A male and a female specimen.

24. Anisia obscurifrons, sp. n., °.

Black ; head whitish ; thorax anteriorly and the front borders of the abdominal segments white; sides of the

abdomen, and the proboscis and palpi rufous.

Length 5:5 millim.

Front nearly as broad as the eyes; frontal band black, as broad as the lateral portions, which have a blackish

reflection ; frontal bristles descending as far as the second antennal joint. Eyes thinly pilose. Antenne

black, a little shorter than the face; second joint bristly ; third joint four times as long as the second ;

arista slightly thickened at the base. Palpi elongate, cylindrical; terminal lips of the proboscis large.

Thorax shining black, before the transverse suture with a white tomentum, which also covers the shoulders

and laterally is prolonged into an oblique band on the pleure. Abdomen elongate-oval, convex, shining

198 DIPTERA.

black ; the second and following segments with white front borders; first and second segments laterally

rufous and somewhat transparent; on the hind margins of the segments are long macrochete. Legs

black ; posterior tibiee with several rather long bristles. Tegule whitish. Wings hyaline, towards the

tip with a dilute brownish tint along the veins; small cross-vein a little before the middle of the discal

cell; apical and posterior cross-veins oblique and nearly straight.

Hab. Muxico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

95, Anisia aberrans, sp. n., 3 2.

Head whitish ; thorax grey, with black reflections ; abdomen rufous, the dorsal surface black, the sides with

white reflections ; frontal band, antenne, and legs black; palpi rufous.

Length 5-6 millim. .

Front white, as broad as the eyes ; frontal band as broad as the lateral portions; frontal bristles descending as

far as the end of the second antennal joint; face and cheeks white, somewhat silvery ; vibrisse surmounted

by several shorter bristles. Antenne nearly as long as the face; basal joints short ; third joint five times

as long as the second; arista thickened at the base. Proboscis black, with the terminal lips rufous ; palpi

filiform, pale rufous. Thorax whitish-grey, the thoracic dorsum with black reflections (which sometimes

are so largely extended that there remains only a grey transverse stripe at the suture); scutellum grey.

Abdomen conical ; first, second, and third segments on the dorsal part black, laterally yellowish-rufous

and somewhat transparent; anal segment black ; the second and following segments with white reflections

on the front borders; all the segments have rather long marginal macrochetz. Middle tibiw with some

long bristles ; hind tibiae with several bristles of unequal length; foot-claws and pulvilli short. Tegule

whitish. Wings with a dilute brownish tint; small cross-vein a little before the middle of the discal cell ;

apical cross-vein oblique and straight ; posterior cross-vein less oblique and very slightly curved.

Hab. Mexico, Amula 6000 feet, Omilteme 8000 feet, both in Guerrero (1. #.

Smith). |

Three male specimens.

A female example, from Omilteme, agrees with the above description of the male,

except in the following characters:—The antenne are a little shorter; the thoracic

dorsum shows the usual four black stripes before the transverse suture; and the

abdomen is more flattened and has the black coloration more extended. I have no

doubt that it belongs to the same species.

In its general facies and coloration this species bears a striking resemblance to

Myobia lepida (antead, p. 1385) and Hypostena obumbrata (antea, p. 143). From the

former it differs by the longer antennz, the broader front in the male, the vibrisse

inserted just at the oral margin, and the whitish (not ochraceous) head. From

Hypostena obumbrata it is at once to be distinguished by having no discal macrochete

on the abdomen.

26. Anisia macroptera, sp. n., 2.

Black ; head whitish; thorax grey, without stripes; abdomen with grey front borders to the segments ; legs

black, the knees and tibie reddish-piceous ; wings broad, with a costal spine.

Length 3°5 millim.

Front broader than the eyes ; frontal band black, as broad as the lateral portions ; frontal bristles not descending

beneath the root of the antenne ; face and cheeks rather broad. Antenne distinctly shorter than the

ANTSIA. 199

face ; third joint twice as long as the second; arista thickened at the base. Terminal lips of the proboscis

rufous; (palpi not visible in the unique specimen). Thorax and scutellum black, with some grey tomentum,

the thorax without stripes. Abdomen elongate-oval, with grey front borders to the segments; on the

hind margins of the second and following segments some rather weak macrochexte. Legs black, the knees

and tibize somewhat rufous; hind tibis outwardly with four long bristles. Tegule whitish. Wings

yellowish-hyaline, broad, with a costal spine; small cross-vein under the end of the first vein and beyond

the middle of the discal cell; curvature of the fourth vein rounded ; posterior cross-vein nearly straight,

in the middle between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico, near the city (H. H. Smith).

A single female specimen.

27. Anisia mucorea, sp. n., ¢ 2.

Black ; head white; thorax and scutellum with a bluish-grey tomentum ; front borders of the abdominal seg-

ments laterally with a white reflection ; palpi pale rufous.

Length 5°5 millim.

Head silvery-white ; front broader than the eyes; frontal band black, with a grey reflection, broader than the

lateral portions; frontal bristles descending as far as the end of the second antennal joint; face and

cheeks rather broad, with a rufous reflection. Antenne black, nearly as long as the face ; third joint five

, times as long as the second ; arista thickened to the proximal half. Proboscis black, with the terminal

lips rufous; palpi yellowish-rufous. Thorax and scutellum black, but covered with a bluish-grey

tomentum ; thoracic dorsum without stripes. Abdomen elliptical, shining black; the front borders of the

second and following segments laterally with white reflections ; macrochete only on the hind margins of

the segments. Legs black; hind tibie outwardly with several bristles of unequal length. Tegule

whitish. Wings hyaline; small cross-vein a little before the middle of the discal cell; curvature of the

fourth vein with a somewhat rounded angle; apical and posterior cross-veins nearly straight.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet, Cuernavaca in Morelos (H. H.

Smith).

Two males and one female specimen.

28. Anisia conspersa, sp. n., d

Black ; head silvery-white ; abdominal segments only with indications of whitish front borders.

Length 2°5-3 millim.

Front as broad as the eyes; frontal band black, as broad as the white lateral portions ; frontal bristles scarcely

descending beneath the root of the antenne; face and cheeks silvery-white, with black reflections.

Antennz black, shorter than the face; second joint with short bristles; third joint four times as long as

the second ; arista thickened to the proximal half. Proboscis and palpi black ; the palpi filiform, scarcely

thicker towards the tip. Thorax and scutellum unicolorous black. Abdomen elongate-oval, shining

black and black-haired ; second and third segments with inconspicuous whitish front borders; all the

segments with marginal macrochete. Legs black; middle tibia with some long bristles; hind. tibie

with several bristles of unequal length ; foot-claws and pulvilli short. Tegule brown. Wings brownish-

hyaline ; small cross-vein before the middle of the discal cell; apical cross-vein oblique and straight ;

posterior cross-vein more perpendicular, slightly concave, inserted nearly in the middle between the small

cross-vein and the curvature of the fourth vein.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

Four male specimens.

200 DIPTERA.

29. Anisia niveomarginata, sp. n., ?.

Black; head white; thorax laterally grey; abdomen with narrow snow-white front borders to the segments.

Length 3°5 millim.

Front white, broader than the eyes, with parallel sides; frontal band black, nearly as broad as the lateral

portions; frontal bristles descending scarcely beneath the root of the antennsz; face and cheeks white.

Antenne black, shorter than the face; third joint three times as long as the second; arista somewhat

pubescent, thickened to near the middle. Palpi rufous. Disc of the thorax black, the sides and the

pleure whitish-grey ; scutellum blackish. Abdomen obconical, shining black; second and following

segments with narrow, sharply limited, snow-white front borders, and with long marginal macrochete.

Legs black; middle tibie with some long bristles ; hind tibie outwardly with bristles of unequal length.

Tegule whitish. Wings hyaline; small cross-vein before the middle of the discal cell; apical cross-vein

slightly concave ; posterior cross-vein nearly straight.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen.

30. Anisia umbrina, sp. n., °.

Shining black ; head whitish ; thorax anteriorly light grey, with four black stripes; abdominal segments with

whitish front borders ; palpi yellowish; wings brownish.

Length 4 millim.

Front broader than the eyes; frontal band brownish-black, as broad as the lateral portions; frontal bristles

descending a little beneath the root of the antenne; cheeks beneath the eyes with a reddish-brown

reflection. Antenne black, nearly as long as the face; third joint four or five times as long as the

second ; arista microscopically pubescent, thickened to nearly half its length. Proboscis black, with the

terminal lips rufous; palpi small, yellowish. Thorax black, with a whitish-grey tomentum and four

black stripes, which are conspicuous only before the transverse suture; scutellum blackish. Abdomen

ovate, pointed towards the anus, shining black, with whitish front borders to the second and following

segments ; macrochete only at the hind margins of the segments, those on the second and third segments

longer than the others ; ventral surface unicolorous black. Legs black, with scattered bristles ; foot-claws

and pulvilli short. Tegule whitish. Wings brownish, more intensely so on the apical half; small cross-

vein on the middle of the discal cell; curvature of the fourth vein rounded; apical cross-vein oblique,

slightly concave ; posterior cross-vein perpendicular, nearly straight.

Hab. Mexico, Teapa in Tabasco (4. H. Smith).

A single female specimen.

31. Anisia opaca, sp. n., 2.

Thorax cinereous ; frontal band, four thoracic stripes, antennz, palpi, and legs black ; abdomen shining black,

with narrow whitish front borders to the segments; wings brownish.

Length 5 millim.

Front cinereous, a little broader than the eyes; frontal band as broad as the lateral portions; frontal bristles

descending to beneath the second antennal joint; face and cheeks yellowish-white. Antenne shorter

than the face; second joint bristly ; third joint four times as long as the second; arista thickened to near

the middle. Proboscis and palpi black, the palpi slightly thicker towards the tip. Thorax cinereous,

with four distinct black stripes, the outer stripes interrupted at the transverse suture; scutellum black.

Abdomen ovate, flattened, pointed towards the anus, shining black ; second and following segments with

narrow yellowish-white front borders; all the segments with rather long marginal macrochete. Middle

tibie with some long bristles; hind tibie outwardly with several bristles of unequal length. Tegule

yellowish. Wings brownish, especially at the base and costa and along the veins ; small cross-vein on, or

a little before, the middle of the discal cell; apical cross-vein straight to near its end, where it is a little

concave ; posterior cross-vein slightly curved, in some specimens nearly straight.

ANISIA. 201

Hab. Mexico, Sierra de las Aguas Escondidas 7000 feet, Omilteme 8000 feet, both in

Guerrero (H. H. Smith).

Six female specimens.

32. Anisia gagatina, sp.n., ¢ 2.

Black ; thorax anteriorly cinereous, with black stripes; abdominal segments with narrow whitish front borders ;

tegule and wings brownish.

Length 2-25-38 millim.

Head black ; front a little broader than the eyes; frontal band inconspicuous; frontal bristles descending as

far as the end of the second antennal joint. Antenne black, shorter than the face; third joint broad,

nearly four times as long as the second; arista thickened to the proximal half. Proboscis black, its

terminal lips rufous; palpi black, filiform. Thorax and scutellum black; thoracic dorsum before the

transverse suture with dark cinereous tomentum and four black stripes. Abdomen ovate, black; second

and following segments with narrow whitish front borders, and with long marginal macrochete. Legs

black ; middle tibiee with some long bristles ; hind tibie outwardly with bristles of unequal length ; foot-

claws and pulvilli in both sexes short. Tegule and wings brownish; small cross-vein before the middle

of the discal cell ; apical and posterior cross-veins straight, the apical more oblique.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A male and a female specimen.

33. Anisia nigrocincta, sp. n., 2.

Ochraceous ; frontal band, thoracic lines, hind borders of the abdominal segments, antenne, and legs black ;

palpi rufous.

Length 5°5 millim.

‘Front ochraceous, broader than the eyes; frontal band as broad as the lateral portions; frontal bristles

descending as far as the end of the second antennal joint ; face and cheeks whitish, or even silvery-white.

Antenne a little shorter than the face; second joint with some short bristles; third joint five times as

long as the second ; arista long, thickened in its proximal third. Proboscis black, with the terminal lips

rufous; palpi rufous, slightly thickened towards the tip. Thoracic dorsum ochraceous, with four black

lines, the outer ones interrupted at the transverse suture; pleure grey ; scutellum blackish at the base.

Abdomen elongate-oval, convex ; first segment black; the following segments ochraceous on the basal

half, shining black on the apical half; ventral surface greyish ; all the segments with long macrochete.

Middle and hind tibie with long bristles ; foot-claws and pulvilli short. Tegule yellowish-white. Wings

greyish-hyaline, somewhat darker at the end of the costa; small cross-vein a little before the middle of

the discal cell; apical cell attenuated towards its end; apical cross-vein concave ; posterior cross-vein in

the one example straight, in the other curved.

Hab. Mexico, Chilpancingo 4600 feet, Xucumanatlan 7000 feet, both in Guerrero

(H. H. Smith).

Two female specimens.

34. Anisia remissa, sp. n., °.

Cinereous ; face and cheeks whitish ; frontal band, four thoracic lines, hind borders of the abdominal segments,

antenne, and legs black ; palpi yellowish.

Length 5 millim.

Front cinereous, broader than the eyes; frontal band narrower than the lateral 1 portions ; frontal bristles

descending as far as the end of the second antennal joint; beard white. Antenne shorter than the face ;

second joint with short bristly hairs; third joint four times as long as the second ; arista microscopically

BIOL. CENTR.-AMER., Dipt., Vol. II., November 1890. 2d

S&S

DIPTERA.

pubescent, thickened to the proximal half. Proboscis black; palpi yellowish, slightly thickened towards

the tip. Thorax and scutellum yellowish-cinereous ; thoracic dorsum with four black lines, the outer

lines interrupted at the transverse suture; scutellum blackish at the base; pleura grey. Abdomen

elongate-oval ; first segment black ; the following segments cinereous, with broad black hind borders, and

with long marginal macrochete. Middle and hind tibie with long bristles, these being more numerous

on the hind than on the middle tibie. Tegule yellowish-white. Wings greyish-hyaline ; small cross-

vein on the middle of the discal cell; curvature of the fourth vein somewhat rounded; apical cross-vein

slightly, posterior cross-vein more distinctly, concave.

Hab. Muxico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

A single female specimen.

35. Anisia approximata, sp.n., °.

Grey ; head white; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne, and legs

black ; palpi rufous; third vein bristly.

Length 6°5 millim. " ;

Front white, with grey reflections, broader than the eyes; frontal band very narrow, linear; frontal bristles

descending as far as the end of the second antennal joint; face and cheeks silvery-white. Antenne

nearly as long as the face; third joint six times as long as the second ; arista thickened to the proximal

half. Proboscis black, its terminal lips dark rufous. Thoracic dorsum cinereous, with four black stripes,

the outer stripes interrupted at the transverse suture; pleure grey; scutellum black. Abdomen elongate-

oval; first segment black ; the following segments grey, with black reflections (which in one specimen are

extended in such a manner that there remain only narrow white front margins to the segments); all the

segments with long marginal macrocheete ; ventral surface blackish. Front tibiee outwardly with a row

of short bristles; middle tibie with some long bristles; hind tibiw outwardly with several bristles of

unequal length. Tegulw white. Wings greyish-hyaline; third vein with a row of short bristles extending

from the base to the small cross-vein ; curvature of the fourth vein rectangular; small cross-vein on the

middle of the discal cell ; apical cell concave at its base; posterior cross-vein nearly straight.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (#7. H. Smith).

Two female specimens.

36. Anisia palposa, sp. n., 2.

Black; head white; thorax light grey, with four black stripes; front borders of the abdominal segments

whitish ; palpi rufous, thick.

Length nearly 4 millim.

Head white, with grey reflections; front a little broader than the eyes; frontal band black, narrower than the

lateral portions ; frontal bristles descending as far as the end of the second antennal joint. Antenne

black, nearly as long as the face; second joint bristly; third joint three or four times as long as the

second, pointed at the tip; arista thickened at the base. Proboscis black; palpi pale rufous, propor-

tionately thick. Thorax with a whitish-grey tomentum, which is more conspicuous before the trans-

verse suture; thoracic dorsum with four black stripes (these in some lights very distinct, but in others

disappearing in a brownish-cinereous reflection); scutellum blackish, with grey reflection. Abdomen

conical, black, with whitish front borders to the second and following segments; on the second and third

segments this whitish colour is interrupted by a black dorsal line; macrochete are on the hind margins

of the segments, except on that of the first. Legs black; middle tibiee with some long bristles; hind tibia

outwardly with several bristles of unequal length. Tegule white. Wings greyish-hyaline, with a short

costal spine; small cross-vein distinctly before the middle of the discal cell ; apical cross-vein slightly

concave ; posterior cross-vein straight, perpendicular, in the middle between the small cross-vein and the

curvature of the fourth vein.

ANISIA. 2038

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

37. Anisia ciliata, sp.n., °.

Black; face and cheeks white; thorax anteriorly whitish, with four black stripes ; second and third abdominal

segments with white front borders. |

Length nearly 4 millim.

Front broader than the eyes; frontal band black, narrower than the lateral portions, which are blackish with

a white reflection; frontal bristles weak, descending scarcely beneath the root of the antenne; face,

cheeks, and posterior orbits blackish, with a silvery-white reflection, the cheeks rather broad. Antenne

black, distinctly shorter than the face; third joint three times as long as the second, rounded at the tip ;

arista somewhat pubescent, thickened at the base. Proboscis and palpi dark rufous, the palpi very small.

Thorax before the transverse suture with a whitish-grey tomentum and four black stripes ; pleura: with

almost silvery-white reflections. Abdomen elliptical, shining black; second and third segments with

white front borders; anal segment shorter than the preceding segment ; macrocheete rather long, only at

the hind margins of the second and following segments. Legs black, with weak bristles; middle tibie

without bristles ; hind tibize with a row of short bristles. Tegule white. Wings greyish-hyaline, rather

broad, rounded at the tip; small cross-vein under the end of the first vein and distinctly before the middle

of the discal cell; curvature of the fourth vein with a blunt angle; apical cell ending just at the wing’s

tip and rather broadly opened ; apical cross-vein oblique and concave; posterior cross-vein more per-

pendicular, nearly straight.

Hab. Mexico, Cuernavaca in Morelos (fH. H. Smith).

A single female specimen.

38. Anisia ophthalmica, sp. n., .

Blackish ; thorax cinereous, with black lines; second and third abdominal segments with white front borders ;

palpi yellow.

Length 5°5 millim.

Front black, with whitish reflections, narrowed behind and there narrower than the eyes ; frontal band black,

narrower than the lateral portions ; frontal bristles descending as far as the end of the second antennal

joint. Face and cheeks whitish ; eyes microscopically pubescent; beard white. Antenne black, a little

shorter than the face; second joint bristly ; third joint five times as long as the second; arista thickened

to near the middle. Proboscis black; palpi pale yellow, filiform. Thorax greyish-cinereous, with four

black lines, the outer lines interrupted at the transverse suture (seen from in front the thorax appears

blackish, with whitish lines) ; seutellum black, with grey margin. Abdomen obconical, shining black;

second and third segments with narrow white front borders; third and anal segments with long marginal

macrochete. Legs black; middle tibie with some long bristles; hind tibia with several bristles of

unequal length ; foot-claws and pulvilli a little elongate. Tegulz whitish. Wings hyaline, with a dilute

brownish tint along the costa; small cross-vein before the middle of the discal cell; apical cell attenuate

towards its end; apical and posterior cross-veins slightly concave.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

A single male specimen.

39. Anisia similis, sp. n., ¢.

Head whitish ; thorax cinereous, with four black stripes; abdomen shining black, with whitish front borders

to the segments ; frontal band, antenne, palpi, and legs black.

Length 5 millim.

204 DIPTERA.

Front slightly prominent, as broad as the eyes ; frontal band as broad as the lateral portions; frontal bristles

descending to beneath the second antennal joint. Antenne a little shorter than the face; second joint

bristly ; third joint four or five times as long as the second, pointed at the tip; arista long, thickened

at the base. Proboscis black, its terminal lips with a rufous margin ; palpi black, slightly thickened

towards the tip. Thorax dark cinereous, with four black stripes, the outer stripes interrupted at the

transverse suture ; scutellum black. Abdomen obconical, shining black; second and following segments

with whitish front borders; all the segments with long marginal macrochate. Middle tibiee with some

long bristles; hind tibiee with several bristles of unequal length ; foot-claws and pulvilli short. Tegule

whitish. Wings greyish-hyaline ; small cross-vein before the middle of the discal cell ; apical and posterior

cross-veins nearly straight.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

A single male specimen.

40. Anisia misella, sp.n., 9.

Cinereous ; frontal band, four thoracic stripes, reflections on the abdomen, antenna, and legs black; palpi

rufous.

Length 5-5 millim.

Front whitish-grey, a little broader than the eyes ; frontal band narrower than the lateral portions; frontal

bristles descending to beneath the second antennal joint ; face and cheeks whitish. Antenne shorter than

the face; third joint four times as long as the second, rounded at the tip; arista thickened to near the

middle. Proboscis black; palpi rufous, slightly thickened towards the tip. Thorax and scutellum cine-

reous ; thoracic dorsum with four black stripes—the median stripes linear, the outer ones interrupted at

the transverse suture. Abdomen ovate, pointed towards the anus; first segment black; the following

segments cinereous, with black reflections (chiefly on the hind margins), and a black dorsal stripe; long

macrochete on the hind margins of the second and third segments; anal segment with shorter bristly

hairs. Front tibie outwardly with a row of short bristles; middle tibiee with some long bristles; hind

tibie outwardly with several bristles of unequal length. Tegule whitish. Wings greyish-hyaline; small

cross-vein before the middle of the discal cell; apical cross-vein slightly concave ; posterior cross-vein

nearly straight.

Hab. Mexico, Amula in Guerrero 6000 feet (A. H. Smith).

Two female specimens.

41, Anisia infima, sp. n., 2.

Thorax cinereous, with black stripes; abdomen black, with whitish front borders to the segments ; head whitish ;

frontal band, antenne, palpi, and legs black.

Length 4 millim.

Front cinereous, a little broader than the eyes ; frontal band nearly as broad as the lateral portions ; frontal bristles

descending to beneath the second antennal joint; face and cheeks white. Antenne shorter than the face ;

third joint four times as long as the second ; arista thickened to the proximal half. Thorax and scutellum

cinereous; thoracic dorsum with four black stripes—the median stripes linear, the outer ones less regular

and broadly interrupted at the transverse suture. Abdomen ovate, pointed towards the anus, shining

black; second and following segments with whitish front borders, and with long marginal macrochete.

Middle tibiae with some long bristles ; hind tibiee outwardly with bristles of unequal length. Tegule

whitish. Wings greyish-hyaline; small cross-vein before the middle of the discal cell; apical cell narrowly

opened at a short distance before the tip of the wing; apical cross-vein slightly concave; posterior cross-

vein nearly straight.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen.

SPH ERIN A.—RHINOPHORA. 205

SPHARINA, gen. nov.*

Head large, broader than the thorax ; front not prominent; face perpendicular; facial ridges without bristles ;

eyes bare, descending nearly to the inferior part of the head. Antenne as long as the face; arista bare.

Proboscis exserted; palpi small, cylindrical, slightly thickened towards the tip. Abdomen broadly ovate,

nearly hemispherical, shorter than the thorax; macrochete short, only on the hind margins of the

segments. Legs with weak bristles. Wings longer than the abdomen, without a costal spine; apical

cell opened, ending in the tip of the wing; posterior cross-vein in the middle between the small cross-vein

and the curvature of the fourth vein, this curvature somewhat rounded.

Spherina is allied to the European genus Clytia, but differs from it by the long

antenne, the total absence of yellow or rufous coloration on the abdomen, and the

insertion of the posterior cross-vein in the middle of the apical cell.

1. Spherina nitidula, sp.n.,¢. (Tab. IV. figg. 16; 16a, head in profile.)

Shining black, the thorax with a whitish humeral spot on each side; palpi rufous.

Length 3 millim.

Front as broad as the eyes, black, opaque; frontal bristles short, not descending beneath the root of the

antenne ; vibrisse surmounted by two or three shorter bristles. Antenne black; second joint with some

short bristles; third joint four times as long as the second; arista thickened to the proximal half.

Terminal lips of the proboscis and palpi pale rufous. Thorax before the transverse suture with some

grey tomentum, on the shoulders more whitish ; two black stripes are not conspicuous. Abdomen scarcely

with any grey reflection on the front borders of the segments. Macrochetz of the thorax and abdomen

short and weak. Legs black, the femora rather thick; hind tibie outwardly with some short bristles ;

foot-claws and pulvilli very short. Tegule yellowish-white. Wings greyish-hyaline, small cross-vein

under the end of the auxiliary vein, and distinctly before the middle of the discal cell; apical cross-vein a

little concave near its end; posterior cross-vein straight.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

RHINOPHORA.

Rhinophora, Robineau-Desvoidy, Essai sur les Myodaires, p. 258 (18380).

The following species from Mexico, like those from Europe described by Schiner

(Fauna Austriaca, Dipt. i. p. 545), seems to possess most of the essential characters of

the genus Rhinophora. In the partly infuscated wings, in the neuration (a closed and

. long-petiolated apical cell), and in the presence of a row of bristles on the cheeks close

to the margin of the eye it especially agrees with Rhinophora ; it differs, however, from

the European species (2. atramentaria, R. melania, &c.) by the much longer antenne

and the bare arista.

1. Rhinophora levigata, sp.n.,¢. (Tab. IV. figg. 17, wing; 17a, head in

profile.)

Shining black; face and cheeks whitish; palpi rufous; arista thickened, bare; wings infuscated along the

costa and on the apical and posterior cross-veins.

Length nearly 3 millim.

* opaipa (globe).

206 DIPTERA.

Front broader than the eyes, blackish ; frontal bristles not descending beneath the root of the antenne ; face

and cheeks somewhat whitish: on the cheeks, close to the margin of the eyes, a row of four or five long

bristles. Antenne black, nearly as long as the face; third joint rather broad, four times as long as the

second ; arista thickened to near the tip. Abdomen conical; macrocheete only on the hind margins of

the segments. Legs black; the femora beneath and the tibie outwardly with rather long bristles.

Tegule whitish. Wings with a short costal spine, greyish-hyaline, blackish-brown along the costa and

on the exterior cross-veins; apical cell closed and rather long-petiolated ; small cross-vein on the middle

of the discal cell ; curvature of the fourth vein rectangular; apical and posterior cross-veins perpendicular

and straight, the latter in the middle between the small and the apical cross-veins; third vein with a row

of short bristles.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

LEUCOSTOMA.

Leucostoma, Meigen, in Illiger’s Magazin, ii. p. 280 (1808).

The principal characters of this genus are the following:—Face shorter than the

front; eyes bare; antenne short, the third joint being scarcely longer than the second ;

abdomen conical, in the female ending with a small forceps, marginal macrochete only

present ; foot-claws and pulvilli elongate in the male; tegule large; wings with the

apical cell closed and rather long-petiolated, the posterior cross-vein nearly in the

middle between the small cross-vein and the curvature of the fourth vein.

In the Central-American collection before me there are representatives of two species

belonging to the genus Leucostoma,-one of which seems to agree with the description of

L. analis, Meig., an insect hitherto only known from South Europe.

1. Leucostoma analis?

Tachina analis, Meigen, Syst. Beschr. europ. zweifl. Ins. iv. p. 290. no. 91.

Leucosioma analis, Schiner, Faun. Austr., Dipt. i. p. 548.

Tachina tetraptera, Meigen, loc. cit. no. 92, t. 41. fig. 25.

Shining black ; head whitish; in the male the third and anal segments greyish ; wings hyaline, yellowish at

the base; small cross-vein on or nearly on the middle of the discal cell.

Length 4°5-5°5 millim. .

Front narrowed behind and there narrower than the eyes; frontal band black; frontal bristles descending to

a little beneath the root of the antenne; vibrisse inserted at some distance above the oral margin ;

posterior orbits of the eyes long-haired. Antenne black; second joint with a rather long bristle; third

Joint one and a half times as long as the second; arista gradually tapering towards the tip. Proboscis

long and slender, with small terminal lips; palpi very small and thin, in some examples blackish, in

others pale rufous. Thorax, scutellum, and abdomen shining black ; humeral spots whitish. Abdomen

conical; in the male the third and anal segments have a greyish tomentum and whitish lateral spots, and

the anus is rounded, the latter having the genitals somewhat exserted beneath and turned towards the

venter; in the female the grey tomentum and the whitish spots on the last two segments are absent, and

the anus is pointed and armed with a small forceps; in both sexes the segments have long marginal

macrochete. Legs black; middle and hind tibie with long bristles; foot-claws and pulvilli elongate in

the male; the pulvilli yellowish. Tegule white. Wings hyaline, yellowish at the base; apical and

posterior cross-veins oblique, the former nearly straight, the latter sometimes curved.

LEUCOSTOMA.—CLISTA. 207

flab. Mexico, Tierra Colorada 2000 feet, Venta de Zopilote 2800 feet, Amula 6000

feet, all in Guerrero (H. H. Smith).—Soutu Evrops.

Three males and one female.

Though the rather short descriptions of Meigen and Schiner are applicable in all

respects, it is possible that the Mexican specimens may be not really conspecific with

the European. I therefore have given here a full description of the Mexican insect.

2. Leucostoma gravipes, sp. n., ¢.

Shining black ; thorax anteriorly and all the segments of the abdomen with grey reflections; wings greyish,

at the base dilute brownish ; small cross-vein beyond the middle of the discal cell.

Length 6 millim.

In most points agreeing with the preceding species, but more strongly built, the abdomen especially being

more convex and the legs more robust. The front is broader and wholly black, the frontal band opaque,

and the lateral portions somewhat shining; the face and cheeks are cinereous, with blackish reflections ;

the palpi are pale rufous, filiform; the thorax has anteriorly some grey tomentum, in which three broad

black bands are visible, the two lateral ones not reaching the front margin; the abdomen has over its

whole length grey reflections; the wings are less clear, and their base has a brownish tint; the small

cross-vein is distinctly beyond the middle of the discal cell; the apical cross-vein is slightly convex; the

posterior cross-vein is curved, §-like.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

A single male specimen.

CLISTA.

Clista, Meigen, Syst. Beschr. europ. zweifl. Ins. vii. p. 208 (1838).

The characters of this genus, as given by Meigen (/. ¢.), and more amply exposed by

Schiner (Fauna Austriaca, Dipt. i. p. 541), seem to be applicable to the small Tachinid-

fly from Mexico which is described below. The abdominal macrochete of the Mexican

insect are, however, less numerous and more degenerated than in the European species

(especially than in C. feda).

1. Clista musczeformis, sp. n. (92). (Tab. IV. figg. 18; 18a, wing.)

Small, ovate, shining black; head partly silvery-white ; basal joints of the antennz rufous.

Length 3°5 millim.

Head hemispherical ; face and sides of the front silvery-white, the front narrower than the eyes ; frontal band

velvety-black ; frontal bristles short and weak, not descending beneath the root of the antennz, those on

the vertex a little longer; cheeks rather broad and swollen, and showing, like the oral margin, some

reddish reflections. Antennz half as long as the face; basal joints rufous; third joint brownish-black,

scarcely longer than the second ; arista bare, thin. Proboscis not very prominent; palpi (so far as they

are visible) rufous. Thorax anteriorly with some light grey tomentum and indistinct black stripes.

Abdomen shining black, without any whitish reflection, as long as broad, the first three segments of equal

length, the anal segment much shorter; some short and weak macrochete are on the hind margins of the

third and anal segments. Legs black; foot-claws and pulvilli short. Tegule whitish, large, the uppcr

one shorter. Wings hyaline, longer than the abdomen; curvature of the fourth vein rounded ; apical cell

ending at the tip of the wing, closed, but not petiolated ; small cross-vein under the end of the first vein

208 DIPTERA.

and a little beyond the middle of the discal cell; posterior cross-vein straight, in the middle between the

small cross-vein and the curvature of the fourth vein.

Hab. Mexico, Medellin near Vera Cruz (1. H. Smith).

A single specimen, apparently a female.

MYOTHYRIA, gen. nov.*

Front scarcely prominent, moderately broad ; frontal bristles descending on each side in a single row nearly as

far as the second antennal joint ; face perpendicular or slightly inclined; facial ridges without bristles ;

cheeks rather narrow. Eyes bare. Antenne shorter than the face; third joint at least twice as long.as

the second; arista bare. Abdomen elliptical or elongate-oval; first segment shorter than the second ;

second and third segments in one species with discal and marginal, in the others only with marginal,

macrochete. Legs rather elongate and bristly. Wings longer than the abdomen, sometimes with a very

small costal spine; curvature of the fourth vein angular or arcuated ; apical cell closed at or a little before

the tip of the wing; posterior cross-vein in or beyond the middle, between the small cross-vein and

the curvature of the fourth vein.

If attention is paid to the relative length of the antennal joints and to the position

of the posterior cross-vein, Myothyria cannot be confounded with other genera having

bare eyes and the apical cell closed at the wing’s margin. In Frivaldskyia the third

antennal joint is much longer than in Myothyria; in Microsoma and Clista the third

antennal joint is not longer than the second ; in Petagnia the posterior cross-vein is

nearer to the small cross-vein. From Degeeria (some species of which have a closed or

nearly closed apical cell) the present genus differs by the absence of bristles on the

facial ridges.

In this genus I include the following three species :—

1. Second and third abdominal segments with discal and

marginal macrochete; curvature of the fourth vein

arcuated . . . . we we ww ee Ctrichosoma, v. d. Wulp.

Second and third abdominal segments with marginal

macrochetze only; curvature of the fourth vein

angular . . 1. ww ee eee ee

2. Posterior cross-vein curved; larger species (5°5-7 aan /

millim.) . . ......., . . ‘ . . majorina, v. d. Wulp. Ty io [Cow Alo]

Posterior cross-vein straight; smaller species (3 : s

millim.) . . 2... 2. es ee se.) . «68. degeerioides, v. d. Wulp.

1. Myothyria trichosoma, sp. n.,¢.

Yellowish-grey ; frontal band, four thoracic stripes, hind borders of the abdominal segments, antenne, and

legs black ; palpi rufous; abdomen with discal and marginal macrochete.

Length 3-5 millim.

Front yellowish, a little broader than the eyes; frontal band narrower than the lateral portions ; frontal bristles

descending as far as the end of the second antennal joint; face and cheeks whitish. Antenne nearly as

* pva (to close); Oupés (cell).

MYOTHYRIA. | 209

long as the face; third joint four times as long as the second; arista thickened at the base. Terminal

lips of the proboscis rufous; palpi pale rufous. Thorax and scutellum light grey, with some ochraceous

tint ; thoracic dorsum with four black stripes (the intermediate ones at a greater distance from each other

than from the outer ones), which behind the transverse suture disappear in a more general black colora-

tion; base of the scutellum black. Abdomen elongate-oval, pointed towards the anus, greyish; first

segment and broad hind borders to the following segments black ; discal and marginal macrochzetz present.

Legs bristly ; hind tibie outwardly with several, rather long bristles, Tegule whitish. Wings greyish-

hyaline; small cross-vein before the middle of the discal cell; curvature of the fourth vein somewhat

rounded ; apical and posterior cross-veins nearly straight, the former ending at the same point as the third

vein, the latter beyond the middle between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

2. Myothyria majorina, sp. n.,¢ 2. (Tab. IV. figg. 19¢; 19a, head in

profile.)

Cinereous; frontal band, four thoracic stripes, antenn, and legs black; palpi rufous; no discal macrochete

on the abdomen.

Length 5°5-7 millim.

Front cinereous, in the male as broad as, in the female broader than, the eyes; frontal band narrower than the

lateral portions; frontal bristles descending a little beneath the root of the antenne; face and cheeks

whitish ; vibrissse inserted at some distance above the oral margin. Antenne much shorter than the face ;

second joint bristly ; third joint three times as long as the second, with the tip somewhat pointed in front ;

arista thickened at the base. Proboscis black, its terminal lips rufous; palpi pale rufous. Thorax and

scutellum cinereous or yellowish-cinereous, with four black stripes, which are slightly prolonged behind

the transverse suture. Abdomen conical, of the same coloration as the thorax ; first segment blackish ;

the following segments in the male with more or less distinct brown hind borders, in the female with

blackish reflecting spots ; macrochetz long, only at the hind margins of the second and following segments.

Front tibize with short bristles; middle and hind tibise with several long bristles; foot-claws and pulvilli

elongate in the male. Tegule yellowish (¢) or greyish (2). Wings with a short costal spine, greyish-

hyaline, in most specimens somewhat infuscated towards the costa; small cross-vein on or a little before the

middle of the discal cell; apical cell narrow, especially towards its end, closed at the wing’s margin; cur-

vature of the fourth vein angular; apical cross-vein concave; posterior cross-vein curved.

Hab. Mexico, Chilpancingo 4600 feet, Amula 6000 feet, Xucumanatlan 7000 feet,

Omilteme 8000 feet, all in Guerrero, Teapa in Tabasco (Z. H. Smith).

Many male specimens, but only a single female.

3. Myothyria degeerioides, sp. n., 9

Blackish ; head whitish ; thorax anteriorly grey, with black stripes; abdomen with a narrow white front border

to the first and second segments ; no discal macrochete on the abdomen; palpi rufous.

Length nearly 3 millim.

Front broader than the eyes; frontal band black, as broad as the lateral portions ; ; frontal bristles descending

as far as the second antennal joint. Antenne black, a little shorter than the face; third joint three times

as long as the second ; arista thickened at the base. Proboscis black ; palpi pale rufous, thickened towards

the tip. Thorax with a grey tomentum on the shoulders, on the pleure, and before the transverse suture,

anteriorly with four black stripes. Abdomen ovate, shining black; second and third segments with

‘narrow white front borders, which are interrupted in the middle; long macrochete are on the hind

margins of the second and following segments. Legs black; hind tibie with some bristles of unequal

length. Tegule whitish. Wings greyish-hyaline, with a short costal spine; small cross-vein before the

BIOL. CENTR.-AMER., Dipt., Vol. Il., Apra/ 1891. Qe

210 DIPTERA.

middle of the discal cell; apical and posterior cross-veins nearly straight, the latter inserted in the middle

between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

I here give a list of the Mexican species of the group Tachinine which have been

described or characterized by M. Bigot; those previously diagnosed by the same author

are already noted by me under their respective genera, Jurinia and Hchinomyia.

Jurinia (?) barbata, Bigot, Ann. Soc. Ent. Fr. 1888, p. 78. no. 1.

— gonoides, Bigot, 1. c. no. 2.

Echinomyia rubrifrons, Bigot, 1. c. p. 80. no. 2.

cora, Bigot, 1. c. p. 81. no. 3.

macrocera, Bigot, 1. c. p. 81. no. 4.

Bigot, 1. c. p. 82. no. 5.

cinerascens, Bigot, 1. c. p. 256. no. 12*.

Micropalpus nigrifrons, Bigot, 1. c. p. 263. no. 49.

Fabricia infumata, Bigot, Bull. Soc. Ent. Fr. 1887, p. cxli; Ann. Soc. Ent. Fr.

1888, p. 85. no. 1.

Frontina rufostylata, Bigot, Bull. Soc. Ent. Fr. 1887, p. cxli; Ann. Soc. Ent. Fr.

1888, p. 83. no. I.

chrysopygata, Bigot, Ann. Soc. Ent. Fr. 1888, p. 84. no. 2.

Elachipalpus nigrifrons, Bigot, Bull. Soc. Ent. Fr. 1887, p. cxli.

Cestonia nigra, Bigot, Ann. Soc. Ent. Fr. 1888, p. 259. no. 31.

Macquartia atrifrons, Bigot, Ann. Soc. Ent. Fr. 1888, p. 259. no. 32.

Prosopea americana, Bigot, 1. c. p. 260. no. 34.

The genera Fabricia, Frontina, Elachipalpus, Cestonia, Macquartia, and Prosopea are

not mentioned in my synoptical table of the Central-American genera of Tachinine,

pp. 5-7, nor in the supplementary table, pp. 41-44. The genus Prosopea, Rond.,

is closely allied to Prospherysa, v.d. Wulp ; Prosopea americana, Big., of which I have‘

examined a typical specimen, is even identical with the subsequently described Pro-

spherysa contigua, v. d. Wulp (anted, p. 120).

In the ‘ Denkschr. der kais. Akad. der Wissensch. Wien,’ lvi. pp. 69 e¢ seq. (1889),

Prof. Fr. Brauer and Herr J. E. von Bergenstamm have published a long paper with

highly interesting observations and remarks on the classification of the “ Muscide

Calyptere.” In this work several new species, forming types of new genera, are

described, and among them the following three Tachinid-flies from Mexico :—Phasio-

pteryx bilimeki (1.c. p. 147), Myiopharus metopia (1. c. p. 161), and Masipoda geminata

* Examples of this species are contained in the recently received collections, and will be mentioned with

others in a Supplement.

DEXIN. 211

(l.c. p. 162). Phasiopteryx bilimeki, Br. & v. Berg., is conspecific with the insect I have

described (anted, p. 166) under the name Neoptera rufa, and Masipoda geminata, Br.

& v. Berg., with Exorista latimana (anted, p. 67). As my descriptions were published

some months later than those of Brauer and v. Bergenstamm, the names given by these

authors have priority. A typical female specimen of Pyrrhosia ochracea, Bigot (Ann.

Soc. Ent. Fr. 1888, p. 268. no. 78), kindly sent to me by M. Bigot for examination,

proves to be conspecific with Phasiopteryxr bilimeki, 2; Bigot’s very short description

includes both sexes, but contains nothing about the abnormal shape of the wings and

their neuration in the male sex.

Group DEXIN A.

The insects of this group are nearly allied to the “ Tachinine,” but usually differ

from them by the feathered or plumose arista and by the more elongate legs.

The

frontal bristles, always in a single row on each side of the frontal band, do not descend

beneath the root of the antenne; whilst in the “ Tachinine”

close to the basal joints of the antenne or still lower (the genus Chetona only, in which

the frontal bristles descend as far as the second antennal joint, forms an exception).

The numerous Central-American genera, several of which are described as new, may

be tabulated thus :—

some of them are placed

1. Proboscis longer than the head . . oe 2.

Proboscis thick and retractile, shorter than the head 10.

2. Proboscis slender and rigid, at least as long as the head and

thorax together, with small or rudimentary terminal lips. 3.

Proboscis a little longer than the head, with well developed

terminal lips 4.

. Scutellum and abdomen armed with spines .

Scutellum and abdomen with the usual macrochete .

. Abdomen broadly ovate, distinctly broader than the thorax,

Hystrisiphona, Big. 213

Prosena, St.-F. & Serv. ZIG

spinose or densely covered with macrochetz 5.

Abdomen elongate-oval or conical, usually not broader than ‘the

thorax ; macrochetz always regularly arranged . 6.

. Vibrissze inserted at some distance above the oral margin

Vibrissz inserted just at the oral margin

. Cheeks below the eyes at least half as long as the longitudinal

Hystrichodezia, v. Réder. 2 / 5

Bathydexia, v. d. Wulp. 2 2 2

‘diameter of the eyes . . 7.

Cheeks below the eyes very short, at most equalling a third of 7

the longitudinal diameter of the eyes . 9.

. Curvature of the fourth vein with an appendage

Curvature of the fourth vein without appendage

Scotiptera, Macq. 223

8. |

262

== 10.

11.

12.

13.

14,

15.

16.

17.

18.

DIPTERA.

. Abdomen with discal and marginal macrochetz .

Abdomen only with marginal macrochetz

. Autenne inserted on a line drawn through the middle of ‘the

eyes; vibrissal swellings * parallel

Antenne inserted above a line drawn through the middle of the

eyes; vibrissal swellings divergent towards the oral margin.

Cheeks below the eyes at least as long as half the longitudinal

diameter of theeyes . . . . . . ee .

Cheeks below the eyes very narrow, the eyes descending to

the inferior part of the head or nearly so

Apical cell closed and sometimes petiolated .

Apical cellopened . . . . . se

Posterior cross-vein beyond the middle between the small

cross-vein and the curvature of the fourth vein. .

Posterior cross-vein before the middle between the small

cross-vein and the curvature of the fourth vein

Face in the middle distinctly carinated. .

Face not carinated oe

Antenne nearly as long as the face .

Antennz much shorter than the face . . . cn

Antennz inserted on a line drawn through the middle of the eyes.

Antenne inserted on or below a line drawn through the middle

oftheeyes . . .... 2... ee .

Arista short-haired ; posterior cross-vein in the middle be-

tween the small cross-vein and the curvature of the fourth

vein . oe . woe ee

Arista distinctly plumose ; posterior cross-vein beyond the

middle between the small cross-vein and the curvature of

the fourth vein... , . .

Eyes small; their longitudinal diameter less than the length

of the cheeks beneath them . woe . .

Eyes of usual size; their longitudinal diameter larger than

the length of the cheeks beneaththem . . . . .

Costa of the wings bristly and with a costal spine ; posterior

cross-vein in the middle between the small cross-vein and

the curvature of the fourth vein.

Rhynchodexia, Big. 2 2 5”

Myocera, Rob.-Desv. 236

Tromodesia, Rond. 2 3‘)

Stomatodexia, Br. & v. B. 23 g

11.

23.

12.

13.

Megaparia, v.d. Wulp. 2 4 0

Microchetina, v.d. Wulp. 2 4 0

14,

15.

Camarona, v.d. Wulp. 24)

Dexia, Meig. 29

16.

17.

Acronacantha, v.d. Wulp. 2-4 3

Dexiosoma, Rond. 2. 47¥

Macrometopa, Br. & v.B. 2YS~

18.

Stenodexia, v.d. Wulp. 244

* By the term “ vibrissal swellings” I mean the lower part of the elevations which on both sides of the

face descend from above the root of the antenne, and between which the antenney (in the “ Muscide Caly-

ptere”) usually rest in a more or less deepened groove, this in the Dexine being often divided into two parts

by a longitudinal carina in the middle.

The vibrissal swellings are seldom wholly parallel, but in most of the

genera convergent towards the oral margin, forming a blunt angle, on which the vibrisse are inserted. Brauer

and von Bergenstamm in their very interesting work on the “ Muscaria Schizometopa” [Denkschr. der kais.

Akad. der Wissensch. Wien, lvi. (1889)] have attached considerable importance to the shape of these eleva-

tions (Vibrissenleiste, Vibrissenwulste, Vibrissenecke), which sometimes offer good generic characters, though

they have been totally neglected hitherto.

19.

HYSTRISIPHONA.

Costa of the wings without bristles or spine ; posterior cross-

vein beyond the middle between the small cross-vein and

the curvature of the fourth vein

Abdomen conical or elongate-oval woe ee

Abdomen cylindrical or elongate-conical, much longer than

the thorax .

. Middle legs of the male disproportionately long .

Middle legs not or scarcely longer than the others .

. Apical cell widely opened; wings unicolorous

Apical cell narrowly opened ; wings unicolorous, nearly hyaline.

. Anal segment shorter than the preceding segment; eyes

bare . sone Loe oe

Anal segment very elongate i in the male ; eyes pilose

. Abdomen cylindrical, much longer than the thorax, and

attenuated at the base . . woe ees

Abdomen oval, conical, or subeylindrical, but not narrower at

the base

. Antenne inserted distinctly above a line drawn through ‘the

middle of the eyes (arista very long) . . tee

Antenne inserted on or below a line drawn through the

middle of the eyes .

. Third vein with a row of bristles .

Third vein without bristles (except at the base) Lee

. Abdomen yellow, with or without black markings .

Abdomen black, sometimes with whitish or cinereous portions .

. Apical cell broadly opened .

Apical cell narrowly opened

.. Curvature of the fourth vein arcuated .

Curvature of the fourth vein angular

. Arista short-haired

Arista distinctly plumose

. Eyes bare . 1. 1. we eee ee

Eyes pilose .

HYSTRISIPHONA.

Hystrisyphona, Bigot, Revue et Mag. Zool. 1859, p. 309.

213

19.

20.

tal \

4 ay

21 ee ee

Sb ¥

° pee AS .¢ \ rian, ub

Cholomyia, Big. 72 ¥ em wat 4, ue

Melaleuca, v. d. Wulp. IK.

Euantha, v. d. Wulp. 2.4 ¥ ap

22.

W Ce Ley moa

a iW. pls uf

Leptoda, v.d. Wulp. 2 52

Uramyia, Rob.-Desv. 2-5;

Cordyligaster, Macq. 25 2

24.

Chetona, v. d. Wulp. 2 S53

20.

Thelairodes, v.d. Wulp. 2 5°¥

26.

27.

28.

Xanthodexia, v. d. Wulp. 2 9G

Calodexia, v.d. Wulp. 257

Rhombothyria, v. d. Wulp. 2 $9

29.

Pseudomorinia, v.d. Wulp. 2 S~7

30.

Morinia, Meig. “2-GO

Comyops, v.d. Wulp. 2 G2

The genus Hystrisiphona is easily recognizable by the very long and filiform pro-

boscis and the plumose arista, and by the scutellum and abdomen being densely covered

with spines. |

1. Hystrisiphona nigra.

_ Hystrisyphona nigra, Bigot, |. c.

Hab. Mexico (coll. Bigot).

214 DIPTERA.

To Bigot’s short description of this species I will add some particulars from a typical

fernale specimen which the author has been kind enough to send me for examination.

The front is as broad as the eyes; the frontal band scarcely differs in coloration from

the lateral portions; the frontal bristles descend as far as the root of the antenne ;

orbital bristles areabsent. The face is distinctly carinated ; the inferior portion of the

cheeks equals two-thirds of the longitudinal diameter of the eyes; the vibrisse are at

some distance above the oral margin. The antenne are inserted below a line drawn

through the middle of the eyes. The abdomen, and also the scutellum, is densely

armed with erect spines; on the hind margin of the scutellum are some long macro-

cheetze ; the abdomen is broadly ovate. The legs are black, the tibia, however, some-

what rufo-piceous; the bristles of the front femora are regularly arranged and form a

row on the upper- and another on the underside, those of the underside being the

longest ; the middle and hind femora have long and stout bristles on the underside ;

the tibia have outwardly several bristles, those of the front pair being shorter than the

others. The tegulz are dark brown, the wings grey ; the small cross-vein stands a little

before the middle of the discal cell; the curvature of the fourth vein is angular, but not

appendiculated, the apical cross-vein concave, the posterior cross-vein slightly curved.

PROSENA.

Prosena, St.-Fargeau & Serville, Encycl. Méth. x. p. 500 (1825).

This genus, like the preceding (Hystrisiphona) is characterized by the long filiform

proboscis, with small or rudimentary terminal lips, and by the plumose arista; it differs

from Hystrisiphona by the normal macrochetz on the scutellum and abdomen.

In the Central-American collections before me I find specimens of five species

belonging to it, which may be distinguished as follows :— |

1. Macrocheetze on the disc and on the hind margin of the abdo-

minal segments . . . . . .s. - oe ee we

Macrochetze only on the hind margin of the abdominal

segments. . . . ©. «© «© 2. 6 . A,

2. Abdomen and legs yellowish-rufous . . . . . . . . . Jacertosa, v. d. Wulp. vi" ha

Abdomen and legs black or piceous . . . . ..... 38z

3. Abdomen unicolorous black. . . . . . . .. . . .. valida, Br. & v. B. Pal

Abdomen black, with cinereous or whitish reflecting spots . . tessellans, v. d. Wulp.2rse fn

4. Cinereous species; foot-claws and pulvilli short in both sexes. curvirostris, Big. \y x

Black species; foot-claws and pulvilli elongate in the male |

SCX ew ee ee ew we. melena, v. dd. Wulp. bale

Among the above-mentioned species there is but a single one, P. curvirostris, which

shows all the generic characters of the common European form, P. siberita (Fabr.), i. ¢

having the foot-claws and pulvilli short in both sexes and only marginal macrochete on

vy . ae

Pty den - fad(yyorers alwih +

n L rane a A Db . 7 “ a foo.

} ) tee 4 by Le, toh, 3 NL. % fet a etd ; i layel A t . (A A f ‘ ;

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. d

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é ‘i Bet y \ BET Ey H f pps ¥ fheawe, aed Ober va. “4 '

( fi

PROSENA. 215

the abdominal segments. The others differ in some respects from it: P. valida is the

type of the genus Mochlosoma, Br. & v. Berg., and P. lacertosa, P. tessellans, and

P. melena each possess characters which might be taken as generic, but I prefer at

present to keep them united in the old and well-known genus Prosena.

1. Prosena lacertosa, sp. n.,3 9. (Tab. V. figg. 1; 1a, head.)

Yellowish-rufous; thorax cinereous, with obsolete dark lines; antenne, palpi, and legs rufous, the tarsi black ;

abdomen with discal and marginal macrochete.

Length 10-13 millim.

Of a vigorous form and a yellowish-rufous coloration. Head with whitish reflections; front of the male

narrowed behind in such a manner that the eyes are nearly contiguous, that of the female broader than

the eyes ; frontal band brownish-red, on “both sides with a row of bristles, which descends as far as the

root of the antennz ; cheeks broad; beard yellowish. Antenne short, rufous ; third joint brown on the

apical half, a little longer than the second, which is prominent and bears one or two rather long bristles ;

arista black, thickened in its proximal half, and moderately long-plumose. Proboscis black, nearly as

long as the head and thorax; palpi small, rufous, bristly at the end. Thorax yellowish-cinereous, with

five not very distinct dark lines, the three median of which are close together at the front side and the two

outer ones interrupted at the transverse suture ; scutellum almost of the same colour as the thorax, but

somewhat more ochraceous ; in the male the thoracic dorsum and the scutellum are beset with black pile,

this being also present in the female, but shorter and less conspicuous. Abdomen ovate, convex, rufous,

slightly transparent, with silvery-yellowish-white reflecting spots; some specimens have a blackish dorsal

band, which is more or less interrupted on the incisions, in others this band is quite absent ; macrochete

are on the hind margins of the segments, and, in addition, there are two discal macrocheste on the second

and third segments and some in the middle of the anal segment. Legs rufous, with black tarsi; coxe on

the front side densely clothed with black pile, which in the female is more bristly ; femora and tibize with

many long bristles; first joint of the tarsi shorter than the tibie ; foot-claws and pulvilli elongate in the

male, the pulvilli greyish. Tegule rufous. Wings rufous at the base and along the basal part of the

costa, for the rest greyish ; veins testaceous, fuscous towards the apex; small cross-vein before the middle

of the discal cell ; curvature of the fourth vein with an acute angle; apical cross-vein concave; posterior

ceross-vein slightly curved.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer).

_ Three male and three female specimens.

Prosena longitarsis, Macq. (Dipt. Exot. ii. 3, p. 92, t. 11. fig. 2), from Bogota, seems

to be very nearly allied to this species; but differs by the somewhat thickened and

recurved terminal lips of the proboscis, the whitish-grey colour of the thorax, the

scutellum fulvous only at the hind margin, and the first joint of the tarsi as long as the

tibize.

2. Prosena valida. (Tab. V. figg.2; 2a, head.) 7) "97 CUS den

Mochlosoma validum, Brauer & v. Bergenst. Denkschr. der kais. Akad. der Wissensch. Wien, lvi.

pp. 126, 168, t. 8. fig. 102.

Black ; head greyish-white ; thoracic dorsum anteriorly dark grey, with obsolete black stripes ; abdomen with

discal and marginal macrochete ; wings brownish-grey.

Length 10°5 millim.

g. Front narrowed towards the vertex and there narrower than the eyes; frontal band broad, blackish-brown ;

frontal bristles scarcely descending beneath the root of the antenne ; posterior orbits of the eyes with long

bristly hairs ; cheeks inferiorly broad, nearly equalling half the longitudinal diameter of the eyes; face

yy of (

) PL SORK AED De pa.

216 DIPTERA. '

distinctly carinated in the middle ; vibrisse inserted much above the oral margin, which is slightly pro-

minent, somewhat rufous, and beset with a row of long bristles. Antenne short, inserted below a line

drawn through the middle of the eyes; basal joints dark rufous; second joint with short bristles; third

joint brown, one and a half times as long as the second; arista distinctly plumose, thickened at the base.

Proboscis black, slender, nearly as long as the body, and with rudimentary terminal lips ; palpi rufous,

small, filiform. Thorax and scutellum black; thoracic dorsum anteriorly greyish, with obsolete black

stripes. Abdomen ovate, black ; second and following segments with many discal and marginal macrocheete.

Legs long and slender, black, the knees and sometimes the tibie: dark rufous; tibie with long bristles ;

foot-claws and pulvilli elongate, the pulvilli yellowish-grey. Tegule brown, with a yellowish margin.

Wings brownish-grey ; apical cell opened at some distance from the wing’s tip ; small cross-vein a little

before the middle of the discal cell; curvature of the fourth vein angular but without appendage ; apical

eross-vein concave ; posterior cross-vein slightly curved. —

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

Several male specimens.

A single female example from the same locality agrees in all respects with the

above description, except the usual sexual differences (a broader front and short foot-

claws and pulvilli) and the macrochetz on the abdomen being less numerous and more

regularly arranged on the disc and hind margins of the segments.

The identity with Mochlosoma validum, Br. & v. Bergenst., is stated by Prof. Brauer

himself, who has seen a specimen.

In its general aspect, and also by the very long proboscis, Prosena valida bears a

striking resemblance to Hystrisiphona niyra, Big., except that the scutellum and

abdomen are not armed with spines. )

3. Prosena tessellans, sp.n,g @. § 9 * fo fh 0

Blackish ; head whitish, with rufous reflections ; antenne rufous ; abdomen with cinereous and white reflecting

spots, and with discal and marginal macrochete; legs black, the tibia sometimes piceous; wings

greyish.

Length 7-11 millim.

This species varies in size and in the intensity of the coloration. Head whitish ; front of the male very much

narrowed behind, the eyes being nearly contiguous on the vertex, that of the female broader than the

eyes; frontal band black or brown, or even brownish-red, on both sides with several bristles, which do

not descend beneath the root of the antenne ; cheeks broad, with a brownish-red reflection, which is also

visible at the oral margin. Antenne short, rufous; second joint with a long and some short bristles ;

third joint a little longer than the second, usually brown at the tip; arista black, thickened at the base,

thinly plumose in the middle. Proboscis black, two or three times as long as the head; palpi short,

rufous. Thorax and scutellum blackish, with more or less distinct cinereous tomentum and beset with

black hairs and macrochete; in the less obscure specimens (usually females) five black stripes (the three

median close together) become conspicuous on the thoracic dorsum. Abdomen conical (3) or elongate-

oval (2), with many discal and marginal macrochete; in the darkest examples it is black, with

grey and white reflecting spots, in lighter specimens it is cinereous, with black and white -reflections.

Legs black, sometimes the tibia piceous or even brownish-red ; coxse on the front side with long black

pile; foot-claws and pulvilli elongate in the male, the pulvilli dark yellowish-grey.. Tegulee yellowish-

white. Wings greyish-hyaline, with black veins; small cross-vein nearly on the middle of the discal cell ;

curvature of the fourth vein rectangular and a little rounded ; apical cross-vein distinctly concave ; poste-

rior cross-vein oblique and very slightly curved, nearly straight.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer), ‘Tierra Colorada, Rincon,

PROSENA. 217

Tepetlapa, Hacienda de la Imagen, Chilpancingo, Sierra de las Aguas Escondidas, and

Omilteme, all in Guerrero, 2000-8000 feet (H. H. Smith).

A large series of specimens of both sexes.

This insect may perhaps be conspecific with Prosena mexicana, Macq. (Dipt. Exot.,

Suppl. 4, p. 231. no. 7, t. 21. f. 12); but the coloration of the abdomen seems to be

- different.

4. Prosena curvirostris. © >* |

Prosena curvirostris, Bigot, Ann. Soc. Ent. Fr. 1888, p. 264.

Cinereous ; antenne and palpi rufous; thorax with three black stripes; abdomen with brown or blackish '

reflecting spots and with marginal (but not discal) macrocheete on the segments; legs black.

Length 7:5 millim.

Head whitish-grey ; front of the male narrow behind, that of the female broader than the eyes; frontal band

piceous, reddish towards the antennx; frontal bristles descending as far as the root of the antenne;

close to the oral margin some rufous reflection. Antenne much shorter than the face, rufous; second

joint with short bristles; third joint twice as long as the second, infuscated towards the tip ; arista black,

densely plumose, thickened at the base. Proboseis black, as long as the head and thorax together; palpi

thin, rufous. The median band of the thorax is narrowed towards the head and sometimes accompanied

on each side by a black line. Abdomen of the male conical, yellowish-cinereous, with a more or less

distinct, interrupted, blackish dorsal stripe and brownish or blackish reflecting spots at the hind borders

of the segments—that of the female ovate, cinereous (without a yellowish tint), and with blackish reflecting

spots as in the male. Legs with weak bristles; foot-claws and pulvilli in both sexes short. Tegule

yellowish-white. Wings greyish, with black venation ; small cross-vein on the middle of the discal cell ;

curvature-of the fourth vein with a blunt angle; apical cell opened at a very short distance from the

wing’s tip; apical cross-vein nearly straight ; posterior cross-vein oblique and slightly curved.

Hab. Mexico (coll. Bigot), Tierra Colorada 2000 feet, Rincon 2800 feet, Chilpan-

cingo 4600 feet, Amula 6000 feet, all in Guerrero, Atoyac and Fortin in Vera Cruz,

Teapa in Tabasco (H. H. Smith); Costa Rica, Rio Sucio (Rogers).

Several examples of both sexes:

The identity is secured by comparison with a typical specimen which M. Bigot has

been kind enough to send me for examination.

5. Prosena meleena, sp.n.,¢ 2. Pea

Shining black; head whitish ; abdominal segments only with marginal macrochasta ; tegule and base of the

wings brownish.

Length 7-9°5 millim.

Front slightly prominent, blackish, laterally bordered with white, in the male narrowed behind, in the female

broader than the eyes; frontal bristles descending as far as the root of the antennw; face and cheeks

whitish, the face distinctly carinated, its median portion with a rufous, the cheeks with a blackish, reflection.

Antennz black, much shorter than the face; second joint bristly ; third joint three times as long as the

second; arista densely plumose, thickened at the base. Proboscis and palpi black; the proboscis a little

shorter than the head and thorax; the palpi slender, scarcely thickened towards the tip. Thorax, scu-

tellum, and abdomen shining black, the thorax anteriorly with four obsolete whitish spots (two median

and two humeral); the thorax is densely covered with black hairs; the scutellum bears some long

macrochete. Abdomen of the male subconical, in most of the specimens more or less reddish laterally,

that of the female ovate; on the second and following segments are marginal (but no discal) macrochete.

BIOL. CENTR.-AMER., Dipt., Vol. II., April 1891. 2f

218 DIPTERA.

Legs black, rather slender; femora with many bristly hairs; tibiz with some scattered bristles; foot-

claws and pulvilli elongate in the male, short in the female ; the pulvilli yellowish-grey. Tegule brown.

Wings greyish-hyaline, the base and costa brownish ; small cross-vein nearly on the middle of the discal

cell; curvature of the fourth vein with a blunt angle; apical and posterior cross-veins oblique and

straight.

Hab. Mexico, Xucumanatlan 7000 feet, and Omilteme 8000 feet, both in Guerrero

(H, H. Smith).

Four male and eight female specimens.

Fat

. +,

Bigot has described two species as belonging to the genus Prosena, both from

Mexico :—

Prosena maculifera, Bigot, Ann. Soc. Ent. Fr. 1888, p. 264. no. 55.

obscura, Bigot, |. c. no. 56.

I have examined the typical examples of both: P. maculifera is a female of Stoma-

todexia cothurnata, Wiedem.; P. obscura is identical with Rhamphinina anthracina,

Big., a species included by me in the genus Rhynchodevia.

One Mexican species of Prosena has also been described by Macquart :—

Prosena mexicana, Macq., Dipt. Exot., Suppl. 4, p. 231. no. 7, t. 21. f. 12.

HYSTRICHODEXIA.

Hystrichodexia, von Roder, Stett. ent. Zeit. 1886, p. 266.

This genus is characterized by the short antenne, the plumose arista, the carinated

face, the proboscis as long as, or a little longer than, the head, and nearly the whole

surface of the abdomen densely armed with strong, or even spinose, macrochete. The

cheeks are broad, their lower portion being a little shorter than the longitudinal

diameter of the eyes; the vibrissal swellings are nearly parallel ; the vibrisse are

inserted at some distance above the oral margin; the antenne are inserted on or a little

below a line drawn through the centre of the eyes; the frontal band shows several lon-

gitudinal grooves; behind the vertex are usually some long hairs; in most of the species

the scutellum is densely beset with erect bristles; the abdomen is ovate; the legs are

long and slender, the foot-claws and pulvilli elongate in the male; the apical cell is

opened at some distance before the wing’s tip; curvature of the fourth vein more or

less angular, usually without appendage.

To Hystrichodeaia, which has hitherto contained a single representative, H. armata,

HYSTRICHODEXIA. 219

v. Réd., from the Cordilleras of Colombia, may be added the following Central-

American species :—

1. Thoracic dorsum yellowish-cinereous. . . . . . + « « pseudohystricia, Br. & v.B.

Thoracic dorsum blackish, anteriorly with whitish-grey tomen-

tum, or dark cinereous with black stripes. . . . . . 2.

2. Abdomen yellowish-rufous, with black dorsal spots . . . . formidabilis, Big.

’ Abdomen black or piceous, sometimes laterally rufous . . . 3

3. Antenne rufous; third joint nearly as long as the second . . echinata, v.d. Wulp.

_ Antenne black or brown; third joint distinctly longer than

the second. 2 6 ee ee ee ee ee

4, Abdomen laterally rufous ; apical cross-vein deeply concave . contristans, v. d. Wulp.

Abdomen unicolorous black or piceous; apical cross-vein

slightly concave . 2 1 1 ee ee ee ee ee Coraccina, v. d. Wulp.

1. Hystrichodexia pseudohystricia. (Tab. V. figg. 3; 3a, head.)

Hystrisiphona pseudohystricia, Brauer & v. Bergenst. Denkschr. der kais. Akad. der Wissensch.

Wien, lvi. p. 167 (1889) *.

Head pale ochraceous; thorax yellowish-cinereous; scutellum, abdomen, and legs black; antenne and palpi

rufous.

Length 12°5-15 millim.

¢. Front slightly narrowed behind, on the vertex half as broad as the eyes; frontal band blackish; cheeks

bare; beneath the vibrissze several shorter bristles; occiput yellowish-grey ; posterior orbits of the eyes

with long hairs. Antenne rufous; second joint prominent, with two rather long bristles ; third joint

twice as long as the second ; arista brown, thickened at the base. Proboscis distinctly longer than the

head, shining black, its base and the small terminal lips rufous ; palpi filiform, slightly thickened towards

the tip, with some bristly hairs. Thoracic dorsum yellowish-cinereous, with four thin blackish lines,

which are interrupted at the transverse suture ; pleure dark cinereous; scutellum black. Abdomen

shining bluish-black, densely beset with strong macrochete. Front femora with regularly arranged

bristly hairs on the upper- and undersides ; middle femora with similar hairs under the basal portion; hind

femora on the underside with bristles over their whole length; middle and hind tibie outwardly with some

long bristles ; all the tarsi slender, longer than the tibie ; foot-claws and pulvilli elongate and surrounded

with long bristly hairs; the pulvilli yellow. Tegule brown. Wings with a brownish tint, yellowish

and with yellow veins at the base, the rest of the veins obscure; small cross-vein a little before the middle

of the discal cell; fourth vein slightly curved downwards; apical cross-vein a little concave ; posterior

> eross-vein slightly curved.

Hab. Mexico, Xucumanatlan 7000 feet, Omilteme 8000 feet, both in Guerrero

(H. H. Smith).

A male specimen from each locality.

* Brauer and v. Bergenstamm (op. cit. p. 120) include the genus Hystrisiphona, Big.,in their group xxii

(Dexide), but without calling attention to the very long and slender proboscis, which is one of its most striking

characters. Instead of Hystrisiphona migra, Big., the only species hitherto described and probably unknown

to them, they give as the type of the genus a new species from Mexico, Hystrisiphona pseudohystricta ; this

latter has a much shorter proboscis (in addition to other characters), and ‘it must be included in Hystri-

chodexia, v. Réd., a genus which is passed over in silence in their work.

2 f2

220 DIPTERA.

2. Hystrichodexia formidabilis. (Tab. V. figg. 4; 4a, head.)

Rhamphinina formidabilis, Bigot, Aun. Soc. Ent. Fr. 1888, p. 264. no. 58.

Thorax greyish-black, with indistinct stripes; scutellum piceous; abdomen yellowish-rufous, with black

dorsal spots and blackish apex, the dark parts densely beset with strong macrochete ; legs black, the

tibie piceous ; tegule and wings brownish.

Length 16°5 millim.

d. Head cinereous, the oral margin and the inferior part of the cheeks with a brown reflection ; front much

narrowed behind, forming an oblong triangle ; frontal band brownish-black ; cheeks bare, their lower

portion a little shorter than the longitudinal diameter of the eyes; beneath the vibrisse many shorter

bristles along the oral margin; posterior orbits of the eyes with bristly hairs, which become longer

behind the vertex. Antenne short, inserted below a line drawn through the centre of the eyes; basal

joints rufous; second joint prominent, with a rather long and some shorter bristles ; third joint brownish,

scarcely longer than the second; arista thickened to its proximal half. Proboscis a little longer than the

head, shining black, with the terminal lips rufous; palpi rufous, with long hairs towards the tip. Thorax

blackish, anteriorly with some grey tomentum and obsolete black lines; scutellum piceous or even dark

rufous, convex, densely covered with erect hairs, and with several long macrochete on the hind margin.

Abdomen convex, yellowish-rufous, slightly transparent ; black spots are on the first, second, and third

segments and form an interrupted dorsal stripe; the hind border of the third segment at the sides and

the anal segment, except its anterior margin, are brown; the dark portions are densely beset and

surrounded with strong macrochet ; similar macrochete are also on the sides, and there are many on

the anal segment. Legs long and slender, black, the tibia brownish or dark rufous; front femora with

a regular row of long bristly hairs on the upperside and a second row on the underside; middle and

hind femora with bristles on the underside only ; tibiee with some bristles, those on the hind pair (which

are slightly curved) the longest ; foot-claws and pulvilli elongate and yellow, the claws with a black tip.

Tegule and wings brownish ; small cross-vein on the middle of the discal cell; curvature of the fourth

vein somewhat rounded and not far from the wing’s margin; apical cross-vein concave ; posterior cross-

vein curved.

Hab. Mexico (coll. Bigot), Paso del Macho (Hoge) ; Nicaragua, Chontales (Janson).

A somewhat damaged male example from each of these localities.

They fully agree with a better preserved typical specimen (likewise a male), which

M. Bigot has kindly sent me for examination, and from which the description and

figures are made.

Owing to the strong macrochete of the abdomen, the species seems to be best

placed in the genus Hystrichodexia.

3. Hystrichodexia echinata, sp. n., ¢.

Black ; thoracic dorsum anteriorly whitish-grey, with black stripes ; antenne and palpi rufous; curvature of

the fourth vein angular.

Length 12 millim.

Head dark grey, the median portion of the face whitish; front a little broader than the eyes ; frontal band

dark rufous ; cheeks bare, broad, their lower part and the oral margin rufous, the former as long as the

longitudinal diameter of the eyes; oral margin with bristles. Antenne, including the arista, rufous ;

second joint with some short bristles and a longer one; third joint scarcely longer than the second, its tip

not fully reaching half the face; arista rather thick, moderately long-plumose. Proboscis black, a little

longer than the head, the terminal lips distinct and brownish ; palpi rufous, the tip not thicker, with

some long bristly hairs. Thorax and scutellum black; thoracic dorsum anteriorly whitish-grey, with

several rather indistinct black stripes. Abdomen black, densely beset with spinose macrochete. Legs

black, the tibiee with scattered bristles ; foot-claws and pulvilli short. Tegule and wings brownish :

HYSTRICHODEXTA. 221

small cross-vein on the middle of the discal cell ; apical cross-vein slightly concave ; posterior cross-vein

nearly straight.

Hab. Costa Rica, Cache (Rogers).

Two female specimens.

4. Hystrichodexia contristans, sp. n., .

Black ; scutellum and sides of the abdomen rufous; apical cross-vein deeply concave.

Length 10 millim.

Front much narrowed towards the vertex ; frontal band brownish-black, much broader than the nearly linear

- whitish lateral portions; face and cheeks cinereous, with brownish-rufous reflections, the cheeks with

some weak hairs; lower part of the cheeks one fourth shorter than the longitudinal diameter of the eyes ;

above the vibrisse some shorter bristles, and many bristles at the sides of the oral margin and along the

lower portion of the head ; posterior orbits of the eyes with a row of long hairs, which are more dense

behind the ocellar bristles. Antenne half as long as the face, black, the second joint and the base of the

third showing a tendency to become rufous; the second joint with short bristly hairs and two longer

bristles ; the third joint one and a half times as long as the second ; arista thickened at the base. Pro-

boscis shining black, a little longer than the head; palpi brown. Thorax shining black, on the shoulders

and the anterior margin with some whitish tomentum ; scutellum brownish-rufous, densely clothed with

erect pile. Abdomen densely haired, black, laterally over its whole length rufous. Legs black ; front

femora with regularly arranged long hairs on the upper- and undersides; middle and hind femora with

long bristles on the underside; all the tibiee outwardly with several bristles; foot-claws and pulvilli

elongate, the pulvilli fuscous. Tegule dark brown. Wings grey, the base, including the two lower

basal cells, fuscous ; small cross-vein infuscated, on the middle of the discal cell; curvature of the fourth

vein somewhat rounded and near to the wing’s margin; apical cross-vein deeply concave ; posterior cross-

vein slightly curved. .

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single male specimen.

5. Hystrichodexia coracina, sp. n., 3 9.

Black ; thorax anteriorly greyish, with indistinct stripes; abdomen black or piceous; antennz brown, the

third joint twice as long as the second.

Length 9°5-12 millim.

Head grey, with black reflections; front of the male narrowed behind, on the vertex half as broad as the eyes,

that of the female broader than the eyes; frontal band blackish ; cheeks without any pile, their lower

portion equalling two-thirds the longitudinal diameter of the eyes ; laterally of the oral margin and along

the lower part of the head are many bristles. Antenne inserted below a line drawn through the centre

of the eyes, descending to half the face, blackish-brown, the basal joints showing a tendency to become

rufous; second joint somewhat prominent, with short hairs and a longer bristle ; third joint twice as long as

the second ; arista thickened in its proximal half, the plumosity shorter than in the preceding species, absent

at the base, but continued to the extreme tip. Proboscis one and a half times as long as the head, black,

brownish at the base and on the terminal lips; palpi filiform, black with a rufous tip, or almost wholly

rufous. Thorax black, anteriorly with a whitish-grey tomentum and obsolete black stripes; scutellum

piceous or dark rufous, densely beset with erect hairs. Abdomen broadly ovate, black or piceous, densely

beset with black hairs and macrochete. Legs black, the tibie piceous; the front femora on the upper-

and undersides, and the middle and hind femora on the underside, with many bristles ; tibize with scattered

bristles ; foot-claws and pulvilli elongate in the male, the pulvilli pale yellow. Tegule blackish. Wings

with a brownish-grey tint, slightly infuscated at the base ; small cross-vein on the middle of the discal

222 DIPTERA.

cell; curvature of the fourth vein angular, in some specimens with a small appendage ; apical cross-vein

concave ; posterior cross-vein slightly curved.

Hab. Mexico, Amula 6000 feet, Omilteme 8000 feet, and Sierra de las Aguas Escon-

didas 9500 feet, all in Guerrero (H. H. Smith).

Several specimens of both sexes.

BATHYDEXIA, gen. nov.*

Front narrowed behind in the male, broad in the female; face perpendicular, scarcely carinated in the middle ;

oral margin slightly prominent; frontal band with several longitudinal grooves; cheeks bare, moderately

broad, their lower portion no more than half the longitudinal diameter of the eyes; vibrissal swellings

nearly parallel ; vibrissee inserted just at the oral margin; eyes bare. Antenne inserted on or below a

line drawn through the centre of the eyes; third joint elongate, at least three times as long as the second,

which is very bristly ; arista plumose. Proboscis as long as, or a little longer than, the head ; palpi

cylindrical. Abdomen broadly ovate, more or less densely beset with macrochete. Legs long and

slender ; foot-claws and pulvilli elongate in the male. Apical cell opened at some distance before the

wing's tip; curvature of the fourth vein angular and with a short appendage.

This genus is nearly allied to Hystrichodexia, but differs from it by the vibrisse

inserted at the oral margin, the longer antenne, the more angular and shortly appendi-

culated curvature of the fourth vein, and the less developed facial carina.

1. Bathydexia appendiculata.

Phorostoma appendiculata, Bigot, Ann. Soc. Ent. Fr. 1888, p. 269. no. 82 (?).

Black ; thoracic dorsum somewhat greyish, with indistinct black stripes ; antenne black or brown, the third

joint three or four times as long as the second.

Length 15 millim.

Head whitish-grey ; front of the male narrowed behind, that of the female broader than the eyes; frontal

band blackish, in the female broader than the lateral portions. Antenne shorter than the face; third

joint narrow, three or four times as long as the second ; arista brownish-rufous, thickened at the base,

densely plumose. Proboscis brown, a little longer than the head, with well-developed terminal lips ;

palpi dark rufous, scarcely thicker towards the tip. Thorax black; thoracic dorsum with some grey

tomentum and obsolete black stripes; scutellum piceous. Abdomen broadly ovate, convex, piceous, in

the male densely beset with strong, nearly spinose, macrochete, in the female with long marginal macro-

cheete. Legs black ; tibia with scattered bristles; foot-claws and pulvilli elongate in the male, the claws

black, the pulvilli yellowish. Tegule dark brown. Wings brownish; small cross-vein on the middle of

the discal cell ; apical cross-vein concave ; posterior cross-vein slightly curved.

Hab. Muxico, Oaxaca (coll. Bigot); Guaremaua, San Gerénimo (Champion).

Two male specimens from Guatemala; a female from Mexico in the collection of

‘M. Bigot. The identification of the latter is founded on the examination of atypical

example, which is by no means a Phorostoma, the hind tibiz not being ciliated.

* Badds (broad), Dewia.

BATHYDEXIA.—SCOTIPTERA. | 223

2. Bathydexia albolineata, sp.n., 3g. ~

Blackish ; thoracic dorsum anteriorly with white and black stripes; abdomen shining, rufous-brown ; tarsi on

the inner side with golden-yellow tomentum ; foot-claws yellow, with black tips.

Length 12°5 millim.

Front blackish, on the vertex half as broad as the eyes; frontal band broad, nearly concolorous with the

lateral portions; face and cheeks dark grey, the oral margin and the lower part of the cheeks somewhat

brownish-rufous. Antenne brown, inserted below a line drawn through the centre of the eyes ; third joint

three times as long as the second; arista long, brownish, finely plumose. Proboscis black, as long as the

head ; palpi rufous,with black hairs towards the tip. Thorax black, before the transverse suture with white

tomentum and five black stripes—-the two median stripes linear, the others broader than the interspaces, in

such a manner that the thorax shows four or six white stripes ; scutellum black. Abdomen convex, densely

covered with black hairs and with macrochete on the hind margins of the second and following segments.

Legs black ; tibie with scattered bristles; middle and hind tarsi on the inner side with a golden-yellow

tomentum ; foot-claws and pulvilli elongate, yellow, the claws with a black tip. Tegule blackish-brown.

Wings brownish ; small cross-vein on the middle of the discal cell; apical cross-vein concave; posterior

cross-vein straight. .

Hab. Costa Rica, Rio Sucio (Rogers).

Two male specimens.

SCOTIPTERA.

Scotiptera, Macquart, Dipt. Exot. ii. 3, p. 83 (1843).

? Sophia, Robineau-Desvoidy, Essai sur les Myodaires, p. 317, pro parte.

Head hemispherical ; front of the male narrowed behind, but on the vertex nearly half as broad as the eyes,

that of the female broader than the eyes ; face perpendicular, slightly carinated ; oral margin not promi-

nent; cheeks broad, their lower portion half as broad as the longitudinal diameter of the eyes ; vibrissal

swellings nearly parallel, only on their lowest part slightly convergent ; vibrisse inserted at a short dis-

tance above the oral margin. Eyes bare. Antenne inserted below a line drawn through the centre of the

eyes, a little shorter than the face; third joint slender, four times as long as the second; arista thickly

plumose. Proboscis longer than the head, with distinct terminal lips; palpi cylindrical. Abdomen ovate,

as broad as, or a little broader than, the thorax, with discal and marginal macrochete. Legs slender,

with short and weak bristles; foot-claws and pulvilli elongate in the male. Wings longer than the

abdomen ; apical cell opened at a short distance before the wing’s tip ; curvature of the fourth vein angular,

with a short appendage ; posterior cross-vein beyond the middle between the small cross-vein and the

curvature of the fourth vein.

Macquart established Scotiptera for Dexia melaleuca, Wiedem. ; he considered the

genus Sophia, Rob.-Desv., as synonymical with it, and Sophia punctata, Rob.-Desv.,

though with some doubt, as conspecific with Dexia melaleuca. Robineau-Desvoidy

gives among the characters of his genus Sophia, that the abdomen inclines to become

elongate and that the legs are very long ; according to Macquart, the abdomen should

even be cylindrical. The abdomen of Dexia melaleuca, however, is ovate (though much

narrower than in Rutilia, the genus which in Macquart’s work immediately precedes

Scotiptera); as to the legs, they are elongate and slender, though not so strikingly

long as in some other genera of Dexine. Robineau-Desvoidy seems to have included

in his genus Sophia some very heterogeneous species (see the author’s observation at

224 DIPTERA.

the end of the genus), and among them one, Sophia jilipes, with very long legs, which

may have induced him to indicate this as one of the generic characters.

Besides Dexia melaleuca, Wiedem., which must be considered as the type of the genus

Scotiptera, I have found in the Central-American collections an example of still another

species, which fully agrees with it in the above-mentioned generic characters.

1. Scotiptera melaleuca. (Tab. V. figg. 5; 5a, head.)

Dexia melaleuca, Wiedem. Aussereur. zweifl. Ins. ii. p. 369. no. 2; Perty, Del. Anim. Art. Bras.

p. 186, t. 37. fig. 7.

Scotiptera melaleuca, Macquart, Dipt. Exot. ii. 3, p. 83, t. 9. fig. 1.

? Sophia punctata, Rob.-Desv. Essai sur les Myodaires, p. 318. no. 2.

Black; thorax with four white stripes; abdomen with sharply limited whitish spots; wings uniformly

black.

Length 11-13°5 millim.

Head white, with blackish reflections ; frontal band velvety black, immediately before the root of the antenne

a very shining spot. Antenna, proboscis, and palpi black; second antennal joint with a long and some

shorter bristles. Thoracic dorsum with four narrow silvery-white stripes, the two lateral ones being

interrupted (in the form of small irregular spots) before the transverse suture; pleure with .whitish

reflections ; scutellum piceous. Abdomen black, with whitish markings, ovate, a little broader than the

thorax, very similar in both sexes, only somewhat shorter in the female; the light markings have a

yellowish tint and consist of a narrow front margin to the second segment, two semicircular spots on the

third segment, and two similar, though smaller, spots on the anal segment, these latter spots sometimes

absent ; ventral surface with two silvery-white trigonal spots on each of the first three segments. Legs

black ; pulvilli yellowish-grey. Tegule brown. Wings intense blackish-brown; small cross-vein before

the middle of the discal cell; apical cross-vein slightly concave; posterior cross-vein distinctly curved.

Hab. Guatemata, San Gerdnimo (Champion) ; Panama, Bugaba, Volcan de Chiriqui

(Champion).—Braziu (Wiedemann).

One female and three male specimens.

2. Scotiptera varipennis, sp. n., °.

Thorax grey, with four black stripes ; abdomen black, the front borders of the second and third segments

rufous with white reflections; antenne, palpi, and legs black ; wings with a dark brown shadow in the

middle and on the costa.

Length 12 millim.

Head silvery-white ; frontal band velvety black, with a shining spot before the root of the antenne. Antenne,

proboscis, and palpi black ; second antennal joint with a long and some short bristles ; the palpi slightly

thickened towards the tip, which has a whitish tomentum. Thoracic dorsum with four black stripes,

the outer stripes broader and interrupted at the transverse suture; scutellum somewhat rufous. Abdo-

men elongate-oval, not broader than the thorax, black, the second and third segments with dark rufous

front borders, which in the middle are interrupted and laterally varied by whitish reflections. Legs

black, slender, with scattered, rather weak bristles; foot-claws and pulvilli short. Tegule yellowish-

white. Wings brownish-grey, more intensely so along the veins; a dark brown shadow covers the upper

basal cell and the region below the mediastinal cell, and extends from there along the costa ; venation as

in S. melaleuca, the appendage on the fourth vein a little longer.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

RHYNCHODEXIA. 995

RHYNCHODEXIA.

Rhynchiodexia, Bigot, Bull. Soc. Ent. Fr. 1885, p. xi.

Rhamphinina, Bigot, loc. cit.

Head hemispherical; front somewhat prominent, very much narrowed i in the male ; face perpendicular, usually

distinctly, but not sharply, carinated in the middle; vibrissal swellings parallel or nearly parallel, only in

some species slightly convergent ; vibrisss inserted at some distance above the oral margin, which is

rounded, slightly prominent, and laterally beset with a row of bristles; cheeks broad, their lower

portion more than half as long as the longitudinal diameter of the eyes; occiput somewhat swollen on

the lower part. Eyes bare. Antenne short, inserted below a line drawn through the centre of the eyes ;

arista distinctly pilose. Proboscis exserted, as long as, or a little longer than, the head; palpi cylindrical,

scarcely thicker towards the tip. Abdomen conical or elongate-oval, with discal and marginal macro-

chete. Legs long and slender, with scattered bristles ; foot-claws and pulvilli elongate in the male.

Wings longer than the abdomen; apical cell opened at some distance before the wing’s tip; curvature of

the fourth vein more or less angular, without appendage; posterior cross-vein inserted beyond the middle

between the small cross-vein and the curvature of the fourth vein.

From Hystrichodexia and Bathydexia this genus may be distinguished by the more

elongate shape of the body and by the less numerous and more regularly arranged

macrochete on the abdomen; from Bathydexia, moreover, by the vibrissee inserted at

some distance above the oral margin, and by the absence of an appendage at the

curvature of the fourth vein. In this latter negative character and by the proportion-

ately shorter antenne, Rhynchodexia differs from Scotiptera.

The genus Rhynchiodexia (Rhynchodexia i is grammatically more correct) was founded

by Bigot for a species from New Caledonia, and characterized in a very incomplete

manner as having the proboscis exserted, thin, aud rigid, but shorter than in. Prosena.

At the same time he established two other Dexid genera with elongate proboscis:

Rhamphinina and Siphoniomyia, each with one Mexican species (Rhamphinina dubia

and Stphoniomyia melas). Of the last-mentioned I have examined the typical specimen,

and it proves to be not a Dexid at all, but a Tachinid of the genus Trichophora in the

sense adopted by me, anted, Pp. 30. The genus Siphoniomyia, Big., may thus be passed

over in silence. ©

In the ‘Revue d’Entomologie.’ 1885, pp. 259 et seq., Bigot has given a synoptical

table of the genera of Dexine. According to this table, Rhynchodexia and Rhamphi-

nina should be distinguished from each other by the facial carina being present in the

former and absent in the latter. This character, however, is insufficient to separate

the two genera, because the species belonging to them show numerous transitions with

regard to it, and even Bigot himself has not been consistent in its application: For

instance, his Rhamphinina formidabilis (which I include in the genus Hystrichodexia)

and Lhamphinina anthracina have a very distinct facial carina, whilst, on the contrary,

it is inconspicuous in his Rhynchodexia tincticornis, as I have seen in the typical

examples of these species kindly sent me by M. Bigot for examination. ‘These facts

justify me in uniting the two genera. ;

In the genus Ahynchodexia I include an extensive series of Central-American species.

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1891. 29

226 DIPTERA.

Many of them offer great difficulties, if we endeavour to find suitable characters to

distinguish them from each other. The following synoptical table must therefore be

considered merely as an essay, as some of the enumerated species may perhaps prove

to be no more than varieties :— oe

1. Abdomen rufous, with a black dorsal band, or at least laterally

with a well-pronounced rufous coloration . . . . 2.

Abdomen without distinct rufous coloration at the sides 9.

2. Legs rufous or with distinct rufous portions . 3.

Legs black, the tibie at most slightly rufous . oe ew A,

3. Antenne wholly rufous. . . rutilans, v. d. Wulp. .

Antenne with the third joint at the tip, or even n for the greater

part, brown or black . . . . . . . + «discolor, v. d. Wulp.

4, Wings yellowish, with a rufous venation . . . . . . . tincticornis, Big.

Wings grey, with the veins brown or black . . . . . . 5.

5. Cheeks hairy. . . 2. 2. 1 ee ee ee ee ee 6

Cheeks bare. . . . . oe ro

6. Hind tibiz slightly curved ; smnaller species ‘(0 millim. or

less) . . . . . » oe ee 6conjuncta,v.d. Wulp. — ,

Hind tibiz straight ; larger species s (12° 5 milli. . . . « simulans, v. d. Wulp.

7. Scutellum grey . . 2. 1. 2... we ee ee ee frat erna, v. d. Wulp.

Scutellum rufous. . . . 2... . ww ee eee 8

8. Pulvilli yellow .

scutellata, v. d. Wulp.

Pulvilli dark grey .

rubricornis, v. d. Wulp.

9. Anus rufous rufianalis, v. d. Wulp.

Anus notrufous . . ... 0... we eee CS

10. Legsrufous. . . . ...... eee OL

Legs black . 2. 2. 2... ww we eee ee ee

11. Coxe black .

. oe ew ew ee) 6Varipes, v. d. Wulp.

Coxe rufous .. . . rs 02

12. Ground-colour of the thorax and abdomen grey .

Ground-colour of the thorax and abdomen cinereous

13. Base of the wings and small cross-vein infuscated

strigilata, v. d. Wulp.

macroptera, v. d. Wulp.

punctipennis, v. d. Wulp.

Base of the wings and small cross-vein not infuscated . . . 14.

14. Curvature of the fourth vein angular woe es .) angulata, v. d. Wulp.

Curvature of the fourth vein rounded . . ..... 15.

15. The black thoracic stripes very distinct; base of the wings

yellow . . oe oo ~ . . « . striata, v. d. Wulp.

The black thoracic stripes less distinct ; base of the wings not

yellow. . 2. 2. 2... ee ee we ee Od

16. Abdomen unicolorous black or piceous . anthracina, Big.

Abdomen with cinereous and blackish reflecting spots - . . L%.

17. Front prominent, flattened .

. planifrons, v. d. Wulp.

Front less prominent and slightly convex

eo ee ew ee 18,

RHYNCHODEXIA. 227

_ 18. Palpi black ; wings distinctly infuscated at the base and

costa... ee ee ek ee we ee ee preusta, v. A. Walp.

Palpi rufous; wings unicolorous. . . . ...... 219.

19. Thoracic dorsum cinereous, with the black stripes conspicu-

ous over its whole length; larger species (more than 8°5

millim.) . . . 2 1... we ee ee es Omisga, v. A. Wulp.

Thoracic dorsum blackish, the black stripes more obsolete ;

smaller species (less than 85 millim.) . . . . . . . émétatrix, v. d. Wulp.

1. Rhynchodexia rutilans, sp.n., ¢ ¢.

Thorax grey, with black stripes; abdomen yellowish-rufous, with a black dorsal band and whitish reflecting

spots ; antenne, palpi, and legs rufous, the tarsi black.

Length 10-5 millim.

‘Head yellowish-grey ; front of the male much narrowed behind, the eyes being nearly contiguous on the

. vertex, the frontal band rufous, trigonal; in the female the front is broad, slightly narrowed towards

the vertex, the frontal band dark rufous, as broad as the lateral portions ; cheeks with pale rufous

reflections ; vibrissal swellings parallel ; oral margin elevated and prominent. Antenne rufous; second

joint prominent, with a rather long bristle; third joint two and a half times as long as the second;

arista brown, thickened at the base. Proboscis a little longer than the head, black, with the terminal

lips rufous; palpi rufous, slender. Thoracic dorsum grey, with three black lines, close together, before

the transverse suture, and two broader lateral black stripes, which are prolonged behind the suture;

pleure cinereous; scutellum rufous, but covered by a grey tomentum. Abdomen yellowish-rufous, in

the male conical and transparent, in the female ovate, nearly opaque ; each segment with a large black

spot, forming together a dorsal band, and with whitish reflecting spots, which in the male are more con-

fined to the sides, in the female more spread over the whole surface; second and following segments

with discal and marginal macrochete. Legs, including the coxe, rufous, the tibiae somewhat more

obscure, the tarsi black; middle and hind tibie with several long bristles; foot-claws and pulvilli elon-

gate in the male, the pulvilli yellowish. Tegule yellow. Wings greyish ; smal] cross-vein on the

middle of the discal cell ; curvature of the fourth vein at a little distance from the wing’s margin; apical

cell concave ; posterior cross-vein curved.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

Four male and six female specimens.

dae

2. Rhynchodexia discolor, sp. n., 3 9.

Thorax grey, with black stripes; abdomen rufous, with a black dorsal band and yellowish reflecting spots ;

third antennal joint infuscated, the basal joints rufous; palpi rufous; legs brownish-rufous, the tarsi

black.

Length 8-11°5 millim.

Allied to R. rutilans, but of a darker coloration. The antenne shorter, their third joint in most of the

specimens black or brownish-black, one and a half times as long as the second; the frontal band usually

black in the male; the palpi of the female slightly thickened towards the tip; the vibrissal swellings

convergent, the oral margin less prominent; the ground-colour of the thoracic dorsum more obscure and

the black stripes therefore less distinct ; the scutellum brownish-rufous, with scarcely any grey tomentum ;

the abdomen darker rufous and less transparent, in the male more densely beset. with macrochete ; the

legs browner, the coxe black with grey tomentum, the femora in some specimens nearly black and only

rufous towards the tip, the pulvilli grey; the wings somewhat brownish, the curvature of the fourth

vein at a greater distance from the wing’s margin.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer), La Venta 300 feet, Amula

:’ og.”

228 DIPTERA.

6000 feet, Xucumanatlan 7000 feet, and Omilteme 8000 feet, all in Guerrero: (H. H.

Smith), Atoyac in Vera Cruz (Schumann). Bo

Several specimens of both sexes.

3. Rhynchodexia tincticornis, ¢ 2. 7 ;

Rhynchiodexia tincticornis, Bigot, Ann. Soc. Ent. Fr, 1888, p. 266. no. 64.

Head, thorax, and scutellum cinereous ; abdomen rufous, with a black dorsal band and whitish reflecting

spots ; antenne rufous ; legs black ; wings yellowish.

Length 13 millim.

Head cinereous, the front and the upper part of the cheeks with whitish, the inferior part of the cheeks with

pale rufous, reflections ; front of the male narrowed behind, though separating the eyes on the vertex,

that of the female broader than the eyes; frontal band rufous; external to the frontal bristles and on

the cheeks some weak hairs; vibrissal swellings nearly parallel; oral margin scarcely prominent.

Antenne rufous; second joint prominent, with long bristly hairs ; third joint two and a half times as

long as the second, and showing a tendency to become brown towards the tip; arista rufous, thickened at

the base and long-plumose. Proboscis a little longer than the head, shining black, the terminal lips

somewhat rufous ; palpi rufous, cylindrical, slightly thickened towards the tip, especially in the female.

Thorax and scutellum greyish-cinereous; thoracic dorsum with obsolete blackish stripes. Abdomen of

the male conical, rufous, transparent, with white reflecting spots and a broad black dorsal band, the anal

segment almost wholly black, the ventral surface rufous with a blackish median stripe ;—of the female

ovate, pointed towards the anus, coloured as in the male, but not transparent; in both sexes there are

many strong discal and marginal macrochete. Legs black, the tip of the coxee and also the tibie

slightly rufous; femora with regularly arranged bristles ; front tibie with short, the middle and hind

tibiee with longer, bristles ; foot-claws and pulvilli elongate in the male, the pulvilli yellowish. Tegule

yellowish-white. Wings with a yellow tint and rufous venation ; small cross-vein on the middle of the

discal cell ; curvature of the fourth vein somewhat rounded ; apical cross-vein undulate; posterior cross-

vein curved ; the fifth vein not fully reaching the wing’s margin.

Hab. Mxxico (coll. Bigot), Paso del Macho (Hége); Costa Rica (Van Patten).

A male specimen from Paso del Macho, a female from Costa Rica; the male agrees

with a typical example from M. Bigot’s collection, only it is somewhat larger in size.

4. Rhynchodexia conjuncta, sp.n., ¢.

Blackish; cheeks, basal joints of the antenne, palpi, and sides of the abdomen rufous, the abdomen with

whitish reflecting spots; hind tibie slightly curved.

Length 7°5-10 millim.

Front slightly prominent and convex, much narrowed behind (the eyes scarcely separated on the vertex), grey;

with blackish reflections; frontal band brown; face slightly concave; cheeks and oral margin with

rufous reflections ; the cheeks beset with fine hairs; vibrissal swellings parallel. Antenne short; the

two basal joints and the basal half of the third rufous, the apical half of the latter black ; second joint

prominent and with some long bristles; third joint one and a half times as long as the second; arista

black, thickened at the base, finely plumose. Proboscis shining black, a little longer than the head;

palpi rufous, slender. Thorax blackish; thoracic dorsum with scarcely any grey tomentum, and incon-

spicuous black stripes; scutellum piceous. Abdomen elongate-oval, rufous, with a broad black dorsal

band and whitish reflecting spots, which are spread not only over the black, but over the rufous colour, and

give the appearance of irregular black spots on the dorsal band; many discal and marginal macrochete ;

ventral surface testaceous, with the incisions and a median line blackish, and with a whitish tomentum.

Legs black, slender, with scattered bristles; hind tibis dark rufous, slightly curved ; all the tarsi longer

than the tibie ; foot-claws and pulvilli elongate, the pulvilli yellowish-grey, rather obscure. Tegule

RHYNCHODEXIA. 229

yellowish-white. Wings grey, with black venation; small cross-vein on the middle of the discal cell ;

apical cross-vein slightly concave; posterior cross-vein curved.

_ Hab. Mexico, Ciudad in Durango 8100 feet (Forrer), Xucumanatlan in Guerrero

7000 feet (H. H. Smith).

Two male specimens.

5. Rhynchodexia simulans, sp. n., c.

Blackish; basal joints of the antenne, palpi, scutellum, and sides of the abdomen rufous, the abdomen with

whitish reflecting spots ; hind tibiee straight.

Length 12°5 millim.

Agrees with R. conjuncta, and only differs from it by its larger size, the rufous scutellum, a more conical

abdomen, the straight hind tibia, and the curvature of the fourth vein more sharply angular.

Hab. Mexico, Northern Sonora (Morrison).

Two male specimens.

6. Rhynchodexia fraterna, sp.n., ¢ 2.

‘Thorax and scutellum cinereous, the thorax with black stripes ; abdomen rufous, with a black dorsal band (¢ )

or testaceous (@), in both sexes with whitish reflecting spots; antenne and palpi rufous, the third

antennal joint brown ; legs black.

Length 9-14°5 millim.

Head yellowish-grey ; front convex, in the male much narrowed behind, in the female broader than the eyes ;

frontal band blackish; cheeks bare, almost without rufous reflections ; occiput grey: vibrissal swellings

parallel. Antenne short, rufous; second joint prominent, with long bristles ; third joint twice as long

as the second, usually brown towards the tip; arista thickened at the base, long-plumose. Proboscis

shining black, with rufous terminal lips; palpi rufous, cylindrical, slender, in the female slightly

thickened towards the tip. Thorax cinereous, with three distinct black longitudinal stripes, and on each

side of the median stripe a narrow black line; scutellum cinereous. Abdomen of the male conical,

rufous, with a broad black dorsal band, whitish reflecting spots, and many discal and marginal macro-

cheete ; in the female ovate, testaceous, though darker in the dorsal region, and likewise with whitish

reflecting spots, the discal and marginal macrochete present, but less numerous than in the male. Legs

black; front femora on the upper- and undersides with regularly arranged bristles; middle and hind

femora on the underside only with bristles on the proximal half, and towards the tip with obliquely

arranged long hairs; front tibie with short, the middle and hind tibie with some longer bristles ; foot-

claws and pulvilli elongate in the male, the pulvilli yellowish-grey. Tegule yellowish. Wings grey, at

the base and costa with a dilute brownish-yellow tint; small cross-vein on the middle of the discal

cell; curvature of the fourth vein usually somewhat rounded; apical and posterior cross-veins slightly

curved.

Hab. Muxico, Tepic, Santiago de Iscuintla (Schumann), Orizaba (Ff. D. G. and H.

H. Smith), Acapulco, Tierra Colorada, Rincon, Venta de Zopilote, Chilpancingo, and

“Amula, all in Guerrero, 2000 to 6000 feet, Cuernavaca in Morelos, Atoyac in Vera

Cruz, Teapa in Tabasco (H. H. Smith).

Several specimens of both sexes. They vary much in size and in the extension of

the white reflections on the abdomen; in some of them these reflections are so much

enlarged that the abdomen seems to be covered by a whitish tomentum. ‘Three of the

largest specimens (males) agree fully with a typical example of Rhamphinina major,

230 ' DIPTERA.

Big. (Ann. Soc. Ent. Fr. 1888, p. 265. no. 59); only the scutellum does not appear

to be rufous, but cinereous (this may, however, be explained by the less fresh -con-

dition of M. Bigot’s specimen), the ground-colour being indeed rufous, but thickly

covered by a cinereous tomentum. Bigot gives as localities for R. major Mexico and

Washington Territory.

‘The females generally are smaller in size, the largest being no more than 11 millim.

In some of them the wings are rather darker in tint, and such specimens bear a striking

resemblance to the typical example of Dexiosoma fumipennis, Big. (1. c. p. 270. no. 84),

which, however, is by no means a Dexiosoma.

7. Rhynchodexia scutellata. sp.n., s 2.

Thorax blackish ; abdomen rufous, with a black dorsal band; antenne, palpi, scutellum, and tibie rufous ;

pulvilli pale yellow.

Length 10°5-12 millim.

Head whitish; cheeks and oral margin with rufous reflections, the cheeks bare; front somewhat prominent

and flattened, in the male much narrowed behind, in the female broader than the eyes; frontal band

brownish-black, immediately before the root of the antenne rufous; face slightly inclined, in the middle

distinctly carinated; vibrissal swellings curved inwards; oral margin not prominent. Antenne rufous;

second joint with some long bristles; third joint slender, fully twice as long as the second, infuscated

towards the tip; arista thickened at the base, moderately long-plumose. Proboscis as long as the

head, brown, with the terminal lips rufous; palpi rufous, cylindrical, long-haired. Thorax black; in

the male the shoulders and two small spots on the front margin whitish; in the female the thoracic

dorsum, before the transverse suture, cinereous, with three black stripes; scutellum rufous. Abdomen

of the male conical, yellowish-rufous, transparent, with a well-defined black dorsal band and some

white reflections on the sides; seen laterally the anal segment is truncate; many discal and marginal

macrochete are present;—in the female the abdomen is ovate, less transparent, the black dorsal

band not so sharply delineated, the anus pointed, and the macrochzte less numerous. Legs black;

tibie dark rufous; femora with regularly arranged bristles; middle and hind tibie with some scattered

bristles ; foot-claws and pulvilli elongate in the male, the pulvilli pale yellow. Tegule whitish, with a

yellow margin. Wings greyish; small cross-vein on or a little before the middle of the discal cell ;

apical cross-vein slightly concave ; posterior cross-vein curved.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer).

Two male and two female specimens.

8. Rhynchodexia rubricornis, sp. n., ¢ ¢.

Thorax black, anteriorly grey with black stripes; abdomen rufous, with a black dorsal band; antenne and

palpi rufous, the antenne black towards the tip; legs black; pulvilli grey.

Length 11 millim.

Nearly allied to R, scutellata and agreeing with it, except in the following respects:—The front is a little

more concave ; the antenne are shorter, the third joint broader, black on the apical two-thirds; the

arista has longer hairs ; the vibrissal swellings are parallel ; the thoracic dorsum is, in both sexes, before

the transverse suture covered by a grey tomentum, in which threo median and two lateral black stripes

are conspicuous, the median stripes linear and close together; the rufous portions of the abdomen are

scarcely transparent and the limits of the black dorsal band obsolete, even in the male; the pulvilli are

dark grey.

Hab. Mexico, Northern Sonora (JJorrison), La Venta 300 feet, Amula 6000 feet,

RHYNCHODEXIA. 231

Xucumanatlan 7000 feet, Omilteme 8000 feet, Sierra de las Aguas Escondidas 9500

feet, all in Guerrero, Teapa in Tabasco (H. H. Smith), Atoyac in Vera Cruz (Schu-

mann).

A large series of specimens, mostly males.

9. Rhynchodexia rufianalis, sp.n., ¢ @.

Cinereous ; thoracic dorsum with black stripes; abdomen with black reflecting spots; anus, basal joints of

the antennee, palpi, and, in the female, the femora and tibie, rufous ; the legs black in the male.

Length 7:5-10 millim.

Head grey ; front of the male much narrowed behind, that of the female broader than the eyes; frontal band

brown, with grey reflections, and with longitudinal grooves; cheeks and oral margin with rufous reflec-

tions ; vibrissal swellings parallel. Antenne with the first two joints and the base of the third rufous,

the latter for the rest black; second joint prominent; third joint twice as long as the second; arista

black, thickened on its proximal half. Proboscis a little longer than the head, shining black, with the

terminal lips usually rufous; palpi rufous, in the female slightly thickened towards the tip. Thorax,

scutellum, and abdomen cinereous; thoracic dorsum with irregular black stripes; scutellum with black

reflections. Abdomen conical (3) or ovate (9), with black reflecting spots, especially on the hind

margins of the first three segments ; anus rufous; second and following segments with discal and marginal

macrochete. Legs of the male black, the hind tibie scarcely with a rufous tip, those of the female,

including the coxee or at least their tips, rufous, the tibiae more obscure, the tarsi black; front femora on

the upper- and undersides, the middle and hind femora on the underside, and all the tibie outwardly

with rather long bristles ; foot-claws and pulvilli elongate in the male, the pulvilli blackish. Tegule

yellowish-white. Wings greyish; small cross-vein on or a little before the middle of the discal cell ;

apical cross-vein concave ; posterior cross-vein curved.

Hab. Mexico, Chilpancingo 4600 feet, Amula 6000 feet, both in Guerrero (H. H.

Smith), Santiago de Iscuintla in Jalisco (H. H. Smith), Northern Yucatan (Gaumer).

10. Rhynchodexia varipes, sp. n., ¢ @.

Obscure cinereous ; thoracic dorsum with black stripes; abdomen with black reflecting spots; basal joints of

the antenn, palpi, and legs rufous, in the male the femora and tibie partly, in both sexes the coxe and

tarsi, black.

Length 7-9°5 millim.

Head grey, with blackish reflections; front in the male much narrowed behind, in the female broader than

the eyes; frontal band scarcely differing in coloration from the lateral portions, with longitudinal grooves ;

cheeks with brownish-rufous reflections ; vibrissal swellings slightly convergent. Antenne more elongate

than in the preceding species ; the two basal joints and the base of the third rufous; second joint pro-

minent, with some bristly hairs ; third joint two and a half times as long as the second; arista browns

thickened at the base. Proboscis as long as the head (¢') or a little longer ( 2 ), shining black, with the

terminal lips rufous; palpi rufous, slender, with rather long bristly hairs. Thorax dark grey; thoracic

dorsum with four black stripes—the two median linear and only distinct before the transverse suture, the

outer stripes broader and interrupted at the suture ; sometimes between the two median lines a less

distinct brown line; scutellum blackish-grey. Abdomen conical (¢) or ovate (2), grey, with black

reflecting spots, which in the female are so much extended that there remain only narrow front margins

to the segments of the grey ground-colour; anus without any rufous coloration ; in the male many discal

and marginal macrochete; in the female the second segment with some marginal, the third and anal

segments with discal and marginal macrochete. Legs slender, rufous; the coxe black, with grey

tomentum ; the tarsi black ; in the male the front femora are black, except on the underside and at the

tip, and the middle and hind femora and tibie have a blackish base and tip; in the female all the femora

and tibiee are rufous, or at least the blackish parts, which in the male are very conspicuous, are less

extended and more obsolete; in both sexes the femora and tibise are beset with several rather long

232 DIPTERA.

bristles ; foot-claws and pulvilli elongate in the male, the pulvilli yellowish-grey. Tegule yellowish.

Wings brownish-grey ; small cross-vein on the middle of the discal cell; curvature of the fourth vein

somewhat rounded; apical cross-vein concave ; posterior cross-vein curved.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

Five specimens (four males, one female).

11. Rhynchodexia strigilata, sp.n., 2.

Grey ; thoracic dorsum with five black stripes ; scutellum greyish-rufous ; abdomen with blackish reflections ;

basal joints of the antenne, palpi, and legs, including the coxe, rufous ; tarsi black.

Length 12 millim.

Head sericeous-white, with dark grey, and on the lower portions brownish-rufous, reflections ; front as broad

as the eyes; frontal band dark brown; vibrissal swellings slightly convergent. Antenne with the first

two joints and the base of the third rufous, the latter for the rest brownish-black ; second joint with some

bristles ; third joint twice as long as the second ; arista densely but not long-plumose. Proboscis black ;

palpi rufous, slender. Thorax grey, before the transverse suture with five black stripes—the three median

linear and close together, convergent towards the head, the two lateral stripes broader and prolonged

behind the suture; scutellum rufous, but covered with a whitish-grey tomentum. Abdomen elongate-

oval, pointed towards the apex, grey, with irregular and ill-defined blackish-brown reflections ; second and

third segments with a pair of discal macrochete, which, however, are shorter than those on the hind

margins ; anal segment with several macrochete. Legs, including the coxe, rufous, the coxe and the

underside of the femora with whitish reflections; tarsi black; tibia with scattered bristles. Tegule

whitish, with a yellow margin. Wings grey, the base yellowish ; small cross-vein on the middle of the

discal cell; apical and posterior cross-veins curved.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer).

A single female specimen.

12. Rhynchodexia macroptera, sp. n., 2.

Cinereous; thoracic dorsum with black stripes ; scutellum greyish-rufous ; abdomen with blackish reflecting

spots; base of the antenne, palpi, and legs (including the cox) rufous ; tarsi black.

Length 8-9 millim.

Head light grey; oral margin and lower portion of the cheeks with rufous reflections; front broader than the

eyes ; frontal band blackish or brown; vibrissal swellings parallel. Antenne with the first two joints

and the base of the third rufous, the latter for the rest blackish; second joint prominent, with some

bristly hairs; third joint twice as long as the second ; arista black, thickened at the base, finely plumose.

Proboscis shining black, scarcely longer than the head ; palpi rufous, slender, slightly thickened towards

the tip. Thorax cinereous, with five black dorsal stripes, the three median linear and close together ;

scutellum rufous, but covered by a grey tomentum. Abdomen ovate, cinereous, with dark brown or

blackish reflecting spots; second segment with two marginal macrochete ; third and anal segments with

a row of submarginal and a pair of discal macrochete, the discal ones of the third segment sometimes

absent (or broken off ?) ; ventral surface grey. Legs rufous, with black tarsi; all the tibie with scattered

and rather long bristles. Tegule whitish. Wings brownish-grey, proportionately large; small cross-vein

on the middle of the discal cell; curvature of the fourth vein somewhat rounded ; apical and posterior

cross-veins distinctly curved.

Hab. Mexico, Venta de Zopilote 2800 feet, Amula 6000 feet, Omilteme 8000 feet,

Sierra de las Aguas Escondidas 9500 feet, all in Guerrero, Mexico city (H. H. Smith).

A large series of specimens, all females.

RHYNCHODEXIA. 233

13. Rhynchodexia punctipennis, sp. n., ¢ 2.

Blackish ; abdomen with lateral whitish or yellowish spots; basal joints of the antenne and the palpi rufous ;

base of the wings and small cross-vein fuscous.

Length 9-11°5 millim.

Blackish or piceous, somewhat shining. Head whitish-grey, the front with blackish, the oral margin and

cheeks with brownish-rufous, reflections ; front of the male much narrowed behind, the eyes being nearly

contiguous on the vertex, that of the female broader than the eyes; frontal band fuscous ; vibrissal

swellings parallel. Antenne with the first two joints and the base of the third rufous, the latter for the

rest blackish ; second joint prominent, with a long and some short bristles ; third joint twice as long as

the second; arista thickened in its proximal half, and in the middle delicately plumose. Proboscis black,

a little longer than the head ; palpi rufous, slightly thickened towards the tip, and with long hairs. Thorax

black, in some specimens (especially in the females) anteriorly with whitish tomentum, which is inter-

rupted by the beginning of three black bands, the middle band showing more or less three lines; scutellum

piceous or even dark rufous. Abdomen piceous, short-conical in the male, broadly ovate in the female ;

second and third segments with yellowish-white lateral spots; in the female these spots are larger and

also present on the anal segment. The thorax and abdomen of the male are very hairy and beset with

many macrochete; in the female the macrocheete of the abdomen are less numerous and the discal. ones

shorter than the marginal. Legs black or piceous; hind tibia of the male slightly curved ; underside of

the femora and the outer side of the tibize with many long bristles ; foot-claws and pulvilli elongate im the

male, the pulvilli obscure. Tegule grevish, with a yellow margin. Wings cinereous, the basal cells and

a spot on the small cross-vein brown ; this cross-vein on the middle of the discal cell; curvature of" the

fourth vein forming a rounded angle ; apical cross-vein concave ; posterior cross-vein curved.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer), Omilteme 8000 feet, and Sierra

de las Aguas Escondidas 9500 feet, both in Guerrero (H. H. Smith).

Four male and six female specimens.

14. Rhynchodexia angulata, sp.n., ¢ 2.

Blackish or dark cinereous; thoracic dorsum with black stripes; abdomen with black and whitish reflecting

spots; palpi and base of the antenne rufous ; curvature of the fourth vein angular.

Length 9-10°5 millim.

Head whitish, with dark grey reflections; oral margin slightly rufous; front of the male narrowed behind,

that of the female broader than the eyes; frontal band black or dark brown ( ¢) or rufous-brown ( @ ) ;

vibrissal swellings parallel. Antenne black, the two basal joints and the base of the third usually rufous ;

second joint with long bristles; third joint nearly twice as long as the second ; arista black, thickened at

the base. Proboscis black; palpi rufous, slightly thickened towards the tip. Thorax obscure cinereous,

with five black stripes, the three median close together ; in some specimens the thoracic dorsum blackish,

only before the transverse suture with cinereous tomentum and stripes; scutellum black, with some

reddish tint. Abdomen of the male conical, that of the female ovate, convex, pointed towards the anus;

in both sexes cinereous, with blackish-brown and whitish reflecting spots, in the male with many discal

and marginal macrochete, in the female with macrochete on the hind margins of the segments and also

a pair on the disc of the third. Legs black, the tibie piceous (sometimes rufous); front femora with

regularly arranged bristles ; middle and hind tibize with scattered bristles ; foot-claws and pulvilli elongate

in the male, the pulvilli yellowish-grey. Tegule yellowish. Wings grey; curvature of the fourth vein

with an acute angle and in some specimens with a very short appendage; small cross-vein on or a little

before the middle of the discal cell; apical and posterior cross-veins curved.

Hab. Muxtco, Ciudad in Durango (Forrer), Jalisco (Schumann), Acapulco, Xucu-

manatlan 7000 feet, Omilteme 8000 feet, Sierra de las Aguas Escondidas 9500 feet,

all in Guerrero (H. H. Smith).

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1891.

234 DIPTERA.

15. Rhynchodexia striata, sp.n., ¢. (Tab. V. figg. 6; 6a, head.)

Thorax light grey, with well-defined black bands ; abdomen cinereous, with black reflecting spots; antenne

black, with the base rufous; palpi rufous ; legs black; tegule and base of the wings yellow.

Length 15 millim.

Of a more oblong shape than the preceding species. Head light sericeous-grey, with dark reflections; front

much narrowed behind; frontal band black, immediately before the antenne somewhat rufous; vibrissal

swellings parallel. Antenne short, the two basal joints and the base of the third rufous, the latter for the

rest black ; second joint prominent, with a long and some shorter bristles ; third joint twice as long as the

second; arista densely plumose. Proboscis black, its terminal lips and the filiform palpirufous. Thoracic

dorsum with three distinct black bands, the median band narrower than the others and on each side accom~

panied by a small black stripe ; scutellum grey, with black reflections. Abdomen conical ; first segment

black, with two greyish lateral spots: the following segments yellowish-cinereous, with blackish reflecting

spots, which in some directions occupy the entire hind borders ; second and following segments with many

discal and marginal macrochete. Legs black, with scattered bristles ; foot-claws and pulvilli elongate,

the pulvi!li yellowish-grey. Tegule and base of the wings yellow, the wings for the rest brownish ; small

cross-vein a little before the middle of the discal cell; curvature of the fourth vein with a somewhat

rounded angle ; apical and posterior cross-veins slightly curved.

Hab. Panama, Volcan de Chiriqui 3000 feet (Champion).

A single male specimen.

16. Rhynchodexia anthracina.

Rhamphinina anthracina, Bigot, Ann, Soc. Ent. Fr. 1888, p. 265. no. 62.

Prosena obscura, Bigot, |.c. p. 264. no. 56.

Black; head whitish; palpi and base of the antenne rufous; tegule and base of the wings infuscated.

Length 8°5 millim.

Unicolorous black. Head white, with blackish reflections; oral margin rufous; front of the male narrowed

behind, that of the female as broad as the eyes; frontal band blackish-brown ; facial carina little promi-

nent; vibrissal swellings parallel. Antenne rufous; second joint somewhat prominent, with long

bristly hairs; third joint infuscated towards the tip, fully twice as long as the second ; arista brown,

long-plumose, thickened at the base. Proboscis black, longer than the head; palpi pale rufous, slender,

scarcely thickened towards the tip. Thorax on the anterior side and laterally with some grey tomentum ;

dorsal stripes very obsolete. Abdomen ovate, shining black, with some bluish tint; second and following

segments with discal and marginal macrochete. Legs black, with rather long bristles; foot-claws and

pulvilli elongate in the male, the pulvilli yellowish. Tegule and base of the wings brownish, the wings

for the rest grey; small cross-vein a little before the middle of the discal cell; curvature of the fourth

vein with a rounded angle; apical cross-vein slightly concave; posterior cross-vein curved.

Hab. Mexico (coll. Bigot), Ciudad in Durango 8100 feet (Forrer),

Two male and two female specimens have been received from Mr. Forrer.

I have seen typical examples of both Rhamphinina anthracina, Big., and Prosena

obscura, Big. Though they are in a bad state of preservation, I am able to state that

they certainly belong to one and the same species.

17. Rhynchodexia planifrons, sp.n., ¢. (Tab. V. fig. 7, head.)

Obscure cinereous; thorax with obsolete stripes; abdomen with black and whitish reflecting spots; palpi an

base of the antennz rufous; legs piceous, the knees and tibie rufous. .

Length 12 millim.

RHYNCHODEXIA. 235

Front prominent, flattened, narrowed behind; frontal band brownish-rufous, with grey reflections; face

yellowish-white, with brown reflections; vibrissal swellings parallel. Antenns short; the two basal

joints and the base of the third rufous, the latter for the rest black; second joint with short bristles ;

third joint twice as long as the second ; arista black, short-plumose, thickened at the base. Proboscis a

little longer than the head, black; palpi slender, pale rufous. Thoracic dorsum with four indistinct black

stripes; scutellum blackish. Abdomen conical, blackish, with irregular whitish reflecting spots and with

discal and marginal macrochete. Legs with a short black pile and with scattered bristles; the dark

rufous tibiee have black tips; foot-claws and pulvilli elongate, the pulvilli yellowish. Tegule and wings

greyish ; base of the wings infuscated ; small cross-vein on the middle of the discal cell; curvature of the

fourth vein rounded ; apical and posterior cross-veins curved.

Hab. Mexico, Ciudad in Durango 8100 feet (forrer).

A single male specimen.

18. Rhynchodexia przusta, sp. n., 3.

Blackish-cinereous ; antenne, palpi, legs, and hind margins of the abdominal segments black ; costal portion

of the wings blackish.

Length 9 millim.

Head whitish, the lower part of the cheeks with brownish-rufous reflections ; face distinctly carinated ; front:

trigonal, on the vertex so much narrowed that the eyes are nearly coalescent ; vibrissal swellings parallel.

Antenne black ; second joint with some bristles, one of them longer than the others ; third joint twice

as long as the second; arista thickened at the base. Proboscis shining black; palpi black, slender.

Thorax and scutellum blackish, with some grey tomentum; thoracic dorsum with obsolete black stripes.

Abdomen conical, black, with some cinereous tomentum on the front borders of the second and following

segments, and with many discal and marginal macrochete. Legs black; tibiew with scattered bristles

foot-claws and pulvilli elongate, the pulvilli yellowish-grey. Tegule large, yellowish-white. Wings

grey, with a blackish or dark brown cloud on the base and on the beginning of the costa, in which two

small hyaline spots are visible—one at the base of the second vein, the other under the end of the auxi-

liary vein; small cross-vein on the middle of the discal cell; curvature of the fourth vein with a blunt

angle; apical cross-vein slightly concave in one of the specimens, nearly straight in the other ; posterior

cross-vein somewhat curved.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer).

Two male specimens.

19. Rhynchodexia omissa, sp.n., ¢ 2.

Thorax grey, with three black stripes; abdomen black, with grey reflecting spots ; palpi and base of the

antenne rufous; legs black.

Length 8°5-13 millim.

Head whitish; cheeks and oral margin with rufous, the sides of the front with blackish, reflections ; front of

the male much narrowed behind, that of the female a little broader than the eyes; frontal band black ;

vibrissal swellings parallel. Antenne rufous; second joint prominent, with some long bristly hairs ;

third joint twice as long as the second, blackish towards the tip; arista thickened at the base. Proboscis

shining black, with small terminal lips; palpi pale rufous. Thorax grey; thoracic dorsum with three

distinct black stripes (these stripes, however, not so sharply delineated asin R. striata) ; scutellum blackish.

Abdomen conical ( ¢) or ovate (@ ), black, with whitish-grey reflecting spots, especially on the sides, and

with discal and marginal macrochete, these being stronger but less numerous in the female than in the

male. Legs black, with scattered bristles; the hind tibize in most of the male specimens somewhat

rufous; foot-claws and pulvilli elongate in the male, the pulvilli blackish, with a yellow margin. Tegulz

yellowish. Wings with a brownish-grey tint, slightly yellowish at the base; small cross-vein on the

middle of the discal cell; apical cross-vein concave at its base ; posterior cross-vein distinotly curved.

2h2

236 . DIPTERA.

Hab. Mexico, Acapulco, Amula, and Dos Arroyos, all in Guerrero (H. ‘H. Smith),

Santiago Iscuintla in Jalisco (Schumann), Northern Yucatan (Gaumer).

Five male and three female specimens.

20. Rhynchodexia imitatrix, sp.n., ¢ ¢.

Blackish ; thorax grey, with obsolete black stripes ; abdomen laterally with whitish reflections; palpi and base

of the antennex rufous ; legs black, the tibiee rufo-piceous.

Length 7°5-8°5 millim.

Closely allied to R. omissa, and, except for the blacker coloration and smaller size, difficult to distinguish

from it. Owing to the more obscure ground-colour, the thoracic stripes are not so conspicuous ; in most

of the male specimens the whitish-grey reflections on the abdomen are more extended, in such a manner

that on each of the second and third segments a large ill-defined dark spot becomes conspicuous, the

macrocheetee being inserted on this spot. The antenns are somewhat longer, especially their third joint.

Hab. Muxico, Acapulco, Omilteme 8000 feet, Sierra de las Aguas Escondidas 9500

feet, all in Guerrero, Teapa in Tabasco (H. H. Smith), Jalisco (Schumann).

Several male and two female specimens.

Notwithstanding its resemblance to R. omissa, I regard KR. imitatriv asa distinct

species; moreover, the examples of this latter were captured (with a single exception)

in other localities. Both species are allied to R. angulata (no. 14), but differ from it

by the rounded curvature of the fourth vein.

Bigot has likewise described the following species from Mexico :—

Rhamphinina dubia, Bigot, Bull. Soc. Ent. Fr. 1885, p. xi.

I have not seen the typical example of this insect, but it may perhaps belong to one

of the above-mentioned species of Rhynchodewia.

MYOCERA.

Myocera, Robineau- Desvoidy, Essai sur les Myodaires, p. 328 (1830).

Front of the male narrowed behind, that of the female broader than the eyes; face perpendicular, concave,

carinated; oral margin prominent; vibrissal swellings slightly convergent, nearly parallel; vibrisss

inserted at some distance above the oral margin; eyes bare; cheeks broad, their lower portion half as

long as the longitudinal diameter of the eyes. Antenne inserted on a line drawn through the centre of

the eyes ; third joint longer than the second ; arista plumose. Proboscis a little longer than the head ; palpi

cylindrical. Abdomen conical (¢) or ovate ( 2), convex, with marginal, but without discal, macrochete.

Legs of the male much longer than those of the female; in both sexes the tarsi longer than the tibie ;

the tibie with scattered bristles ; foot-claws and pulvilli elongate in the male. Wings longer than the

abdomen ; apical cell opened at a short distance before the wing’s tip; curvature of the fourth vein with

a blunt angle; posterior cross-vein beyond the middle between the small cross-vein and the curvature of

the fourth vein.

MYOCERA:—TROMODESIA. 237

1. Myocera rava, sp.n., 2.

Cinereous ; thorax with blackish stripes; antenne and legs black; cheeks and palpi rufous.

Length 7 millim,

Head cinereous, the front with blackish, the cheeks with rufous, reflections ; frontal band brown, broader than

the lateral portions ; face shorter than the front, sharply carinated. Antenne black, their basal joints

more or less rufous ; second joint bristly ; third joint twice as long as the second; arista thickened at

the base. Proboscis black, the terminal lips somewhat rufous; palpi pale rufous, slightly thickened

towards the tip. Thorax and scutellum cinereous; thoracic dorsum, before the transverse suture, with

several black stripes, which, however, are not always visible, the three median stripes linear. Abdomen

ovate, cinereous ; the first segment and the hind borders of the following segments with blackish reflec-

tions, which, in some specimens, are less conspicuous or even wholly absent ; second and following segments

with marginal macrochetz, the hairs and macrochet arising from black points. Legs black; middle

tibice with some long bristles; hind tibie with bristles of unequal length ; foot-claws and pulvilli short.

‘Tegule yellowish-white. Wings brownish-grey; apical cell ending nearly in the wing’s tip; small cross-

vein on the middle of the discal cell; apical cross-vein usually a little concave; posterior cross-vein

slightly curved.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer), Omilteme in Guerrero 8000

feet (H. H. Smith). |

Six female specimens.

This species seems to possess all the characters of the genus Myocera; but male

examples are required to make sure of the correctness of this determination.

One species of this genus has already been described from Mexico :—

Myocera simplex, Bigot, Ann. Soc, Ent. Fr. 1888, p. 266. no. 68.

The typical example, which I have seen, is in a bad state of preservation, and I am

not able to give an ample description; I can only state that it belongs to quite a diffe-

rent species from Jf. rava.

TROMODKESIA.

~ Tromodesia, Rondani, Dipt. Ital. Prodr. i. p. 87 (1856), & v. p. 144 (1862).

Head hemispherical ; front not prominent, narrower than the eyes(@); frontal band narrow, on each side

with a row of bristles; orbital bristles absent; eyes bare, descending to near the lower part of the head ;

face much shorter than the front, retracted and slightly concave, with inconspicuous antennal grooves,

and without any indication of a median carina; vibrisse inserted just at the oral margin. Antenne

slender, shorter than the face, inserted distinctly below a line drawn through the centre of the eyes ;

third joint somewhat longer than the second ; arista plumose only in its proximal half. Proboscis rigid,

a little longer than the head, with well-developed terminal lips; palpi cylindrical, slender. Abdomen

conical ; first and anal segments shorter than the two median segments. Legs elongate; front tarsi longer

than the tibiee ; hind tibiee with scattered bristles. Wings scarcely longer than the abdomen ; apical

cell opened at a short distance before the wing’s tip; curvature of the fourth vein with a blunt angle

and without appendage.

238 DIPTERA.

It is not without doubt that I include Z. hemorrhoidalis, Big., in Tromodesia, Rond.,

as I am not at all acquainted with the only European species of the genus, 7’. vibri-

pennis, Rond., from Italy. The above-mentioned generic characters are taken from

the Mexican species, but seem to agree tolerably well with those given by Rondani in

his Prodromus (J. ¢.).

yn & Le

Ay \

, e ° 5 i Je si te

1. Tromodesia hemorrhoidalis. (Tab. V. figg. 8; 84, head.) Dt ce thee

Tromodesia hemorrhoidalis, Bigot, Ann. Soc. Ent. Fr. 1888, p. 267. no. 69. poy

Cinereous; frontal band, thoracic stripes, hind margins of the abdominal segments, antenna, proboscis, and

legs black ; palpi and anus rufous.

Length 9 millim.

Head greyish-white ; frontal band narrower than the lateral portions ; occiput grey; vibrisse accompanied by

shorter bristles. Antenne blackish; second joint with a long bristle; third joint nearly twice as long as

the second; arista thickened and plumose in its proximal half; palpi pale rufous. Thorax and scutellum

cinereous ; thoracic dorsum with four black stripes—the median ones linear, the outer stripes broader and

less distinct ; scutellum flattened. Abdomen cinereous, with a rough pile; first segment almost wholly

black ; the second and third segments with ill-defined black hind borders ; anal segment, seen from above,

with a rufous tip—laterally the rufous colour is extended nearly over the whole segment and even on the

hind margin of the preceding one; true macrochete are only on the hind margins of the segments.

‘Legs black; the cox and the femora on the outside with a grey tomentum; middle tibie with some

bristles ; hind tibiee with several bristles of unequal length; the front tarsi have short foot-claws and

pulvilli (the middle and hind tarsi are broken off in the unique example). Tegule whitish. Wings

greyish ; small cross-vein on the middle of the discal cell; apical cross-vein slightly concave ; posterior

cross-vein somewhat curved.

Hab. Mexico (coll. Bigot).

qo.

The description is made from a female specimen, which M. Bigot has been kind

enough to send me for examination. |

STOMATODEXIA.

Stomatodecia, Brauer & v. Bergenstamm, Denkschr. der kais. Akad. der Wissensch. Wien, lvi.

p. 125 (1889).

Face perpendicular, not carinated ; oral margin slightly prominent; front in the male narrowed behind, in the

female broad, with nearly parallel sides ; frontal bristles descending as far as the root of the antenne; in

the female on each side a pair of orbital bristles; eyes bare; vibrissal swellings divergent towards the

oral margin; two long vibrisse at a short distance above the oral margin; the lower part of the cheeks

equalling one third of the longitudinal diameter of the eyes, beneath with a row of hairs or bristles.

Antenne elongate, inserted above a line drawn through the centre of the eyes ; third joint three times as

long as the second ; arista moderately long-plumose. Proboscis longer than the head, slender, its terminal

lips well developed, but small; palpi elongate, cylindrical or filiform. Abdomen conical ( ¢ ) or elongate-

oval (2); macrochete only on the hind margins of the segments. Legs long and slender, with scattered

bristles ; foot-claws and pulvilli elongate in the male. Apical cell opened at or somewhat above the wing’s

tip ; curvature of the fourth vein angular, but without appendage ; posterior cross-vein beyond the middle

of the apical cell.

This genus is allied to Prosena, but differs from it by the shorter proboscis and by

- the face not being carinated.

STOMATODEXIA. 239

1. Stomatodexia cothurnata.

Stomoxys cothurnata, Wiedem. Aussereur. zweifl. Ins. 11. p. 249. no. 5.

Prosena maculifera, Bigot, Ann. Soc. Ent. Fr. 1888, p. 264, no. 55.

Thorax whitish-grey ; abdomen yellow, transparent, with small blackish spots; antenne, palpi, proboscis, and

legs yellow, the tibize more obscure, the tarsi black.

Length 7-10 millim.

- Head yellow, with a conspicuous silvery-white reflection ; front of the male very narrow behind, elongate-

- trigonal, that of the female a little broader than the eyes; frontal band rufous (elevated in the male),

narrower than the lateral portions ; lower part of the head with black hairs, Antenne shorter than the

face ; second joint prominent, with a long bristly hair; third joint narrow, rounded at the tip; arista

thickened at the base. Palpi filiform. Thorax and scutellum covered with a light tomentum, which in

most specimens is whitish-grey in colour, but in some others has a more yellowish tint; thoracic dorsum

with scarcely any trace of dark lines. Abdomen yellow, transparent ; second segment with three black

spots on the hind margin—one dorsal, of trigonal shape, and two lateral; third segment with similar

spots, the dorsal one more elongate ; anal segment with a black dorsal line and two lateral spots ; in some

specimens these markings become obsolete or are even absent; the anal segment usually has white

reflecting spots on the front border. Hind tibie darker than the others; all the tarsi longer than the

tibie ; foot-claws and pulvilli elongate in the male, the pulvilli yellow, narrow. Tegule yellowish.

Wings greyish-yellow ; small cross-vein on the middle of the discal cell; apical cross-vein concave ;

posterior cross-vein curved.

Hab. Mexico (coll. Bigot), Acapulco, Acaguizotla, Rincon, R. Papagaio, Chilpancingo,

~ all in Guerrero 1200 to 4600 feet, Atoyac in Vera Cruz (H. H. Smith), Santiago Iscuintla

in Jalisco (Schumann).—Braziu (Wiedemann).

The description of Wiedemann is applicable in all respects, and, moreover, Professor

Brauer has confirmed my determination, after having compared some of our Mexican

examples with the original types in the Museum of Vienna.

An examination of the typical specimen of the Mexican Prosena maculifera, Big.,

proves that this insect is the female of Stomatodexia cothurnata.

9. Stomatodexia similigena, sp. n., ¢ 2.

Thorax whitish-grey ; abdomen yellow, with obsolete blackish spots; antenne partly infuscated; proboscis

black in the middle; palpi and legs yellow, the tarsi black.

Length 7-5-9°5 millim.

Agreeing with the preceding species in general coloration and in many other respects. The front of the male

is less narrowed towards the vertex, that of the female much broader than the eyes; the antenne are

rufous, the third joint fuscous on the anterior side and at the tip ; the proboscis is shining black, rufous

at the base and at the terminal lips; the palpi are thicker, especially towards the tip ; the black hairs on

the lower part of the head are short ; the black spots on the abdomen are less conspicuous ; the legs are

shorter ; the small cross-vein is distinctly before the middle of the discal cell; the apical and posterior

cross-veins are oblique and nearly straight.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A male and a female specimen.

240 DIPTERA.

MEGAPARIA, gen. nov.*

Head somewhat swollen ; front (2) more than twice as broad as the eyes; frontal bristles weak and few in

number ; two stronger bristles on the vertex ; face nearly perpendicular, longer than the front, slightly

carinated on its upper half; vibrissal swellings convergent ; vibrisse inserted far above the oral margin,

which is not at all prominent; eyes bare; cheeks very broad, their lower portion equalling the longi-

tudinal diameter of the eyes, their upper portion beset with short bristly hairs arising from dark points.

Antenne very short, inserted below a line drawn through the centre of the eyes; third joint nearly as long

as the second ; arista short-plumose. Abdomen elongate-oval, convex ; on the hind margin af the second

and third segments two dorsal macrochete and on each side a lateral one; anal segment with some

shorter macrochets. Legs long and slender, with weak bristles. Wings longer than the abdomen ; apical

cell closed and short-petiolated ; posterior cross-vein beyond the middle between the small cross-vein and

the curvature of the fourth vein, this curvature angular but without appendage.

This genus is allied to Dinera, but differs by a more elongate face and by the con-

vergent vibrissal swellings.

1. Megaparia venosa, sp. n., 2. (Tab. V. figg. 9; 9a, head.)

Cinereous; thoracic dorsum brownish; abdomen with brown spots on the hind margin of the segments ; basal

joints of the antenne rufous, the third joint fuscous ; legs rufous, the tarsi black.

Length 10 millim.

Head light grey; frontal band fuscous, as broad as the lateral portions, which have reddish reflections ; above

the root of the antenne a small, shining, rufous, triangular space. Antenne rufous; second joint some-

what prominent, with a bristle ; third joint infuscated, scarcely longer than the second ; arista thickened

at the base. (Proboscis and palpi retracted in the oral cavity). Thorax and scutellum cinereous ;

thoracic dorsum, except the margins, brownish. Abdomen cinereous, with brown reflecting spots on the

hind margins of the segments and with the hairs arising from small black warts. Legs obscure rufous,

the tarsi blackish-brown. Tegule yellowish-white. Wings brownish, their venation thick, especially the

cross-veins ; small cross-vein on the middle of the discal cell and with a fuscous transverse spot; the

fourth vein slightly bent downwards and turning with an acute angle into the apical cross-vein, which is

somewhat concave; posterior cross-vein curved.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer).

A single female specimen.

MICROCHATINA, gen. nov.}

Head hemispherical ; front of the male narrowed behind, on the vertex half as broad as the eyes, that of the

female broader than the eyes; frontal bristles short, the ocellar bristles and those on the vertex longer ;

in the female on each side a pair of orbital bristles; eyes bare; face nearly perpendicular; oral margin

not prominent ; vibrissal swellings convergent ; cheeks broad, their lower portion equal to two-thirds the

longitudinal diameter of the eyes, their upper portion, at some distance from the inner orbits, with a row

of hairs; vibrissee inserted considerably above the oral margin. Antenne short, inserted on a line drawn

through the centre of the eyes; arista not longer than the antenne, short-plumose. Proboscis as long as

the head ; palpi filiform. Abdomen ovate ; second and third segments with submarginal, the anal segment

with discal and marginal, macrochete. Legs rather short, with scattered bristles. Wings with a costal

spine; apical cell closed and rather long-petiolated ; small cross-vein beyond the middle of the discal cell ;

curvature of the fourth vein angular and with a short appendage ; posterior cross-vein before the middle

between the small cross-vein and the curvature of the fourth vein.

* uéya (large) ; mapect (cheek),

fT pixpos (small); yaérn (bristle, arista).

MICROCHATINA.—CAMARONA. 241

Microchetina seems to have some relationship with the European genera Syntomocera

and Zeuxia, and with the exotic genus Trichoprosopus, Macq., but may easily be

recognized by its peculiar venation.

1. Microchetina cinerea, sp. n., ¢ 9. (Tab. V. figg. 10; 10a, head.)

Cinereous ; palpi and basal joints of the antenne rufous ; legs black.

Length 6°5 millim.

Greyish-cinéreous ; frontal band rufous, in the male linear, in the female as broad as the lateral portions ;

basal joints of the antenne rufous, the third joint blackish but with a whitish tomentum; second joint

prominent and bristly ; third joint in the male slender and twice as long as the second, in the female a

little longer than the second ; arista black, thickened in its proximal half; proboscis black; palpi pale

rufous. Thoracic dorsum with indistinct dark lines ; abdomen with scarcely any obscure reflections, the

hairs and macrochete arising from small black points; ventral surface in the male densely haired. Legs

black ; foot-claws and pulvilli slightly elongate in the male. Tegule whitish. Wings grey; the costal

vein, the end of the second vein, the point where the third vein issues from the second, and all the

cross-veins black ; apical cross-vein distinctly curved ; posterior cross-vein straight or slightly convex.

_ Hab. Mexico, Presidio de Mazatlan (Forrer).

Two male and four female specimens.

CAMARONA, gen. nov. *

Head hemispherical ; front not prominent, much narrowed in the male; face perpendicular, slightly carinated

in the middle; eyes bare; cheeks broad, their lower portion equalling at least half the longitudinal

diameter of the eyes; vibrissal swellings slightly convergent ; vibrissw inserted at a short distance above

the oral margin and accompanied by several other bristles. Antenne: as long or nearly as long as the

face; arista densely plumose. Proboscis short, with large terminal lips; palpi rather thick. Abdomen

ovate, convex; first segment shorter than the second; male genitals somewhat prominent; macrochete

only at the hind margins of the segments. Legs rather long, with many bristles; foot-claws and pulvilli

elongate in the male. Wings longer than the abdomen; apical cell opened at some distance before the

wing’s tip; curvature of the fourth vein without appendage; posterior cross-vein beyond the middle

between the small cross-vein and the curvature of the fourth vein.

1. Camarona xanthogastra, sp.n., ¢. (Tab. V. figg. 11; 11 a, head.)

Black ; abdomen yellow, with trigonal dorsal spots and the anal segment black ; antenna and palpi rufous.

Length 9-115 millim.

Head dark grey, the lateral portions of the front and the upper part of the cheeks with white, the lower

portion of the latter with reddish-brown, reflections; front on the vertex one-third the width of the eyes ;

frontal band blackish, with fine longitudinal grooves ; the face much shorter than the front. Antenne

rufous ; second joint with short hairs and a long bristle ; third joint three times as long as the second,

rounded at the tip; arista black, thickened in its proximal half. Proboscis brown, the terminal lips

with yellow hairs; palpi dark rufous, with black hairs, Thorax and scutellum black, with a slight

bluish tint; thoracic dorsum anteriorly with some grey tomentum and indistinct black stripes. Abdomen

yellow, transparent, the first three segments with black trigonal dorsal spots—the spot of the first

segment enlarged towards the base, that of the second much smaller and extended in front into a long

point, that of the third segment united posteriorly to the black hind border of the segment, this black

* kappa; convex.

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1891. a7

242 DIPTERA.

border laterally somewhat enlarged; anal segment black, except a narrow front border, which is rufous;

the first segment with two lateral macrochete ; the second with two dorsal and two lateral macrochete ;

the third and anal segments with a row of macrochewte on the hind margins. Legs black; hind tibie

piceous ; pulvilli yellow; front tibise outwardly with a row of short bristles; middle tibie with some

long bristles ; hind tibia outwardly with several bristles of unequal length. Tegule dark brown. - Wings

brownish-grey ; small cross-vein before the middle of the discal cell; fourth vein bent downwards before

its curvature, which is nearly rectangular; apical cross-vein slightly concave; posterior cross-vein

distinctly curved.

Hab. Mexico, Sierra de las Aguas Escondidas 7000 feet, Omilteme 8000 feet, both

in Guerrero (H. H. Smith).

Four male specimens.

2. Camarona ceruleonigra, sp. n., 2.

Bluish-black ; antenne and palpi rufous.

Length 7-5 millim.

Head black, with whitish-grey reflections; front as broad as the eyes; frontal band blackish-brown ; close to

the frontal bristles are two stout orbital bristles; face longer than in C. wanthogastra, scarcely shorter

than the front. Antenne dark rufous; second joint with short hairs and a long bristle ; third joint three

times as long as the second ; arista black, thickened at the base. Proboscis black, with the terminal

lips brown; palpi rufous, thick, especially towards the tip. Thorax, scutellum, and abdomen shining

black with a bluish tint; thoracic dorsum anteriorly with some greyish-white tomentum ; abdomen with

long macrochetz at the hind margins of the second and following segments. Legs black; front tibise

outwardly with a row of bristles; middle tibiee with two very long bristles; hind tibiae outwardly with

several bristles of unequal length ; foot-claws and pulvilli short. Tegule brownish-black. Wings grey;

small cross-vein before the middle of the discal cell; apical cross-vein straight; posterior cross-vein

slightly curved.

Hab. Mexico, Omilteme in Guerrero 7000 feet (H. H. Smith).

A single female specimen.

DEXIA.

Dexia, Meigen, Syst. Beschr. europ. zweifl. Ins. v. p. 33 (1826) (sensu stricto).

Head hemispherical, somewhat swollen; front of the male usually narrowed behind, that of the female as

broad as the eyes or even broader (in the Mexican species, described below, the front is almost equally

broad in both sexes); face perpendicular, carinated; oral margin prominent; vibrissal swellings

distinctly convergent ; vibrissz inserted at some distance above the oral margin; eyes bare; cheeks

broad, their lower portion equalling at least half the longitudinal diameter of the eyes. Antenne

shorter than the face, inserted on or beneath a line drawn through the centre of the eyes; arista plumose.

Proboscis short ; palpi filiform. Abdomen conical or elongate-oval, with discal and marginal, in some species

only with marginal, macrochetx. Legs long and slender, in the male the foot-claws and pulvilli elongate.

Wings longer than the abdomen; apical cell opened at a little distance before the wing’s tip; curvature

of the fourth vein angular, sometimes with an appendage; posterior cross-vein beyond the middle

between the small cross-vein and the curvature of the fourth vein.

In the Central-American collections before me there is only a single species which

possesses the characters of the European representatives of the genus Dexia in its

restricted sense.

DEXIA.—ACRONACANTHA. 243

1. Dexia genuina, sp.n., 3 2.

Cinereous ; thorax with three blackish stripes; abdomen with blackish reflecting spots ; antenne, palpi, and

legs rufous, the tarsi black.

Length 5°59 millim.

Head light cinereous, the front with black, the cheeks with rufous reflections ; front of the male slightly

narrowed behind, on the vertex as broad as the eyes, that of the female scarcely broader; frontal band

brownish-rufous, as broad as the lateral portions ; vibrissee inserted at a little distance above the oral

margin, beneath them several other bristles of nearly the same length ; occiput swollen in its lower part.

Antenne rufous; second joint prominent; third joint slender, three times as long as the second,

somewhat infuscated ; arista thickened at the base. Proboscis rufous, especially at the base and at the

terminal lips; palpi small, pale rufous. Thorax and scutellum cinereous ; thoracic dorsum with three

ill-defined blackish stripes. Abdomen elongate-oval, cinereous, with dark reflecting spots, which in the

male form a blackish dorsal stripe, blackish hind borders to the segments, and sometimes two elongate

trigonal spots (laterally of the dorsal stripe) on the second and third segments; in the female the

abdomen has a greyish tint and the reflecting spots are more irregular, a black dorsal stripe, however,

being visible; only marginal macrochete are present ; in the male the ventral surface is densely haired.

Legs, including the coxe, rufous, the coxe with grey tomentum; the tarsi black; in the female the

femora have on the upperside a blackish stripe—this is sometimes so extended on the front pair that

they might be described as black with a rufous tip, while on the middle and hind femora it is extended

to a circle before the end ; foot-claws and pulvilli slightly elongate in the male, the pulvilli yellowish-

grey. Tegule yellowish-white. Wings brownish-grey ; small cross-vein under the end of the first vein

and on the middle of the discal cell; curvature of the fourth vein in one of the male specimens with a

short appendage, this being wholly absent in the others; apical cross-vein deeply concave ; posterior

cross-vein nearly straight.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

Two male and three female specimens.

ACRONACANTHA, gen. nov. *

Head (seen from in front) higher than broad, narrowed below; face nearly perpendicular, not carinated ;

antennal grooves deep; oral margin not prominent ; cheeks broad, their lower portion equalling more

than the half the longitudinal diameter of the eyes ; vibrissal swellings distinctly convergent ; vibrisss

inserted at some distance above the oral margin. Eyes bare. Antenne short, slender, inserted above a

line drawn through the centre of the eyes; third joint longer than the second ; arista short-haired,

Proboscis short and thick; palpi cylindrical. Abdomen elliptical; macrochete long, only at the

hind margin of the segments. Legs slender, with scattered bristles ; tarsi longer than the tibia.

Wings broad, with a costal spine; apical cell opened a little before the wing’s tip; curvature of the

fourth vein angular and with a short appendage ; posterior cross-vein in the middle between the small

cross-vein and the curvature of the fourth vein ; sixth vein reaching the hind border of the wing.

1. Acronacantha nubilipennis, sp.n.¢. (Tab. V. figg. 12; 12a, head.)

‘Blackish ; front borders of the abdominal segments grey ; antenne rufous, with black tip; legs partly rufous ;

wings clouded with brown.

Length 7 millim. :

-Face and cheeks yellowish-white, with reddish-brown reflections; front blackish, Antenne rufous, the

. apical half of the third joint and the arista blackish ; third joint three times as long as the second.

Proboscis black, with the terminal lips rufous. Thorax, scutellum, and abdomen black, with some grey

tomentum ; thoracic dorsum without distinct stripes ; front borders of the second and following segments

* dxpoy (margin); dxav0a (spine).

272

244 DIPTERA.

light grey. Legs black, the femora with whitish tomentum ; the tip of the front cox, the middle and

hind coxe entirely, the tip of the femora, and the inner side of the tibiz rufous; bristles of the legs long,

but not numerous. Tegule and wings brownish; a dark shadow covers the mediastinal cell and is

extended over the small cross-vein ; a similar shadow borders the posterior cross-vein ; the apical half of

the costa and the whole tip of the wing are somewhat obscure; the costa, from the base to the costal

spine (at the end of the auxiliary vein), is beset with short bristles; apical cross-vein distinctly concave,

its end parallel with the third vein ; posterior cross-vein straight.

Hab. Costa Rica, Volcan de Irazu (Rogers).

A single female specimen.

DEXIOSOMA.

Dexiosoma, Rondani, Dipt. Ital. Prodr. i. p. 85 (1856).

Front broad; face perpendicular, not carinated in the middle; cheeks moderately large, with weak hairs ;

in the femate, close to the frontal bristles, two orbital bristles ; oral margin retracted ; vibrissal swellings

nearly parallel; vibrisse inserted at a considerable distance above the oral margin and some other

bristles just at the margin. Antenne inserted above a line drawn through the centre of the eyes; third

joint longer than the second ; arista plumose. Proboscis short and thick, retractile, with distinct terminal

lips ; palpislender. Abdomen elongate-oval or elliptical, with only marginal macrochecte. Legs elongate ;

hind tibiee with bristles of unequal length. Wings with a costal spine ; curvature of the fourth vein angular,

with an appendage ; apical cell opened at a short distance before the wing’s tip; posterior cross-vein

beyond the middle between the small cross-vein and the curvature of the fourth vein.

1. Dexiosoma vibrissatum, sp. n., \. (Tab. V. figg. 13; 18 a, head.)

Cinereous ; thoracic stripes, first abdominal segment, hind borders of the other segments, and legs black ;

antenna, palpi, and terminal lips of the proboscis rufous.

Length 10°5 millim.

Front broader than the eyes, greyish; frontal band brown, as broad as the lateral portions ; frontal bristles

rather strong; face and cheeks with white and rufous reflections; cheeks under the eyes nearly

equalling the longitudinal diameter of the eyes; vibrisse much above the oral margin, two other

bristles just at the margin, and some long bristly hairs along the lower part of the head. Antenne

rufous, much shorter than the face; third joint three times as long as the second; arista rufous, rather

thick, and densely plumose. Proboscis short, its large terminal lips and the small palpi rufous. Thorax

and scutellum cinereous ; thoracic dorsum with four black stripes—the intermediate ones very distinct,

convergent in front, and continued somewhat behind the transverse suture, the lateral stripes broader,

less defined and reaching the base of the thorax ; scutellum flattened. Abdomen elliptical, the segments

of nearly equal length; first segment black, the following segments greyish, with well-defined black

hind borders; the grey colour on the sides has white reflections; the black borders occupy nearly

half the length of the segments; strong macrochete are on the hind margins of all the segments.

Legs black ; front femora with a row of bristles on the upper- and undersides; middle and hind femora

with bristles on the underside only ; all the tibize with several long bristles; tarsi a little longer than

the tibie; foot-claws and pulvilli slightly elongate, the pulvilli yellowish. Tegule whitish. Wings

brownish-grey ; small cross-vein under the centre of the mediastinal cell and before the middle of the

discal cell; apical cell narrowly opened at a short distance before the wing’s tip; curvature of the fourth

vein rectangular and with a small appendage ; apical cross-vein concave ; posterior cross-vein nearly

‘straight.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single male specimen.

DEXIOSOM4A.—MACROMETOPA. 245

. Bigot has described two species of this genus, both from Mexico :—

Dexiosoma fumipenne, Bigot, Ann. Soc. Ent. Fr. 1888, p. 270. no. 84.

partitum, Bigot, l.c. no. 85. 4

The author has been kind enough to send me the typical examples of these species

for examination :—

The first mentioned does not possess the generic characters of Dexiosoma; see my

annotations under Rhynchodewia fraterna, p. 230.

D. partitum, on the contrary, seems to be a true Dexiosoma; the typical specimen,

however, is in too bad a state of preservation to be more amply described, but I

can state that it belongs to quite a different species from D. vibrissatum.

MACROMETOPA.

Macrometopa, Brauer & v. Bergenstamm, Denkschr. der kais. Akad. der Wissensch. Wien, lvi.

p. 117 (1889).

Front convex and prominent, in the male narrowed behind; face convex, carinated ; cheeks broad, their

lower portion exceeding the longitudinal diameter of the eyes; vibrissal swellings parallel, disunited from

the antennal grooves; oral cavity elevated, its margin with a row of bristles ; vibrisse inserted

considerably above the oral margin, not longer than the other bristles on the facial ridges; eyes small,

bare. Antenne very short, inserted beneath a line drawn through the centre of the eyes ; third joint as

long as the second ; arista with short hairs. Proboscis shorter than the head, with distinct terminal lips ;

palpi thickened and with long bristly hairs on the tip. Abdomen elongate-oval, convex, with discal and

marginal macrochete. Legs robust, with many hairs and bristles; tarsi scarcely longer than the tibie ;

foot-claws and pulvilli elongate in the male. Wings longer than the abdomen ; apical cell opened at

gome distance before the wing’s tip; curvature of the fourth vein somewhat rounded and descending

towards the posterior margin of the wing, without appendage.

1. Macrometopa calogaster. (Tab. V. figg. 14; 14a, head.)

Microphthalma calogaster, Bigot, Ann. Soc. Ent. Fr. 1888, p. 266. no. 66.

Macrometopa mexicana, Brauer & v. Bergenst. Denkschr. der kais. Akad. der Wissensch. Wien,

lvi. p. 166.

Blackish ; thorax with obsolete black stripes ; abdomen testaceous, with a black dorsal band; palpi and base

of the antenne rufous.

Length 11:5 millim. .

Frontal band black, broader than the lateral portions ; on the vertex a white point; face and cheeks grey,

with brownish reflections; on the cheeks some fine and weak hairs. Antenne rufous, the second joint

prominent and with some hairs ; the third joint, except its base, black; arista black, thickened at the

base and with short hairs. Proboscis black; palpi rufous. Thorax and scutellum black: thoracic

dorsum anteriorly with some grey tomentum and indistinct black stripes. Abdomen with a broad black

dorsal band, laterally testaceous with grey reflections ; second and following segments with many discal

and marginal macrochete. Legs black, the hind tibize piceous ; front femora with a row of bristles on

the upper- and undersides ; middle and hind femora with bristles on the underside; middle and hind

tibiee with several rather long bristles ; foot-claws and pulvilli elongate in the male, the pulvilli blackish,

Tegule and wings brownish-hyaline ; small cross-vein oblique, nearly on the middle of the discal cell ;

posterior cross-vein distinctly undulate.

246 . DIPTERA,

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet, Cuernavaca in Morelos (H. H.

Smith).

Three male and three female specimens. | .

I have examined the typical example of Microphthalma calogaster, Big. ; it is

perfectly conspecific with Macrometopa mewicana, Br. et Vv. Berg. These authors’

specimens, like that of Bigot, were from Mexico. |

STENODEXIA, gen. nov. *

Head hemispherical ; front narrowed behind ; frontal bristles descending to the root of the antenne; face

short, not carinated; vibrissal swellings parallel; vibrisse inserted at a short distance above the oral

margin; eyes hare; the lower part of the occiput greatly developed and with rows of hairs. Antenne

inserted on a line drawn through the centre of the eyes, slender, shorter than the face ; arista moderately

plumose. Proboscis short and thick, with very distinct terminal lips ; palpi small, cylindrical. Abdomen

nearly cylindrical, twice as long as the thorax, the segments of equal length ; discal and marginal macro-

cheete present. Legs slender ; foot-claws and pulvilli elongate in the male. Wings a little shorter than the

abdomen, with a costal spine and the whole costa with short bristles ; apical cell narrowly opened near

the wing’s tip ; posterior cross-vein in the middle between the small cross-vein and the curvature of the

fourth vein.

1. Stenodexia albicincta, sp. n.,3. (Tab. V. figg. 15; 154, head.)

Black ; thorax whitish-grey, anteriorly with obsolete black lines; second and third abdominal segments with

whitish front borders.

Length 8 millim.

Head black, with whitish reflections; frontal band black, narrow; beard white. Antenne black; second

joint somewhat rufous, with several bristles ; third joint twice as long as the second. Proboscis black,

its terminal lips and the palpi rufous. Thorax covered with a whitish-grey tomentum ; some black lines

are scarcely conspicuous before the transverse suture ; scutellum blackish. Abdomen shining black; the

second and third segments with whitish front borders, that of the third segment a little broader than the

other ; anal segment (seen laterally) obliquely truncated, with two small rufous appendages ; first segment

with two marginal macrochate ; second segment with two discal and two marginal macrochete; third

and anal segments with two discal and a row of marginal macrochete. Legs black; tibise with scattered

bristles ; pulvilli greyish-yellow. Tegule and halteres yellowish. Wings greyish-yellow ; curvature of

the fourth vein with a blunt angle; apical and posterior cross-veins nearly straight.

_ Hab. Mexico, Teapa in Tabasco (H. H. Smith), Temax in North Yucatan (Gawmer).

Seven specimens (all males). :

. CHOLOMYIA.

Cholomyia, Bigot, Bull. Soc. Ent. Fr. 1884, p. xxxvii.

Front slightly prominent, in the female as broad as the eyes, in the male so narrowed that the eyes are nearly

contiguous on the vertex ; frontal bristles descending to the root of the antenne ; face somewhat concave,

not carinated; cheeks bare, their lower portion equalling half the longitudinal diameter of the eyes ;

vibrissal swellings parallel; vibrissee inserted just at the oral margin. Eyes bare. Antenne inserted ona

line drawn through the centre of the eyes; third joint: much longer than the second ; arista long-plumose.

Proboscis short, retractile ; palpi cylindrical. Abdomen conical ( ¢) or elongate-oval (2), with only

marginal macrochets. Legs slender, with weak bristles, the tarsi of the first and hind pairs longer than

* grevds (narrow); Dexia,

CHOLOMYIA.—MELALEUCA. 247

the tibie ; in the male the middle legs disproportionately elongate, at least twice as long as the others ;

foot-claws and pulvilli elongate in the male. Wings longer than the abdomen ; apical cell opened at the

wing’s tip; curvature of the fourth vein with a blunt angle and without appendage ; posterior cross-vein

beyond the middle between the small cross-vein and the curvature of the fourth vein, | oe

1. Cholomyia inzequipes. (Tab. VI. figg.1; la, head; 2, the insect seen from

behind.) |

Cholomyia inequipes, Bigot, Bull. Soc. Ent. Fr. 1884, p. xxxvil.

Thorax and scutellum black, wholly or partly with a whitish tomentum ; abdomen yellow, black towards the

anus; legs yellow, the middle and hind tibie and all the tarsi brownish.

Length 8°5 millim.

Head white ; frontal band blackish-brown, in the male trigonal, in the female as broad as the lateral portions.

Antenne yellowish (4) or rufous (2); third joint from three to four times as long as the second ; arista

blackish, thickened at the base and at the thickened portion more densely pilose. “Proboscis brown, the

terminal lips rufous; palpi pale rufous, in the female slightly thickened towards the tip. Thorax and

scutellum black ; in the male the thoracic dorsum before the transverse suture and an oblique band on the

pleurs, from the shoulders to the middle cox, are white; in the female the whole thorax, and even the

scutellum, with a whitish tomentum. Abdomen of the male yellow, transparent, shining ; the base of the

first segment and the hind border of the second brownish ; third segment with a broad black hind border ;

anal segment black, anteriorly with a white lateral spot ; in the female the yellow coloration is reduced

to the first segment and a rather narrow front border on the second, the latter with whitish reflections,

the remaining portion of the abdomen being shining black, the third and anal segments with white

lateral spots ; macrochwte are on the hind borders of the third and anal segments, in the female also on

that of the second segment. Legs yellow, the tibis (except the front pair) and tarsi brownish ; in the

male the legs very slender, the middle pair unusually long (the femora and tibie being more than twice as

long as the others), and the middle and hind femora black towards the tip. Tegule yellowish. Wings

of the male yellowish, somewhat infuscated on the outer half of the costa, those of the female grey ;

small cross-vein on the middle of the discal cell; apical cross-vein concave; posterior cross-vein oblique

and slightly curved.

-Hab. Mexico, Xucumanatlan 7000 feet, Omilteme 8000 feet, both in Guerrero,

Teapa in Tabasco (H. H. Smith).

One male and three female examples.

The species is a very handsome one. It is possible that it may be the Musca longipes,

Fabr. ; the description of Wiedemann (Aussereur. zweifl. Ins. ii. p. 379) agrees in some

respects, but contains nothing about the peculiar length of the middle legs; Fabricius

gives: “pedes elongati.”

MELALEUCA, gen. nov.* a a

Front convex; face perpendicular, not carinated, though very slightly elevated in the middle; vibrisgal

swellings parallel or even somewhat divergent towards the oral margin, which is not prominent; eyes

bare ; vibrissw inserted at a short distance above the oral margin, and not longer than the bristles beneath

them ; checks broad, their lower portion equalling two-thirds the longitudinal diameter of the eyes.

Antenne inserted beneath a line drawn through the centre of the eyes ; third joint slender, much longer

than the second; arista densely plumose. Proboscis short; palpi cylindrical. Abdomen ovate; first and

anal segments shorter than the two median ones; only marginal macrochete. Legs rather short, with

scattered bristles; the tarsi longer than the tibie. Wings longer than the abdomen ; apical cell opened

* uédas (black) ; Aev«ds (white or grey).

248 DIPTERA.

at a short distance before the wing’s tip; curvature of the fourth vein angular, but without appendage ;

posterior cross-vein beyond the middle between the small cross-vein and the curvature of the fourth vein.

1. Melaleuca spectabilis, sp.n.,9. (Tab. VI. figg. 3; 3a, head.)

Grey ; frontal band, antenna, palpi, stripes on the thorax, hind borders of the abdominal segments, and legs,

black; basal joints of the antenne rufous.

Length 11 millim.

Head whitish, without darker reflections; front broader than the eyes; frontal band as broad as the lateral

portions ; close to the frontal bristles three orbital bristles. Antenne black, the basal joints rufous ;

second joint prominent, densely haired, and with a rather long bristle ; third joint three times as long as

the second ; arista thickened in its proximal half, long-plumose. Proboscis black, with the terminal lips

rufous. Thorax and scutellum light grey; thoracic dorsum with four black stripes—the median ones

linear and only conspicuous before the transverse suture, the lateral stripes much broader, in the form of

four spots, two before and two behind the suture; front margin of the scutellum black. Abdomen light

cinereous, the second segment slightly tinted with yellow; first segment black, the following ones

with well-defined black hind borders, which on the second and third segments are trigonally enlarged in

the middle ; the anus shows a tendency to become rufous; the macrochetz on the hind margins of the

second and third segments are decumbent, and therefore less conspicuous. Hind tibie with bristles of

unequal length ; foot-claws and pulvilli short. Tegule white. Wings grey ; small cross-vein on the

middle of the discal cell ; apical cross-vein slightly concave ; posterior cross-vein oblique and curved.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

A single female specimen.

EUANTHA.

Euantha, Van der Wulp, Tijdschr. voor Entom. xxviii. p. 198 (1885).

Body slender. Front arcuate, as broad as the eyes, in the male narrowed towards the vertex; fgce perpendi-

cular, not carinated, but convex between the antennal grooves; vibrissal swellings parallel; cheeks

narrow, their lower portion, however, nearly equalling half the longitudinal diameter of the eyes; vibrissz

at some distance above the oral margin, which is not prominent; beneath the vibrisse a row of shorter

bristles; eyes bare. Antenne short, inserted beneath a line drawn through the centre of the eyes; third

joint longer than the second; arista long-plumose. Proboscis rather short, with well-developed terminal

lips; palpi small, cylindrical. Abdomen cylindrical, with discal and marginal macrochete. Legs elongate

and robust ; hind tibie slightly curved and attenuate at the base ; tarsi somewhat compressed ; foot-claws

and pulvilli short in both sexes. Tegule large. Wings longer than the abdomen, variegated with yellow

and brown; curvature of the fourth vein angular, usually with a short appendage; apical cell broadly

opened before the wing’s tip ; posterior cross-vein beyond the middle between the small cross-vein and the

curvature of the fourth vein.

The species of this genus are very elegant flies. In the collections before me I find

thirteen specimens belonging to it, none of which quite agree inter se, especially as

regards the extension and shape of the markings on the wings. I believe these

examples belong to two species: one (Dexia dives, Wiedem.) is yellower in colour and

has in the male the sides of the abdomen largely yellowish-rufous, and the orbital

bristles absent in both sexes; the other (Euantha pulchra), of which only female

examples have been captured, is more obscure, and has the light parts of the body

whitish-grey in colour.

Dexia aucta, Wiedem., and D. eques, Wiedem., both from Brazil, may perhaps belong

to the genus Luantha.

EUANTHA. 249

1, Euantha dives. (Tab. VI. figg. 4; 4a, head.)

Dexia dives, Wiedem. Aussereur. zweifl. Ins, ii. p. 377. no. 15.

Sericocera pictipennis, Macq. Dipt. Exot. ii. 3, p. 67, t. 7. fig. 5.

Head yellowish-white; in the male the hind portion of the front half as broad, in the female nearly of the

same width, as the eyes; frontal band black; cheeks beneath the eyes with a subtrigonal blackish spot ;

beard yellowish. Antennze—of the male rufous, with the third joint somewhat infuscated towards the tip,

this joint at least twice as long as the second,—that of the female blackish ; arista rufous in both sexes.

Proboscis brown ; palpi rufous, in the female darker or even black. Thoracic dorsum whitish- or yellowish-

grey, with two sharply limited black bands which do not fully reach the posterior margin of the thorax ;

pleure black, with a perpendicular, large, whitish median band ; scutellum light grey, blackish at the base.

Abdomen of the male black, laterally with yellow, somewhat transparent portions, which occupy the whole

second segment and a part of the first and third segments; the second and third segments have greyish

front borders, and the anal segment has a large dorsal spot of the same colour; on the ventral side is a

whitish or yellowish pilosity; first segment on the dorsal part with two marginal macrochete; the

following segments with discal and marginal macrochete ; the lateral macrochete are at the hind margins,

but the first segment also has a pair of them behind the middle. The abdomen of the female is black,

without any yellow coloration at the sides; the light grey front borders of the median segments and the

dorsal spot on the anal segment are more conspicuous; the yellowigh pile on the ventral side is absent ;

the disposition of the macrochete is quite the same as in the male. Coxe black, on the front side with

silvery-white reflections ; femora and tibie yellowish-rufous, the tibiz, especially the hind ones, usually

somewhat infuscated, the tarsi black; in the female the femora are blackish towards the tip and the tibie

nearly as dark as the tarsi. Tegule yellowish. Wings brownish-yellow at the base and along the costa;

the veins, or at least some of them, broadly bordered with dark brown ; small cross-vein on the middle

of the discal cell ; apical and posterior cross-veins slightly curved, in some specimens straight.

Length 12:5 millim.

Hab. Nortu America, Kentucky, Philadelphia.—Mexico, Chilpancingo 4600 feet,

Amula 6000 feet, and Omilteme 8000 feet, all in Guerrero (H. H. Smith); GuatEMata,

Chiacam in Vera Paz (Champion).

Two male and six female specimens.

Wiedemann considered his specimen to be a female, but his description, especially

so far as it concerns the coloration of the abdomen, seems to indicate the male ; pro-

bably he was mistaken as to the sex, owing to the short foot-claws and pulvilli.

Macquart mentions both sexes; his figure, which in more than one respect is inaccurate,

shows erroneously the foot-claws and pulvilli elongate.

fe Pere > bor

9, Euantha pulchra, sp. n.,9 2 "4 a

This species, of which the collections before me contain only females, is closely allied to £. dives. It agrees

with it in size, but has a more obscure aspect. The front is a little broader than that of the females of

E. dives, and shining black, the black frontal band thus being less conspicuous; close to the frontal bristles

is a pair of orbital bristles, which are directed forward (these being absent in H. dives); the face and

cheeks have more silvery-white reflections ; the scutellum is black; the front borders of the second and

following abdominal segments are not grey, but silvery-white and less sharply delineated. The pattern

of the wings is quite similar to that of H. dives, and also varies in the different individuals, but is usually

somewhat darker.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

tt ee

Five female specimens.

BIOL. CENTR.-AMER., Dipt., Vol. IT., Judy 1891. 2k

250 DIPTERA.

LEPTODA.

Leptoda, Van der Wulp, Tijdschr. voor Ent. xxviii. p. 196 (1885).

Body elongate. Front narrowed behind, especially in the male; frontal bristles weak ; face perpendicular,

not earinated; eyes bare; cheeks broad, their lower portion equalling at least half the longitudinal

diameter of the eyes; vibrissal swellings parallel ; vibrisse inserted nearly at the oral margin. Antenne

elongate, inserted beneath a line drawn through the middle of the eyes; third joint three times as long as

the second ; arista densely plumose. Proboscis short, with well-developed terminal lips ; palpi cylindrical.

Abdomen conical ; macrochwte only at the hind margins of the segments, sometimes absent on the first

segments. Legs slender; middle femora longer than the others; foot-claws and pulvilli (at least in

L. gracilis) elongate in the male. Tegule large. Wings a little longer than the abdomen; apical cell

opened nearly at the wing’s tip; posterior cross-vein beyond the middle between the small cross-vein

and the curvature of the fourth vein; this curvature angular, sometimes with a short appendage.

The type of this genus is Dexia gracilis, Wiedem. It is possible that Deaugia

angusta, Perty (Del. Anim. Art. Bras. p. 187, t. 37. fig. 9), from Brazil, is a closely

allied species with partly infuscated wings. The description, both of the genus and

species, agrees in most respects; but in the figure the apical cross-vein is represented

as being very close to the hind margin of the wings, a character not present in Leptoda

gracilis nor in L. semirufa. Moreover, Diaugia is said to be related to Sarcophaga,

and on this account Macquart (Dipt. Exot. ii. 3, p. 93) includes it among the Sarcopha-

gine, whilst Leptoda undoubtedly belongs to the Dexine.

1. Leptoda gracilis. (Tab. VI. figg. 5; 5a, head.)

Dexia gracilis, Wiedem. Aussereur. zweifl. Ins. 11. p. 373. no. 8.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Sinith); Guaremata, San

Gerénimo (Champion).

Three male specimens.

Wiedemann’s description agrees in all points, and, moreover, the identity is confirmed

by Prof. Brauer, who has compared a Mexican specimen with the typical example in

the Museum of Vienna. The third antennal joint is slender, pointed at the tip; the

arista is black, thickened at the base ; the scutellum is reddish-grey ; the anus is rufous.

The wings, which are described by Wiedemann as hyaline with brownish veins, are

in the specimens before me greyish, with a dilute brownish shadow along the veins;

the curvature of the fourth vein forms a rectangle without appendage ; the apical cross-

vein is concave; the small cross-vein stands on the middle of the discal cell; the

posterior cross-vein is distinctly curved. Length 13 millim. —

Wiedemann was not aware of the habitat of his specimen.

2. Leptoda semirufa, sp. n. ( 3%).

Blackish ; antenne, palpi, and abdomen rufous, the latter with a black dorsal band, which is extended along

the hind border of the third segment ; curvature of the fourth vein appendiculated.

Length 9°5 millim.

LEPTODA.—URAMYIA. 251

Head cinereous, with brown reflections ; front brownish, not fully as broad as the eyes; frontal band black,

narrow. Antenne rufous; third joint rounded at the tip; arista black, thickened at the base. Thorax

blackish, with grey tomentum and obsolete dorsal stripes; scutellum grey. Abdomen rufous; the black

dorsal band interrupted at the incisions, broad on the first segment, narrow on the second, on the third

segment extended along the hind border; on the ventral side a black hind margin appears also on the

second segment ; the abdominal dorsum beset with many bristly hairs; macrochete only at the hind

margins of the segments, those of the third segment very strong. Legs black; foot-claws and pulvilli

short, the latter blackish. Tegule white. Wings greyish; small cross-vein on the middle of the discal

cell; curvature of the fourth vein rectangular and with a short appendage; apical cross-vein slightly

concave ; posterior cross-vein distinctly curved.

Hab. Muxtco, Temax in North Yucatan (Gawmer). |

A single specimen. I am in doubt as to the sex; the shape of the anus seems to

indicate that the example is a male, but the foot-claws and pulvilli are short, a character

usually found only in the female sex.

URAMYIA.

Uramyia, Robineau-Desvoidy, Essai sur les Myodaires, p. 215 (1830).

Oxydexia, Bigot, Bull. Soc. Ent. Fr. 1885, p. xxxiii.

Head hemispherical ; front in both sexes narrowed behind; face slightly inclined, not carinated ; eyes pilose ;

cheeks narrow, their lower portion equalling not more than a fourth of the longitudinal diameter of the

eyes; vibrissal swellings parallel; vibrissee nearly at the oral margin, which is not prominent. Antenne

inserted beneath a line drawn through the middle of the eyes; third joint much longer than the second ;

arista short-plumose on the proximal half, bare towards the tip. Proboscis short, with distinct terminal

lips ; palpi cylindrical. Abdomen— of the male elongate, cylindrical, with the anal segment much longer

than the preceding segment and extended in a narrow caudal process,—that of the female oblong-ovate ;

discal and marginal macrochete are present. Legs slender, with scattered bristles; foot-claws and

pulvilli elongate in the male. Tegule large. Apical cell opened at a short distance before the wing’s tip ;

curvature of the fourth vein rectangular, with a short appendage ; posterior cross-vein considerably beyond

the middle between the small cross-vein and the curvature of the fourth vein.

Both Robineau-Desvoidy and Bigot have confounded the sexes, erroneously consi-

dering the long and narrowed anal segment of the male as the ovipositor of the female.

1. Uramyia producta. (Tab. VI. figg. 6; 64a, head.)

Uramyia producta, Rob.-Desv. Essai sur les Myodaires, p. 216.

Cinereous ; antenne, stripes on the thorax, first abdominal segment, hind borders of the following segments,

and legs black; palpi rufous..-

Length 18°5-25 millim. .

Head whitish; front of the male much narrowed behind, scarcely separating the eyes on the vertex; frontal

band black or blackish-brown, elongate trigonal in shape; lateral portions of the front with brownish

reflections ; beard white. Antenne black, the basal joints showing a tendency to become rufous: second

joint prominent, with bristly hairs; third joint three times as long as the second ; arista slightly thickened

and clothed with short hairs on its proximal half. Proboscis black, with the terminal lips rufous; palpi

pale rufous, clothed with black hairs. Thorax cinereous ; thoracic dorsum with four black stripes, the

median ones linear and only conspicuous before the transverse suture; scutellum dark cinereous.

Abdomen cinereous; first segment and broad hind borders to the following segments black; on the

second and third segments the black borders somewhat extended in the middle; the whole abdomen,

including the long anal segment, densely beset with long bristly hairs. Legs black, in one of the

2h 2

252 DIPTERA.

specimens the tibie and tarsi piceous; hind tibie curved in the male; pulvilli yellowish. Tegule

whitish, Wings grey, slightly infuscated on the costa and along the veins; small cross-vein before the

middle of the discal cell ; apical and posterior cross-veins slightly curved.

Hab. Mexico, Cordova (Hége), Jalapa (M. Trujillo). —Braziu.

Two male specimens.

: CORDYLIGASTER.

Cordyligaster, Macquart, Dipt. Exot. ii. 3, p. 90 (1843).

Front of the male much narrowed behind, that of the female as broad as the eyes; face not carinated ; eyes bare,

descending nearly to the lower part of the head; cheeks narrow ; vibrissal swellings parallel ; vibrissce

inserted at the oral margin; root of the antenne beneath a line drawn through the centre of the eyes;

third antennal joint longer than the second ; arista long-plumose. Proboscis and palpi short. Abdomen

long and slender ; the first segment, and the second more or less, elongate, cylindrical, and narrower

than the following segments; discal and marginal macrochete present. Legs slender; foot-claws and

pulvilli elongate in the male. Wings shorter than the abdomen ; apical cell opened near the wing’s tip;

curvature of the fourth vein angular, sometimes with a short appendage ; posterior cross-vein beyond the

middle between the small cross-vein and the curvature of the fourth vein.

Bigot, in his synoptical table of the Dexine (Revue d’Entomologie, 1885, p. 267),

incorrectly states “that in the genus Cordyligaster the discal macrochete are absent

from the median segments of the abdomen.”

The genus was established by Macquart on Dexia petiolata, Wiedem., from Brazil.

A closely allied species from Central America is here described.

1. Cordyligaster minuscula, sp. n. ¢ @. (Tab. VI. figg.7; 7a, head.)

Shining black; face, cheeks, some tomentum on the thorax, and the front margins of the second and third

abdominal segments whitish ; costal part of the wings brown.

Length 7°5-11°5 millim. .

Frontal band black ; occiput grey, the lower part swollen, its pilosity and the beard whitish. Antenne black ;

third joint twice as long as the second. Proboscis and palpi black, the terminal lips of the former dark

rufous. Thorax in well-preserved specimens with some whitish-grey tomentum, and before the transverse

suture with more or less distinct black stripes; scutellum black. Abdomen three times as long as the

thorax, shining black, with a slight steel-blue tint; first segment longer and narrower than the second ;

third segment the broadest; second and third segments with narrow whitish front borders; discal and

marginal macrochetz present, even on the first segment. Legs black, with scattered, weak bristles ;

hind tibize thin at the base, very slightly curved; all the tarsi ( ¢ ) longer than, or ( 2 ) of nearly the same

length as, the tibie; foot-claws and pulvilli elongate in the male, the pulvilli greyish-yellow. Tegule

dilute brownish; halteres yellow. Wings brownish-grey, the costal region up to the third vein more

intense brown ; third vein from the base to beyond the small cross-vein with a row of short bristly hairs ;

small cross-vein a little before the middle of the discal cell; curvature of the fourth vein with a short

appendage ; apical cross-vein curved inwards at its base ; posterior cross-vein undulate.

Hab. Mexico, Rio Papagaio, Tierra Colorada 2000 feet, both in Guerrero, Teapa in

Tabasco (H. H. Smith).

A long series of specimens of both sexes.

From Cordyligaster petiolata, Wiedem., this new species differs by its much smaller

size, the proportionately shorter abdomen, the infuscation on the costa of the wings

CORDYLIGASTER.—CHATONA. 253

more sharply limited, and the insertion of the posterior cross-vein more remote from

the middle between the small cross-vein and the curvature of the fourth vein.

CHAETONA, gen. nov.*

Front scarcely prominent, narrowed behind in the male; frontal bristles weak, descending as far as the end of

the second antennal joint; two bristles on the vertex more robust; face nearly perpendicular, not

carinated; oral margin not prominent; cheeks bare, rather narrow; vibrissal swellings very slightly

convergent ; vibrisss inserted at a short distance above the oral margin. Eyes large, elongate-oval, bare,

descending to near the lower part of the head. Antenne elongate, slender, inserted above a line drawn

through the centre of the eyes; third joint longer than the second ; arista unusually long, short-plumose.

Proboscis short and thick; palpi cylindrical, Abdomen elliptical, the first three segments of equal length,

the anal segment shorter. Legs of moderate length, the front and middle tarsi longer than the tibie ;

foot-claws and pulvilli elongate in the male; bristles of the legs weak. Tegule large. Wings longer

than the abdomen ; apical cell opened a little before the wing’s tip; curvature of the fourth vein rounded ;

posterior cross-vein beyond the middle between the small cross-vein and the curvature of the fourth vein.

1. Cheetona longiseta. (Tab. VI. figg. 8; 8a, head.)

Dexia longiseta, Wiedem. Aussereur. zweifl. Ins. ii. p. 381. no. 22.

Greyish-white; thorax with black stripes; abdomen yellowish, with white front borders and black hind

borders to the segments and with a black dorsal stripe; antenne black; legs piceous ; palpi rufous;

’ wings brownish.

Length 7:5 millim.

Head whitish; frontal band blackish-brown ; antenne black; arista, except its thickened part at the base,

short-plumose over its whole length; proboscis black; palpi pale rufous. Thoracic dorsum before the

transverse suture with four distinct black stripes of nearly equal breadth, behind the suture a large black

spot; scutellum blackish at the base. Abdomen pale yellow, the base, a dorsal stripe, and the hind

borders of all the segments black ; the front borders of the second and following segments white; marginal

macrochete are conspicuous, and on the second segment there are indications of discal ones (perhaps they

are broken off). Legs piceous, with scattered bristles; foot-claws and pulvilli elongate, the pulvilli

yellowish. Tegule pale yellow. Wings with a brownish tint, which is more intense on the apical half

beyond the small cross-vein, but obsolete again towards the wing’s tip; small cross-vein on the middle of

the discal cell; apical and posterior cross-veins slightly curved.

Hab. Costa Rica, Caché (Rogers).—Bnaziu.

A single male specimen.

Not only is the description of Wiedemann, though founded on a somewhat damaged

example, fully applicable, but the identity is stated by Professor Brauer, who has

compared the Costa Rican insect with the typical specimen in the museum of Vienna.

2. Chetona congrua, sp. n. (2 2).

Agreeing with C. longiseta, but differing by the thoracic stripes being united two and two; wings grey, only

slightly infuscated towards the tip.

Length 5 millim.

Besides its smaller size and the above-mentioned differences (the thoracic stripes forming two broad black

bands), this species may be distinguished from the preceding by a less prominent front, the non-elongate

foot-claws and pulvilli, and the nearly straight posterior cross-vein.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

* yairn, bristle (arista).

254 DIPTERA.

A single specimen, which, owing to the short foot-claws and pulvilli, seems to be a

female; the front, however, is not broader than in C. longiseta. I am in doubt whether

this is a distinct but closely allied species, or merely the other sex of the preceding.

THELAIRODES, gen. nov.

Head hemispherical ; front broad, in the male slightly narrowed behind; face nearly perpendicular, not

carinated ; vibrissal swellings nearly or quite parallel; vibrisse inserted quite at the oral margin, which

is not prominent; eyes bare (in one species microscopically pubescent in the male), descending to near the

lower part of the head. Antenne inserted in a line with the centre of the eyes; third joint much longer

than the second; arista plumose. Proboscis short, with well-developed terminal lips; palpi cylindrical,

sometimes slightly thickened towards the tip. Abdomen conical, with only marginal macrochete on the

segments. Legs slender; foot-claws and pulvilli elongate in the male. Wings longer than the abdomen ;

third vein with a row of short bristles ; apical cell opened at a little distance before the wing’s tip; curva-

ture of the fourth vein with a blunt angle and without appendage; posterior cross-vein nearer to the

curvature of the fourth vein than to the small cross-vein.

; Allied to the European genus Zhelaira, Rob.-Desv., but differing from it by the absence

of discal macrochete on the abdomen; and, in Thelairodes vittigera and T. cinerei-

collis, by the first vein being without bristles. I include in it the following three

species :—

1. Palpi black ; larger species (length 7°5 millim. or more). . vittigera, Bigot.

Palpi yellow; smaller species (no longer than 6°5 millim) . 2.

2 Legsblack . . 2. 2. 2. 1 we ee eee we Cinereicollis, v. da. Wulp.

Coxe and femora yellowish-rufous. . . . . . . . . pallida, v. d. Wulp.

1. Thelairodes vittigera. (Tab. VI. figg. 9; 9a, head.)

Homodexia vittigera, Bigot, Ann. Soc. Ent. Fr. 1888, p. 267. no. 72.

Thorax cinereous, with black dorsal stripes ; abdomen black, the second and third segments with white front

borders, in the male the first three segments laterally yellowish ; antennz, palpi, and legs black.

Length 7:5-10 millim.

Head white, with grey reflections ; front of the male narrowed behind, on the vertex narrower than the eyes,

that of the female with nearly parallel sides and broader than the eves; frontal band black; behind the

posterior orbits a row of short bristles; beard white. Antenne black; second joint with short bristly

hairs; third joint four times as long as the second, rounded at the tip, usually somewhat rufous at the

base ; arista long-plumose, slightly thickened at the base. Proboscis black, the terminal lips yellowish-

rufous; palpi black, cylindrical, as long as the proboscis. Thorax and scutellum cinereous ; thoracic

dorsum with four black stripes—the median ones linear, the outer stripes broad; shoulders and pleure with

white reflections; base of the scutellum black. Abdomen conical, in the male twice, in the female one

and a half times, as long as the thorax, shining black, the second segment with a narrow, the third

segment with a broader, silvery-white front border; in the male the first and second segments and the

front margin of the third laterally yellowish and transparent; long and stout macrochete are on the

hind margins of the second and following segments. Middle and hind tibie with some long bristles ;

foot-claws and pulvilli elongate in the male, the pulvilli yellow. Tegule whitish. Wings grey, brownish

towards the costa and along the veins, especially in the female; the costa with short cilis and with a

spine at the end of the auxiliary vein ; third vein with a row of short bristles extending from its origin to

the small cross-vein, the latter placed before the middle of the discal cell; posterior cross-vein curved.

Hab, Mexico, Dos Arroyos, Rio Papagaio, Tierra Colorada, Tepetlapa, Amula,

THELAIRODES. 259

all in Guerrero, 1000 to 6000 feet, Atoyac in Vera Cruz, Teapa in Tabasco (H. H.

Smith).

Several specimens of both sexes.

The identity with Homodesxia vittigera, Big., is established by an examination of the

typical Mexican example, kindly sent by M. Bigot for examination.

2. Thelairodes cinereicollis, sp. n., ¢ ¢.

Cinereous ; face and cheeks white; abdomen yellow, the first and second segments with a black dorsal band,

the following segments with black hind borders ( ¢), or black with whitish front borders to the segments

(2); legs piceous ; palpi and terminal lips of the proboscis yellow.

Length 6°5 millim.

Front yellowish or somewhat ochraceous, nearly as broad as the eyes, slightly narrowed behind in the male;

frontal band black ; frontal bristles descending a little beneath the root of the antenne ; face, cheeks, and

posterior orbits white, the latter with a row of hairs; beard white; eyes of the male microscopically

pubescent. Antenne black, the third joint rufous at the extreme base; second joint with bristly hairs ;

third joint four times as long as the second, rounded at the tip; arista thickened at the base, its plumosity

shorter than in 7’. vettigera. Proboscis black, with the terminal lips yellowish-rufous ; palpi yellowish-

rufous, filiform in the male, thickened towards the tip in the female. Thorax and scutellum cinereous ;

thoracic dorsum ochraceous in the male, yellowish in the female, with very faint traces of darker stripes ;

pleuree whitish-grey. Abdomen conical in tke male; the first two segments yellow and somewhat trans-

parent, with a broad black dorsal band, which has concave sides; third segment shining black, with a

whitish front border, the lateral portion of which is more extended and of the same yellow coloration as

the preceding segments; the anal segment is whitish, with the hind border shining black; on the ventral

surface is a yellowish or whitish pilosity. The abdomen of the female is black, the second and following

segments with well-defined whitish front borders. In both sexes there are stout macrochetz at the hind

margins of the segments. Coxe whitish ; femora black, the front pair greyish on the outer side and with

whitish hairs beneath ; the front tibia and the middle and hind tibie in part rufous in tint in the male;

the two hinder pairs with scattered bristles; in the male some bristles at the base of the middle and hind

femora beneath are whitish ; foot-claws and pulvilli elongate in the male, the pulvilli yellowish, infuscated

at the base. Tegule yellowish-white. Wings greyish, without a costal spine; third vein bristly from the

base to the small cross-vein, the latter on the middle of the discal cell ; apical cross-vein a little concave ;

posterior cross-vein slightly convex (¢ ) or nearly straight ( 9 ).

Hab. Mexico, Amula 6000 feet, and Sierra de las Aguas Escondidas 9500 feet, both

in Guerrero (H. H. Smith).

A male from the latter, a female from the former locality.

3. Thelairodes pallida, sp.n., 9. (Tab. VI. figg. 10; 10a, head.)

‘Thorax and scutellum cinereous; abdomen yellow, a dorsal stripe and the third and anal segments black, the

segments with white front borders; antenne rufous, infuscated towards the tip; proboscis, palpi, and

legs yellow.

Length 6°5 millim.

Head white, somewhat silvery ; front broader than the eyes; frontal band black, narrower than the lateral

portions; occiput grey; beard white. Antenne a little shorter than the face, rufous; the third joint

brown towards the tip; arista thickened in its proximal half. Thorax and scutellum covered by a whitish-

-grey tomentum, through which the black ground-colour is partly visible. The first and second segments

and the front portion of the third segment of the abdomen are yellow and transparent; the rest of the

third segment, the anal segment, and a dorsal band on the first and second segments are shining black ;

the dorsal band is laterally concave; the second and following segments have white front borders and

256 DIPTERA.

macrochete on the hind margins. Legs, including the cox, yellowish-rufous, the middle and hind tibie

brownish, the tarsi black. Tegule whitish. Wings greyish-hyaline; small cross-vein before the middle

of the discal cell ; curvature of the fourth vein rectangular; apical cross-vein distinctly concave; posterior

cross-vein oblique and nearly straight ; first and third veins with short bristles, the first vein over its

whole length, the third from the base to beyond the small cross-vein.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

A single female specimen.

XANTHODEXIA, gen. nov.*

Head hemispherical, broader than the thorax; eyes bare, descending nearly to the lower part of the head;

front broader than the eyes ; frontal band reduced to a very narrow groove, which in the middle is linear

and at each end is somewhat enlarged triangularly; the trigonal depression on the vertex includes a

distinct ocellar tubercle; on each side of the frontal groove a row of bristles descends to the root of the

antenne ; no orbital bristles, Face not carinated ; cheeks somewhat convex ; vibrissal swellings parallel ;

vibrisse inserted at the oral margin, which is not prominent. Antennz inserted beneath a line drawn

through the centre of the eyes ; third joint longer than the second; arista distinctly plumose. Proboscis

short and thick, with large terminal lips; palpi cylindrical. Abdomen elliptical; anal segment shorter

than the other segments ; first and-seeond segments only with lateral macrochete; on the hind margins

of the third and anal segments several strong macrochete. Legs slender, though not elongate, with weak

bristles. Wings as long as the abdomen ; apical cell rather broadly opened a little before the wing’s tip ;

curvature of the fourth vein with a blunt angle and without appendage,

1. Xanthodexia sericea. (Tab. VI. figg. 11; 11a, head seen from in front ;

11 6, head in profile.)

Tachina sericea, Wiedem. Aussereur. zweifl. Ins. ii. p. 316. no. 64.

Yellow ; thoracic dorsum and scutellum yellowish-cinereous ; pleure whitish; anal segment, tibic, and tarsi

black.

Length 8°5-10 millim.

Head bright pale ochraceous, the inferior portion of the posterior orbits silvery-white ; antenne yellow, the second

joint prominent, with black hairs, the third joint three times as long as the second ; arista black, thickened

in its proximal half; proboscis yellow, with the base blackish ; palpi yellowish, slightly infuscated towards

the tip. Thoracic dorsum and scutellum with a yellowish-cinereous tomentum and scarcely any trace of

dark stripes ; pleure whitish-grey, somewhat silvery ; metanotum grey. Abdomen yellow, slightly trans-

parent, and with silvery-white reflections; a black spot at the base; hind margin of the third segment

shining black ; anal segment also shining black, but with its front border more or less rufous. Tegule

yellow. Wings greyish, at the base and along part of the costa yellow, infuscated towards the end of

the costa ; small cross-vein on the middle of the discal cell; apical and posterior cross-veins straight.

Hab. Mexico, Acapulco in Guerrero, Atoyac in Vera Cruz, Teapa in Tabasco (H. Z.

Smith).—BRaziu,

Three female specimens,

The identity of the Mexican insect with Tachina sericea, Wiedem., is stated by Prof.

Brauer, who has been kind enough to compare a specimen with the typical example

in the museum of Vienna. ‘The type has a plumose arista, a character which Wiede-

mann seems to have overlooked.

* §arOds (yellow) ; Dewia,

CALODEXIA. 257

CALODEXIA, gen. nov.*

Head hemispherical; front not prominent, in the male very narrow, in the female as broad as the eyes; face

perpendicular, not carinated ; cheeks narrow, their lower portion equalling no more than a fifth of the

longitudinal diameter of the eyes; vibrissal swellings parallel or even somewhat divergent towards the

oral margin, the vibrisse inserted nearly or quite at the margin. Eyes bare. Antenne elongate, their base

in a line with the centre of the eyes ; third joint much longer than the second; arista plumose. Proboscis

short ; palpi cylindrical or slightly thickened towards the tip. Abdomen elongate-conical ; the first three

segments of equal length, the anal segment shorter; discal and marginal macrochete or marginal ones

alone. Legs of moderate length, with weak bristles; the tarsi usually not longer than the tibiee. Wings

as long as the abdomen ; apical cell opened nearly at the wing’s tip; curvature of the fourth vein angular

but without appendage.

The species, three in number, of this new genus are very elegant flies. Some of

them resemble Cholomyia in general aspect and coloration (a partly white, partly black

thorax, and a yellow abdomen with black portions); but they differ generically by the

legs in the male not being unusually elongate, and by the eyes descending lower on

each side of the head. The three species may be distinguished in the following

manner :—

1. Eyes descending fully to the lower part of the head; abdomen

with discal and marginal macrochetz ; larger species (length

10 millim.) . . ..... . . majuscula, v. d. Wulp. Of

Eyes not fully descending to the lower part of the head ; abdomen

with marginal macrochetz only; smaller species (no longer

than6millim.). 2. 2... 1. 2 1 1 ee ee ee

2. Legs yellow ; foot-claws and pulvilli elongate in the male. . . calceata, v. d. Wulp.

Legs black ; foot-claws and pulvilli short . . . . . . . . obscuripes, v. d. Wulp.

1. Calodexia majuscula, sp.n.¢. (Tab. VI. figg. 12; 12a, head.)

Head silvery-white ; thorax yellowish-grey, with black stripes; antenne rufous, blackish towards the tip ;

abdomen yellow, with black hind borders to the segments; proboscis, palpi, and legs yellowish-rufous,

the tarsi black.

Length 10 millim.

Front narrow, with nearly parallel sides ; frontal band black, linear; the lateral portions of the front yellowish,

with silvery-white reflections; face, cheeks, and posterior orbits silvery-white ; eyes large, fully descending

to the lower part of the head; beard white; vibrissal swellings divergent towards the oral margin, the

vibrissee at a short distance above the margin. Antenne a little shorter than the face, rufous, the third

joint gradually becoming blackish towards the tip. Proboscis and palpi pale rufous; the palpi small,

cylindrical, slightly curved upwards. Thorax and scutellum yellowish-grey; thoracic dorsum with four

black stripes—the median stripes linear, the outer ones much broader; plearw grey; scutellum black.

Abdomen yellowish-rufous, laterally and on the ventral surface somewhat transparent ; hind borders of

the segments and a dorsal band black ; discal and marginal macrochete present, the discal ones arising

from black points; anus (seen laterally) obliquely truncate. Legs yellowish-rufous, the middle and hind

tibia brownish, the tarsi black; front tarsi scarcely longer than the tibie; foot-claws and pulvilli short.

* xadds (elegant); Dexia.

BIOL. CENTR.-AMER., Dipt., Vol. IT., Ju/y 1891. 21

258 | DIPTERA.

Tegule yellowish. Wings greyish-hyaline ; small cross-vein a little before the middle of the discal cell ;

curvature of the fourth vein with a blunt angle; apical cross-vein concave before its end; posterior cross-

vein slightly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single male specimen.

2. Calodexia calceata, sp.n., o 2.

Thorax black, anteriorly white ( ¢) or wholly whitish (9 ); abdomen yellow, with a dorsal band and the last

two segments shining black ; antenne black ; palpi and legs yellow, the latter partly black.

Length 5 millim.

Front of the male very narrow, scarcely enlarged on the lower part, the lateral portions represented only by a

white line on each side of the black frontal band; in the female the front is broader than the eyes and

the black frontal band as broad as the white lateral portions ; vertex ochraceous ; face, cheoks, and poste-

rior orbits white; vibrissal swellings parallel ; vibrisse quite at the oral margin. Antenne as long as the

face, black, the short basal joints more or less rufous ; arista long-plumose, thickened at the base, gradu-

ally tapering towards the tip. Proboscis black, its terminal lips and the small palpi yellow. Thorax and

acutellum black, the thorax before the transverse suture with white tomentum and indistinct black stripes ;

on the pleure a white band extends obliquely from the shoulders to the middle cox. In the female the

white tomentum is extended over the whole surface of the thoracic dorsum and pleure. Abdomen

yellow, the first and second segments and the base of the third somewhat transparent, with a rather broad

black dorsal band, which in some specimens is interrupted or reduced to dorsal spots; third segment

(except at the base) and also the anal one shining black, the anal segment with a white lateral spot; long

macrochexte are on the hind margins of the second and following segments. Legs yellow, the tibize

brownish, the tarsi black; in the male the femora have blackish tips, and the foot-claws and pulvilli are

elongate. Tegule whitish. Wings greyish-hyaline, with a dilute brownish tint at the end of the costa ;

apical and posterior cross-veins nearly straight ; the cross-veins different in position in the two sexes—

in the male the small cross-vein is at the middle, in the female distinctly before the middle of the discal

cell; the posterior cross-vein in the male is inserted in the middle between the small cross-vein and the

curvature of the fourth véin, in the female it is inserted beyond the middle.

Hab. Muxico, Venta de Zopilote in Guerrero 2800 feet, Atoyac in Vera Cruz, Teapa

in Tabasco (H. H. Smith).

Two male and two female specimens.

3. Calodexia obscuripes, sp. n.,¢.

Black, including the legs; thorax anteriorly white ; basal segments of the abdomen yellow.

Length 4 millim.

Closely allied to the preceding species, but easily distinguished by the black legs. The antenne are shorter ;

the arista is thickened only at the base, and its plumosity is not so long; the second abdominal segment

has a black hind border ; the foot-claws and pulvilli are short (that the specimen is a male is proved by

its narrow front); the wings are more purely hyaline; the apical cross-vein is slightly concave at its

end; the posterior cross-vein is inserted beyond the middle between the small cross-vein and the curvature

of the fourth vein. The vibrissal swellings are divergent towards the oral margin (as in C. majuscula).

Hab. Muxico, Atoyac in Vera Cruz (H. H. Smith).

A single male specimen.

RHOMBOTHYRIA.—PSEUDOMORINIA. 259

RHOMBOTHYRIA, gen. nov.*

Head hemispherical; front not prominent, convex; frontal bristles stout; face indistinctly carinated ; eyes

bare, descending to near the lower part of the head ; vibrissal swellings parallel; vibrisse inserted near

the oral margin, which is not prominent. Antenne inserted in a line with the centre of the eyes; third

joint longer than the second, reaching to half the face; arista short-plumose. Proboscis short, with well-

developed terminal lips; palpi small, cylindrical. Thorax quadrangular; scutellum with long macro-

chete at the hind margin. Abdomen subcylindrical, with stout, though not very long, discal and marginal

macrochetz. Legs slender, with scattered weak bristles ; foot-claws and pulvilli short (in both sexes ?).

Wings longer than the abdomen ; costal margin slightly curved, and with a row of very short bristles over

its whole length ; curvature of the fourth vein rounded; apical cell rhomboidal, opened nearly in the

wing’s tip; posterior cross-vein beyond the middle between the small cross-vein and the curvature of the

fourth vein.

1. Rhombothyria flavicosta, sp. n. (3%). (Tab. VI. figg. 13; 18a, head.)

Thorax and scutellum cinereous, the thorax with black stripes ; abdomen black, the second and third segments

with grey front borders ; legs black, the base of the femora and the knees rufous; antenne rufous, brown

at the tip. 4

Length 9°5 millim.

Head yellowish, with grey reflections ; front slightly narrowed behind; frontal band black; posterior orbits

whitish-grey, with a row of short black bristles. Antenne rufous; third joint twice as long as the

second, infuscated towards the tip; arista black, thickened in its proximal half. Proboscis black, the

terminal lips and the palpi yellow. Thorax cinereous; thoracic dorsum with several black stripes, which

behind the transverse suture become diffused into a more general black coloration ; scutellum cinereous,

with the base black. The grey front borders of the second and third abdominal segments are interrupted

in the middle by a black dorsal stripe; the discal macrochexte are inserted close to the anterior margins

of the segments. Legs black; the end of the coxe, the base of the femora, and the knees rufous ; foot-

claws and pulvilli short. Tegule yellowish-grey. Wings greyish-hyaline, along the costa with a yellow

tint ; second and third veins arcuate; small cross-vein under the end of the first vein and nearly on the

middle of the discal cell ; apical and posterior cross-veins straight.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

Six specimens, which I suppose to be males, owing to the conformation of the

front,

PSEUDOMORINIA, gen. nov.

Head hemispherical; front not prominent, narrowed behind in the male; face indistinctly carinated ; cheeks

broad, their lower portion scarcely equalling half the longitudinal diameter of the eyes; vibrissal swellings

parallel; vibrissee inserted near the oral margin, which is not prominent. Eyes bare. Antenne inserted

on or a little below a line drawn through the centre of the eyes; third joint longer than the second ;

arista short-plumose. Proboscis short, with the terminal lips distinct and turned backwards; palpi

slender, cylindrical, Abdomen elliptical, with discal and marginal macrochete. Legs with scattered

bristles; foot-claws and pulvilli elongate in the male. Wings longer than the abdomen, marked with

black and yellow ; apical cell opened just before the wing’s tip ; curvature of the fourth vein with a blunt

angle ; posterior cross-vein nearly in the middle between the small cross-vein and the curvature of the

fourth vein.

* SiuBos (rhombus) ; Oupis (cell).

212

260 DIPTERA.

This genus is allied to Morinia, but differs by the arista being short-plumose. The

single species referred to it is easily recognizable by the coloration of the wings.

1. Pseudomorinia pictipennis, sp.n., ¢. (Tab. VI. figg. 14; 144, head.)

Black ; thorax grey, with obsolete black lines; abdomen with grey front borders to the segments; wings with

the costa blackish and the disc yellowish.

Length 6°5 millim.

Head black, the face and cheeks with silvery-white reflections; front trigonal, on its upper part scarcely sepa-

rating the eyes. Antenne black, the basal joints somewhat testaceous ; third joint twice as long as the

second ; arista slightly thickened at the base. Proboscis and palpi brownish-black, the palpi a little

thicker towards the tip. Thorax black, with a bluish-grey tomentum, anteriorly with two not very

distinct black lines ; scutellum black. Abdomen black; the second and following segments with bluish-

gtey front borders and with discal and marginal macrochete. Legs black; front tibie with short, the

middle and hind tibie with longer bristles; foot-claws and pulvilli somewhat elongate, the pulvilli

yellowish. Tegule greyish-yellow. Wings grey; a brownish-black stripe on the costa, limited by the

first vein, and below this there is a clear yellowish space, this colour extending to the disc and to the

base of the wings; the costa at the apex is marked with an obscure diffuse spot which includes the end

of the second vein; small cross-vein a little beyond the middle of the discal cell ; apical and posterior

cross-veins slightly concave.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

A single male specimen.

MORINIA.

Morinia, Robineau-Desvoidy, Essai sur les Myodaires, p. 264 (1830).

Head hemispherical ; front of the male much narrowed behind, that of the female broader; face perpendicular,

not carinated; eyes bare, descending nearly to the lower part of the head; vibrissal swellings parallel ;

vibrisse inserted at the oral margin or at a short distance above it. Antenne usually short, their base in

a line with the centre of the eyes; arista long-plumose. Proboscis short; palpi cylindrical. Abdomen

subcylindrical ( 3 ) or elongate-oval ( 2 ), with discal and marginal macrochete or with marginal macrochete

only. Legs of moderate length ; foot-claws and pulvilli elongate in the male. Wings longer than the

abdomen, hyaline or somewhat infuscated towards the base and costa, but without any yellow coloration ;

apical cell opened at the wing’s tip; curvature of the fourth vein with a blunt angle, or even somewhat

rounded ; posterior cross-vein at or nearly at the middle between the small cross-vein and the curvature

of the fourth vein.

This genus contains rather small flies of a black coloration. In the Central-American

collections there are representatives of three species, generally agreeing with the Euro-

pean ones, except that they have the antenne longer ; but upon this character alone

I am not inclined at present to separate them generically. None of the Central-

American species have discal macrochete on the abdomen. For the rest they may

be distinguished as follows :—

1. Thorax black, anteriorly with three white spots . . . . . trichopoda, v. d. Wulp.

Thorax anteriorly grey or cinereous, with black stripes. . . 2.

2. Front tarsi longer than the tibie ; eyes separated (gf). . longitarsis, v.d. Wulp.

Front tarsi not longer than the tibie ; eyes contiguous towards

the vertex (¢) . cote eee we ww fumata, v. d. Wulp.

MORINIA. 261

1. Morinia trichopoda, sp.n., ¢ ¢.

Shining black; thorax anteriorly with three white spots; middle and hind legs with many long bristles.

Length 35-45 millim.

Head black ; cheeks externally with a whitish margin; front of the male trigonal, posteriorly extended to a

narrow black band separating the eyes—that of the female as broad as the eyes, whitish, with a black

median band ; vibrisse quite at the oral margin. Antenne black; third joint two and a half times as

long as the second. Proboscis and palpi black. Thorax, scutellum, and abdomen shining black, the

thorax with the shoulders and a small median spot on the anterior part white. Abdomen with scarcely

any greyish reflections, and with long macrochete at the hind margins of the second and following

segments. Legs black; middle and hind tibie with many long bristles, in the male also densely clothed

with a short pile; pulvilli yellowish-grey. Tegule brownish. Wings grey, in some specimens brownish

towards the base and costa; small cross-vein on the middle () or a little before the middle (@ ) of

the discal cell; posterior cross-vein slightly curved, in the middle between the small cross-vein and the

curvature of the fourth vein.

Hab. Mexico, Medellin in Vera Cruz, Teapa in Tabasco (H. H. Smith).

Six male and two female specimens.

2. Morinia longitarsis, sp.n., ¢ 2.

Shining black; thorax anteriorly whitish, with black stripes; abdominal segments with white front margins ;

front tarsi longer than the tibie.

Length 3°5—4°5 millim.

The male of a slender shape. Head whitish; front of the male black, very narrow, but separating the eyes—

that of the female as broad as the eyes, whitish, with a black median band ; vibrissee inserted nearly at

the oral margin. Antenne blackish-brown, slightly rufous at the base, a little shorter than the face,

longer than in M. trichopoda ; third joint three times as long as the second ; arista thickened at the base,

its pilosity shorter than in M. trichopoda. Proboscis and palpi black. Thorax and scutellum shining

black, the thorax before the transverse suture with some whitish tomentum and irregular black stripes ;

pleure greyish. Abdomen shining black ; the second and following segments with narrow white front

margins (which are broader and more distinct at the sides) and with long macrochxte on the hind

margins. Legs with some weak bristles, black: in the male long and slender, the tarsi of the front pair

nearly twice as long as the tibie, the foot-claws and pulvilli elongate, the pulvilli yellowish-grey ; in the

female shorter, the front tarsi a little longer than the tibie. Tegule dilute brownish. Wings grey ;

small cross-vein on the middle of the discal cell; curvature of the fourth vein somewhat rounded ; poste-

rior cross-vein nearly straight, in the middle between the small cross-vein and the curvature of the

fourth vein.

Hab. Mexico, Orizaba (F. D. G. and H. H. Smith), Amula 6000 feet, and Omilteme

8060 feet, both in Guerrero (H. H. Smith).

A male and two female specimens.

3. Morinia fumata, sp. n., ¢.

Shining black ; thorax anteriorly cinereous, with black lines; abdominal segments with white front margins ;

eyes contiguous on the vertex.

Length 5 millim.

Face and cheeks whitish, with black reflections; front black, trigonal; eyes contiguous on the vertex, descen-

ding nearly to the lower part of the head; vibrisse quite at the oral margin. Antenne black, shorter

than the face; third joint two and a half times as long as the second ; arista long-plumose, thickened at

the base. Proboscis and palpi black. Thorax, scutellum, and abdomen shining black ; thoracic dorsum

262 DIPTERA.

before the transverse suture with cinereous tomentum and indistinct black lines. Abdomen conical, the

second and following segments laterally with white front borders, and with macrochete at the hind

margins. Legs black, with some weak bristles; the tarsi as long as the tibie ; foot-claws and pulvilli

elongate, the pulvilli yellow. Tegule brownish. Wings with a brownish tint, more obscure on the

apical half of the costa; small eross-vein a little beyond the middle of the discal cell ; curvature of the

fourth vein angular; apical and posterior cross-veins slightly concave, the posterior in the middle between

the small cross-vein and the curvature of the fourth vein.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single male specimen.

COMYOPS, gen. nov. *

Head hemispherical; front narrow, trigonal (3); eyes distinctly pilose, contiguous on the vertex (¢),

descending nearly to the lower part of the head; face nearly perpendicular, not carinated ; vibrissal

swellings parallel or even somewhat divergent towards the oral margin, the vibrisse at or a little above

the margin. Antenne inserted in a line with the centre of the eyes ; third joint longer than the second ;

arista long-plumose. Proboscis short and thick, with large terminal lips; palpi cylindrical. Abdomen

conical, with marginal macrochzte only. Legs of moderate length, with scattered bristles ; foot-claws

and pulvilli elongate (¢). Wings longer than the abdomen; apical cell narrowly opened at the wing’s

tip; curvature of the fourth vein rounded ; posterior cross-vein in the middle or a little beyond the middle

between the small cross-vein and the curvature of the fourth vein.

This genus agrees in most respects with Morinia, but differs from it by the hairy

eyes. I include in it two Central-American species, of which male examples only are

known to me.

1. Comyops nigripennis, sp.n.,¢. (Tab. VL. figg. lo; 15 a, head seen from

in front; 15 6, head in profile:)

Black ; abdominal segments with obsolete whitish front margins; tegule and wings blackish.

Length 6°5 millim.

Head black, with greyish reflections; frontal band black, trigonal; eyes densely covered with a yellowish

pile. Antenne nearly as long as the face; third joint three times as long as the second ; arista thickened

at’ the base. Proboscis and palpi black. Thorax, scutellum, and abdomen deep black; second and

following abdominal segments with traces of narrow whitish front margins, and with rather long macro-

cheete: at the hind margins. Legs black; middle and hind tibie with some long bristles ; foot-claws and

pulvilli somewhat elongate, the pulyilli yellowish-grey. Tegule blackish-brown. Wings blackish, more

intensely so towards the base and costa; small cross-vein on the middle of the discal cell; apical cross-

vein concave; posterior cross-vein slightly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

Two male examples.

2. Comyops striaticollis, sp. n., ¢.

Black ; thorax anteriorly whitish, with black stripes ; abdominal segments with whitish front borders; tegule

whitish; palpi yellowish. .

Length 6°5 millim.

* xéuy (hair); des (sight).

COMYOPS. 2638

Head white; frontal band, antenne, and pilosity of the eyes as in C. nigripennis; vibrisse quite at the oral

margin; proboscis black, the palpi yellowish-rufous. Thorax black, before the transverse suture with

whitish tomentum and four black stripes, the median ones linear; on the pleure a whitish stripe extends

from the shoulders to the middle coxe; scutellum shining black. Abdomen shining black ; second and

following segments with greyish-white front borders, on the second segment an obsolete black dorsal

stripe; long macrochete at the hind margins of the segments. Legs asin C. nigripennis. Tegule

whitish. Wings greyish-hyaline, the apical part of the costa dilute brownish; small cross-vein a little

beyond the midde of the discal cell; apical and posterior cross-veins oblique and very slightly curved.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

A single male specimen.

The following Central-American species are included by their authors in the group

Dexine, but have not been noticed in the preceding pages :—

Megaprosopus rufiventris, Macq. Dipt. Exot. ii. 3, p. 84, t. 10. fig. 1—Mexico.

Dexia pertecta, Walker, Trans. Ent. Soc. Lond. new ser. v. p. 307.—Mexico.

Homodexia longicornis, Bigot, Ann. Soc. Ent. Fr. 1888, p. 267. no. 71.—Mexico.

flavipes, Bigot, 1. c. p. 268. no. 73.—Mexico.

spinosa, Bigot, l. c. no. 74.—Mexico.

triangulifera, Bigot, 1. c. no. 75.—Mexico.

Oplisa albifacies, Bigot, 1. c. no. 76.—Mexico.

nigrifacies, Bigot, 1. c. no. 77.—Mexico.

Pyrrosia ochracea (sic), Bigot, 1. c. no. 78.—Mexico.

Anthracomyia pallidicornis, Bigot, 1. c. p. 270. no. 86.—Mexico. ©

Myiomima sarcophagina, Brauer & v. Bergenst. Denkschr. der kais. Akad. der

Wissensch. Wien, lvi. pp. 119, 167.—Central America.

As to the genus Megaprosopus, Macq., it seems doubtful if it belongs to the group

Dexine, the arista being bare and the frontal bristles descending beneath the root

of the antennee (see the figure of the head given by Prof. Brauer in Denkschr. der kais.

Akad. der Wissensch. Wien, lvi. t. 7. fig. 147).

Dexia pertecta, Walk., also has the arista bare, and therefore its real position is

uncertain ; at all events, it cannot belong to the genus Dexia in its restricted sense.

Of the above-mentioned species described by Bigot I have examined typical examples

kindly communicated by him.

The genus Homodexia, Big., is very incompletely characterized (Bull. Soc. Ent. Fr.

1885, p. xxvi), the author stating that “it only differs from Dexiosoma, Rond., by the

absence of an appendage at the curvature of the fourth vein.” In his synoptic table

of the genera of Dexine (‘Revue d’Entomologie,’ 1885, p. 266), he adds that “the

264 DIPTERA.

antenne are inserted above the median line of the eyes, and that the arista is long-

plumose.” His first species, H. rujina, Big., from California, as regards the arista and.

the venation, agrees with the above-mentioned generic characters, but the insertion of

the antenne is distinctly beneath the median line of the eyes; in #. rujina the vibrisse

are just at the oral margin.

Homodexia flavipes, Big., is a very different insect: according to the type, the eyes

descend much lower, the arista is very slightly pubescent, and the vibrissee are inserted

at some distance above the oral margin. I should be inclined to place it in the

Tachinid-genus Telothyria, though I cannot identify it with any of the species described

by me.

Homodesia spinosa, Big., also has the arista no more than pubescent, and has a row

of short bristles along the third vein ; this latter character probably induced the author

to give it its specific name, though in his description this is not mentioned ; the insect

has the general aspect of a Morinia.

Homodexia triangulifera, Big., is again very heterogeneous; it is synonymous with

Hypostena blandita (anted, p. 142), which, in Prof. Brauer’s opinion, must be included

in the genus Gymnostylia ; Bigot’s name has priority.

Homodexia longicornis, Big., agrees in many respects with Calodexia calceata (antea,

p. 258), but I am not certain that both belong to the same species. |

The above statements, however, show that the genus Homodeaia, Big., includes very

heterogeneous forms, and therefore cannot be maintained.

As to Oplisa albifacies and O. nigrifacies, Big., these two species differ too much inter se

to be included in the same genus; and neither the one nor the other possesses the generic

characters given by Bigot himself in his analytical table (Revue d’Entomol. 1885,

p- 266). Both have more the aspect of Tachinine: O. albifacies may be included in

the genus 4nisia, though it is different from all the species mentioned by me (anted,

pp. 186 et seqg.); O. nigrifacies is conspecific with Degeeria longipes (antea, p. 155),

Bigot’s name having priority.

Pyrrosia ochracea, Big., bears a striking resemblance to the female of Phasiopteryx

bilimeki (=Neoptera rufa, v. d. Wulp, anted, p. 166). The short diagnosis given by

Bigot (Ann. Soc. Ent. Fr. 1888, p. 268) is supposed to include both sexes ; nevertheless,

nothing is said about the very abnormal shape of the wings in the male.

Anthracomyia pallidicornis, Big., is certainly misplaced in the genus Anthracomyia,

Rond., which contains only black species; I should be inclined to include it in

* ; ’ } an '

Calodewia. 'Sagir. (eo eg ie, we by ine.

The genus Myiomima, Brauer & v. Berg., seems to be allied to Rhynchodewia, Big.

The species on which it is founded is unknown to me,

PARAMINTHO. 269

Group SARCOPHAGINE.

In this group the arista is plumose, but not quite to the end; the macrochete of

the abdomen are usually present on the last two segments only ; and the male genitalia

are very prominent and, when not exserted, globular in form.

These characters are well-defined in the large genus Sarcophaga ; but in some of the

other genera, which are related more or less to the neighbouring groups, they are less

evident. |

Of the five genera of Sarcophagine now known from Mexico, one is not represented

in the collections before me.

1. Discal and marginal macrochetz on the second and following

abdominal segments ; apical cell closed (or very narrowly

opened) at the margin of the wing . . . . . . . « Paramintho, v. d. Wulp.

Marginal macrochetze only present; apical cell distinctly

opened. . 2 ee ee ee ee eee 2.

2. Abdomen grey, cinereous, or partly ochraceous, with black

reflecting spots 2. 2. 2. 6 6 ee ew ee ee ee Be

Abdomen unicolorous black or metallic, faintly greyish-

pruinose 2 ee ee ee

3. Second and third veins slightly curved; posterior cross-vein

usually undulate ; two orbital bristles in 9, nonein g . Sarcophaga, Meig.

Second and third veins and also the posterior cross-vein

straight; two orbital bristles in each sex . . . . . . Sarcophagula,v.d. Wulp.

4. Curvature of the fourth vein directed downwards and with an

appendage; hypopygium, g, very prominent; legs, 4,

densely hairy; abdomen usually black . . . . . Phrissopoda, Macq.

Curvature of the fourth vein with an obtuse angle and without

appendage; hypopygium, g, concealed; legs not hairy ;

abdomen metallic . . .. . . . se «+ « + « + Onesia, Rob.-Desy.

PARAMINTHO, gen. nov.*

Front broad, flattened, prominent; face perpendicular, not carinated; oral margin slightly elevated; cheeks

‘broad, convex, somewhat bristly, their inferior portion equalling more than one-half of the longitudinal

diameter of the eyes; vibrisse at the oral margin and accompanied by several other bristles. Eyes bare.

Antenne short, inserted above the median line of the eyes; second joint somewhat prominent ; third joint

a little longer than the second ; arista plumose, except at ‘the end. Proboscis and palpi short ; the palpi

thin, slightly thickened towards the tip. Abdomen slender, conical; the segments of equal length ; discal

and marginal macrocheete present on the second and following segments. Legs rather long, with scattered

bristles; foot-claws and pulvilli (in the ¢) slightly elongate. Wings longer than the abdomen; small

cross-vein under the end of the first vein; third vein curved upwards in its middle; curvature of the

* rapa (next); Mintho.

BIOL. CENTR.-AMER., Dipt., Vol. II., December 1899.

266 DIPTERA.

fourth vein rectangular, without appendage, but with a faint fold in the surface of the wing ; apical

cross-vein distinctly concave ; apical cell closed (or very narrowly opened) near the tip of the wing ;

posterior cross-vein beyond the middle between the small eross-vein and the curvature of the fourth vein.

The insect for which this genus is proposed resembles various Dexine in its slender

form; but owing to the rounded shape of the anus in the male, and the plumosity of

the arista, which does not reach the end, it is perhaps best placed in the group

Sarcophagine. Prof. Brauer, who has seen the typical specimen, is of the same opinion

(see Denkschr. k. Akad. Wissensch. lviii. pp. 366, 413).

1. Paramintho modulata, sp. n., ¢. (Tab. VII. figg. 1; 1 @, head in profile.)

Grey ; three thoracic stripes, some reflecting spots on the abdomen, and the legs black ; basal joints of the

antenne rufous.

Length 7:5 millim,

Front blackish, as broad as the eyes, with a discal impression ; frontal bristles rather strong; on the vertex

two longer bristles; face and sides of the front grey, the face with brownish reflections. Basal joints of

the antenne pale rufous, the third joint black. Proboscis black ; palpi rufous, blackish towards the end.

Thorax, scutellum, and abdomen grey ; the thorax with three black stripes and long bristles ; the abdomen

with black reflecting spots, some of which form a dorsal stripe ; discal and marginal macrochete present

on the second and following segments. Legs slender, shining black, with several long bristles; tarsi as

long as the tibie ; foot-claws and pulvilli as long as the terminal tarsal joint; the pulvilli whitish.

Tegule yellowish. Wings greyish-hyaline; small cross-vein on the middle of the discal cell; apical cell

much narrowed towards the end, where it is almost closed; posterior cross-vein straight.

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smuth).

A single male specimen.

SARCOPHAGA.

Sarcophaga, Meigen, Syst. Beschr. v. p. 14 (1826).

This well-defined genus contains a very large number of species, which are spread

over the whole world. More than 400 are described: of these, about 225 are from

Europe (this number including the species belonging to Myophora, Rob.-Desv.), thirty-

four from North America (including eight from Mexico), seventy-one from South

America, twenty-six from Africa, twenty-eight from Asia (including New Guinea),

nineteen from Australasia, and eight of which the origin is doubtful, but probably

exotic. The descriptions are, unfortunately, for the greater part imperfect and do not

give the most essential characters to distinguish the apparently homogeneous forms,

and in many cases it is impossible to recognize the species intended by the authors.

For this reason 1 am compelled to describe as new the whole of the Mexican species

represented in the collections before me.

Most of the characters for distinguishing the species are to be found in the male sex

only ; and on this account I have not ventured to describe any new species on females

alone, preferring to leave unnamed for the present several females.

SARCOPHAGA., 267

The following table is based upon the species here described only :—

1. Dorso-central bristles * distinct. (Tab. VII. fig.2.) . . . . . . 2.

Dorso-central bristles absent or inconspicuous among the dense pilosity

of the thorax, at most a few longer bristles immediately before the

hind border of the thorax. (Tab. VII. fig. 10.) . . . . . . . 28

2. Some of the veins of the wings with a row of short bristlest . . . 3.

All the veins bare, or some bristles at the base of the third vein only . 22.

3. First and third veins with a row of short bristles . . 2... 0. 4 5% 0% 0"

First vein bare, the third only with a row of bristles . . . . . ll.

4. Thorax and scutellum bluish-grey; the femora and tibiz densely

clothed with long hairsinthe @ . . 6. FJ? . . «x villipes. 264

Thorax and scutellum cinereous (not bluish) ; legs not hairy (i in S. rufi-

tibia the hind tibiz only with long hairs) . 5.

5. Front on the vertex (¢) at least as broad as the eyes . 6.

Front on the vertex (¢) narrower than the eyes . oe 7.

6. Hind border of the third abdominal segment with three or four lateral

macrocheetz; hind tibize rufous, the inner side with long hairs in

thed ... woe . 2 we SOM rufitibia, 270

Hind border of the third abdominal segment with two rateral macro-

cheetee only ; legs black, the hind tibie not hairy .SfhS¢~. . vagabunda. +10

7. Wings with a distinct costal spine ; apical cell narrowly “opened 5-@3"%“acanthoptera. 2.7 |

— Costal spine of the wings very short or absent; apical cell opened as

usual. ww ee ee ee ee ee ee ee 8B

8. Abdomen yellowish-cinereous, with black spots in three rows . . . 9.

Abdomen black and grey spotted. . . . . . 10.

9. Inferior part of the cheeks equalling one- third of the ‘longitudinal

diameter of the eyes; larger species (6 millim.) . . . . 2"'"~ . wanthopyga. 7-7 |

Inferior part of the cheeks equalling one-fourth of the longitudinal

diameter of the eyes; smaller species (4-5 millim.) 4579 .""Y . . conjungens. 27-2.

10. Anal segment concolorous with the preceding segments HS-lem oe. stellata. ATU

Anal segment reddish at the hind border . . . » . «© © + + +k surrubed. 27% b Saw ~

11. Hypopygium (¢) black or greyish . . 2... ee ee ee

Hypopygium red or yellow. © «© «© © 2 ee ee ee eee WS

* Dorso-central bristles are the dorsal bristles on the thorax, arranged in longitudinal rows, usually of two

bristles before and three behind the transverse suture. See Osten Sacken, Essay on Comparative Chetotaxy,

in Trans. Ent. Soc. Lond. 1884, p. 509.

+ These short bristles, or rather bristly hairs, are very minute, though conspicuous when viewed ‘under a

lens and by turning the object in different directions. On the first vein the row of bristles is extended over

nearly the whole length of the vein, its terminal portion, which is curved upwards to the costa, alone remaining

bare. On the third vein the bristles are confined to the portion between the base and the small cross-vein,

and often do not fully reach this cross-vein. Even when a row of bristles along the veins is absent, there are

almost always some bristles at the base of the veins, especially at the base of the third vein.

2m 2

268

12.

13.

14.

15.

16.

17.

18.

19.

20.

21.

23.

24.

27.

DIPTERA.

7°

Abdomen bluish-black; antennz elongate, with strongly plumose arista. x plumigera. 275 As S we

Abdomen with cinereous and black reflecting spots; antenna normal .

Abdomen cinereous, with more or less regular black markings

Abdomen with the black colour predominating .

Posterior cross-vein in the middle between the small cross-vein and

the curvature of the fourth vein . ee

Posterior cross-vein (as usual) much nearer to the curvature of the

fourth vein cee ee ee

Hind tibie (¢) with long hairs on the inner side

Hind tibiz not hairy, with some bristles only . . -

Anal segment reddish, as well as the hypopygium of the male, and

differing in colour from the preceding segments .

Anal segment concolorous with the preceding segments, the hypopygium

only red .

Head ochraceous

Head grey or whitish. soe ee Lee ee

Third abdominal segment with three or four lateral macrochetz on

each side, placed at some distance from each other - oe

Third abdominal segment with not more than two lateral macrochete,

or if there are more present they are placed close together

Vertex (¢) less than half the breadth of the eyes

Vertex (¢) more than half the breadth of the eyes . .

Third abdominal segment only with a lateral macrocheta on each side.

Third abdominal segment with a pair of dorsal macrochete, in addition

to the lateral ones .

Inferior part of the cheeks equalling half the longitudinal diameter of

the eyes . Dee

Inferior part of the cheeks very short

. Hypepygium (¢) cinereous, small, and but little prominent .

Hypopygium () red, usually prominent .

Palpi rufous . Soe oe

Palpi black . .

Median stripe of the thorax distinetly divided : into o three lines .

Median stripe of the thorax broad, sometimes with a faint line on

each side .

. Head yellowish ; abdomen (3) conieal, cinereous, with brown reflecting

spots . .

Head whitish ; abdomen ¢ ovate, tessellated with black and ¢ grey .

. Thoracic stripes confused and but little distinct .

Thoracic stripes conspicuous as usual

Abdomen () obconical .

Abdomen ovate oe . .

Median stripe of the thorax with a . distinct Tine on each side .

Median stripe of the thorax without lateral lines .

13.

ventricosa. wy LSM

14,

diversinervis. 274 W—S mw

Susctanalis. 27 Ss be) aw

16.

17.

prevolans. “275° ‘T)S™w

setulosa. cal 6 Cm

18. :

19.

turbata. 27b ba mr’

trivialis, 274 5-8

uncata. 277 b—-6 mm

20. |

errabunda. v7 S bmw

21.

pusiola. 27 $ £ S,Soyw

debilis. 274 4ve™

Micropyga. 74 \0\S awn

23.

claripalpis. 290 4S aw

24.

25.

26.

sueta. 2%) QS ww

tridens. 1-8) ") oor

deleta, 28% 180~%

27.

tenuiventris, 28% & ™~~

oberrans. 2.8% 9 ww

29.

30.

SARCOPHAGA. 269

29. Middle and hind tibiz (3) with long hairs; anal segment ochraceous

orreddish . . . a

Legs without long hairs; anal segment tessellated with black and grey

4 ay cyte pat

triplasia. “% $3

tripartita. Lo N.S ane

like the preceding segments. . - . - + + s+ + = +

30. Middle and hind tibie (g¢) hairy on the inner side. . . . . . . Sl.

Legs not hairy. 6 6. ee ee ee BR,

31. Pilosity of the middle and hind tibiz very long and dense, and over

the whole length of the tibie . 2... - - - ee + + + + pewata, 1 8d Daa

Pilosity of the middle and hind tibiz rather short, and on the lower

half only of the tibie . 2 6 6 ee ee ee ee ee vOlucris. 265 10 mr

32. Anal segment ochraceous, the preceding segments variegated with grey

and black . . . . . oe ee eee ochripyga. % 8) aaa

Anal segment concolorous with the preceding segments . . . . . 33,

33. Black and grey stripes of the thorax equal in breadth; abdomen

tessellate . 6 0. ee ee ee BQ UATA. 2G © Sm

Black stripes of the thorax narrower than the grey interspaces ; abdomen

ochraceous, with three stripes and the incisures black . . . . . afficta. 266 Gan,

1. Sarcophaga villipes, sp.n.,¢ 9. (Tab. VII. fig. 2.)

Griseous; three thoracic stripes, some reflecting spots on the abdomen, antenne, palpi, and legs black; femora

and tibie thickly clothed with long hairs; hypopygium brownish-red.

Length 9-10 millim.

In the male sex easily recognizable by the thickly haired legs. Head in profile subquadrate ; front flattened,

on the vertex in the g as broad as, in the ? broader than, the eyes; frontal band brown, as broad as

the lateral portions, which are greyish-white and somewhat silvery, as well as the face and cheeks,

the latter on both sides of the oral margin with a brown reflection, their inferior portion equalling one-

half of the longitudinal diameter of the eyes. Antenne brownish-black, inserted on the median line of

the eyes; second joint ending in a rufous wart ; third joint three times as long as the second ; arista

long, thickened and plumose on the basal half, for the rest bare and hair-like. Proboscis and palpi black.

Thorax, scutellum, and abdomen griseous, the thorax and scutellum with a slight bluish tinge; thorax

with three broad black bands, the median band prolonged over the scutellum and before the transverse

suture divided into three stripes, the two lateral of which are linear; dorso-central bristles distinct.

Abdomen elliptical (¢) or ovate and convex (Q ), with brown or blackish reflecting spots; hind border

of the third segment with six macrochete—two dorsal and two on each side; fourth segment with a

continuous row of marginal macrochete; hypopygium brownish-red, densely haired. Legs black: inthe

3 the femora beneath and the tibie on the inner side densely clothed with long hairs in two divergent

rows ; the foot-claws long, and the pulvilli quadrate, brown ; legs in the 9 with bristles only, and the

foot-elaws and pulvilli short. Tegule white. Wings greyish-hyaline ; first and third veins with a row of

small bristles ; small cross-vein under the middle or a little beyond the middle of the mediastinal cell and

on the middle of the discal cell; curvature of the fourth vein with an acute angle; apical cross-vein

incurved near its base, for the rest straight; posterior cross-vein undulate.

- Hab. Mextco, Northern Sonora (Morrison), Omilteme 8000 feet and Amula 6000

feet, both in Guerrero (H. H. Smith).

One male and four female specimens.

270 DIPTERA.

2. Sarcophaga rufitibia, sp. n., ¢. (Tab. VII. figg. 3, middle leg ; 3 a, hind

leg.)

Cinereous ; frontal band, thoracic stripes, and reflecting spots on the abdomen blackish-brown ; hind border

of the anal segment and hypopygium red; antenns, palpi, and legs black, the hind tibie reddish and

with long hairs on the inner side; first and third veins bristly.

Length 8 millim.

Head whitish-cinereous ; front as broad as the eyes, with parallel borders ; frontal band blackish, as broad as

the lateral portions; lower part of the cheeks scarcely equalling one-fourth of the longitudinal diameter of

the eyes. Antenne inserted on the median line of the eyes; third joint three times as long as the second,

its base usually somewhat rufous. Proboscis and palpi black. Thorax, scutellum, and abdomen cinereous ;

the thorax with three blackish stripes, the median stripe narrower than the lateral ones; dorso-central

bristles distinct. Abdomen elliptical, with blackish-brown and whitish reflecting spots and a black dorsal

stripe; anal segment red, anteriorly with whitish-grey and sometimes also with blackish reflections ;

hind borders of the third and anal segments with a row of rather strong macrochete ; hypopygium

moderately prominent, red, with some whitish reflections. Legs black; front femora greyish outwardly,

the knees rufous; intermediate tibie (Tab. VII. fig. 3) piceous, on the outer side with two weak

bristles, on the inner side with short hairs and a single bristle; hind tibie (Tab. VII. fig. 3 a) rufous, on

the inner side densely clothed with long hairs and a strong bristle, on the outer side with some long

bristles. Tegule whitish. Wings greyish-hyaline ; first and third veins with a row of short bristles ;

small cross-vein under the end of the first vein and on the middle of the discal cell; curvature of the

fourth vein rectangular ; apical cross-vein concave; posterior cross-vein nearly straight.

Hab. Mexico, Amula in Guerrero 6000 feet (Hl. H. Smith).

Four male specimens.

3. Sarcophaga vagabunda, sp.n., ¢ 2. (Tab. VII. fig. 4, middle leg.)

Cinereous ; three thoracic stripes, reflecting spots on the abdomen, palpi, and legs black; basal joints of the

antenne rufous ; head yellowish; hypopygium red; first and third veins bristly.

Length 5-7°5 millim.

Head pale yellow or whitish, with brown and blackish reflections ; front in both sexes broader than the eyes,

in the male slightly prominent ; frontal band blackish, broad; lower part of the cheeks equalling one-

third or nearly one-half of the longitudinal diameter of the eyes. Antenne inserted above the median

line of the eyes ; basal joints, or at least the second joint, rufous; third joint black, three times as long

as the second. fProboscis and palpi black. Thorax, scutellum, and abdomen cinereous; thorax with

distinct dorso-central bristles and with three blackish stripes, the median stripe prolonged over the

scutellum and usually with a dark line on each side before the transverse suture. Abdomen elliptical

(d) or ovate (@ ), with blackish reflecting spots, which often appear in three rows, the median forming

a dorsal stripe; hind border of the third segment with two dorsal and on each side two lateral macro-

chaste ; hind border of the anal segment with a continuous row of macrochete ; hypopygium large, pale

red, its first segment often greyish-white, sometimes with dark reflections. Legs black ; tibize not hairy,

the middle pair with two bristles on the outer side. Tegule white or slightly yellowish. Wings greyish-

hyaline, usually with a small costal spine; the first and third veins with a row of short bristles ; small

cross-vein under the end of the first vein and on the middle of the discal cell ; apical cross-vein concave ;

posterior cross-vein straight (in the female specimen slightly curved).

Hab. Mexico, Mexico city, Cuernavaca in Morelos, Amula 6000 feet and Xucu-

manatlan 7000 feet, both in Guerrero, Atoyac in Vera Cruz (H. H. Smith), Orizaba

(HH. H, Smith and F. D. Godman).

Several males and a single female.

SARCOPHAGA. 271

4. Sarcophaga acanthoptera, sp. n., ¢ 2. (Tab. VII. fig. 5, wing.)

Cinereous ; frontal band, three thoracic stripes, large reflecting spots on the abdomen, antenna, palpi, and legs

black ; hind border of the anal segment and hypopygium red; wings with a costal spine; first and third

veins with short bristles; apical cell narrowly opened.

Length 5-6°5 millim.

Head whitish, somewhat silvery ; front a little narrower than the eyes ('), at least as broad as the eyes ( ¢ );

frontal band black, narrower than the lateral portions ; lower part of the cheeks equalling one-fourth of

the longitudinal diameter of the eyes. Antenne black, inserted above the median line of the eyes; third

joint three times as long as the second. Proboscis and palpi black. Thorax and scutellum cinereous:

the thorax with three black stripes of equal breadth; dorso-central bristles distinct. Abdomen: (¢)

elliptical, the first three segments black, with greyish reflecting spots, chiefly at the front borders, the

anal segment anteriorly with grey and blackish spots, posteriorly red, and the hypopygium red; ( @ )

elongate oval, cinereous, with brown reflecting spots, the anus obscure reddish, and the third and anal

segments with erect macrochets at the hind borders (in the single male specimen the macrochetex are

broken off). Legs black ; front femora outwardly greyish; tibie not hairy in the ¢. Tegule whitish.

Wings greyish-hyaline ; costa at the base to beyond the humeral cross-vein with bristles and with a

distinct costal spine; first and third veins with a row of bristles ; small cross-vein under the end of the

first vein and on the middle of the discal cell; apical cell, at least in the ¢, very narrowly opened ;

apical cross-vein concave ; posterior cross-vein straight.

Hab. Mexico, Amula in Guerrero 6000 feet, Atoyac in Vera Cruz, Teapa in Tabasco

(H. H, Smith).

One male and three female specimens.

5. Sarcophaga xanthopyga, sp.n., ¢ ¢.

Yellowish-cinereous ; three thoracic stripes, reflecting spots in three rows on the abdomen, antenna, palpi,

and legs black; lower part of the cheeks equalling one-third of the longitudinal diameter of the eyes;

hypopygium ochraceous ; first and third veins bristly.

Length 6 millim. .

Front flattened, slightly prominent, on the vertex narrower (¢) or broader (2) than the eyes, enlarged

downwards ; frontal band blackish-brown, broader than the lateral portions, these, as well as the cheeks,

yellowish or ochraceous, with brown reflections; inferior part of the cheeks equalling one-third of the

longitudinal diameter of the eyes. Antenne black, inserted a little above the median line of the eyes ;

the basal joints, or at least the second joint, often rufous; arista strongly plumose for two-thirds of its

length. Proboscis and palpi black. Thorax and scutellum cinereous ; the thorax with distinct dorso-central

bristles and with three black stripes, the median stripe prolonged over the scutellum, and with traces of a

dark line on each side. Abdomen elliptical (¢), ovate (2), yellowish-cinereous, with black reflecting

spots, which are arranged in three rows ; hind border of the third segment with two macrochete in the

g, and with a row of small depressed bristles in the @ ; hind border of the anal segment with a row of

macrochete in both sexes; hypopygium (<¢) small, reddish-ochraceous; the anus in the 9 also

reddish. Legs black, the middle and hind tibie piceous or even somewhat reddish, not hairy, but with

some scattered bristles. Tegule whitish. Wings greyish-hyaline ; first vein bristly on the basal half;

third vein bristly to near the small cross-vein ; the cross-vein under the end of the first vein and on the

middle ofthe discal cell; apical cross-vein incurved at one-third of its length ; posterior cross-vein very

slightly undulate, sometimes nearly straight.

Hab. Mexico, Amula 6000 feet and La Venta 300 feet, both in Guerrero, Cuernavaca

in Morelos (H. H. Smith), Orizaba (FP. D. Godman and H. H. Smith).

Several specimens of both sexes.

The male of this species agrees with the corresponding sex of JS. rufitibia in the

272 DIPTERA.

reddish colour of the hind tibiz, but differs from it in the narrower front and in the

absence of long hairs on the tibie.

6. Sarcophaga conjungens, sp. n., ¢.

Yellowish-cinereous ; three thoracic stripes, reflecting spots in three rows on the abdomen, palpi, and legs

black ; lower part of the cheeks equalling one-fourth of the longitudinal diameter of the eyes ; hypopygium

reddish ; first and third veins bristly.

Length 45-5 millim.

Front flattened, not prominent, on the vertex narrower than the eyes, its lateral portions, as well as the cheeks,

white ; frontal band brown; inferior part of the cheeks equalling one-fourth of the longitudinal diameter

of the eyes. Antenne brown, inserted on the median line of the eyes; arista plumose on its basal half.

Proboscis and palpi black. Thorax and scutellum cinereous; thorax with three blackish stripes, the

median stripe prolonged over the scutellum, and with some traces of a dark line before the transverse

suture between the median and lateral stripes; dorso-central bristles distinct. Abdomen elliptical,

yellowish-cinereous, with blackish reflecting spots arranged in three rows; anal segment with a row of

marginal macrochete ; hypopygium yellowish-red. Legs black, the tibiae somewhat piceous ; bind tibie

not hairy, with some bristles only. Tegule yellowish-white. Wings greyish-hyaline; first and third

veins with a row of short: bristles, those of the third vein very minute, conspicuous only when viewed

under a strong lens; small cross-vein under the end of the first vein and on the middle of the discal cell ;

curvature of the fourth vein rectangular ; apical and posterior cross-veins slightly curved.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith), Orizaba (H. H. Smith and F. D.

Godman).

Two male specimens.

This species agrees in most of its characters with the preceding, but it is smaller and

the eyes descend lower.

7. Sarcophaga stellata, sp.n., 3 9.

Greyish ; frontal band, three thoracic stripes, antenne, palpi, and legs black; abdomen brownish-black, with

grey reflecting spots; hypopygium red; first and third veins bristly.

Length 4°5-6 millim.

Head whitish-grey, in some specimens with a yellowish tinge; front on the vertex a little narrower than the

eyes (¢), as broad as the eyes (2); frontal band black, in the § narrower, in the 2 broader, than the

lateral portions ; lower part of the cheeks equalling one-third to one-fourth of the longitudinal diameter

of the eyes. Antenne black, inserted above the median line of the eyes; third joint three times as long

as the second ; arista strongly plumose for two-thirds of its length. Proboscis and palpi black, the palpi

slightly thickened towards their tip. Thorax and scutellum greyish ; thorax with distinct dorso-central

bristles, and with three broad black or blackish stripes, the median stripe prolonged over the scutellum.

Abdomen: (<) elliptical, black or brownish-black, with whitish-grey reflecting spots, sometimes with a

black dorsal stripe and narrow black hind borders to the segments, the hypopygium small, red, somewhat

shining; (@) ovate, cinereous, with brown reflecting spots and black spots in three rows, the anus

yellowish-rufous ; (¢ 2) the hind border of the third segment with a pair of erect macrochete in the

middle, and two lateral macrochetz on each side, and the anal segment with a row of marginal macro-

chete. Legs black; middle and hind tibie with scattered bristles, which, especially in the male, are

long and stout. Tegule yellowish-white. Wings greyish-hyaline, in some specimens with a short costal

spine ; first and third veins with a row of small bristles ; small cross-vein under or beyond the middle of

the mediastinal cell and on the middle of the discal cell ; curvature of the fourth vein rectangular ; apical

cross-vein concave ; posterior cross-vein slightly undulate or nearly straight.

Hab. Mexico, Tierra Colorada 2000 feet, Xucumanatlan 7000 feet, Amula 6000 feet,

SARCOPHAGA. 273

and Omilteme 8000 feet, all in Guerrero, Atoyac in Vera Cruz, Teapa in Tabasco

(H. H. Smith). . .

Eight male and four female specimens.

8. Sarcophaga surrubea, sp. n., ¢.

Greyish; frontal band, three thoracic stripes, antennz, palpi, and legs black; abdomen black, with grey

reflecting spots ; hind border of the anal segment, as well as the hypopygium, red; first and third veins

bristly.

Length 6-5 millim.

Closely allied to S. stellata, and in most of its characters agreeing with it; but slightly larger, and with the

head more yellowish, the front narrower (on the vertex nearly half as broad as the eyes), the antennz

inserted on or even a little beneath the median line of the eyes, the hind border of the anal segment

reddish, and the wings without costal spine.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single male specimen. ‘This insect is perhaps nothing more than a variety of

S. stellata.

9. Sarcophaga plumigera, sp. n, ¢ 2. (Tab. VII. figs. 6; 6a, head. in

profile. )

Head ochraceous ; thorax cinereous, with three black stripes; abdomen, including the hypopygium, bluish-

black; antenne black, elongate, with strongly plumose arista.

Length 9°5 millim.

The front on the vertex in the ¢ much narrower than the eyes, gradually enlarging downwards, and, as well

as the face and cheeks, brightly ochraceous ; in the 9 the head is yellowish, the front is less narrow

above and with more parallel sides, and the frontal band is black and narrower than the lateral portions.

The frontal bristles in the 9 are strong, especially the two pairs of orbital bristles (which are absent in

the ¢) and the posterior pair of the bristles on the vertex. Lower part of the cheeks equalling one-fifth

(3) or one-fourth (2) of the longitudinal diameter of the eyes; tucial ridges with a row of bristles.

Antenne black, long and slender, inserted above the median line of the eyes; third joint five times as

long as the second ; arista long, strongly plumose nearly to the end. Proboscis brown, its terminal lips

with yellow hairs; palpi black, slightly enlarged towards the end. Thorax cinereous, with three well-

defined broad black stripes and with distinct dorso-central bristles. Scutellum cinereous, with black

disc. Abdomen elliptical (3), ovate (2), black ; the second and following segments with a bluish-grey

tomentum, which is most conspicuous on their front borders; sometimes a black dorsal stripe is visible ;

the two posterior segments with strong marginal macrochete; hypopygium black, with bluish-grey

tomentum. Legs black; front femora on the outer side greyish ; hind tibise piceous; in the ¢ the legs

are somewhat hairy, and the tibiz have scattered bristles, which aiso are present in the 9; foot-claws

and pulvilli elongate in the g, the pulvilli brown. Tegule whitish. Wings greyish-hyaline: small

cross-vein nearly under the end of the first vein and on the mindle of the discal cell; third vein with a

row of short bristles from the base halfway to the small cross-vein ; last section of the third vein curved ;

apical cross-vein arcuate ; posterior cross-vein slightly undulate.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

‘Three male and two female specimens. ‘This species is a very distinct one.

BIOL. CENTR.-AMER., Dipt., Vol. I1., January 1896. on

274 _* DIPTERA.

10. Sarcophaga ventricosa, sp. n., 3. |

Cinereous ; frontal band, three stripes on the thorax and abdomen, antenne, palpi, and legs black ; hypopygium

yellowish-cinereous ; third vein bristly.

Length 6°5 millim.

Head pale ochraceous; front flattened, on the vertex half a as broad as the eyes; frontal band blackish, broader

than the lateral portions ; lower part of the cheeks equalling one-fourth of the longitudinal diameter of

the eyes. Antenne black, inserted on the median line of the eyes; third joint three times as long as the

second. Proboscis and palpi black, the palpi slightly thickened towards the end. Thorax and scutellum

cinereous ; thorax with three black stripes, the median stripe prolonged over the scutellum ; dorso-central

bristles present. Abdomen elliptical, cinereous or yellowish-cinereous, with three black stripes, interrupted

by the narrow hind borders of the segments ; hypopygium small, similar in colour to the abdomen ; hind

borders of the third and anal segments with erect macrochete. Legs black ; tibiee with scattered bristles,

* without hairs. Tegulee greyish-yellow. Wings greyish-hyaline; third vein with a row of short bristles ;

staall cross-vein under the end of the first vein and a little beyond the middle of the discal cell; curvature

of the fourth vein rectangular, the distal portion of this vein (from the posterior cross-vein to the curvature)

about two-fifths of the penultimate portion ; apical cross-vein concave; posterior cross-vein nearly straight.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet, Teapa in Tabasco (H. H. Smith).

Two male specimens.

11. Sarcophaga diversinervis, sp.n., ¢ 9. (Tab. VII. fig. 7, wing.)

Cinereous ; frontal band, three thoracic stripes, large reflecting spots on the abdomen, antenne, palpi, and

legs black ; hypopygium piceous ; third vein bristly ; distal portion of the fourth vein as long as the

penultimate portion. |

Length 4-5 millim.

Head yellowish-white, with brown reflections; front of the ¢ on the vertex half as broad as the eyes,

enlarged downwards, that of the ? broader than the eyes, with parallel sides; frontal band black, in the

¢ broader, in the 2 narrower, than the lateral portions ; lower part of the cheeks equalling one-fifth of

the longitudinal diameter of the eyes. Antenne black, inserted on the median line of the eyes; third

joint three times as long as the second; arista plumose to near the tip. Proboscis and palpi black, the

palpi slightly enlarged towards the tip. Thorax, scutellum, and abdomen cinereous; thorax with three

broad black ( g) or brown (@) stripes; dorso-central bristles distinct; scutellum with a more or less

extended black spot on the disc. Abdomen: (¢) elliptical, brownish-black with a slight cupreous tinge,

and with cinereous reflecting spots, chiefly on the front borders of the segments, the hypopygium piceous ;

(2) ovate, cinereous, the first segment black, the following segments with broad black hind borders and

blackish reflecting spots ; in both sexes the third and anal segments with marginal macrochete. Legs

black ; coxw and the underside of the femora grey ; tibiee with scattered bristles, the hind pair without

hairs; foot-claws and pulvilli elongate in the ¢. Tegulw yellowish. Wings brownish (3) or greyish

(2); third vein with a row of bristles ; small cross-vein under the end of the first vein and on the

middle or a little beyond the middle of the discal cell; curvature of the fourth vein rectangular ; posterior

cross-vein less oblique than the apical cross-vein, on account of which the distal and the penultimate

portions of the fourth vein (before its curvature) are of equal length ; apical cell somewhat curved upwards

near its end and opened at a short distance from the tip of the wing (3 ), or issuing in the tip (2);

cross-vein concave; posterior cross-vein straight.

Hab. Mexico, Teapa in Tabasco (IZ. H. Smith).

apical

One male and one female. This species is at once recognizable by the peculiar

position of the posterior cross-vein. It seems to be very nearly allied to the following,

S. fuscianalis, but differs from it in its somewhat inferior size and in having the eyes

more descending, as well as in the neuration of the wings.

SARCOPHAGA. 275

12. Sarcophaga fuscianalis, sp.n:, 3 2.—

Cinereous ; frontal band, three thoracic stripes, large reflecting spots on the abdomen, antenne, palpi, and legs

black ; hypopygium piceous; third vein bristly ; distal portion of the fourth vein shorter than the penul-

timate portion.

Length 6-7 millim.

Head pale ochraceous or whitish, usually with brown reflections ; front of the ¢ on the vertex half as broad

_ as the eyes, enlarged downwards, that of the 9 a little broader than the eyes, with parallel sides; frontal

band blackish, slightly broader than the lateral portions; inferior part of the cheeks equalling one-fourth

of the longitudinal diameter of the eyes. Antennee black, inserted on or a little beneath the median line

of the eyes; third joint fully three times as long as the second; arista rather long-plumose to near the

tip. Proboscis and palpi black, the palpi cylindrical. Thorax, scutellum, and abdomen cinereous ; thorax

with long dorso-central bristles and with three black stripes, the median stripe pointed in front and pro-

‘longed over the scutellum. Abdomen elliptical (¢) or ovate (2), with large black reflecting spots,

which sometimes appear in three rows, the sides with a slight cupreous tinge ; hypopygium of the ¢

small, piceous; hind borders of the third and anal segments with strong and erect macrochete. Legs

black ; front femora outwardly greyish ; middle tibiz of the g¢ with a bristle on the outer side, and with

short hairs on the inner side from beyond the middle to the apex; hind tibie with scattered bristles.

Tegule yellowish-white. Wings with a brownish-grey tinge; third vein with a row of short bristles

from the base to beyond half the small cross-vein ; this cross-vein under the end of the first vein and on

the middle of the discal cell; curvature of the fourth vein rectangular, the distal portion of that vein

(before the curvature), as usual, much shorter than the penultimate portion; apical cross-vein arcuated ;

posterior cross-vein slightly undulate or nearly straight.

Hab. Mexico, Atoyac and Medellin in Vera Cruz, Teapa in ‘Tabasco (H. H. Smith).

Several males and one female.

13. Sarcophaga pravolans, sp.n. 3 ¢@. (Lab. VII. figg. 8; 8a, head in

profile.)

Cinereous ; three thoracic stripes, reflecting spots on the abdomen, antenne, palpi, and legs black ; anal seg-

ment and hypopygium red ; hind tibie hairy in the ¢; third vein bristly.

Length 7°5 millim.

Head ochraceous; front flattened, somewhat prominent, longer than the face; the vertex in the ¢ half as

broad as the eyes and almost entirely occupied by the brown frontal band, in the ? as broad as the eyes,

and with the black frontal band as broad as the lateral portions ; cheeks with brown reflections and some

pilosity, their lower part greyish and equalling one-third of the longitudinal diameter of the eyes.

Antenne black, inserted on the median line of the eyes; third joint two and one-half times as long as the

second. Proboscis and palpi black. Thorax cinereous, with three black stripes, and a black line on

each side of the median stripe; dorso-central bristles distinct. Scutellum black, laterally and on the

hind border cinereous. Abdomen elliptical (¢) or ovate (@); the first three segments cinereous, with

black reflecting spots, which sometimes appear in three rows; anal segment red, with ochraceous

reflections ; hypopygium of the ¢ red; hind borders of the last two segments with macrochete. Legs

shining black; in the ¢ the tip of the coxe rufous; middle and hind tibie piceous; the hind tibic

slightly curved, with long and rough hairs on the inner side, and with some strong bristles on the outer

side. Tegule yellowish-white. Wings greyish-hyaline ; third vein with a row of short bristles; small

cross-vein infuscate, under the end of the first vein and on the middle of the discal cell; curvature of the

fourth vein with an acute angle; apical cross-vein distinctly incurved in its proximal third ; posterior

cross-vein undulate.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (1. H. Smith), Orizaba (H. H.

Smith and F. D. Godman).

Two males and one female.

276 DIPTERA.

14. Sarcophaga setulosa, sp. n., ¢. |

Whitish-grey ; frontal band, three broad thoracic stripes, large reflecting spots on the abdomen, antenne, palpi,

and legs black ; hypopygium red; hind tibie hairy; third vein bristly.

Length 6 millim.

The large extension of the black markings gives this species a dark aspect: the three black stripes on the thorax

are broad and somewhat diffused; the scutellum is almost wholly black; and the abdomen appears to be

shining black, sometimes with well-defined white or even silvery reflecting spots. Head yellowish, with

brown reflections; front on the vertex half as broad as the eyes; frontal band broad, blackish; cheeks

slightly hairy, their lower part grey and equalling one-fourth of the longitudinal diameter of the eyes.

Antenne black, inserted on the median line of the eyes; third joint two and one-half times as long as the

second. Proboscis and palpi black. Thorax with distinct dorso-central bristles. Abdomen elliptical ;

the hind borders of the last two segments with macrochete; hypopygium red. Legs black; front coxte

with greyish-white reflections; middle and hind tibie piceous; hind tibie nearly straight, with long

hairs on the inner side, and with very short hairs and some long bristles on the outer side. Tegule

whitish. Wings greyish-hyaline ; third vein with a row of short bristles ; small cross-vein thick, under

the end of the first vein and on the middle of the discal cell; curvature of the fourth vein with an acute

angle; apical cross-vein incurved in its proximal third; posterior cross-vein slightly undulate.

Hab. Mexico, Ciudad in Durango 8100 feet (forrer).

A single male specimen.

15. Sarcophaga turbata, sp. n., ¢ 2.

_ Cinereous; head and last abdominal segments ochraceous; three thoracic stripes, reflecting spots on the

abdomen, antenne, palpi, and legs black; hypopygium red; third abdominal segment with four lateral

macrocheete on each side; third vein bristly,

Length 8-9 millim.

Front slightly prominent, in the g half as broad on the vertex as the eyes, in the @ as broad as the eyes;

frontal band as broad as the lateral portions, black, but sometimes appearing more or less ochraceous;

frontal bristles strong, erect; cheeks and sides of the front ochraceous, with brown reflections; oral

margin cinereous, somewhat prominent ; lower part of the cheeks equalling one-third of the longitudinal

diameter of the eyes. Antenne black, inserted on the median line of the eyes; third joint two and one-

half times as long as the second; arista plumose nearly to the tip. Proboscis and palpi black, the palpi

hairy. Thorax cinereous, with three broad black stripes; dorso-central bristles distinct. Scutellum

black, laterally and posteriorly cinereous. Abdomen in both sexes ovate. In the ¢ the first segment

black, with cinereous sides; the second segment cinereous, with black reflecting spots, the sides tinged

with ochraceous ; the third and anal segments ochraceous, with brown reflecting spots; a black dorsal

stripe extends over the second and third segments, and, more narrowly, over the anal segment; hypo-

pygium red, rather small. In the 9? the ochraceous tinge is much paler and more confined to the anal

segment; the dorsal stripe is less conspicuous; the hind borders of the last two segments have erect

macrocheete ; and on the third segment, beside the two dorsal ones, there are on each side four lateral

macrocheetee. Legs black, the tibie short-haired and with scattered bristles. Tegule whitish. Wings

greyish-hyaline; third vein with short bristles; small cross-vein a little before the middle of the discal

cell ; curvature of the fourth vein with an acute angle ( ) or rectangular (?); apical cross-vein concave ;

posterior cross-vein nearly or quite straight.

Hab. Mexico, Chilpancingo 4600 feet and Amula 6000 feet, both in Guerrero,

Teapa in Tabasco (H. H. Smith), Orizaba (H. H. Smith and F. D. Godman).

One male and four female specimens.

SARCOPHAGA. 277

16. Sarcophaga trivialis, sp.n., 3 ¢.

Cinereous ; head ochraceous; three thoracic stripes, reflecting spots on the abdomen, antenne, palpi, and legs

black ; third abdominal segment on each side with two lateral macrochete; hypopygium red; third

vein bristly.

Length 5-8:5 millim.

Head ochraceous, with reddish or brown reflections; front flattened, slightly prominent, as long as the face,

on the vertex in the ¢ half as broad, in the ? as broad, as the eyes; frontal band blackish, as broad as

the lateral portions; lower part of the cheeks equalling one-third to one-fourth of the longitudinal

diameter of the eyes. Antenne black, inserted nearly on the median line of the eyes; third joint three

times as long as the second ; arista plumose from the base to two-thirds of its length. Proboscis and

palpi black, the palpi slightly thickened towards the tip. Thorax and scutellum cinereous, often with a

yellowish tinge; thorax with three black stripes, the median stripe prolonged over the scutellum and, on

each side, before the transverse suture, with a more or less conspicuous narrow brown line; dorso-central

bristles distinct. Abdomen elliptical ( ¢) or ovate (); its ground-colour cinereous, but often becoming

more or less ochraceous towards the apex; the brown or black reflecting spots sometimes appearing in

three rows, but usually more irregular; hind border of the third segment with two dorsal and on each

side two lateral macrochete; hind border of the anal segment with a continuous row of macrochete ;

hypopygium of the § yellowish-red, prominent; anus of the 9 likewise reddish ; in some specimens

(d 2) the anal segment is ochraceous and the reflecting spots on it are reddish. Legs black, the hind

tibise sometimes piceous ; the latter in some specimens very slightly curved, in others straight, and. with

scattered bristles on their outer side; foot-claws and pulvilli somewhat elongate in the ¢. Tegule

white, usually with a yellowish tinge. Wings greyish-hyaline; third vein with short bristles; small

cross-vein under the end of the first vein and on the middle of the discal cell ; curvature of the fourth

vein nearly rectangular, in some specimens with a rather more acute angle; apical cross-vein concave ;

posterior cross-vein slightly undulate.

Hab. Mexico, Tierra Colorada 2000 feet, Amula 6000 feet, and Xucumanatlan

7000 feet, all in Guerrero, Cuernavaca in Morelos, Atoyac in Vera Cruz, Teapa in

Tabasco (H. H. Smith), Orizaba (H. H. Smith and F. D. Godman).

Several specimens of both sexes. ‘They differ greatly in size and in the intensity of

the ochraceous colour on the head and abdomen. In some of them, especially the

males, the hind tibie are slightly, but conspicuously, curved ; but all these differences

show transitions, proving that the species is a variable one.

S. trivialis is allied to S. turbata, but differs from it in the position of the macro-

cheete of the third abdominal segment, the two lateral ones being placed close together

and widely removed from the two dorsal, while in S. turdata the four lateral macro-

cheetee are at some distance from each other, and form with the two dorsal a nearly

complete row.

17. Sarcophaga uncata, sp. n., ¢.

Cinereous ; frontal band, thoracic stripes, reflecting spots (in three rows) on the abdomen, antenne, palpi, and

legs black ; hypopygium red ; vertex less than half the breadth of the eyes; third vein bristly.

Length 6-8 millim.

Head whitish-cinereous ; front on the vertex less than half the breadth of the eyes; frontal band black; lower

part of the cheeks equalling one-third of the longitudinal diameter of the eyes. Antenne black, inserted

a little above the median line of the eyes; third joint twice as long as the second, at the extreme base

rufous. Proboscis black, with brown terminal lips; palpi black, cylindrical, short-haired. Thorax,

scutellum, and abdomen cinereous; the two lateral stripes of the thorax broad, the median stripe

278 . DIPTERA.

consisting of three lines; dorso-central bristles distinct ; scutellum at the base and on the dise black.

Abdomen ovate ; first segment almost wholly black; the following segments with black reflecting spots,

arranged in three rows and thus forming a dorsal and two lateral stripes; hypopygium small,.red; hind

borders of the third and anal segments with a row of macrochete. Legs black, with scattered bristles.

Tegule yellowish-white. Wings greyish-hyaline; small cross-vein under the end of the first vein and on

the middle of the diseal cell; third vein with a row of short bristles, ending before the small cross-vein ;

curvature of the fourth vein rectangular; apical cross-vein incurved in its proximal third, the posterior

cross-vein distinctly undulate, both oblique and somewhat distant from the hind borders of the wings.

Hab. Mexico, Chilpancingo 4600 feet and Amula 6000 feet, both in Guerrero

(H. H. Smith), Northern Yucatan (Gawmer).

Three male specimens.

18. Sarcophaga errabunda, sp.n., 3.

Cinereous ; frontal band, three thoracic stripes, reflecting spots on the abdomen, palpi, and legs black; hypo-

pygium red; vertex more than half the breadth of the eyes; third vein bristly.

Long. 6 millim.

Closely allied to S. uncata, but differing from it in the broader front: in the ¢ (the only sex known of either

species) it is more than half the breadth of the eyes. The median stripe of the thorax is not divided into

three lines, though it is drawn out in a point in front, and sometimes on each side traces of lateral lines

are visible. The abdomen is proportionately longer and more elliptical. The wings often show a

short costal spine.

Hab. Mexico, Rincon 2800 feet, Chilpancingo 4600 feet, and Amula 6000 feet, all

in Guerrero, Teapa in Tabasco (H. H. Smith).

Seven male specimens.

19. Sarcophaga pusiola, sp. n., ¢ ¢.

Cinereous ; frontal band, thoracic stripes, and reflecting spots on the abdomen blackish ; antenna, palpi, and

legs black, the basal joints of the antenne partly rufous; hypopygium red, its first segment cinereous ;

front broad ( ¢ ).

Length 4:5-6°5 millim.

Front flattened, somewhat prominent, in both sexes broader than the eyes; frontal band blackish, much

broader than the lateral portions, which are whitish or yellowish-white, with brown reflections, as well as

the face and cheeks; oral margin slightly rufous ; lower part of the cheeks cinereous, equalling one-half

of the longitudinal diameter of the eyes. Antenne inserted above the median line of the eyes; basal

joints, or at least the second joint, rufous ; third joint black, two and one-half times as long as the second ;

arista plumose onits basal half. Proboscis and palpi black. Thorax, scutellum, and abdomen cinereous ;

thorax with three blackish stripes, the median stripe prolonged over the scutellum; in the ¢ the median

stripe has on each side a dark line, which in the ? is absent or scarcely visible; dorso-central bristles

distinct. Abdomen elliptical (¢) or ovate (2), with blackish-brown reflecting spots; hind borders of

the third and the ana] segments with erect macrochete; hypopygium of the g red, shining, its first

segment cinereous, with brown reflections ; anus of the 2 reddish. Legs black, with some scattered

bristles. Tegule yellowish-grey. Wings greyish-hyaline; third vein with some short bristles; small

cross-vein under the end of the first vein and on the middle of the discal cell; curvature of the fourth

vein rectangular ; apical cross-vein slightly incurved ; posterior cross-vein nearly straight.

Hab. Mexico, Tepetlapa in Guerrero 3000 feet, Mexico city (HZ. H. Smith), Orizaba

(H. H. Smith and F. D. Godman).

SARCOPHAGA. 279

A male and three female specimens. ‘his species also much resembles S. uncata,

but it is smaller. The front is more prominent and still broader (in the ¢') than that

of S. errabunda; the eyes also are less descending. :

20. Sarcophaga debilis, sp.n. ¢ 9. (Tab. VII. fig. 9.)

Grey; frontal band, three thoracic stripes, reflecting spots on the abdomen, antenne, palpi, and legs black ;

hypopygium small, red; third vein bristly.

Length 4 millim.

Head whitish-grey ; front of the $ narrower, that of the @ a little broader, than the eyes; frontal band

- black, narrow; inferior part of the cheeks very short, scarcely equalling one-fifth or one-sixth of the

longitudinal diameter of the eyes. Antenne black, inserted above the median line of the eyes; third

joint twice as long as the second. Proboscis and palpi black. Thorax and scutellum greyish-cinereous ;

thoracic dorsum with three black stripes, the median stripe prolonged over the scutellum ; dorso-central

bristles present. Abdomen elliptical ( ¢) or ovate (@ ), cinereous, with brownish-black reflecting spots ;

hind borders of the third and anal segments with strong erect macrochete; hypopygium of the ¢ little

prominent, brownish-red; anus of the 9 of the same colour. Legs black; tibie with scattered bristles ;

front tarsi of the ¢ slender at the base, but gradually a little broader towards the tip. Tegule whitish.

Wings greyish-hyaline ; third vein bristly, its terminal portion nearly straight; small cross-vein on the

middle of the discal cell; apical cell triangular; posterior cross-vein straight.

Hab. Mexico, Amula in Guerrero 6000 feet, Atoyacin Vera Cruz, Teapa in Tabasco

(H. H, Smith).

A male and four female specimens. In its small size, the feeble development of the

male hypopygium, and the venation of the wings (the veins being almost straight) this

species has much affinity with the genus Sarcophagula, but differs from it in the narrow

front and the absence of orbital bristles in the male.

21. Sarcophaga micropyga, sp.n., ¢ (9%).

Yellowish-cinereous ; frontal band, three thoracic stripes, and reflecting spots on the abdomen blackish-brown ;

palpi and legs black; hypopygium small, cinereous ; veins not bristly.

Length 10°5 millim.

Front slightly prominent, as broad as the eyes, yellowish-cinereous with brown reflections, as well as the face

and cheeks; frontal band black or blackish-brown, as broad as the lateral portions ; lower part of the

-cheeks equalling one-half of the longitudinal diameter of the eyes. Antenne blackish-brown, inserted

beneath the median line of the eyes; second joint somewhat elevated, third joint narrow, three times as

long as the second, rufous at the base; arista plumose nearly to the end. Proboscis and palpi black,

the palpi cylindrical, hairy. Thorax, scutellum, and abdomen yellowish-cinereous ; thorax with three

brown stripes, the median stripe prolonged over the scutellum; dorso-central bristles very distinct.

Abdomen elliptical, with brown reflecting spots, the darkest of which form three rows; hind borders of

the third and anal segments with a row of macrochexte ; hypopygium cinereous, small, and little prominent.

Legs black ; front femora rufous at the tip; all the femora on the underside, and the hind tibie on the

inner side, hairy. Tegule greyish-white, with a pale yellow margin. Wings greyish-hyaline; on the

veins no short bristles, as are visible in all the preceding species; small cross-vein under the end of the

first vein and on the middle of the discal cell; curvature of the fourth vein with an acute angle; apical

cross-vein incurred ; posterior cross-vein nearly straight.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

Six male specimens. Four of them agree zmter se in all the above-mentioned

characters ; a single specimen, however, differs from them in having a much narrower

280 ‘DIPTERA.

front (scarcely one-half the breadth of the eyes) and also in the absence of hairs on the

inner side of the hind tibie. On account of these important differences I should be

inclined to consider this latter as belonging to a distinct species, if it were not that

another specimen evidently showed a transition in both these characters, that is, in

having the front narrower than in the type (but broader than in the first-mentioned

example) and the hind tibie slightly hairy. For the rest, both these specimens agree

in their general habitus, colour, and markings with the typical ones. It seems to be

another example amongst the innumerable forms of the family Muscide in which the

characters are transitional. |

A female specimen from the same locality (Chilpancingo) seems to belong to this

species. In its yellowish-cinereous coloration it agrees with the males, and likewise in

some particular characters, viz. the rufous tips of the front femora and the row of

marginal macrochete on the third abdominal segment. It is, however, considerably

smaller (7-5 millim.). From the females of most of the other species it differs in

having the abdomen not ovate, but of the same elliptical shape as in the male. The

front is nearly twice as broad as the eyes; the anus yellowish red.

22. Sarcophaga claripalpis, sp.n., ¢ 2.

Cinereous ; frontal band, three thoracic stripes, reflecting spots on the abdomen, and legs black; antenne

(at least the basal joints), palpi, and anal segment (also the hypopygium in 3) red; hind tibie fringed

outwardly ; wings not bristly.

Length 9°5 millim.

Head pale yellowish-grey ; front rather prominent, longer than the face, on the vertex much narrower in the.

¢ than the eyes, in the 2 as broad as the eyes; frontal band blackish ; oral margin slightly prominent ;

inferior part of the cheeks equalling one-half of the longitudinal diameter of the eyes. Antenne inserted

beneath the median line of the eyes, rufous; the third joint brownish, three times as long as the second ;

arista plumose nearly to the end. Proboscis shining black; palpi rufous, slender, gradually thicker

towards the end. Thorax and scutellum cinereous ; dorso-central bristles present ; thorax with three black

stripes; scutellum obscure on the disc. Abdomen: ( ¢ ) ovate, yellowish-cinereous, the first three segments

with a black dorsal line and two brown, broader, lateral bands, the anal segment reddish, with grey

reflections, the hypopygium red and very small; (@) broader, the first three segments cincreous, with

black reflecting spots, chiefly on the hind borders of the segments, sometimes with a black dorsal line

becoming more conspicuous, the hind border of the third segment with a rufous tinge, the anal segment

wholly of this colour; both sexes with marginal macrochete on the third and anal segments. Legs

slender, black ; tibia with some scattered bristles, the hind pair fringed on the outer side with bristly

hairs, which in the ¢ are a little longer than in the 9; foot-claws and pulvilli in both sexes short.

Tegule whitish. Wings greyish-hyaline; no bristles on the veins; small cross-vein under the middle

of the mediastinal cell and on the middle of the discal cell; curvature of the fourth vein rectangular and

with a short prolongation ; apical cross-vein very slightly concave ; posterior cross-vein straight.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith), Northern Yucatan

(Gaumer).

A male and four female specimens. This is the only Mexican species with rufous

palpi, all the others having the palpi black.

In S. rufipalpis, Macq. (Dipt. Exot. ii. 3, p. 102), from Brazil, with which I have

identified a female specimen from the island of Curacao (‘Notes from the Leyden

SARCOPHAGA. 281

Museum,’ iv. p. 88, and Tijdschr. voor Ent. xxvi. p. 36), the palpi, the basal joints

of the antenne, and the anus, also are rufous; but this must be a different species, as,

according to Macquart, it has the hind tibie clothed with long hairs (trés velues) in

the male. The specimen from Curagao is larger than the Mexican insect, and differs

from it in the shape of the interior orbits of the eyes and in having the hind tibie not

fringed with short hairs.

23. Sarcophaga sueta, sp. n., 3.

Cinereous ; head yellowish; frontal band, thoracic stripes, antenne, palpi, and legs black, the median

stripe on the thorax distinctly divided into three lines; abdomen with brown reflecting spots; hypo-

pygium red.

Length 9°5 millim.

Head yellowish, with brown reflections; front flattened, slightly prominent, on the vertex narrower than the

eyes; frontal band broader than the lateral portions; face alittle concave ; oral margin somewhat rufous ;

inferior part of the cheeks swollen, equalling more than one-third of the longitudinal diameter of the

eyes. Antenne inserted on the median line of the eyes, black, the tip of the second joint rufous; third

joint three times as long as the second; arista thickened at the base and plumose to beyond the middle.

Proboscis and palpi black. Thorax and scutellum cinereous ; thorax with five blackish stripes before the

transverse suture, the median and the two outward stripes broader and continued behind the suture ;

dorso-central bristles distinct. Abdomen conical, cinereous, with brown reflecting spots ; hind margin of

the third segment with a row of erect macrochete; hypopygium red, prominent. Legs black; hind

tibie with short hairs, and with a pair of bristles on the outer side; foot-claws and pulvilli elongate.

Tegule greyish-white. Wings greyish-hyaline; small cross-vein beyond the middle of the mediastinal

cell and on the middle of the discal cell ; curvature of the fourth vein with an acute angle; apical cross-

vein incurved ati its base ; posterior cross-vein slightly undulate.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

Three male specimens,

24. Sarcophaga tridens, sp. n., ¢ ¢.

Cinereous ; head whitish; frontal band, thoracie stripes, reflecting spots on the abdomen, antenne, palpi, and

legs black, the median stripe on the thorax divided into three narrow lines; hypopygium red, small.

‘Length 7 millim.

Front slightly prominent, flattened, in the ¢ much narrower than the eyes, that of the 2 nearly as broad as

the eyes; frontal band black, as broad as the lateral portions, which are white, with dark reflections, as

well as the face and cheeks ; lower part of the cheeks equalling one-third of the longitudinal diameter of

the eyes; on the cheeks, near the inner orbits, is a row of bristly hairs. Antenne black, inserted on

the median line of the eyes, the tip of the third joint rufous; third joint three times as long as the

second ; arista thickened and plumose on its basal half. Proboscis black, the palpi slightly enlarged and

hairy towards the apex. Thorax, scutellum, and abdomen cinereous; thorax with five black stripes

before the transverse suture, the three median stripes distinctly separated and of equal breadth, the two

lateral ones broad ; behind the suture the three median stripes are united in the usual broad median band,

which is prolonged over the scutellum ; dorso-central bristles distinct. Abdomen in both sexes ovate,

with black reflecting spots, which are more or less arranged in three rows ; the greyish ground-colour has

sometimes a bluish tinge; on the hind borders of the third and anal segments are strong and erect

macrochete ; hypopygium of the ¢ red, little prominent; anus of the 9 also red. Legs black, with

scattered bristles; hind tibie without hairs; foot-claws and pulvilli slightly elongate in the g, short in

the 9. Tegule greyish-white. Wings greyish-hyaline; third vein with some short bristles at the base

only ; small cross-vein beyond the middle of the mediastinal cell and on the middle of the discal cell ;

BIOL. CENTR.-AMER., Dipt., Vol. II., March 1896. 20

282 _ DIPTERA.

curvature of the fourth vein nearly rectangular ; apical cross-vein incurved ; posterior cross-vein some-

what undulate. .

| Hab. Mexico, Chilpancingo 4600 feet, Amula 6000 feet, Xucumanatlan 7000 feet,

all in Guerrero (H. H. Snvith). | |

Several males and one female.

25. Sarcophaga deleta, sp. n., 3.

Cinereous; frontal band, indistinct thoracic stripes, reflecting spots on the abdomen, antenne, palpi, and legs

. black ; hypopygium red, the base of the first segment black.

Length 7:5 millim.

Head whitish, with some dark reflections ; front flattened, little prominent, though angular at the insertion of

the antenne, scarcely narrower than the eyes; frontal band blackish, nearly as broad as the lateral

portions ; lower part of the cheeks equalling one-third of the longitudinal diameter of the eyes. Antenne

black, inserted on the median line of the eyes; third joint nearly three times as long as the second ;

arista plumose for two-thirds of its length. Proboscis and palpi black, the palpi cylindrical and stout.

Thorax, scutellum, and abdomen cinereous; the three thoracic bands blackish, somewhat effaced, the

median band with traces of a line on each side, and prolonged behind over the scutellum; dorso-central

bristles present. Abdomen elliptical, with black reflecting spots ; hind border of the anal segment with a

row of erect macrochete ; hypopygium prominent, red, its first segment black at the base. Legs black,

with scattered bristles. Tegule whitish. Wings greyish-hyaline, with some brownish spots at the base ;

small cross-vein under the end of the first vein and on the middle of the discal cell; curvature of the fourth

vein with an acute angle ; apical cross-vein distinctly incurved ; posterior cross-vein slightly undulate.

Hab. Mexico, Amula in Guerrero 6000 feet (Hl. H. Smith).

A single male specimen.

26. Sarcophaga tenuiventris, sp. n., ¢ ( ??).

Cinereous; frontal band, three well-defined thoracic stripes, reflecting spots on the abdomen, antenne, palpi,

and legs black; abdomen (¢ ) narrow, obconical ; hypopygium red.

Length 6 millim. .

Head yellowish ; front not at all prominent, much narrower than the eyes; frontal band black, broader than

the lateral portions ; lower part of the cheeks equalling one-fifth of the longitudinal diameter of the eyes.

Antenne black, inserted on the median line of the eyes; third joint four times as long as the second ;

arista densely plumose for two-thirds of its length. Proboscis and palpi black, the palpi slightly thickened

towards the tip. Thorax, scutellum, and abdomen cinereous ; thorax with three broad, sharply defined

black bands, the median band prolonged over the scutellum ; dorso-central bristles present. Abdomen

slender, nearly conical, narrowed posteriorly, with black reflecting spots and black hind-borders to the

segments ; anal segment with marginal macrochete ; hypopygium prominent, red, with grey reflections,

and with two black, filiform appendages at the apex. Legs black, with some scattered bristles. Tegule

whitish. Wings greyish-hyaline ; small cross-vein under the end of the first vein and on the middle of

the discal cell; curvature of the fourth vein rectangular ; apical cross-vein incurved near its base ; posterior

cross-vein slightly undulate.

Hab. Mexico, Amula in Guerrero, Teapa in Tabasco (7. H. Smith).

Two male specimens. Two females from Cuernavaca in Morelos (H. H. Smith)

probably belong to this species. They agree with the males in baving the thoracic

stripes well-defined ; the front is a little broader than the eyes, the abdomen ovate, the

anus yellowish-red.

SARCOPHAGA. 283

27. Sarcophaga oberrans, sp. n., 3 2.

Cinereous ; frontal band, three thoracic stripes, reflecting spots on the abdomen, antenne, palpi, and legs

black; abdomen ovate ; hypopygium red.

Length 7°5 millim.

Head yellowish-white, with blackish reflections ; front flattened, slightly prominent, on the vertex in the ¢

much narrower, in the 2 broader, than the eyes; frontal band blackish; inferior part of the cheeks

equalling one-fourth of the longitudinal diameter of the eyes. Antenne inserted a little above the median

line of the eyes; third joint nearly three times as long as the second; arista plumose to beyond the

middle. Proboscis and palpi black, the palpi slightly thickened towards the tip. Thorax, scutellum, and

abdomen cinereous ; thorax with three black stripes, the median stripe prolonged over the scutellum and,

before the transverse suture, with a somewhat indistinct line on each side; dorso-central bristles present.

Abdomen in both sexes ovate, with black reflecting spots, arranged in three rows; in the ¢ the hind

border of the anal segment rufous; hypopygium of the same colour and little prominent; anus of the 9

_ yellowish-red ; long erect macrochete are present on the third and anal segments. Legs black, with

scattered bristles. Tegule whitish. Wings greyish-hyaline ; small cross-vein under or a little beyond the

middle of the mediastinal cell and on the middle of the discal cell; curvature of the fourth vein with an

acute angle ; apical cross-vein distinctly incurved at the base ; posterior cross-vein nearly straight.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Sinith).

A male and two female specimens.

28. Sarcophaga triplasia, sp.n., ¢ @. (Tab. VIL. figg. 10; 10, profile.)

Cinereous ; head whitish ; frontal band, three thoracic stripes (the median with two lateral lines), reflecting

spots on the abdomen, antenne, palpi, and legs black ; no dorso-central bristles; anal segment ochraceous ;

hypopygium ( ¢) and anus (@) red; middle and hind tibie of the ¢ with long hairs.

Length 7°5-9°5 millim,

Head yellowish-white, with brown reflections ; front somewhat prominent ; vertex of the ¢ nearly as broad as

the eyes, that of the 2 broader; frontal band black; cheeks near the inner orbits with black hairs ;

inferior part of the cheeks equalling one-half of the longitudinal diameter of the eyes; under the vibrissee

are many shorter bristles ; beard yellowish; occiput grey. Antenne black, inserted on the median line

of the eyes; third joint three times as long as the second; arista plumose to beyond the middle. Pro-

boscis and palpi black. Thorax and scutellum cinereous; on the thorax three black stripes, which are

prolonged over the scutellum ; anteriorly, on both sides of the median stripe, is a dark line, which is

distinct to a little behind the transverse suture. Abdomen conical (¢) or ovate (@); the first three

segments cinereous, with black reflecting spots, the anal segment ochraceous, or at least posteriorly reddish,

with brown reflections ; hind border of the third segment with two dorsal and on each side two lateral

macrocheete, that of the anal segment with a continuous row of macrochete; hypopygium of the ¢

prominent, reddish, the second segment shining and clothed with black hairs; anus of the 2 shining red.

Legs black, the hind tibize in some specimens piceous ; middle and hind tibie of the ¢ with long black

hairs on the inner side, and with some long bristles on the outer side, in the 2 with bristles only; in the

3 the hind femora thick, the foot-claws and pulvilli elongate, and the pulvilli brown. Tegule whitish.

Wings greyish-hyaline ; some of the veins, when seen on a dark surface, appear rufous; small cross-vein

beyond the middle of the mediastinal cell and on the middle of the discal cell; curvature of the fourth

vein with an acute angle ; apical cross-vein distinctly incurved near its base ; posterior cross-vein slightly

sinuate.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

One male and three female specimens.

202

284 DIPTERA.

29. Sarcophaga tripartita, sp. n., ¢.

Cinereous ; frontal band, three thoracic stripes (the median stripe with two lateral lines), reflecting spots on

the abdomen, antenna, palpi, and legs black; no dorso-central bristles; hypopygium red; tibie not

hairy.

Length 11°5 millim. .

Head yellowish-white ; front not prominent, on the vertex a little narrower than the eyes ; frontal band black,

narrower than the lateral portions; on the cheeks, near the inner orbits, a row of minute black hairs ;

above the vibrisse a row of short bristly hairs and beneath them several bristles ; inferior part of the

cheeks equalling one-third of the longitudinal diameter of the eyes; beard whitish ; occiput dark grey.

Antenne black, inserted on the median line of the eyes; third joint three times as long as the second ;

arista plumose to beyond the middle. Proboscis and palpi black. Thorax and scutellum cinereous ;

thoracic dorsum with three black bands; on each side of the median band a distinct black stripe, reaching

posteriorly to beyond the transverse suture; external to the lateral bands is a tortuous black stripe;

dorso-central bristles absent or inconspicuous among the black pilosity of the thoracic dorsum ; scutellum

with a blackish central spot, being the continuation of the median band of the thorax. Abdomen

elliptical, tessellate with grey and blackish-brown ; seen from the side, there appear three rows of black

spots ; hind border of the anal segment with a row of macrochete ; hypopygium red, its first segment

margined with rather strong bristles, the second clothed with black hairs. Legs black; front femora on

the upper and under sides with regularly placed long hairs ; hind femora densely clothed with short hairs

beneath ; hind tibie with scattered bristles on the outer side ; foot-claws and pulvilli elongate, the pulvilli

brown. Tegule whitish. Wings greyish-hyaline; third vein with a row of minute bristles; small

cross-vein beyond the middle of the mediastinal cell and on the middle of the discal cell; curvature of

the fourth vein with an acute angle; apical cross-vein deeply incurved ; posterior cross-vein distinctly

undulate.

Hab. Mexico, Guadalajara in Jalisco (Schumann).

A single male specimen.

30. Sarcophaga pexata, sp. n., ¢ 9.

Cinereous; head ochraceous ; frontal band, three thoracic stripes, reflecting spots on the abdomen, antenne,

palpi, and legs black ; no dorso-central bristles ; in the ¢ the middle and hind tibie clothed with long

hairs, and the hypopygium red; anus of the ? ochraceous.

Length 11-12 millim.

Front not prominent; vertex of the ¢ narrower than, that of the 9 as broad as, the eyes ; frontal band black,

as broad as the lateral portions, which are ochraceous, as well as the face and cheeks; face concave, the

oral margin slightly prominent, especially in the 9; inferior part of the cheeks equalling one-third of the

longitudinal diameter of the eyes; near the inner orbits a row of minute black hairs; on the oral margin

are, in addition to the vibrissa, several other bristles; beard yellow. Antenne black, inserted on or

beneath the median line of the eyes ; third joint three to four times as long as the second ; arista thickened

at the base and plumose to beyond the middle. Proboscis and palp black; the palpi thickened and hairy

towards the tip. Thorax and scutellum cinereous ; the thorax with three black stripes, the median of

which is prolonged over the scutellum ; the thorax clothed with short hairs, but without distinct dorso-

central bristles ; at its hind border only there are some long macrocheete, as well as on the hind border

of the scutellum. Abdomen conical (3) or ovate (9), tessellate with cinereous and black, the lateral

cinereous spots more whitish ; hind border of the third segment with two dorsal and on each side two

lateral macrochete, that of the anal segment, which shows some rufous tinge, with a continuous row of

macrochete ; hypopygium of the ¢ shining red, clothed with black hairs; anus of the 9 ochraceous.

Legs black, strong ; in the ¢ the femora are hairy beneath, and the middle and hind tibie are densely

clothed with long hairs on the inner side over their whole length, and on the outer side with some long

bristles ; the hind tibie are slightly curved; in the 2 the hairs are absent; foot-claws and pulvilli

elongate in the g, the pulvilli brown. Tegule whitish. Wings greyish-hyaline; veins black; a few

SARCOPHAGA. 285

short bristles at the base of the third vein ; small cross-vein a little beyond the middle of the mediastinal

cell and exactly on the middle of the discal cell; curvature of the fourth vein with a somewhat acute

angle; apical cross-vein incurved at its base; posterior cross-vein slightly undulate.

Hab. Mexico, Chilpancingo 4600 feet and Acapulco, both in Guerrero, Atoyac in

Vera Cruz (H: H. Smith), Northern Yucatan (Gaumer).

Four males and one female.

31. Sarcophaga volucris, sp. n., ¢.

Cinereous ; head yellowish ; frontal band, three thoracic stripes, reflecting spots on the abdomen, antenna,

palpi, and legs black ; no dorso-central bristles ;-middle and hind tibie clothed with short hairs on the

inner side ; hypopygium red.

Length 9-11 millim.

Very closely allied to S. pewata, and agreeing with it in almost all characters. The head, however, is of a

paler yellow colour ; the front on the vertex is a little broader, and the legs are more slender, with their

pilosity less distinct, the hairs on the inner side of the middle and hind tibie being much shorter and

only present on the apical half.

Hab. Mexico, Amula in Guerrero, Teapa in Tabasco (H. H. Smith).

Two male specimens.

32. Sarcophaga ochripyga, sp. n., ¢ ¢.

Cinereous ; head and anal segment ochraceous; frontal band, three thoracic stripes, reflecting spots on the

abdomen, antenna, palpi, and legs black; no dorso-central bristles; legs without hairs; hypopygium

red.

Length 7°5-8°5 millim.

Front not prominent ; vertex of the ¢ less than half as broad as the eyes, that of the ? as broad as the eyes ;

frontal band black, as broad as the lateral portions, which are ochraceous, as well as the face and cheeks;

face perpendicular ; oral margin not prominent; inferior part of the cheeks equalling one-fourth (3) or

one-third (9) of the longitudinal diameter of the eyes; above the vibrisse are some shorter bristles ;

occiput dark grey. Antenne black, inserted above the median line of the eyes; third joint four times as

long as the second; arista plumose to beyond the middle. Proboscis and palpi black. Thorax and

scutellum cinereous; the thorax with three black stripes, the median stripe prolonged over the scutellum ;

dorso-central bristles are absent or totally concealed in the dense pilosity ; macrocheetze are only visible at

the sides and on the hind border ; in the 9 the lateral borders of the thorax are yellowish, the pleure

grey. Abdomen not longer than the thorax, elliptical (J) or broadly ovate (Q); the first three segments

yellowish-cinereous, with blackish reflecting spots, the anal segment ochraceous, with brown reflections ;

hind border of the third segment with two dorsal and on each side two lateral macrochete; hind border

of the anal segment with several macrochete ; hypopygium of the ¢ yellowish-red, with some black

bristles. Legs black ; tibia without hairs, with some bristles only ; foot-claws and pulvilli elongate in

the g, the pulvilli brown. Tegule yellowish-white. Wings greyish-hyaline ; small cross-vein beyond

the middle of the mediastinal and on the middle of the discal cell; curvature of the fourth vein rectan-

gular ; apical cross-vein incurved at the base; posterior cross-vein slightly undulate,

Hab. Mexico, Dos Arroyos 1000 feet, Tepetlapa 3000 feet, and Amula 6000 feet,

all in Guerrero, Frontera in Tabasco (H. H. Smith), Northern Yucatan (Gauwmer).

Two male and four female specimens.

286 DIPTERA.

33. Sarcophaga xquata, sp.n., ¢. |

Cinereous ; head ochraceous; frontal band, three thoracic stripes (as broad as the interspaces), reflecting spots

on the abdomen, antenna, palpi, and legs black; no dorso-central bristles ; legs without hairs; hypo-

pygium red.

Length 8°5 millim. :

Head ochraceous, with brown reflections ; front a little prominent, on the vertex half as broad as the eyes;

frontal band black, as broad as the lateral portions; face perpendicular ; some minute hairs near the

inner orbits; above the vibrisse are some short and beneath them several long bristles; inferior part of

the cheeks equalling one-third of the longitudinal diameter of the eyes; occiput grey. Antenne black,

inserted on or a little above the median line of the eyes; third joint three times as long as the second ;

arista plumose for three-fourths of its length. Proboscis and palpi black. Thorax, scutellum, and

abdomen yellowish-cinereous ; thorax with three distinct black stripes, which are as broad as the inter-

spaces, the median stripe prolonged over the scutellum; thoracic dorsum with black hairs, without

dorso-central bristles, except near the hind border. Abdomen elliptical, with blackish reflecting spots,

arranged more or less in three rows ; hind border of the third segment with two dorsal and on each side

two lateral macrochete, that of the anal segment with a complete row of strong macrochete ; hypopygium

red, shining, densely clothed with black hairs, its first segment partly ochraceous. Legs black; tibie

without hairs, but with several bristles ; foot-claws and pulvilli elongate, the pulvilli blackish. Tegule

whitish. Wings greyish-hyaline ; small cross-vein beyond the middle of the mediastinal cell and on the

middle of the discal cell; curvature of the fourth vein rectangular ; apical cross-vein concave at its base ;

posterior cross-vein very slightly undulate.

Hab. Mexico, Amula in Guerrero 6000 feet, ‘Teapa in ‘Tabasco (H. H. Smith).

Two male specimens.

34. Sarcophaga afficta, sp.n., ¢ 9.

Cinereous; head ochraceous; frontal band, three thoracic stripes (narrower than the interspaces), reflecting

spots on the abdomen, antennz, palpi, and legs black; no dorso-central bristles ; legs without hairs ;

hypopygium of the ¢ red. |

Length 8 millim.

Head ochraceous ; front not prominent, on the vertex a little narrower than the eyes (¢), or as broad as the

eyes (2); frontal band black, nearly as broad as the lateral portions; inferior part of the cheeks scarcely

equalling one-third of the longitudinal diameter of the eyes; beard black, with some yellow hairs intermixed.

Antenne black, inserted on or a little above the median line of the eyes; third joint three times as long

as the second ; arista plumose to beyond the middle. Proboscis and palpi black. Thorax and scutellum

cinereous, the thorax laterally yellowish, the pleure grey; thoracic dorsum with three black stripes,

which are narrower than the interspaces ; thorax without dorso-central bristles, only laterally and near

the hind border with macrochete. Abdomen conical (3) or ovate (2), yellowish-cinereous, towards the

apex with an ochraceous tinge; the blackish reflecting spots not much extended, and somewhat in the

form of three longitudinal stripes ; hypopygium of the $ yellowish-red. Legs black ; hind tibize without

hairs, with bristles only ; foot-claws and pulvilli elongate in the ¢, the pulvilli yellowish-brown, Tegule

whitish. Wings greyish-hyaline ; small cross-vein beyond the middle of the mediastinal and on the

middle of the discal cell; curvature of the fourth vein rectangular, with a distinct appendage ; apical

cross-vein incurved at its base; posterior cross-vein nearly straight.

Hab. Mexico, Cuernavaca in Morelos, Atoyac in Vera Cruz (H. H. Smith), Northern

Yucatan (Gaumer).

Several males and one female.

SARCOPHAGA.—PHRISSOPODA. 287

_ The following species of Sarcophaga have been described from Mexico :—

Sarcophaga plinthopyga, Wiedem. Aussereur. Zweifl. Ins. ii. p. 360. no. 10; Giglio-

Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xliv. p. 69.

trivittata, Macq. Dipt. Exot. ii. 3, p. 105, t. 12. fig. 3.

— trigonomaculata, Macq. 1. c. p. 106, t. 13. fig. 2.

perneta, Walk. Trans. Ent. Soc. Lond. new ser. v. p. 308.

innota, Walk. 1. c. p. 308.

conclausa, Walk. |. c. p. 309.

despensa, Walk. |. c. p. 309.

effrenata, Walk. 1. c. p. 309.

spinigena, Rond. Arch. per la Zool. iii. p. 26 (Modena, 1863); Giglio-Tos,

Mem. R. Accad. Scienze di Torino, ser. 2, xliv. p. 68.

Both sexes are described of S. plinthopyga, Wiedem., and S. spinigena, Rond.; the

males .only of S. perneta and S. effrenata, Walk.; and females only of the others.

‘The descriptions, however, are in most cases quite superficial and apply equally well to

several different species. The above-described S. trivialis (no. 16) may prove to be not

different from S. plinthopyga, Wiedem.; but, as in the description of the latter nothing

is said with respect to the presence or absence of dorso-central bristles, the bristles on

the veins, &c., S. prevolans (no. 13) or S. ochripyga (no. 32) might equally well be

referable to the true S. plinthopyga, Wiedem.

_ &. spinigena, Rond., has the arista not plumose, but only pubescent in the ¢, bare

in the ?, and the cheeks armed with strong bristles; it should perhaps be separated

“generically from the true Sarcophage.

PHRISSOPODA.

-Peckia, Robineau-Desvoidy, Essai sur les Myodaires, p. 335 (1830).

_Phrissopoda, Macquart, Suites & Buffon, 11. p. 222 (1835).

This genus includes some large species with the abdomen of a uniform black or

metallic colour. The veins are curved as in the true Sarcophage. In the males the

legs are densely hairy and the hypopygium is very prominent.

In the Central-American collections before me the genus Phrissopoda is not repre-

‘sented, but the following species from Mexico are enumerated by Dr. E. Giglio-Tos

[Memorie della R. Accademia delle Scienze di Torino, ser. 2, xliv. pp. 67, 68 (1893) ]:—

_ Phrissopoda preceps, Wiedem. Aussereur. Zweifl. Ins. ii. p. 355. no. 1 (Sarcophaga);

Brauer & von Bergenst. Denkschr. der k. Akad. Wissensch. Wien, lvi.

p. 124, and lx. p. 162; Giglio-Tos, l. c. p. 67.—Peckia imperialis, Rob.-

Desv. Essai sur les Myodaires, p. 335; Phrissopoda imperialis, Macq.

Suites 4 Buffon, ii. p. 223. no. 1; Phrissopoda imperialis, Macq. Dipt.

288 DIPTERA.

Exot. ii. 3, p. 96; Sarcophaga fortipes, Walk. ‘Trans. Ent. Soc. Lond.

new ser. v. p. 310.

Phrissopoda lamanensis, Rob.-Desv. Essai sur les Myodaires, p. 335 (Peckia) ;

Giglio-Tos, 1. c. p. 68.

plumipes, Rob.-Desv. Essai sur les Myodaires, p. 336 (Peckia); Giglio-Tos,

l. c. p. 68.—Sarcophaga intermutans, Walk. Trans. Ent. Soc. Lond. new

ser. v. p. 308.

immanis, Walk. List of Dipt. Ins. iv. p. 815 (Sarcophaga) ; Giglio-Tos, 1. ¢.

p. 67.

ONESIA.

Onesia, Robineau-Desvoidy, Essai sur les Myodaires, p. 365 (1830).

In the species of this genus the abdomen is metallic blue or green. From Phrisso-

poda, of which some species also have a more or less metallic abdomen, and from

Cynomyia, in which this character is common to all the species, Onesia differs in

having the curvature of the fourth vein with an obtuse angle and the apical cross-vein

straight or nearly so.

One species of Onesia is represented in the Mexican collections before me.

1. Onesia lucilioides, sp.n., ¢. (Tab. VII. fig. 11, ¢.) |

Metallic-blue, the thorax with purple, the abdomen with green reflections; head white; antenne, palpi, and

legs black.

Length 6 millim.

In the broad form and the splendid metallic coloration this species, at first sight, resembles a Lucilia; but the

presence of the macrochete on the abdominal segments shows that it evidently belongs to the genus

Onesia. The front is black and very narrow (equalling about one-fourth of the transverse diameter of

the eyes), with nearly parallel sides. Face and cheeks white, with brown reflections; inferior part of

the cheeks equalling one-third of the longitudinal diameter of the eyes. Antenne black, inserted on the

median line of the eyes ; third joint three times as long as the second; arista thickened in its basal third

and plumose to beyond the middle. Proboscis and palpi black. Thorax quadrate, steel-blue, without

any whitish tomentum or stripes; the hind angles purple; dorso-central bristles distinct. Scutellum

violet. Abdomen ovate, as long and broad as the thorax, metallic blue, with green reflections, clothed

with black hair; second segment with lateral macrochete only; a row of macrochete at the hind

border of the third segment; anal segment with macrochete on the whole surface; hypopygium con-

cealed. Legs black ; anterior cox with grey tomentum ; femora and tibie with scattered bristles; hind

tibie slightly curved ; tarsi slender, as long as the tibie ; foot-claws somewhat elongate ; pulvilli yellow.

Tegule yellowish-grey. Wings hyaline, with a slight greyish tinge; small cross-vein a little before the

end of the first vein and on the middle of the discal cell; curvature of the fourth vein with an obtuse

angle; apical cross-vein nearly straight ; posterior cross-vein very slightly undulate.

Hab. Mexico, Mexico city (H. H. Smith).

A single male specimen.

SARCOPHAGULA. 289

SARCOPHAGULA.

Sarcophagula, v. d. Wulp, Tijdschr. voor Ent. xxx. p. 173 (1887).

This genus has the general habitus of Sarcophaga, but differs in the neuration of the

wings, the second and third veins being straight, as well as the posterior cross-vein ;

the latter is in the middle, or nearly in the middle, between the small cross-vein and

the curvature of the fourth vein; the apical cross-vein is scarcely curved; the medi-

astinal cell is very small. The antenne are inserted above the median line of the eyes.

The inferior portion of the cheeks is very narrow. In both sexes there are two orbital

bristles on each side of the front. The black stripes on the thorax and the black

pattern on the abdomen are usually less distinct, and the hypopygium of the male less

developed, than in Sarcophaga. ‘The dorso-central bristles on the thorax are con-

spicuous. The foot-claws and pulvilli are short in both sexes. The species are all of

small size.

In the Mexican collections before me three species are represented :—

1, Third vein with a row of bristles . . 0. 0.0. ee ee eee ee tmbecilla, 3, Some

Third vein bare... ee eee

2. Frontal band black . . 2... ee ee ee ee ee CaNUEA, 1 Be ae

Frontal band reddish. 2. 1 ee ee ee ee ee ww LENMISL 1 - AS rv

1. Sarcophagula imbecilla, sp.n., 2.

Greyish-cinereous ; frontal band, thoracic stripes, reflecting spots on the abdomen, antenne, palpi, and legs

black; third and anal segments with macrochete; antenne elongate in the ¢; third vein bristly.

Length 3°5 millim.

Head whitish-grey, with a yellow tinge; front of the ¢ as broad as the eyes, that of the 2 broader ; frontal

band black, narrow. Antenne black; second joint prominent; third joint slender and elongate in the 2,

more than twice as long as the second; arista thickened at the base, plumose to beyond the middle.

Thorax and scutellum cinereous; thoracic dorsum with three blackish stripes. Abdomen elliptical (3)

or ovate (Q ), greyish-cinereous, with black reflections, sometimes forming three longitudinal stripes and

hind borders to the segments (in the @ the markings of the thorax and abdomen are browner and less

striking); a pair of marginal macrocheete on the third segment, and a row of macrochetee on the anal

segment; hypopygium of the g greyish. Legs black, with scattered bristles. Tegule whitish. Wings

greyish-hyaline ; third vein with a row of short bristles; small cross-vein under the end of the first vein

and on the middle of the discal cell.

Hab. Mexico, Orizaba(H. H. Smith and F. D. Godman), Amula and Chilpancingo in

Guerrero, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith).

Several specimens of both sexes.

9. Sarcophagula canuta, sp.n. ¢ 2. (Tab. VII. figg. 12; 12a, abdomen in

profile.)

Greyish-cinereous ; frontal stripe, antenne, palpi, and legs black; thoracic stripes and reflections on the

abdomen brown; second abdominal segment with two marginal macrochet.

Length 2°5-3°5 millim.

BIOL. CENTR.-AMER., Dipt., Vol. 1I., May 1896. 2p

290 DIPTERA.

Head whitish-grey ; front of the ¢ a little, that of the 9 much, broader than the eyes, with parallel sides ;

frontal band black, as broad as the lateral portions. Antenne black; third joint nearly double as long

as the second; arista thickened and plumose in its basal half. Proboscis and palpi black. Thorax,

scutellum, and abdomen greyish-cinereous ; thoracic dorsum with three indistinct brown stripes; scutellum

with a large, blackish, discal spot. Abdomen elliptical (¢) or ovate (2); the hind borders of the

segments brown ; second and third segments with a pair of marginal macrochete ; anal segment with a

full row of macrochete; hypopygium of the ¢ small, blackish-brown, shining. Legs black, with scattered

bristles. Tegule whitish. Wings brownish-hyaline; mediastinal cell very small; small cross-vein

under the end of the first vein and on the middle of the discal cell; posterior cross-vein nearly in the

middle between the small cross-vein and the curvature of the fourth vein; the third vein apparently

without bristles.

Hab. Mexico, Orizaba (H. H. Smith and F. D. Godman), Cuernavaca in Morelos,

Tepetlapa 3000 feet, Chilpancingo 4600 feet, and Amula 6000 feet, all in Guerrero,

Atoyac and Medellin in Vera Cruz, Teapa in Tabasco, Mexico city (#. H. Smith).

A considerable series of specimens of both sexes.

3. Sarcophagula tenuis, sp.n., ¢ @.

Cincreous ; thoracic stripes and reflections on the abdomen brownish ; frontal band reddish; antenne, palpi,

and legs black.

Length 2-2°5 millim.

Head greyish-white; front in both sexes broader than the eyes; frontal band rufous, narrower than the

lateral portions. Antenne black, rather short; third joint scarcely longer than the second. Proboscis

and palpi black. Thorax, scutellum, and abdomen cinereous; on the thorax three brown stripes,

which sometimes are indistinct. Abdomen ovate, in the g as broad as the thorax, in the 9 broader ;

brown reflecting spots are more or less conspicuous on it; second segment with a pair of marginal

macrochete, which, however, are absent in the 9; third and anal segment with several macrochete.

Legs black, with some scattered bristles. Tegule whitish. Wings greyish-hyaline; neuration as in

S. canuta,

Hab. Mzxico, Chilpancingo in Guerrero, Cuernavaca in Morelos, Atoyac in Vera

Cruz, Teapa in Tabasco (H. H. Smith).

Two male and two female specimens.

Two females, also with a fulvous frontal band, one from Atoyac (H. H. Smith), the

other from Santiago Iscuintla (Schumann), are of a much larger size (4 millim.). I

cannot, however, find any essential difference between them and the others. They may

belong to Sarcophaga obsoleta, Wiedem. (Aussereur. Zweifl. Ins. ii. p. 367. no. 29),

which, according to Giglio-Tos (Mem. R. Accad. Scienze Torino, ser. 2, xliv. p. 68),

occurs also in Mexico.

MUSCIN 2.

Group MUSCINZ.

In the Muscine, as in the preceding groups, the tegule are large and well developed,

and the terminal portion of the fourth vein is curved upwards, thus forming an apical

cross-vein.

This last-mentioned character, however, becomes less conspicuous in certain

genera, and these form a transition to the following group (Anthomyine), in which the

fourth vein runs in a straight line to the tip of the wing.

For the rest, the Muscine

usually have the arista plumose over its whole length, and the abdomen short ovate

and without macrocheetee, or if these are present they are feebly developed.

Some of the commoner species of this group are cosmopolitan.

In the Central-American collections which I have examined the following genera of

Muscine are represented :—

Proboscis long, porrect, pointed towards the tip; arista plumose

on the upperside only . . .

Proboscis short, with well- developed terminal lips ;

usually plumose on the upper and under sides *

arista

. Curvature of the fourth vein angular .

Curvature of the fourth vein rounded or arcuate .

Eyes plumose oe

Eyes bare. . . . - « . Lee ee

. Middle tibie without bristles on the i inner side (blackish species,

with the abdomen sometimes more or less yellow, but always

with a total absence of metallic coloration) .

Middle tibize with one or more bristles on the inner side (species

often with a metallic coloration on the abdomen or other

parts on the body)

Thoracic dorsum usually blackish . . . . oe ee

Thorax, scutellum, and abdomen brightly metallic .

Dorso-central bristles distinct; usually some shorter bristles

above the vibrissz . oe . 8 oo

Dorso-central bristles absent ; no bristles above the vibrisse .

. Thoracic dorsum with rather distinct black and whitish longi-

tudinal stripes . we ees . oe

Thorax unicolorous, metallic, at most with some whitish

tomentum on the anterior portion

. Wholly metallic species . . . . . :

Black, grey, or rufous species, sometimes with the abdomen,

except at the base, metallic

. Apical cross-vein distinct, longer than the terminal portion of

the fourth vein before its curvature; apical cell opened a

little before the tip of the wing .

Stomoxys, Geoftir.

mw n

Tyreomma, v. d. Wulp.

Musca, Li.

Calliphora, Rob.-Desv.

Chloroprocta, v. d. Wulp.

Compsomyia, Rond. *) ©

Lucilia, Rob.-Desv. —

Pyrellia, Rob.-Desv.

10.

* Except in Hemichlora vittigera, Big.,

in which the arista is plumose on the upperside only,

2p 2

292 DIPTERA.

Apical cross-vein less conspicuous ; fourth vein curved upwards

at its extremity only; apical cell widely openel at the tip of

the wing. .- » - 12,

10. Antenne at their base slightly separated by. a carina "(body

grey, or partly rufous, with a well-defined black pattern). . Graphomyia, Rob.-Desv. Doo

_—

Antenne not separated by a carina . . ll.

1l. Middle tibize with a bristle on the inner side apical cell widely

opened ; mediastinal cell sometimes very elongate . . . Mesembrinella, Gigl.-Tos.”, . .,

Middle tibie without bristles on the inner side; apical cell

somewhat narrowly opened . . . «ee + + + + Morelia, Rob.-Desv.

12. Eyes pilose 2... 6 ew ee ee eee es Myiospila, Rond.

Eyes bare. . . . s - - woe ew ew ew ew ew 1,

13. Arista short-plumose on the upper side only ;_ coloration

testaceous, the abdomen partly metallic . . . . . ~. « Hemichlora, v. d. Wulp. 3°

Arista plumose on the upper and under sides; no metallic

coloration . . . « -» ° . . . 14.

14. First vein terminating at the middle of the costa ; fourth ¥ vein

with a distinct curvature near the tip of the wing . . . . Muscina, Rob.-Desv.

First vein terminating before the middle of the costa (medi-

astinal cell very small) ; fourth vein scarcely curved upwards

atitsdistalend . . . ee ee eee we ee Clinopera, v.d. Wulp.? 6

STOMOXYS.

Stomoxys, Geoffroy, Hist. abr. des Ins. ii. p. 588 (1764).

1. Stomoxys calcitrans.

Conops calcitrans, Linn. Faun. Svec. p. 467 ',

Stomoxys calcitrans, Fabr. Syst. Antl. p. 280°; Meigen, Syst. Beschr. iv. p. 160 >; Macq. Dipt.

Exot. ii. 8, p. 114*; Schiner, Faun. Austr. i. p. 578°; id. Reise der Novara, Dipt. p. 311°

van der Wulp, Dipt. Sumatra-Exped. p. 43°; Rond. Arch. per la Zool. ul. p. 32°; v. Rider,

Stett. ent. Zeit. 1886, p. 347°.

Stomozys tessellata, Fabr. Syst. Antl. p. 281”.

Stomoxys sugillatriz, Rob.-Desy. Essai sur les Myodaires, p. 386".

Stomoxys aculeata, Rob.-Desv. loc. cit. p. 386".

Stomoxys pungens, Rob.-Desv. loc. cit. p. 386.

Hab. Mexico, Orizaba (H. H. Smith and F. D. Godman), Mexico city, Teapa and

Frontera in Tabasco (H. H. Smith); Costa Rica, Caché and Rio Sucio (Hogers).—Soutu

America, Brazil!!; Anrittes, Porto Rico 9—-Evuropr1~*; Cuina®; Cryton®; Java ®;

Sumatra? ; Canary Is.4; S. Arrica’; AUvsTRALia, Sydney ®. 5

Several specimens of both sexes of this species have been received from Mexico and

Costa Rica.

eh)

TYREOMMA.—MUSCA. 29

TYREOMMA, gen. nov.*

Eyes distinctly pilose. Head as broad as the thorax; front and cheeks broad, the inferior portion of the

latter equalling more than half the longitudinal diameter of the eyes; face slightly concave, not carinated

in the middle ; frontal bristles descending to the root of the antennex ; three orbital bristles ( 2 ); vibrissz

inserted close to the oral margin ; some short bristles above and several others behind them. Antenne

inserted beneath the median line of the eyes; third joint two or three times as long as the second ; arista

moderately plumose, but not quite to the tip. Proboscis short, with distinct terminal lips ; palpi slightly

thicker towards the tip. Thorax with distinct dorso-central bristles. Abdomen broadly ovate, as long

as the thorax; the third and anal segments with marginal macrochete only, the second segment with

lateral macrochete also. Legs proportionately short; hind tibie fringed outwardly. Tegule large.

Wings longer than the abdomen; apical cell opened a little before the tip of the wing; curvature of the

fourth vein rectangular, but without appendage; posterior cross-vein beyond the middle between ihe

small cross-vein and the curvature of the fourth vein.

In its general habitus (the broad form and short legs) this genus agrees with the

group Muscine; the somewhat developed macrochete on the abdomen, and the

plumosity of the arista, which does not reach quite to the tip, indicate, however, some

relation with the Sarcophagine.

1. Tyreomma muscinum, sp.n.,9. (Tab. VIL. figg. 13, 2 ; 13a, head in profile.)

Grey; thoracic stripes, hind borders of the abdominal segments, third antennal joint, and legs black; palpi

and basal joints of the antenne rufous.

Length 9 millim.

Head whitish-grey ; cheeks and oral margin with rufous-brown reflections; front (9 ) broader than the eyes ;

frontal band blackish ; frontal bristles short, but numerous. Eyes densely beset with a yellowish pile.

Antenne shorter than the face; the two basal joints and the base of the third rufous. Palpi rufous.

Thorax grey, with a median and two lateral stripes black; the median stripe extends over the whole

length of the thorax, and is anteriorly flanked by two black lines, which are convergent in front;

the lateral stripes are interrupted at the transverse suture, the anterior portion being small and of elon-

gate-trigonal shape. Scutellum grey. Abdomen convex, broader than the thorax ; first segment entirely

black ; the second segment black, with a grey front-border, which in the middle is enlarged and shows a

black dorsal line; third segment with a whitish-grey front-border; anal segment grey, with blackish

reflections; third segment with two marginal macrochete; anal segment with several macrochete.

Legs black; front femora with a row of bristles on the upper and under sides; middle tibie with two

bristles on the outer side; hind tibis fringed on the outer side with bristly hairs, and also with two

longer bristles ; foot-claws and pulvilli very short. Tegul yellowish-grey. Wings greyish; small cross-

vein on the middle of the discal cell ; apical cross-vein concave ; posterior cross-vein distinctly curved.

Hab. Mexico, Omilteme in Guerrero 8000 feet (HZ. H. Smith).

A single female specimen.

MUSCA.

Musca, Linneus, Faun. Suec. p. 439 (1763).

1. Musca domestica.

Musca domestica, Linn. Faun. Suec. p. 453’; Fabr. Syst. Antl. p. 287°; Meig. Syst. Beschr. v.

p. 67. 31°; Schiner, Faun. Austr., Dipt. i. p. 594°; id. Reise der Novara, Dipt. p. 806°;

van der Wulp, Dipt. Sumatra-Exped. p. 43°; id. Tijdschr. voor Ent. xxvi. p. 38"; v. Réder,

* znpéw (to protect) ; dupa (eye).

294 DIPTERA.

Stett. ent. Zeit. 1885, p. 347°; Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.)

p. 7°. .

Musca analis, Macq. Dipt. Exot. ii. 3, p. 154”.

Musca vicina, Macq. Dipt. Exot., Suppl. 4, p. 253”.

Musca consanguinea, Rond. Esame di varie specie de insetti ditteri brasiliani (Torino, 1848), pp. 18,

29”,

Hab. Mextco®, San Blas in Jalisco (Schumann), Patzcuaro (F. D. Godman), Orizaba

(1. H. Smith and F. D. Godman), Fortin in Vera Cruz, Chilpancingo 4600 feet and

Amula 6000 feet, both in Guerrero (H. H. Smith); Northern Yucatan (Gaumer) ;

Costa Rica, Volean de Irazu (Rogers).—SoutH AMERICA, Brazil, Chili!®, Argentina’;

ANTILLES, Porto Rico’, Guadeloupe 7.—Evurore!4; MADEIRA ; SINGAPORE®; CHINA®;

Sumatra ®; S. Arrica®; AuSTRALIA, Sydney °.

CALLIPHORA.

Calliphora, Robineau-Desvoidy, Essai sur les Myodaires, p. 483 (1830).

In the Central-American collections which I have examined, four species of this

genus are represented :—

1. Wings not darker at the base than on the other parts of the surface. erythrocephala, Meig.

Wings blackish-brown at the base . . . . we ee

2. Thorax partly and the scutellum, as well as the abdomen, metallic. prescia, Gigl.-Tos.

Thorax and scutellum black . . . . . ee ee we we ee Be

3. Abdomen metallic-blue . . . 2... 1. + ee ee ee) 68emiatra, Schin.

Abdomen black . . 2. 1 1. ee ee ee ee ee melanaria, v. d. Wulp.

1. Calliphora erythrocephala,

Musca erythrocephala, Meig. Syst. Beschr. v. p. 62+; Wiedem. Aussereur. Zweifl. Ins. ii. p. 395°.

Calliphora erythrocephala, Schin. Faun. Austr., Dipt. i. p. 584°.

Calliphora vomitoria, Macq. Suites & Buffon, ii. p. 262°.

Hab. Mexico, Ciudad in Durango and Ventanas (forrer).—Europe1?4; §, AFRICA ;

Eeyer ?.

Five females from North-west Mexico, fully agreeing with European specimens; they

vary from 6-11 millim. in length.

2. Calliphora preescia.

Lucilia prescia, Gigl-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 3°.

Hab. Mexico}, Orizaba (H. H. Smith and F. D. Godman), Xucumanatlan 7000 feet

and Omilteme 8000 feet, both in Guerrero (H. H. Smith); Costa Rica, Volcan de

Trazu 6000 to 7000 feet (Rogers).

Several specimens of both sexes. The colour of this insect is metallic-blue with

purple reflections, more obscure than that of the species of Lucila, and, with the

exception of the lateral portions and the hind border, the thoracic dorsum is black,

with some grey tomentum, especially on the front part. The insect, therefore, is

CALLIPHORA. 295

perhaps best placed in the genus Calliphora, more especially as it seems to be allied to

C. semiatra, Schiner, and C. prepes, Gigl.-Tos.

Giglio-Tos has described it in a very recognizable manner, but the male sex only was

known to him. In the female the front is as broad as the eyes; the frontal band is broad

and blackish ; and the facets of the eyes are allof minute size. In both sexes the hind

tibie are slightly carinated on their outer side, and fringed with short bristly hairs.

C. prescia closely resembles Onesia lucilioides (see p. 288), but the colour is less bright

metallic, the antenne are longer, the arista is plumose to the tip, and the abdomen is

without macrochete.

3. Calliphora semiatra. (Tab. VII. fig. 14, head in profile.)

Calliphora semiatra, Schiner, Reise der Novara, Dipt. p. 308. 47+; v. Roder, Stett. ent. Zeit. 1886,

p- 269°; Giglio-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 1°.

Hab. Mexico ?, Ciudad in Durango (Forrer), Omilteme 8000 feet and Sierra de las

Aguas Escondidas 9500 feet, both in Guerrero (H. H. Smith); Costa Rica, Volcan de

Irazu 6000 to 8000 feet (Aogers).—Co tomBia }.

Three male and eight female specimens, varying from 8-11 millim. in length. The

front is not at all prominent: in the female as broad as the eyes, with parallel lateral

borders; in the male in the form of a small triangle, drawn out upwards in a linear

. prolongation between the eyes. On the facial ridges there is a row of short bristly

hairs. The small cross-vein is very oblique, under the middle of the mediastinal cell

and on the middle of the discal cell; the curvature of the fourth vein forms a rather

acute angle ; the apical cross-vein is incurved at its base, and for the rest straight, the

posterior cross-vein undulate.

4, Calliphora melanaria, sp.n.¢. (Lab.VII. figg. 15, g ; 154, head in profile.)

Deep black, the abdomen bluish-black; thorax anteriorly with some grey tomentum; head yellowish;

antenne and palpi rufous; base of the wings blackish-brown.

Length 10°5-12°5 millim.

Front slightly prominent, trigonal, the eyes scarcely separated on the vertex ; frontal band black, with grey

reflections; face and cheeks pale yellowish-grey; lower part of the cheeks equalling one-third of the

longitudinal diameter of the eyes; vibrissew inserted a little above the oral margin, which is somewhat

prominent ; facial ridges bare. Antenne rufous, inserted beneath the median line of the eyes; second

joint with a rather long bristle ; third joint three times as long as the second ; arista black, thickened at

the base, sparsely plumose, but not to the tip. Proboscis shining black; palpi rufous, slender, slightly

thicker towards the tip. Thorax black, anteriorly with some cinereous tomentum and indistinct black

lines. Scutellum black. Abdomen unicolorous, shining black ; third and anal segments thickly clothed

with black hairs. Legs black; hind tibiz fringed outwardly with bristly hairs of unequal length; foot-

claws and pulvilli elongate (3). Tegule dark brown. Wings brownish-hyaline, blackish-brown at the

base, this dark coloration reaching to beyond the humeral cross-vein and covering the inferior basal cells ;

the veins, when seen upon a dark surface, appear rufous-brown; small cross-vein a little beyond the

auxiliary vein and on the middle of the discal cell; curvature of the fourth vein rectangular; apical

cross-vein slightly concave ; posterior cross-vein undulate.

_ Hab. Mexico, Amula in Guerrero 6000 feet (£7. A. Simith).

Three male spec’mens. ‘This species is allied to C. semiatra, Schin.; but differs

296 DIPTERA.

from it in the pale coloration of the face and cheeks, the more prominent front, the

less approximate eyes (¢), the rufous antenne, the almost total absence of metallic

gloss on the abdomen, and the absence of bristles on the facial ridges. This last-

mentioned negative character is exceptional even in the genus Caldiphora, all the species

of which, so far as I know, have the facial ridges more or less beset with bristles above

the vibrisse. For the rest, the species is evidently congeneric with C. semiatra.

CHLOROPROCTA, gen. nov.*

Eyes bare. Front of the ¢ small, triangular (the eyes being quite coalescent), that of the 2 as broad as the

eyes, somewhat narrower towards the root of the antenne ; frontal bristles weak ; orbital bristles absent

in both sexes. Face perpendicular, the facial ridges convergent below ; vibrisse inserted a little above

the oral margin; no bristles above them; cheeks with insignificant pilosity, their inferior portion equalling

one-fourth of the longitudinal diameter of the eyes. Antenne inserted on the median line of the eyes ;

basal joints short; third joint four times as long as the second and reaching the vibrisse ; arista plumose

in its entire length, more densely on the upperside. Proboscis with well-developed terminal lips; palpi

cylindrical, Thorax quadrate; dorso-central bristles inconspicuous, some posterior ones excepted ;

scutellum semicircular, with marginal macrochete. Abdomen short-ovate, broader than the thorax,

without macrochete, but with the last segments somewhat hairy. Legs slender, with weak bristles ;

middle tibiz with a bristle on the inner side ; foot-claws and pulvilli short in both sexes. Tegule rather

large. Wings longer than the abdomen; small cross-vein under the end of the first vein and on the

middle of the discal cell; curvature of the fourth vein rectangular; apical cross-vein slightly concave ;

apical cell opened nearly at the tip of the wing ; posterior cross-vein oblique and undulate, nearer to the

curvature of the fourth vein than to the small cross-vein.

The species for which this new genus is proposed are of about the size of our

common house-fly, but they are broader and of a testaceous colour, with the last abdo-

minal segments metallic-green. From Ochromyia, Macq., and Bengalia, Rob.-Desv.,

both including yellowish or rufous species, they differ in having the orbital bristles

absent on the front in both sexes, and in the non-setulose third vein of the wings.

1. Chloroprocta semiviridis, sp.n., ¢ @. (Tab. VII. fig. 16, 3.)

Testaceous; thoracic dorsum blackish ; abdomen posteriorly metallic green ; antenne, palpi, and legs rufous ;

wings brownish.

Length 6 millim.

Head yellowish-rufous; eyes of the g with large facets in the middle; beard yellow. Thoracic dorsum

blackish-brown, with grey tomentum, which is most conspicuous on the front portion; pleure testaceous.

Scutellum brown, slightly shining. First abdominal segment and the front margin of the second testa-

ceous; the rest of the abdomen metallic bluish-green in the g, blacker and less metallic, save on the

anal segment, in the 9. Legs rufous, the tarsi blackish towards the tip. Tegule yellow. Wings

brownish, the colour more intense along the costa.

Hab. Mexico, Northern Yucatan (Gaumer).

Two specimens, one of each sex.

2. Chloroprocta —— ?

Hab. Mexico, Northern Yucatan (Gaumer).

Two males and one female, all in a bad state of preservation. ‘They are undoubtedly

* y\wpds (green) ; mpwkrds (rump).

CHLOROPROCTA.—LUCILIA. 297

congeneric with C. semiviridis, but their coloration is more obscure; the scutellum and

nearly the whole of the abdomen are shining black, the first segment only of the latter

being partly testaceous.

COMPSOMYIA.

Compsomyia, Rondani, Ann. Mus. Genova, vil. p. 425 (1875).

1. Compsomyia macellaria.

Musca macellaria, Fabr. Syst. Ent. p. 776*; Syst. Antl. p. 292°; Wiedem. Aussereur. Zweifl.

Ins. ii. p. 405°.

Lucilia macellaria, Macq. Dipt. Exot. ii. 3, p. 147, t. 17. fig. 9°.

Compsomyia macellaria, Lynch Arrib. An. Soc. Cient. Argent. x. pp. 71, 240°; van der Wulp,

Tijdschr. voor Ent. xxvi. p. 38°.

Chrysomyia macellaria, Gig|.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 5”.

Calliphora fulvipes, Macq. Dipt. Exot. ii. 3, p. 182°.

Chrysomyia fulvipes, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 6°.

Somomyia aztequina, Bigot, Ann. Soc. Ent. Fr. 1877, p. 252”.

Calliphora tristriata, Verhuell, Tijdschr. voor de Wis- en Natuurk. Wetensch. iii. p. 273, t. 3"*.

Hab. Mexico, Ciudad in Durango, Mazatlan, and Presidio (forrer), Orizaba

(H. H. Smith and F. D. Godman), Jalisco, Atoyac in Vera Cruz (Schumann), Cuerna-

vaca in Morelos, Tepetlapa, Xucumanatlan, Omilteme, and Sierra de las Aguas

Escondidas in Guerrero (H. H. Smith); Costa Rica, Volcan de Irazu (Rogers).—

Sovran America, Surinam !!, Brazil °, Chili §, Argentina®; ANTILLES, Cuba 4.

Several specimens of both sexes, varying from 5:5-10 millim. in length; some have

the legs black, and others have the femora and tibie more or less rufous (fulvipes,

Macq.), but there are many transitions in this respect. The thoracic dorsum is densely

clothed with black hairs, but dorso-central bristles are not visible.

LUCILIA.

Lucilia, Robineau-Desvoidy, Essai sur les Myodaires, p. 452 (1830).

1. Lucilia cesar.

Musca cesar, Linn. Faun. Suec. p. 451°; Fabr. Syst. Antl. p. 289°; Meig. Syst. Beschr. v.

p- 51°.

Lucilia cesar, Schin. Faun. Austr., Dipt. i. p. 589*; van der Wulp, Tijdschr. voor Ent. xxvi.

p. 38°.

Lucilia lepida, Rob.-Desv. Essai sur les Myod. p. 453°.

Lucilia fraterna, Macq. Dipt. Exot., Suppl. 3, p. 577.

Lucilia consobrina, Macq. I. c.°

Hab. Norta AmeERicA, Quebec’, Philadelphia °—Mexico, Ciudad in Durango and

* For the rest of the synonymy, see Lynch Arribalzaga, 1. ¢., and Giglio-Tos, J. ¢.

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1896. 29

298 DIPTERA.

Presidio (Forrer), Jalisco, Atoyac in Vera Cruz (Schumann), Cuernavaca in Morelos,

Venta de Zopilote, Amula, and Xucumanatlan in Guerrero, Teapa in ‘Tabasco

(H. H. Smith), Northern Yucatan (Gauwmer); Costa Rica, Caché (Rogers).—Evrors '.

Several specimens of both sexes. They agree with European ones, except that

in many of them the rufous coloration of the oral margin is extended over the whole

face; the antenne are more or less rufous, and in the females the vertex is usually

metallic. Dorso-central bristles are present.

2. Lucilia cornicina.

Musca cornicina, Fabr. Spec. Ins. ii. p. 488+; Syst. Antl. p. 289°.

Lucilia cornicina, Schin. Faun. Austr., Dipt.i. p. 590°; van der Wulp, Tijdschr. voor Ent. xxvi.

p: 39 *.

Musca cesarion, Meig. Syst. Beschr. v. p. 57°.

Lucilia carolinensis, Rob.-Desv. Essai sur les Myod. p. 457°.

Somomyia argentifera, Bigot, Ann. Soc. Ent. Fr. 1877, p. 251°.

Hab. Norta Amertca, Quebec*, Carolina ®— Mexico, Ciudad in Durango (forrer),

Santiago Iscuintla in Jalisco (Schumann), Amula, Xucumanatlan, and Omilteme in

Guerrero (H. H. Smith), Patzcuaro (Ff. D. Godman), Jalapa (M. Trujillo), Orizaba

(F. D. Godman and H. H. Smith).—Evrors *?°. |

Several specimens of both sexes.

The tegule are white, but seen from behind they often appear to have a yellowish

tinge (argentifera, Big.). Dorso-central bristles are present.

In addition to these cosmopolitan species, which are abundantly represented in

the Central-American collections before me, there are still a few specimens which

I have attempted in vain to identify with any of the described forms. I abstain,

however, from naming them, preferring to give at present no more than a brief

indication of these forms, because I have but a single specimen or only one sex at

my disposal.

Lucilia, sp.—Two females from Mexico, Northern Sonora (Morrison) and Mexico

city (1. H. Smith).

Size of ZL. ewsar, and with the general coloration of the body similar, but the head

blackish and the front much broader; antenne and palpi rufous. The dorso-central

bristles are inconspicuous, being not longer than the pilosity of the thoracic dorsum ;

the subhumeral cicatrix is yellow (in ZL. cesar and L. cornicina the dorso-central bristles

are distinct and the subhumeral cicatrix is black).

LUCILIA.—PYRELLIA. 299

Lucilia, sp—A single male specimen, from Mexico, Teapa in Tabasco

(H. H. Smith).

Length no more than 4'5 millim. Metallic-violet, the last two abdominal segments

bluish-green ; head ochraceous; eyes coalescent, the facets on the disc not enlarged ;

antenne brown, their basal joints rufous; subhumeral cicatrix yellowish. Wings with

~ an interrupted brownish costal patch, which at the end of the second vein is somewhat

extended over the tip of the wing.

Lucilia, sp.—A single male specimen from Costa Rica, Caché (Rogers).

It agrees with the preceding in the coloration of the wings, the ochraceous head,

the coalescent eyes, and the yellow subhumeral cicatrix; but it is of much larger

size (7-5 millim.) and of a bright metallic-green colour, with obscure violet hind-

borders to the abdominal segments. The front legs are rufous. Dorso-central bristles

are absent.

Lucilia, sp.—A single male specimen from Mexico, Northern Yucatan (Gaumer).

Length 7 millim. Metallic-purple; head ochraceous; antenne rufous; eyes

coalescent on the vertex; subhumeral cicatrix blackish ; dorso-central bristles distinct ;

legs piceous ; wings brownish-grey, without markings.

PYRELLIA.

Pyrellia, Robineau-Desvoidy, Essai sur les Myodaires, p. 462 (1830).

1. Pyrellia suspicax.

Pyrellia suspicaz, Walk. Trans. Ent. Lond. new ser. v. p. 312 ( g) (1861) *.

Pyreilia iris, Bigot, Ann. Soc. Ent. Fr. 1878, p. 36 (¢? )*.

Hab. Mexico 12, Sierra de las Aguas Escondidas 7000 feet and Omilteme 8000 feet,

both in Guerrero (H. H. Smith), Orizaba (H. H. Smith and FP. D. Godman).

Four male and two female specimens. Walker’s description of the male agrees

with the specimens before me. Of the two black marks on the costa, one is imme-

diately beyond the humeral cross-vein, the other at the end of the auxiliary vein; they

are present in both sexes, but not very conspicuous. Bigot, in his description of

P. iris (@), makes no mention of these markings, but for the rest his description

applies, as, for instance, the dark tegule.

The thoracic dorsum has distinct dorso-central bristles; in the male the eyes are

nearly coalescent and their central facets are larger than the others.

800 DIPTERA.

9. Pyrellia scapulata.

Pyrellia scapulata, Bigot, Ann. Soc. Ent. Fr. 1878, p. 835’; Gigl.-Tos, Mem. R. Accad. Scienze di

Torino, ser. 2, xlv. (sep.) p. 7’.

Hab. Mrxico!2, Presidio (Forrer), Santiago Iscuintla in Jalisco (Schumann), Rio

Papagaio, Rincon, Venta de Zopilote, and Tepetlapa in Guerrero, Atoyac in Vera

Cruz, Teapa in Tabasco (H. H. Smith).

Several specimens of both sexes. The arista is of the same yellowish-rufous colour

as the antenne. The thoracic dorsum is densely clothed with black hairs, but is

without dorso-central bristles. In a few female specimens the legs are reddish-brown,

but usually they are black, with the knees (especially of the front pair) rufous. The

blackish frontal band in the female is narrowed towards the antenne.

3. Pyrellia ——?

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

Two female specimens. They agree with the females of P. scapulata, but the sub-

humeral cicatrix and the knees are not rufous.

GRAPHOMYIA.

Graphomyia, Robineau-Desvoidy, Essai sur les Myodaires, p. 403 (18380).

1. Graphomyia mexicana, (Tab. VII. fig. 17.)

Graphomyia mexicana, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 9’.

Hab. Mexico}, Rincon in Guerrero 2800 feet, Teapa in Tabasco (H. H. Smith).

One male and two female specimens. ‘This insect is nearly allied to the European

G. maculata, L., and perhaps may prove to be no more than a local variety of it. The

female agrees with it almost in all respects, and the male differs only in the less

rufous coloration of the abdomen.

MESEMBRINELLA.

Mesembrinella, Giglio-Tos, Boll. Mus. Zool. Anat. comp. di Torino, viii. no. 147, p. 4 (1898).

The distinctive characters between Mesembrinella and the old genus Mesembrina,

Meig.—as they are exposed by Giglio-Tos [/. ¢., and in Mem. R. Accad. Scienze di

Torino, ser. 2, xlv. (sep.) p. 11],—were not at first very clear tome; but a recent

paper by Prof. Brauer (Sitz. Ber. Akad. Wiss. Wien, civ. p. 594) shows that there

exist, especially in the bristles of the thorax, striking differences, which fully justify

the separation.

In the Central-American collections before me two species of the genus Mesembrinella

are represented.

MESEMBRINELLA.—MORELLIA. 301

1. Mesembrinella bicolor. (Tab. VII. fig. 18.)

Mesembrinella bicolor, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 11,

figg. 1, 1 bis.

Hab. Mexico!; Costa Rica, Caché (Rogers).

Two female specimens. They agree perfectly with the ample description of Giglio-

Tos, except that the posterior cross-vein is not distinctly bisinuate, but nearly straight,

a difference which does not seem of sufficient importance to consider them as belonging

to another species.

2. Mesembrinella eneiventris, s ¢. (Tab. VII. figg. 19, 19a, head in

profile.)

Dexia eneiventris, Wiedem. Aussereur. Zweifl. Ins. ii. p. 376°.

Hab. Mexico, Northern Yucatan (Gawmer).—Braziu}.

A long series of specimens of both sexes. This insect is very closely allied to

M. bicolor, the two species resembling one another in their general habitus and

coloration (yellowish-testaceous, with the abdomen, except its base, metallic-blue). In

M. bicolor the first vein reaches further on the costa, on account of which the medi-

astinal cell is more elongate; besides this, MW. bicolor is of a somewhat larger size

(length 10-11 millim.) than V. eneiventris (9 millim.).

To Wiedemann’s description of the latter! may be added :—The front of the male

is triangular, extended upwards in a white linear prolongation, scarcely separating the

eyes, that of the female as broad as the eyes and with parallel sides; inferior part

of the cheeks narrow (equalling about one-sixth of the longitudinal diameter of the

eyes); vibrissee nearly at the oral margin; beard yellow; antennz inserted on the

median line of the eyes, the third joint more than twice as long as the second. In the

female the metallic coloration on the abdomen usually occupies nearly the whole of

the second and following segments. The tarsi are brownish towards the tip, the

foot-claws and pulvilli slightly elongate in the male. The apical cross-vein is close

to, and parallel with, the margin of the wing; the posterior cross-vein is somewhat

undulate.

MORELLIA.

Morellia, Robineau-Desvoidy, Essai sur les Myodaires, p. 405 (1830).

This genus agrees with the two preceding in having the rounded curvature of the

fourth vein forming a distinct apical cross-vein, and the apical cell moderately opened

a little before the tip of the wing. From Graphomyia it may be known by the absence

of the carina separating the antenne at their base; and from Mesembrina and Mesem-

brinella by the middle tibiz being without a bristle on the inner side.

bly

Vay

Iyer? as

802 DIPTERA. |

Macquart (Suites 4 Buffon, ii. p. 274) united all the| Muscide with a rounded

curvature of the fourth vein, with the exception of Paraliia (wich he added to Lucilia)

and Mesembrina, in a single genus under the name Curto It included the genera

Graphomyia, Dasyphora, Morellia, and Muscina, Rob.-Desv., and, in addition, Musca

meditabunda ; for this latter the genus Myiospila, Rondani, was subsequently established.

Schiner (Fauna Austriaca, Diptera, i.) separated Graphomyia, Dasyphora, and Myio-

spila, but for the rest he adopted the genus Curtoneura (amended by him to Cyrtoneura).

Nevertheless, he distinguished in it two typical forms, characterized by a different

neuration, represented by the genera Morellia and Muscina, Rob.-Desv. This differ-

ence, however, seems to be so evident that a similar generic separation made by

Robineau-Desvoidy is perhaps fully justified, and the genus Cyrtoneura, Macq., which

includes some heterogeneous forms, may thus be abandoned.

1. Morellia callimera.

Cyrtoneura callimera, Bigot, Bull. Soc. Zool. Fr. 1887, p. 615°.

Cyrtoneurtta callimera, Gig).-Tos, Mem. R. Accad. Scienze di Torino, ser, 2, xlv. (sep.) p. 12”.

Hab. Mexico!, Amula 6000 feet, Xucumanatlan 7000 feet, Sierra de las Aguas

Escondidas 7000 feet, and Omilteme 8000 feet, all in Guerrero (H. H. Smith).

Several specimens of both sexes. Most of them measure 7°5 millim. in length, but

a female from Xucumanatlan is only 5 millim.; Bigot gives 9 millim.

2. Morellia sarcophagina, sp.n.,¢. (Tab. VII. fig. 20,3.) = Faynl hn in cm

Grey ; abdomen posteriorly ochraceous ; four thoracic stripes, a dorsal line and various spots on the abdomen,

antenne, palpi, and legs black.

Length 6 millim.

Head flattened anteriorly ; front black, linear, with weak bristles over its whole length; face and cheeks

whitish ; vibrissee inserted at the oral margin; some short bristles above them; eyes descending nearly

to the underside of the head, the discal facets scarcely larger than the others. Antenne black, inserted

a little beneath the median line of the eyes; second joint prominent, with short bristles; third joint

three times as long as the second; arista densely plumose, thickened at the base. Proboscis and palpi

black. Thorax black, slightly metallic, grey-pollinose, and with four black stripes, the interspace

between the two median stripes broad; the thoracic dorsum densely hairy, the dorso-central bristles

rather inconspicuous. Scutellum black, somewhat metallic. Abdomen ovate; the first and second

segments grey, the last two segments ochraceous; an uninterrupted black dorsal line and several

blackish spots adjacent to it; hind-borders of the second and third segments blackish, with short bristles

and lateral macrochete. Legs black; hind tibie on the outer side hairy and with some longer bristles ;

foot-claws and pulvilli short. Tegule yellowish-grey. Wings greyish-hyaline, with a brownish tinge

along the costa; small cross-vein under the end of the first vein and a little beyond the middle of the

discal cell ; apical cross-vein straight ; posterior cross-vein slightly undulate.

Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith).

Two male specimens.

Lek (aun YN yon min Ww Qeercr The \ Leng fal Ay ooh be A toa, whee | iN Uy

? a ‘

WAL © ea ha Tat NRA Ws y 4 oe Chel Luka AV he ches yew nGtea yea .

MYIOSPILA.—HEMICHLORA. 503

MYIOSPILA.

Myospila, Rondani, Dipt. Ital. Prodr. i. p. 91 (1856).

In this genus the apical cross-vein is not very conspicuous, the fourth vein being

curved upwards at its extremity only and the apical cell widely opened exactly at (not

before) the tip of the wing. From the following three genera, which have a very

similar neuration, it is distinguished by the pilosity of the eyes.

1. Myiospila meditabunda.

Musca meditabunda, Fabr. Spec. Ins. ii. p. 444+; Syst. Antl. p. 297?; Meigen, Syst. Beschr. v.

p-. 79°.

Myospila meditabunda, Schiner, Faun. Austr., Dipt. i. p. 598%.

Hab. Mexico, Ciudad in Durango (Forrer), Orizaba (H. H. Smith and F. D. Godman),

Amula 6000 feet and Xucumanatlan 7000 feet, both in Guerrero (H. H. Smith).—

Europe}.

Several specimens of both sexes. They agree perfectly with European ones.

HEMICHLORA, gen. nov.*

Front flattened, not prominent, a little narrower than the eyes(@), longer than the face; frontal bristles

weak; no orbital bristles. Cheeks narrow; vibrissee at the oral margin, which is slightly prominent ;

some shorter bristles above and beneath them. Eyes bare, descending nearly to the inferior part of the

head ; the median facets larger than the others. Antenne inserted on the median line of the eyes; third

joint double as long as the second; arista long, short-plumose on the upperside only. Proboscis with

retracted terminal lips; palpi cylindrical. Thorax quadrate, with rounded angles; dorso-central bristles

distinct. Scutellum semicircular, with marginal macrochete. Abdomen short-ovate, broader than the

thorax, without macrochete. Legs slender, with a few weak bristles ; no bristle on the inner side of the

middle tibie. Tegule proportionately small. Wings longer than the abdomen; small cross-vein under

the end of the first vein and a little beyond the middle of the discal cell ; curvature of the fourth vein

rounded and near its termination ; apical cell widely opened at the tip of the wings.

This new genus is established for Cyrtoneura vittigera, Big., which in many respects

agrees with the second section of Cyrtonewra (in the sense of Schiner’s ‘ Fauna

Austriaca’), or the genus Muscina, Rob.-Desv.; but differs in its peculiar coloration

(testaceous, with the last segments of the abdomen metallic-blue) and in having the

arista plumose on the upperside only +.

According to Bigot, the male has a very narrow front and the eyes coalescent.

* jue (half); yAwgds (green).

Tt This most essential character is not mentioned either by Bigot or by Giglio-Tos. Mr. G. H. Verrall, who

has acquired the collection of the late M. Bigot, has been kind enough to examine the typical (¢d) specimen

of Cyrtoneura vittigera, and he informs me that it has the arista plumose on the upperside as in the female

specimens before me. Dr. Giglio-Tos has also, at my request, examined the female examples described by

him and finds that they have the arista similarly.formed. . Loe

304 DIPTERA.

1. Hemichlora vittigera. (Tab. VII. figg. 21,¢ ; 21, head in profile.)

Cyrtoneura vittigera, Bigot, Bull. Soc. Zool. Fr. 1887, p. 613 (d)’.

Cyrtoneurina vittigera, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 13 (2)

Thoracic dorsum brown, with four black stripes before the transverse suture, the interspaces between which

are whitish-grey; pleure testaceous. Face, cheeks, and lateral front-margins rufous, with white

reflections ; frontal band of the Q obscure rufous. Antenne, proboscis, palpi, and legs yellowish-rufous.

Scutellum brown, laterally black. First: and second abdominal segments testaceous, slightly transparent ;

the following segments metallic-blue. Tegule testaceous. Wings with a yellowish-brown tinge.

Length 8°5 millim.

Hab. Mexico12, Amula in Guerrero 6000 feet (H. H. Smith); Guatemaua, San

Gerénimo (Champion).

Two female specimens. A third female, from the latter locality, is evidently

immature and not fully coloured. This was perhaps the case with the male specimen

described by Bigot, as he says!: “wholly pale rufous, except the posterior segments

of the abdomen, which are obscure violet,” and “ wings very pale yellowish.”

MUSCINA.

Muscina, Robineau-Desvoidy, Essai sur les Myodaires, p. 406 (18380).

In Muscina, as in the two preceding genera, the apical cross-vein is reduced to a

rather short curvature near the termination of the fourth vein, and the apical cell is

widely opened at the tip of the wings. From Myiospita it differs in having no pilosity

on the eyes ; from Hemichlora in having the arista plumose on the underside, as well as

on the upperside, and in the total absence of metallic coloration on the abdomen.

The genus Muscina forms the second section of Cyrtoneura in the sense of Schiner’s

‘Fauna Austriaca,’ Diptera.

1. Muscina linea, sp.n., ¢ 2. (Tab. VII. fig. 22, ¢ .)

Testaceous ; thoracic dorsum cinereous, with dark lines; second abdominal segment with a blackish dorsal

stripe; third and anal segments blackish ; antennz, palpi, and legs rufous.

Length 8 millim.

Head rufous, with silvery reflections; frout of the g forming a small triangle, the eyes being coalescent, that

of the 2 as broad as the eyes, with parallel sides, pale rufous-grey ; frontal bristles weak, in the g on

the frontal triangle only. Face perpendicular ; vibrisse inserted nearly at the oral margin, which is

slightly prominent; above the vibrisse some short bristles ; cheeks narrow, their inferior part linear in

the ¢, equalling one-sixth of the longitudinal diameter of the eyes in the 2, in both sexes with some

black bristles ; beard yellow. Facets of the eyes somewhat larger in the ¢ than in the 9. Antenne

yellowish-rufous, inserted on the median line of the eyes; basal joints with a bristly hair; third joint

from two to three times as long as the second; arista brown, longer than the antenna, thickened at the

base, thinly plumose. Proboscis and palpi yellowish-rufous, the proboscis sometimes partly brown ; palpi

flattened, in the 9 much broader than in the ¢. Thorax, scutellum, and abdomen yellowish-testaceous ;

thoracic dorsum cinereous, with four blackish stripes, the two median linear, the stripes becoming more

confused behind the transverse suture ; dorso-central bristles behind the suture to the number of four in

each row. Abdomen ovate or cordiform, broader than the thorax; first and second segments slightly

transparent; on the second a blackish dorsal line; third and anal segments blackish-brown, the third

MUSCINA.—CLINOPERA. 305

with a yellowish front-border and with a row of marginal macrochete; the anal segment with discal

and marginal macrochete. Legs rufous; middle femora of the ¢ with two or three strong but not very

long bristles near the apex on the hinder side (absent in the 2); hind tibize with a bristle beneath the

middle on the outer side ; tarsi infuscate towards the tip ; foot-claws and pulvilli short in both sexes, the

pulvilli whitish. Tegule yellowish. Wings broad, yellowish-hyaline ; small cross-vein under the end of

the first vein and beyond the middle of the discal cell; third vein slightly arcuated ; curvature of the

fourth vein rounded and forming a short apical cross-vein ; apical cell widely opened at the tip of the

wing; posterior cross-vein slightly undulate, in the middle between the small cross-vein and the curvature

of the fourth vein. In some specimens, especially males, the small cross-vein, and also the posterior

cross-vein, but less distinctly, have a brown shadow.

Hab. Mexico, Tierra Colorada 2000 feet, Amula 6000 feet, Xucumanatlan 7000

feet, Sierra de las Aguas Escondidas 7000 to 9500 feet, and Omilteme 8000 feet, all in

Guerrero (H. H. Smith).

Several specimens of both sexes.

Two male specimens, from Tierra Colorada, differ from the others in having fuscous

legs, a more obscure abdomen, and a shining black proboscis, the black dorsal stripe

being also indistinct. ‘They seem to form a transition to the following species; but

as they have the eyes coalescent, I regard them as a dark variety of Muscina linea. —

9. Muscina tripunctata, spn. ¢ ¢.

Cinereous; thoracic dorsum with dark lines; abdomen testaceous or cinereous, with a blackish dorsal point

on the second and following segments; antennee and palpi rufous.

Length 7 millim. .

Allied to the preceding species and in many characters agreeing with it. The eyes of the gd are not quite

coalescent, but separated by a narrow line, and the frontal bristles form a double row over the whole

length of the front; the front of the @ is a little broader and has a blacker coloration; the proboscis is

blackish-brown, very shining. Thorax more generally cinereous, with yellowish shoulders, the dorsal

stripes often diffuse. Scutellum brown, with yellowish tip. Abdomen more obscure and cinereous, with

a blackish point on the second and following segments ; in a few specimens these points become somewhat

elongate, almost forming an interrupted dorsal stripe. The legs are often more or less infuscate.

Hab. Mexico, Amula, Xucumanatlan, and Omilteme in Guerrero, Cuernavaca in

Morelos (H. H. Smith), Northern Yucatan (Gawmer).

Several specimens of both sexes.

CLINOPERA, gen. nov.*

Head semiglobular; front not at all prominent—in the ¢ very small, triangular, with the eyes nearly or

-quite coalescent above it, in the 2 as broad as the eyes; frontal bristles in the ¢ on the triangle above

the antenne only. Cheeks narrow, their inferior part linear, densely beset with bristly hairs; vibrisse

at the oral margin; some very short bristles above them. Eyes bare, in the ¢ the facets on the middle

somewhat larger than the others. Antenne inserted on the median line of the eyes; third joint double

the length of the second ; arista plumose on the upper and undersides. Proboscis with developed terminal

lips; palpi small, cylindrical. Thorax quadrate ; dorso-central bristles distinct ; scutellum semicircular,

with marginal macrochexte. Abdomen ovate, with short and weak macrochete, which usually are marginal

on the second and third segments, and discal and marginal on the anal segment. Legs with weak bristles ;

no bristle on the inner side of the middle tibiae; foot-claws and pulvilli short in both sexes. Tegule

* ghéivo (to bend); wépas (apex).

BIOL. CENTR.-AMER., Dipt., Vol. II., June 1896.

306 DEPTERA, |

large. Wings somewhat longer than the abdomen ; mediastinal cell short, before the middle of the

costa; small cross-vein usually beyond the end of the first vein and distinctly beyond the middle of the

discal cell; fourth vein a little curved upwards at its extremity; apical cell broadly opened at the tip of

the wings; sometimes the wings are spotted and the first and third veins have a row of very. minute

bristles.

In this genus the apical cross-vein is inconspicuous; this neuration forms a transition

to that of the following group, Anthomyine. The species are of small size.

1. Wings not spotted 2. 6 6 1 ee ee ee ee ee

Wings with blackish spots . © 2. 2 1 6 7 ee ee ew ee 6

2. Antenne (and palpi) black ; eyes in the ¢ narrowly separated on

the front. . . .... toe ee ee we ewe frontina, v. d. W.

Antenne yellow or red ; eyes in the gd contiguous* . .. .. 38.

8. Palpiblack . 2. 2 2 ew ee ee ee ee ee Ao)

Palpi yellow. . . . . . te ee ee ww ew | aw ona |

4. Thorax with blackish stripes before the transverse suture. . . . wher, Gigl.-Tos. .

Thorax ochraceous and without stripes before the transverse suture. hieroglyphica, v.d.W.

5. Abdomen cinereous, with a black dorsal line . . . . «. . . dorsilinea, v. d. W.

Abdomen cinereous, with two short dorsal stripes on the second and

third segments. . . 6. 1 6 ee ee ew ee ow ee «digramma, v. d. W.

6. Antenne yellow . . . ee woe ee 7,

Antenne black (in C. monstrata the basal joints rufous) ~ ee e 8,

7. Palpiyellow . 2... 1. 1 1 ee we we ew ee ew ew ee tuber, Gigl.-Tos.

Palpi black .) ¥ Br BA EG . .« polystigma, v. d. W.

8. Abdomen with irregular black reflecting spots, two dorsal spots

usually close together on the second and third segments ; palpi

black . . . rn pterostigma, v. d. W.

Abdomen with three black reflecting spots on 1 the second and third

segments ; palpi and basal joints of the antenne rufous . . . monstrata, v.d. W.

1. Clinopera frontina, sp. n., ¢.

Cinereous ; thoracic stripes, spots on the abdomen, antenne, palpi, and legs black; eyes narrowly separated

on the front.

Length 5 millim.

Head whitish, the cheeks with brown reflections; front narrow, but separating the eyes; frontal band black,

linear ; frontal bristles in a continuous row. Antenne black, the second joint slightly rufous; arista

thickened at the base, long-plumose. Proboscis and palpi black. Thorax and scutellum cinereous, the

thorax with four black stripes, which are conspicuous before the transverse suture only ; scutellum with

a black median stripe. Abdomen ovate, cinereous, with some rufous tinge; on the second segment two

black dorsal spots close together; on the third segment two similar spots, though less distinct ; the hind

margin of these segments with a row of black points ; second segment with marginal, the third and anal

segments with marginal and discal, macrochete. Legs black, the knees at their extreme apex somewhat

rufous. Tegule whitish. Wings greyish-hyaline.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single male specimen.

* In the species of which the males are known; C. dorsilinea may prove to differ in this respect.

CLINOPERA. 307.

9. Clinopera uber. _ . |

Cyrtoneurina uber, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, 2 ser. xlv. (sep.) p. 17°. |

Hab. Mexico!, Dos Arroyos 1000 feet, Rincon 2800 feet, Chilpancingo 4600 feet,

Amula 6000 feet, and Omilteme 8000 feet, all in Guerrero, Medellin and Atoyac in

Vera Cruz, Teapa and Frontera in Tabasco (H. H. Smith).

A large series of specimens of both sexes, many of which agree perfectly with the

description. ‘The ground-colour is variable: usually cinereous, but often more yellow

or ochraceous. In some of the specimens the knees, especially of the front pair, or

even the front tibie, are rufous. The basal joints of the antenne are usually

infuscate. | |

This species may perhaps be identical with Anthomyia gemina, Wiedem. (Aussereur.

zweifl. Ins. ii. p. 486). Wiedemann’s description agrees tolerably well, though there

is no mention of the slight curvature of the fourth vein, on account of which the apical

cell is a little narrower at its termination. However, as nothing is said about the

colour of the palpi in Anthomyia yemina, the description is equally applicable to

Clinopera digramma (no. 5, infra), which is nearly allied to C. uber, differing from it

especially in the colour of the palpi, these organs being black in C. wber and yellow in

C. digramma. According to Jaennicke (Neue exot. Dipteren, p. 65), Anthomyta

gemina, Wiedem., probably belongs to the genus Spilogaster.

3. Clinopera hieroglyphica, sp.n. ¢ 9. (Tab. VII. fig. 23, 9.)

Cinereous ; thorax anteriorly ochraceous; abdomen yellow, with blackish markings ; antenne yellow ; palpi

and legs black.

Length 4-5°5 millim.

Face, cheeks, and sides of the front white ; frontal band of the ? forming a double stripe. Antenne yellow ;

arista black, thickened at the base, long-plumose. Proboscis and palpi black. Thorax before the

transverse suture pale ochraceous, without stripes, behind it blackish, posteriorly cinereous ; humeral

tubercles and the cicatrix beneath them yellowish; pleure and scutellum cinereous. Abdomen yellow;

base of the first segment blackish ; the black markings on the second and third segments consisting of two

rather broad dorsal stripes, reaching neither the anterior nor the posterior border and separated in the

middle by a narrow line of the ground-colour; the stripes are posteriorly united with a cross-band, which

laterally is enlarged forwards, but does not cover the hind margins of the segments ; along these margins

is a row of black points, being the roots of hairs; anal segment with blackish reflecting spots. Legs

black ; the knees of the front pair rufous. Tegule and halteres yellowish. Wings greyish-hyaline, in

the ¢ sometimes with a brownish tinge along the costa.

Hab: Mexico, Tierra Colorada in Guerrero, Teapa and Frontera in Tabasco (H. H.

Smith).

Several specimens of both sexes. One of the male specimens differs from the others

in having the palpi yellow; but as the palpi show a tendency to become paler in some

of them, I regard it as a simple variety.

308 DIPTERA.

4. Clinopera dorsilinea, sp. n., 2.

Cinereous; thoracic stripes, a dorsal line on the abdomen, and legs black; scutellum ochraceous at the tip;

antenne and palpi rufous.

Length 6 millim.

Front broader than the eyes, cinereous, with the lateral borders narrowly white ; face and cheeks white, with

dark reflections ; oral margin pale red. Antenne rufous; third joint blackish towards the end; arista

black, thickened to the middle and finely plumose. Proboscis black; palpi yellow. Thorax, scutellum,

and abdomen cinereous ; thorax with four black stripes; hind margin of the scutellum ochraceous ;

abdomen cordiform, flattened, broader than the thorax, with a black dorsal line and lateral blackish

reflecting spots; marginal macrochete on the third, and discal and marginal macrochete on the anal

segment. Legs black. Tegule yellowish-white. Wings greyish-hyaline; small cross-vein under the

end of the first vein; curvature of the fourth vein a little more distinct than in the other species of the

genus.

Hab. Mexico, Amula in Guerrero 6000 feet (H. HZ. Smith).

A single female specimen.

5. Clinopera digramma, sp. n.,¢ ¢.

Yellowish-cinereous or ochraceous ; thorax with indistinct dark stripes; second and third abdominal segments

each with two black dorsal spots; antenne and palpi yellow; legs partly rufous.

Length 4:5-5°5 millim.

Head whitish ; front of the ¢ triangular, very small, the eyes contiguous, that of the 9 as broad as the eyes

and with a broad blackish frontal band ; frontal bristles in the ¢ on the frontal triangle only, in the 9

in a continuous row along the whole front. Antenne yellow; arista black, thickened at the base, long-

plumose. Proboscis black; palpi yellow. Thorax cinereous, with indistinct blackish stripes. Scutellum

cinereous, usually yellowish-rufous at the tip. Abdomen—(< ) ochraceous, the second and third segments

with two black dorsal spots, the other segments beset with black points, which are arranged in a row

along the hind margins—( ) cinereous and more obscure, the spots and points therefore less striking ;

weak marginal macrochete are present on the second and following segments, some discal macrochete

also on the anal segment, Legs dark rufous; the front femora, except the tip, and all the tarsi black.

Tegule yellowish-white. Wings greyish-hyaline, yellowish at the costa; small cross-vein a little beyond

the end of the first vein and distinctly beyond the middle of the discal cell ; posterior cross-vein slightly

concave.

Hab. Mexico, Chilpancingo 4600 feet, and Amula 6000 feet, both in Guerrero

(H. H. Smith), Orizaba (H. H. Smith and F. D. Godman).

Several specimens of both sexes. As to the identification of this species with

Anthomyia gemina, Wiedem., see the note on C. uber (no. 2, supra).

6 Clinopera inuber. (Tab. VII. fig. 24, ¢.)

Cyrtoneurina inuber, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, 2 ser. xlv. (sep.) p. 157.

Hab. Mexico}, Teapa in Tabasco (H. H. Smith).

One male and two female specimens. ‘They agree very well with the ample descrip-

tion of the male!. The male specimen before me is very small (no more than

4 millim.); the females are somewhat larger (5 millim.). In the latter the front is

blackish, nearly as broad as the eyes, and with parallel sides.

CLINOPERA. 309

7. Clinopera polystigma, sp. n., ¢ 9. (Tab. VII. tig. 25, ¢.)

Cinereous ; two black dorsal spots on the second and third abdominal segments ; antenne yellow; palpi black ;

wings with several brown spots.

Length 5-6 millim.

Head white, with some dark reflections ; front of the ¢ triangular, the eyes being nearly contiguous, that of

the 2 as broad as the eyes, with parallel sides and a blackish frontal band. Antenne yellow; arista

densely plumose. Proboscis and palpi black. Thorax, scutellum, and abdomen cinereous; the thorax

with indistinct blackish stripes ; humeral tubercles somewhat rufous; on the second and third abdominal

segments two black dorsal spots ; second and following segments with weak marginal macrochete, which

arise from black points. Legs black, the knees and tibie rufous. Tegule yellowish. Wings greyish,

with the following brown markings: two small spots above each other near the base—one at the origin

of the third vein, the other at the tip of the superior basal cell; a larger spot covering the mediastinal

cell and reaching downwards to beyond the second vein; a broad margin to the small cross-vein; the

posterior cross-vein also margined, the brown colour more extended at its upper and under end; an

oblong costal spot at the end of the second vein; and, finally, a more dilute spot at the termination of

the third vein and a similar spot before the end of the fourth vein. Small cross-vein under the end of

the first vein ; the first_and third veins with a row of minute bristles.

Hab. Mexico, Tierra Colorada in Guerrero 2000 feet, Medellin near Vera Cruz

(H. H. Smith).

One male and two female specimens. :

8. Clinopera pterostigma, sp. n., s 2.

Cinereous ; thoracic stripes, two dorsal spots on the second and third abdominal segments, antenna, palpi, and

legs black ; brown spots on the mediastinal cell and on the small cross-vein.

Length 5 millim.

Head black ; face and sides of the front with silvery-white reflections ; front of the ¢ linear, separating the

eyes, that of the 9 as broad as the eyes. Antenne black, the small basal joints somewhat rufous.

Proboscis and palpi black. Thorax cinereous, whitish on the front border, with some black stripes ;

scutellum brownish-cinereous. Abdomen ovate, yellowish-cinereous ; on the second segment two black

dorsal spots, which in the ¢ are trigonal, in the 2 more rounded; on the third segment two similar

spots, which are less distinct in the @ ; external to these dorsal spots, and also on the anal segment,

there are some blackish reflecting spots; on the second segment are marginal, and on the following two

segments discal and marginal, macrocheta, all arising from black points, the macrochete, however, of a

weak nature. Legs black. Tegule white. Wings greyish-hyaline; a blackish-brown costal spot, filling

nearly the whole of the mediastinal cell; a brown margin to the small cross-vein and also, though less

conspicuous, to the posterior cross-vein ; the posterior cross-vein concave; for the rest the neuration is

normal, agreeing with that of C. inuber (see fig. 24); minute bristles along the first and third veins are

visible (as in C. inuber) under a strong lens. oo

Hab. Mexico, Teapa and Frontera in Tabasco (H. H. Smith).

Two specimens, one of each sex.

9. Clinopera monstrata, sp. n., 2.

Cinereous; thorax with four black stripes; second and third abdominal segments with three black spots ;

antenne black, with the basal joints rufous; palpi rufous; legs brown; small and posterior cross-veins

margined with brown.

Length 6 millim.

Head whitish ; front as broad as the eyes; frontal band blackish, divided into two parts by a whitish median

310 DIPTERA. —

line ; oral margin pale red. Antenne blackish-brown, the two basal joints and also the base of the third

rufous ; arista thickened at the base, finely plumose. Proboscis black; palpi rufous. Thorax, scutellum,

and abdomen cinereous ; thorax with four distinct black stripes; second and third abdominal segments

each with three black spots, the median spot nearly trigonal and sometimes appearing united posteriorly

with the two lateral spots by a short transverse band near the hind margin of the segments; a row

of weak, erect macrochete along the hind-border of the third segment, and several macrochete, also

discal, on the anal segment. Legs blackish-brown, the knees of the front and middle pairs, a large

portion of the hind femora, and all the tibiee more rufous. Tegule whitish. Wings greyish-hyaline ;

the small cross-vein and the posterior cross-vein with a brown margin ; no bristles along the veins.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

A single female specimen.

_ The following species of the group Muscine have been previously recorded from

Mexico :—

Musca flavinervis, Thoms. Eugenies Resa, Dipt. p. 547. no. 178; Gigl.-Tos, Mem.

R. Accad. Scienze di Torino, 2 ser. xlv. (sep.) p. 8 no. 144.

sensifera, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 314.

atrifrons, Bigot, Bull. Soc. Zool. Fr. xii. p. 607 (1887).

Calliphora femorata, Walk. 1. c. p. 310.

secors, Walk. l. c. p. 311.

-—— santhorhina, Bigot, Bull. Soc. Zool. Fr. xii. p. 602 (1887).

prepes, Giglio-Tos, Mem. R. Accad. Scienze di Torino, 2 ser. xlv. (sep.) p. 1.

no. 130.

Lucilia brunnicornis, Macquart, Dipt. Exot. ii. 8, p. 142. no. 15.

nigriceps, Macquart, 1. c. p. 143. no. 16.

—— mexicana, Macquart, 1. c. p. 143. no. 17.

— meridensis, Macquart, 1. c., Suppl. J, p. 199. no. 33.—Merida, Yucatan. |

violacea, Macquart, |. c., Suppl. 2, p. 83. no. 34.

proxima, Walk. Ins. Saund., Dipt. p. 841 (Musca).— California ; Gigl.-Tos,

Mem. R. Accad. Scienze di Torino, 2 ser. xlv. (sep.) p. 4. no. 136.—Mexico.

surrepens, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 312.

pallidibasis, Bigot, Ann. Soc. Ent. Fr. 5° sér. vii. p. 247. no. 26 (1877)

(Somomyia) ; Gigl.-Tos, Mem. R. Accad. Scienze di Torino, 2 ser. xlv. (sep.)

p. 4. no. 187.

mutabilis, Bigot, 1. c. p. 248. no. 27 (Somomyia).

flavigena, Bigot, 1. c. p. 249. no. 28 (Somomyia).

callipes, Bigot, 1. c. p. 249. no. 29 (Somomyia).

— pueblensis, Bigot, 1. c. p. 250. no. 30 (Somomyia).

MUSCINZA. 311

Lucilia fulvinota, Bigot, 1. c. p. 251. no. 31 (Somomyia). oo

quieta, Gigl.-Tos, Mem. R. Accad. di Torino, 2 ser. xlv. (sep.) p. 4. no. 135.

Pyrellia violacea, Fabr. Syst. Antl. p. 288. no. 25 (Musca).—South America ;

| Wiedem. Aussereur. zweifl. Ins. ii. p. 409. no. 43 (Musca).—Brazil ; van

der Wulp, Tijdschr. voor Ent. xxvi. p. 39. no. 6.—Guadeloupe; Gigl.-Tos,

Mem. R. Accad. Scienze di Torino, 2 ser. xlv. (sep.) p. 6. no. 140.—Mexico ;

Brauer & v. Bergenst. Denkschr. k. Akad. Wissensch. Wien, lviii. p. 419

(Cyrtoneura).

Syn. Pyrellia maculipennata, Macq. Dipt. Exot., Suppl. 4, p. 252. no. 12,

t. 23. f. 7; Schiner, Reise Novara, Dipt. p. 304. no. 33; Tyler Townsend,

Ann. N. York Acad. 1892, p. 33 (Cyrtoneura).—Pyrellia specialis, Walk.

Trans. Ent. Soc. Lond. n. ser. v. p. 46 (1857).

ochrifacies, Rondani, Nuovi Annali Scienze Nat. Bologna, 1850, p. 15. no. 14.

—Sebastian I. ; Gigl.-Tos, Mem. R. Accad. Scienze di Torino, 2 ser. xlv.

(sep.) p. 7. no. 142.—Mexico.

Syn. Pyrellia violacea, Rob.-Desv. Essai sur les Myodaires, p. 463.—

Brazil. . |

scordalus, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 313.

—— obscuripes, Bigot, Bull. Soc. Zool. Fr. xii. p. 616 (1887).

Morellia fulvipes, Bigot, 1. c. p. 613 (Cyrtoneura).

nigriceps, Bigot, l. c. p. 615 (Cyrtoneura).—North America; Gigl.-Tos, Mem.

R. Accad. Scienze di Torino, 2 ser. xlv. (sep.) p. 12. no. 151 (Cyrtoneura).—

| Mexico.

Muscina mexicana, Macquart, Dipt. Exot. ii. 38, p. 158. no. 4, t. 21. f. 9 (Cyrto-

neura); Gigl.-Tos, 1. c. p. 13. no. 153 (Cyrtoneurina).

pallidicornis, Bigot, Bull. Soc. Zool. Fr. xii. p. 614 (1887) (Cyrtoneura).

parilis, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, 2 ser. xlv. (sep.) p. 14.

. no. 154 (Cyrtoneurina).

vecta, Gigl.-Tos, 1. c. (sep.) p. 14. no. 155 (Cyrtoneurina).

Clinopera anthomyidea, Bigot, Bull. Soc. Zool. Fr. xii. p. 614 (1887) (Cyrtoneura).

—North America; Gigl.-‘Tos, Mem. R. Accad. Scienze di Torino, 2 ser. xly.

(sep.) p. 15. no. 156 (Cyrtoneurina).—Mexico.

gluta Gigl.-Tos, 1. c. (sep.) p. 15. no. 158 (Cyrtoneurina).

pellex, Gigl.-Tos, l. c. (sep.) p. 16. no. 159 (Cyrtoneurina). |

Hyadesimyia grisea, Gigl.-Tos, 1. c. (sep.) p. 8. no. 145.

As to Calliphora secors, Walk., this species cannot be a true Calliphora, the curvature

of the fourth vein forming a “rounded and very obtuse angle.’ It seems to be a

Mesembrinella.

The genus Hyadesimyia was founded by Bigot on two species from the extreme

312 DIPTERA.

southern part of America (Mission Scient. du Cap Horn, vi. Zool., Diptéres, Paris,

1888). In the naked arista it seems to approach the Tachinine, but on account of the

absence of macrochete on the abdomen the author has included it among the Muscine.

I mention the genus because Giglio-Tos has placed in it a third species (H. grisea),

from Mexico.

Brauer and von Bergenstamm (Denkschr. k. Akad. der Wissensch. Wien, lvi. p. 161)

are of opinion that /Tyadesimyia may belong to the family (stride, in the neighbour-

hood of Cephenemyia and Rogenhofera.

Group ANTHOMYINE. -

This group concludes the long series of Muscide Calyptere. ‘The flies belonging

to it have generally the same aspect of those of the preceding groups, but differ from

them in the want of the apical cross-vein, the fourth vein not being curved upwards,

but going in a linear or nearly linear direction towards the border of the wing, some-

what below the tip. It must, however, be observed that this character cannot always

be relied upon, as several Muscine present a similar form of neuration, and, on the

contrary, in some genera of Anthomyine (e. g. Leucomelina) the fourth vein shows a

strong tendency to an upward curvature *.

In the Anthomyine the arista is sometimes plumose, but often simply pubescent or

even bare. In some genera the eyes are contiguous or close together in the males, in

others they are separated by the front in both sexes. The abdomen usually has no

more than four visible segments, but sometimes a fifth segment becomes more or less

conspicuous at the base; the macrochete are often more developed than in the

Muscine.

The genera of Anthomyine occurring in Central America may be tabulated as

follows :—

1. Eyes in the ¢ close together above, the front being reduced to a

small triangle or at least much narrower than the transverse

diameter of the eyes; in the g the front broader . . ... 2

Eyes separated in both sexes, the front nearly or quite as broad as

theeyes. 6 6 ee ee ee ee ee ee ee ee Bz

* A new scheme for the separation of the Anthomyine, and also for the division of the Muscide Calypterze

into groups, has been recently proposed by E. Girschner [Berliner ent. Zeitschrift, xxxviil. p. 207 (1893), and

Ilustrirte Wochenschrift fiir Entomologie, p. 12 (April 1896)]. The number and disposition of the bristles

on the thorax are treated by him as of primary importance, and a general modification of the system is the

consequence. It isa valuable attempt to reform the most generally adopted, though defective, systematic

arrangement of the Muscide Calyptere. For the purpose of the present work, however, it will be sufficient

to retain the groups, and also that of the Anthomyine, as they are defined by Schiner in his ‘ Fauna Austriaca:

Diptera.

ANTHOMYINA. 313

. Tegule unequal ; the lower scale extending beyond the upper. . 3.

Tegulee equal, the lower scale wholly covered by the upper. . . 15.

. Abdomen of the ¢ ovate or conical, on the dorsal side with four

visible segments ; the first segment not longer than the second. 4.

Abdomen of the ¢ elongate, the first segment longer than the

11. Eyes pilose. Trichophthicus, Rond. “3% <

- Eyes bare . Co ee ee ee ee we ee ww TR,

12. Anal vein short; the axillary vein roundly curved towards the

anal vein oe oe oe Homalomyia, Bouché. 470 |

Anal vein long and often reaching the border of the wing 13. |

13. Arista plumose 2... 6 ee ee ee ee es Hydrophoria, Rob.-Desv.3 7) "1.

Arista bare or pubescent . . . . oe 14.

14. Oral margin and underside of the head ‘thiekly clothed with

bristly hairs . . . . . Pogonomyia, Rond, “3% cf

Oral margin and underside of the head with only the usual bristles. Anthomyia, Meig. *) 7357

15. Eyes pilose. Lasiops, Meig. 372"

Eyes bare 2. . 1 6 ee ee eee ee 16.

16. Arista plumose Hylemyia, Rob.-Desv.% 2")

Arista bare 17.

17. Abdomen of the g subeylindrical Chortophila, Macq. 7°»)

Abdomen oblong, depressed . Loe eee . Phorbia, Rob.-Desv.”? ~ }

18. Small cross-vein before the end of the first vein (large species) Charadrella, v. d. Wulp. ay)

Small cross-vein under or beyond the end of the first vein . 19.

19. Palpi unusually enlarged towards the tip . Lispe, Latr. 244%

Palpi of usual shape (cylindrical or filiform) . . . . . 20.

20. Tegule unequal; the lower scale extending beyond the upper . Cenosia, Meig. a ~

second and sometimes showing a basal separation .

. Abdomen ovate, not spotted .

Abdomen subconical, with distinct blackish spots .

. Front femora in the 3 denticulate or excavated

Front femora simple in both sexes .

. Abdomen shining black or metallic. .

Abdomen of more clear coloration and with blackish markings .

. Vibrissee inserted at some distance above the oral margin

Vibrisse inserted at the oral margin

. Fourth vein nearly or quite straight

Fourth vein distinctly curved upwards before its end .

Tegule equal; the upper scale covering the under .

BIOL. CENTR.-AMER., Dipt., Vol. I1., October 1896,

ll.

Eyes pilose Hyetodesia, Rond. >! 4

Eyes bare . 5.

. Arista plumose re 6.

Arista bare or simply pubescent . 7.

Mydea, Rob.-Desv. 2 'l-

Spilogaster, Macq. 2! 4

Hydrotea, Rob.-Desv. 9% L

Ophyra, Rob.-Desv. 22-3

Brachyophyra, Gigl.-Tos. 2“

10.

Limnophora, Rob.-Desv. ~.’

Leucomelina, Macq. >i,

Schenomyza, Hal. 7) 44,

alt

aneen

fad,

314 DIPTERA.

HYETODESIA.

Yetodesia, Rondani, Dipt. Ital. Prodr. vi. p. 110 (1877).

This genus is identical with Aricia, Schiner (Faun. Austr., Dipt. i. p. 599),

after the abstraction of A. lardaria, Fabr., which has been separated by Rondani

under the generic name Polietes. It includes Anthomyine with nearly or quite

contiguous eyes in the male sex, a broadly ovate abdomen, a plumose arista, and

pilose eyes. |

Five species from Central America are known to me:—

1. Wings with a distinct blackish cloud on the two cross-veins . . . . 2.

Wings without blackish cloud, a slight shadow at the small cross-vein

excepted 2 6. 6 6 ee ee ee ee ee ee eee

2. Palpired . 2. 1. 1 ee wee ee eee ee wwe we rebel, Vv. A. Walp.

Palpi black . 2. 2. 1. 2 ew ew ee ee we ee ee ee

3. Legs almost wholly black. . . . . . . ee ee ee ee .) «6muleata, Gigl.-Tos.

Legs yed . . ww ee ee ee ee ee eee ee ee procedens, Walk.

4, Arista and eyes short-haired. . . . . 1. 2 ee ee ee ee) dongiseta, v. d. Wulp.

Arista and eyes long-haired . . . . . . 1. «w+ «abacta, Gigl.-Tos.

1. Hyetodesia rubella, sp.n., 9. (Tab. VIII. figg. 1; la, head in profile.)

Cinereous ; thorax with four black stripes; scutellum rufous; base of the abdomen yellowish; anal segment

rufous; cross-veins clouded with black.

Length 7 millim.

Front as broad as the eyes, with parallel sides; frontal band black, bifid towards the vertex; face whitish,

perpendicular ; vibrissee inserted at the oral margin, which is not prominent; lower part of the cheeks

under the eyes narrow and with many bristles; eyes short-haired. Antenne inserted a little above the

median line of the eyes; basal joints rufous; second joint exserted into a point and having a small

bristle ; third joint reaching to near the vibrisse, brownish, except its basal part, which is rufous ; arista

as long as the antenna, thicker at the base and with long hairs. Proboscis black; palpi pale rufous,

rather long, cylindrical, slightly eularged towards the tip. Thorax cinereous, with four distinct black

stripes; scutellum rufous, blackish at the base, with many discal and marginal macrochete. Abdomen

ovate ; the first two segments yellow and slightly transparent, with a black hind border, which is narrow

on the first segment, and on the second much broader and prolonged in the middle, limiting the yellow

ground-colour to a pair of large lateral spots; third segment black, with cinereous reflections; anal

segment rufous; macrochete present at the hind margin of the third segment and on the whole surface

of the anal segment. Legs black or piceous; the tips of the femora and the front tibie dark rufous ;

front femora with a row of bristles on the upper and under sides; all the tibia with spurs, the

middle and hind tibiee with some bristles ; foot-claws and pulvilli short. Tegule whitish. Wings grey,

slightly brownish along the costa; small cross-vein under the end of the first vein and a little beyond the

middle of the discal cell; posterior cross-vein slightly undulate; both cross-veins bordered with dark

brown.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single female specimen.

HYETODESIA. 315

2. Hyetodesia mulcata.

Hyetodesia mulcata, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 20°.

Hab. Mexico}, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith).

A single male specimen from Guerrero. This has the face and frontal margins

whitish, not silvery; the black stripes on the thorax equally distinct before the

transverse suture, the two median stripes not narrower than the outer ones; and the

hind femora black, with a rufous tip, like the other femora. Notwithstanding these

discrepancies from the description, the example before me is probably referable to

H. muleata.

3. Hyetodesia procedens.

Aricia procedens, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 315 *,

Hyetodesia procedens, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 20”.

Hab. Mexico 12, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith).

Five female specimens. Walker’s description applies to these, except that the head

is not white, but obscure cinereous. The black spots on the abdomen are placed two

on the second and two on the third segment, and, in addition, all the segments have,

at the sides, blackish reflecting spots. ‘The femora have on the upperside a black

stripe, which on the front pair extends over their whole length, but on the middle and

hind pairs only towards the tip. The wings are brownish-grey and have a small

costal spine.

I suspect that H. mulcata and H. procedens are the two sexes of the same species.

Save the usual sexual ditferences, and the much more exteuded rufous coloration of

the legs in H. procedens, they are very similar. Moreover, the specimens before me.

are all from the same locality and captured in July.

4, Hyetodesia longiseta, sp. n., ¢.

Cinereous; thorax with four black stripes ; abdomen with four black spots; antenne, palpi, and legs rufous,

the tarsi and base of the front femora black.

Length 7 millim.

Eyes short-haired, contiguous on the front, which is reduced to a small triangle; face cinereous, with some

white reflections; vibrisse just at the oral margin, which is not prominent; cheeks narrow ; underside of

the head with many bristly hairs. Antenne inserted on the median line of the eyes, brownish-rufous,

the basal joints nearly black; third joint not reaching the vibrisse ; arista distinctly longer than the

antenne, short-plumose. Palpi rufous, small. Thorax, scutellum, and abdomen cinereous; on the

thorax before the transverse suture are four black stripes, the two median sometimes appearing double.

Abdomen ovate; second and third segments each with two triangular black markings; anal segment and

the sides of the preceding segments with blackish reflections ; third segment with a row of marginal

macrocheetee ; several macrochet and bristly hairs on the surface of the anal segment and laterally on

all the other segments. Legs slender, rufous; the coxe, the base of the front femora, and all the tarsi

black ; middle femora narrowed towards the apex, with a row of bristles on the underside; the other

femora with bristles on the upper and under sides ; tibie with three or four spurs, the middle and hind

282

316 DIPTERA.

pairs also with a few bristles; foot-claws and pulvilli elongate, the pulvilli yellowish. Tegule whitish.

Wings brownish-grey ; small cross-vein slightly infuscate, under the end of the first vein and beyond the

middle of the discal cell; posterior cross-vein distinctly undulate.

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith).

A single male specimen.

5. Hyetodesia abacta.

Hyetodesia abacta, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 20 -

Hab. Mexico}, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith).

A single male specimen. The pilosity of the eyes is longer than in any of the

preceding species; the arista is also long-plumose.

MYDAA.

Mydea, Robineau-Desvoidy, Essai sur les Myodaires, p. 479 (1830).

This genus is closely allied to the preceding, only differing from it in having the

eyes bare. Schiner and Rondani have united it with the following, Spilogaster. From

this latter it may be known by the broader form and by the want of symmetrical

markings on the abdomen.

Six species from Central America are represented in the collections before me :—

}. Palpirufous 2. 2... 6 ee ww ew ee we ee

Palpi black. 2. 2. 1. 1. ww ee ee ee ee ee ee

2. Fulvous species . . . . 6. 2 6 © ew we ew ee et ee pansa, Gigl.-Tos.

Cinereous or black species. . . - . 38.

3. Third and fourth veins distinctly divergent towards ‘the end . a obscura, v. d. Wulp.

Third and fourth veins nearly parallel towards the end . . . . 4

4, Legsrufous. 2. 2. 2. 1. 1. 6 we ew we we we ee CONCINNA, V. d. Wulp.

Legs piceous or black . . . . . . » 2 2 e «© 6fasciventris, v. d. Wulp.

5. Antenne black ; vibrissze inserted above the oral margin . . leucocephala, v. d. Wulp.

Antenne rufous ; 3 vibrisse inserted at the oral margin . . . . confinis, v.d. Wulp.

1. Mydza pansa. (Tab. VIII. figg. 2, 6; 2a, 9; 26, head in profile, 9.)

Spilogaster pansa, Gig].-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 24’.

Fulvous ; thorax with four black or brown stripes, in the male cinereous; hind borders of the second and

third abdominal segments brown; antenne, palpi, and legs rufous.

Length 9 millim.

Front whitish-grey—in the male very narrow, scarcely separating the eyes, with the blackish frontal band

reduced to a thin line—in the female as broad as the eyes, with the frontal band black, bifid on the

vertex. Face and cheeks fulvous, with white reflections, the face perpendicular; vibrisse inserted at the

oral margin, which is not prominent; behind the vibrissz is a row of shorter bristles ; lower part of the

cheeks under the eyes narrow; beard yellow. Antenne yellowish-rufous ; second joint with some

bristles ; third joint linear, three times as long as the second, and reaching to near the vibrisse; arista

fulvous, short-haired. Proboscis brown; palpi yellowish-rufous, cylindrical. Thoracic dorsum in the

male cinereous, with four distinct black stripes, of which the two lateral are prolonged behind the trans-

MYDAA. 317

verse suture; before the suture the ground-colour is somewhat whitish, at the sides and near the hind

border of the thorax more or less rufous ; sometimes the two median stripes have also a reddish tinge ;

in the female the thorax is fulyous, with brown stripes; there are two dorso-central bristles before, and

four behind, the suture. Scutellum rufous, with a more or less distinct blackish basal spot. Abdomen

of the male ovate, yellowish-rufous, with a blackish dorsal stripe and narrow hind margin to the second

and third segments; anal segment brown. Abdomen of the female pointed towards the tip, without

dorsal stripe, but with the black hind margins to the second and third segments broader, and sometimes

having a triangular projection in the middle. In both sexes the third segment has a row of weak

marginal macrochete, and there are several, also discal, macrochete on the anal segment. Legs rufous,

the tarsi blackish ; hind tibie slightly curved; foot-claws and pulvilli of the male rather elongate, the

pulvilli yellow. Tegule yellow. Wings yellowish-grey; small cross-vein nearly under the end of the

first vein and a little beyond the middle of the discal cell; third and fourth veins divergent towards the

tip of the wing; terminal and penultimate sections of the fourth vein equal in length; posterior cross-

vein slightly undulate.

Hab. Mexico1, Sierra de las Aguas Escondidas in Guerrero 7000 to 9500 feet

(H. H. Smith), Northern Yucatan (Gaumer).

A single male from Yucatan, and six females from Guerrero are before me. The

description given by Giglio-Tos is perfectly applicable to the female specimens. As

the male agrees with them in its principal characters, I have no doubt that it belongs

here.

2. Mydea obscura, sp.n., ¢. (Tab. VIII. figg. 3; 3a, head in profile.)

Cinereous ; four stripes on the thorax and two dorsal spots on the abdomen blackish ; antennz, palpi, and legs

rufous.

Length 10°5 millim.

Head whitish-cinereous ; front very narrow, but separating the eyes; frontal band black, linear; face perpen-

dicular; vibrisse at the oral margin, which is not prominent; cheeks narrow; inferior part of the head

with several bristles. Antenne rufous, inserted beneath the median line of the eyes; second joint a

little projecting, with some bristles; third joint nearly three times as long as the second; arista thickened

at the base, with long and fine hairs. Proboscis brown; palpi cylindrical, dark rufous. Thorax and

scutellum cinereous; thoracic dorsum with four distinct blackish stripes, the external stripes interrupted

at the transverse suture; humeral cicatrix rufous; four dorso-central bristles behind the suture.

Abdomen broadly ovate, cinereous, with blackish dorsal spots on the second and third segments ; under-

side somewhat rufous at the base; anal segment with several irregular macrochete. Legs, including

the coxe, rufous, the tarsi dark brown or black; foot-claws and pulvilli elongate, the pulvilli yellow.

Tegule yellowish. Wings brownish-grey; small cross-vein before the end of the first vein and beyond

the middle of the discal cell; third and fourth veins distinctly divergent and slightly curved towards the

end; terminal and penultimate sections of the fourth vein nearly equal in length ; posterior cross-vein

oblique and curved.

Hab. Mexico, Northern Yucatan (Gaumer).

Four male specimens.

8. Mydza concinna, sp.n., 3 2.

Cinereous; four black stripes on the thorax; antenne, palpi, and legs rufous; basal segments of the abdomen

in the male yellow and transparent.

Length 6 millim.

Head grey, with white reflections ; eyes nearly cuntiguous in the male; front of the female as broad as the

318 DIPTERA.

eyes, the frontal band black and bifid towards the vertex; frontal bristles reaching to the root of the

antenne, the lowest pair of these distinctly longer than the others in the female; face perpendicular ;

vibrisse at the oral margin, which is not prominent and bears many shorter bristles. Eyes descending

nearly to the underside of the head. Antenne rufous, inserted above the median line of the eyes ; second

joint bristly ; third joint twice as long as the second, reaching to near the vibrissw, more or less infuscate

at the tip; arista long-plumose. Proboscis blackish; palpi rufous, cylindrical, slightly thicker towards

the end. Thorax cinereous, before the transverse suture whitish-grey, with four black stripes; two

dorso-central bristles before and four behind the suture; scutellum ferruginous, blackish at the base.

Abdomen of the male ovate; the first three segments yellow and transparent, with black margins—on

the first segment this margin is very narrow, on the second it is broader and triangularly enlarged in

the middle, and on the third it is still broader; anal segment cinereous, with indistinct black spots. In

the female the abdomen is more attenuated towards the end, the ground-colour is more cinereous, and

the black margins are less distinct. In both sexes there are macrochete at the hind margin of the third

segment and on the anal segment. Legs rufous, with black tarsi; foot-claws and pulvilli scarcely longer

in the male than in the female, the pulvilli whitish. Tegule yellowish. Wings greyish-hyaline; third

and fourth veins nearly parallel; small cross-vein under the end of the first vein and beyond the middle

of the discal cell; posterior cross-vein somewhat concave; the small cross-vein sometimes slightly

infuscate,

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

One male and three female specimens.

A second male, probably a variety, from the same locality, differs from the other in

having the basal half of the front femora, the median portion of the other femora, and

a spot at the tip of each of them, black.

4. Mydea fasciventris, sp. n., °.

Cinereous ; thorax with four stripes, the abdomen with a dorsal stripe and the hind borders of the segments,

blackish ; antenne and palpi rufous; legs piceous.

Length 7 millim.

Front as broad as the eyes, with parallel sides ; frontal band brown, as broad as the lateral portions, which

are grey; the lowest pair of the frontal bristles a little stronger than the others. Face and cheeks

whitish-cinereous; the face perpendicular; vibrisse inserted ata short distance above the oral margin;

lower part of the cheeks under the eyes narrow and with many short bristles. Antenne rufous, inserted

nearly on the median line of the eyes; second joint with a pair of bristles; third joint twice as long as

the second ; arista slightly thickened at the base, long-plumose. Proboscis black, with rufous terminal

lips; palpi rufous. Thorax cinereous, posteriorly with a rufous tinge; the four blackish stripes distinct,

interrupted at the transverse suture; scutellum cinereous, with rufous tip. Abdomen broader than the

thorax, cinereous ; first segment, hind borders of the second and third segments, and a dorsal stripe

blackish ; weak macrocheet at the hind border of the third segment and on the anal segment. Legs

piceous, the knees slightly rufous; foot-claws and pulvilli short. Tegule and wings greyish; small

cross-vein a little before the end of the first vein and beyond the middle of the discal cell; third and

fourth veins nearly parallel; terminal section of the fourth vein scarcely longer than the penultimate

section ; posterior cross-vein slightly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

5. Mydea leucocephala, sp. n., ¢.

Cinereous ; head whitish ; four thoracic stripes, reflecting spots on the abdomen, antenne, and palpi black ;

legs rufous, tarsi and front femora black.

Length 6 millim.

MYDAA.—SPILOGASTER. 319

Front nearly as broad as the eyes, with parallel sides; frontal band black, bifid towards the vertex; the

lateral portions of the front whitish; frontal bristles descending to the root of the antenne, the lowest

pair of these stronger than the others and cruciate. Face and cheeks whitish, the face perpendicular ;

vibrisse inserted at a short distance above the oral margin; inferior part of the cheeks narrow, with a

row of bristles. Antennee black, issuing a little above the median line of the eyes; second joint with

some bristles ; third joint two and one-half times as long as the second and reaching to near the vibrisse ;

arista with long hairs. Proboscis and palpi black, the palpi cylindrical. Thorax and scutellum cinereous ;

thorax with four black stripes, the two median stripes posteriorly enlarged and prolonged behind the

transverse suture, the external stripes less conspicuous and more in the form of spots ; scutellum with a

black discal spot. Abdomen scarcely broader than the thorax, obscure cinereous, with black reflecting

spots, which are so extended that the abdomen presents a black aspect ; macrochate present on the anal

segment and at the hind margin of the third segment. Legs rufous; front femora to near the tip, the

middle femora at the base, and all the tarsi black; foot-claws and pulvilli short. Tegule whitish.

Wings greyish-hyaline ; small cross-vein under the end of the first vein and a little beyond the middle of

the discal cell; third and fourth veins nearly parallel towards the end; terminal section of the fourth

vein a little longer than the penultimate section (23 : 2); posterior cross-vein slightly curved.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

6. Mydea confinis, sp.n., ¢.

Cinereous; head whitish; thorax with four black stripes; antenns and legs rufous, the tarsi and palpi black.

Length 6 millim.

Allied to the preceding (M. leucocephala), and agreeing with that species in most of its characters; but

differing from it in having the antenne rufous (except the basal joints, and the tip of the third joint,

which are somewhat brownish), the vibrisse inserted exactly at (not above) the oral margin, and the eyes

descending almost to the underside of the head, the femora also being entirely rufous. The wings have

the third and fourth veins somewhat more divergent; the terminal section of the fourth vein is longer

in proportion to the penultimate (3: 2); the posterior cross-vein is nearly straight.

Hab. Mexico, Orizaba (Ff. D. Godman).

A single female specimen.

SPILOGASTER,

Spilogaster, Macquart, Suites 4 Buffon, Dipt. i. p. 293 (1835).

The species of this genus agree in most of their characters with those of the

preceding (Mydea), but differ from them in the more elongate, sometimes conical,

shape of the abdomen (especially in the males), and in the distinct blackish spots on

it, usually two on each of the second and third segments.

The following species from Central America are represented in the collections before

me :—

1. Abdomen with triangular dorsal spots . . . . - . . . trigonata, v. d, Wulp.

Abdomen with four rounded spots on the second and third

segments . . . 2

2. Wings without blackish markings . . .

Wings with blackish markings on the cross-veins . . . . . 5.

320 DIPTERA.

3. Antenne and palpirufous . . . . . 1. ee ee « + rebripalpis, v. d. Wulp.

Antenne and palpi black . . . . a

A Legs black, with the tibiz testaceous c \, or rufous, with black

tarsi (9) (larger species). . . Loe . oe. ee ee) 6COpiosa, v. d. Wulp.

Legs almost wholly black in both sexes (smaller species) . . . parvula, v.d. Wulp.

5. Eyes of the male contiguous . . . ee ee ee) Signatipennis, v.d. Wulp.

Eyes of the male separated by a linear front 2 ee ee ee) 6disereta, v. d. Wulp.

1. Spilogaster trigonata, sp.n.,g. (Tab. VIII. figg. 4; 4a, head in profile. )

Thorax cinereous, with four blackish stripes; abdomen yellowish, with blackish triangular dorsal spots ;

antenne, palpi, and legs testaceous.

Length 10°5 millim.

Front grey, slightly separating the eyes; frontal band black, linear ; frontal bristles descending to the root of

the antennz, the lowest pair of these somewhat stronger than the others ; face and cheeks yellowish-grey,

the face perpendicular; vibrisse just at the oral margin; lower part of the cheeks under the eyes narrow,

with a row of bristles. Antenne testaceous, inserted on the median line of the eyes; second joint with

some bristles; third joint elongate, two and one-half times as long as the second, reaching to near the

vibriss ; arista thickened at the base, long-haired. Proboscis brown, thick ; palpi testaceous, cylindrical.

Thorax and scutellum greyish-cinereous; thoracic dorsum with four blackish stripes, the lateral stripes

interrupted at the transverse suture. Abdomen elongate, conical, yellowish, with a blackish dorsal band,

formed by a row of triangular spots on the first three segments, the spot on the third segment being the

largest ; third segment with a row of marginal macrochetzee and the anal segment with many irregularly

arranged macrochete. Legs slender, testaceous, the tarsi brown; foot-claws and pulvilli elongate, the

pulvilli yellowish. Tegule whitish. Wings greyish-hyaline ; small cross-vein under the end of the first

vein and distinctly beyond the middle of the discal cell; third and fourth veins nearly parallel; terminal

section of the fourth vein nearly double as long as the penultimate section ; posterior cross-vein oblique,

slightly curved.

Hab. Nicaracva, Chontales (Janson).

A single male specimen.

2. Spilogaster rubripalpis, sp. n., 2.

Cinereous ; thorax with indistinct brown stripes; abdomen with four blackish spots; hind border of the

scutellum, antenne, palpi, and legs rufous.

Length 5-6 millim.

Head whitish-cinereous; front as broad as the eyes; frontal band blackish, much broader than the lateral

portions ; face perpendicular; vibrisse at the oral margin ; lower part of the checks narrow, with a row

of bristles. Antennz rufous, inserted on the median line of the eyes; second joint with a bristle; third

joint slender, twice as long as the second, brownish towards the tip; arista black, long-plumose. Pro-

boscis black ; palpi rufous, filiform. Thorax, scutellum, and abdomen cinereous; thoracic dorsum with

four indistinct brown stripes; hind border of the scutellum slightly rufous ; abdomen pointed towards

the apex, with four rounded blackish spots—two on the second and two on the third segment; at the

hind margin of the third segment and on the anal segment are a few erect macrochete. Legs rufous,

the tarsi black ; foot-claws and pulvilli short. Tegule whitish. Wings greyish-hyaline, with a short

costal spine ; small cross-vein under the end of the first vein and distinctly beyond the middle of the

discal cell ; third and fourth veins divergent towards the end; terminal section of the fourth vein longer

than the penultimate section (3: 2); posterior cross-vein concave.

Hab. Mexico, Dos Arroyos, Tepetlapa, and Sierra de las Aguas Escondidas, all in

Guerrero, Cuernavaca in Morelos (H. H. Smith) ; Costa Rica, Caché (Rogers).

SPILOGASTER. 321

Several female specimens. One of them has a somewhat rufous abdomen and the

dark spots on it less regular. As it agrees in other respects, it is probably a variety.

3. Spilogaster copiosa, sp.n. ¢ 2. (Tab. VIII. figg. 5, ¢ ; 5a, head in

profile, 3.)

Cinereous ; antenna, palpi, four thoracic stripes, and four (or six) spots on the abdomen, black ; legs blackish,

with testaceous tibie (¢), or rufous, with black tarsi (9 ).

Length 7:5 millim.

Front in the male very narrow, but separating the eyes, with the frontal band black, linear; front in the

female cinereous, broader than the eyes, with the frontal band black, divided into two stripes, which are

convergent towards the antenne ; face and cheeks grey, with some white reflections, the face slightly

concave; lower part of the cheeks nearly equalling one-third of the longitudinal diameter of the eyes ;

vibrisse at the oral margin; underside of the head with many bristles. Antenne black, inserted on the

median line of the eyes; second joint bristly ; third joint two and one-half times as long as the second,

reaching to near the vibrisse; arista moderately long-plumose. Proboscis and palpi black, the palpi

cylindrical. Thorax, scutellum, and abdomen cinereous; thoracic dorsum with four black stripes,

which are interrupted at the transverse suture; two dorso-central bristles before and three behind the

suture ; scutellum somewhat trigonal. Abdomen of the male conical, truncated at the end, with three

pairs of rounded brown or blackish spots—on the first, second, and third segments, those of the first

segment smaller and often less distinct. Abdomen of the female more convex, pointed towards the tip,

with four similar spots, those of the first segment being usually absent. Abdomen in both sexes with

macrochtz on the anal segment and in a marginal row on the third segment; in the male the macro-

chetee are mixed with bristly hairs. Legs slender, with the tarsi longer than the tibia; in the male

they are black, with the knees and tibie testaceous ; in the female the femora and tibia are rufous, the

upperside of the front femora (sometimes also that of the other femora) and the tarsi being black ; foot-

claws and pulvilli elongate in the male, the pulvilli yellowish. Tegule whitish. Wings brownish-

hyaline, in the female often with a costal spine; small cross-vein under the end of the first vein and

distinctly beyond the middle of the discal cell; third and fourth veins nearly parallel; terminal section

of the fourth vein in the male more than double as long as the penultimate section, in the female much

shorter (3:2); posterior cross-vein slightly undulate.

Hab. Mexico, Xucumanatlan, Omilteme, and Sierra de las Aguas Escondidas, all in

Guerrero, 7000 to 9500 feet (A. H. Smith).

Many specimens of both. sexes.

4, Spilogaster parvula, sp.n., 3 9.

Cinereous ; stripes on the thorax, four spots on the abdomen, antenne, palpi, and legs, black.

Length 4°5-5°5 millim.

Closely allied to the preceding (S. copiosa), but much smaller in size. The external stripes on the thorax

often less conspicuous ; the spots on the first abdominal segment always wanting; the legs black in both

sexes, with the knees and tibie only sometimes slightly testaceous; the wings clearer, without any

brownish tinge; the posterior cross-vein straight and more perpendicular, especially in the female; a

costal spine is mostly present.

Hab. Mexico, Tepetlapa, Amula, and Omilteme, all in Guerrero, 3000 to 8000 feet

(H. H. Smith).

Several specimens.

BIOL. CENTR.-AMER., Dipt., Vol. II., December 1896. 2t

322 DIPTERA.

5. Spilogaster signatipennis, sp.n., ¢ ¢. (Tab. VIII. figg.6, ¢; 6a, head

in profile, 3 .)

Cinereous ; antenne, four thoracic stripes, and four spots on the abdomen, black ; legs black, with yellowish tibie

(3), or rufous, with black tarsi ( 2); cross-veins of the wings bordered with black; eyes contiguous (d ).

Length 6 millim.

Front in the male triangular, the eyes subcontiguous ; in the female the front as broad as the eyes, cinereous,

with the frontal band black, divided into two stripes. Face and cheeks whitish-grey, the face short ;

vibrissx at the oral margin, which is slightly prominent; lower part of the cheeks equalling one-third ( ¢)

or one-fourth ( ) of the longitudinal diameter of the eyes; a row of bristles on the underside of the head.

Antennz black, inserted nearly on the median line of the eyes ; second joint with a pair of small bristles ;

third joint more than twice as long as the second ; arista moderately plumose. Proboscis and palpi

black, the palpi sometimes clearer. Thorax and scutellum cinereous; thoracic dorsum with four black

stripes, which are most conspicuous before the transverse suture; two dorso-central bristles before and

three behind the suture ; mctanotum grey. Abdomen cinereous, conical ( 2) or elongate-oval (2); base

of the first segment, two large spots on the second and two others on the third segment, brownish-

black ; a brown interrupted dorsal line is more or less distinct ; macrochete present at the hind margin

of the third segment and on the anal segment, but in the male less conspicuous among the bristly hairs

of the abdomen. Legs slender, in the male black, with the tibie yellowish-testaceous ; in the female the

femora towards the tip and the tibie are rufous; front femora with a row of bristles on the upper and

under sides; foot-claws and pulvilli elongate in the male, the pulvilli yellowish. Tegule yellowish-grey

(&), more whitish (2). Wings brownish-byaline, with a small costal spine; small and posterior cross-

veins bordered with black; small cross-vein nearly under the end of the first vein and a little beyond the

middle of the discal cell; third and fourth veins parallel towards the end; terminal section of the fourth

vein nearly twice as long as the penultimate section ; posterior cross-vein somewhat angularly concave.

Hab. Mexico, Chilpancingo, Xucumanatlan, Omilteme, and Sierra de las Aguas

Escondidas, all in Guerrero, 4600 to 9500 feet (1. H. Smith), Orizaba (H. 1. Smith

and F. D. Godman).

Several specimens of both sexes.

6. Spilogaster discreta, sp. n., ¢ (? 2).

Cinereous; four thoracic stripes, four spots on the abdomen, antenne, palpi, and legs, black, the knees and

tibie testaceous; cross-veins bordered wita black; eyes ( ¢) separated by a linear front.

Length 5-6 millim.

Very like the preceding (S. signatipennis), but differing in the male sex in having a narrow white front

distinctly separating the eyes and showing a linear black frontal band; the tegule are whitish and the

posterior cross-vein is not concave, but nearly straight. ©

Hab. Mexico, Amula 6000 feet and Xucumanatlan 7000 feet, both in Guerrero

(H. H. Smith).

A single male from each locality.

Two female specimens from Amula agree with the corresponding sex of S. signati-

pennis, but have the posterior cross-vein more in a straight line; they may therefore

be considered as belonging to S. discreta.

HYDROTAA.

Hydrotea, Robineau-Desvoidy, Essai sur les Myodaires, p. 509 (1830).

The males of this genus may be easily recognized by the form of the front legs,

HYDROTAZA.—OPHYRA. 323

which have the femora near the tip and the tibie at their base denticulate or excavate.

The eyes are bare*, contiguous or subcontiguous in the male, broadly separated by

the front in the female; the antenne are shorter than the face; the arista is bare or

pubescent; the abdomen is ovate, without true macrochete, though hairy in the male ;

the tegule are unequal, the lower scale extending beyond the upper.

In the Central-American collections before me I have detected specimens of a single

species, agreeing with one of the commonest European forms.

1. Hydrotza dentipes.

Musca dentipes, Fabr. Syst. Antl. p. 803 '.

Anthomyia dentipes, Meigen, Syst. Beschr. v. p. 144°.

Aricia dentipes, Zett. Dipt. Scand. iv. p. 1426°.

Hydrotea dentipes, Schin. Faun. Austr., Dipt. 1. p. 615*; Meade, Ent. Monthly Mag. xiv. p. 251° ;

Osten Sacken, Cat. Dipt. N. Am. p. 166°.

Hab. Norta America °.—Mexico, Xucumanatlan in Guerrero (H. H. Smith); Costa

Rica, Volcan de Irazu 6000 feet (Rogers).—Eurore 1,

OPHYRA.

Ophyra, Robineau-Desvoidy, Essai sur les Myodaires, p. 516 (1830).

This genus agrees in many respects with the preceding (Hydrotea), but differs from

it in having the front femora simple ; the abdomen is metallic in some of the species.

In the Central-American collection before me two species are represented.

1. Ophyra argentina.

Ophyra argentina, Bigot, Ann. Soc. Ent. Fr. 1885, p. 302"; Gigl.-Tos, Mem. R. Accad. Scienze di

Torino, ser. 2, xlv. (sep.) p. 26’.

Hab. Mexico, Mexico city (H. H. Smith), Orizaba and 'Tehuacan *.—SoutuH America,

Buenos Ayres},

A single female specimen from Mexico city, perfectly agreeing with Bigot’s short

description.

2. Ophyra ——?

Hab. Mexico, Omilteme in Guerrero (H. H. Smith).

A single female specimen, unicolorous shining black, with the costa of the wings,

except at the base, blackish-brown.

* The species of Hydrotcea which have the eyes pilose are separated by Rondani under'the gencric name

Onodontha. :

324 DIPTERA.

BRACHYOPHYRA.

Brachiophyra, Giglio-Tos, Boll. Mus. Zool. Anat. Comp. di Torino, viii. no. 147, p. 9 (1893).

According to the author, this genus is allied to Ophyra, Rob.-Desv., and Brachy-

tarsina, Macq. It is mentioned here because it is founded on a Mexican species,

which, however, is unknown to me.

1. Brachyophyra effrons.

Brachiophyra effrons, Gigl.-Tos, Boll. Mus. Zool. Anat. Comp. di Torino, vii. n. 147, p. 9 ,

Hab. Mexico}.

LIMNOPHORA.

Limnophora, Robineau-Desvoidy, Essai sur les Myodaires, p. 517 (1830).

The Anthomyine of this genus are generally of a smaller size than those of Ophyra,

and mostly of a cinereous coloration, with black markings on the abdomen. ‘The eyes

are bare, nearly or quite contiguous in the males, broadly separated in the females; the

vibrissee are inserted at the oral margin; the arista is bare or pubescent; the abdomen

is ovate or elliptical, with four visible segments only; the legs are simple in both sexes ;

and the lower scale of the tegule extends beyond the upper one. The wings have the

third and fourth veins parallel, the fourth not being curved upwards towards the end ;

the anal vein does not reach the border of the wing.

From the Central-American regions I examined representatives of the following

species :—

1. Wings without blackish markings. 2. 1 1 1 ee ee ee

Wings with a blackish marking at the cross-veins. . . - . - + 4&

2. Wings brownish ; foot-claws and pulvilli elongate in the male . . fumipennis, v. d. Wulp.

Wings greyish-hyaline ; foot-claws and pulvilli short . . . . . 3.

8. Terminal section of the fifth vein nearly as long as the posterior

eross-veln. 2. 6 ee ee ee ew meraca, v. d. Wulp.

Terminal section of the fifth vein distinctly shorter than the posterior

cross-veln. . . oe Loew ew ww ew ee) 6Aelecta, v. d. Wulp.

4, Wings, in addition to the brown-bordered cross-veins, with a brown

marking along the costa and at the tip of the third and fourth

veins; palpi and legs black . . . . 1. ee + ee + + + umbrosa, Vv. d. Wulp.

Only the cross-veins brown-bordered ; palpi and legs rufous . . . socia, v. d. Wulp.

1. Limnophora faumipennis, sp.n.,¢. (Tab. VIII. fig. 7.)

Black ; abdomen cinereous, with four black spots; wings brownish.

Length 5°5 millim.

Front triangular, black; eyes contiguous ; face and cheeks black, the internal orbits narrowly whitish, the face

perpendicular ; oral margin slightly prominent; inferior part of the cheeks narrow, with a row of bristly

hairs. Antenne black, inserted on the median line of the eyes; second joint with a bristle; third joint

two and one-half times as long as the second, reaching to near the vibrissx ; arista pubescent. Proboscis

and palpi black, the palpi cylindrical. Thorax, scutellum, and abdomen black, slightly shining ; thorax

LIMNOPHORA. 325

anteriorly somewhat cinereous, with traces of black stripes; abdomen elliptical, with some cinereous

tomentum and four black spots—two on the second and two on the third segment; long macrochete

and bristly hairs at the hind margin of the third segment and on the anal segment. Legs slender, black,

the extreme tip of the front femora rufous, the hind tibie piceous; front femora with a row of bristles

on the upper and under sides; foot-claws and pulvilli elongate, the pulvilli yellowish. Tegulee and

halteres yellowish. Wings brownish, darker along the costa; a very minute hyaline spot at the base of

the mediastinal cell; small cross-vein under the end of the first vein and beyond the middle of the discal

cell; terminal section of the fourth vein longer than the penultimate section (3:2); posterior cross-vein

oblique and nearly straight.

flab. Mexico, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith).

A single male specimen.

_ 2. Limnophora meraca, sp. n., 3.

Cinereous; head white; eyes separated by a narrow front; antenne, palpi, four spots on the abdomen, and

legs, black.

Length 5 millim.

Front in the middle narrow, slightly separating the eyes, triangularly enlarged above the antenne; frontal

band black; the internal orbits white; face and cheeks white, with blackish reflections; oral margin

retracted ; inferior part of the cheeks very narrow, with the usual row of bristles. Antenne black (in

the unique specimen somewhat compressed in the antennal grooves); arista pubescent. Proboscis and

palpi black; the palpi cylindrical, with short bristly hairs. Thorax, scutellum, and abdomen cinereous ;

thorax with indistinct brown stripes; abdomen elliptical, with four brownish-black spots—two on the

second and two on the third segment, and with many bristly hairs arising from black points. Legs

black ; front femora with a row of rather long bristles on the underside; foot-claws and pulvilli scarcely

elongate, the pulvilli yellowish. Tegule whitish; halteres yellow. Wings greyish-hyaline; small cross-

vein under the end of the first vein and a little beyond the middle of the discal cell; third and fourth

veins parallel; terminal section of the fourth vein twice as long as the penultimate section; posterior

cross-vein oblique and straight, nearly equalling in length the terminal section of the fifth vein.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single male specimen.

8. Limnophora delecta, sp. n., ¢ 9.

Cinereous; head white; eyes contiguous (¢); four spots on the abdomen, antenne, palpi, and legs, black ;

fourth vein slightly curved upwards at the tip.

Length 5 millim.

Very nearly allied to LZ. meraca, but differing from it in having the eyes quite contiguous in the male, and the

spots on the abdomen more quadrangular, with a slight projection anteriorly on the inner side. The knees

are rufous. The third and fourth veins are not exactly parallel, the latter being a little curved upwards

at the end; the posterior cross-vein has a more perpendicular position and comes inferiorly nearer to the

border of the wing, thus making the terminal section of the fifth vein much shorter than the cross-

vein. The antenne are inserted on the median line of the eyes; the third joint is double as long as the

second. In the female the front is as broad as the eyes and has parallel sides, the frontal band is repre-

sented by two black stripes, which are convergent towards the antenne, the blackish stripes on the

thorax are more conspicuous, and the abdomen is ovate, pointed at the tip, with the four spots on the

median segments less distinct; the neuration of the wings agrees with that of the male, the curvature at

the end of the fourth vein is, however, scarcely perceptible.

Hab. Mexico, Amula 6000 feet and Rincon 2800 feet, both in Guerrero

(H. H. Smith).

A male specimen from Amula, and a female from Rincon.

326 DIPTERA.

4. Limnophora umbrosa, sp. n., 2.

Black; legs piceous; wings with brown markings at the costa, the end of the third and fourth veins, and on

the cross-veins.

Length 45-5 millim.

Front slightly prominent, as broad as the eyes, cinereous; frontal band black, divided into two stripes; face

and cheeks whitish-grey, the face somewhat concave; inferior part of the cheeks equalling one-fourth of

the longitudinal diameter of the eyes. Antenne black, inserted distinctly above the median line of the

eyes; second joint bristly; third joint more than three times as long as the second, reaching to near the

vibrissee. Proboscis and palpi black. Thorax, scutellum, and abdomen black; thorax before the trans-

verse suture with cinereous tomentum and four black stripes; metanotum grey; abdomerf convex, ovate,

pointed towards the tip, with scarcely perceptible greyish markings and with some erect macrochete at

the sides, on the hind margin of the third segment, and on the anal segment. Legs piceous. Tegule

greyish ; halteres yellowish-rufous. Wings with a short costal spine, brownish; the costa, except at the

base, but including the mediastinal cell, a rounded spot on the small cross-vein, and a broad border on

either side of the posterior cross-vein, dark brown; the tips of the third and fourth veins clouded with

brown; small cross-vein under the end of the first vein and a little beyond the middle of the discal cell ;

third and fourth veins parallel; terminal section of the fourth vein longer than the penultimate section

(3:2); posterior cross-vein straight, much longer than the last section of the fifth vein.

Hab. Costa Rica, Rio Sucio and Volcan de Irazu (Rogers).

Two female specimens.

5. Limnophora socia, sp. n., 2.

Cinereous ; four stripes on the thorax and four spots on the abdomen blackish; basal joints of the antenne,

palpi, and legs rufous ; cross-veins bordered with brown.

Length 4:5 millim. ,

Front cinereous, as broad as the eyes; frontal band black, divided into two stripes; face, cheeks, and occiput

greyish; inferior part of the cheeks narrow. Antenne inserted above the median line of the eyes; the

basal two joints, and also the base of the third, rufous, this joint for the rest brown. Proboscis brown ;

palpi yellowish-rufous. Thorax, scutellum, and abdomen cinereous; thorax with four brown stripes ;

metanotum grey. Abdomen ovate, pointed towards the tip; two large, quadrangular brown spots on the

second and two others on the third segment; discal and marginal macrochete on the third and anal

segments. Legs rufous, witn black tarsi (in one of the specimens the femora are black to near the tip);

foot-claws and pulvilli short. Tegule whitish; halteres yellow. Wings brownish-hyaline; the costa

fringed with short bristles to as far as the mediastinal vein, where there is a costal spine; small cross-vein

and posterior cross-veins bordered with brown; small cross-vein under the end of the first vein and nearly

on the middle of the discal cell; third and fourth veins parallel and very slightly arcuate; terminal

section of the fourth vein longer than the penultimate section (3:2); posterior cross-vein straight.

Hab. Mexico, Omilteme 8000 feet and Sierra de las Aguas Escondidas 9500 feet,

both in Guerrero (H. H. Smith).

Five female specimens.

LEUCOMELINA.

Leucomelina, Macquart, Dipt. Exot., Suppl. 4, p. 261 (1850).

This genus was founded by Macquart on a Brazilian species, L. pica. Its characters

are, as usual with this author, very briefly indicated, and among them the arista is

mentioned as bare: in his figure also (J. c. t. 24. figg. 3a and 36) the arista is repre-

sented without any pubescence. Macquart, though he described the male sex only,

LEUCOMELINA. 327

says nothing about the front; but his figure 3 proves that the genus belongs amongst

those in which the males have a narrow front. Nevertheless, Bigot, in his synoptic

table of the genera of Anthomyine (Ann. Soc. Ent. de France, 1883, p. 19), placed

Leucomelina, Macq., at the end of his first division (with unequal tegule), among the

genera with the front (¢) broader than half the diameter of the eyes (no. 34 of the

synoptic table). ‘This, however, seems to be a mere mistake, as he subsequently

compared (Ann. Soc. Ent. de France, 1885, pp. 263, 264) Leucomelina pica, Macq.,

with Limnophora elegans, Macq., and stated that, in opposition to Macquart’s assertion,

the species has the arista pubescent (‘‘ tomenteux ”).

The genus Leucomelina is nearly related to Limnophora. Like this latter, it has the

eyes bare, contiguous or subcontiguous in the male; the abdomen conical or elliptical,

and with symmetric markings; the tegule unequal; and the anal vein not reaching

the border of the wing. It differs from it, however, in having the fourth vein distinctly

curved upwards near the end, Leucomelina in this respect showing a certain affinity

with some genera of the group Muscine.

The species of Lewcomelina are closely allied. All have the head whitish, and the

antennee, proboscis, palpi, and legs black; the legs are slender. In the males the

thorax is deep black, with conspicuous white markings; and the foot-claws and pulvilli

are elongate. In the females the thorax is more cinereous and the white markings

less sharp. .

In the Central-American collections before me the genus Leucomelina is abundantly

represented. I have made an attempt to distinguish the following species :—

1. Eyes (gf) contiguous . 1 1 ee we ee ee ee ee

Eyes (3) separated by a linear front. . . . . . =. . 5.

2. Anal segment cinereous, unicolorous, or with a single indistinct

brown spot. . . . . 3.

Anal segment with two distinct black spots, which are separated by

aclear dorsal stripe. . 2. 2. 1 1 ee ee ee ee ee Me

3. Prothorax unicolorous black. . . . . . +. + © + «© « ~ pica, Macq.

Prothorax with two white stripes . . . . 2... . . . . « corvina, Gigl.-Tos.

4. Transverse suture of the thorax with a white margin, interrupted in

the middle. . . . 1. «© © we ew ee we we ew we «8A, Wiedem.

Transverse suture of the thorax without white margin . . . . . deleta,v.d. Wulp.

5. Posterior cross-vein oblique; terminal section of the fourth vein

distinctly curved upwards (larger species). . . . . . + « . garrula, Gigl.-Tos.

Posterior cross-vein nearly perpendicular; terminal section of the

fourth vein very slightly curved upwards (smaller species) . . . minuscula, v.d. Wulp.

In the above synoptic table the characters are exclusively derived from the male sex ;

it has, however, no claim to represent the true natural relations, as some of the so-called

species may be no more than varieties. As to the females I am still less certain.

328 DIPTERA.

After the most careful examination of the numerous female specimens before me,

I am able to assign only a few of them to their respective males, sometimes on

a mere conjecture; the majority of them must therefore remain undetermined for

the present.

1. Leucomelina pica. (Tab. VIII. figg. 8, ¢; 8a, head in profile, ¢ .)

Leucomelina pica, Macq. Dipt. Exot., Suppl. 4, p. 262, t. 24. fig. 3°; Gigl-Tos, Mem. R. Accad.

Scienze di Torino, ser. 2, xlv. (sep.) p. 18°.

Eyes contiguous (¢); thorax black, with a white lateral band; anal segment cinereous, without distinct spot.

Length 4:5-5 millim. . .

Front triangular, black; the eyes contiguous; face and cheeks black, with white reflections ; the face shorter

than the front, concave, slightly projecting ut the oral margin; inferior part of the cheeks linear, with a

row of bristles. Antenne, proboscis, and palpi black; the antenne inserted on the median line of the

eyes, the second joint with a minute bristle, the third joint two and one-half times as long as the second ;

arista slightly pubescent. ‘Thorax deep black; a broad band on each side, extending from the shoulder

to the root of the wings, and’some spots on the pleure, above the coxee, white; in the hind angles before

the scutellum are two large whitish reflecting spots; scutellum trigonal, black, with a cinereous hind

border; metanotum grey. Abdomen conical, truncated at the apex, cinereous; first segment, except at

the sides, with a narrow hind margin and the beginning of a dorsal line, black ; second segment with two

large black spots, which do not quite reach the hind border, and are placed so close together that there

remains only a narrow dorsal stripe of the ground-colour between them (these spots usually appearing

trigonal, but sometimes they are more quadrangular in shape); third segment with two similar spots,

which are usually a little smaller than those on the second segment, and sometimes assume the form of a

short transverse band immediately before the hind margin of the segment, this being extended on the

inner side in a longitudinal projection, along which the dorsal stripe of the preceding segment is prolonged ;

anal segment unicolorous cinereous, more or less infuscate in the middle; many macrochete and bristly

hairs are present on the sides and towards the end of the abdomen. Legs black, slender; front femora

with a row of regular bristles on the upper and under sides; foot-claws and pulvilli elongate, the pulvilli

white. Tegule yellowish-grey; halteres yellow. Wings brownish-hyaline; small cross-vein under the

end of the first vein and beyond the middle of the discal cell; terminal section of the fourth vein distinctly

curved upwards in the middle; posterior cross-vein oblique and nearly straight.

Hab. Mexico 2, Orizaba (H. H. Smith and F. D. Godman), Xucumanatlan 7000 feet

and Omilteme 8000 feet, both in Guerrero (H. H. Smith).—Braziu'.

Four male specimens. |

2. Leucomelina corvina.

Leucomelina corvina, GiglTos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 19°.

Eyes contiguous (¢); thorax black, with a lateral band, and two stripes before the transverse suture, white ;

anal segment with a brown dorsal stripe.

Long. 4-5 millim.

Differs from the preceding (L. pica) in the greater extension of the white markings on the thorax ; the lateral

band is broader; the transverse suture has a white margin, which is interrupted in the middle, and on

the prothorax are two white longitudinal stripes, joining the interrupted end of the white margin at the

suture; the whitish spots at the posterior angles of the thorax are larger; the scutellum is cinereous, and

black at the base only. The abdomen agrees in coloration and markings with that of L. pica, except that

the black spots are often smaller and the dorsal stripe broader; the anal segment has in the middle a

distinct brown or blackish stripe. The wings are clearer; the curvature of the terminal section of the

LEUCOMELINA., 329

fourth vein is a little beyond the middle and sometimes less evident. The arista is more distinctly

short-haired.

Hab. Mexico !, Presidio (Forrer), Patzcuaro (/. D. Godman), Orizaba (H. H. Smith

and F. D. Godman), Mexico city, Tepetlapa, Chilpancingo, and Xucumanatlan in

Guerrero, Atoyac and Medellin in Vera Cruz, Cuernavaca in Morelos, Frontera and

Teapa in Tabasco (H. H. Smith).

A large series of male specimens.

3. Leucomelina seva.

Anthomyia seva, Wiedem. Aussereur. zweifl. Ins. ii. p. 430°.

Spilogaster seva, Schiner, Reise der Novara, Dipt. p. 300’.

Limnophora elegans, Macq. Dipt. Exot. ii. 3, p. 165, t. 22. fig. 6°.

Eyes contiguous (¢); thorax black, with a lateral band and a margin to the transverse suture white; anal

segment with two blackish stripes.

Length 4°5—6 millim.

In the contiguous eyes (¢) this species agrees with both the preceding, and in the white-margined trans-

verse suture with Z. corvina. On the prothorax, however, the longitudinal white stripes are absent,

though some traces of them are recognizable in a small projection at the interrupted end of the sutural

stripe. ‘The abdomen resembles that of the preceding species in shape, coloration, markings, and pilosity ;

on the anal segment, however, there are two blackish spots, similar to those on the other segments, but

somewhat smaller and more in the form of a pair of stripes, between which the dorsal line is prolonged.

The arista is short-plumose at its slightly enlarged base, and for the rest a little pubescent. The wings

are brownish, especially in the mediastinal cell and along the outer portion of the costa; the neuration is

exactly like that of L. pica.

Hab. Mexico, Omilteme in Guerrero, Teapa in Tabasco (H. H. Smith).—Soutu

Amenrica2, Guiana ?, Brazil 1.

Three male specimens.

Wiedemann’s description of Anthomyia seva, as amended by Schiner, who has

examined the typical specimens, perfectly agrees with the Mexican specimens before

me. Macquart’s description and figure of Limnophora elegans seem also to be fully

applicable to this species.

Two females from Caché and Rio Sucio, Costa Rica (Hogers), probably belong here,

as they show the two blackish stripes on the anal segment, and are without white

longitudinal stripes on the disc of the prothorax.

4, Leucomelina deleta, sp. n., ¢.

Eyes contiguous (¢); thorax black, with a white lateral band; no white margin to the transverse suture, nor

white stripes on the prothorax; anal segment with two black stripes.

Length 5°5 millim.

Differs from the preceding species (Z. seva) in the less extended white markings on the thorax; the lateral

bands are narrower; the white margin at the transverse suture is absent ; and the whole thoracic dorsum

is black, except for two whitish spots at the posterior angles. The abdomen has the black markings more

extended, and it could be described as black, with cinereous, triangular, lateral spots and a cineréous

BIOL. CENTR.-AMER., Dipt., Vol. II., December 1896. 2 u

330 . DIPTERA.

dorsal line. The arista is slightly pubescent. The wings are brownish-hyaline; the posterior cross-vein

is slightly sinuate.

Hab. Mexico, Xucumanatlan 7000 feet, Omilteme 8000 feet, and Sierra de las Aguas /

Escondidas 9500 feet, all in Guerrero (H. H. Smith).

Seven male specimens.

5. Leucomelina garrula. (Tab. VIII. fig. 9, 3.)

Leucomelina garrula, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 18’.

Eyes separated by a linear front (3); thorax black, with two stripes on the prothorax and two lateral bands

white; anal segment cinereous ; wings brownish ; posterior cross-vein oblique.

Length 7 millim.

This and the following species (Z. minuscula) differ (in the male sex) from all the preceding in having the eyes

not quite contiguous, but separated by a narrow black front. L. garrula bears a striking resemblance to

L. pica, and may be distinguished from it, apart from the above-mentioned difference in the form of the eyes,

by the presence of two white stripes on the prothorax. The wings are brownish, darker along the costa.

Hab. Mexico}, Sierra de las Aguas Escondidas 7000 feet and Omilteme 8000 feet,

both in Guerrero (H. H. Smith).

Seven male specimens.

Some females from the same localities and one from Cuernavaca in Morelos

(H. H. Smith) seem to belong to this species, as they agree with it in the large size,

the brownish wings, and the cinereous anal segment; the thoracic dorsum in these

females is cinereous, with three broad, somewhat irregular, black stripes.

6. Leucomelina minuscula, sp. n., ¢ ¢.

Eyes separated by a linear front (3); thorax black, with two stripes on the prothorax and two lateral bands

white ; anal segment cinereous; wings hyaline; posterior cross-vein nearly perpendicular.

Length 3°5 millim,

Of much smaller size than any of the other species of this genus, for the rest agreeing in most respects with

L. garrula, The head is more pure white, and the narrow front (¢) is bordered by linear white orbits ;

the black spots on the second and third abdominal segments are less extended and more perfectly

triangular; the wings are not infuscate; the position of the posterior cross-vein is more perpendicular ;

and the curvature of the fourth vein is less marked. The female specimens which I consider to belong

here conform with the males in their small size, hyaline wings, and neuration; the thorax may be

described as whitish, with five black bands, three dorsal and one on either side of the pleura.

Hab. Mexico, Atoyac in Vera Cruz and Xucumanatlan in Guerrero (1. H. Smith).

‘two male and seven female specimens. The females much resemble the same sex of

Limnophora delecta (anted, p. 325), but may be distinguished from them by the white

markings on the thorax.

TRICHOPHTHICUS.

Trichophthicus, Rondani, Dipt. Ital. Prodr. iv. p. 9 (1861), and vi. p. 145.

The characters of this genus are :—Eyes distinctly pilose, in the male contiguous ;

antenne short, the third joint nearly equal to the second in length; arista bare or

TRICHOPHTHICUS.—HOMALOMYIA. 331

slightly pubescent ; abdomen elongate, the first segment longer than the following ;

tegule unequal; anal vein not reaching the border of the wing.

1. Trichophthicus crenatus. (Tab. VIII. figg. 10, ¢ ; 10a, head in profile, ¢ .)

._Trichophthicus crenatus, Bigot, Ann. Soc. Ent. Fr. 1885, p. 282°.

? Lasiops mexicana, Gigl.-Tos, Boll. Mus. Comp. Anat. di Torino, viii. no. 147, p. 107; Mem.

R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 28°.

Hab. Mexico 123, Amula 6000 feet and Omilteme 8000 feet, both in Guerrero, Mexico

city (Hl. H. Smith).

Nine specimens—eight males and one female.

To Bigot’s description, which is taken from the male only, may be added :—In well-

preserved specimens the grey markings on the thorax are always conspicuous; they

consist of a trigonal spot on each of the posterior angles, and a lateral spot, which is

posteriorly prolonged in a line reaching the root of the wings. The metanotum is grey.

The abdomen is elliptical, long-haired ; the first segment is black; the other segments

are grey, with a handsome black marking, as indicated by Bigot. The underside of the

wings is very iridescent; the small cross-vein is distinctly beyond the middle of the

discal cell; the terminal section of the fourth vein is twice as long as the penultimate

section ; the posterior cross-vein is straight. The length of the males is 4 millim.

(Bigot gives 4°5 millim.).

The female specimen before me is in less perfect condition: it is a little smaller

(3°5 millim.); the pilosity of the eyes is inconspicuous; the thorax is cinereous, with

indistinct black stripes; the black marking on the abdomen is similar to that of the

male, but not so well defined, more in the form of detached spots; the wings are

clearer; the posterior cross-vein is more perpendicular.

HOMALOMYIA.

Homalomyia, Bouché, Naturgesch. der Insecten, i. p. 88 (1834).

In this well-defined genus the eyes are naked, contiguous or closely approximated in

the males; the arista is bare; the abdomen is more or less depressed, in the male

elliptical, with the first segment elongate and apparently divided into two; and the

under scale of the tegula extends beyond the upper. The wings have the anal (sixth)

vein abbreviated and the axillary (seventh) vein roundly curved towards the anal vein.

1. Homalomyia canicularis.

-Musca canicularis, Linn. Faun. Suec. p. 454 (1761)*; Fabr. Syst. Antl. p. 3037.

Anthomyia canicularis, Meig. Syst. Beschr. v. p. 143°.

Aricia canicularis, Zett. Dipt. Scand. iv. p. 1573 *.

Homalomyia canicularis, Schiner, Faun. Austr., Dipt. i. p. 654°; Reise der Novara, Dipt. p. 298°;

Bigot, Ann. Soc. Ent. Fr. 1885, p. 284".

2u2

332 DIPTERA.

Hab. Costa Rica, Rio Sucio (Rogers).—Souru America, Argentina ’—Maperra ° ;

S. Paut 1.6; Nicopar Is.6¢; Europe !~°.

A single male specimen from Costa Rica, perfectly agreeing with our common

European specimens.

2. Homalomyia mexicana.

Homalomyia mexicana, Bigot, Ann. Soc. Ent. Fr. 1885, p. 285 1; Gigl.-Tos, Mem. R. Accad.

Scienze di Torino, ser. 2, xlv. (sep.) p. 27°.

Hab. Mzxico12, Amula in Guerrero 6000 feet (H. H. Smith); Costa Rica, Caché

(Rogers).

Two male specimens. |

They agree perfectly with Bigot’s description, except that the rufous colour of the

knees and tibie is less conspicuous. This species is closely allied to H. canicularis,

but may easily be distinguished from it by the narrower front (the eyes being nearly

contiguous) and by the neuration of the wings. In H. mexicana the penultimate

section of the fourth vein is much shorter than the terminal section (2:5), and also

shorter than the posterior cross-vein; this latter is straight.

HYDROPHORIA.

Hydrophoria, Robineau-Desvoidy, Essai sur les Myodaires, p. 503 (1830).

The principal characters of this genus are :—Kyes bare, in the male contiguous or

subcontiguous ; arista plumose ; abdomen of the male elongate, the first segment longer

than the following, and often appearing divided into two segments ; lower scale of the

tegule extending beyond the upper; third and fourth veins parallel or slightly

divergent towards the end; anal vein long, more or less distinctly reaching the border

of the wing; axillary vein not curved towards the anal vein.

I have distinguished the following species, all of which are described as new :—

1. Legs black or piceous «ee ee ee ee es plumosa.

Antenne wholly black 2. 6. 6. 6 6 8 8 ee eh ee ee 3.

3. Palpi yellowish ; abdomen yellowish, with brown dorsal spots or dorsal line. flavipalpis.

Palpi black ; abdomen grey, with dorsal stripe and transverse bands black . transversalis.

1. Hydrophoria plumosa, sp. o., ¢.

Cinereous ; three thoracic stripes, a dorsal stripe and transverse bands on the abdomen, antenne, palpi, and

legs, black.

Length 4°5 millim.

Front triangular; eyes contiguous; face and cheeks whitish, the face shorter than the front ; inferior part of

the cheeks narrow, with a row of bristles. Antenne black, inserted on the median line of the eyes ;

HYDROPHORIA. 333

second joint with a bristle; third joint double as long as the second ; arista long-plumose, thickened at

the base. Proboscis and palpi black. Thorax and scutellum cinereous, the thorax with three black

stripes, the lateral ones interrupted at the transverse suture ; metanotum grey. Abdomen conical, convex,

cinereous ; first segment black; the following segments with a black dorsal stripe, which is attenuated

towards the end; front borders of the second and third segments blackish-brown ; marginal macrocheetse

on the third and anal segments. Legs black; foot-claws and pulvilli scarcely elongate, the pulvilli

yellowish. Tegule whitish; halteres brown, with yellow knob, Wings greyish-hyaline ; small cross-

vein beyond the end of the first vein and beyond the middle of the discal cell; third and fourth veins

parallel; terminal section of the fourth vein longer than the penultimate section (about 3:2) ; posterior

cross-vein oblique and distinctly undulate.

Hab. Mexico, Amula in Guerrero 6000 feet (7. H. Smith).

A single male specimen.

2. Hydrophoria collaris, sp.n. 3¢ @. (Tab. VIII. figg. 11, 3; 11a, head in

profile, ¢ .)

Thorax whitish, black in the middle; abdomen yellow, with brown dorsal line and transverse bands ; antenne,

palpi, and legs rufous, the terminal part of the antenna, the tips of the middle and hind femora, and the

tarsi black.

Length 5-7 millim.

Head white, often silvery; front of the male triangular, black in the middle; eyes contiguous; face slightly

retracted, as long as the front; vibrisse strong, just at the oral margin, which is not prominent ; inferior

part of the cheeks narrow, with some fine bristly hairs. Antenne inserted a little beneath the median

line of the eyes, rufous; second joint with a bristle; third joint elongate, three times as long as the

second, descending to near the vibrisse, blackish towards the tip; arista long, short-haired, thickened at

the base. Proboscis blackish-brown ; palpi cylindrical, yellowish, sometimes black at the base. Thorax

with a whitish tomentum, which is absent immediately behind the transverse suture, forming thus a broad

blackish transverse band ; shoulder-edges somewhat rufous; scutellum blackish, with rufous hind border ;

metanotum whitish-grey. Abdomen elongate, somewhat cylindrical, yellowish, with a brown dorsal line,

which on the second and following segments is dilated into trigonal spots and often to a band at the front

borders; marginal macrochxte present on the second and following segments, lateral macrochate

on all the segments. Legs slender, rufous, including the front cox, the middle and hind femora, and

the tibiae more or less, with black tips, the tips of the front femora also sometimes slightly infuscate, the

tarsi black ; front tarsi longer than the tibie; foot-claws and pulvilli elongate in the male, the pulvilli

yellowish. Tegule whitish ; halteres rufous. Wings yellowish-grey ; small cross-vein under the end of

the first vein and distinctly beyond the middle of the discal cell; third vein slightly curved upwards at

the tip; terminal section of the fourth vein longer than the penultimate section (35:2); posterior cross-

vein undulate.

The female resembles the male, save the usual sexual differences ; the front is as broad as the eyes; the frontal

band is black, sometimes slightly rufous (in recently emerged specimens); the black coloration of the

antenne is variable, it being sometimes more extended, leaving the basal joints only rufous, or, on the

contrary, nearly the whole of the antenne is rufous. ‘The whitish colour on the prothorax is interrupted

by two broad black bands. The abdomen is conical. The terminal section of the fourth vein is but a

little longer than the penultimate section (25:2); the posterior cross-vein is nearer to the tip of the

wing.

Hab. Mexico, Amula, Xucumanatlan, Sierra de las Aguas Escondidas, and Omilteme,

all in Guerrero, 6000 to 8000 feet (Z. H. Smith).

Several specimens of both sexes.

354 DIPTERA.

8. Hydrophoria flavipalpis, sp.n., 3 ¢.

Thorax whitish, black in the middle; abdomen yellow, with brown dorsal spots; antenne black; palpi and

legs rufous, the tips of middle and hind femora and the tarsi black.

Length 5-7 millim.

Closely allied to the preceding species (H. collaris), differing principally in having the antenne wholly black.

The scutellum is unicolorous blackish-brown; the markings on the abdomen are sometimes reduced to a

row of blackish spots, forming an interrupted dorsal stripe.

Hab. Mexico, Venta de Zopilote 2800 feet, Chilpancingo 4600 feet, Amula 6000 feet,

and Sierra de las Aguas Escondidas 7000 feet, all in Guerrero (H. H. Smith).

Seven male and two female specimens.

4, Hydrophoria transversalis, sp.n., ¢ 9. (Tab. VIII. fig. 12, ¢.)

Grey ; thoracic stripes, scutellum, a dorsal stripe and transverse bands on the abdomen, antenne, palpi, and

legs black, the middle and hind femora (in the female all the femora), except at the tip, rufous.

Length 6 millim.

Front of the male black, triangular, the eyes being contiguous ; in the female the front is as broad as the eyes,

with a black frontal band and laterally whitish (sometimes the frontal band is slightly rufous); face and

cheeks greyish-white, the face perpendicular; inferior part of the cheeks narrow, with.a row of bristles ;

vibrissee at the oral margin, which is not prominent. Antenne black or blackish-brown, inserted on the

median line of the eyes; second joint with a bristle; third joint twice as long as the second; arista

moderately plumose. Proboscis and palpi black. Thorax grey, the shoulders whitish ; on the prothorax

are two broad, more or less distinct black stripes, which behind the transverse suture are confounded in

the more general blackish colour of the thoracic dorsum ; scutellum brownish-black. Abdomen of the

male conical, grey, with a black dorsal stripe, which is triangularly enlarged on the first segment, and

extended to a front border on the second and following segments: it is clothed with many bristly hairs ;

long macrochete present laterally on all the segments and on the hind borders of the third and anal

segments. In the female the abdomen is more ovate, pointed towards the tip, for the rest similar in

coloration and markings to that of the male, but less hairy. Legs slender, black; middle and hind

femora rufous to near the apex; in the female the front femora are ulso rufous in their basal half; tibia

with scattered bristles ; foot-claws, and especially the pulvilli, elongate in the male, the pulvilli yellowish- -

white. Tegule and halteres yellowish. Wings greyish-hyaline; small cross-vein under the end of the

first vein and a little beyond the middle of the discal cell; third and fourth veins parallel; terminal

section of the fourth vein longer than the penultimate section (3:2); posterior cross-vein straight or

slightly concave.

Hab. Mexico, Xucumanatlan, Omilteme, and Sierra de las Aguas Escondidas, all in

Guerrero 7000 to 9500 feet (H. H. Smith).

Several specimens of both sexes.

POGONOMYIA.

Pogonomyia, Rondani, Dipt. Ital. Prodr. vi. p. 32 (1877).

Rondani has characterized this genus as follows :—Eyes bare, subcontiguous in the

male; front porrect; oral margin densely haired at the sides; antenne short, the

second joint bristly; arista nearly bare. Hind femora with a row of bristles beneath ;

middle tibie with bristles on the outer and hinder sides. Lower scale of the tegule

POGONOMYIA.—ANTHOMYIA. 335

extending a little beyond the upper. Small cross-vein under the end of the first vein ;

anal vein elongate, but not reaching the border of the wing.

A single species from Northern Mexico may be considered as belonging to the genus

Pogonomyia.

1. Pogonomyia aterrima, sp.n. 3 @. (Tab. VIII. figg. 138, ¢; 13a, head

‘in profile, ¢.)

Unicolorous black, including the antenne, palpi, and legs ; wings blackish-brown.

Length 5 millim.

Eyes occupying nearly the whole of the head in the male, separated by a broad front in the female; face

shorter than the front; internal orbits narrowly white; oral margin and underside of the head thickly

clothed with bristly hairs. Thorax, scutellum, and abdomen deep black, in the male with many hairs and

macrochetz, in the female glossy and less pilose; abdomen in the male elliptical, with the first segment

longer than the second, in the female pointed towards the tip. Legs black, slender, bristly ; foot- claws

and pulvilli slightly elongate (¢), the pulvilli whitish. Tegule blackish. Wings (¢) blackish-brown,

darker at the base and along the costa; basal portion of the costa concave; small cross-vein under the

end of the first vein and beyond the middle of the discal cell; third and fourth veins parallel; terminal

section of the fourth vein longer than the penultimate section (3:2); posterior cross-vein straight and

nearly perpendicular. In the female the coloration of the wings is less obscure and the costa is not

concave at the base.

Hab. Mexico, Ciudad in Durango 8100 feet (forrer).

Three male and three female specimens.

ANTHOMYIA.

Anthomyia, Meigen, in Illiger’s Mag. ii. p. 281 (1803).

The genus Anthomyia, as restricted by Rondani (Dipt. Ital. Prodr. vi. p. 150) and

Meade (Ent. Monthly Mag. xx. p. 109), includes only those species with the eyes

bare, and nearly or quite contiguous in the male; the arista bare or microscopically

pubescent; the abdomen of the male elongate, with the first segment longer than the

second; the legs simple; the anal vein reaching, though sometimes indistinctly, the

border of the wing; and the tegule unequal, the under scale being visible.

Three Mexican species have been recognized by me, but from the male sex only; all

are described as new :—

1. Wings deep brown along the costa . . . . 1. 1 ee ee ew ee elongata.

Wings not brown along the costa. 2. . 1 ww we ee ee

2. Abdomen with black dorsal spots. . . . . 1. 2 1 ew ee ew eee dorsimaculata.

Abdomen with a black dorsal stripe and transverse bands. . . . . . . segmentata.

1. Anthomyia elongata, sp.n.,g. (Tab. VIII. figg. 14; 144, head in profile.)

Thorax anteriorly whitish, with black stripes; abdomen long and narrow, hairy, grey, with a black dorsal

line; antenne, palpi, and legs black; wings brownish.

Length 5°5 millim.

Front triangular, black; face and cheeks whitish, the cheeks narrow and their inferior portion nearly linear.

336 DIPTERA.

Antenne inserted on the median line of the eyes, blackish, the basal joints somewhat brownish-rufous ;

second joint with a bristly hair; third joint three times as long as the second ; arista bare. Proboscis

and palpi black. Thorax blackish, anteriorly with white tomentum and indistinct black stripes, the

pleure also whitish; scutellum black. Abdomen flattened, elongate, narrower than the thorax, with

parallel sides, obscure grey, with a black dorsal line, which is most distinct on the last three segments ;

anus and genitalia greatly developed; many hairs and long lateral and marginal macrochete on all the

segments. Legs black, long and slender, with numerous bristles ; the knees of the front pair dark

rufous ; foot-claws and pulvilli elongate, the pulvilli whitish. Tegule whitish, small; halteres yellow.

Wings brownish, darker along the costa; small cross-vein under the end of the first vein and on two-

thirds of the discal cell; third and fourth veins parallel ; terminal section of the fourth vein nearly twice

as long as the penultimate section ; posterior cross-vein almost straight.

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith).

Two male specimens.

2. Anthomyia dorsimaculata, sp. n., ¢.

Grey ; thorax anteriorly whitish; abdomen with black dorsal spots ; palpi and legs black, the tibiee piceous.

Length 5 millim.

Allied to the preceding species (A. elongata). The abdomen is similarly flattened, but shorter; the black

dorsal line is represented by large black spots on the segments; the black stripes on the whitish prothorax

are still less conspicuous; the antenne are clearer and more generally brownish-rufous in colour ; the

tibie are piceous, somewhat testaceous; the tegule are very small, and the lower scale scarcely visible ;

the wings have a more dilute brownish tinge, which is not more obscure along the costa; the neuration is

similar.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

Five male specimens.

Another male specimen, from Sierra de las Aguas Fscondidas in Guerrero, 9500 feet

(H. H. Smith), agrees with them in the shape and markings of the abdomen and in the

coloration of the wings, but differs in having wholly black antenne and legs.

8. Anthomyia segmentata, sp. n., ¢.

Cinereous ; thorax with indistinct stripes; abdomen with a dorsal line and the front borders of the segments

_ black; antenna, palpi, and legs black.

Length 4°5 millim.

This species also is allied to A. elongata and still more nearly to A. dorsimaculata ; the thorax is cinereous,

with some indistinct blackish stripes, the whitish coloration on the prothorax and at the sides being absent ;

the abdomen is similar in shape to that of A. dorsimaculata, but the ground-colour is more cinereous, and

a black dorsal stripe extends uninterruptedly over its whole length and is crossed by black transverse

bands at the front borders of the segments. The antenne and legs are unicolorous black ; the antenne

are shorter, their third joint one and a half times as long as the second. The wings are greyish-

hyaline.

Hab. Mexico, Omilteme 8000 feet and Sierra de las Aguas Escondidas 9500 feet,

both in Guerrero (H. H. Smith).

Three male specimens.

In the Central-American collections before me there are several females belonging to

the genus Anthomyia in its restricted sense, but none of them can be placed with any

ANTHOMYIA.—HYLEMYIA. 337

certainty with the above-described males. I abstain, however, from giving names to

the females and from describing them: the number of species which apparently never

will be recognized is already enormous in dipterology.

LASIOPS.

Lasiops, Meigen, Syst. Beschr. vii. p. 323 (1838).

This genus is mentioned here because Dr. Giglio-Tos has described a Mexican species

under the name of Lasiops mexicana. I venture to suggest, however, that this may be

identical with Z'richophthicus crenatus, Bigot (antead, p. 331). Both genera have the

eyes pilose and contiguous in the male, the arista bare or somewhat pubescent, &c. ;

but Lasiops differs from Trichophthicus in having the abdomen shorter (the first segment

in the male not longer than the second), the lower scale of the tegule wholly covered

by the upper, and the anal vein elongate, reaching more or less distinctly to the border

of the wing. It is possible that even such an intelligent dipterologist as Dr. Giglio-Tos

has made a mistake in the determination of the genus of this minute insect.

1. Lasiops mexicana.

Lasiops mexicana, Gigl.-Tos, Boll. Mus. Zool. Comp. Anat. di Torino, vii. no. 147, p. 10°; Mem.

R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 28°.

Hab. Mexico !?.

HYLEMYIA.

Hylemyia, Robineau-Desvoidy, Essai sur les Myodaires, p. 550 (1830).

The genus Hylemyia is principally distinguished by the following characters :—Hyes

bare, nearly or quite contiguous in the male; arista plumose; abdomen elongate, the

- first segment (in ¢ ) nearly double as long as the second; legs slender; tegule small,

the lower scale covered by the upper; anal vein elongate, reaching more or less

conspicuously to the border of the wing. It is closely allied to Hydrophoria, but differs

from it in the less developed tegule, of which the lower scale is not visible.

Three Mexican species are known to me, all of which are described as new :—

1. Proboscis longer than the head, thin, and without enlarged terminal lips

(legs rufous). 2 6 ee ee eee ee eee we we ee tenuirostris.

Proboscis of usual shape. . . woe eee ee we

2. Legs wholly black ; abdomen with a black dorsal line woe » . . urbica,

Legs black, with the middle and hind femora rufous at the base; “abdomen

1. Hylemyia tenuirostris, sp. n.,3. (Tab. VIII. figg. 15; 15a, head in

profile.)

Cinereous ; abdomen with a black dorsal line; legs rufous, with black tarsi; antenne black ; proboscis long

and slender.

Length 5:5 millim.

BIOL. CENTR.-AMER., Dipt., Vol. IT., December 1896. 24

338 DIPTERA.

Head in profile somewhat quadrate; front slightly prominent, triangular, the eyes nearly contiguous ; face

and cheeks whitish-grey, the lower portion of the latter with brown reflections, impressed, and as broad

as half the longitudinal diameter of the eyes. Antenne blackish-brown, short, inserted on the median

line of the eyes; second joint with a bristle; third joint double as long as the second; arista long-

plumose, distinctly thickened at the base. Proboscis black, rufous at the base, thin, longer than the head,

the terminal lips not thicker ; palpi cylindrical, slender, black, with rufous base. Thorax cinereous, on

the upperside blackish, with indistinct stripes; scutellum black. Abdomen elongate, cylindrical,

cinereous, with a black dorsal line, which is more or less interrupted at the incisions; lateral and

marginal macrochete on all the segments. Legs rufous, the tarsi black; a blackish stripe on the upper-

side of the front femora; the femora and tibie with many bristles; foot-claws and pulvilli elongate, the

pulvilli yellowish. Tegule whitish ; halteres pale rufous. Wings with a greyish-rufous tinge; small

cross-vein under the end of the first vein and distinctly beyond the middle of the discal cell; third and

fourth veins parallel; terminal section of the fourth vein nearly twice as long as the penultimate section ;

posterior cross-vein slightly curved.

Hab. Muxico, Tepetlapa 3000 feet and Amula 6000 feet, both in Querrero

(H. H. Smith).

Two male specimens.

2. Hylemyia urbica, sp. n.,¢.

Cinereous ; thoracic stripes, a dorsal line on the abdomen, antenna, palpi, and legs black.

Length 5 millim, .

Front dark rufous, triangular, the eyes contiguous ; ocellar tubercle prominent; face and cheeks whitish-grey,

the inferior portion of the latter equalling one-third of the longitudinal diameter of the eyes. Antenne

black, inserted above the median line of the eyes; second joint with a bristle ; third joint double as long

as the second; arista distinctly plumose, slightly thickened at the base. Proboscis and palpi black, the

proboscis of usual shape, with enlarged terminal lips. Thorax and scutellum cinereous; the thorax with

two black dorsal stripes, laterally whitish-grey ; metanotum grey. Abdomen elliptical, cinereous, with a

black dorsal stripe ; the segments with lateral and marginal macrochete, arising from black points. Legs

black, the tibie piceous and with scattered bristles ; foot-claws and pulvilli slightly elongate, the pulvilli

whitish. Tegule whitish; halteres yellow. Wings greyish-hyaline, with a minute costal spine; the

neuration as in H. tenuirostris; the posterior cross-vein nearly straight.

Hab. Mexico, Mexico city (H. H. Smith).

A single male specimen.

3. Hylemyia monticola, sp. n., ¢.

Cinereous ; two bands on the thorax, a dorsal line and transverse bands on the abdomen, antenne, palpi, and

legs black, the middle and hind femora rufous.

Length 4:5 millim.

Front black, triangular, the eyes contiguous ; ocellar tubercle not prominent; face and cheeks whitish-grey ;

lower part of the cheeks narrow. Antenne black, inserted on the median line of the eyes; second joint

with a bristle ; third joint nearly three times as long as the second ; arista moderately plumose. Thorax

cinereous, with two broad black bands, at the sides whitish; scutellum blackish; metanotum grey.

Abdomen elliptical, cinereous, with a black dorsal line and black front borders to the segments ; lateral

and marginal macrochexte on all the segments. Legs black, the basal half of the middle femora and the

basal two-thirds of the hind femora rufous ; foot-claws and pulvilli slightly elongate, the pulvilli yellowish.

Tegule whitish ; halteres pale yellow. Wings brownish-hyaline; no costal spine ; neuration as in the

preceding species ; posterior cross-vein straight.

HYLEMY1A.—PHORBIA. 339

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 7000 feet (H. H. Smith).

A single male specimen.

CHORTOPHILA.

Chortophila, Macquart, Suites & Buffon, Dipt. ii. p. 323 (1835).

This genus is closely allied to Anthomyia (in its restricted sense) and also to

Hydrophoria. From the former it differs in the more cylindrical abdomen of the male ;

from the latter in the bare arista; and from both in the smaller tegulz, of which the

under scale is wholly covered by the upper.

In the Central-American collections there is a specimen of a species which seems to

belong to this genus; but as it is represented by a female individual only, it would be

of doubtful value if I described it. I may remark, however, that the insect is quite

different from C. stlemba, Gigl.-Tos (of which also the female sex only is known); it

bears a close resemblance to the female of Hydrophoria collaris (anted, p. 333),

though differing from the latter in several characters.

1. Chortophila ——?

Hab. Mexico, Medellin near Vera Cruz (H. H. Smith).

PHORBIA.

Phorbia, Robineau-Desvoidy, Essai sur les Myodaires, p. 559 (1830).

The characters of this genus are: eyes bare, contiguous or subcontiguous in the

male ; arista bare; abdomen elongate, usually flattened, the first segment longer than

the second; tegule equal, the lower scale covered by the upper; anal vein elongate,

more or less distinctly reaching the border of the wing.

I have distinguished three Mexican species, which are described as new :—

1. Eyes of the male separated by a linear, whitish front; abdomen not hairy . . morosa.

1. Phorbia morosa, sp. n., 3.

Cinereous ; head whitish, with linear front; abdomen with a black dorsal stripe, not hairy; antenne, palpi,

and legs black ; tegule whitish; wings greyish-hyaline.

Length 3°5 millim.

Front linear, white, with a black median line ; face and cheeks whitish, the inferior part of the latter very

narrow. Antenne black, inserted above the median line of the eyes; second joint with minute bristles ;

third joint three times as long as the second; arista thickened in its basal half. Proboscis and palpi

black. Thorax and scutellum cinereous, the thorax with indistinct stripes. Abdomen elliptical, flattened,

cinereous, the second and following segments with a black dorsal stripe, which is sometimes dilated into

trigonal spots ; some weak macrochwte at the sides and on the anal segment. Legs black, proportionally

short; foot-claws and pulvilli not elongate, the pulvilli yellowish. Tegule whitish; halteres yellow,

2a 2

340 DIPTERA.

Wings greyish-hyaline ; small cross-vein under the end of the first vein and beyond the middle of the

discal cell; third and fourth veins parallel; terminal section of the fourth vein nearly double as long

as the penultimate section ; posterior cross-vein straight.

Hab. Mexico, Mexico city (H. H. Smith).

A single male specimen.

2. Phorbia fuscisquama, sp. n., 3.

Black; eyes contiguous ; abdomen hairy, cinereous, with black dorsal spots ; tegule and wings brownish.

Length 4 millim.

Head blackish ; ocellar knob somewhat prominent; inferior part of the cheeks very narrow ; oral margin and

underside of the head with many hairs. Antenne black, inserted a little above the median line of the

eyes; second joint with a bristle; third joint nearly double as long as the second. Proboscis and palpi

black. Thorax and scutellum unicolorous black, the thorax with many bristles. Abdomen elliptical,

slightly convex, hairy, cinereous, with a row of black dorsal spots ; marginal macrochete present on the

third and anal segments. Legs black, slender; front femora densely haired posteriorly ; tibie with

scattered bristles ; foot-claws and pulvilli short. Tegule brownish ; halteres yellow. Wings brownish ;

small cross-vein under the end of the first vein and beyond the middle of the discal cell; third and fourth

veins nearly parallel; terminal section of the fourth vein much longer than the penultimate section

(5 or 6:2); posterior cross-vein perpendicular, very slightly concave, nearly straight ; anal vein not

reaching the border of the wing.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

Five male specimens.

3. Phorbia prisca, sp. n., 3 2.

Cinereous; eyes contiguous ; abdomen hairy, with a black dorsal stripe; antenne, palpi, and legs black ;

tegule whitish ; wings greyish-hyaline.

Length 3°5 millim.

Front of the male triangular, black, with the lateral margins white ; eyes contiguous ; in the female the front

is broader than the eyes, cinereous, with the frontal band broad, brown, before the antennz somewhat

rufous ; face and cheeks whitish-grey ; inferior part of the cheeks linear in the male, slightly broader in

the female. Antennz black, inserted on the median line of the eyes ; second joint with a bristle ; third

joint nearly double as long as the second. Proboscis and palpi black. Thorax and scutellum cinereous ;

thoracic dorsum usually unicolorous, but in some of the female specimens with traces of brownish stripes.

Abdomen (<) elliptical, slightly flattened, hairy, greyish-cinereous, with a black dorsal stripe and more

or less conspicuous black front borders to the segments ; sometimes the dorsal stripe is interrupted at the

incisions and appears as a row of trigonal spots. In the female the abdomen is pointed towards the tip ;

the hairs are much shorter, and the black markings are less distinct. Legs black, slender, with many

bristly hairs ; foot-claws and pulvilli short in both sexes. Tegule white; halteres yellow. Wings

greyish-hyaline ; small cross-vein nearly under the end of the first vein and beyond the middle of the

discal cell; third and fourth veins parallel; terminal section of the fourth vein longer than the penultimate

section (3 or 4: 2); posterior cross-vein straight ; anal vein reaching the border of the wing.

Hab. Muxico, Ciudad in Durango 8100 feet (Forrer), Patzcuaro (Lf. D. Godman),

Jalisco (Schumann).

Three male and four female specimens.

There are still several female specimens of Phorbia in the Mexican collections before

me, but they cannot be dealt with upon that sex alone.

CHARADRELLA. 341

CHARADRELLA, gen. nov.*

> to Dad

Head broader than the thorax; front of the female as broad as the eyes, that of the male a little narrower ;

face perpendicular, longer than the front, in the middle deeply excavated; facial ridges sharply projecting,

inferiorly slightly curved inwards ; vibrisse just at the oral margin, which is not at all prominent ; some

very short bristles above them on the ridges. Eyes bare, elliptical. Inferior part of the cheeks equalling

one-fourth of the longitudinal diameter of the eyes. Antenne inserted above the median line of the

eyes; basal joints short; third joint very long, lying down in the facial groove ; arista finely and long-

plumose over its whole length. Proboscis with distinct terminal lips; palpi slightly enlarged towards the

tip. Thorax quadrate ; scutellum semicircular. Abdomen elliptical (¢ ) or ovate (2); third and anal

segments with marginal macrochexte. Legs long, proportionally strong, with some weak bristles; foot-

claws and pulvilli elongate in the male, Tegule large, the upper scale much shorter than the under. Wings

broad, longer than the abdomen, without costal spine ; third and fourth veins divergent towards the tip

of the wing, the third slightly curved ; small cross-vein before the end of the first vein, and nearly on, or a

little beyond, the middle of the discal cell ; anal vein long, but not fully reaching the border of the wing.

As the fourth vein is not curved, but runs directly to the tip of the wing, this genus

is included here among the Anthomyine; on account, however, of the presence of a

perpendicular row of macrochete on the hypopleure, before the halteres, it would not

belong to the Anthomyine in the sense of Girschner’s system of the Muscide Calyptere

(Berl. entom. Zeitschr. xxxviil. p. 297).

Charadrella seems to be nearly allied to the Australian genus Pygophora, Schiner

(Reise der Novara, Dipt. p. 295), which likewise is distinguished by a deep facial

groove; the latter, however, has the arista bare at the tip, the tegule small, and the

third and fourth veins parallel.

1. Charadrella macrosoma, sp. n.,¢ 2. (Tab. VIII. figg. 16, ¢; 16a, head

in profile, ¢; 164, head seen from in front, 3 .)

Yellow or testaceous; thoracic dorsum infuscated with grey tomentum and four blackish stripes ; abdomen

posteriorly black; antenna, palpi, and legs brown (¢ ) or rufous ( @ ).

Length 9-10 millim.

Male. Head pale ochraceous ; frontal band with a yellowish-white reflection; hind orbits white. Antenne

and palpi rufous-brown ; arista yellow ; proboscis ochraceous. ‘Thoracic dorsum brown, whitish-grey-

pollinose ; before the transverse suture with four distinct brown stripes; scutellum rufous, at the sides

blackish-brown. Abdomen with the first two segments yellow and somewhat transparent; second

segment with a black dorsal stripe, which is enlarged posteriorly and extended laterally into a narrow

margin along the hind border of the segment ; third and anal segments shining black; the incisions of

the segments silvery-white. Legs blackish-brown, the base of the femora and the knees rufous, the tarsi

black; foot-claws pale yellow, with black tips; pulvilli whitish. Tegule yellowish-white. Wings

greyish- or brownish-hyaline ; second, third, and fourth veins clouded with brown at the tip.

In the female the head is of a brighter ochraceous colour; the antenne, palpi, and legs are rufous, the tibia,

especially of the hind pair, sometimes infuscate, the tarsi, however, always black. The abdomen is not

transparent at the base and of a more rufous colour; the black marking is less constant, the third and

anal segments being seldom wholly black, but usually with rufous portions, either laterally or at the

front borders; the black dorsal stripe on the second segment is usually absent, but the black hind border

is often broader ; in some specimens, on the contrary, the black portion is reduced to narrow hind borders

to the segments ; the silvery incisions are seldom absent.

Hab. Mexico, Northern Yucatan (Gaumer).

A very large series of specimens

* yapacpa, groove.

342 DIPTERA.

Mesembrina anomala, Jaennicke (Neue exot. Dipt. p. 69), from Cuba, seems to agree

in many respects with the present insect, but, according to the figure (tab. 2. fig. 4),

it has a much broader abdomen and a narrow front (¢). Moreover, in the description

nothing is said about the peculiar facial groove, which certainly would not have been

overlooked by the author.

LISPE.

Lispe, Latreille, Précis des caract. génér. des Insectes, p. 169 (1796).

This genus is distinguished from all other Anthomyine by the spoon-like enlarged

palpi; the front is broad in both sexes; the abdomen is ovate, usually with blackish

markings ; the tegule are large, the under scale extending beyond the upper; the anal

vein is short.

1. Lispe uliginosa.

Lispe uliginosa, Fallén, Dipt. Sueciz, Muscide, p. 93°; Meigen, Syst. Beschr. v. p. 2267; Léw,

Stett. ent. Zeit. vill. p. 24°; Schiner, Faun. Austr., Dipt. i. p. 662*; Meade, Ent. Monthly

Mag. xiv. p. 252°,

Hab. Nortu America®.—Mexico, Patzcuaro (f. D. Godman), Mexico city (A. H.

Smith).—Eurore 1-4,

Four females from Mexico, perfectly agreeing with European examples.

2. Liispe serotina, sp. n.,¢ 2.

Black ; face, sides of the thorax, dorsal spots, and lateral stripes on the abdomen whitish ; palpi yellow ; tibie

testaceous.

Length 3°5—-5 millim. .

Of smaller size than L. uliginosa and of a blacker coloration. Front black, on the vertex broader than the

eyes, narrower above the antenn ; face and cheeks whitish. Antenne black, inserted distinctly above

the median line of the eyes. Proboscis black; palpi yellow. Thorax blackish, with indistinct black

stripes; the sides grey (¢ ) or white (2); scutellum black. Abdomen of the male subcylindrical, black, .

with a dorsal line and narrow hind margins to the segments whitish-grey, the anal segment globular ;

abdomen of the female ovate, black, with triangular whitish dorsal spots and whitish lateral stripes. Legs

black, the tibize obscure testaceous ; middle tibia with one or two bristles, in addition to the terminal

spurs; foot-claws and pulvilli short in both sexes. Tegule small, whitish; halteres yellow. Wings

greyish-hyaline; small cross-vein under the end of the first vein and nearly on the middle of the discal

cell; posterior cross-vein perpendicular and straight.

Hab. Mexico, Atoyac and Medellin in Vera Cruz, Teapa in Tabasco, and Mexico

city (H. H. Smith).

A male and two female specimens.

CENOSIA. 343

CGENOSIA.

Cenosia, Meigen, Syst. Beschr. v. p. 210 (1826).

In this genus the front is broad in both sexes, the arista is bare or pubescent ; the

palpi are of the usual cylindrical or filiform shape; the abdomen is somewhat elongate

and ending in a club (<4 ), or ovate and pointed at the tip (2); the under scale of the

tegule extends beyond the upper; the small cross-vein is usually beyond the end of

the first vein; and the anal vein is short.

T have distinguished the following species from Mexico, all of which are described

as new :—

Palpi brown or black . 2... 1 ww we ee ee ee ee ee

2. Antenne black . . . . See ee ee eee we we ww ee purnctulata.

Antennz yellow or partly yellow . oe ee

3. Legs yellow; middle and hind femora black at the tip wee ww we Lenuicornis.

Legs yellowish-rufous . . . . RE 8.002 71002

4. Abdomen yellow and transparent at the base . soe ee we eee ee) =«macrocera.

Abdomen cinereous or black . . . . rr P

5. Legs yellow ; the front femora, except the tip, black wee ew ew ww we 6femoralis.

Legs black, or with the black colour predominating . . . . . . . . . bistriata.

1. Ceenosia punctulata, sp.n., ¢ 2.

Cinereous ; abdomen with a dorsal line and two lateral points on each segment black; antenne black; palpi

yellow ; legs rufous.

Length 3°5 millim.

Front black, as broad as the eyes ; frontal bristles long; face and cheeks greyish-white ; inferior part of the

cheeks narrow. Antenne inserted above the median line of the eyes, black ; second joint with a whitish

tip; third joint double as long as the second; arista bare. Proboscis black; palpi small, filiform,

yellow. Thorax and scutellum cinereous, the thorax sometimes with indistinct brown stripes; meta-

notum grey. Abdomen ovate, cinereous; second and third segments with an interrupted blackish dorsal

line and on each side of it a blackish point, the dorsal line sometimes less conspicuous; some weak

macrochsetz on the third and anal segments. Legs yellowish-rufous, with black tarsi; hind tibie with

three long bristles posteriorly ; foot-claws and pulvilli somewhat elongate in the male, the pulvilli

yellowish. Tegule whitish; halteres pale yellow. Wings greyish-hyaline; small cross-vein beyond the

end of the first vein and nearly on the middle of the discal cell; third and fourth veins parallel ;

terminal section of the fourth vein much longer than the penultimate section (2 or 3:1); posterior cross-

vein straight, slightly oblique.

Hab. Mexico, Patzcuaro (F. D. Godman), Xucumanatlan 7000 feet and Omilteme

8000 feet, both in Guerrero (H. H. Smith).

Two male and several female specimens.

2. Ceenosia tenuicornis, sp. n., 2.

Cinereous ; a dorsal line and large lateral spots on the abdomen brown; antenne and palpi yellow; legs

rufous, the middle and hind blag at the tip. :

Length 3 millim. as hee teh Se

Front as broad as the eyes, cinereous, with two blackish stripes ; frontal bristles long; face and cheeks white ;

344 DIPTERA.

inferior part of the cheeks linear. Antenne yellow, inserted above the median line of the eyes; second

joint with a bristle ; third joint double as long as the second, thin and slender, slightly infuscate towards

the tip; arista pubescent. Proboscis black; palpi yellow, small, filiform. Thorax cinereous, with

indistinct brown stripes; scutellum brown; metanotum grey. Abdomen cinereous, elliptical, pointed

towards the tip; first three segments with a brown dorsal stripe and two large brown spots; weak

macrochete on the third and anal segments. Legs yellowish-rufous, the tarsi slightly infuscate, the

middle and hind femora black at the tip; hind tibia with three long bristles. Tegule and halteres

yellow. Wings with a yellowish-grey tinge ; small cross-vein beyond the end of the first vein and beyond

the middle of the discal cell; third and fourth veins slightly curved and parallel; terminal section of the

fourth vein double as long as the penultimate section ; posterior cross-vein straight and nearly

perpendicular,

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

A single female specimen.

3. Ceenosia oscillans, sp. n., 3.

Grey ; base of the abdomen yellow and transparent ; palpi, base of the third antennal joint, and legs yellowish-

rufous.

Length 5 millim,

Front as broad as the eyes, greyish-cinereous; face and cheeks white; inferior part of the cheeks linear.

Antenne inserted above the median line of the eyes; basal joints black, the second white at the tip;

third joint three times as long as the second, yellowish-rufous at the base, blackish-brown towards the

apex ; arista pubescent, its basal joint conspicuous. Proboscis rufous-brown, the tip black ; palpi yellow,

small, slightly enlarged towards the apex. Thorax and scutellum greyish-cinereous, the prothorax with the

sides above the front coxe whitish; thoracic dorsum with indistinct brown stripes; the macrochete

arising from black points. Abdomen subcylindrical, yellow, transparent, gradually becoming grey

and opaque on the last segments ; indistinct brownish spots at the sides of the median segments; male

genitalia yellowish-rufous; long macrochete present at the sides and on the anal segment. Legs

yellowish-rufous, the tarsi brown ; foot-claws and pulvilli rather short. Tegule and halteres yellowish.

Wings greyish-hyaline ; small cross-vein beyond the end of the first vein and a little beyond the middle

of the discal cell; third and fourth veins slightly curved and parallel; terminal section of the fourth

vein longer than the penultimate section (3:2); posterior cross-vein straight, nearly perpendicular. |

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen.

4, Cenosia macrocera, sp.n. ¢ 2. (Tab. VIII. figg. 17, ¢; 17a, head in

profile, 3.)

Cinereous; abdomen with yellow base and brown dorsal spots, blackish towards the apex; legs yellowish-

rufous; antenne and palpi black.

Length 4-5 millim.

Front as broad as the eyes, grey, with blackish stripes; face and cheeks whitish, the face slightly retracted,

the cheeks narrow, their inferior part under the eyes linear ; occiput grey, somewhat convex. Antenne

black, inserted much above the median line of the eyes; second joint white at the tip; third joint four

times as long as the second, reaching to near the vibrisse; arista long, microscopically pubescent.

Proboscis and palpi black ; the palpi small, filiform. Thorax and scutellum greyish-cinereous ; thoracic

dorsum with indistinct brown stripes; metanotum grey. Abdomen of the male cylindrical, first and

second segments yellow and slightly transparent, with a large triangular brown spot, the third and anal

segments blackish, with some grey tomentum; that of the female elliptical, pointed towards the tip,

yellow, with a dorsal stripe and the hind borders of the segments blackish ; often the ground-colour of

the terminal segments is more greyish ; some macrochexte present at the sides of the segments and also

CQNOSIA. 345

on the anal segment. Legs slender, yellowish-rufous, the tarsi blackish, the hind femora infuscate at the

tip; hind tibiz with three long bristles posteriorly ; foot-claws and pulvilli short in both sexes. Tegule

whitish ; halteres yellow. Wings greyish-hyaline; neuration as in the preceding species.

Hab. Mexico, Omilteme 8000 feet and Sierra de las Aguas Escondidas 9500 feet,

both in Guerrero (H. H. Smith).

Three male and five female specimens.

5. Conosia femoralis, sp.n., ¢ 2.

Cinereous; the stripes on the thorax and the large spots on the abdomen blackish ; antenne and palpi black ;

legs rufous, the front femora and tarsi black.

Length 3—4 millim.

Front nearly as broad as the eyes, laterally whitish; frontal band deep black, bifid behind ; face and cheeks

white, the cheeks narrow, their inferior part under the eyes linear. Antenne black, inserted above the

median line of the eyes ; second joint with a bristle ; third joint one and a half times as long as the second,

reaching to half the length of the face; arista long, microscopically pubescent. Proboscis and palpi

black. Thorax, scutellum, and abdomen cinereous ; thoracic dorsum with four more or less distinct brown

stripes, which posteriorly are united in pairs. Abdomen of the male cylindrical, somewhat hairy, each

segment with a large spot, which occupies nearly the whole hind border; that of the female elliptical,

pointed towards the tip, more generally obscure, the black markings less conspicuous. Legs rufous, with

black tarsi, the front femora black to near the tip, the middle and hind femora sometimes more or less

infuscate ; tibiae with some long bristles ; foot-claws and pulvilli short in both sexes. Tegule whitish ;

halteres yellow. Wings greyish-hyaline; neuration as in the preceding species.

Hab. Mexico, Orizaba (7. D. Godman & H. IT. Smitn), Chilpancingo in Guerrero

4600 feet, Mexico city and Vera Cruz (7. H. Smith).

One male and six female specimens.

6. Conosia bistriata, sp.n., ¢ 2.

Cinereous ; two bands on the thorax, hind borders of the abdominal segments, antenne, palpi, and legs black,

the base of the femora rufous.

Length 4°5 millim.

Front as broad as the eyes, cinereous ; face and cheeks whitish, the cheeks narrow, their inferior part linear.

Antenne black, inserted much above the median line of the eyes; second joint white at the tip; third

joint three times as long as the second; arista pubescent. Proboscis and palpi black. Thorax and

scutellum cinereous ; thoracic dorsum with two broad blackish bands, which are continued in lateral spots

on the scutellum. Abdomen elliptical, pointed towards the tip, cinereous; all the segments with a

blackish hind border, occupying half their length, and with a less distinct dorsal stripe; in some

specimens the black markings are still more extended and the cinereous ground-colour is only visible

laterally on the front borders of the segments. Legs black, the front knees and the base of the middle

and hind femora rufous; hind tibiz with two long bristles posteriorly ; foot-claws and pulvilli rather

elongate in the male, the pulvilli whitish. Tegule and halteres pale yellow. Wings greyish-hyaline

neuration as in the preceding species.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman), Teapa in Tabasco

(H. H. Smith).

One male and four female specimens. They vary in the colour of the legs: one

of the specimens has them black, without any rufous parts; and another has the

BIOL. CENTR.-AMER., Dipt., Vol. II., September 1897. 2y

346 DIPTERA.

legs, and even the palpi, yellowish. This latter may be a recently emerged and

not fully-coloured specimen. All have the characteristic blackish bands on the

thorax.

SCHGENOMYZA.

Schenomyza, Haliday, Ent. Mag. i. p. 166 (1888).

This genus differs from Cenosia in having smaller tegulx, of which the under scale

is wholly covered by the upper. I refer a minute Mexican species to it.

1. Schenomyza pulicaria, sp.n., 3. (Tab. VIII. fig. 18.)

Cinereous; four stripes on the thorax, three pairs of spots on the abdomen, antenna, palpi, and legs black.

Length 2 millim.

Front black, a little narrower than the eyes; face and cheeks whitish-grey ; inferior part of the cheeks broad,

equalling nearly half the longitudinal diameter of the eyes ; oral margin not prominent, with two distinct

vibrisse ; underside of the head with some bristly hairs. Antenne black; second joint with a small

bristle; third joint three times as long as the second; arista bare. Proboscis and palpi black. Thorax

and scutellum cinereous ; thoracic dorsum with four equidistant blackish lines ; pleure greyish. Abdomen

elliptical, obscure cinereous, the incisions somewhat clearer ; the second, third, and anal segments each

with two quadrangular black spots, which, however, are not very distinct; anal segment with some weak

macrochete. Legs black, slender, the tarsi longer than the tibie, the front knees slightly rufous; foot-

claws and pulvilli short. Tegule whitish; halteres yellow. Wings greyish-hyaline ; small cross-vein

beyond the end of the first vein and a little beyond the middle of the discal cell; third and fourth veins

slightly curved and parallel; terminal section of the fourth vein more than twice as long as the

penultimate section ; posterior cross-vein perpendicular and straight.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single male specimen.

' The following Mexican species of Anthomyine have been previously described, but

cannot be identified in the Central-American collections which I have examined :—

Hyetodesia rescita, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 315 (Aricia).

circulatriz, Walk. 1. c. p. 316 (Aricia).

parsura, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.)

p. 20.

abdicta, Gigl.-Tos, 1. c. p. 21.

insons, Gigl.-Tos, 1. c. p. 21.

Mydea abdita, Gigl.-Tos, 1. c. p. 23 (Spilogaster).

etesia, Gigl.-Tos, 1. c. p. 23 (Spilogaster).

meracula, Gigl.-Tos, |. c. p. 24 (Spilogaster)..

Spilogaster refusa, Gig). Tos, }. c. p. 22.

sera, Gigl.-Tos, l. c. p. 25.

scabra, Gigl.-Tos, 1. c. p. 25.

ANTHOMYINZ. 347

Brachyophyra effrons, Gigl.-Tos, 1. c. p. 26.

, Limnophora limbata, Bigot, Ann. Soc. Ent. Fr. 1885, p. 271.

normata, Bigot, l. c. p. 272.

rufipes, Bigot, 1. c. p. 272.

anthrax, Bigot, 1. c. p. 274.

Leucomelina strigata, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.)

p. 19. no. 164.

Homalomyia prostrata, Rossi, Fauna Etrusca, ii. p. 308 (Musca); Rondani, Dipt.

Ital. Prodr. vi. p. 50; Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2,

xlv. (sep.) p. 27.—Europe and Mexico.

Syn. Anthomyia lepida, Wiedem. Zool. Mag. i. p. 82; Meigen, Syst.

Beschr. v. p. 140 (excl. syn. Fall.).—Homalomyia lepida, Schiner, Fauna

Austr., Dipt. i. p. 655.—Aricia incisurata, Zett. Dipt. Scandin. iv. p. 157.

no. 191.—Aminta ludibunda, Rob.-Desv. Essai sur les Myodaires, p. 572.

(The synonymy by Rondani.)

“ Hydrophoria (%) pictipes, Bigot, Ann. Soc. Ent. Fr. 1885, p. 275.

Vv —— (?) calopus, Bigot, |. c. p. 275.

Anthomyia protritra, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 317.

trifilis, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 28.

Lasiops mexicana, Gigl.-Tos, 1. c. p. 28 (=Trichophthicus crenatus, Bigot, see

p. 331, antea) *.

Hylemyia probata, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 318.

levipes, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 30.

abrepta, Gigl.-Tos, |. c. p. 30.

rhodina, Gig].-Tos, 1. ¢. p. 31.

Chortophila stlemba, Gigl.-Tos, 1. c. p. 29.

Cenosia bicolor, Bigot, Ann. Soc. Ent. Fr. 1885, p. 8302 (Dialyta); Gigl.-Tos, 1. ¢.

p. 33.

—— pacifera, Gigl.-Tos, 1. c. p. 31.

vitilis, Gigl.-Tos, l. c. p. 32.

sevens, Gigl.-Tos, l. c. p. 32.

* Since the publication of pp. 321-344 of this volume, I have received a letter from Dr. Giglio-Tos in

which he states that his Lasiops mexicana=Trichophthicus crenatus, Big.

348 DIPTERA.

MUSCIDE ACALYPTERA.

Some remarks on this division of the Muscide will be found on p. 2 of this volume.

In general, the Acalypteree may be known from the Calypteree by the absence of

tegule, a few genera only having these organs more or less developed. In the

venation of the wings the species of this division approach the Anthomyine, the

fourth vein not being curved upwards to an apical cross-vein. The front is broad in

both sexes; the eyes are never coalescent in the males and mostly of a rounded form ;

the transverse suture is usually inconspicuous or wholly absent.

The Acalypterz include a great diversity of forms, and therefore are divided into a

large series of groups. The classification of Schiner (Fauna Austriaca, ii.) and Loew

(Monogr. of the Diptera of N. America, i.) is, save in a few cases, here followed.

Group CORDYLURINZ.

The principal characters of this group, which by its general facies is most nearly

allied to the Anthomyine, are:—Lateral borders of the front with bristles over their

whole length ; oral margin distinctly armed with vibrisse; abdomen elongate; body

and legs often hairy in the male; tibie with spurs; first vein of the wings double, the

auxiliary vein being separated from it; the basal cells perfectly developed.

‘Iwo genera only of this group are represented in the Mexican collections before me.

Abdomen cylindrical, in the male enlarged at the extremity, with the genitalia

usually prominent ; proboscis weak, with distinct terminal lips; legs elongate

Abdomen more oval, somewhat flattened, the male genitalia less conspicuous ;

proboscis horny, often pointed or with small terminal lips; legs robust, the

Both genera contain species with a plumose arista and others in which the

arista is bare or nearly so. For the Cordylure with a non-plumose arista Macquart

has established the genus Cleigastra, which has been adopted by Schiner for the

European species. Loew, on the contrary, who has described several North-

American forms, includes species with a bare, as well as others with a plumose arista,

under the one genus Cordylura.

The species of Scatophaga with a bare arista have been generically separated by

Robineau-Desvoidy under the name Scatina; in Schiner’s work they form merely a

subdivision of the genus Scatophaga.

CORDYLURA.

Cordylura, Fallén, Specim. entom. nov. Dipt. disponendi method. exhib. (1810).

Of this genus I have examined three Mexican species, all apparently undescribed.

CORDYLURA. 349

They are rufous in colour, thus differing from the majority of the European and

North-American forms, which are usually black or brown.

The three Mexican species may be distinguished as follows :—

1. Third antennal joint short, not longer than the second; scutellum with two

bristles. 2 ew we ee ee ee ee ee ee Sr evicornis.

Third antennal joint elongate, much longer than the second; scutellum with

four bristles 2... 1... ee ee ee ee

2. Thoracic dorsum rufo-testaceous (larger species) . . . . . . . «ss. rufina.

Thoracic dorsum brownish (smaller species). . . . 2. 1. 1 6 ee eee (BiCina.

1. Cordylura brevicornis, sp.n., ¢. (Tab. IX. fig. 1, head in profile, .)

Rufous; ocellar point, two lines on the thorax, incisions of the abdomen, and tips of the hind femora, black ;

. third antennal joint short; scutellum with two bristles.

Length 6°5 millim.

Head, including antenn, proboscis, and palpi, pale rufous; front as broad as the eyes, slightly enlarged

towards the vertex; ocellar point blackish; face somewhat whitish ; oral margin with a pair of vibrisse,

laterally with a short bristle. Eyes reniform. Antenne short; second joint slightly prominent, with

a bristle; third joint ovate, not longer than the second; arista black, distinctly plumose. Proboscis

short, with broad terminal lips; palpi bristly at the tip. Thoracic dorsum with two blackish lines,

laterally with some bristles ; a single sterno-pleural bristle *. Scutellum with two long bristles only at

the hind border. Abdomen slender, cylindrical, slightly enlarged towards the end, shining, rufous, the

base brownish, the segments with black incisions; fifth segment with a pair of scaly organs beneath;

hind margins of the segments laterally with some long and fine bristles. Legs slender, pale rufous ; tips

of the hind femora blackish ; tarsi brownish ; femora and tibize with a short pilosity and several bristles.

Halteres pale rufous. Wings greyish-hyaline, yellow along the costa; small cross-vein distinetly beyond

the end of the first vein and a little beyond the middle of the discal cell; third and fourth veins very

slightly curved and parallel; posterior cross-vein straight and perpendicular.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

A single male specimen.

This species seems to be closely allied to Cordylura lutea, Loew (Dipt. Amer. Sept.,

Cent. x. 75), of which the female only is known; the latter, however, has the third

antennal joint black and the thorax without stripes.

2. Cordylura rufina, sp.n., ¢. (Tab. IX. figg. 2, ¢; 2a, head in profile.)

? Scatophaga reses, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 34.

Rufous ; abdomen and legs densely haired ; middle and hind femora with black tips ; scutellum with four bristles.

Length 8 millim.

Head rounded ; front deep rufous, broader than the eyes, with parallel sides ; face and cheeks pale rufous ;

oral margin with a pair of vibrissee ; eyes rounded ; occiput blackish in the middle. Antenne rufous ;

second joint bristly; third joint four times as long as the second; arista brownish-rufous, distinctly

plumose. Proboscis and palpi pale rufous. Thorax, scutellum, and abdomen rufous; thoracic dorsum

testaceous, with indistinct stripes, laterally with some bristles ; a single sterno-pleural bristle. Scutellum

with four bristles—one on each side and two at the hind margin. Abdomen slender, cylindrical, densely

* Sterno-pleural bristles, one or more, are found on the triangular inferior part of the pleuree between the

fore and middle cox (see Osten Sacken, Essay on Comparative Cheetotaxy, in Trans. Ent. Soc. Lond. 1884).

390 DIPTERA.

clothed with yellowish hairs, but without bristles; the fourth and fifth segments sometimes brownish ;

at the underside of the fifth a pair of small projections. Legs slender, rufous; middle and hind femora

with black tips; the femora and tibiz have a yellow pilosity, the tibie several black bristles; tarsi

brownish, the pulvilli brown. Halteres pale rufous. Wings with a brownish-yellow tinge; small cross-

vein beyond the end of the first vein and beyond the middle of the discal cell; third and fourth veins

parallel ; posterior cross-vein straight and nearly perpendicular.

Hab. Mexico, Ciudad in Durango (Forrer), Omilteme 8000 feet, and Sierra de las

Aguas Escondidas 9500 feet, both in Guerrero (H. Z. Smith).

Several male specimens. It is possible that these may be referable to Scatophaga

reses, Gigl.-Tos, which has a cylindrical abdomen and slender legs, and is therefore

likely to be a Cordylura.

3. Cordylura vicina, sp.n., ¢ @.

Rufous ; occiput with a black spot; thoracic dorsum brownish ; abdomen and legs densely haired (in ¢);

abdominal segments with black incisions; tips of the middle and hind femora black; antenne elongate ;

scutellum with four bristles.

Length 4°5-5 millim.

Agrees in most of its characters with the preceding (C. rujina), but differs in its smaller size and in the

brown coloration of the thoracic dorsum. The black spot on the occiput is more conspicuous and trifid

towards the vertex. In the females the body and legs are less hairy, the tip of the abdomen is pointed,

and the black incisions on the segments are more distinct.

Hab. Mexico, Omilteme and Sierra de las Aguas Escondidas (H. H. Smith).

Several specimens, including three females.

This insect is perhaps a variety of C. rufina.

SCATOPHAGA.

Scatophaga, Meigen, Illig. Magaz. ii. p. 277 (1808).

A single species of this well-known genus is represented in the Mexican collections

before me. It agrees in coloration and structure with the Kuropean forms, but

cannot be identified from any of the published descriptions.

1. Scatophaga vittata, sp.n., ¢ 9.

Cinereous ; antenne, palpi, and legs rufous ; femora with a black stripe ; cross-veins slightly infuscated.

Length 6 millim.

Front broader than the eyes; frontal band testaceous or rufous, bifid behind ; face pale yellow ; oral margin

with a pair of vibrissee and some other bristles. Antenne rufous; third joint nearly three times as long

as the second; arista black, its proximal half thicker and short-haired. Proboscis shining black ; palpi

pale rufous, slender, the tip with black hairs. Thorax, scutellum, and abdomen cinereous; the thorax

with indistinct stripes and strong bristles; scutellum with four bristles ; metanotum grey. Abdomen

elliptical, densely clothed with yellowish hairs in the male. Legs rufous; fore and middle cox cine-

reous, hind coxe grey; all the femora on the upperside with a black stripe, which does not reach the

base nor the tip; femora and tibie with yellow hairs (¢), the tibie also with strong black bristles and

spurs. Halteres yellowish. Wings greyish-hyaline, yellowish at the base and along the costa; cross-

veins slightly infuscated ; small cross-vein beyond the end of the first vein and beyond the middle of the

discal cell; posterior cross-vein straight, slightly oblique. In the female the abdomen and legs are less

hairy.

SCATOPHAGA.—HELOMYZA. 351

Hab. Mexico, Mexico city (H. H. Smith).

This species is nearly allied to the European S. squalida, Meig., which occurs also

in North America (mentioned by Say under the name Pyropa furcata); it differs,

however, in having black stripes on the femora, which are usually wanting in

S. squalida, though sometimes slightly indicated on the front pair.

Two species of Scatophaga have been previously described from Mexico :—

Scatophaga reses, Gig].-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.)

p. 34. no. I.

cenosa, Gigl.-Tos, loc. cit. no. 2.

The first-mentioned, as I have already noted, may belong to the species described by

me (anted, p. 349) under the name of Cordylura rufina.

Group HELOMYZINZ.

The insects of this group are characterized by a rather broad front, of which only

the posterior half is set with bristles; distinct vibrisse; the antenne not elongate,

often short, with a rounded third joint; the abdomen elliptical, moderately broad.

In the wings, the auxiliary vein is separated from the first vein, and the inferior

basal cells are complete.

In the Central-American collections before me the genus Helomyza only is

represented.

HELOMYZA.

Helomyza, Fallén, Heteromyz. Suec. p. 3 (1820).

Of this genus I have distinguished four species, which all have blackish markings

on the wings.

1. Arista distinctly plumose ; wings with blackish borders to the costa

and to the veins, but no spots between the veins . . . 2.

Arista bare or short-haired ; two or more isolated spots between the

veins. . . 3.

2. A black stripe on . the fourth vein, forming with the black border of

the posterior cross-veina T-like mark. . ... . ... . %imiens, Gigl.-Tos.

The black border of the posterior cross-vein not extended on “the

fourth vein. . . . punctulata, v. d. Wulp.

3. Two spots only in the first posterior cell, in addition to ‘the blackish

markings . .. . . . . . distigma, v.d. Wulp.

Several spots in nearly all the cells, in addition to the blackish

markings . 2. 2. - 1 1 ee ee we we ew we + polystigma, v. d. Wulp.

352 DIPTERA.

1. Helomyza iniens. (Tab. IX. fig. 3, ¢.)

Helomyza iniens, Gig].-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 35, figg. 9,10°.

Hab. Mextco!, Amula 6000 feet, Omilteme 8000 feet, and Sierra de las Aguas

Escondidas 9500 feet, all in Guerrero (H. H. Smith).

A long series of specimens of both sexes. The complete and clear description of

Dr. Giglio-Tos leaves no doubt about the determination. He describes the wings as

“intensemente brune longo tutta la costa”; but, as represented in his figure, the

brown border of the costa is wanting at the base and interrupted again before the end

of the second vein. The T-like mark on the wings is very striking and gives a peculiar

aspect to this interesting fly.

The Guerrero specimens vary in length from 7-9 millim.; two of them (females)

measure no more than 5°5 millim.

2. Helomyza punctulata, sp.n. ¢ 9. (Tab. IX. fig. 4, wing.)

Testaceous ; head and legs rufous; front and face with black dots; wings blackish at the costa and tip.

Length 5 millim. ;

Front broader than the eyes, orange-rufous; face, cheeks, and occiput pale rufous; ocellar knob black; two

black dots near the vertex next the eyes and two smaller ones between the eyes and the root of the

antenne ; three similar points on the face—one in the middle and two on the sides of the oral margin,

these latter bearing the vibrisse ; the face with a narrow silvery-white lateral margin ; on the occiput is

a central black spot, on each side with a white border. Antenne rufous; third joint ovate ; arista black,

distinctly plumose. Proboscis pale rufous; palpi black, at least at the tip. Thorax and scutellum

reddish-testaceous ; thoracic dorsum with more or less distinct brown stripes ; a blackish band from the

shoulders to below the base of the wings; pleure and metanotum pale rufous; thorax laterally with

several bristles; scutellum with four bristles. Abdomen rufous, the segments with blackish hind-

borders and marginal bristles. Legs pale rufous, the tarsi towards the end and the tip of the hind

femora blackish ; femora and tibie with weak bristles. Halteres rufous. Wings with short spines along

the costa; from the end of the first vein the costa has a blackish border, which becomes broader outwards

and extends round the tip of the wing; the cross-veins are covered by blackish spots; venation as in the

preceding species.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

Several specimens of both sexes.

3. Helomyza distigma, sp.n., ¢ @. (Tab. IX. fig. 5, wing.)

Rufo-testaceous ; antennsz and legs rufous; two rounded spots in the first posterior cell, in addition to the

other blackish markings on the wings.

Length 5-7 millim.

Male. Head pale rufous; front much broader than the eyes; ocellar point shining brown, emitting two

bristles, which are curved forwards; exterior to these are two other bristles and on each side of the

vertex a pair of post-vertical bristles; face and cheeks broad; two weak vibrisse at the oral margin.

Antenne rufous, short; third joint rounded; arista black, nearly bare. Proboscis and palpi rufous.

Thorax and scutellum testaceous; thoracic dorsum. with numerous hair-points ; pleure with a brown

stripe from the shoulders to beneath the base of’ the wings ; the sides of the thorax with some bristles ;

scutellum with four bristles—one on each side and two at the hind margin; metanotum rufous. Abdomen

greyish-brown, the anal segment globular and more rufous; the segments with some marginal and

HELOMYZA. 300

lateral bristles. Legs rufous, tips of the tibiee and the last three joints of the tarsi blackish ; hind tibis

with an indistinct brown ring near the base; femora rather robust, hairy beneath, the first and third

pairs each with a row of bristles on the upperside; tibia with a preapical bristle. Halteres pale

rufous. Wings greyish, with a row of short costal bristles, and with a blackish costal border, covering

the mediastinal cell and from there extended to the tip of the wing, where it becomes narrower, to the

end of the fourth vein; the cross-veins bordered with black; a spot on the fourth vein beyond the

posterior cross-vein, a rounded dot between the second and third veins, just above the small cross-vein,

and two similar dots between the third and fourth veins. Small cross-vein a little beyond the end of the

first vein and beyond the middle of the discal cell; posterior cross-vein straight and slightly oblique.

Female. Differs from the male in having the abdomen pointed towards the apex, the arista shortly plumose,

and the legs more slender and less hairy ; the femora have a brown spot on the upperside near the tip,

and the tibia dark rings near the base; the markings of the wings are similar, only the blackish dot

between the second and third veins is wanting.

Hab. Mexico, Amula 6000 feet, Xucumanatlan 7000 feet, and Sierra de las Aguas

Escondidas 9500 feet, all in Guerrero (H. H. Smith).

A single male specimen from the last-mentioned locality, and a female from each of

the others.

Notwithstanding the differences between the two sexes, I have no doubt that they

belong to the same species.

4. Helomyza polystigma, sp.n., ¢. (Tab. IX. fig. 6, wing.)

Testaceous ; a blackish stripe on the pleure ; wings with a blackish border to the costa and to the cross-veins,

and numerous spots in all the cells.

Length 4°5 millim.

Allied to the preceding species (H. distigma), but smaller and differing from it in the markings of the

wings. Face, cheeks, and anterior portion of the front yellowish, with a white reflection ; front poste-

riorly rufous with some brown points; frontal bristles as in H. distigma; a black spot on each side

between the orbits and the root of the antenn#. Antenne rufous; third joint rounded, blackish on the

upperside ; arista with very short hairs. Proboscis rufous (the palpi inconspicuous in the specimens

examined). Thorax and scutellum brownish-testaceous, the shoulders yellowish, beneath them on the

partly cinereous pleure a blackish stripe ; scutellum with four bristles. Abdomen brown, the segments

with narrow black borders. Femora blackish; tibie rufous, with black tips; first joint of the tarsi

rufous, the following joints blackish ; tibiee with a preapical bristle. Halteres yellow. Wings greyish ;

a blackish border along the costa, round the tip, and on the cross-veins, and blackish spots of different

sizes in all the cells; the costa with a row of short bristles; small cross-vein nearly under the end of the

first vein and on the middle of the discal cell.

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 9500 feet (Hl. A. Smith).

Two female specimens.

Dr. Giglio-Tos in his work on Mexican Diptera (Mem. R. Accad. delle Scienze di

Torino, ser. 2, xlv.) also includes the following species among the Helomyzine :—

Diplocentra gibba, Fabr. Syst. Antl. p. 297. 70 (Musca); Wiedem. Aussereur.

zweifl. Ins. ii. p. 586. 1 (Helomyza); Macquart, Dipt. Exot. ii. 3, p. 198,

t. 25. fig. 9,10 (Curtonotum); Schiner, Dipt. Novara Reise, p. 237. 18

(Curtonotum) ; Gigl.-Tos, loc. cit. (sep.) p. 36. no. 4.

BIOL. CENTR.-AMER., Dipt., Vol. II., September 1897. 22

304 DIPTERA.

Diplocentra simplex, Schiner, Dipt. Novara Reise, p. 237. 19 (Curtonotum) ;

Gig].-Tos, loc. cit. (sep.) p. 36. no. 9.

Tauromyia pachyneura, Gigl.-Tos, loc. cit. (sep.) p. 37. no. 6, tab. figg. 7, 8.

The genus Diplocentra, though formerly regarded as belonging to the Helomyzine,

is much better placed in the group Geomyzine (see Osten Sacken, Berl. ent. Zeitschr.

xxvi. p. 243).

As regards Zauromyia, Gigl.-Tos, the figure which the author has given of the

wing shows evidently that the genus is likewise misplaced among the Helomyzine.

The two inferior basal cells are almost rudimentary, a form of neuration quite foreign

to this group. I presume that Tauromyia would be more naturally placed among’ the

Geomyzine or some allied group.

Group SCIOMYZIN A.

In the broad front, with bristles on the posterior half only, and in the neuration of

the wings, the Sciomyzine agree with the Helomyzine, but they differ from them in

the absence of vibrisse. The face is somewhat retracted, without antennal furrows,

and with the oral margin sharp; the antenne are rather long and projecting in some

of the species; the legs are of moderate length (in Sepedon the hind femora are

elongate) ; the tibiee have a preapical bristle, the middle pair with distinct spurs.

I follow Loew (Monogr. of the Diptera of N. America, i. pp. 37, 103) in uniting

the Tetanocerine with this group, these having been separated by Schiner (Fauna

Austr., Dipt. ii.).

Three genera are represented in the Mexican collections before me :—

1. Antenne rather short, the third joint oval or circular, much longer than

the second. . .. . . oe ~ . . + « Sciomyza.

Antenne more or less prolonged, the second and third joints equally

long, or the third shorter, this latter never circular . . . . . . 2.

2. Front not excavated; eyes not prominent . . . . . . . . . . Yetanocera.

SCIOMYZA.

Sciomyza, Fallén, Sciomyz. Suec. p. 11 (1820).

Of this genus I have to record five species from Mexico; one of them is identical

with a European form and the others are new.

1. Wings with dark markings. . . . . woe ee ee

Wings without dark markings a 8. squalens the cross-veins are

slightly infuscated) . . wee |

2. Arista plumose; tips of the wings . broadly bordered with brown . infuscata, vy. d. Wulp.

SCIOMYZA. 355

Arista bare ; wings with blackish transverse stripes between the

veins. . ww ee ee ee ee ee ee

3. Stripes in the first posterior cellonly . . . 2... 2... nana, Fall.

Stripes in the first posterior cell, and also in the submarginal and

discal cells . . . . oe soe . . . . + strigata, v. d. Wulp.

4. Cross-veins slightly infuscated ; front without polished stripes . . squalens, v.d. Wulp.

Cross-veins not infuscated ; front with three polished stripes . . serena, v.d. Wulp.

1. Sciomyza infuscata, sp. n.,¢. (Tab. IX. figg. 7,2 ; 7a, head in profile.)

Cinereous, abdomen black; legs rufous, the fore and middle femora blackish; tip of the wings broadly

bordered with brown; arista plumose.

Length 4 millim.

Front cinereous; frontal bristles long and robust, in three pairs; two shorter postvertical bristles and two

very minute ocellar bristles ; a small black spot on each side between the antenne and the orbits; face

and cheeks grey. Antenne black ; the second joint and the base of the third rufous; arista distinctly

plumose. Proboscis rufous; palpi, at least at the tip, black. Thoracic dorsum and scutellum uniformly

greyish-cinereous ; a large brown or blackish lateral band starts from the shoulders and is, though much

more narrowly, prolonged on each side of the scutellum; a second lateral band, grey in colour, extends

from the shoulders to the base of the wings; pleure rufous, above the middle coxe slightly greyish ;

metanotum rufous; scutellum with four bristles. Abdomen flattened, shining black. Legs rufous ;

upperside of the fore femora, save at the tip, black; middle femora with a blackish stripe. Halteres

rufous. Wings grey; the costa, from the end of the first vein, and the tip, to beneath the fourth vein,

largely bordered with dark brown; the fifth vein and the posterior cross-vein clouded with brown ;

small cross-vein a little beyond the end of the first vein and beyond the middle of the discal cell; posterior

cross-vein straight, separated from the margin of the wing by more than twice the distance that it is from

the small cross-vein.

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 7000 feet (H. H. Smith).

A single female specimen.

2. Sciomyza nana. (Tab. IX. fig. 8, wing.)

Sciomyza nana, Fall. Sciomyz. Suec. p. 15. 12*; Meig. Syst. Beschr. vi. p. 18.197; Macq. Hist.

Nat. Ins., Dipt. ii. p. 408. 14°; Zett. Dipt. Scandin. v. p. 2109. 18*; Schiner, Faun. Austr.,

Dipt. ii. p. 49°; Loew, Monogr. Dipt. N. Am. i. p. 104. 1°.

Hab. Nortu America °.—MeExtico, Mexico city (H. H. Smith).—Evurops!~®.

A single female specimen of this very recognizable species has been received from

Mexico. I give a figure of the wing for comparison with that of the following species.

™

3. Sciomyza strigata, sp.n., 6 2. (Tab. IX. fig. 9, wing.) ~ [epee ter ae

Cinereous ; wings with blackish transverse stripes between nearly all the veins; arista bare.

Length 2°5-3 millim.

Front rufous; ocellar triangle and two lateral stripes slightly grey ; the bristles arising from black points;

face and cheeks whitish; a black point on each side between the root of the antenne and the orbits.

Antenne brownish ; arista bare. Proboscis and palpi rufous. Thorax and scutellum cinereous ; thoracic

dorsum with four brownish lines, the two inner ones approximated and prolonged on to the scutellum,

the outer lines less conspicuous; a brown lateral stripe extends from the shoulders to the base of the

wings; pleure grey; the front coxe yellowish, the middle and hind coxe cinereous ; scutellum with four

222

356 DIPTERA.

bristles. Abdomen obscure cinereous ; hind borders of the segments whitish. Front legs black, with

the knees rufous; middle and hind legs rufous, with the tips of the femora and tibie, and the terminal

joints of the tarsi, black (in the male specimen the middle and hind legs are brownish). Halteres yellow.

Wings slightly greyish ; the costal border, from the tip of the first to the end of the second vein, brownish,

but not so dark as in S. nana; the cross-veins are clouded with blackish, and there are blackish spots,

mostly in the shape of transverse stripes, between the veins—five or six in the submarginal cell, three in

the first posterior cell, and three in the discal cell; a small stump of a vein, likewise clouded, on the

terminal section of the fourth vein ; small cross-vein under the end of the first vein and on the middle of

the discal cell ; posterior cross-vein slightly convex.

Hab. Mexico, Vera Cruz and Mexico city (H. H. Smith).

One male and two female specimens. This species is closely allied to S. nana,

but distinguished from it by the different markings of the wings.

4, Sciomyza squalens, sp.n., ¢ 2. (Tab. IX. fig. 10, head in profile.)

Cinereous; front borders of the abdominal segments blackish; front, antenne, and legs rufous; cross-veins

infuscated ; arista nearly bare.

Length 4-5-5 millim.

Front rufous; a brown spot between the antenne and the orbits; face and cheeks white or yellowish.

Antenne brownish-rufous ; arista black, with very minute hairs. Proboscis and palpi rufous. Thorax,

scutellum, and abdomen cinereous; thoracic dorsum with more or less distinct. brown lines; pleure

clearer, sometimes with a slight rufous tinge ; no dark stripe between the shoulders and the base of the

wings; fore coxe yellowish, middle and hind coxe grey; scutellum with four bristles. Front borders of

the abdominal segments blackish or with three blackish spots; anal segment and genitalia of the male

brownish-rufous. Legs rufous; the first pair usually with the femora (except the base and tip) and the

tibia obscure; hind femora with a black spot before the tip; tips of the middle and hind tibie, and the

terminal joints of the tarsi, blackish ; basal joint of the front tarsi whitish. Halteres pale yellow. Wings

greyish-hyaline ; small cross-vein under the end of the first vein and on the middle or a little beyond

the middle of the discal cell; posterior cross-vein straight, somewhat perpendicular; both cross-veins

infuscated.

Hab. Mexico, Mexico city (H. H. Smith).

Seven males and three females.

5. Sciomyza serena, sp.n., ¢ 2.

Cinereous ; front rufous, with three polished stripes; antennz and legs brownish ; cross-veins not infuscated ;

arista bare. —

Length 4—4°5 millim.

Front rufous, with three polished stripes, the intermediate one brown; face and cheeks whitish. The two basal

joints of the antenne and the base of the third joint also rufous, the greater part of the latter blackish-

brown ; arista black, bare. Proboscis rufous; palpi yellow. Thorax, scutellum, and abdomen cinereous ;

thoracic dorsum with indistinct brown lines, the pleure clearer; front coxe yellowish-rufous; scutellum

with four bristles; front borders of the abdominal segments somewhat obscure. Legs uniform brownish-

rufous, the tibie and tarsi of the front pair sometimes black. Halteres yellowish. Wings greyish-

hyaline, iridescent; the cross-veins neither thickened nor infuscated ; small cross-vein under the end of

the first vein and on the middle of the discal cell; posterior cross-vein perpendicular and straight.

ITab. Mexico, Vera Cruz and Mexico city (H. H. Smith).

Two males and one female.

TETANOCERA.

“I

TETANOCERA.

Tetanocera, Latreille, Gen. Crust. et Ins. iv. p. 850 (1809).

In the Mexican collections under examination there are five species belonging to

this genus :—

Wings not reticulated . 2. 2. 1 ee ee ee we ew

2. Reticulation of the wings sparse, forming transverse stripes between

the veins . woe es . foe ee ew we ee) Straminata, v. d. Wulp.

Reticulation of the wings very close, showing transparent dots in

the brown ground-colour . . rs P

3. Tip of the antenne blunt ; front with black spots a black central -

point on the face . . . . ee oe es) . 6pictipes, Loew.

Tip of the antennz pointed ; front with a brown median stripe; no

black point on the face . acuticornis, v. d. Wulp.

_ 4, Arista with long erect hairs ; posterior cross-vein distinetly bi-

arcuated. . 2... . Loe ee ew ee. Spreta, v. d. Wulp.

Arista with close plumosity of moderate length; posterior cross-

vein slightly biarcuated. 2 2. 1 ee ee ee ee - plumifera, v. d. Wulp.

1. Tetanocera straminata, sp.n,3¢ 9. (Tab. 1X. figg. 11,3; 11a, head in

profile.)

Testaceous; head rufous, with black dots; arista black-haired; wings with a sparse reticulation, forming

spots and transverse stripes between the veins.

Length 6°5 millim.

Face shining ochraceous, with silvery-white reflections ; front orange-yellow, with several black dots—-one on

the ocellar knob, another immediately behind the insertion of the antenne, one on each side next the -

antenn, and some smaller ones at the orbits; these black dots mostly bordered with silvery-white. On

the occiput a black median band, laterally bordered with white. Antenne orange-yellow ; first joint

short ; the second longer, with black hairs on the upperside; the third as long as the second, slightly

excised above; arista black, with a dense black plumosity. Proboscis rufous; palpi yellow. Thorax,

scutellum, and abdomen testaceous ; thoracic dorsum cinereous, with four indistinct brown lines; meta-

notum grey. Legs rufous; tips of the femora and tibie black; tarsi brown, black towards the tip.

Halteres yellow. Wings tawny; mediastinal cell black; a brown border goes from it along the costa

and round the tip; the rest of the surface has a dispersed brownish reticulation, forming transverse stripes

between the veins ; cross-veins slightly infuscated ; small cross-vein under the end of the first vein and

on the middle of the discal cell; posterior cross-vein convex.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

Three males and one female.

2. Tetanocera pictipes. (Tab. IX. figg. 12, wing; 124, head in profile.)

Tetanocera pictipes, Loew, Wien. ent. Monatschr. iii. p. 292°; Monogr. Dipt. of N. Amer. i. p. 111’.

Brownish-cinereous; face whitish, with a black central point; antenne rufous, third joint blunt; femora

spotted; wings with a very close reticulation, showing transparent dots.

Length 5-6°5 millim.

308 DIPTERA.

Hab. Norra America! ?.—Mexico, Northern Sonora (Morrison), Patacuaro (F. D.G.),

Amula in Guerrero, Cuernavaca in Morelos, and Vera Cruz (H. H. Smith).

Several specimens of both sexes. The Mexican specimens agree perfectly with the

ample descriptions given by Loew, to which I may refer for further details. It is

possible that 7. pictipes is identical with the European Tetanocera umbrarum, L. (see

Loew, loc. cit.).

3. Tetanocera acuticornis, sp. n.,3. (Tab. IX. fig. 18, head in profile.)

Brownish-cinereous ; antenne rufous, third joint pointed; face white; femora spotted; wings with a very

close reticulation, showing transparent dots.

Length 4~5°5 millim.

Allied to the preceding (T. pictipes), but generally smaller in size. Front yellowish-cinereous, opaque, with a

brown longitudinal median stripe; the frontal bristles arising from black dots, which, however, are much

smaller than in J. pictipes; a small brownish spot on each side between the orbits and the root of the

antenne. Face white, without the black central point (which in all the specimens of 7. pictipes is

present); on each side of the cheeks, beneath the eyes, a brown streak. Antenne rufous; second joint

bristly ; third joint as long as the second, excised on the upperside and ending in a sharp point; arista

black, with a scanty, rather long pilosity. Proboscis brown; palpi pale rufous. Thorax, scutellum, and

abdomen brownish-cinereous, covered with small blackish dots; scutellum with four bristles; abdominal

segments with more or less conspicuous blackish spots, the middle ones of which form a dorsal stripe.

Legs dark rufous; femora with two black spots near the tip; tibie with black tips; tarsi brown, the

two or three terminal joints black, the basal joint of the front pair pale. Halteres yellowish. Wings

brownish, more obscure along the costa, grey towards the hind border, and with numerous transparent

dots, which are more regularly placed along the veins; small cross-vein a little beyond the end of the first

vein and on the middle of the discal cell; posterior cross-vein slightly convex.

Hab. Mexico, Northern Sonora (Morrison).

Several male specimens.

4. Tetanocera spreta, sp.n.,¢ °.

Brownish-testaceous ; front, antenne, and legs rufous; arista scantily plumose; wings cinereous, a blackish

cloud at the end of the second vein; cross-veins infuscated ; posterior cross-vein distinctly biarcuated.

Length 6°5—7°5 millim.

Front orange-rufous, opaque, with a brown, somewhat shining, median stripe; a brown dot on each side

between the eyes and the root of the antenne ; face and cheeks pale yellow, the cheeks with short hairs ;

on the occiput a black median spot, laterally bordered with white. Antenne rufous; second joint with

black hairs on the upper and under sides; third joint coniform, as long as the second ; arista black, with

a scanty but long plumosity. Proboscis rufous; palpi yellow. Thoracic dorsum brownish-testaceous,

with four brown stripes; pleure greyish-yellow; a brown stripe from the shoulders to beneath the base

of the wings; scutellum rufous, with four bristles. Abdomen brown, with the incisions clearer. Legs

rufous, front tibie and hind femora usually with black tips; tarsi brown, the terminal joints black.

Halteres yellow. Wings brownish-cinereous; a blackish cloud at the end of the second vein; cross-veins

bordered with brown; small cross-vein beyond the end of the first vein and on the middle of the discal

cell; posterior cross-vein very oblique and arcuated in the form of an S.

Hab. Mexico, Jalisco (Schumann), Mexico city (H. H. Smith).

Three male and two female specimens. In the S-like arcuation of the posterior

cross-vein this species agrees with the European representatives of the genus Elgiva,

Meig., but it differs from them in the plumose arista.

TETANOCERA.—SEPEDON. 309

5. Tetanocera plumifera, sp. n., 3.

Testaceous; front, antenn, and legs rufous; arista densely plumose; wings cinereous; costa and cross-Vvelns

bordered with brown; posterior cross-vein undulate.

Length 5°25 millim.

Closely allied to the preceding species (7. spreta), and agreeing with it in most respects. The median stripe

on the front is more shining; the plumosity of the arista is shorter, but more dense; the colour of the

body is generally clearer, and the stripes on the thorax are less distinct. The wings have a brown border

along the costa, from the mediastinal cell to a little beyond the end of the second vein ; the posterior

eross-vein is only slightly undulate.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer).

A single male specimen.

SEPEDON.

Sepedon, Latreille, Hist. nat. des Ins. xiv. p. 305 (1804).

Our Mexican collections include three species of this genus, all of which are described

as new :—

1. Second joint of the antenne as broad as the third. . . . . . . . . « ~~ relictus.

Second antennal joint narrower and much longer than the third . . . . . . 2.

2. Hind femora with a black ring before the tip; wings without markings. . . . migriventris.

Hind femora without black ring; wings clouded towards the tip . . . . . . nubilipennis.

1. Sepedon relictus, sp. n.,¢.

Testaceous ; second joint of the antenne as long and nearly as broad as the third.

Length 5 millim.

Front rufous, as broad as the eyes, in the middle deeply excavated; face pale yellow, shining, and with white

reflections; a black dot on each side next the orbits, beneath the antenne. Antenne as long as the

head, rufous, at the base separated by a small protuberance of the front; first joint short; second joint

elongate and rather broad, with black hairs on the upper and under sides; third joint as long as the

second, lanceolate, blackish at the tip; arista bare, whitish, the base slightly thicker and rufous.

Proboscis and palpi rufous. Thorax, scutellum, and abdomen reddish-testaceous; thoracic dorsum with

six brown lines, laterally with a brown stripe extending from the shoulders to the base of the wings ;

pleurz cinereous, with small brown spots; abdomen flattened, with a brown dorsal band. Legs rufous,

coxse cinereous ; tibise with a black tip, which is less conspicuous on the middle pair; hind tibie also

with a blackish median ring; hind femora robust, longer than the abdomen, and with a row of short

black spines beneath ; hind tibia slightly arcuated. MHalteres rufous. Wings brownish-yellow, near the

tip with some oblong clouds between the veins; cross-veins infuscated; small cross-vein on the middle

of the discal cell ; posterior cross-vein curved.

Hab. Mexico, Mexico city (7. H. Smith). |

A single male specimen.

2. Sepedon nigriventris, sp. n.,¢.

Thorax cinereous; abdomen black; head and legs rufous; hind femora with a black ring; second antennal

joint narrower and much longer than the third.

~ Length 5°5 millim.

Head shining, rufous; front in the middle deeply excavated ; two black dots beneath the antenne, at some

distance from the orbits; oral margin sharply projecting ; occiput swollen. Antenne longer than the

360 DIPTERA.

head, brown, separated at their base by a protuberance of the front; first joint rufous, short; second

joint very slender and elongate, cylindrical, slightly enlarged towards the tip, with black hairs on the

upper and under sides; third joint one-half the length of the second, pointed towards the tip; arista

bare, the basal half blackish, for the rest white. Proboscis brown ; palpi pale rufous, slender. Thoracic

dorsum cinereous, with two brown lines; pleure grey ; scutellum obscure cinereous. Abdomen shining,

bluish-black. Legs, including the fore coxe, rufous; middle and hind cox grey; femora with black

tips; hind femora robust, much longer than the abdomen, with a black ring behind the middle, and with

a row of short spines beneath; middle femora also with similar, but very minute, spines; tibiee with

black tips; tarsi brownish-black. Halteres rufous. Wings greyish-hyaline, yellowish along the costa ;

emall cross-vein a little before the middle of the discal cell ; posterior cross-vein slightly curved.

Hab. Mexico, Vera Cruz (H. H. Smith).

Two female specimens.

3. Sepedon nubilipennis, sp.n. 3 ¢. (Tab. IX. figg. 14,3 ; 14a, head in

profile.)

Rufous; head with black and white dots; second antennal joint longer and narrower than the third; wings

clouded towards the tip.

Length 5-6°5 millim.

Front rufous, somewhat excavated in the middle and with a brown median band ; ocellar point and two rounded

spots near the orbits black ; face and cheeks pale rufous, shining, with some silvery-white spots, the face

concave ; oral margin sharply projecting ; a black central point and two black dots beneath the antenna, at

a short distance from the orbits. Antenne rufous, longer than the head ; second joint slender, cylindrical,

short-haired on the upper and under sides ; third joint shorter than the second, its basal part thicker, the tip

blackish; arista white, with a white pubescence. Proboscis and palpi rufous. Thorax, scutellum, and

abdomen brownish-rufous ; thoracic dorsum and pleurs: with numerous fine brown points; abdomen with

a brown, interrupted dorsal band. ‘Legs rufous; tips of the femora and tibie black; tarsi brown, the

terminal joints black; hind femora slightly thicker than the others, in the male a little longer, in the

female shorter than the abdomen, at the underside towards the end with some short bristles, Halteres

- pale rufous. Wings greyish-hyaline, yellowish at the base ; mediastinal cell and a border along the costa

prownish-grey; this latter colour largely and irregularly extended round the tip, leaving several more

transparent spots; small cross-vein on the middle or a little beyond the middle of the discal cell; posterior

cross-vein slightly curved or nearly straight.

Hab. Mexico, Presidio de Mazatlan (Forrer), Atoyac in Vera Cruz (1. H. Smith).

A male specimen from Atoyac, and a female from Presidio.

Of the group Sciomyzine, the following species have also been described from

Mexico :— _

Dryomyza maculiceps, Walk. Trans. Ent. Soc. Lond. new series, v. p. 319.

Tetanocera pectoralis, Walk. loc. cit. p. 321.

Sepedon premiosus, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep. )

p. 38.

Group PSILINZ.

Elongate flies, without bristles, except some short and weak ones on the vertex and

on the scutellum; vibrisse absent. Antenne incumbent, sometimes (gen. Loxocera)

with a very long terminal joint. Tibie without a preapical bristle; the middle pair

PSILA.—CHYLIZA. 361

with spurs. Auxiliary vein at first united with the first vein, but separated from it

towards the end, and indistinctly running to the costal vein, which is often interrupted

at that place; the inferior two basal cells are rather large.

The Central-American collections contain representatives of two genera, each with a

single species.

Face receding ; third basal cell as long as the second . . . . . . . . . ).) ) Posila.

Face nearly perpendicular; third basal cell shorter than the second . . . . . . . Chyliza.

PSILA.

Psila, Meigen, Illig. Magaz. il. p. 278 (1803).

1. Psila exigua, sp. n., ¢.

Shining black; head, antenne, and legs yellow; wings hyaline.

Length 3 millim.

Head yellowish-rufous, shining ; ocellar knob and a double spot on the occiput brown; the minute bristles on

the vertex yellow. Antenne, including the arista, proboscis, and palpi yellow. Thorax, scutellum, and

abdomen shining black; thoracic dorsum with a short, white pilosity. Legs yellow. Halteres whitish.

Wings much longer than the abdomen, hyaline, with yellow veins ; small cross-vein before the end of the

first vein and nearly on the basal quarter of the discal cell ; posterior cross-vein straight, perpendicular, and

near the hind border.

Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (7. H. Smith).

A single male specimen.

CHYLIZA.

Chyliza, Fallén, Opomyz. Suec. p. 6 (1820).

1. Chyliza varipes, sp. n., 3 °.

Shining black ; head, scutellum, and legs rufous, the legs with blackish marks ; tips of the wings infuscated.

Length 5°5 millim.

Head rufous; front much broader than the eyes; ocellar knob, two stripes at the orbits, and two dots on the

face, black. Antenne yellowish-rufous; arista yellow. Prvboscis pale rufous; palpi black at the tip.

Thorax shining black, with more or less distinct yellow stripes; in some specimens the yellow colour

predominates, and only a narrow margin and a broad band from above the shoulders over the pleure are

black; scutellum yellowish-rufous. Abdomen shining black, the pointed ovipositor of the female rufous.

Legs yellowish-rufous ; tips of the fore femora, a ring near the apex of the hind femora, and the inner side

of the fore and hind tibic, blackish-brown, this colour more or less extended in some specimens, the darkest

having the middle femora and tibie also blackish at the tip. Halteres yellow. Wings greyish-yellow,

infuscated round the tip, most obscure at the end of the second vein; a slight shadow at the base of the

first posterior cell; veins black; small cross-vein under the end of the first vein and on the basal third

of the discal cell; posterior cross-vein straight and perpendicular.

Hab. Mexico, Venta de Zopilote 2800 feet, Chilpancingo 4600 feet, and Amula

6000 feet, all in Guerrero, and Teapa in Tabasco (H. H. Smith).

Two male and four female specimens.

BIOL. CENTR.-AMER., Dipt., Vol. II., Wovember 1897. 3a

362 DIPTERA.

The following species of Psiline have also been recorded from Mexico :—

Chyliza apicalis, Loew, Dipt. Amer. Sept., Cent. viii. no.72; Gigl.-Tos, Mem. R.

Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 64. no. 70.

enthea, Gigl.-Tos, loc. cit. p. 64. no. 71.

Megamerina fulvida, Bigot, Ann, Soc. Ent, Fr. 1886, p. 384.

The genus Megamerina, Rond., is identical with Lissa, Meig., which belongs to the

Psiline.

Group TANYPEZIN &.

Head hemispherical, the occiput being flattened ; front rather narrow, especially in the male, with bristles

on the posterior half only; vibrisse absent. Abdomen slender, cylindrical (3) or elliptical (2);

ovipositor exserted and pointed. Legs elongate; tibie without a preapical bristle ; tarsi longer than the

tibie. First vein double, the auxiliary vein being distinct ; third and fourth veins convergent towards

the tip ; the two inferior basal cells small.

This group contains the single genus Tanypeza, Fall., which is placed by Macquart

and Schiner in the Calobatine, but which differs so much from the other members of

that section that its separation appears to be fully justified.

TANYPEZA.

Tanypeza, Fallén, Opomyz. Suec. p. 4 (1820).

Two species are represented in the Central-American collections :—

Shining black ; legs yellow, with brownish portions; palpi black . . . . claripennis, Schin.

Rufous; tarsi black, the front pair with the basal half of the first joint

1. Tanypeza claripennis.

Tanypeza claripennis, Schiner, Dipt. Novara Reise, p. 247. 46°.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman), Xucumanatlan and Omilteme,

both in Guerrero, Cuernavaca in Morelos, Teapa in Tabasco (H. H. Smith) ; Costa

Rica, Volcan de Irazu 6000 to 7000 feet (ogers).—Braziu?}.

A series of specimens of both sexes. They agree perfectly with Schiner’s description.

The abdomen of the male is clothed with long hairs laterally and on the underside ;

these hairs are mostly black or brown, sometimes clearer; the hypopygium is black,

with a silvery-white dust on the upperside; the brownish markings of the legs are

not always distinct ; the hind tibiz have the extreme apex and a ring before it yellow;

the hind border of the very minute tegule is densely beset with yellow hairs.

2. Tanypeza rutila, sp.n.,3¢ 9. (Tab. IX. fig. 15, ¢.)

Rufous ; front black, with silvery-white spots; tarsi black, the front pair with the proximal half of the first

joint whitish.

Length 7 millim.

TANYPEZA. 363

Closely allied to the preceding species (7. claripennis), but differing from it in the rufous coloration of the

body. Front deep black; a spot behind the ocelli and two triangular spots above the antenna silvery-

white; in the male the front is a little broader than in the corresponding sex of 7. claripennis. Face

and cheeks pale rufous, the cheeks and posterior orbits with silvery-white reflections. Antenne,

proboscis, and palpi rufous. Thorax, scutellum, and abdomen rufous, somewhat shining ; on the pleure

a white oblique band extends from the shoulders to the middle coxe; second abdominal segment with

bristly hairs at the sides. Legs very slender, rufous; middle and hind tibiw (save a ring beneath the

middle) and the tip of the front femora brown; the fore legs with the tibia and the basal half of the

first tarsal joint white and the rest of the tarsi black; middle and hind tarsi wholly black; hind tibie

slightly curved near the base; hind tarsi with a small projection at the base (also present in T. claripennis

and other species). Halteres pale rufous. Wings hyaline, with a slight yellowish tinge.

Hab. Mexico, Sierra de las Aguas Escondidas 7000 feet, and Omilteme 8000 feet,

both in Guerrero (H. H. Smith).

One male and two female specimens.

Three other Mexican species of Tanypeza have been previously described :—

Tanypeza pallidipennis, Bigot *, Ann. Soc. Ent. Fr. 1886, p. 380. no. 8.

ornatipes, Bigot, loc. cit. no. 9.

mexicana, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.)

p- 61.

T. pallidipennis is probably nothing more than a small specimen of I. claripennis,

Schin., and 7. mexicana may be identical with 7. ornatipes, Big.

The genus Tetradiscus, Big., based upon a Mexican species, 7. notatus, Big. (Ann.

Soc. Ent. Fr. 1886, p. 374), most likely belongs also to the Tanypezine.

Group CALOBATINZ.

Flies of moderate or small size and of slender form. Head rounded or elongate,

more or less broad; front with only some weak and short bristles; vibrisse absent.

Abdomen of the female prolonged into a cylindrical tube, which is curved down to

the venter. Legs rather long, but with the tarsi shorter than the tibie; tibie without

a preapical bristle. Third and fourth veins convergent towards the tip of the wing;

inferior basal cells of different sizes, the third sometimes prolonged into a point.

The following genera are represented in the Mexican collections under examination :—

1. Arista apical or subapical . . 2. 1 ee ee ee ee wee ~Nerius.

Arista dorsal a ~ 2.

2. Second basal cell not closed by a cross-vein and united with the discal cell . Micropeza. °

8. Auxiliary and first veins always distinct; femorasimple . . . . . . . Calobata.

Auxiliary and first veins very short, pressed against the costa, and less con-

spicuous ; intermediate and hind femora swollen in the middle . . . Cardiacephala.

* Bigot gives the generic name as Twniaptera, but evidently in mistake for Tanypeza, as may be deduced

from his descriptions.

3 a2

364 DIPTERA.

NERILUS.

Nerius, Fabricius, Syst. Antl. p. 264 (1805).

Two species of this genus are known to me from Mexico :—

Antenne black; legs dark brown. . 7 we ee ee ee ee ee pilifer, Fabr.

1. Nerius pilifer.

Nerius pilifer, Faby. Syst. Antl. p. 264.11; Wiedem. Aussereur. zweifl. Ins. i. p. 550. 4°; Schiner,

Dipt. Novara Reise, p. 247. 47°.

Hab. Mexico, Teapa in Tabasco (H. H. Smith)—Sourn America }~*.

Three specimens (2 ¢, 1 2).

2. Nerius flavifrons. (Tab. IX. figg. 16, ¢ ; 16a, head in profile.)

Nerius flavifrons, Bigot, Ann. Soc. Ent. Fr. 1886, p. 372 ¢.

Hab. Mexico !, Teapa in Tabasco (H. H. Smith), Northern Yucatan (Gaumer).

Three specimens (1 3, 2 2), agreeing with Bigot’s description. The brownish

rings on the femora are scarcely visible; in the male the abdomen has a reddish dorsal

band. The length, measured from the root of the antenne to the end of the abdomen,

exclusive of the genitalia, is 65 millim. (Bigot gives 9 millim.).

. MICROPEZA

Micropeza, Meigen, Lllig. Magaz. 11. p. 276 (1803).

Of this genus I examined six Mexican species. With one exception (IM. nigricornis),

they all have the first posterior cell closed and more or less petiolated at the tip of the

wing.

1. Legs uniformly rufous. . 2. 2. 2. 1 1 we ee ee ee

Legs rufous, the femora with dark rings. . . . 3.

2. Occiput shining black in the middle, yellow at the sides; thorax .

blackish. 2 2. 2. ee ee ee ee ee ee ee eipitalis, v. A. Walp.

Occiput and thorax rufous . . . . . 1... ee ee ee rtficeps, v. d. Wulp.

3. Thorax blackish, without stripes. . . . . . . . . . . . + obscura, Big.

Thorax with longitudinal stripes. . 2... 2. 2. ee ee |

4. Antenne black: small species (length 4 millim.) . . . . . . . migricornis, v. d. Wulp.

Antenne rufous: larger species (length 5-7 millim.). . . . . . 5.

5. Thoracic dorsum with two median stripes and some markings on each

side; pleure not spotted . . . . . . Joe ee ee Bilineata, v. d. Wulp.

Thoracic dorsum with three median lines ; pleuree with numerous

smalldots. 2... 0. ee ee ee ew ee ee ew ee Stigmatica, v. d. Wulp.

MICROPEZA. 369

1. Micropeza occipitalis, sp. n.,¢.

Black ; antenne, pleurs, and legs yellowish-rufous ; occiput black in the middle and yellow at the sides.

Length 6 millim.*

Front a little narrower than the eyes, shining black; before the antennz are two large yellow spots, which

are separated by a black line; occiput largely developed, somewhat quadrangular, shining black, laterally

with a broad yellow border; face and cheeks narrow, yellowish-rufous, with white reflections. Antenne

rufous; third joint rounded; arista pale. Thorax blackish-brown; prothorax shining black ; pleurve

yellowish-rufous, with a triangular brownish band behind the fore coxie; scutellum testaceous. Abdomen

black, with yellow incisions ; ovipositor shining black, rufous beneath. Legs yellowish-rufous; tips of

the femora slightly infuscated ; front tibise (except the base), tips of the middle and hind tibiae, and all

the tarsi, black. Halteres yellow, the knob brownish. Wings hyaline; first posterior cell closed and

shortly petiolated.

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 7000 feet (Hl. H. Smith).

A single female specimen. This insect may prove to be identical with Calobata

pectoralis, Wiedem. (Aussereur. zweifl. Ins. 1. p. 540), which is also from Mexico,

and, according to Loew, belongs to the genus Micropeza.

2. Micropeza ruficeps, sp. n.,?.

Head, antenne, thorax, and legs rufous; abdomen black, with the incisions and underside yellow.

Length 7 millim.

Face yellowish-rufous, its lateral borders with silvery-white reflections; front and occiput chestnut-brown,

the front narrower than the eyes, black before the root of the antennw; on each side of the occiput,

beneath the eyes, is a horizontal yellow band. Antenne rufous; third joint rounded; the hair-like

arista pale. Thoracic dorsum brownish-testaceous, auteriorly more rufous, with two indistinct stripes ;

pleure grey; scutellum brown. Abdomen brownish-black ; hind margins of the segments and the whole

underside pale yellow ; ovipositor long, the proximal half rufous, towards the tip attenuated and shining

black. Legs rufous; front coxve whitish-yellow ; tibiee blackish towards the tip; tarsi black. Halteres

yellow, the knob black at the tip. Wings hyaline, with a slight yellow tinge; first posterior cell closed

at the border of the wing.

Hab. Mexico, Northern Sonora (Worrison).

A single female specimen.

3. Micropeza obscura.

Micropeza obscura, Bigot, Ann. Soc. Ent. Fr. 1886, p. 387 !.

This species is recognizable by its uniform black colour, with some greyish reflections ; in the pleura the grey

colour predominates ; the lateral borders of the narrow face are silvery-white; the head is shorter than

in most of the other species of the genus, the occiput being less prominent than usual behind the eyes ;

in the males the head has on the underside a fringe of black hairs, which is absent in the females. The

thoracic dorsum shows no stripes; the abdominal segments have narrow grey hind-borders ;_ the

hypopygium of the male and the ovipositor of the female are shining biack; in one or two of the male

specimens some yellow projections are visible. The antenne and legs are rufous; the third antennal

joint is rounded ; the femora have two blackish rings—one beyond the middle and the other near the

* The measurements given are exclusive of the genitalia, which are often prolonged and always turned

downwards.

366 DIPTERA.

tip; the tarsi are black, sometimes the front tibie are infuscated. Halteres palerufous. Wings hyaline;

the first posterior cell closed at the tip of the wing.

Length 5:5-7 millim. (Bigot gives 6 millim.).

Hab. Mexico 1, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith).

Five male and two female specimens. They agree with Bigot’s description, which

is evidently taken from a female specimen, his indication that it was a male being

merely a slip of the pen or a typographical error.

4. Micropeza nigricornis, sp. n., ¢ °.

Cinereous ; thorax with two brown stripes ; front, occiput, and antenne black ; legs rufous, the femora with

a blackish ring.

Length 4 millim.

Occiput more prominent than in the preceding species (1. obscura), shining black; front, face, and cheeks

very narrow, the front black, the face and cheeks pale yellow. Antenne black ; the third joint rounded.

Proboscis rufous. Thorax cinereous, with two brown stripes, and laterally, above the grey pleure, a

black band extending from the shoulders to the base of the wings; scutellum blackish. Abdomen black,

with whitish incisions, in the male clavated towards the end and with yellowish genitalia ; ovipositor of

the female shining black. Legs rufous; the femora with the apex and a ring before it blackish ; tips of

the tibie and the tarsi black. Halteres brown. Wings hyaline; first posterior cell narrowly opened, in

one of the specimens closed at the tip of the wing.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (7. H. Smith).

Two males and one female.

5. Micropeza bilineata, sp. n., 2.

Thorax cinereous, with two median stripes and some markings on each side brown; abdomen black, with

white incisions ; antenne and legs rufous ; femora with two blackish rings.

Length 7 millim.

Head in profile somewhat triangular ; front nearly as broad as the eyes, black, with two rufous spots; face

and cheeks yellow; occiput largely developed, black in the middle, with two white spots near the ocelli,

the sides rufous, with a brown spot. Antenne short; basal joints black ; third joint rounded, rufous,

the upper margin black; arista yellowish. Thorax cinereous, the shoulders rufous; thoracic dorsum

with two brown median stripes, which do not reach the anterior border ; on each side of them are some

brown lines and spots; scutellum brown, with the hind margin rufous ; pleure and metanotum grey.

Abdomen black; hind borders of the segments narrowly white ; the underside rufous; ovipositor shining

black, rufous in the middle. Legs rufous; the femora with the apex and two rings before it, the tibix

towards the tip, and the tarsi, black. Halteres brown. Wings yellowish-hyaline ; third vein straight,

the fourth slightly arcuated and joining the third at some distance from the tip of the wing.

Had. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

Three female specimens.

6. Micropeza stigmatica, sp.n.¢ ¢. (Tab. IX. figg. 17, ¢ ; 1’a, head in

profile.)

Thorax cinereous, with three brown dorsal lines; pleure with many small dots; antenne and legs rufous,

the femora with two blackish rings.

Length 5-7 millim.

MICROPEZA.—CALOBATA. 367

Head brownish-rufous; front narrow, anteriorly with two black spots, which on the outside have a silvery-

white reflection ; face and cheeks yellow, laterally silvery-white ; occiput moderately projecting, greyish,

on each side of the ocellar tubercle a white spot; postvertical bristles arising from black points. Antenne

rufous ; third joint rounded; arista pale. Thorax cinereous; on the dorsal surface are three brown lines

close to each other and not reaching the anterior border; on each side of them several other lines and

spots, forming a regular brown pattern; pleure grey, with numerous brown dots; scutellum brown, its

hind border and the metanotum grey. Abdomen of the male variable in colour: sometimes testaceous

or rufous, with yellow hind margins to the segments, or nearly black with whitish margins; the anal

segment and a projection under the penultimate segment pale rufous. Abdomen of the female black,

with white hind-borders to the segments; ovipositor rufo-testaceous, its apical joint shining black.

Legs yellowish-rufous ; two rings on the apical half of the femora, the tips of the tibie, and the tarsi,

black. Halteres brown. Wings hyaline ; first posterior cell closed and more or less petiolated at the

tip of the wing; the fifth vein often less conspicuous beyond the posterior cross-vein.

Hab. Mexico, Northern Sonora (Morrison), San Blas in Jalisco, Atoyac in Vera

Cruz (Schumann), San Lorenzo, Cordova (M. Trujillo), Medellin in Vera Cruz and

Dos Arroyos in Guerrero (ZH. H. Sinith).

Several specimens of both sexes.

| CALOBATA.

Calobata, Meigen, Illig. Magaz. i1. p. 276 (1803).

This genus includes numerous exotic species, chiefly American, very interesting on

account of their form and coloration, and the markings of their wings. Several

dipterologists have attempted to divide Calobata into smaller genera, but most of these

subdivisions are not sufficiently well characterized. I prefer, therefore, to adopt here

the genus in its widest sense, excluding only the genus Cardzacephala, Macq., the

separation of which seems to be fully justified.

The Mexican collections before me contain representatives of sixteen species of

Calobata.

1. Terminal section of the fourth vein (from the posterior cross-vein to

the tip of the wing) more than twice as long as the distance

between the end of the second and that of the third vem . . . 2.

Terminal section of the fourth vein as long as the distance between

the end of the second and that of the third vein, or a little longer,

but never double its length. . . . . . . . 5.

2. Auxiliary and first veins close together over their whole length and

ending in the costa before the small cross-vein: rufous species . rubella, v.d. Wulp.

Auxiliary and first veins widely separated at their points of issue in

the costa, the first vein reaching to beyond the small cross-vein :

black species, mostly with uniform blackish wings . . . . . 3.

3. Legs, including the tarsi, black . . . . - . +. + . + « erythrocephala, Fabr.

Legs black, with some of the tarsi white . . . 2. 4

4, Basal joint of the fore and hind tarsi white; wings blackish . . . diversa, Schin.

Basal joint of the fore tarsi only white ; wings with brown cross-

bands . 2 ew we ee ee we ee ee manifesta, v. d. Walp.

368

10.

11.

12.

13.

14.

15.

. Median cross-band narrower than the hyaline interstices ;

DIPTERA.

. Third basal (anal) cell of usual shape, forming a triangle .

Third basal cell very elongate and pointed, reaching to near the hind

border of the wing .

. Wings yellowish, clouded with brown

Wings hyaline, with three blackish cross-bands .

Black species; four posterior femora black, rufous in the middle

Rufous species ; four posterior femora rufous, with brown rings

thorax

black

Median cross-band broader than the hyaline interstices ;

rufous .

. Black species; four posterior femora black or brown, with white

rings . . . . . oe

Rufous species (in C. munda the » abdomen and legs are partly black);

four posterior femora rufous , with white rings, which often have

a dark margin

All the tarsi black .

Front tarsi white . . . . .

Wings with three blackish cross-bands, which a are extended to the

hind border ; the intermediate and apical bands broad and sepa-

rated by a semilunar transparent stripe; first posterior cell closed ;

front tarsi with their joints 2-4 white .

The cross-bands of the wings not reaching the hind order ; the

first band often wanting or only indicated by a less distinet spot

in the upper basal cell; first posterior cell not closed; front tarsi

entirely white - . ee re

Head and antenneze brown or blackish ; middle and hind femora

white at the base See ee ee ee,

Head and antenne rufous; all the femora white at the base .

Wings with three cross-bands .

Wings with two cross-bands soe ee . .

Median cross-band not enlarged in the middle and not extended to

the posterior cross-vein oe woe coe oe

Median cross-band enlarged in the middle and covering the posterior

cross-vein . Soe ee ee ee ee

front femora not annulated; front tarsi

with the first and second joints white; wings with narrow cross-

bands . es 5 2 5 ws ew ew we tl ll ee

Thorax with blackish dots; front femora annulated like the others ;

front tarsi wholly white; wings with broad cross-bands

Thorax uniformly rufous ;

1. Calobata rubella, sp. n., 2.

thorax

plectilis, Gigl.-Tos.

russula, v. d. Wulp.

bracteata, v. d. Wulp.

grata, v. d. Wulp.

10.

13.

latifascia, v. d. Wulp.

11.

lunulata, v. d. Wulp.

12.

annulata, Fabr.

conveniens, v. d. Wulp.

14.

15.

ichneumonea, Brauer.

munda, v. d. Wulp.

callichroma, Bigot.

stellata, v. d. Wulp.

(Tab. TX. fig. 18, wing.)

Shining rufous; abdomen, tarsi, and hind tibie brown; wings yellowish, the tip and a central spot slightly

infuseated.

Length 7 millim.

CALOBATA, 369

Head and thorax bright yellowish-rufous. Antenne rufous; basal joints short, the second with short hairs

above and a long bristly hair beneath; third joint rounded, as long as the preceding joints together ;

arista nearly bare. Abdomen shining brown; the last segments turned downwards and ending in a

point. Legs rufous; fore and middle tarsi brown; hind tibie and tarsi, and sometimes the middle ones

as well, dark brown, nearly black. Halteres rufous. Wings yellowish ; a pale brown spot outside the

small cross-vein, and the tip of the wing slightly infuscated; veins yellow; auxiliary and first veins

close together: second vein nearly reaching the end of the costa; small cross-vein before the middle of

the discal cell ; first posterior cell slightly attenuated, but rather widely opened at the apex ; third basal

cell triangular.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smth).

Three female specimens.

2. Calobata erythrocephala.

Calobata erythrocephala, Fabr. Syst. Antl. p. 260.17; Wiedem. Aussereur. zweifl. Ins. 11. p.532. 1’;

Walk. ist Dipt. Brit. Mus. iv. p. 1055°; Schiner, Dipt. Novara Reise, p. 250. 56°; van der

Wulp, Tijdschr. voor Ent. xxvi. p. 49. 2°; Gigl.-Tos, Mem. R. Accad. Scienze di Torino,

ser. 2, xlv. (sep.) p. 62°.

Black, except the head, which is bright red, the prelabrum, however, shining black ; legs, including the tarsi,

black ; wings intensely blackish, especially along the costa; auxiliary cell very elongate, the end of the

first vein being much beyond the small cross-vein ; second vein reaching to near the end of the costa ;

third basal cell triangular and pointed, but not elongate. .

Hab. Mexico?>®; Nicaragua, Chontales (Janson)—SoutH America!*, Brazil ?;

ANTILLES, Guadeloupe®.

A single female specimen of this species has been received from Chontales.

8. Calobata diversa. (Tab. IX. fig. 19, ¢.)

Calobata diversa, Schiner, Dipt. Novara Reise, p. 250.57'; van der Wulp, Tijdschr. voor Ent.

Xxvi. p. 49. 3°.

Calobata calocephala, Bigot, Ann. Soc. Ent. Fr. 1886, p. 375. 4°.

Hab. Mexico?*, Omealca, Orizaba (JZ. Trujillo), Atoyac in Vera Cruz (Schumann

& H. H. Smith); Guatemata, Zapote and Capetillo (Champion); Costa Rica, Caché

(Rogers).

Several specimens of both sexes. In its general facies and coloration, and in the

venation of the wings, this species agrees with C. erythrocephala, but differs from it in

having the first joint of the fore and hind tarsi white. The hypopygium of the male

is broad, turned downwards and truncated at the apex; inwards, there are two long

and two short filiform appendages, which are hairy at the tip.

Wiedemann (Aussereur. zweifl. Ins. ii, p. 533) mentions a variety of C. erythrocephala,

F., with white tarsi, this being probably the C. diversa of Schiner. Dr. Giglio-Tos

(Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 62) also regards this latter as

a variety only ; but, as intermediate specimens have not been found, I believe that it

is a good species.

BIOL. CENTR.-AMER., Dipt., Vol. II., December 1897. 36

370 _ DIPTERA.

4. Calobata manifesta, sp.n., @. (Tab. IX. fig. 20, wing.)

Black, front dark red ; first joint of the fore tarsi white ; wings subhyaline, the costa, a cross-band, and the

apex brown.

Length 10 millim.

the lateral borders black: face and occiput shining bluish-black, the face with white reflections; antenne

and the thick proboscis black. Pleure steel-blue. Legs black; the front coxs with a whitish reflection,

the front tibia at the tip on the inner side and the first joint of the tarsi of the same pair of legs white.

Halteres black. Wings greyish hyaline; the costa brown; behind the middle is a brown cross-band,

reaching to the posterior cross-vein ; the tip of the wings broadly brown ; auxiliary cell elongate ; first

vein ending above the small cross-vein ; second vein nearly reaching the end of the costa; small cross-

vein on the middle of the discal cell; posterior cross-vein perpendicular and straight; third basal cell

forming a pointed triangle.

Hab. Costa Rica, Volcan de Irazu 6000 feet (Rogers).

A single female specimen.

5. Calobata plectilis. (Tab. IX. fig. 21, ¢.)

Calobata plectilis, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 62°.

Hab. Mexico1, Omilteme 8000 feet, and Sierra de las Aguas Escondidas, both in

Guerrero (H. H. Smith).

Two female specimens, agreeing with the description quoted, of which I here give a

translation :—

“ Female.—The whole body black, including the face, front, antennse, proboscis, and palpi; the face laterally

along the eyes cinereous ; arista bare; the breast before the intermediate legs slightly cinereous ; legs

black ; first and second joints of the front tarsi whitish ; a large portion in the middle of the intermediate

and hind femora yellow. Wings yellowish, with yellow veins ; a rather indistinct yellow spot close to

the costa behind the middle and a similar spot at the tip of the wing.—Length from the head to the tip

of the wings 15 millim.”

In the two specimens before me the first joint of the hind tarsi is somewhat whitish

on the inner side; the markings on the wings are of a faint brownish-yellow colour,

and the spot behind the middle is extended downwards to an angulate cross-band ; the

first vein reaches the costa above the small cross-vein, which is placed just before the

middle of the discal cell; the terminal section of the fourth vein is a little longer than

the distance between the end of the second and that of the third vein ; the third basal

cell is triangular and pointed, but not elongate-—Length (from the head to the end of

the abdomen, exclusive of the ovipositor) 9 millim.

The male is unknown.

6. Calobata russula, sp.n., ¢ @. (Tab. IX. fig. 22, 3.)

Rufous; a spot on the front, the fore tibie, and the fourth and fifth segments of the abdomen black ; fore

tarsi white ; middle and hind femora with brown rings; wings yellowish, with a cross-band and the tip

brownish.

Length 7:5 millim.

Head, including the antennz and the proboscis, rufous; a black oval spot on the front immediately before the

CALOBATA. 371

~ insertion of the antenne ; third antennal joint short-ovate; arista black, with microscopical pubescence.

Thorax, scutellum, pleure, and metanotum rufous; thoracic dorsum with an indistinct brown line.

Abdomen pale rufous, the sides and the fourth and fifth segments blackish; the curved coniform hypo-

pygium of the male, and two small appendages on the underside of the fourth segment, rufous; ovipositor

of the female rufous, with a black tip. Legs rufous; the first pair with the tips of the femora and the

whole of the tibiee black, and the tarsi entirely white; the middle and hind pairs with two brown rings

on the femora—one behind the middle and the other near the tip, and the tarsi infuscate. Halteres

yellow. Wings yellowish-grey ; a curved brownish cross-band starts from the end of the second veln and

extends to the inner side of the posterior cross-vein, but does not reach the small cross-vein ; the tip of

the wing is broadly bordered with pale brown. First vein very near the auxiliary vein and ending in

the costa some distance before the small cross-vein; end of the second vein a little beyond the posterior

cross-vein; small cross-vein on the middle of the discal cell; posterior cross-vein perpendicular and

straight ; third basal cell triangular.

Hab. Mexico, Omilteme in Guerrero 8000 feet (7. H. Smith).

Six specimens, including both sexes.

7. Calobata bracteata, sp.n., 2. (Tab. 1X. fig. 23, wing.)

Black; head, prothorax, middle and hind legs rufous ; fore legs black ; first joint of the fore and hind tarsi

. white ; wings with three blackish bands.

Length 7 millim.

Head dark rufous; front with two shining bluish-black spots: ocellar dot black, surrounded by a whitish

dust; a narrow white margin to the orbits. Antenne brown; third joint elliptical, longer than the

basal joints ; arista nearly bare. Proboscis thick, rufous. Thorax black, with some metallic reflections,

the shoulders rufous; scutellum velvety-black ; pleure and metanotum steel-blue. Abdomen shining

black, the hind borders of the segments sometimes with whitish reflections. Coxe black, with white

reflections ; fore legs brownish-black, with the first joint of the tarsi white ; middle and hind legs rufous,

the middle tarsi brownish, the first joint of the hind tarsi white, the following joints black; hind femora

with a longitudinal groove on the outer side. Halteres brown. Wings hyaline, with three blackish

cross-bands, the first and second traversing the discal cell before and behind the small cross-vein, and

somewhat faded towards the hind border, the third band forming a border at the tip of the wing; media-

stinal cell distinct ; end of the first vein before the small cross-vein, that of the second nearly above the

posterior cross-vein; small cross-vein on the middle of the discal cell; third basal cell triangular.

Hab. Mexico, Vera Cruz (H. H. Smith).

Three female specimens.

8. Calobata grata, sp.n., ¢ 9. (Lab. IX. fig. 24, wing.)

Rufous ; base of the tarsi and two rings on the middle and hind femora whitish; wings with three blackish

cross-bands, the median band enlarged in the middle and covering the posterior cross-vein.

Length 6°5-8 millim.

Head flesh-coloured ; sides of the front and face white; front with several grooves; ocellar dot shining black,

before it a velvety-black spot; a similar spot on each side between the orbits and the root of the antenne ;

face with two transverse grooves ; sides of the occiput shining brown, with blue reflections. Antenne

rufous; third joint elliptical ; arista bare. Preboscis thick, dark brown. Thorax, pleura, scutellum, and

abdomen rufous; in some specimens the thoracic dorsum shows an indistinct brownish transverse band ;

the pleure beneath the shoulders and the metanotum have a whitish-grey reflection ; borders of the

abdominal segments whitish ; the furcate organ of the male genitalia rather short; ovipositor of the

female elongate, pointed, yellow, beneath and towards the tip shining black. Legs rufous; middle and

hind femora with two narrow white rings—one at the base, the other beyond the middle; first join of

the front tarsi white, the base of the other tarsi also whitish. Halteres brown. Wings hyaline; the

36 2

372 DIPTERA.

blackish cross-bands extending from the costa to the hind border; the median band enlarged in the

middle, covering the posterior cross-vein, but not reaching the small cross-vein ; second vein ending in

the costa above the posterior cross-vein; small cross-vein before the middle of the discal cell; first

posterior cell attenuated, but not closed ; third basal cell triangular, somewhat extended in a point, which,

however, is removed from the hind border.

Hab. Mexico, Acapulco, Dos Arroyos, and Venta de Zopilote, all in Guerrero

(H. H. Smith), North Yucatan (Gaumer).

Three males and one female.

9. Calobata latifascia, sp.n., ¢ 2. (Tab. IX. fig. 25, 2 .)

Black; middle and hind femora with white rings; wings with a broad blackish cross-band behind the middle,

the tip infuscated ; third basal cell elongate.

Length 8 millim.

Head bluish-black ; face laterally whitish. Antenne black; basal joints short; third joint elliptical; arista

bare. Proboscis thick and black. Thorax, scutellum, and metanotum black, opaque; prothorax shining

black; pleurz above the middle cox with a white reflection ; metanotum with a dentiform projection on

each side. Abdomen black; hind border of the second segment whitish; the last segment slightly

bluish ; the sides of the basal segments with fine, long, whitish hairs. Legs black; intermediate femora

with a white ring behind the middle; hind femora with two white rings—one at the base, the other

before the tip. Halteres black. Wings hyaline; the cross-band broad, with parallel sides, blackish-

brown, paler towards the hind border, not reaching the small cross-vein, but covering the posterior cross-

vein ; the brownish coloration of the tip of the wing slightly extended on the hind border; small cross-

vein distinctly beyond the end of the first vein and on the middle of the discal cell; second vein ending

in the costa a little beyond the posterior cross-vein ; third basal cell elongate and pointed.

Hab. Costa Rica, Caché (Rogers); Panama, Boquete 3500 feet (Champion).

One specimen of each sex.

10. Calobata lunulata, sp.n., ¢ 9. (Tab. IX. fig. 26, wing.)

Black ; femora with white rings ; front tarsi white in the middle; wings with three blackish cross-bands, of

which the second and third are separated by a semilunular interspace; first posterior cell closed.

Length 6°5—-7°5 millim.

Head reddish-brown, sometimes very obscure, nearly black; occiput shining bluish-black. Antenne varying

in colour from dark rufous to black ; third joint elliptical, twice as long as the basal joints ; arista bare.

Thorax, scutellum, and abdomen black; pleure, metanotum, and borders of the abdominal segments with

a bluish-white reflection; male genitalia with a large furcate prominence beneath; ovipositor of the

female long, coniform, and pointed. Legs black; intermediate and hind femora usually clearer, some-

times brownish-rufous, with a white ring beyond the middle, the hind femora white at the base; the

front tarsi with joints 2-4 white. Halteres black. Wings hyaline, with three blackish cross-bands—

the first before the small cross-vein and descending to the hind border at the end of the third basal cell,

the second very broad, the third forming a border at the tip of the wing, the second and third separated

by a convex or semilunular transparent stripe; second vein ending a little beyond the posterior cross-vein ;

first posterior cell closed and usually petiolated; small cross-vein beyond the end of the first vein and on

the middle of the discal cell; third basal cell elongate and pointed.

Hab. Mexico, Presidio de Mazatlan (Forrer), Medellin near Vera Cruz, Frontera and

Teapa in Tabasco (H. H. Smith), North Yucatan (Gaumer).

Several specimens of both sexes. This insect seems to be nearly allied to C. lasciva

(Fabr.), and may perhaps belong to the same species; but the descriptions of

CALOBATA. 3738

Wiedemann (Aussereur. zweifl. Ins. ii. p. 536) and Schiner (Dipt. Novara Reise, p. 553)

are not perfectly applicable to the Mexican specimens.

11. Calobata annulata. (Tab. IX. fig. 27, ¢.)

Musca annulata, Faby. Ent. Syst. iv. p. 338. 111°.

Calobata annulata, Fabr. Syst. Antl. p. 262. 7°; Wiedem. Aussereur. zweifl. Ins. ii. p. 534. 5°;

van der Wulp, Tijdschr. voor Ent. xxvi. p. 49. 4%.

Hab. Mexico, Teapa in Tabasco (H. H. Smith); Panama, Bugaba (Champion).—

Souta America, Cayenne! 23 and Surinam ¢.

Several specimens of both sexes. They vary in the coloration of the head: in some

examples it is very obscure and almost wholly black; in others it is brownish-red

(Wiedemann says “ ocherbraunlich ”), the front with a cordiform velvety-black median

spot and bluish-black lateral stripes behind. The antenne are more or less obscure in

colour; the arista is bare. The legs are black, but the hind femora are brownish

towards the tip, and the hind tibie still clearer, almost brownish-yellow; front tarsi

wholly white; intermediate and hind femora with a white ring beyond the middle, the

hind femora also white at the base. Halteres black. The blackish cross-bands on the

wings are not always fully developed, the first and third being often rudimentary

and represented by smal] spots only between the veins. The venation is like that of

C. lunulata, except that the first posterior cell is not closed.

12. Calobata conveniens, sp. n., 2.

Bluish-black; head and antenna rufous; front tarsi, base of all the femora, and a ring on the middle and

hind femora, white; wings with three blackish cross-bands, the first and third rudimentary.

Length 8°5 millim.

Closely allied to C. annulata, but differing from it in the rufous colour of the head and antenne, and in having

the fore and middle femora white at the base, as well as the hind ones. The orbits of the eyes have

silvery-white reflections; the arista is not bare, but short-plumose. The blackish cross-bands of the

wings are as imperfect as in C. annulata ; the venation is quite similar, the first posterior cell not

being closed.

Hab. Panama, Bugaba (Champion).

Four males and one female.

13. Calobata ichneumonea. (Tab. IX. fig. 28, ¢.)

Calobata ichneumonea, Brauer, Sitz.-Berichte Akad. Wissensch. Wien, xci. p. 388, tab. fig. 4 (1885).

Grallomyia caloptera, Bigot, Ann. Soc. Ent. Fr. 1886, p. 381°.

Calobata caloptera, Gig].-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 63%.

Hab. Mexico123, Xucumanatlan and Sierra de las Aguas Escondidas, both in

Guerrero (H. H. Smith); GuaTemata, San Gerénimo (Champion).

Several specimens of both sexes. Professor Brauer’s description and figure leave no

374: DIPTERA.

doubt about the determination. As his description is inserted quite incidentally in a

work which perhaps is not easily accessible, I give here a translation :—

“Brownish-yellow. Front tarsi whitish-sericeous, front tibie blackish ; the middle and hind femora with a |

clear ring at the base and another on the apical third; the wings are yellowish-hyaline ; the tip and two

cross-bands, the second of which is very broad, are brown; the anal cell is extended to near the hind

border and much (22 times) longer than the anal vein. The surface of the wings shows a splendid

- iridescéncé.”

This species is a very pretty one. ‘The antenne are rather short, the third joint

rounded ; the arista nearly or quite bare. The first joint of the middle and hind tarsi

is yellow, and often as clear as the front tarsi. The abdomen is of a coppery-red

colour; the male genitalia have beneath the penultimate segment a large furcate

organ, of which the two branches are rather long, beset with short bristly hairs and

ending in curved filiform appendages. The brown cross-bands of the wings are less

obscure towards the hind margin; the median band does not reach the cross-veins;

small cross-vein distinctly beyond the end of the first vein and on the middle of the

discal cell; end of the second vein a little beyond the posterior cross-vein ; first

posterior cell attenuated, but not closed at the tip of the wing.

The specimens vary greatly in size: the largest is 10°5 millim. in length; one of the

males measures no more than 6:6 millim.

The synonymy of Grallomyia caloptera, Bigot, is evident; the name C. ichnewmonea,

Brauer, is a year older.

14. Calobata munda, sp.n., ¢. (Tab. IX. fig. 29, wing.)

Rufous ; abdomen bluish-black above; legs blackish ; front tarsi white; middle and hind legs with flattened

tibiee and oblique white rings on the femora; wings with three blackish cross-bands, the intermediate

band enlarged and covering the posterior cross-vein.

Length 7°5 millim.

Closely resembling C. grata (no. &), but distinguished from it by the blackish legs, the flattened tibiee, and a

different neuration. The head has not deep grooves as in C. grata, and is rufous, opaque, with a black

dot in front before the ocelli; the occiput has not the bright brown sides. Antenne brownish-rufous ;

third joint elliptical; arista bare. Thorax rufous; pleure whitish-grey, with a blue reflection ; meta-

notum steel-blue. Abdomen black above, with the first and the two apical segments steel-blue, the

underside rufous; male genitalia moderately prominent, the furcate organ black and rather short. The

front legs have the coxe and femora reddish-brown, the tibie black, and the tarsi entirely white. The

intermediate and hind legs have the femora black, brownish-rufous near the tip, and with two whitish

rings—one at the base, the other beyond the middle, this latter oblique; the tibie black, flattened,

slightly enlarged, but attenuated at the base and tip, and with a longitudinal groove on each side; the

tarsi yellowish, with the second and following joints somewhat infuscated. Wings hyaline, with three

blackish cross-bands ; the median band large, not reaching the small cross-vein, but covering the posterior

cross-vein ; small cross-vein beyond the end of the first vein and on the middle of the discal cell; end of

the second vein nearly above the posterior cross-vein ; first posterior cell attenuated, but not closed; third

basal cell elongate, and pointed at a short distance from the hind border.

Hab. Mexico, Dos Arroyos in Guerrero 1000 feet (7. H. Smith).

This species seems to be allied to C. platycnema, Loew (Dipt. Amer. Sept., Centur.

vii. no. 86), from Colombia, but differs from it in the colour of the front legs, the

tibiee being black and the tarsi wholly white.

CALOBATA.—CARDIACEPHALA. 379

15. Calobata callichroma. (Tab. IX. fig. 30, ¢.)

Calobata callichroma, Bigot, Ann. Soc. Ent. Fr. 1886, p. 373. 1°; Gigl.-Tos, Mem. R. Accad.

Scienze di Torino, ser. 2, xlv. (sep.) p. 63’.

Hab. Mexico}, Atoyac in Vera Cruz (Schumann), Teapa in Tabasco (H. H. Smith) ;

Costa Rica, Caché (Logers).

Apparently a common insect where it occurs, a large series of specimens of both

sexes having been received. Bigot’s description ( ¢ ) leaves no doubt as to the identi-

fication of this handsome species ; he, however, gives the length as 11 millim., whereas

the specimens before me measure only 6:0-7°5 millim. I may add the following

particulars:—The third antennal joint is oval and the arista short-plumose. The

black spots on the front are often very large ; beneath the shoulders is a whitish spot;

the abdomen is mostly shining bluish-black ; the front cox have a white reflection ;

the front tarsi have not only the first joint, but the second also white; the middle and

hind tarsi have not always the first joint clearer than the rest. The brown central

band of the wings is rather narrow and does not reach the small cross-vein ; the border

at the tip of the wing is often pale. The small cross-vein is beyond the end of the

first vein and beyond the middle of the discal cell; the second vein ends in the costa

a little beyond the posterior cross-vein; the third basal cell is elongate and pointed at

a short distance from the hind border. ‘The male genitalia are long, the furcate

projection rufous; the ovipositor of the female is long and pale rufous.

16. Calobata stellata, sp. n., 2.

Brownish-rufous with white reflections, and black spots on the head and thorax ; abdomen black; legs brown,

the femora with white rings, the front tarsi white; wings with two brown bands.

Length 4°5 millim.

Head rufous, with white reflections; front with a rounded, black, central spot and two smaller brown dots

before the antenne. Antenne rufous; third joint oval, infuscated at the tip; arista bare. Thorax

brownish-rufous, with white reflections; three black dots placed close together on the prothorax and an

irregular black spot at the sides ; hind portion of the thoracic dorsum blackish; scutellum black ; pleure

and metanotum whitish-grey ; abdomen, including the long ovipositor, shining black. Legs brownish ;

all the femora have a whitish base and a white, brown-bordered ring beyond the middle; the front tarsi

are entirely white. Wings hyaline, with a broad blackish cross-band extending from the costa to the

fifth vein, and a brownish border at the tip; small cross-vein beyond the end of the first vein and on

the middle of the discal cell ; end of the second vein a little beyond the posterior cross-vein ; first posterior

cell attenuated towards the tip, but not closed ; third basal cell elongate and pointed.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

CARDIACEPHALA.

Cardiacephala, Macquart, Dipt. Exot. 11. 3, p. 242 (1843).

This genus, used by Macquart for Calobata longipes (Fabr.), is recognizable, among

other characters, by the four posterior femora having a swelling beyond the middle.

376 DIPTERA.

The mediastinal cell is inconspicuous, owing to the auxiliary and first veins being very

short and closely pressed against the costa.

The species belonging to it have an ant-like aspect. Calobata arthritica, Wiedem.

(Aussereur. zweifl. Ins. ii. p. 546), described without indication of origin, is evidently

a Cardiacephala. |

I have examined two species from Central America :—

Legs yellowish ; tibie: simple ; small cross-vein infuscated . . . - « « myrmex, Schiner.

Legs brown or black ; tibiee flattened ; small cross-vein not infuscated . . nigra, Schiner,

1. Cardiacephala myrmex. (Tab. IX. figg. 31, 3; 31a, abdomen, ¢;

32, abdomen, 2° .)

Cardiacephala myrmex, Schiner, Dipt. Novara Reise, p. 254. 7 1‘; Gigl-Tos, Mem. R. Accad.

Scienze di Torino, ser. 2, xlv. (sep.) p. 63. 67 *.

Hab. Mexico 2, Medellin and Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith).

—Sovurn America }.

Five males and three females.

2. Cardiacephala nigra.

Cardiacephala nigra, Schiner, Dipt. Novara Reise, p. 255. 72°.

Hab. Mexico, Medellin near Vera Cruz (H. H. Smith); Guatema.a, San Gerénimo

(Champion).—Sovutn AMERICA}.

Two males and three females.

The following species of Calobatinew have also been recorded from Mexico :—

Nerius xanthopus, Schiner, Dipt. Novara Reise, p. 247. 48 (S. America); Gigl.-

Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 64, 69.

v plurivittatus, Bigot, Ann. Soc. Ent. Fr. 1886, p. 372.

Micropeza pectoralis, Wiedem. Aussereur. zweifl. Ins. ii. p. 540. 13 (Calobata).

divisa, Wiedem. loc. cit. p. 540. 14 (Calobata).

According to Loew (Berl. ent. Zeitschr. 1868, pp. 393, 394) these two

species belong to Micropeza. |

incisa, Wiedem. loc. cit. p. 547. 2; Gigl.-Tos, loc. cit. p. 64. 69.

Syn. Micropeza appendiculata, Schiner, loc. cit. p. 250. 55.

Calobata calosoma, Bigot, loc. cit. p. 379. 7 (Teniaptera) ; Gigl.-Tos, loc. cit. p. 63,

N.B.—Teniaptera pallidipennis, Big., and T. ornatipes, Big., belong to Tanypeza

(see antea, p. 363); Megamerina fulvida, Big., to the Psiline (see p. 362).

ORTALIN &. 377

Group ORTALIN A.

Front broad, with bristles on the upper part only; vibrissee absent; clypeus usually

well developed. Abdomen with four or five segments ;

ovipositor of the female in most of the genera flattened and terminating in a point.

Wings usually with dark

markings; auxiliary vein ending obliquely in the costa, seldom approximated to the

second and third basal cells of moderate

size, the third sometimes drawn out into a pointed lobe.

Antenne with dorsal arista.

Legs of moderate size, sometimes elongate and slender.

first vein, and therefore less conspicuous ;

The genera represented in the Mexican collections before me may be tabulated as

follows :-—

1. Proboscis not incrassated; clypeus feebly developed ; ovipositor

not flattened Loe ee Loe 2.

Proboscis thick ; clypeus well developed; ovipositor flattened . 3.

2. Front very prominent; third basal cell not longer than the second. Pyrgota, Wied.

Front not prominent; third basal cell inferiorly drawn out into a

long point ; ovipositor unusually elongate . Loe ee Toxotrypana, Gerst.

3. Cheeks inferiorly at least as high as the longitudinal diameter of

the eyes . Loe Ce 4.

Cheeks inferiorly more or less developed, but never as high as the

longitudinal diameter of the eyes. 6.

. First posterior cell of the wings unusually narrowed towards its

termination, the last section of the fourth vein being angularly

bent towards the tip of the wing . toe ee

First posterior cell equally broad over its whole length

Front deeply excavated ; eyes very prominent ;

third basal cell drawn out

Front not excavated ; eyes as usual;

- into a long point .

. Third basal cell obtuse, truncated or rounded at its termination

Rhopalomera, Wied.

Rhinotora, Schin.

Stictomyia, Big.

6 7.

Third basal cell inferiorly pointed, often drawn out into a lobe . 15.

7, Third antennal joint slender, much longer than the second . 8.

Third antennal joint elliptical, oval cr rounded, not much longer

than the second 9,

. Front somewhat prominent ;

discal cell on the upperside limited

by a rectilinear vein . Ce ee

Front not prominent; the vein limiting the discal cell on the

upperside slightly inflexed before the small cross-vein .

Auxiliary vein coalescent with the first vein, the mediastinal cell

Stenopterina, Macq.

Rivellia, Rob.-Desv.

therefore inconspicuous . . . Mischogaster, Macq.

Auxiliary vein distinctly separated from the first vein 10.

10. Femora inferiorly spinose . 11.

14.

Femora without spines. . . -

BIOL. CENTR.-AMER., Dipt., Vol. IL, October 1898.

3¢

378

11.

12,

13.

14.

15.

16.

17.

18.

19.

DIPTERA.

Femora, especially the hind pair, incrassated ; cross-veins approxi-

mated re

Femora not incrassated ; cross-veins distant - oe ee

Mediastinal cell elongate, terminating in the middle of the costa .

Mediastinal cell very narrow, terminating nearer to the base of

the wing . . . to . oe

Small cross-vein on the middle or beyond the middle of the

discalcell . . 2... . soe

Small cross-vein distinctly before the middle of the discal cell .

Mediastinal cell narrow and short, terminating in the costa long

before the middle. . . . . -

Mediastinal cell of the usual shape, terminating on the middle of

the costa, above the small cross-vein ; wings broad, blackish,

with many white dots

Third basal cell inferiorly pointed, but not prolonged beyond the

end of the second hasal cell .

Third basal cell inferiorly drawn out into a long, pointed lobe .

Second vein straight

Second vein sinuous tons Soe ees

Front and face more or less prominent ; third antennal joint

elliptical, rounded at the tip soe

third antennal joint concave on

the upperside, pointed at the tip . . . rn

First vein terminating at the basal third of the costa, which is

deeply incised; discal cell shorter than the second posterior

cell

Front and face not prominent ;

First vein terminating beyond the middle of the costa, which is

straight ; discal cell much longer than the first posterior cell

Wings elongate, their anterior and posterior margins nearly

parallel ; second vein, and often the fourth also, sinuous .

Wings of the usual shape ; second and fourth veins straight, the

fourth sometimes slightly curved; first posterior cell more or

less attenuated towards the tip of the wing

PYRGOTA.

Pyrgota, Wiedemann, Aussereur. zweifl. Ins. ii. p. 580 (1830).

1. Pyrgota lugens, sp. n., 3.

wings brownish-black.

Length 14 millim.

In its general shape agreeing with P. undata, Wied., but with the whole body, and also the head, unicolorous

deep black. First and second antennal joints black, the third joint reddish-brown ;

black at the base, which shows a distinct, but very short, basal joint.

proboscis thick; the palpi with short black bristles.

the scutellum these hairs are longer and erect.

Richardia, Rob.-Desv.

12.

Paneryma, v. d. Wulp.

13.

Cyrtometopa, Low.

Stenomacra, Low.

Automola, Low.

Amp hicnephes, Low.

16.

19.

17.

18.

Tetanops, Fall.

Anacampta, Low.

Ostracocelia, Gigl.-Tos.

Xanthacrona, v. d. Wulp.

Pterocalla, Rond.

Eueesta, Low.

(Tab. X. figg. 1; la, head in profile.)

Black ; third antennal joint brown; legs piceous ;

arista pale rufous,

Proboscis and palpi black; the

Thorax and abdomen with short black hairs ;

Legs piceous, with short black hairs, but without

PYRGOTA.—RHOPALOMERA. 379

bristles, except a very small spur on the middle tibia. Halteres piceous. Wings proportionately some-

what narrower than in P. undata, blackish-brown, hardly less obscure towards the tip; venation as in

P. undata.

Hab. GuateMALA, Panima in Vera Paz (Champion).

A single male specimen.

TOXOTRYPANA.

Toxotrypana, Gerstacker, Stett. ent. Zeit. xxi. p. 191 (1860).

This genus was referred by Gerstiicker to the Trypetine; but according to Low

(Monogr. Dipt. N. Amer. iii. p. 34) it is better placed among the Ortaline (section

Pyrgotine), and von Réder is of the same opinion (Wien. ent. Zeit. x. p. 31).

1. Toxotrypana curvicauda. (Tab. X. figg. 2; 2a, wing.)

Toxotrypana curvicauda, Gerst. loc. cit. p. 194, t. 2. fig. 9°.

Had. Mexico, North Yucatan (Gawmer).—ANTILLES, St. John, Antigua '.

Three female specimens, agreeing with Gerstiicker’s description. In one of them

the extraordinary cross-vein which unites the second vein with the costa is quite

rudimentary (see fig. 2a).

Mikimyia furcifera, Big. (Bull. Soc. Ent. Fr. 1884, p. xxix), from Brazil, is probably

identical with Toxotrypana curvicauda, Gerst. (of. J. Mik, Wien. ent. Zeit. 1x. p. 251).

RHOPALOMERA.

Ropalomera, Wiedemann, Aussereur. zweifl. Ins. ti. p. 570 (1830).

1. Rhopalomera, sp. (Tab. X. figg. 3; 3a, head from in front; 36, head in

profile. )

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith), North Yucatan (Gawmer) ;

GuateMaLa, Torola (Champion); Nicaragua, Chontales (Janson).

I have attempted in vain to name the numerous specimens of this genus before me

from the existing descriptions. In most of them the face and antenne are yellowish-

rufous, and the legs are rufous; but in some darker examples the facial protuberance,

and sometimes the whole head, is brownish, and the legs are piceous. As there are

many transitions between the darker and more clearly coloured individuals, I have no

oubt that they all belong to the same species.

There is still much confusion regarding the described species of fthopalomera, and I

therefore merely give a figure of tie Central-American insect, which I hope will be

recognized by some future dipterologist, who, with more material, may critically review

this interesting genus. Williston’s paper ‘‘On the Rhopalomeride” (Psyche, 1895,

p. 183) is nothing more than a preliminary notice. The present species is a true

3¢2

380 DIPTERA.

Rhopalomera, not belonging to any of the genera which Williston has separated from

it; it has the legs densely haired, the hind tibie enlarged, and the wings without

distinct markings.

RHINOTORA.

Rhinotora, Schiner, Reise der Novara, Dipt. p. 233 (1868).

1. Rhinotora, sp. (Tab. X. figg. 4, head from in front; 4a, head in profile.)

Hab. Costa Rica, Volcan de Irazu 6000 feet (Logers).

A single male specimen. It does not fully agree with &. pluricellata, Schiner (l. c.),

nor with ZR. diversa, Gig].-Tos (Mem. R. Accad. Sci. di Torino, ser. 2, xlv. sep. p. 43), but

as it is somewhat badly preserved, I must abstain from describing it.

STICTOMYIA.

Stictomyia, Bigot, Bull. Soc. Ent. Fr. 1885, p. clxvi.

1. Stictomyia longicornis. (Tab. X. figg.5; 5a, head from in front; 5}, head

in profile; 5¢, wing seen against a dark ground.)

Stictomyia longicornis, Bigot, loc. cit.’.

._ Hab. Mexico !.

Several years ago the late M. Bigot gave me one of his specimens (a female) of this

species, and at that time I prepared some drawings of it, but neglected to make

further notes. The insect is unfortunately in a bad state of preservation, and I

therefore content myself with reproducing the figures, which will give a fair idea of

the insect. I may note that the abdomen is not longer than the thorax, and much

flattened. .

STENOPTERINA.

Stenopterina, Macquart, Suites 4 Buffon, ii. p. 453 (Senopterina) (1885).

This genus is represented in the Mexican collections before me by two species :—

Thoracic dorsum steel-blue ; wings with a costal border, the first basal cell, and

a border along the posterior cross-vein, brown. . . . . . . . . . =mexicana, Macq.

Thoracic dorsum black, not metallic; wings with a large brown space, which

includes the mediastinal and the first basal cells, and is united at its

termination with the brown border of the posterior cross-vein . . . . . alligata, v. d. W.

1, Stenopterina mexicana. (Tab. X. fig. 6, wing.)

Herina mexicana, Macq. Dipt. Exot. ii. 8, p. 208, t. 29. fig. 27.

Stenopterina cerulescens, Low, Monogr. Dipt. N. Amer. ii. p. 97.

Hab. Norta America, Texas®.— Muxico!, Chilpancingo in Guerrero 4600 feet

(H. H. Smith), Guadalajara and Santiago Iscuintla, both in Jalisco (Schumann), North

Yucatan (Gaumer).

STENOPTERINA,—RIVELLIA. | 381

Several specimens of both sexes. They all belong to the dark form mentioned in

Léw’s description. The femora are steel-blue, with scarcely any indication of rufous

colour at the tip; the tibie and tarsi are reddish-brown, sometimes blackish. The

brown stripe, covering the first basal cell, is often at its base more or less extended

over the second basal cell. The ovipositor of the female is flattened and brown, with

a thin, rufous terminal joint.

Léw presumed (J. c. p. 98) that his 8. cwrulescens might be conspecific with Herina

mexicana, Macq.*, and I have no doubt that this is the case. Macquart’s short

description, though taken from an imperfect specimen, is fully applicable, and his

figure of the wing docs not show any discrepancy of importance.

2. Stenopterina alligata, sp.n.,¢. (ab. X. fig. 7, wing.)

Steel-blue; thoracic dorsum black, with indistinct grey stripes; legs brownish-red; halteres black; wings

subhyaline, an apical border and a large space, connected with the border of the posterior cross-vein, brown,

Length 9 millim.

Closely allied to S. meaicana, and agreeing with it in most of its characters. The thoracic dorsum, however,

is not metallic, but black, with indication of greyish stripes. Wings with a large brown patch extending

from the base to beyond the small cross-vein—including the mediastinal cell, the first and second basal

cells, and the greater part of the discal cell,—and connected with the brown border of the posterior

cross-vein ; there is no continuous costal border, but a separate brown apical spot ; the mediastinal cell is

longer than in S. meazcana.

Hab. Mexico, Paso del Macho (fége).

Two female specimens.

RIVELLIA.

Rivellia, Robineau-Desvoidy, Essai sur les Myodaires, p. 729 (18380).

This genus is represented in the Mexican collections by eight species. The wings

have a blackish pattern, consisting of four more or less complete cross-bands—the first

often connected with the blackish basal marking, the second including the small cross-

vein, the third bordering the posterior cross-vein, and the fourth forming a border at

the tip. The greater or less extension of these bands, and their general contiguity,

afford good specific characters.

1. Legs yellowish-rufous. 2. 6. ee ee ee ee

Legs black (in R. pilosula and R. longicornis piceous or dark rufous) . 4.

2. Base of the wings hyaline; the cross-bands very narrow . . . . . occulta, v.d. W.

Base of the wings blackish . . . . . . . 3

3. The first cross-band united with the ‘blackish pattern of the base,

inferiorly not reaching the fifth vem . . toe ee ee micans, Liaw.

The first cross-band separated from the blackish pattern of the base,

inferiorly reaching to beyond the fifth vem . . . . . . . . « submetallica,v. d. W.

* Incorrectly termed H. metallica by Low.

382 DIPTERA.

4. Cross-bands very broad, the first three contiguous at the hind margin,

the third and fourth united at the costa. . . . . ee Conjuncta, Low.

Cross-bands of moderate breadth or narrow. . . . . 5.

5. The second cross-band in the middle largely united with the first . . connecta, v.d. W.

The second cross-band over its whole length separated from the first, or

(in R. pilosula) united with it only inferiorly . . . 6.

6. The blackish pattern at the base forming with the first cross- band a lar ge,

curved spot, which is not interrupted by hyaline portions . . . flexuosa, v. d. W.

The blackish pattern at the base, in connection with the first cross- band,

interrupted by hyaline spots . . . . . | . . Woe

7. The first cross-band much broader than the others and connected j in the

discal cell with the second cross-band. . . . . pilosula, v. d. W.

The cross-bands equal in breadth, the first not connected “with ‘the

second . 2. we ee ee ee ee ee ee ee Longicornis, v. d. W.

1. Rivellia occulta, sp.n., ¢ @. (Tab. X. fig. 8, wing.)

Black ; head, antennew, and legs rufous; wings hyaline, with three linear cross-bands and a blackish apical

spot.

Length 2 millim.

Head rufous ; front as broad as the eyes, with parallel sides ; occiput blackish. Antenne rufous, usually a

little infuscated towards the tip; shorter than in the allied species. Proboscis black. Thorax, scutellum,

and abdomen black ; thoracic dorsum with some cinereoas dust ; scutellum with two rather long bristles ;

abdomen elliptical, in the female more elongate; first joint of the ovipositor flattened, brown; the second

cylindrical, pale rufous. Legs yellowish-rufous, the terminal tarsal joints slightly infuscated. Halteres

yellow. Wings hyaline; three narrow brownish cross-bands extending from the costa to the fifth vein—

the first and second oblique, the second bordering the small cross-vein, the third perpendicular, bordering

the posterior cross-vein, the first and second sometimes interrupted at the fourth vein; a more or less

extended brownish spot at the tip of the wing. :

Hab. Mexico, Chilpancingo 4600 feet, and Omilteme 8000 feet, both j in Guerrero

(H. H. Smith).

Six males and one female. One of the males is a little larger in size (length nearly

3 millim.), and has the front and face more brownish ; it is probably a variety.

2. Rivellia micans, (Tab. X. fig. 9, wing.)

Rivellia micans, Low, Monogr. Dipt. N. Amer. iii. p. 94°.

Hab. Nortu America; Texas '.—Mexico, Northern Sonora (Morrison).

A single male specimen, agreeing with Low’s description ; it is of a bright metallic

coloration ; the reddish cross-band on the abdomen is road, and occupies a large

portion of the second and third segments.

3. Rivellia submetallica, sp.n. 3. (‘Iab. X. fig. 10, wing.)

Black, slightly metallic; front and legs rufous; tibia brown ; the first cross-band angular.

Length 4 millim.

Front dark rufous, a little broader than the eyes, with parallel sides ; face distinctly excavated, greyish ; the

clypeus and the cheeks pale rufous ; inferior portion of the cheeks larger than in the other species of the

RIVELLIA. 383

genus ; occiput black. Basal joints of the antenne rufous (the third joint is wanting). Thorax and

scutellum black; thoracic dorsum with a short, dense, yellowish pilosity; pleure with some bluish

metallic reflections; scutcllum with two bristles. Abdomen curved downward, rather broad at the base,

attenuated towards the tip, somewhat metallic greenish-black, densely covered by a greyish pilosity ;

genitalia on the ventral side with two appendages. Fore coxw yellowish-rufous, middle and hind cox

black ; legs yellowish-rufous, the tibis and the terminal two or three tarsal joints brown. Halteres

blackish. Wings greyish-hyaline; the brown pattern generally agreeing with that of the preceding

species (2. micans), but the first cross-band is angular in shape, distinctly separated from the blackish

base and, though less intense, prolonged to beyond the fifth vein.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single male specimen.

4, Rivellia conjuncta. (Tab. X. fig. 11, wing.)

Rivellia conjuncta, Léw, Monogr. Dipt. N. Amer. iii. p. 88, t. 8. fig. 3 -

This species is easily recognizable by the large extension of the blackish pattern on the wings, the cross-bands

being much broader than in the other members of the genus. The first cross-band is fully connected

with the black base and separated from the second only by a triangular hyaline spot at the costa; the

first, second, and third cross-bands are largely coalescent at the hind margin of the wing, the third,

moreover, is united at the costa with the fourth, which forms a rather broad border at the tip.

Hab. Nortu America, Maryland 1—Mexico, Cuernavaca in Morelos, Amula and

Chilpancingo in Guerrero (//. H. Smith); Costa Rica, Caché (Rogers).

Several specimens of both sexes.

5. Rivellia connecta, sp.n., ¢. (Tab. X. fig. 12, wing.)

Shining black ; front and antenne brownish; legs black, the base of the tarsi yellowish ; the second cross-

band in the middle largely united with the first, which is connected with the blackish base.

Length 2°5 millim.

Front brownish, as broad as the cyes, with parallel sides; face cinereous, perpendicular, not excavated ;

clypeus large; occiput black. Antenne rufous; the third joint on the fore side and towards the tip

infuscated ; arista pale rufous. Thorax, scutcllum, and abdomen shining black ; the abdomen ovate.

Legs black ; the tarsi yellowish, but infuscated towards the tip. Halteres blackish. Wings hyaline; the

first cross-band is broad and at the costa largely connected with the blackish base—inferiorly it reaches,

though less intense, to beyond the fifth vein, and in the middle it is largely united with the second cross-

band, which is much narrower, rather perpendicular, slightly concave at its outer side, and terminates at

the fifth vein; between the first and second cross-bands there remain only two triangular hyaline spots—

one at the costa, the other in the discal cell; the third cross-band is parallel with the second, of the same

breadth, but longer, bordering the posterior cross-vein and terminating near the hind margin of the wing ;

at its costal end the third band is united with the fourth, which forms a rather narrow border along the

terminal portion of the costa and the tip of the wing to as far as the termination of the fourth vein.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single male specimen.

6. Rivellia flexuosa, sp.n., ¢. (Tab. X. fig. 13, wing.)

Black ; front and antennx brownish ; tarsi rufous ; first cross-band broad, contiguous with the blackish base

of the wing; third cross-band connected at the hind margin with the second and at the tip with the

fourth band.

Length 3°5 millim.

384 | DIPTERA.

Head black; front in the middle brownish, immediately before the antenne with two small, rufous

protuberances ; face slightly concave; occiput shining black. Antenne rufous, on the outer side

brownish. Thorax, scutellum, and abdomen shining black ; scutellum with two long bristles ; abdomen

elliptical. Legs black, the tarsi, save the last two or three joints, yellowish-rufous ; the femora somewhat

elongate; the hind tibie slightly curved. Halteres brown. Wings hyaline, with a blackish pattern ;

the first cross-band broad, completely united with the blackish base, on the outer side convex, inferiorly

reaching to beyond the fifth vein; the other cross-bands narrower ; the second issuing from the costa at

the termination of the first vein and in an oblique direction reaching the small cross-vein, where it is

angularly curved and goes more perpendicularly to the hind margin of the wing; the third cross-band

straight, at the hind margin connected with the second and at the costa with the fourth, which borders

the tip of the wing.

Hab. Mexico, Omilteme in Guerrero 8000 feet (fH. H. Smith).

A single male specimen.

7. Rivellia pilosula, sp.n.,¢. (Tab. X. fig. 14, wing.)

Blackish, with grey pilosity ; first cross-band broad, connected with the blackish base of the wing and

inferiorly with the much narrower second cross-band, the third and fourth bands united at the costa,

Length 2°5 millim.

Front brownish-rufous, as broad as the eyes, with parallel sides; face greyish, very slightly excavated ; inner

orbits of the eyes white. Antenne rufous; the third joint more obscure, somewhat pointed towards the

tip, reaching to near the oral margin. Proboscis black, thick. Thorax, scutellum, and abdomen black, -

covered with short greyish hairs ; the abdomen ovate, posteriorly pointed; second joint of the ovipositor

pale rufous. Legs piceous, somewhat dark rufous, the tarsi clearer. Wings hyaline; the first cross-

band much broader than the others, connected with the blackish base, the separation being only indicated

by one or two small, elongate, hyaline spots ; the second cross-band united with the first just before the

small cross-vein, the two prolonged together in a less intense infuscation in the middle of the discal cell ;

the third cross-band united with the fourth and with it forming a narrow border round the tip of the

wing.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

8. Rivellia longicornis, sp.n., ¢ ¢. (Tab. X. fig. 15, wing.)

Shining black ; head and antenne rufous; legs piceous, partly dark rufous ; cross-bands of equal breadth, the

third and fourth narrowly united on the costa.

Length 3°5-4°5 millim.

Front dark rufous, a little broader than the eyes, with parallel sides; face clearer rufous, perpendicular ;

inner orbits white. Antenne rufous, longer than in most other species of the genus, reaching the oral

margin. Proboscis thick, black; palpi rufous. Thorax, scutellum, and abdomen shining black; the

abdomen ovate, pointed towards the tip, covered with greyish hairs, but less densely so than in the

preceding species (f. pilosula); male genitalia with two filiform appendages on the ventral side ;

ovipositor of the female rather narrow, three-jointed, the first two joints flattened and black, the third

cylindrical, pale rufous. Halteres black. Wings hyaline, with blackish cross-bands; the first cross-band

not broader than the others and connected with the blackish base, the second isolated, the third prolonged

and forming a border along the end of the costa and the tip of the wing.

Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single specimen of each sex.

MISCHOGASTER.—RICHARDIA. 385

MISCHOGASTER.

Mischogaster, Macquart, Suites & Buffon, ii. p. 483 (Michogaster) (1835).

1. Mischogaster nitidipennis, sp.n., ¢. (Tab. X. figg. 16; 164, tip of the

abdomen.)

Shining black ; wings hyaline, the costa to the termination of the first vein and the apical third black.

Length 12°5 millim.

Body slender. Head rounded, black ; the face slightly whitish ; front as broad as the eyes, with parallel sides ;

cheeks narrow. Antenne black; third joint twice as long as the second; arista microscopically

pubescent. Thorax, scutellum, and abdomen shining black; abdomen cylindrical, attenuated towards the

base; anal segment with a pair of filiform, apparently jointed, appendages beneath. Legs elongate ;

hind tibie slightly curved, very thin at the base, but gradually enlarged towards the tip; middle tibie

with a strong spur. Halteres yellow. Wings broad, very glossy, hyaline; the costa to the end of the

first vein and the apical third black; auxiliary vein coalescent with the first vein; terminal section of the

third and fourth veins nearly parallel; small cross-vein a little beyond the middle of the discal cell;

posterior cross-vein curved ; third basal cell rounded at the tip.

Hab. Panama, Volcan de Chiriqui 3000 feet (Champion).

A single male specimen. The species is closely allied to, and perhaps not different

from, M. niger, Schin. (Dipt. Novara Reise, p. 256), from South America. Schiner,

however, explicitly says: “thorax and scutellum not shining, the antenne brownish,

and the arista yellowish,” whilst the example before me has the whole body shining

and the antenna, including the arista, black.

RICHARDIA.

Richardia, Robineau-Desvoidy, Essai sur les Myodaires, p. 728 (1830).

Of this genus four species are represented in the Mexican collections before me :—

l. Fore coxe black. 2. 6 6 we we ee ee ee ee

Fore coxe yellow . .... . . . . oe ew ee BD

2. Abdomen steel-blue ; median band of the wings attenuated towards the

hind margin . . . Soe ee ee ee ee we we .) podagrica, Fabr.

Abdomen metallic black, the first segment rufous; median band of the

wings not attenuated posteriorly . . .. . - . « « viridiventris, v. d. W.

3. The brown apical spot of the wings large, reaching the end of the second

vein; basal segment of the abdomen rufous in the male. . . . . elegans, v. d. W.

The brown apical spot of the wings small, not reaching the second vein;

basal segment of the abdomen not rufous. . . . . . . . . . concinna, v. d. W.

1. Richardia podagrica.

Dacus podagricus, Fabr. Syst. Antl. p. 272°.

Cordylura podagrica, Wiedem. Aussereur. zweifl. Ins. 11. p. 445, t. 10 a, fig. 5 (not 9, as in the text) *,

Richardia podayrica, Macq. Dipt. Exot. 11. 3, p. 205, t.. 27. fig. 8°; Rond. Stud. Ent. i. p. 82°;

Gerst. Stett. ent. Zeit. xxi. p. 163°; Schiner, Reise der Novara, Dipt. p, 259°.

Richardia saltatoria, Rob.-Desv. Essai sur les Myodaires, p. 728’.

BIOL. CENTR.-AMER., Dipt., Vol. I., February 1899. 3d

386 DIPTERA.

Hab. Mexico, Presidio de Mazatlan (Forrer), Dos Arroyos, Tierra Colorada, and

R. Papagaio, all in Guerrero, Atoyac in Vera Cruz (H. H. Smith) —Sovutu America},

Guiana ?; Braziu 2.

A long series of specimens of both sexes. The males agree in the dark colour of

the face, antennw, and fore legs with Wiedemann’s description. The females have the

head, antenne, and anterior femora inclining to yellowish-rufous, the anterior femora

often with a more or less extended black spot or stripe. In both sexes the coxe,

including the anterior pair, are black. I have no doubt that the females mentioned

by Schiner (loc. cit.) belong to the same species. The first abdominal segment is not

rufous, as in some of the following species, though it shows a slight tendency to become

so; and in this respect there is a discrepancy with Wiedemann’s and Fabricius’s

descriptions, where the basal segment is explicitly stated to be rufous.

The median band of the wings is distinctly attenuated towards the posterior margin ;

the apical spot does not reach the end of the second vein.

2. Richardia viridiventris, sp. n., 3 2.

Thorax black, with some whitish markings; abdomen greenish-black, the first segment rufous; all the coxe

black.

Length 6°5 millim.

Front brownish-testaceous, the sides blackish ; vertex and occiput shining black; face blackish, with grey

dust ; oral margin rufous. Antenne brown, third joint elliptical, three times as long as the second;

arista finely plumose. Proboscis and palpi rufous. ‘Thorax black, with a median stripe and lateral spots

whitish ; pleurz very shining, before the wings with an oblique whitish band; scutellum and metanotum

shining black. Abdomen elongate, slightly attenuated at the base, shining black, with a greenish-

metallic reflection, and with a short, brown pilosity ; the first segment short, yellowish-rufous, this rufous

colour often more or less prolonged along the ventral side; the second segment much longer than the

others and bearing on each side a pair of long bristles. Legs rather elongate; hind femora incrassated,

inferiorly spinose ; coxw and femora black, the middle femora rufous towards the tip, the hind femora

with the base and a ring before the tip rufous; tibize and tarsi yellowish-rufous, the front tibia and the

terminal two or three tarsal joints often infuscated ; the hind tibie straight. Halteres yellow. Wings

greyish-hyaline, with a broad brown median band, including the two cross-veins, and a brown apical

spot, which does not reach the end of the second vein. In the females the bead and antenne are

somewhat clearer in colour and more rufous; the tip of the antenne, however, is brown.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

Several male and two female specimens. This species is closely allied to R. podagrica.

The abdomen is not steel-blue, but greenish-black, with the first segment rufous; the

cross-veins are a little more distant and the brown median band is hardly narrower

towards the hind margin.

8. Richardia elegans, sp.n., ¢ 2. (Tab. X. fig. 17.)

Thorax testaceous; scutellum black; abdomen steel-blue, the first segment rufous in the ¢; head, antenne,

and legs yellowish-rufous, the hind femora with a brown ring; apical spot of the wings large, reaching

the end of the second vein.

Length 6 millim.

RICHARDIA.—PANERYMA. 387

Front as broad as the eyes, rufous, with white lateral borders; face and cheeks pale yellow; occiput rufous.

Antenne rufous; the third joint elliptical, on the fore side slightly infuscated; arista finely plumose.

-Proboscis and palpi pale rufous. Thorax greyish-testaceous, with indistinct dorsal stripes; pleure,

scutellum, and metanotum shining black; a greyish oblique band extends from the shoulders to the

middle coxe, and there is a similarly coloured band above the hind cox. Abdomen subcylindrical (¢),

or ovate and attenuated towards the tip ( @ ), clothed with brown hairs, which are numerous in the male;

the first segment rufous (less distinctly so in the 9); the following segments bright steel-blue, with

some violet reflections; the second segment with long lateral bristles; ovipositor of the female flattened,

pointed, black, rufous towards the tip. Fore coxe pale yellow; middle and hind coxe shining black.

Legs yellowish-rufous ; hind femora with the tip and a ring behind the middle brown; the base and tip

of the tibiz also brown; tarsi infuscated towards the apex; the femora hairy beneath, the hind pair with

short spines towards the tip; hind tibie curved. Halteres yellow. Wings greyish-hyaline; the brown

median band rather narrow; the apical spot large, reaching from the end of the second vein to the end of

the fourth vein.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

Several specimens of both sexes.

4, Richardia concinna, sp.n., ¢ @. (Tab. X. fig. 18, wing.)

Thorax testaceous; scutellum rufous; abdomen steel-blue; head, antenne, and legs yellowish-rufous ; hind

femora with a brown ring; apical spot on the wings small, not extended to the second vein.

Agreeing with the preceding (2. elegans) and of. equal size, but differing from it in the smaller apical spot on

the wings and in the rufous (not black) scutellum and metanotum; the first abdominal segment is not

rufous; the lower portion of the pleure and the middle and hind coxe are shining black; the band

extending from the shoulders to the middle coxe is yellow; the second vein is not straight, but curved

towards its termination.

Hab. Mexico, Santiago Iscuintla (Schumann: 3 ), Acaguizotla in Guerrero 3500 feet

(H. H. Smith: @ ).

Two specimens.

PANERYMA*, gen. nov.

This genus is nearly allied to Richardia, but differs from it in some essential points.

The abdomen is proportionately longer and more cylindrical, though somewhat

attenuated at the base; the hind femora are not incrassated and are much longer than

the others; the third and fourth veins are nearly parallel, and the cross-veins are less

approximated. Paneryma thus forms a peculiar type amongst the group of genera

allied to Richardia, equivalent to Celometopia of Macquart and Cyrtometopa, Steno-

macra, Syntares, Euolena, Idiotypa, Steneretma, and Hemixantha of Low, which also

have the hind femora not incrassated, as in Richardia, Rob.-Desv.

The Mexican species referred to it cannot be included in any of the genera mentioned

by Low (Monogr. Dipt. N. Amer. iii.).

* rarépnpos, abandoned.

388. DIPTERA.

1. Paneryma elongata, sp.n. ¢ 2. (Tab. X. fig. 19.)

Black; head testaceous; legs rufous, the femora partly blackish; wings hyaline, with a median band, and a

border at the base of the costa and another at the tip, brown. ‘

Length 7 millim.

Head rounded; front as broad as the eyes, rufo-testaceous, the upper portion and the ocelli shining black ; two

ocellar and four postvertical bristles; face testaceous, the oral margin slightly projecting, and above it

there is a black transverse band; occiput greyish. Antenne rufous; the third joint three times as long as

the second, and, with the exception of the base, brown. Thorax black, covered with a whitish dust, which

gives it a greyish appearance ; the humeral callosities rufous ; scutellum black ; metanotum grey. Abdomen

black, with a short whitish pubescence; male genitalia inferiorly with two club-shaped appendages ;

basal joint of the ovipositor of the female broad, flattened, shining black, the second and third joints

rufous, the third pointed. Legs yellowish-rufous; the fore and middle femora from the base to the

middle blackish ; hind femora with a broad, blackish median ring, on the underside towards the apex

with short black spines. Halteres yellow. Wings hyaline; the basal half of the costa, including the

mediastinal cell, brownish ; beyond the middle a rather broad brownish cross-band, covering both cross-

veins, but not reaching the costa, and a narrow brownish border at the tip, extending from the end of the

second to the end of the fourth vein.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

Three males and one female.

CYRTOMETOPA.

Cyrtometopa, Liéw, Monogr. Dipt. N. Amer. iii. p. 179 (1873).

The generic name Cyrtometopa has been substituted by Low for Odontomera, Macq.,

because there was a genus Odontomerus, Grav., among the Coleoptera. The typical

species is Odontomera ferruginea, Macq., from an unknown locality *. Macquart

placed the genus in his group Tephritide (=Trypetinz), and according to him it

formed a transition between them and the Ortalide. Low correctly included it among

these latter. .

This genus is allied to Richardia, but differs from it in having the femora not

incrassated (though they are spinose beneath) and the cross-veins less approximated

(the small cross-vein being nearly in the middle of the discal cell), as well as in the

general rufous coloration of the body and the absence of a dark median band on

the wings. Loéw mentions (J. c.) as an important character, “the front very much

projecting in profile” (from which he derived the new name); but as he did not know

the species itself, he has evidently taken this peculiarity from Macquart’s figure of the

head, where the front is represented much too prominent, although it must be observed

that owing to the deep excavation of the face the front appears to project.

In the Mexican collections before me two species are represented, including the

typical C. ferruginea :—

Scutellum rufous, at the most with a blackish spot on each side; hind femora

uniformly rufous... ew eee ee ee ew ww ee <Serruginea, Macq.

Scutellum black; hind femora with a blackish ring. . . . . . . . « cinctella,v.d. W.

* A second species, Odontomera maculipennis, Macq. (Dipt. Exot. Supp. 1, p. 211), is not congeneric, but,

according to Low, probably belongs to the genus Celometopia, Macq. °

CYRTOMETOPA.—STENOMACRA., 389

1. Cyrtometopa ferruginea.

Odontomera ferruginea, Macq. Dipt. Exot. ii. 8, p. 215, t. 29. fig. 6.

Rufous; scutellum usually with a blackish spot at the sides; wings yellowish, a narrow band near the base,

a narrow border on the small cross-vein, and an apical spot, brown.

Length 4-5-6°5 millim.

Of slender shape and a general rufous coloration. Front broader than the eyes; face deeply excavated ;

cheeks rather narrow ; occiput swollen. Antenne not reaching the oral margin; third joint three times

as long as the second, infuscated at the tip; arista pubescent. Proboscis and palpi rufous, the proboscis

short and thick. Thorax ovate; scutellum small, with two bristles, often with a blackish spot on each

side. Abdomen attenuated at the base, curved downward; second and following segments sometimes

with a brown hind border, or the whole abdomen brownish (result of exsiccation ?); on each side of

the second segment a long bristle; male genitalia slightly prominent; ovipositor of the female broad,

flattened, truncated. Legs rufous; sometimes the tibie and the front tarsi brownish; the middle and

hind tarsi pale yellow; base of the hind tibic often a little infuscated; the legs are very slender, the

middle and hind femora elongate, all the femora inferiorly spinose, the middle and hind tibiae with a spur.

Halteres yellow. Wings yellowish-hyaline ; a narrow brown band near the base, extending from the

end of the mediastinal cell to the end of the second basal cell; the apical spot does not reach the end of

the second vein ; the small cross-vein narrowly bordered with brown; in a few specimens the posterior

cross-vein has some indication of a similar border. The auxiliary vein and the first vein terminate close

together in the costa, at a little before the basal third of the length of the wing and much before the

small cross-vein ; third and fourth veins slightly convergent towards the tip; small cross-vein a little

beyond the middle of the discal cell; the second and third basal cells truncated.

Hab. Mexico, Cuernavaca in Morelos, Medellin and Atoyac in Vera Cruz

(Hl. H. Smith).

Several specimens of both sexes.

2. Cyrtometopa cinctella, sp.n. (Tab. X. figg. 20; 204, head in profile.)

Rufous; scutellum black ; hind femora with a blackish ring ; pattern of the Wings as in C. ferruginea.

Length 5-7 millim.

Closely allied to C. ferruginea and agreeing with it in most respects, but generally of somewhat larger size.

The scutellum, however, is wholly black, and the hind femora have a blackish ring just before the middle.

In most of the specimens the dorsal surface of the abdomen is more or less chestnut-brown or has

brownish hind borders to the segments; in one of them (a large female) nearly the whole abdomen,

including the ovipositor, is shining black.

Hab. Mexico, San Lorenzo, near Cordova (MM. Trujillo), Teapa in Tabasco

(H. H. Smith).

Several specimens of both sexes.

STENOMACRA.

Stenomacra, Low, Monogr. Dipt. N. Amer. iii. p. 180 (1873).

1. Stenomacra guerini. (Tab. X. fig. 21, wing.)

Sepsis gerinii (sic), Bigot, in Ramon de la Sagra’s Hist. fis. polit. y nat. de Cuba, Ins. p. 346, t. 20.

figg. 9, 9a-c’.

Stenomacra guerini, Low, Monogr. Dipt. N. Amer. iii. p. 180, t. 9. fig. 257%.

390 . DIPTERA.

Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith).—AntILuzs,

Cuba ? 2,

Two males and one female. They agree with the ample description of Low, except

that in the male specimens the fore legs do not show any infuscation.

AUTOMOLA.

Automola, Léw, Monogr. Dipt. N. Amer. ii. p. 118 (1878).

1, Automola atomaria. (Tab. X. fig. 22, wing.)

Ortalis atomaria, Wiedem. Aussereur. zweifl. Ins. ii. p. 461°.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).—Braziu.

Two male specimens. Wiedemann’s description is fully applicable to the Mexican

specimens: they have the legs rufo-piceous, and thus agree with the variety mentioned

by him, but the wings are coloured as in his type.

The tibie of this species and of the closely allied J. trifasciata, Wied., have a

preapical bristle, which is generally absent in the Ortaline. Both species possess all

the other characters of this group, and they cannot be placed in any other.

AMPHICNEPHES.

Amphicnephes, Léw, Monogr. Dipt. N. Amer. i. p. 83 (1878).

1, Amphicnephes stellatus, sp.n.,3 9. (Tab. X. fig. 23, wing.)

Shining black; thorax with bluish reflections; wings black, hyaline at the tip and with hyaline dots.

Length 4 millim.

Front brown, fully as broad as the eyes and with parallel sides; face blackish, excavated; clypeus shining

black. Antenne rufous, elongate, reaching to near the clypeus; third joint slightly attennated towards

the tip; arista microscopically pubescent. Proboscis and palpi thick, blackish. Thorax shining bluish-

black ; scutellum with four bristles, black, flattened, finely punctured, truncated behind. Abdomen ovate,

shining black, punctured ; ovipositor of the female slender. Legs black ; the first joint of the middle and

hind tarsi pale yellow. Halteres black. Wings broad, rounded at the apex, blackish, with a rather large

hyaline patch at the tip and several hyaline dots; four of these dots along the costa are a little larger

than the others, the first of them being placed at the end of the first vein, with a smaller one under it in

the cubital cell, the second forming the commencement of a transverse row of dots; there are also several

small dots in the basal cells and their neighbourhood ; small cross-vein on the middle of the discal cell,

which is very broad; posterior cross-vein straight and long; third and fourth veins parallel; the third

basal cell shorter than the second, and closed by a rounded cross-vein.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith), Northern Yucatan

(Gaumer).

Two males and two females. This species differs from A. obtusus, Low, by having

the tip of the wing broadly hyaline (not black, with a hyaline cross-band), and by the

want of clear dots in the central portion of the wing. I have no doubt that A. obtusus

is synonymous with Trypeta pulla, Wiedem. (Aussereur. zweifl. Ins. ii. p. 506).

. TETANOPS. 391

Tetanops, Fallén, Ortalide, p. 2 (1820).

TETANOPS.

In the Mexican collections before me two species of this genus are represented :—

Front with four blackish stripes, the sides cinereous, distinctly black-

punctured . 2 w/e ee ee vittifrons, v. d. W.

Front rufous, with two red stripes, the sides less distinctly punctured . . . rufifrons, Vv. d. W.

1. Tetanops vittifrons, sp.n.,g 9. (Lab. X. figg. 24; 24, head in profile. )

Cinereous, black-punctured ; front with a rufous median band and four blackish stripes; abdomen black ;

antenne and legs rufous, the femora blackish; wings with brownish spots on the costa.

Length 6 millim.

Front prominent, broader than the eyes, cinereous, with four blackish stripes and a rufous median band; the

cinereous portions distinctly black-punctured ; the orbits of the eyes white ; face pale rufous, with four

black spots—two, lateral, on the cheeks near the eyes and two on the inner side of the facial ridges; eyes

oval; beneath them on the cheeks a small, perpendicular, black stripe; occiput dark rufous, blackish

behind the eyes. Antenne rufous, porrect; third joint elliptical, more than twice as long as the second.

Proboscis black; palpi rufous. Thorax without bristles, cinereous, black-punctured, anteriorly with

indications of two blackish stripes; scutellum blackish, sometimes slightly rufous, its hind border with

two very short bristles. Abdomen black or blackish-cinereous, finely granulate; ovipositor of the female

shining black, flattened, broad, attenuated towards the tip. Coxe and femora blackish, the femora at the

tip, the tibie, and tarsi yellowish-rufous; the two or three terminal tarsal joints infuscate. Halteres

yellow. Wings greyish-hyaline, with some more or less distinct, brownish spots on the costa—the first

at the base, the second reaching beyond the origin of the cubital cell, the third at the end of the medi-

astinal cell, and the fourth at the tip of the wing ; third and fourth veins parallel; small cross-vein beyond

the middle of the discal cell.

Hab. Mexico, Jalisco (Schwmann), Chilpancingo and Amula in Guerrero, Cuernavaca

in Morelos (H. H. Smith).

Four males and three females. This species is closely allied to 7. duridipennis, Low

(Monogr. Dipt. N. Amer. iii, p.119); but it has clearer wings, with more distinct costal

spots, and rufous tibiee (in 7’. (wridipennis the fore and hind tibie are infuscate). ‘The

black frontal stripes are very conspicuous.

2. Tetanops rufifrons, sp.n.,¢. (Tab. X. tig. 25, head.)

Thorax cinereous, black-punctured ; head, antenne, and legs rufous, the femora sometimes infuscate in the

middle; abdomen blackish ; wings with brownish costal spots.

Length 5-5°5 millim.

In most respects agreeing with the preceding, but differing from it in the clearer coloration of the head and

legs. The front is rufous, the sides punctured, but less distinctly than in 7’. vittifrons; the median band

is without punctuation and bordered on each side by a dark red stripe; face with two black spots on the

ridges; the spots near the eyes are absent; the dark stripe under the eyes is less distinct. The legs,

including the coxmw, are rufous; in some specimens the femora have a more or less conspicuous blackish

band in the middle. .

Hab. Mexico, Presidio de Mazatlan (forrer), Chilpancingo in Guerrero 4600 feet

(H. H. Smith). .

Several specimens, all females.

392 DIPTERA.

ANACAMPTA.

Anacampta, Léw, Monogr. Dipt. N. Amer. iii. p. 129 (1878).

1. Anacampta latiuscula. (Tab. X. fig. 26, wing.) [7

Anacampta latiuscula, Low, Monogr. Dipt. N. Amer. iii. p. 130, t. 8. fig. YO’.

Hab. Nortn America, California 1—Mextico, Mexico city (H. H. Smith).

A single male specimen.

OSTRACOCCELIA.

Ostracocelia, Giglio-Tos, Bollett. dei Mus. di Zool. di Torino, viii. no. 147, p. 10 (1893).

1. Ostracocelia mirabilis. (Tab. X. figg. 27, 27a, 3, 28, 9, wings.)

Ostracocelia mirabilis, Gigl.-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 44, fig. 137.

Hab. Mexico, Chilpancingo and Omilteme in Guerrero, Atoyac in Vera Cruz

(Hl. H. Smith), Tampico }.

Two males and two females. They agree very nearly with the ample and clear

description which Dr. Giglio-Tos has given of this interesting genus and species.

I must observe, however, that the specimens before me are of smaller size, their

length being no more than 7 millim., one of the females measuring barely 6 millim.

(Giglio-Tos gives 9 millim.). Moreover, the blackish pattern at the base of the

wings is more or less interrupted by small hyaline spots, which are not mentioned

in the description of the author nor represented in his figure. The markings of the

wings, however, seem to vary individually; I therefore give a figure of the wing

from three different specimens.

In the very striking curvature of the costa and of the second vein the genus

Ostracocelia shows some affinity with the North-American Cemptoneura picta, Fabr.,

but it differs from that insect in having the antenne much shorter, the cross-veins not

approximate (the small cross-vein being on the middle of the discal cell), and the

femora somewhat incrassate.

XANTHACRONA®, gen. nov.

Front as broad as the eyes, short-haired ; vertex with some bristles; face excavated, slightly prominent at the

oral margin. Antenne short, reaching to half the length of the face; third joint elliptical; arista thin,

with hardly perceptible pubescence. Proboscis thick; palpi short. Scutellum much swollen, with two

bristles. Abdomen as broad as the thorax; ovipositor of the female flattened, somewhat cordiform. Legs

rather short ; femora not inerassated. Wings longer than the abdomen; first vein ending beyond the

middle of the costa, the mediastinal cell being very large; second vein distinctly sinuous ; third and fourth

veins nearly parallel; cross-veins approximated and oblique ; third basal cell inferiorly pointed, though

not drawn out in a lobe. .

* £avOds, yellow ; axpor, costa.

XANTHACRONA.—PTEROCALLA. 393

This genus is closely allied to Myennis, Rob.-Desv., but differs from it in having the

second vein more strongly curved, and the scutellum with two (instead of four) bristles,

as well as in the rufous coloration.

1. Xanthacrona bipustulata, sp. n.,¢. (Tab. X. figg. 29; 29a, head in

_ profile.)

Rufous ; scutellum with two black spots; abdominal segments with brownish hind-borders ; wings hyaline,

the costa and apex bordered with yellow and brown, a brown oblique band over the cross-veins.

Length 5 millim.

- Rufous, the head yellowish, the pleure and abdomen slightly shining. Antenne, proboscis, and palpi

rufous. Thoracic dorsum with greyish dust; scutellum swollen, especially on a shining black spot in

each side. Hind-borders of the abdominal segments brownish. Legs yellowish-rufous. Halteres yellow.

Wings hyaline, with a rather broad yellow costal border, which covers the subcostal cell and is prolonged

at the tip of the wing to beyond the fourth vein, where it is infuscated and terminates in a point; at the

end of the auxiliary vein is a brown spot, and there is a similar spot at the end of the first vein; in

the subcostal cell, above the small cross-vein, is a small, oblique, brownish stripe; the base of the first

basal cell, the basal half of the cubital cell, and a cross-band obliquely covering the cross-veins, are also

brownish.

Hab. Mexico, Presidio de Mazatlan (Forrer).

A single female specimen.

PTEROCALLA.

Pterocalla, Rondani, Studi Entom. p. 83 (1848).

This interesting genus is represented in the Mexican collections before me by five

_ species, of which three are treated as new :—

1. Apical portion of the wings yellowish; the fuscous portion without black

stripes or dots; first basal cell with a row of hyaline spots. . . . ~ fenestrata, v. d. W.

Apical portion of the wings not yellow ; the fuscous portion reticulated

or with many black stripes and dots; no hyaline spots in the first

basalcell . 2 0. ee ee ee

2. The wings with four white eye-like spots before the tip—one in the cubital,

and three in the first posterior cell,—the eye-like spots placed in an

oblique quadrangle; discal cell without black stripes or dots . . . . guadrata, v. d. W.

The wings with three white eye-like spots before the tip—one in the

cubital and two in the first posterior cell; discal cell spotted or

reticulated. 2 6 6 2 ee et

3. Cubital cell without black spots beyond the eye-like spot; the end only of

Cubital cell with one or more black spots beyond the eye-like spot . . . 4,

4. End of the second vein not infuscated ; cubital cell with a single black spot

beyond the eye-like spot; the fuscous portion of the wings with black

stripes and dots (in the male the central portion of the wings is much

BIOL. CENTR.-AMER., Dipt., Vol. IL., September 1899. 3

ocellata, Wiedem.

394 | DIPTERA.

clearer, and the second and following joints of the hind tarsi are

dilated). 2. 2. 6. 1 1 ee ee ee ee ee

End of the second vein with a black spot; cubital cell with three black

spots beyond the eye-like spot; the fuscous portion of the wings not

spotted, but reticulated (in the male the costa is enlarged at the middle). cosfalis, v. d. W.

tarsata, Schin.

1. Pterocalla fenestrata, sp.n.¢ 92. (Tab. X. fig. 30, wing.)

Brownish-cinereous, black-punctured; antenne and legs rufous; wings fuscous, the apical portion yellowish,

with three hyaline eye-like spots; a row of hyaline spots in the first basal cell.

Length 4-5 millim.

Head yellowish-cinereous ; front short-haired, as broad as the eyes, slightly attenuated towards the points of

insertion of the antenne, with three brown dots on each side; bristles on the vertex only; the orbits

of the eyes whitish. Antenne brownish-rufous; third joint longer than the basal joints, reaching to a

little beneath the middle of the face; arista microscopically pubescent. Proboscis brown; palpi black.

Thorax, scutellum, and abdomen dark cinereous, black-punctured, the punctuation on the thorax here and

there becoming closer and forming small spots, and on the abdomen more regular spots on the front

borders of the segments; ovipositor shining black, terminating in a fine point. Legs yellowish-rufous,

the femora more brownish. Halteres yellow. Wings with more than their basal half fuscous, the

remaining portion yellowish, the fuscous coloration not covering the subhyaline basal part of the hind

margin; on the costa are two hyaline spots—one, punctiform, at the end of the auxiliary vein, the other,

larger and somewhat trigonal, at the end of the first vein; in the yellow portion are three rounded hyaline

eye-like spots, these having a brown outline—one in the cubital cell and two in the first posterior cell; in

the first basal cell is a row of rounded hyaline spots; the small cross-vein with a narrow hyaline border ;

at the end of the second and third veins there are some small brown spots: the external eye-like spot in

the first posterior cell is connected by a brown, oblique stripe with the end of the fourth vein; second

vein undulate towards its end; fourth vein slightly curved.

Hab. Mexico, Atoyac in Vera Cruz and Teapa in Tabasco (H. H. Smith).

Two males and two females.

2. Pterocalla quadrata, sp.n. ¢. (Tab. XI. fig. 1, wing.)

Cinereous, black-spotted and punctured ; antenne and legs rufous; wings fuscous, with many black stripes

and spots, the hind margin, two small costal dots, and four eye-like spots quadrangularly arranged near

the tip, hyaline.

Length 4 millim.

Front short-haired, a little broader than the eyes, slightly narrower towards the points of insertion of the

antenne, cinereous, with some black dots in two transverse rows; on the vertex some weak bristles ;

face whitish-grey. Antenne brownish-rufous; third joint short-ovate, nearly rounded; arista micro-

scopically pubescent. Proboscis brown; palpi rufous. Thorax and scutellum cinereous, with blackish

points and dots, the latter forming a row along the sides and round the scutellum, and stripes on the

pleurze; abdomen also cinereous, black-punctured, with a row of black spots on the front borders of the

segments ; ovipositor shining black, terminating in a point. Legs yellowish-rufous ; the fore and middle

femora brownish ; the hind femora brown at the base, and with a brown spot on the outer side before

the tip. Halteres yellowish. Wings fuscous, with the hind margin hyaline, the hyaline border undulate

and several times incised; the fuscous portion with many black spots, these being somewhat irregular

along the costa—in the cubital cell they form a row of small dots and in the first basal cell a row of

transverse stripes (in the discal cell they are wanting); there are two small hyaline dots on the costa,

at the termination of the auxiliary and first veins; near the tip of the wing are four eye-like spots in

an oblique quadrangle—one in the cubital cell and three in the first posterior cell; the small cross-vein

PTEROCALLA. 399

with a narrow hyaline border; second vein slightly undulate near its end; fourth vein undulate beyond

the small cross-vein.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

8. Pterocalla ocellata. (Tab. XI. fig. 2, wing.)

Dictya ocellata, Fabr. Syst. Antl. p. 330°.

Trypeta ocellata, Wiedem. Aussereur, zweifl. Ins, ii. p. 495°.

Platystoma ocellata, Macq. Dipt. Exot., Supp. 1, p. 206, t. 18. fig. 4°.

Pterocalla ocellata, Rond. Studi Entom. pp. 86, 102 (1848)‘; Schiner, Dipt. Novara Reise, p. 286 *s

Gigl.-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 40°.

This species, which may be regarded as the type of the genus, is of somewhat larger size than the two

preceding (Wiedemann gives 23 lines, the Mexican specimen before me is 6 millim. in length). The

yellowish-grey front has no black dots, but two indistinct rufous stripes; the antenne are brownish-

rufous, the third joint oval, darker towards the tip; the arista is microscopical pubescent. The thoracic

dorsum is not punctured, yellowish-grey, with two indistinct brownish stripes; on the sides of the

thorax and round the scutellum are small black dots, each emitting a bristle; pleura with blackish

stripes. The fuscous coloration of the wings does not reach the hind margin, its outline there being

several times incised; in the whole central part, and also in the discal cell, are numerous black transverse

stripes, but they are wanting in the large mediastinal cell; near the tip of the wing are three eye-like

spots—one in the cubital cell and two in the first posterior cell, the latter placed close under the third

vein; the second vein near its end and the fourth vein beyond the small cross-vein are distinctly

undulate.

Hab. Mexico ®, Atoyac in Vera Cruz (H. H. Smith).—Sovuta America 12°, Colombia °,

Brazil ¢.

A male of this species has been received from Atoyac.

4. Pterocalla tarsata. (Tab. XI. figg. 38, wing, ¢; 4, wing, 2 .)

Pterocalla tarsata, Schiner, Dipt. Novara Reise, p. 287'; Gigl.-Tos, Mem. R. Accad. Sci. di

Torino, ser. 2, xlv. (sep.) p. 40°.

This species is easily recognizable by the peculiar form of the hind tarsi in the male. Giglio-Tos remarks that

the four dilated joints, as well as the terminal one, are silvery. The broad clearer central streak in the

wings of the male is absent or scarcely indicated in the female. The thorax and abdomen are black-

punctured; on the hind border of the thorax is a row of black dots, and there is a similar row of dots on

the front borders of the abdominal segments; the first joint of the ovipositor of the female is broad,

cinereous, and black-punctured, the second and third joints being shining black, cylindrical, and very

thin. Halteres yellowish. ‘The black spots and stripes in the fuscous portion of the wings are arranged

in rather regular rows, and they extend over the discal and first posterior cells; the three eye-like spots

are placed triangularly—two of them in the first posterior cell in an oblique direction to each other, the

internal one just above the fourth vein, the outer one close under the third vein; the mediastinal cell is,

especially in the male, very large, and reaches far beyond the small cross-vein ; the second vein towards

its end and the fourth vein beyond the small cross-vein are undulate.

Hab. Mexico ?, Teapa in Tabasco (H. H. Smith) —Soutu America }.

Several specimens of both sexes.

36%

396

Cinereous, black-punctured; front, antenne, and legs rufous;

DIPTERA.

5. Pterocalla costalis, sp.n.,¢ 9. (Tab. XI. figg. 5, wing, ¢; 6, wing, 2.)

wings fuscous, reticulated, with the hind

margin, two or three small costal dots, and three eye-like spots near the tip, hyaline, the costa enlarged

in the middle in the male.

Length 5 millim.

Front short-haired, dark rufous, as broad as the eyes, enlarged towards the vertex, with some brown dots ;

face yellowish-grey ; orbits of the eyes whitish. Antenne brownish-rufous; third joint oval; arista

microscopically pubescent. Proboscis and palpi brown. Thorax, scutellum, and abdomen brownish-

cinereous, black-punctured and spotted, nearly in the same manner as in P. guadrata. Legs yellowish-

rufous; femora with two brown spots on the outer side; tibie with two brown rings. Halteres yellowish.

Wings fuscous, the hind margin subhyaline; the outline of the dark coloration undulate and incised in

several places; a black double spot at the end of the second vein and some other spots near the tip of

the wing; the rest of the fuscous portion not black-spotted and striped, as in P. ocellata and other

species, but reticulated, and with many less obscure dots, which are mostly rounded and in regular rows

between the veins; there are two or three hyaline dots on the costa and three eye-like spots near the tip,

these latter arranged as in P. ocellata. In the male the middle of the costa is enlarged, the mediastinal

cell thus becoming very broad, though not reaching beyond the small cross-vein ; the second vein towards

its end and the fourth vein beyond the small cross-vein are distinctly undulate.

One male and one female.

EUXESTA.

Euzesta, Low, Berl. ent. Zeitschr. xi. p. 297 (1867).

two only of which appear to have been described :-—

. Abdomen reddish-brown, with the sides only metallic:

Face not metallic 2. 2... we ee

Face metallic (wings with four more or less complete cross-bands)

. Wings with only two costal spots; legs rufous; head much broader

than high . . . soe . toe

Wings with four cross-bands, the first, second, and fourth abbreviate ; ;

legs blackish; head of usual shape, not broader than high . . . .

Second and third cross-bands much enlarged towards the posterior

margin . . . . Lo

Second and third cross-bands + not or but little enlarged towards the

posterior margin. . . -

Legs rufous ; the fourth cross-band on ‘the tip of the wing br oader than

the hyaline space between the third and fourth cross-bands .

Legs black ; the fourth cross-band on the tip of the wing narrower than

the space between the third and fourth cross-bands . . ... .

. The third and fourth cross-bands separated, or at most united by a

very narrow infuscation at the costal vein .

The-third and fourth cross-bands connected at the costa . .

larger species

(length 75 millim.). 2. 2... 1 1 we ee ees

Abdomen metallic blackish-green : smaller species (length 4 millim.) .

. Head with a velvety-black spot between the antenne . . .

Head without a black spot between the antenne . . . ... .

Hab. Mexico, Chilpancingo and Amula, both in Guerrero (H. H. Smith).

Hight species of this genus are represented in the Mexican collections before me,

laticeps, v. d. W.

nigricans, v. d. W.

latifasciata, v. d. W.

fascipennis, v. d. W.

major, v.d. W.

alternans, Low.

stigmatias, Low.

conserta, v. d. W.

EUXESTA. 397

1. Euxesta laticeps, sp.n., ¢. (Tab. XI. figg. 7, wing; 7 @, head seen from

in front; 7 6, head in profile.)

Greenish metallic; head very broad; front and legs rufous; wings hyaline, with two costal spots.

Length 4°5 millim.

- - Head, seen from in front, much broader than high; front yellowish-rufous, in the middle with a transverse

groove, the orbits of the eyes narrowly white ; ocellar spot greenish-black ; face short and broad, nearly

white ; clypeus rufous; upper part of the occiput, behind the eyes, metallic green. Antenne dark

rufous; third joint rounded. Proboscis black. Thorax, scutellum, and abdomen metallic blackish-

green, somewhat coppery ; the flattened first joint of the ovipositor metallic black, the aculeate second

and third joints rufous. Fore legs rufous, with the base of the coxe, femora, and tibie, the apical third

of the tibie, and the whole tarsi, blackish; middle and hind legs rufous, with the coxe metallic black

and the tip of the tibie and the tarsi, save the basal joint, infuscate. Wings hyaline, with yellowish

veins and two blackish costal spots—one at the end of the mediastinal cell, the other subapical at the

end of the second vein and extended to the third vein; last section of the fourth vein converging with

the third vein.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

A single female specimen. This insect must be closely allied to L. spoliata, Low ;

but as it differs in the coloration of the legs, and the peculiar shape of the head is not

mentioned in the description (Low merely states that the face is unusually short), it

cannot be referred to that species.

Ortalis platystoma, Thoms. (Dipt. Eugenie’s Resa, p. 572), from Panama, certainly

belongs to the genus Euvesta, and agrees with it in the enlarged head, the general

coloration, and the pattern of the wings. It appears to differ from &. lateceps in

having two green points on the sides of the front, and the hind femora blackish at

the tip.

2. Huxesta nigricans, sp.n.,g. (Tab. XI. fig. 8, wing.)

Blackish; pleure with metallic reflections; antenne dark rufous; legs black, the hind tarsi rufous; wings

hyaline, with four blackish cross-bands, the first, second, and fourth abbreviated.

Length 3°5 millim.

Head, seen from in front, rounded, not broader than high; front dark rufous, short-haired ; the vertex with

several bristles; the orbits narrowly white; face and occiput cinereous. Antenne dark rufous; third

joint rounded. Proboscis thick, brown. Thorax, scutellum, and abdomen black; the pleure greenish-

metallic. Legs black, the knees and the first joint of the hind tarsi rufous, Halteres whitish. Wings

hyaline, with four blackish cross-bands: the first near the base, reaching the first basal cell ; the second

covering the end of the mediastinal cell and also terminating in the first basal cell, a little before

the small cross-vein ; the third narrower and much longer than the second, extending as a border of the

posterior cross-vein to near the hind margin ; the fourth reduced to a subapical spot, at the end of the

second vein, and not extending beyond the third vein; third and fourth veins convergent towards the tip

of the wing.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single male specimen.

3. Euxesta latifasciata, sp. n., ¢(91). (Tab. XI. fig. 9, wing.)

Metallic bluish-black ; head, antennew, and legs rufous; wings with four blackish cross-bands, the second and

third very broad, the space between the third and fourth bands narrow.

Length 4 millim.

398 DIPTERA.

Head rounded; front a little narrower than the eyes, with parallel sides, rufous, laterally short-haired ;

face pale rufous, in the middle metallic blue; clypeus rufous; vertex metallic blue, with rather long

bristles ; occiput brownish-rufous. Antenne rufous; third joint oval. Proboscis brown. Thorax metallic

greenish-blue, the dorsal surface with some yellowish dust; scutellum bluish-black, its hind border rufous,

with two long bristles. Abdomen flattened, attenuated posteriorly, metallic greenish-blue. Legs rufous,

the middle and hind femora brownish; the tip of the hind tibie and the terminal four joints of all

the tarsi infuscate. Halteres yellow. Wings hyaline, with four blackish cross-bands: the first near the

base very small, at the humeral cross-vein ; the second and third much enlarged towards the hind margin ;

the fourth, in the form of a large spot at the tip of -the wing, broader than the hyaline space before it ;

the second cross-band is limited on its outer side by the small cross-vein ; the third cross-band covers

the posterior cross-vein ; the third and fourth veins are slightly convergent towards the tip of the wing.

Hab. Mexico, Cuernavaca in Morelos (H. H. Smith).

Two males. A female specimen from Tierra Colorada in Guerrero (//. H. Smith)

seems to belong here, the pattern of the wings being quite similar; but it has the

whole scutellum and the third and fourth abdominal segments rufous and the legs

not infuscate. It is perhaps not fully coloured. ‘The flattened basal joint of the

ovipositor is shining black; the second and third joints are lanceolate, very thin and

long, and pale rufous towards the tip.

4. Kuxesta fascipennis, sp.n., ¢ 2. (Tab. XI. fig. 10, wing.)

Metallic bluish-black ; front and antenne rufous; legs blackish; wings hyaline, with four blackish cross-

bands, the second and third much enlarged towards the hind margin, the fourth at the tip of the wing

and narrower than the hyaline space before it.

Length 3°5 millim.

Closely allied to the preceding (Z. latifasciata) and agreeing with it in most of its characters. The metallic

coloration is more obscure, but on the face it is more extended; the tip of the scutellum is not rufous ;

the abdomen is more shining black; the legs are blackish, the femora with metallic green reflections, the

base only of the tarsi rufous (in one of the specimens, perhaps a not fully coloured one, the legs are

rufous). The second and third cross-bands on the wings, though enlarged towards the hind margin, are

narrower than in E. latifasciata, and the hyaline space between the third and fourth is much broader than

the bands themselves. The apical joint of the ovipositor of the female is cylindrical and rufous.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman), Tepetlapa in Guerrero

3000 feet, Medellin near Vera Cruz, Teapa in Tabasco (/7. H. Smith).

Seven males and three females.

5. Kuxesta major, sp.n.,¢. (Tab. XI. fig. 11, wing.)

Thorax dark green; abdomen reddish-brown ; face metallic blue; wings hyaline, with four blackish cross-

bands.

Length 7-5 millim.

Front as broad as the eyes, with parallel sides, brown, immediately above the antenne rufous; vertex metallic

green, on each side of the front a double row of short bristly hairs, the ocellar and post-vertical bristles

much longer; face and clypeus metallic blue; cheeks rufous; occiput black; the posterior orbits of the

eyes whitish. Antenne rufous; third joint oval, infuscate towards the tip. Proboscis black, with

rufous terminal lips; palpi rufous. Thorax metallic blackish-green, the dorsal surface with some greyish

dust ; scutellum triangular, metallic green, with two apical bristles. Abdomen reddish-brown, the sides

of the first three segments slightly metallic, the last segments shining black. Legs dark rufous; femora,

except the base and the tip, metallic greenish-black. Halteres yellow. Wings hyaline, with four

EUXESTA. 399

blackish cross-bands: the first very small, at the humeral cross-vein ; the second much broader, at the

end of the mediastinal cell, and reaching with its outer side to near the small cross-vein ; the third

narrower, especially where it borders the posterior cross-vein ; the fourth in the form of a rather broad

border at the tip of the wing ; the third and fourth cross-bands are connected with each other by a very

narrow infuscation atthe costal vein; the hind margin of the wing is greyish; the third and fourth

veins are distinctly convergent.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman).

A single male specimen.

6. Huxesta alternans. (Tab. XI. fig. 12, wing.)

Euzesta alternans, Léw, Berl. ent. Zeitschr. xi. p. 308, t. 2. fig. 16; Monogr. Dipt. N. Amer. il.

p. 165, t. 9. fig. 16°; Gigl.-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 46°.

Hab. Mexico?, Puente de Ixtla in Morelos, Medellin and Atoyac in Vera Cruz,

Tepetlapa in Guerrero, Teapa in Tabasco (H. H. Smith).—Braz!; Cusa ®.

Five males and two females. They agree fully with Loéw’s description. The

ovipositor of the female is similar to that of the allied species; it has the cylindrical

terminal joint pale rufous. . alternans is nearly allied to EL. major, but it is of much

smaller size (length 4 millim.); the front is more rufous; the abdomen is steel-blue ;

the two median cross-bands fully reach the hind margin of the wing, and the third

and fourth cross-bands are not connected at the costa. |

7. Euxesta stigmatias. (Tab. XI. figg. 18, wing; 13a, head.)

Euzesta stigmatias, Low, Berl. ent. Zeitschr. xi. p. 310, t. 2. fig. 18’; Monogr. Dipt. N. Amer.

iii, p. 168, t. 9. fig. 17°.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman), Tepetlapa in Guerrero,

Medellin near Vera Cruz, Teapa in Tabasco (H. H. Smith).—Brazit+; Cusa ?.

Four males and three females, agreeing exactly with Low’s description. This species

is easily recognizable by the black spot between the antenne. ‘The second cross-band

of the wings is less intense beyond the fourth vein; the third cross-band is much

attenuated where it borders the posterior cross-vein, and on the costa it is fully

connected with the fourth cross-band.

8. Euxesta conserta, sp.n.,¢. (Tab. XI. fig. 14, wing.)

Metallic greenish-black; head and legs rufous; wings with four blackish cross-bands, the third and fourth

connected at the costa.

Length 3°5 millim.

Head rounded ; front rufous, as broad as the eyes, with parallel sides ; vertex metallic green ; frontal bristles

very short, the ocellar and post-vertical bristles much longer; face pale rufous, with metallic-blue

reflections. Antenns, proboscis, and palpi rufous; third antennal joint oval. Thorax, scutellum, and

abdomen metallic greenish-black. Legs dark rufous, the femora and tibia more or less infuscate ; middle

and hind coxe greenish-black. Halteres yellow. Wings hyaline, with four blackish cross-bands: the

first is very small at the humeral cross-vein, and extending to the base of the second basal cell; the

400

DIPTERA.

second is rather broad, covering the end of the mediastinal cell, and reaching with its outer side to the

small cross-vein ; the third borders the posterior cross-vein, narrowly at the inner side and broadly at

the outer side; the second and third cross-bands fully reach the hind margin of the wing; the third is

connected at the costa with the fourth cross-band, which forms a rather broad border at the tip of

the wing.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

Three male specimens.

The following species of Ortalinz have also been recorded from Mexico or Central

America :—

Rhopalomera pleuropunctata, Wiedem. Aussereur. zweifl. Ins. ii. p. 572; Gigl.-Tos,

Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 43.—Mexico and

S. America.

Rhinotora diversa, Gigl.-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.)

p. 43, figg. 25, 26.—Mexico. ;

Platystoma mexicanum, Gigl.-Tos, 1. c. p. 46, fig. 24.—Mexico.

Ortalis platystoma, Thomson, Dipt. Eugenie’s Resa, p. 572 (belongs to the genus

Huxesta, see antea, p. 397).— Panama.

—— ligata, Say, Journ. Acad. Phil. vi. p. 83; Complete Writings, i. p. 368;

Low, Monogr. Dipt. N. Amer. iii. p. 197 (may also belong to Huesta, or,

according to Léw, to Rivellia).—Mexico.

Paragorgopis maculata, Gigl.-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv.

(sep.) p. 41, fig. 12.—Mexico.

Myennis scutellaris, Wiedem. Aussereur. zweifl. Ins. ii. p. 484 (Zrypeta); Low,

Monogr. Dipt. N. Amer. i. p. 92, t. 2. figg. 26, 27, iii. p. 143; Gigl.-Tos,

Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 39.—Mexico.

Bricinnia flexivitta, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 57; Gigl.-Tos, Ll. c.

p. 45.—Mexico.

Bricinniella cyanea, Gigl.-Tos, 1. c. p. 45.—Mexico.

Pterocalla obscura, Wiedem. Aussereur. zweifl. Ins. ii. p. 499 (Trypeta); Gigl.-Tos,

l. c. p. 41.—Mexico.

bella, Gigl.-Tos, 1. c. p. 39.—Mexico.

Macrita costalis, Gerst. Stett. ent. Zeit. xxi. p. 197, t. 2. figg. 10, 10a; Léw,

Monogr. Dipt. N. Amer. iii. p. 111, t. 8. fig. 14; Bigot, Bull. Soc. Ent. Fr.

1877, p. cxxxii; Gigl.-Tos, 1. c. p. 39.—Mexico.

CGidopa elegans, Gigl.-Tos, 1. c. p. 42.—Mexico.

Acrosticta scrobiculata, Low, Berl. ent. Zeitschr. xi. p. 293, t. 2. fig. 5; Gigl.-Tos,

l.c. p. 42.—Mexico and Brazil.

The species of this group very much resemble the Ortaline, but differ from them in

having the frontal bristles reaching to near the base of the antenna, and in the want of

The end of the auxiliary vein runs in a perpendicular direction to the costa,

The wings also have, except in a few species, very

a clypeus.

where it often becomes obsolete.

TRYPETINA.

Group TRYPETINZ.

handsome markings.

The numerous Central-American Trypetine examined may be referred to the

following genera :—

10.

11.

12.

. Wings long and narrow ;

Wings with dark cross-bands or spots, sometimes blackish with

hyaline incisions, but never with a reticulated aspect

Wings reticulated with fuscous, the dark coloration interrupted by

numerous rounded, small, hyaline or clear dots

. Scutellum with six bristles

Scutellum with four, sometimes with two bristles

. Wings with dark or yellowish, rather narrow cross-bands or streaks,

which sometimes are largely interrupted aud reduced to spots

Wings blackish, with hyaline incisions .

. Fourth vein distinctly curved upwards at its end.

Fourth vein not curved upwards at its end .

. Wings with four very oblique yellowish cross-bands .

Wings with less regular, rather narrow cross-bands, which are often

interrupted or even reduced to spots .

. Incisions of the blackish coloration very large and deep, the wings

thus appearing to have large, partly connected, dark cross-bands.

Incisions of the blackish coloration small and marginal; usually a

few hyaline dots on the disc.

. Scutellum unusually swollen

Scutellum only slightly convex

. Cross-veins distant ; the small cross-vein on the middle of the discal

cell. .

Cross-veins closely approximated . Loe ee ee

second vein straight ; scutellum with two

bristles . . Soe eee ee

Wings broad, with a white apical border ; second vein undulate;

scutelium with four bristles . Se ee

Scutellum with six bristles; some of the veins of the wings bristly .

Scutellum with four, seldom with two bristles. an

Wings very broad with rounded tip, the central portion or nearly

the whole surface with a very fine reticulation . .

Wings of normal shape, with a more scattered reticulation .

Tip of the wings with a narrow white border or with small white

spots soe ee

Tip of the wings broadly yellow with hyaline stripes or spots.

BIOL. CENTR.-AMER., Dipt., Vol. II., September 1899.

401

10.

Hexacheta, Low.

4.,

Anastrepha, Schiner.

Plagiotoma, Low.

Sptlographa, Low.

Céidaspis, Low.

Rhagoletis, Low.

Polionota, v. d. W.

Aciura, Rob.-Desv.

Polymorphomyia, Snow.

Blepharoneura, Low.

11.

12.

13.

Eutreta, Low.

Acrotenia, Low.

3 f

402 DIPTERA.

13. The fuscous coloration of the mings not radiated at the margins or

at the tip . . . se ee .

The fuscous coloration of the wings radiated at the margins or at

least at the tip . . . oe

14. Wings yellowish, with some rather large hyaline dots

Wings fuscous, with many hyaline dots of different sizes

15. Proboscis long and geniculated ;

Proboscis of usual shape, with short terminal lips 2 .

16. Radiation along the whole margin of the wings; scutellum swollen .

Radiation only at the apical part of the wings; scutellum not

swollen

17. The fuscous coloration extended over the whole surface of the wings. —

The fuscous coloration forming a large subapical spot, which emits

several rays to the tip and to the margins

HEXACHATA.

Hexacheta, Low, Monogr. Dipt. N. Am. iii. p. 219 (1873).

1. Small cross-vein beyond the middle of the discal cell .

Small cross-vein on the middle of the discal cell

14.

16.

Baryplegma, v. d. W.

15.

Ensina, Rob.-Desv.

Tephritis, Latr.

Carphotricha, Low.

17.

Euaresta, Low.

Urellia, Rob.-Desv.

2. The infuscate border of the posterior cross-vein connected with the other

brown markings; in the apical portion of the wings a narrow brown

stripe extending obliquely through the first and second posterior cells.

eximia, Wiedem.

The infuscate border of the posterior cross-vein separated from the other

brown markings, and provonged upwards to a narrow, perpendicular

cross-band .

3. The brown coloration of the wings with some large and deep incisions,

but without small hyaline dots .

The brown coloration of the wings of a more irregular pattern and inter-

rupted by some small hyaline dots .

4, The brown coloration extended over the whole surface of the wings, with

several, rather small, marginal incisions

The brown coloration forming irregular cross-bands and spots .

amabilis, Low.

socialis, Wiedem.

pulchella, v. d. W.

5. The hyaline triangular costal spot beyond the stigma* reaching the

second vein or with a small point beyond it .

rupta, v. d. W.

The hyaline triangular costal spot beyond the stigma much larger and

reaching to near the fourth vein

1. Hexacheta eximia, (Tab. XI. fig. 15, wing.)

. splendida, Gigl.-Tos.

Trypeta eximia, Wiedem. Aussereur. zweifl. Ins. i. p. 417'; Low, Monogr. Dipt. N. Amer. iii.

p. 216. 1°.

Tephritis fasciventris, Macq. Dipt. Exot., Suppl. 4, p. 291, t. 27. fig. 3°.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).—Souta America, Surinam },

Brazil 2 3,

* “‘ Stigma ” is the enlarged costal end of the mediastinal cell, usually dark-coloured.

HEXACH ATA. 403

2. Hexacheta amabilis. (Tab. XI. fig. 16, wing.)

Trypeta amabilis, Low, Monogr. Dipt. N. Amer. iii. p. 219°.

Hexacheta amabilis, Gig|.-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 59’.

Hab. Mexico}, North Yucatan (Gaumer).

Five specimens of this species (four males and one female) have been received from

Yucatan.

3. Hexacheta socialis. (Tab. XI. fig. 17, wing.)

Trypeta socialis, Wiedem. Aussereur. zweifl. Ins. ii. p. 491°.

Hexacheta socialis, Gig].-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 59”.

Tephritis major, Macq. Dipt. Exot., Suppl. 2, p. 93, t. 6. fig. 6°.

Hab. Mexico?, Atoyac in Vera Cruz (H. H. Smith).—Brazin? 3.

Two females. They agree with Wiedemann’s description, except that the colour of

the head and thorax is a clearer rufous, and the middle and hind femora are blackish

on the basal two-thirds. The front is as broad as the eyes, a little narrowed towards

the base of the antenne; there are three pairs of frontal bristles. The pleure, save

their anterior part, and the metanotum are black; a yellow stripe runs from the

shoulders to the root of the wings. The abdomen is yellow, with black front-borders

to the segments; on the sides there are black bristles; the ovipositor is as long as the

preceding three segments together, conical, shining black or brown. ‘The blackish

stigma does not show a white dot. The small cross-vein is on the middle of the

discal cell.

The Mexican specimens before me have a length of 6°5 millim.: Wiedemann!

gives 3, and Macquart® 4:5 lines. Nevertheless, Low’s synonymy (Monogr. Dipt.

N. Amer, ili. p. 219) seems to be quite correct.

4. Hexacheta pulchella, sp.n.,¢. (Tab. XI. fig. 18, wing.)

Yellowish-rufous ; abdomen with black stripes; wings brown, with hyaline spots and many incisions, two

of which are between the ends of the second and third veins; small cross-vein on the middle of the

discal cell.

Length 5°5 millim.

Head rufous ; front a little broader than the eyes, with nearly parallel sides; frontal bristles black, those on

the vertex stouter; face pale rufous; oral margin slightly prominent. Antenne rufous; third joint

elongate, rounded at the tip, reaching to beyond the middle of the face: arista black, somewhat pubescent.

Proboscis and palpi rufous. Thorax, including the pleura, scutellum, and metanotum, rufous; on the

latter two dark longitudinal stripes. Abdomen convex, rufous, with black lateral stripes and some black

dorsal spots; ovipositor very long, conical, brownish-black, its apical joint lanceolate, rufous. Legs

rufous; front femora with a row of bristles on the underside. Wings rather broad, the costa slightly

convex; in the black stigma a white line along the end of the auxiliary vein and a small white dot at the

tip; the brown coloration has several incisions—one immediately beyond the stigma, two between

the ends of the second and third veins, one at the tip of the wing, between the third and fourth veins,

and some others of irregular shape in the second and third posterior cells; in the vicinity of the base

3 f 2

404 | DIPTERA.

there are several small hyaline dots; there are two clear punctiform dots in the first posterior cell; the

small cross-vein is on the middle of the discal cell.

Hab. Muxico, Teapa in Tabasco (H. H. Smith).

A single female specimen.

5. Hexacheta rupta, sp.n.,?. (Tab. XI. fig. 19, wing.)

Rufous; thorax with blackish stripes; abdomen laterally black; the brown coloration of the wings with

irregular incisions and some hyaline dots; small cross-vein on the middle of the discal cell.

Length 5 millim.

Front dark rufous, as broad as the eyes, with two, anteriorly connected, brownish stripes ; ocellar tubercle and

the frontal bristles black; face pale rufous; oral margin slightly prominent. Antenne, proboscis, and

palpi rufous. Thoracic dorsum rufous, with three blackish stripes, which posteriorly merge into a more

general dark coloration; pleure, scutellum, and metanotum rufous; the second pair of lateral bristles on

the scutellum much shorter than the others. Abdomen shining rufous; second segment with a black

front-border ; the sides of the following segments black, with rufous spots (in one of the specimens the

black colonr is more extended); ovipositor much shorter than in the preceding species, conical, and

flattened, the first joint shining black, the second rufous. Legs rufous; front femora inferiorly with a

row of bristles ; hind tibize with bristly hairs on the outer side. Halteres rufous. Wings rather broad ;

the stigma black, with a clear line along the tip of the auxiliary vein; the costa before the stigma

alternately brown and hyaline; immediately beyond the stigma a subtriangular hyaline costal spot, not

reaching to the third vein; in the middle of the posterior margin is a large subquadrate incision, and at

the end of it a large triangular one, both interrupted by a few irregular brown spots; a much smaller

incision near the end of the third posterior cell; in the first posterior cell, just above the posterior cross-

vein, is a hyaline dot, and there are some similar dots of different sizes in the basal cells.

Hab. Mexico, Teapa in Tabasco (H. H. Smith).

Three female specimens.

_ 6. Hexacheta splendida, (Tab. XI. fig. 20, wing.)

Blepharoneura splendida, Gig].-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 58, fig. 20’.

Hab. Mexico; Costa Rica, Rio Sucio (Rogers).

A single male specimen of this insect has been received from Costa Rica. It agrees

fully with the description and figure given by Giglio-los. The veins of the wings are

distinctly spinose, as in the genus Blepharoneura, which has six bristles on the

scutellum, in common with Hearacheta, but differs from it by the reticulated wings.

As the wings of the present species are not reticulated, I prefer to include it in the

genus Hexacheta.

ANASTREPHA.

Anastrepha, Schiner, Dipt. Novara Reise, p. 263 (1868). |

1, Anastrepha fraterculus. (Tab. XI. fig. 21, wing.)

Dacus fraterculus, Wiedem. Aussereur. zweifl. Ins. ii. p. 524’.

Trypeta (Acrotoxa) fraterculus, Low, Monogr. Dipt. N. Amer. iii. p. 222, t. 10. fig. 67.

Trypeta unicolor, Léw, Monogr. Dipt. N. Amer. i. p. 70, t. 2. fig. 6°.

Hab. Mexico, North Yucatan (Gauwmer).—Co.LompBia?; Braziu!; Peru ?; Cupa.

ANASTREPHA.—PLAGIOTOMA. 405

Four specimens (two males and two females). The ovipositor of the female is

as long as the three preceding abdominal segments together, conical, not flattened,

truncated at the tip; it is rufous in colour, with the apex blackish. The pale yellow

stripes on the thorax, mentioned in Léw’s diagnosis, are hardly visible in the specimens

before me. I suspect that A. munda, Schin. (Dipt. Novara Reise, p. 264), is synonymous

with the present species.

Léw (Monogr. Dipt. N. Amer. iii. p. 227) introduced the generic name Acrotora for

this and certain other American Trypetinz with the fourth vein distinctly curved

upwards near its end; but he did not notice that Schiner a few years before had

separated Dacus fraterculus, Wiedem., under the name Anastrepha. It is true that

this latter was intended to replace the preoccupied name Leptoxys, Macq., which was

founded on an African ‘Trypetid with other characters. At all events, Anastrepha,

Schin., has priority over Acrotora, Low. It is remarkable that Low, in vol. iii. of

his ‘ Monograph,’ has totally ignored Schiner’s work, though he must have been well

aware of it.

2. Anastrepha tripunctata, sp.n.,¢ @. (Tab. XI. fig. 22, wing.)

Yellowish-rufous ; tip of the scutellum and two dots on the metanotum black; wings hyaline, with yellow,

partly infuscated streaks.

Length 5 millim.

Allied to the preceding species. The front is broader, though a little narrowed towards the base of the

antenne; the thorax is uniformly shining rufous; the scutellum has a black apical spot and the metia-

notum two black dots. The yellow pattern of the wings is very like that of A. fraterculus; the hyaline

spot beyond the end of the first vein, however, is much smaller and does not fully reach the second vein :

the apical half of the stigma is fuscous ; the infuscated border of the tip of the wings is broader and has

on each side of the end of the second vein a very small hyaline dot; the oblique stripe in the apical

portion of the wings is fully connected with the other yellow markings. The third vein is bristly as far

as the small cross-vein.

Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith).

A male and a female.

PLAGIOTOMA.

Plagiotoma, Low, Monogr. Dipt. N. Amer. iii. p. 252 (1878).

1. Plagiotoma obliqua. (Tab. XI. fig. 23, wing.)

Trypeta obliqua, Say, Journ. Acad. Phil. vi. p. 186°; Low, Monogr. Dipt. N. Am. i. p. 99”, and iii.

p- 251, t. 11. fig. 14°; Osten Sacken, Western Diptera, p. 190°.

'Plagiotoma obliqua, v.d. Wulp, Tijdschr. v. Ent. xxvi. p. 54°; Snow, Kansas University Quarterly,

ii. p. 162°; Gigl.-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 537.

Hab. Norta Americal‘ ®.—Mexico5’, Orizaba (H. H. Smith and F. D. Godman),

Atoyac in Vera Cruz (Hl. H. Sinith).

Four specimens (one male and three females).

406 DIPTERA.

SPILOGRAPHA.

Spilographa, Léw, Europ. Bohrfliegen, p. 39 (1862).

CEdicarena, Low, Monogr. Dipt. N. Amer. iii. p. 247.

Five species of this genus are represented in the Mexican collections before me.

None of them, however, can be identified with the North-American 8S. electa, Say,

S. flavonotata, Macq., and S. (Gdicarena) persuasa, Ost. Sack, nor with the Mexican

S. (Gdicarena) tetanops, Low.

1. Small cross-vein distinctly beyond the middle of the discal cell; markings

of the wings yellowish. . . . . . . . . . . . . striata, v.d. W.

Small cross-vein on the middle or nearly on the middle of the discal cell ;

markings of the wings fuscous . . . . toes - - 2.

2. Thoracic dorsum cinereous ; abdomen black or with black cross-bands . . 38.

Thorax and abdomen rufous, the abdomen sometimes with black spots. . 4.

3. Femora blackish; front scarcely a little broader than the eyes . . . obfuscata, v. d. W.

Femora rufous; front much broader than the eyes . . . . . . . « Jatifrons,v.d. W.

4, Face perpendicular; the fuscous stripes on the wings, though often inter-

rupted, recognizable . . . 2. 2. 2. ww ww ee ee ew fata, v. dW.

Face distinctly retracted ; the fuscous markings of the wings indicated by

some spots only . concolor, v. d. W.

1. Spilographa striata, sp.n.,¢. (Tab. XI. fig. 24, wing.)

Yellowish-rufous; abdomen with black lateral stripes; wings hyaline, with yellowish, partly infuscated

markings.

Length 5-25 millim.

Head rufous ; front a little broader than the eyes, with parallel sides; frontal and postvertical bristles black ;

face perpendicular, with whitish dust ; oral margin broad, not prominent; cheeks broad ; occiput swollen.

Antenne rufous, reaching to the middle of the face; second joint with a short bristle; third joint

elongate-oval; arista black, pubescent. Proboscis and palpi rufous. Thorax and scutellum rufous;

metanotum slightly infuscated and very shining; scutellum with four rather long black bristles.

Abdomen broad, flattened, shining rufous, on the sides of the second and each of the following segments

a black stripe; anal segment shorter than the preceding, black at the tip; ovipositor brownish-rufous,

very short and truncated. Legs and halteres pale rufous. Wings much longer than the abdomen; the

base, including the second and third basal cells, yellow ; on the costal region the yellow markings reach

to a little beyond the end of the first vein, with a branch covering the small cross-vein; the proximal

part of the discal cell, and a slightly arcuated cross-band, from the end of the submarginal cell to the

posterior cross-vein, are also yellow; the stigma, a small spot above the origin of the third vein, a stripe

along the ends of the fifth and sixth veins, a border on the posterior cross-vein, and a border along the

tip of the wings, are fuscous; the small cross-vein distinctly beyond the middle of the discal cell.

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith).

A single female specimen.

2. Spilographa obfuscata, sp.n.g. (Tab. XI. fig. 25, wing.)

Thoracic dorsum cinereous ; head, pleure, and legs rufous, the femora blackish; metanotum and abdomen

black, the hind borders of the segments grey ; wings with brown cross-bands.

Length 5:25 millim.

SPILOGRAPHA. AQT

Front rufous, as broad as the eyes, posteriorly slightly enlarged, on the vertex very shining ; frontal and post-

vertical bristles black ; face and cheeks pale yellow; the face perpendicular ; cheeks broad, their inferior

part as high as half the longitudinal diameter of the eyes; oral margin broad, not prominent; occiput

swollen, in the middle dark rufous, at the sides paler. Antenne rufous; third joint elliptical, not

reaching half the length of the face; arista brownish, pubescent. Proboscis brown; palpi rufous.

Thoracic dorsum obscure cinereous, with three narrow brown lines; shoulders and pleure rufous; a

yellowish-white stripe from the shoulders to the root of the wings; scutellum brown, with four long

bristles; metanotum black. Abdomen slightly convex, black, with grey hind-borders to the segments ;

tip of the anal segment rufous. Legs rufous; the femora, except at the tip, blackish. Halteres rufous.

Wings longer than the abdomen, hyaline, with four somewhat irregular brown cross-bands: the first, near

the base, immediately beyond the humeral cross-vein, covering the base of the basal cells and bordering

the sixth vein; the second band has its origin in the more obscure stigma and runs in an oblique direction

over the small cross-vein and through the discal cell to the posterior margin ; the third band begins on

the costa at the tip of the second vein, borders the posterior cross-vein, and would form with the second

band a V-like figure, if it was not interrupted in the first posterior cell; the fourth cross-band forms a

rather short border at the tip of the wings; between the second and third cross-bands there is also

a brown stripe, reaching from the costa to a little beyond the second vein; the small cross-vein is on the

middle of the discal cell.

Hab. Mexico, Omilteme in Guerrero 8000 feet (Hl. H. Smith).

A single male specimen.

3. Spilographa latifrons, sp.n..¢. (Lab. XI. fig. 26, wing.)

Thoracic dorsum cinereous; head, pleure, and legs rufous ; abdomen blackish, with rufous tip; front broad;

wings with brown cross-bands.

Length 5°25 millim.

Allied to the preceding species (S. obfuscata), and agreeing with it in most respects. The front is much broader

than the eyes, with parallel sides, on the vertex with three shining spots. Face slightly retracted ;

inferior part of the cheeks as long as one-third of the longitudinal diameter of the eyes. Antenne a

little longer than in S. obfuscata. Scutellum and metanotum rufous. The rufous coloration at the tip of

the abdomen has a larger extension. The femora are not blackish, but rufous, like the rest of the legs.

The venation and pattern of the wings are quite similar to those of S. obfuscata, but the third cross-band

is complete and not interrupted in the first posterior cell.

Hab. Mexico, Ciudad in Durango 8100 feet (Forrer).

A single male specimen.

4. Spilographa rufata, sp.n..¢ @. (Lab. XI. fig. 27, wing.)

Rufous; anal segment of the male with two black spots ; wings hyaline, with interrupted brownish cross-bands :

face perpendicular.

Length 4-5 millim.

Of a general rufous coloration, including the antenuz, proboscis, palpi, and legs. Front as broad as the eyes,

slightly enlarged towards the vertex ; ocellar tubercle blackish, on each side of it a shining spot; frontal

bristles black. Face and cheeks yellowish; face perpendicular; cheeks broad. Second joint of the

antennew with a short bristle; third joint elliptic, reaching half the length of the face; arista black,

subpubescent. Anal segment in the male with two lateral black spots (in one of the specimens the

abdomen shows traces of a more extended blackish coloration); ovipositor of the female short, its first

joint black, the second rufous, lanceolate. Wings much longer than the abdomen, hyaline, with a fuscous

pattern, very similar to that of Spilogrupha (dacarena) tetanops, Low (Monogr. Dipt. N. Amer, iii. t. 11.

fig. 15), but the cross-bands are incomplete, being more or less interrupted, and the apical spot is concave

408

DIPTERA.

at the inner side; the first vein beset with short bristles, and the third also from the base to the small

cross-vein, which is placed on the middle of the discal cell.

Hab. Mexico, Sierra de las Aguas Escondidas 7000 feet, and Omilteme 8000 feet,

both in Guerrero (4. H. Smith).

Several specimens of both sexes.

5. Spilographa concolor, sp.n.,3 2. (Tab. XI. fig. 28, wing.)

Rufous ; wings with fuscous spots; face retracted.

Length 4 millim.

Yellowish-rufous ; face and legs clearer. Front broader than the eyes, with parallel sides, slightly prominent ;

face retracted ; inferior part of the cheeks half as high as the longitudinal diameter of the eyes. Antenne

not fully reaching to the middle of the face. Scutellum with four rather long bristles. Anal appendices

of the male brown; ovipositor of the female not infuscated. Wings hyaline, with fuscous spots; the

stigma yellowish, brown at the tip; between the end of the first and second veins a costal spot; a rather

large apical spot, which is convex on the inner side and sometimes indicated along the veins only; all the

cross-veins and the origin of the third vein with a narrow border; an almost obsolete spot in the middle

of the first posterior cell; a small adherent spot under the stigma is visible in the male, this being absent

in the females; small cross-vein nearly on the middle of the discal cell; apparently no bristles on

the veins.

Hab. Mexico, Mexico city (H. H. Smith).

One male and two female specimens.

GEDASPIS.

(Edaspis, Low, Europ. Bohrfliegen, p. 46 (1862).

1. Gidaspis atra. (Tab. XI. fig. 29, wing.)

(Edaspis atra, Liw, Berl. ent. Zeitschr. vi. p. 219*; Dipt. Amer. sept., cent. ii. no. 89°; Monogr.

Dipt. N. Amer. iii. p. 256, t. 11. fig. 17°.

Hab. Norta America!~?,—Mexico, Northern Sonora (Morrison).

Four specimens (1 ¢, 3 2).

RHAGOLETIS.

Rhagoletis, Low, Europ. Bohrfliegen, p. 44 (1862).

1. Rhagoletis striatella, sp.n.,¢. (Tab. XI. fig. 30, wing.)

Black ; head, tibiee, and tarsi rufous; thoracic stripes, scutellum, and incisions of the abdomen whitish ; wings

with three blackish cross-bands, the third prolonged to the tip and emitting an oblique branch to the

posterior margin.

Length 5-25 millim.

Front rufous, as broad as the eyes, with nearly parallel sides; frontal bristles black, rather stout; face and

cheeks pale rufous; face perpendicular ; oral margin broad, not prominent. Antenne rufous; third joint

elliptic, slightly narrowed towards the tip, reaching to half the length of the face; arista brown, micro-

seopically pubescent. Proboscis and palpi rufous. Thorax black, with two broad, whitish, dorsal stripes,

and on each side a well-defined white stripe, the latter extending from the shoulders to the root of the

wings ; scutellum white, with the base and a spot on each side black, and with four bristles. Abdomen

RHAGOLETIS.—POLIONOTA. 409

convex, shining black, all the segments with a narrow white hind-border ; ovipositor long, its first joint

conical, shining black, the second cylindrical, brown, the third lanceolate, very pointed, rufous. Legs

rather stout ; the coxse, femora, and hind tibie black; tips of the femora and the front and middle tibic

rufous; tarsi pale rufous. Halteres yellowish. Wings whitish-hyaline, with brown cross-bands. The first

cross-band is narrow and runs from the humeral cross-vein, through the first and second basal cells to the

pointed tip of the third basal cell. he second cross-band is broader and runs from the stigma, through

the discal cell, to the hind margin of the wings; it covers the small cross-vein, and beneath the fifth vein

is somewhat faded and attenuated, and more or less connected with the following cross-band, which borders

the posterior cross-vein and at the costa is prolonged to a broad apical border, ending at the tip of the

fourth vein; in the middle the third cross-band emits a branch in an oblique direction to the end of the

posterior margin. The third and fourth veins are nearly straight and parallel. The small cross-vein

is on the midddle of the discal cell.

Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen. In the coloration of the wings and the markings of

the body this species agrees with Trypeta cingulata, Low, T. tabellaria, Fitch, and

T. pomonella, Walsh, which Low (Monogr. Dipt. N. Amer. ili. pp. 263-267) has

referred to Rhagoletis. I therefore include the allied Mexican form in that genus.

R. striatella seems to come near the Brazilian Ortalis ochraspis, Wiedem. (Aussereur.

zweifl. Ins. ii. p. 466), which is probably a Rhagoletis. ‘The two insects indeed may

prove to be identical, as Wiedemann’s description is quite applicable, with the exception

of a slight difference in the pattern of the wings, 7. e. the presence in O. ochraspis of a

small stripe on the costa between the second and third cross-bands.

POLIONOTA, gen. nov.*

This generic name is proposed for Acrotora mucida, Gigl.-Tos [Mem. R. Accad. Sci.

di Torino, ser. 2, xlv. (sep.) p. 58, fig. 21], from Mexico, which does not belong to

Acrotoxa, Low (Anastrepha, Schin.) (according to the figure of the wing given by the

author), as it wants the principal character of that genus, viz. the curvature of the end

of the fourth vein. In its general aspect and the pattern of the wings A. mucida shows

a relationship with Hexacheta, but having only four bristles on the scutellum it cannot

be placed there. It seems therefore to require a new genus for its reception, more

especially as I am acquainted with a second closely allied form.

Front broader than the eyes; the face perpendicular; the thorax cinereous; the abdomen uniformly shining

black. Fourth vein not curved at the end. From /exachwta it differs in the pattern of the wings: in

Hexacheta the subtrigonal costal incision next the stigma reaches with its inferior tip beyond the small

cross-vein, whilst in Polconota it includes that cross-vein.

* gwodwds, grey; viros, thorax.

[Since these pages have been in type, the writer, Herr F. M. van der Wulp, has passed away. The last

pages of the proof-sheets of the Trypetinw (pp. 401 et seq.) were corrected by him shortly before his death,

on Nov. 27th. ‘To avoid delay, the figures crowded out of Tab. XII. will be inserted in the text.—Ep.]

BIOL. CENTR.-AMER., Dipt., Vol. I1., December 1899. 3g

410 DIPTERA.

1. Polionota mucida. (Tab. XII. fig. 1, wing.)

Acrotoxa mucida, Gig].-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 58, fig. 21’.

Head, antenn, proboscis, palpi, legs, and halteres yellowish-rufous; thorax rufo-cinereous, with a short yellow

pilosity ; scutellum black, with the hind-border broadly yellowish-white ; abdomen shining black. Wings

fuscous, with the following hyaline portions: a complete transverse cross-band near the base; immediately

beyond the stigma a trigonal costal spot, the tip of which includes the small cross-vein; three deep

incisions at the end of the posterior margin, the exterior one extending to the first posterior cell; a

smaller incision on the hind margin, under the discal cell; and a large oval dot in the proximal half of

the discal cell and a dot upon the end of the sixth vein.

Hab. Mexico}, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single male specimen of this species has been received from Guerrero.

2. Polionota radians, sp.n. (Tab. XII. figg. 2, wing; 2a, abdomen, ? .)

Very like the preceding species, but differing as follows: the thorax more obscure cinereous ; the wings without

a hyaline cross-band near the base; the blackish stigma with a small clear dot; the antenne a little

shorter; the oral margin less prominent; the inferior portion of the cheeks larger. The abdomen of the

female is slender; the ovipositor very long, its basal segment flattened, shining black, the second

lanceolate, rufous, appearing three-jointed.

Hab. Mexico, Sierra de las Aguas Escondidas 9500 feet (H. H. Smith).

One male and two females.

? ACIURA.

Aciura, Robineau-Desvoidy, Essai sur les Myodaires, p. 773 (18380).

1. Aciura insecta., (Tab. XII. fig. 3, wing.)

Trypeta insecta, Léw, Monogr. Dipt. N. Amer. i. p. 72, t. 2. fig. 8°; iii. p. 268, t. 10. fig. 8%.

Aciura insecta, Schiner, Dipt. Novara Reise, p. 265’.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman), Tierra Colorada in Guerrero,

Atoyac and Medellin in Vera Cruz, Teapa and Frontera in Tabasco (H. H. Smith).—

CoLomBIA?; Braziu; ANTILLES, Cuba! 2, Haiti.

Several specimens of both sexes. The extension of the black coloration on the

abdomen, as well as the pattern of the wings, is somewhat variable. Some examples

seem to agree with the Brazilian A. phenicrura, Léw (1. ¢. ill. p. 269), but there are

many transitions, and the essential differences between the two species are not quite

clear in his descriptions.

POLYMORPHOMYITIA.

Polymorphomyia, Snow, Kansas University Quarterly, ii. p. 165 (1894).

A single species from Mexico is referred to this genus. In the shape and pattern of

the wings it approaches the N.-American P. basilica, Snow, the only Polymorphomyia

hitherto described.

POLYMORPHOMYIA.—BLEPHARONEURA. Al}

1. Polymorphomyia pilosula, sp.n.,¢ 9. (Tab. XII. fig. 4, wing.)

Brownish-cinereous, with short yellowish hairs; head and legs rufous, the femora black; wings fuscous, with

hyaline incisions, a white apical border and three white central dots.

Length 3°5 millim.

Head rufous; front a little broader than the eyes, parallel-sided, and with a short yellowish pilosity ; frontal

bristles black, weak ; face perpendicular; oral margin not prominent; cheeks broad, their inferior portion

one-third of the longitudinal diameter of the eyes; on the vertex behind the orbits a row of yellow bristles.

Antenne rufous; third joint elongate, slightly tapering towards the tip, reaching beneath to the middle

of the face; arista black, microscopically pubescent. Proboscis and palpi rufous. Thorax, scutellum,

and abdomen dark cinereous, densely beset with short bristly yellowish hairs; scutellum convex, with

four black bristles; abdomen rather flattened ; ovipositor of the female shining black, truncated. Legs,

including the coxe, rufous; fore femora infuscated on their basal half; middle and hind femora black,

with the exception of the base and tip. Halteres whitish. Wings broad, along the costa and the posterior

margin slightly convex; second vein distinctly undulate; cross-veins approximated ; the posterior cross-

vein very oblique. The wings have a general fuscous coloration, with the following portions white or

_ hyaline: a small white dot on the proximal side of the humeral cross-vein; two hyaline incisions on the

costa, before the stigma, and a third beyond it; at the hind margin also three incisions, one in the second

and two in the third posterior cell ; a white apical border, beginning at the costa between the first and

second veins, and ending before it has reached the fourth vein; in the disc are three hyaline dots in a

triangle, one in the first basal cell, another in the first posterior cell, and the third in the discal cell ;

there are also two small white dots in the basal portion of the inferior margin, in the vicinity of the

third basal cell.

Hab. Mexico, Atoyac in Vera Cruz and Teapa in ‘Tabasco (H. H. Smith).

One male and one female. This species differs from P. basilica in having the body

dark cinereous (instead of shining black); the front and cheeks broader, the scutellum

convex, and the tibie and tarsi rufous. ‘The white apical border of the wings is shorter

and does not reach the end of the fourth vein, nor has it a narrow black margin; the

cross-veins are more distant.

BLEPHARONEURA.

Blepharoneura, Liw, Monogr. Dipt. N. Amer. iii. p. 272 (1873).

1. Thorax uniformly rufous. . . . . . . . . . . 2 . fulvicollis, v. d. W.

Thorax rufous, with black stripes. . . . 2... 1 1 ee ee

2, Hind femora witha black tip. . . . . . . . . . . . ) .) femoralis, v. d. W.

’ Hind femora wholly rufous. . . - oe ee BE

8. Tip of the wings, between the end of the second ‘and that of the fifth

vein, with six hyaline spots of irregular form . . . . . . . qQquadristriata, v. d. W.

Tip of the wings, between the end of the second and that of the fifth

vein, with eleven rounded dots, eight of which form a double row . diseriata, v. d. W.

1. Blepharoneura fulvicollis, sp.n.¢ 9. (Tab. XII. fig. 5, wing.)

Rufous; abdomen variegated with black ; wings fuscous, with many hyaline spots of different sizes.

Length 45-6 millim.

Head yellowish-rufous ; front a little broader than the eyes, with parallel sides; frontal bristles black; fave

slightly retracted: oral margin abruptly prominent. Antenne rufous; third joint elliptic, reaching to

og 2

412 DIPTERA.

beyond the middle of the face; arista black, pubescent. Proboscis and palpi rufous. Thorax, scutellum,

and metanotum rufous; thoracic dorsum with yellow pilosity, at the posterior margin with two brown

spots; metanotum also with two brown spots, which are sometimes prolonged to stripes; the bristles on

the sides of the thorax black, some yellow ones above the coxe only ; scutellum with six black bristles.

Abdomen rufous; on the second and each of the following segments a row of four black dots and laterally

a black stripe or hind-border ; these markings often indistinctly separated from the more fuscous ground-

colour (perhaps in consequence of exsiccation). Ovipositor of the female flattened, its first joint shining

black, the second rufous, lanceolate. Legs pale rufous. Halteres yellow. Wings longer than the

abdomen, rather broad; the costal cell with alternate brown and clear spots; stigma blackish-brown,

with a clear line along the end of the auxiliary vein and a white dot at the tip; immediately beyond the

stigma a subtrigonal hyaline costal spot, reaching the third vein ; round the tip of the wings a row of hy aline

dots, and at the posterior margin a very large hyaline spot, formed by an aggregation of several dots ,

there are also some isolated white dots in the centre. The first, third, and fifth veins are beset with short

bristles; the small cross-vein is on the middle of the discal cell.

Hab. Mexico, Tepetlapa 3000 feet, Chilpancingo 4600 feet, Xucumanatlan 7000 feet,

all in Guerrero, Vera Cruz, and Teapa in Tabasco (H. H. Smith).

Several examples of both sexes. The above-described pattern of the wings (fig. 5)

is that of the majority of the specimens. The stigma rarely shows a trace of a second

clear dot; and the large hyaline spot on the posterior margin is often reduced to some

isolated and irregular spots. One of the most aberrant forms is represented on Tab. XIT.

fig. 5a. This latter figure very much resembles that of B. saga, Gigl.-Tos [Mem. R.

Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 56, fig. 19}; but the description of the author

1s not quite applicable to the insect before me.

2. Blepharoneura femoralis, sp.n.,¢ 9. (Tab. XII. fig. 6, wing.)

Rufous; the stripes on the thorax, the spots on the pleuree and abdomen, and the tips of the hind femora,

black ; wings with large, partly coalescent, hyaline spots.

Length 5°25 millim. .

Very like the preceding species (B. fulvicollis), but differing from it in the black markings of the thorax, the

black tip to the hind femora, and the coloration of the wings. Thoracic dorsum with four black stripes,

which are interrupted at the transverse suture ; some black spots on the pleure ; the breast wholly black ;

two spots on the scutellum and two stripes on the metanotum. On the sides of the thorax several rather

stout, black bristles; scutellum with six bristles. The second and each of the following abdominal

segments with a pair of black dorsal spots and a black lateral stripe ; sometimes the black coloration of

the abdomen is more extended and leaves only some regular rufous markings. Ovipositor of the female

as in B. fulvicollis. Legs rufous; the tips of the hind femora black. Halteres yellow. On the wings

most of the hyaline marks are large and coalescent; stigma with a white spot and a clear line at the end

of the auxiliary vein; immediately beyond the stigma a large hyaline costal spot, reaching to the first

posterior cell, sometimes showing a tendency to be divided in two; opposite to this spot there is on the

posterior margin a much larger, subquadrate, hyaline spot, which fills the greater part of the discal cell ;

in the apical portion of the wings are several nearly coalescent hyaline spots; there are also in the basal

part and in the centre of the wing some isolated smaller spots. The first, third, and fourth veins bristly ;

the small cross-vein on the middle of the discal cell.

Hab. Mexico, Sierra de las Aguas Escondidas and Omilteme, both in Guerrero

7000 to 8000 feet (H. H. Smith). |

Several specimens of each sex.

BLEPHARONEURA.—EUTRETA. A415

3. Blepharoneura quadristriata, sp.n.¢. (Tab. XII. fig. 7, wing.)

Rufous; thoracic dorsum with four black stripes; abdomen with black, medially interrupted, cross-bands ;

wings fuscous, with hyaline spots.

Length 4 millim.

Like the preceding (B. femoralis), but smaller, and without black spots on the pleure; the hind femora not

black at the tip; the black lateral stripes of the abdomen broader and leaving only a rufous dorsal band,

without spots. The fuscous coloration of the wings is more extended, the hyaline spots beyond the stigma

and the spot on the hind margin being smaller, this latter is subtrigonal, with a fuscous stripe in the

middle; the hyaline spots in the apical part of the wings are less numerous and more separated une

from another.

Hab. Mexico, Teapa in Tabasco (H. H Smith).

A single male specimen, with the antenne broken off.

4, Blepharoneura biseriata, sp.n.,2. (Tab. XII. fig. 8, wing.)

Rufous; the stripes on the thorax, the base of the scutellum, and the cross-bands on the abdomen, brown;

wings fuscous, with hyaline spots, which at the apex are arranged in two rows.

Length 4 millim.

This species also is closely allied to B. femoralis, and agrees with B. quadristriata in the smaller size and the

absence of black at the tips of the hind femora. The dark markings of the thorax and abdomen are

brown (perhaps due to the immaturity of the specimen); the pleure have some brownish spots. The

ovipositor is shining brown, flattened, broad, truncated at its end. The pattern of the wings, though in

general agreeing with that of the preceding species, differs in the apical region, where there are an inner

row of five and an outer row of three hyaline spots.

Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 7000 feet (H. H. Smith).

A single female specimen.

EUTRETA.

Eutreta, Low, Monogr. Dipt. N. Amer. iii. p. 276 (18738).

1. Eutreta sparsa. (Tab. XII. fig. 9, wing.)

Trypeta sparsa, Wiedem. Aussereur. zweifl. Ins. 11. p. 492'; Low, Monogr. Dipt. N. Amer. i. p. 78,

t. 2. fig. 13°; idem, iii. p. 274, t. 10. fig. 13°,

Eutreta sparsa, Ost. Sack. Western Diptera, p. 345°; v. d. Wulp, Tijdschr. voor Ent. xxvi. p. 54° ;

Snow, Kansas University Quarterly, ui. p. 167, t. 6. figg. 10, 11°; Gigl.-Tos, Mem. R. Accad.

Sci. di Torino, ser. 2, xlv. (sep.) p. 55’.

Trypeta calyptera, Say, Journ. Acad. Phil. vi. p. 287°.

Platystoma latipennis, Macq. Dipt. exot. ii. 3, p. 200, t. 26. fig. 8°.

Acinia noveboracensis, Fitch, First Report on the noxious, beneficial, and. other Insects of N. York,

p. 67.

Hab. Nort America® §10.—Mexico’, Northern Sonora (Morrison), Presidio de

Mazatlan (Forrer), Mexico city, Amula and Xucumanatlan in Guerrero, Cuernavaca in

Morelos (H. H. Smith), Orizaba (H. H. Smith & F. D. Godman).

A common insect in Mexico.

414 DIPTERA.

2. Kutreta patagiata, sp.n.¢ 9. (Tab. XII. fig. 10, wing.)

Brown; head, pleure, and legs rufous; wings broad, fuscous, with numerous clear dots, small whitish spots

on the margins, and a white apical border.

Length 5°5 millim.

Closely allied to the preceding (Z. sparsa), but differing from it in having a row of hyaline spots along the costal

two of which are between the ends of the first and second veins; the wings broad, less rounded at the

tip, the clear dots somewhat larger and less regular, the white apical border broader, ‘its inner edge

straighter and perpendicular.

Hab. Mexico, Omilteme and Sierra de las Aguas Escondidas, both in Guerrero,

8000 to 9500 feet (H. H. Smith).

Four specimens, two of each sex. This species seems also to be allied to Lcaria

distincta, Schin. (Diptera Novara Reise, p. 276), from South America; but Schiner’s

description of the wings is not quite applicable, as he mentions four hyaline costal spots

between the first and second veins.

The generic name Jcaria, Schin., was published in 1868, and thus would have

priority over Eutreta, Low; Icaria, however, was preoccupied (Saussure, 1853).

ACROTAENIA.

Acrotenia, Low, Monogr. Diptera N. Amer. ili. p. 274 (1873).

The type of this genus is Trypeta latipennis, Wiedem. ‘The three Mexican species

referred to it cannot be identified from any of the published descriptions.

1. Central portion of the wings fuscous, with numerous very small hyaline dots ;

on the costa a double row of black spots; first joint of the front tarsi

enlarged inthe male . . . . . cee ee . . . tarsata,v.d. W.

Central portion of the wings fuscous, with less numerous but somewhat larger

clear dots ; no black costal spots; front tarsi not dilated . . . . » 2.

2. Stigma with two clear dots; the whole surface of the wings, except the base

and the tip, fuscous, with clear dots . . . . . . . . . « « . « apiata,v. d. W.

Stigma without clear dots ; the fuscous coloration of the central portion of

the wings interrupted by some incisions at the costa, and by a large oblique

1. Acrotenia tarsata, sp.n.,¢. (Tab. XII. figg. 11, wing; 11 a, fore tarsus.)

Head, thorax, scutellum, and legs yellowish-rufous ; abdomen brown; wings broad; a double row of black

costal spots; the central region fuscous, with numerous small hyaline dots; the apical portion yellow,

with hyaline incisions ; first joint of the front tarsi (in the male) enlarged and black at the tip.

Length 4 millim.

Front as broad as the eyes, slightly narrower anteriorly ; frontal and postvertical bristles yellow; face shorter

than the front; oral margin slightly prominent; cheeks narrow. Antenne ochraceous; third joint

elongate-oval, reaching beyond the middle of the face. Thoracic dorsum yellow-pollinose and with

yellow hairs; pleure, scutellum, and metanotum ochraceous; the scutellum with four Jong bristles,

ACROTANIA. 415

Abdomen brown, with narrow yellowish hind-borders to the segments. Legs ochraceous; front femora

with a row of yellow bristles on the upper and under sides ; first joint of the front tarsi longer than the

following joints together, enlarged and black in its apical half; the last joint also black. Halteres

yellow. Wings broad ; the surface up to the posterior cross-vein, with the exception of the base, costa,

and hind margin, brown, with numerous very small hyaline dots in regular rows; at the middle of the

costa is a double row of black spots, and beyond the last spot of the upper row is a hyaline incision not

passing the second vein; the apical third of the wings is yellow, with five incisions—two between

the second and third veins, one at the tip of the first posterior cell, and two larger ones in the second

posterior cell; there is a hyaline oblong spot between the second and fourth veins ; the yellow colour is

slightly infuscated where it touches the margin; the posterior margin of the wings is also infuscated,

with three hyaline semicircular incisions; the small cross-vein is distinctly beyond the middle of the

discal cell and bordered with blackish-brown.

Hab. Mexico, Amula in Guerrero (H. H. Smith).

A single male specimen.

2. Acrotenia apiata, sp.n.,¢ 2. (Tab. XII. fig. 12, wing.)

Rufous; wings fuscous, with numerous clear dots, the basal and apical portions yellowish, the tip and the

hind margin with hyaline incisions; tarsi not enlarged.

Length 3:5 millim.

In general shape and coloration agreeing with the preceding (A. tarsata), but differing in the coloration of the

wings. The front is a little more attenuated anteriorly ; the antenne are longer and reach to near the

oral margin; the abdomen is rufous, with brownish front-borders to the segments; the ovipositor of

the female is shining brown, flattened; the fore tarsi are not enlarged. The wings are without black

costal spots ; the stigma only is blackish-brown, with two clear dots; the base, including the second and

third basal cells, is yellowish ; the rest of the surface, the tip excepted, fuscous, with clear dots, mostly

in longitudinal rows ; the dots are larger but less numerous than in A. tarsata, especially towards the

hind margin, where the coloration is less intense; the tips of the wings are yellow, with four semicircular

hyaline incisions; there is a row of similar incisions along the hind margin.

Hab. Mexico, Chilpancingo 4600 feet, and Amula 6000 feet, both in Guerrero

(H. H. Smith).

One male and one female.

3. Acrotenia incisa, sp.n., ¢ 9. (Lab. XII. fig. 13, wing.)

Rufous ; wings fuscous, with clear dots, the tips yellow, with hyaline incisions ; the base, a large incision at

the hind margin and some smaller incisions at the costa, hyaline ; stigma without clear dots.

Length 5 millim.

Closely allied to the preceding (1. apiata), but differing again in the coloration of the wings: near the hind

margin is a large hyaline trapezoidal spot, encroaching on the median portion of the discal cell; the clear

dots are in the stigma; there is a hyaline costal spot before the stigma, and a similar spot immediately

beyond it; the clear dots on the fuscous surface are less regularly arranged than in the two preceding

species. The front is broader than the eyes, not longer than the face ; anteriorly it has on each side, close

to the base of the antenne, a black point, which is absent in A. apeata; the antenne are shorter than in

that species ; the abdomen is brownish-yellow, with the front-borders of the segments a little more obscure.

Hab. Mexico, Omilteme in Guerrero 8000) feet (H. H. Smith).

Several specimens, including both sexes.

416

DIPTERA.

BARYPLEGMA, gen. nov.*

Front posteriorly broader than the eyes, narrowed towards the base of the antenne; face short, excavated

oral margin slightly prominent; cheeks rather narrow. Antenne inserted on the median line of the

eyes; second joint somewhat prominent; third joint elliptic, reaching to beyond the middle of the face;

arista bare. Scutellum with four bristles. Ovipositor of the female conical, flattened, as long as the

three preceding segments of the abdomen united. Front femora with a row of bristles on the underside ;

hind tibie fringed with hairs on the outer side. Wings longer than the abdomen, with a yellow pattern,

interrupted by several marginal incisions and some rather large hyaline dots on the disc; third and

fourth veins straight and parallel; small cross-vein distinctly beyond the middle of the discal cell.

The single species from which these characters are taken differs from all the

described Trypetids in the coloration of the wings; it seems, therefore, to require a

separate genus for its reception.

1. Baryplegma gilva, sp.n.,¢. (Tab. XII. fig. 14, wing.)

Head rufous; frontal bristles yellow. Thorax, scutellum, metanotum, and abdomen cinereous, ochraceo-

pollinose ; the bristles of the thorax and scutellum yellow; hind-borders of the abdominal segments

fringed with yellow hairs; ovipositor shining, brownish-red. Legs pale rufous; the bristles on the

underside of the front femora and the hairs on the hind tibie black. Halteres rufous. Wings

ochraceous, with the base hyaline ; stigma with a fuscous streak near the auxiliary vein; on the costa

two hyaline spots before the stigma and two beyond it; round the tip and along the posterior margin

several incisions of different sizes; three hyaline dots in the cubital cell, one in the first basal cell, and

three in the first posterior cell; two hyaline spots in the discal cell; some of the incisions and dots more

or less margined with fuscous; posterior cross-vein slightly undulate and narrowly bordered with brown.

Hab. Mexico, Santiago Iscuintla in Jalisco (Schumann).

A single female specimen.

ENSINA.

Ensina, Robineau-Desvoidy, Essai sur les Myodaires, p. 751 (1830).

1. Small cross-vein not enclosed in the fuscous pattern of the wings . . . 2.

Small cross-vein enclosed in the fuscous pattern of the wings. . . . . 8.

2. Stigma black, without a hyaline dot . . . . . . .. . . . . . humilis, Liw.

Stigma black, with ahyaline dot . . . . 2... 7...) peregrina, Low.

3. The fuscous border of the small cross-vein separated from that of the

posterior cross-vein . . woe toe. oe . . luculenta, v. d. W.

The fuscous border of the small cross-vein connected with that of the

posterior cross-vein. . . . woe ew ew ew A

4, No hyaline spot in the first posterior cell above the posterior cross-vein . conspersa, v.d. W.

A hyaline spot in the first posterior cell above the posterior cross-vein. . 5.

5. Femora blackish . . 2. 2. 2 1. 2. 1 ew 1 1 ew... despecta, v. a. W.

Femorarufous . . . . eee ee soe ee ew we 6,

6. On the costa, between the stigma and the end of the second vein, two

hyaline incisions . . . . . mediana, v. d. W.

On the costa, between the stigma and the end of the second vein, three

hyaline incisions. . . . 1 we ee ee ww we. guttularis, v. dW.

* Gaps, coarse ;rhéypa, network.

ENSINA. ALT

1. Ensina humilis. (Tab. XII. fig. 15, wing.)

Trypeta humilis, Low, Monogr. Dipt. N. Amer. i. p. 81, t. 2. fig. 171; ill. p. 291, t. 10. fig. 17°.

Acinia picciola, Bigot, in Ramon de la Sagra’s Hist. fis. polit. y nat. de Cuba, Ins. p. 347, t. 20.

figg. 10, 10a’.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman), Chilpancingo in Guerrero,

Teapa in Tabasco (7. H. Smith).—Cvusa 1-3,

Three specimens (two males and one female).

2. Ensina peregrina. (Tab. XII. fig. 16, wing.)

Trypeta peregrina, Low, Monogr. Dipt. N. Amer. iii. p. 292, t. 10. fig. 30°.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman), Amula in Guerrero 6000 feet

(H. H. Smith).—Brazit '.

Six specimens, including both sexes.

3. Ensina luculenta, sp.n., ¢. (Tab. XII. fig. 17, wing.)

Cinereous; thorax with black stripes; abdomen with black spots; head and legs rufous, the femora blackish ;

wings reticulated with brown, the fuscous border of the small cross-rein separated from that of the

posterior cross-vein.

Length 3 millim.

Front rufous, anteriorly as broad as the eyes, slightly enlarged behind; the orbits white; frontal bristles

black ; on the vertex behind the eyes a row of yellow bristles; face whitish-yellow, perpendicular ; oral

margin not prominent; cheeks narrow. Antenne yellowish-rufous, reaching to beneath the middle of

the face. Proboscis rufous, projecting and geniculated. Thorax and abdomen cinereous ; thoracic dorsum

with three blackish stripes; abdomen with two rows of black dots. Legs rufous, the femora blackish to

near the tip. Halteres rufous. Wings elongate, hyaline, with brownish reticulation ; stigma brown,

with a white dot; three less distinct dark spots are also visible: the first adherent to the stigma, between

the first and third veins and at its end bordering the small cross-vein; the second at the end of

the second vein ; the third being a border of the posterior cross-vein. The basal portion and nearly the

whole posterior region of the wings, including the discal cell, are hyaline ; inthe discal cell there are a tew

greyish-brown cross-lines. As in all the other species of the genus, the cross-veins are approximated.

| Hab. Mexico, Omilteme in Guerrero 8000 feet (f/f. H. Smith).

A single male specimen.

4, Ensina conspersa, sp.n., ¢. (Tab. XII. fig. 18, wing.)

Cinereous ; head and legs rufous; abdomen with black spots; wings reticulated with brown, the brown

colour largely extended; the fuscous border of the small cross-vein connected with that of the posterior

cross-vein ; no hyaline spot in the first posterior cell above the posterior cross-vein.

Length 2°5 millim. | .

Closely allied to the preceding (Z. luculenta). The front is a little broader and also the cheeks; the stripes

on the thorax are absent and the femora are not blackish. The most striking difference is in the pattern

of the wings: the brown colour is more extended and covers a large portion of the central region; the

infuscation of the small cross-vein is connected with that of the posterior cross-vein ; beyond the stigma,

which has a clear dot, there are three hyaline rounded costal spots, and beneath these, between the second

and third veins, a similar spot; in the basal part of the cubital and the first posterior cells the hyaline

BIOL. CENTR.-AMER., Dipt., Vol. I1., February 1900. 3h

418 DIPTERA.

dots are wanting; in the apical region of the wings there are among the larger. hyaline dots several others

of minute size; the base and the greater part of the discal cell and of the posterior margin are hyaline,

save some pale brown cross-lines.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single male specimen.

5. Ensina despecta, sp.n.,?. (Tab. XII. fig. 19, wing.)

Cinereous ; abdomen with blackish dots; head and legs rufous, the femora blackish ; wings reticulated with

brown ; the brown border of the small cross-vein connected with that of the posterior cross-vein; a

hyaline dot in the first posterior cell above the posterior eross-vein,

Length 2°5 millim.

This species is very like £. conspersa, but it has the femora blackish to near the tip, and the pattern of the

wings somewhat different: the stigma has a white dot, and in the first posterior cell, just above the

posterior cross-vein, there is a rounded hyaline spot (wanting in EH. conspersa), which forms the inferior

tip of the usual hyaline costal triangle. The ovipositor is shining black, broad and flattened at its base,

lanceolate and rufous towards the tip.

Hab. Muxico, Xucumanatlan in Guerrero 7000 feet (Hl. H. Smith).

A single female specimen.

6. Ensina mediana, sp.n., ¢. (Tab. XII. fig. 20, wing.)

Cinereous ; abdomen with black dots; head and legs rufous; wings reticulated with brown; on the costa,

between the stigma and the end of the second vein, two hyaline incisions; in the first posterior cell,

above the posterior cross-vein, a hyaline dot.

Length 3 millim.

Closely allied to the preceding (Z. despecta), but with the femora paler and the black dots on the abdomen

more distinct. The stigma has a white dot, aud beyond it and before the end of the second vein there

are two (not three) hyaline spots: the first is large and of irregular shape, the second smaller and rounded ;

as in #. despecta, there is a hyaline dot in the first posterior cell just above the posterior cross-vein, but

this dot is not connected with those above it, and therefore the hyaline costal triangle is less complete.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single male specimen.

7. Ensina guttularis, sp.n.9. (Tab. XII. fig. 21, wing.)

Cinereous; head and legs rufous; abdomen with black dots; wings reticulated with brown ; the brown

border of the small cross-vein connected with that of the posterior cross-vein ; on the costa, between the

stigma and the end of the second vein, three hyaline incisions; in the first posterior cell, above the

posterior cross-vein, a hyaline dot.

Length 3 millim.

This species also does not differ much from those preceding; from E. mediuna it is distinguished by the three

hyaline costal spots, which form, together with the similar spots under them, a rather regular triangle,

the tip of which is a subtrigonal spot in the first posterior cell, just above the posterior cross-vein. The

femora are not blackish. The ovipositor is flattened and shining black.

Hab. Muxico, Chilpancingo 4600 feet, and Xucumanatlan 7000 feet, both in

Guerrero (H. H. Smith).

Three female specimens.

TEPHRITIS. A419

| TEPHRITIS.

Tephritis, Latreille, Hist. Nat. Crust. et Ins. xiv. p. 389 (1804).

J. The fuscous pattern of the wings covering the small cross-vein as well

as the posterior cross-vein. . 2... ee ee ee ee ee

_ The fuscous pattern of the wings at most covering one of the cross-veins. 4.

2. Tips of the wings fuscous, without hyaline incision or spot. . . . . finalis, Low.

Tips of the wings with a hyaline incision or spot between the third and

fourth veins . . . ., a SP

3. Beyond the stigma three hyaline costal spots . . . . . . . . . staminea, v. d. W.

Beyond the stigma two hyaline costal spots. . . . . . . . . . subradiata, v. d. W.

4, Stigma clear, the tip only infuscated . . one we oe ee.) 6eancellata, v. d. W.

Stigma blackish, sometimes with one or two small white dots. . . . 5.

5. First posterior cell with a rather large hyaline apical dot . . . . . 6.

First posterior cell without hyaline apical dot . . 2. 2. 2... 1. OY.

6. Femora, the tip excepted, black; stigma with a white dot . . . . . fibulata,v.d. W.

Femora rufous; stigma without a whitedot . . . . . . . . . obsoleta,v.d. W.

7. Anterior half and tip of the wings fuscous, with some hyaline dots only;

stigma without white dots . . . .... . . . . semifusca, v. d. W.

Wings near the stigma with a large fuscous spot, which is broadly

separated from a second fuscous spot at the tip; stigma with two

white dots . 2. 2. 1. ee ee ee ee ee ee ee tntricata, v. A.W.

1. Tephritis finalis. (Tab. XII. fig. 22, wing.)

Trypeta finalis, Low, Dipt. Amer. Sept. Cent. 11. no. 78°; Monogr. Dipt. N. Amer. ill. p. 296,

t. 11. fig. 47; Ost. Sacken, Western Diptera, p. 193°; Gigl.-Tos, Mem. R. Accad. Sci. di

Torino, ser. 2, xlv. (sep.) p. 54°.

Hab. Norts America ~*.—Mexico4, Ciudad in Durango (Forrer), Jalisco (Schumann),

Chilpancingo, Amula, and Omilteme in Guerrero (H. H. Smith), Orizaba (H. H. Smith

& F, D. Godman).

Several specimens, including both sexes. They agree perfectly with Low’s description

and figure. In some of the males the abdominal segments show more or less distinctly

a pair of brownish spots.

9. Tephritis staminea, sp.n.g. (Tab. XII. fig. 23, wing.)

Cinereous; head and legs yellowish-rufous ; the fuscous pattern of the wings covering the small and posterior

cross-veins ; stigma clear, its distal half brown; beyond the stigma three hyaline costal spots ; at the tip

of the first posterior cell a hyaline dot.

Length 3°25 millim.

Front as broad as the eyes, rufous, the sides and anterior border yellow ; frontal bristles black ; postvertical

bristles yellow ; face and cheeks yellow ; the face perpendicular; the cheeks rather broad ; oral margin

not prominent. Antenne rufous; third joint elliptic, reaching beyond the middle of the face.

Proboscis and palpi pale rufous. Thorax, scutellum, and abdomen cinereous, with yellow hairs ;

3h 2

420 DIPTERA.

scutellum with four bristles, its hind-border rufous; metanotum grey; tip of the abdomen rufous, with

some black bristles on each side. Legs and halteres rufous. Wings rather long and narrow, with a

minute costal spine ; the base and a large portion of the hind margin are hyaline, with some brownish

cross-lines ; the proximal half of the stigma is clear; the fuscous coloration commences at the tip of the

stigma, and extends in an oblique direction over the small and posterior cross-veins; beyond the stigma

there are three subquadrate hyaline costal spots, which form, in connection with two spots between the

second and third veins, and with an oval spot in the first posterior cell, the large hyaline triangle which

is usual in the genus Tephritis; round the tip of the wings there are several hyaline incisions, and among

them a hyaline dot between the third and fourth veins ; in the first posterior cell are some small clear

dots.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman).

A single male specimen. The coloration of the wings is much like that of 7. jinalis,

except that there is a hyaline spot at the tip.

3. Tephritis subradiata, sp. n., ¢. (Tab. XII. fig. 24, wing.)

Cinereous ; head and legs rufous; the fuscous pattern of the wings covering the small and posterior cross-

veins ; stigma blackish ; beyond the stigma two hyaline costal spots; a similar spot at the end of the

first posterior cell.

Length 3 millim.

Head rounded, yellowish-rufous ; front as broad as the eyes; face slightly excavated ; oral margin a little

prominent ; cheeks rather broad. Antenne rufous; third joint oval, reaching to the middle of the face.

Proboscis and palpi rufous. Thorax and scutellum blackish, with yellow hairs; upper portion of the

pleuree and hind border of the scutellum rufous; scutellum with four bristles; metanotum grey.

Abdomen cinereous, with yellow hairs, and indistinct narrow yellowish hind-borders to the segments ;

apical segment as long as the penultimate. Legs rufous, rather stout. Halteres pale rufous. Wings

long and narrow, with a small costal spine ; the base and the basal half of the hind margin are hyaline,

beyond the small basal cells interrupted by some fuscous cross-lines; the stigma is blackish, with a

rather indistinct clear dot at the tip; the fuscous coloration of the wings commences at the stigma and

includes both cross-veins ; beyond the stigma there are two hyaline incisions reaching to near the third

vein ; similar incisions are visibie round the apex of the wings; a rather large hyaline dot is in the first

posterior cell, nearly above the posterior cross-vein ; there are also in the fuscous coloration several small

clear dots, of which two or three are placed on each side of the small and posterior cross-veins.

Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith).

A single male specimen. The coloration of the apex of the wings forms a somewhat

radiated pattern, and this species therefore forms a transition to the genus Ewaresta.

4, Tephritis cancellata, sp.n..¢ @. (Tab. XII. fig. 25, wing.)

Cinereous ; abdomen with brown spots; head and legs rufous; wings reticulated with fuscous; stigma clear,

blackish at the tip; small cross-vein not bordered with fuscous.

Length 3 millim.

Head rufous; front as broad as the eyes, slightly narrower towards the base of the antenne ; frontal bristles

black ; a row of yellow bristles on the vertex behind the eyes; face a little retracted ; cheeks narrow ;

oral margin not prominent; occiput cinereous. Antenne rufous, reaching to beneath the middle of the

face. Proboscis and palpi rufous. Thorax, scutellum, and abdomen cinereous. Abdomen elliptical; the

second and each of the following segments with two brown spots (in the female these spots less distinct) ;

hind-borders of the segments with yellow bristly hairs ; ovipositor of the female flattened, as long as the

last two or three segments together. Legs and halteres rufous. Wings rather long and narrow, with a

TEPHRITIS. 431

fuscous, not very obscure reticulation; the base, to a little beyond the inferior basal cells, hyaline; the

stigma yellowish, with the tip only fuscous: beyond the stigma there is a large subquadrate, hyaline

spot, reaching tc the fourth vein, and interrupted by some narrow cross-stripes ; it includes the small

cross-vein, which is not at all bordered with fuscous ; the posterior cross-vein, on the contrary, is wholly

covered by the fuscous coloration: in the first basal cell, the discal cell, and the apical portion of the

wings are several hyaline dots of different sizes, one of them being at the tip between the third and fourth

veins ; there are also some very large hyaline dots at the hind margin.

Hab. Mexico, Amula, Xucumanatlan, and Omilteme, 6000 to 8000 feet, all in

Guerrero (H. H. Smith).

Two males and two females.

5. Tephritis fibulata, sp.n.,¢ ¢@. (Tab. XII. fig. 26, wing.)

€inereous ; head and legs rufous ; femora, except at the tip, black ; the fuscous reticulation of the wings not

covering the small cross-vein ; stigma with a white dot; a hyaline apical dot between the third and

fourth veins.

Length 2°5 millim.

Head rufous; front a little broader than the eyes, with parallel sides and whitish orbits; frontal bristles

black ; face excavated; oral margin slightly prominent ; cheeks rather broad, yellowish-white. Antenne

rufous, reaching to near the oral margin. Proboscis and palpi rufous. Thorax, scutellum, metanotum,

and abdomen cinereous; thoracic dorsum sometimes with three indistinct dark stripes and with yellowish

hairs ; the sides of the thorax with black bristles ; scutellum with four bristles ; abdomen elliptical, each

segment with two brown spots, which, however, are often inconspicuous ; ovipositor of the female shining

black, as long as the last three segments together. Coxe and femora black; the tips of the femora, the

tibie, and the tarsi rufous. Halteres rufous. Wings elongate; the stigma blackish, with a white dot ;

the fuscous reticulation limited to three spots, one adherent to the stigma, the second along the posterior

cross-vein, and the third in the apical region; the spot on the stigma reaches the fourth vein, and is

perforated by two hyaline dots in the cubital cell and two others in the first basal cell; beyond the

stigma is a large hyaline portion, in the middle of which is the slightly thickened small cross-vein, without

any fuscous border; the fuscous apical portion of the wings is interrupted by some large hyaline dots

along the margin (one between the costa and the second vein, two between the second and third veins,

and one at the extreme tip between the third and fourth veins), and by several smaller dots placed more

inwards ; the base and nearly the whole posterior margin of the wings are hyaline, with some small fuscous

stripes and spots representing fragments of reticulation; on the inner side of the posterior cross-vein are

two small clear dots.

Hab. Mexico, Orizaba (H. H. Smith & PL. D. Godman).

Four specimens.

6. Tephritis obsoleta, sp.n.,?. (Tab. XII. fig. 27, wing.)

Cinereous ; head and legs rufous; the fuscous reticulation of the wings not covering the small cross-vein;

stigma without a white dot; a hyaline apical spot between the third and fourth veins.

Length 2°5 millim.

Closely allied to the preceding species (7. fibulata), but without a white dot in the stigma, and also differing

in the colour of the femora, which are not black. The thoracic dorsum shows no trace of stripes; the

abdomen is brownish-cinereous, and the spots on it are indistinct ; the ovipositor is shorter, as long as

the last two segments ; the legs, including the coxe, are rufous; the knees of the middle pair have a

whitish reflection. The pattern of the wings is nearly the same as in 7. fibulata: in the middle of the

costa is a quadrate fuscous spot (which in 7’. fibulata is represented by a narrow cross-stripe only); the

422 DIPTERA.

large hyaline marginal dots round the apex of the wings are fewer in number, as there is only one

(instead of two) between the second and third veins.

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman).

A single female specimen.

7. Tephritis semifusca, sp.n.,¢. (Tab. XII. fig. 28, wing.)

Cinereous ; legs rufous; anterior half and tip of the wings fuscous, interrupted only by some clear dots ;

stigma without white dots.

Length 3 millim.

Front cinereous, broader than the eyes, slightly narrower anteriorly ; frontal bristles brown ; face and cheeks

yellowish, the face inferiorly a little prominent ; cheeks narrow. Antenne brownish-rufous, reaching to

the middle of the face. Proboscis and palpi pale rufous. Thorax cinereous; scutellum somewhat

reddish, with four bristles. Abdomen ovate, brownish-cinereous, with black cross-bands, which are

interrupted in the middle. Legs and halteres yellowish-rufous. Wings elongate; the black stigma with

a clear line at the end of the auxiliary vein, but no white dots; except at the base, the anterior half of

.the wings is fuscous, with some hyaline dots; in the costal cell there are two brownish spots, one

bordering the humeral cross-vein, the other between it and the stigma; immediately beyond the stigma

is a hyaline spot, not reaching the second vein ; further along the costa are three small clear dots, and

between the second and third veins two larger hyaline dots; at the tip of the wings there is no hyaline

dot; the small cross-vein has a fuscous border, in which on each side are two small clear dots; in the

hyaline portion of the wings are some small spots or fragments of reticulation.

Hab. Mexico, Ciudad in Durango (forrer).

Two males.

8. Tephritis intricata, sp.n.,@. (Tab. XII. fig. 29, wing.)

Cinereous; abdomen with blackish spots; wings with two large fuscous spots, one near the stigma and the

other at the tip, both interrupted by hyaline dots, the stigma with two white dots.

Length 3 millim.

Closely allied to the preceding (7. semifusca). The front and the thorax a little more rufous; the blackish

cross-bands of the abdomen more distinct and in the form of two spots on each segment. The coloration

of the wings somewhat different, the fuscous border being largely interrupted at the middle of the costa

and forming two large spots, one in the vicinity of the stigma, the other at the apex; in the stigma are

two white dots; at the tip of the wings there is no hyaline dot.

Hab. Mexico, Ciudad in Durango (forrer).

Three females. I should be inclined to refer them to 7. semifusca, if the markings

of the wings were not so strikingly different.

CARPHOTRICHA.

Carphotricha, Low, Europ. Bohrfliegen, p. 77 (1862).

1. Carphotricha culta, (Tab. XII. fig. 30, wing.)

Trypeta culta, Wiedem. Aussereur. zweifl. Ins. ii. p. 486+; Low, Monogr. Dipt. N. Amer. i. p. 94,

t. 2. fig. 297; ili. p. 276, t. 11. fig. 3°; Osten Sacken, Western Diptera, p. 192%.

CARPHOTRICHA.—EUARESTA., 423

| Carphoiricha culta, Snow, Kansas University Quarterly, ii. p. 169°; Gigl.-Tos, Mem. R. Accad.

Sci. di Torino, ser. 2, xlv. (sep.) p. 54°.

Acinia fimbriata, Macq. Dipt. Exot. ii. 3, p. 228, t. 31. fig. 5

Hab. Nortu America !~>7,—Mexico ®, Ciudad in Durango 8100 feet (Forrer), Jalisco

(Schumann), Chilpancingo 4600 feet, and Omilteme 8000 feet, both in Guerrero

(H. H. Smith), Orizaba (H. H. Sinith & F. D. Godman).

Several specimens of both sexes.

EUARESTA.

- Euaresta, Low, Monogr. Dipt. North Amer. iii. p. 296 (1873).

1. On the costa, immediately beyond the stigma, three hyaline incisions

in the fuscous coloration of the wings . . . . . . . . . « erenulata,v.d. W.

On the costa, beyond the stigma, only two hyaline incisions in the

fuscous coloration of the wings . . . - oe ~ 2 2

2. In the central portion of the wings, between the third and fourth veins,

on each side of the small cross-vein, a rather large hyaline dot . . 38.

One of these dots obliterated . 2. 2. 1 1. 1 eee we eee 8D

3. The two costal incisions not prolonged beyond the second vein . . . timida, Low.

The two costal incisions more or less prolonged beyond the second

vein 2. ew ew ee ee re

4. The first incision only prolonged by a minute hyaline dot. . . . . rufula,v.d. W.

Both incisions prolonged by rather large hyaline dots between the

second and third veins. . . . 2. . . . oe ee ew ee angustipennis, v. d. W,

5. Hind margin of the wings hyaline in its basal half ; in the discal cell

and its vicinity several punctiform clear dots . . . . . . . . Sscttula, v.d. W.

Hind margin of the wings fuscous, with a row of small semicircular

hyaline incisions ; in the apical region several punctiform clear dots. sobrinata, v. d. W.

1. Euaresta crenulata, sp. n., 3

Cinereous ; head and legs ycllowish-rufous ; abdomen variegated with black ; wings fuscous, with several clear

dots aud many marginal hyaline incisions, three of which are on the costa immediately beyond the stigma.

Length 5 millim.

Head yellowish-rufous ; front posteriorly broader than the eyes, slightly attenuated towards the base of the

antenne; frontal bristles brown; behind the eyes a row of yellow bristles; face perpendicular ; oral

margin not prominent; cheeks rather narrow; occiput inferiorly tumid. Antenne rufous; third joint

somewhat attenuated towards the tip, reaching to the middle of the face. Proboscis and palpi rufous.

Thorax and scutellum yellowish-cincreous, with yellow hairs; pleure and metanotum grey ; in the sides

of the thorax several long bristles, arising from black points; scutellum with four bristles, Abdomen

cinereous, with yellow hairs; second and following segments with blackish front-borders, which are

interrupted in the middle. Legs yellowish-rufous ; fore femora with a row of yellow bristles on the

underside. Halteres yellow. Wings rather broad; the base, including the second and third basai cells,

hyaline, with a scattered pale brownish reticulation ; the rest of the wings fuscous, with clear dots and

hyaline marginal incisions ; stigma blackish, with two white stripes near the end of the auxiliary vein

and a clear dot at the tip; immediately beyond the stigma there are three hyaline costal incisions; a

series of similar incisions around the tip and the hind margin of the wings; in the centre are several

424 | DIPTERA.

hyaline dots of different sizes, and some others closely connected form a large clear space between the

fourth and sixth veins, filling the middle of the discal cell ; in the first posterior cell is a blackish spot,

darker than the surrounding coloration. .

Hab. Mexico, Cuernavaca, Chilpancingo (H. H. Smith).

Five males.

2. Euaresta timida. . E. crenulata, 5 e W.

Trypeta timida, Low, Dipt. Amer. sept., Cent. ii. no. 76’; Monogr. Dipt. N. Amer. in. p. 311,

t. 10. fig. 25°.

Hab. Mexico !2, Orizaba (H. H. Smith & F. D. Godman), San Lorenzo, near Cordova

(M. Trujillo), Medellin and Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith) ;

Costa Rica, Caché (Rogers).

A long series of specimens of both sexes. The coloration of the wings agrees exactly

with Low’s description, except for a very slight difference :

in all the examples before me the first hyaline incision at the

end of the costa begins a little before the tip of the second

vein, whilst in Low’s figure it begins just at this point. The

identification, however, seems to be certain.

Low has described the male only. In the female the

abdomen is more uniformly blackish ; the ovipositor shining black, flattened, as long as

the last two segments together.

E. timida, Low.

8. Kuaresta rufula, sp. n., ¢ 2.

Rufous, with yellow hairs; wings fuscous, the base, two incisions beyond the stigma, a series of incisions

round the tip and along the hind margin, and some dots in the centre, hyaline.

Length 5 millim.

Head rufous ; front posteriorly broader than the eyes, slightly attenuated towards the base of the antenne ;

frontal bristles brown; behind the eyes a row of yellow bristles; face short, excavated; cheeks narrow.

Antenne, proboscis, and palpi rufous; the antennze reaching to the middle of the face. Thorax and

scutellum rufous; thoracic dorsum with yellowish hairs; scutellum with four bristles. Abdomen

somewhat flattened, rufous, with yellow hairs and some indication of brown dorsal spots; ovipositor of

the female shining brown, conical, as long as the last three segments together. Legs and halteres pale

rufous; underside of the fore femora with yellow bristles. Wings proportionately large, their coloration

very much as in the preceding species (E. timida); the base, including the second and third basal cells,

hyaline, with some traces of reticulation; the rest of their surface fuscous, with hyaline marginal

incisions and some hyaline dots; stigma black, with a clear line at the end of the auxiliary vein and one

or two clear dots; immediately beyond the stigma two hyaline incisions, the first of which is prolonged

by a small dot beyond the second vein ; round the tip of the wings six rather large incisions, and some

smaller unes along the hind margin ; on each side of the small cross-vein a rather large hyaline dot, and

some others in the discal cell and the third posterior cell.

Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith).

One male and one female.

E. rufula, v. d. W.

EUARESTA. 425

4, Kuaresta angustipennis, sp.n.,¢ 2.

Cinereous ; head and legs rufous; wings fuscous, the base, two incisions beyond the stigma, several incisions

around the tip and along the hind margin, and some dots in the centre, hyaline.

Length 4°5 millim.

Head pale rufous; front much broader than the eyes, flattened ; frontal bristles long, brown ; behind the

eyes arow of yellow bristles; face slightly excavated; cheeks broad, their inferior portion equalling

more than half the longitudinal diameter of the eyes. Antenne rufous; third joint rounded at the tip,

reaching to the middle of the face. Proboscis and palpi rufous, the palpi long and slender. Thorax,

scutellum, and abdomen cinereous; thoracic dorsum with yellow hairs; pleurs and metanotum more

rufous; in the sides ot the thorax some long black bristles; scutellum with four bristles. Abdomen

ovate, slightly convex ; ovipositor of the female shining brownish-black, as long as the apical segment

and truncated at the tip. Legs rufous; fore femora with bristles on the upper and under sides. Halteres

pale rufous ; tegule distinct. Wings narrower than in the preceding species (4. rufula): stigma black,

without clear dots ; the base hyaline, with two brownish stripes on the costa between the humeral cross-

vein and the stigma, otherwise not reticulated; beyond the stigma two hyaline incisions, which are

prolonged by two rounded dots between the second and third veins; several incisions round the tip and

along the hind margin of the wings; on each side of the small cross-vein a rather large hyaline dot; two

similar dots in the first posterior cell, at the inner side of the apical incision, and three dots of different

sizes in the discal cell.

Hab. Mexico, Mexico city (H. H. Smith).

Five specimens (four males and one female).

5. Euaresta scitula, sp. n., ¢. H. angustipennis, v. d. W.

Black; head and legs yellowish; wings fuscous, with several hyaline incisions, the basal half of the hind

margin hyaline, in the discal cell and its vicinity many small clear dots,

Length 4°5 millim.

Front yellowish-cinereous, broader than the eyes, with nearly parallel sides ; frontal bristles black ; behind

the eyes a row of yellow bristles ; face and cheeks yellow; the face slightly excavated; oral margin

broad, not prominent. Antenne rufous, reaching to the middle of the face. Proboscis brown; palpi

black. Thorax, scutellum, and abdomen black, but appearing cinereous, on account of a short yellowish

pilosity ; abdomen conical, the ovipositor rather short, truncated, shining black on the dorsal, rufous on

the ventral side. Legs and halteres yellowish-rufous. Wings rather long and narrow; the fuscous

coloration extended to the costal cell, a stripe next the humeral cross-vein and a clear dot excepted ;

the stigma black, without clear dots ; immediately beyond the stigma a subquadrate hyaline incision, and

at some distance from it a similar incision of triangular shape; round the tip of the wings and at the

apical portion of the hind margin are the usual hyaline incisions, those between the second and third

veins no more than small dots; a rather large hyaline dot is in the first posterior cell, nearly above the

posterior cross-vein ; several punctiform clear dots are in the discal cell and its vicinity ; the basal half

of the hind margin is hyaline, without reticulation.

Hab. Mexico, Northern Sonora (Morrison).

A single female specimen.

6. Euaresta sobrinata, sp. n., 2 (?¢ ). E. scitula, v. d. W.

Thorax cinereous; abdomen black; head and legs yellowish-rufous; wings fuscous, with hyaline incisions

and many small clear dots, especially in the apical region.

Length 3°5 millim.

Front a little broader than the eyes, rufous, anteriorly and at the orbits whitish; frontal bristles black;

behind the eyes a row of yellow bristles ; face and cheeks yellowish ; oral margin not prominent ; cheeks

BIOL. CENTR.-AMER., Dipt., Vol. I1., February 1900. 37

426 DIPTERA.

rather narrow ; occiput whitish-grey. Antenns, proboscis, and palpi rufous; the antenne reaching to

beyond the middle of the face. Thorax and scutellum cinereous; thoracic dorsum with yellow hairs.

Abdomen conical, shining black; ovipositor of the same colour, flattened, truncated, as long as the last

two segments united. Legs pale rufous; fore femora with some yellow bristles on the underside.

Halteres yellow. Wings rather broad; the base, including the second and third basal cells, hyaline, with

some brownish spots ; the rest of the surface fuscous, with hyaline marginal incisions and clear dots of

different sizes ; stigma black, with a clear stripe at the end of the auxiliary vein; beyond the stigma two

hyaline incisions, the second of which is prolonged by a large hyaline dot between the second and third

veins ; at the tip of the wings some large hyaline incisions; the hind margin fuscous, with a row of

small semicircular incisions; a white dot between the first and second veins, just under the end of the

costal cell; a similar dot in the first basal cell, and a very large one between the fifth and sixth veins ;

several small clear dots are in the discal cell and in the apical portion of the wings: in the first posterior

cell is a blackish callous spot.

Hab. Mexico, Xucumanatlan in Guerrero (H. H. Smith).

A single female. ‘To the same species must be referred a

male (without head) from Orizaba (H. H. Smith). This

species has similarly-coloured wings, but the abdomen is

cinereous, with two black spots on each segment, the apical &. sobrinata, vd, W.

one being shining black.

URELLIA.

Urellia, Robineau-Desvoidy, Essai sur les Myodaires, p. 774 (1830).

1. Proximal half of the wings with a faded greyish reticulation. . . . . . abstersa, Low.

Proximal half of the wings hyaline, without reticulation . . . . . . . Q,

2. In the discal cell two fuscous rays . . . 2... ww ee, polyclona, Low.

In the discal cell only a single fuscous ray. . . 3.

3. The black spot on the distal half of the wing extended inwards over ‘the

small cross-vein and covering the stigma . . . . . eugenia, v. d. W.

The black spot on the distal half of the wings not extended inwards, ‘the

stigma only crossed by an oblique ray . . A.

4. Small cross-vein not covered by the black spot on the distal half of ‘the

wings; fifth vein not spotted . . . . . . . . . solaris, Liw.

Small cross-vein covered by the black spot on the distal half of the wings; a

fuscous dot on the fifth vem. . 2. 2... 2... et; vicina, v. d. W..

1. Urellia abstersa.

Trypeta abstersa, Liw, Dipt. Amer. sept., Cent. ii. no. 771; Monogr. Dipt. N. Amer. iii. p. 322,

t. ll. fig. 7°.

Hab. Norta America’,—Mexico, Mexice city (H. H. Smith).

—CuBa *.

A single female specimen of this species has been received

from Mexico. U. abstersa, Low.

2. Urellia polyclona.

Trypeta polyclona, Low, Monogr. Dipt. N. Amer. iii. ps 324 '.

URELLIA. 427

Hab. Mexico, Northern Sonora (Morrison), Orizaba

(H. H. Smith & F. D. Godman).—Cosa *.

Three specimens (one male and two females).

U. polyclona, Low.

3. Urellia eugenia, sp. n.,¢ ¢.

Rufous ; the black spot of the wings extended inwards over the small cross-vein and covering the stigma,

Length 2°5 millim.

This species differs from all others of the genus by its rufous coloration and the extension of the black spots

on the wings. Head, antenna, proboscis, and palpi rufous; front flattened, broader than the eyes,

anteriorly slightly narrowed ; frontal bristles brown; behind the eyes a row of yellow bristles ; face

short ; cheeks rather narrow; oral margin slightly prominent. Antenne short. Thorax and abdomen

greyish, but appearing rufous on account of a dense ochraceous dust, and with short yellow hairs ;

scutellum with four bristles; ovipositor of the female shining black, truncated, as long as the three

preceding segments together. Legs and halteres rufous. Wings long and narrow, whitish-hyaline ; the

usual subapical blackish spot is enlarged inwards to near the origin of the third vein, and covers the small

eross-vein and the stigma, this latter with a small clear dot at the tip; there are no rays from the spot

towards the costa, but instead of them there is, beyond the stigma, an oblong hyaline incision ; round the

apical margin of the wings there are seven rays: the first of them runs obliquely to the anterior margin ;

the second and third form a border on the ends of the third and fourth veins; the fourth and fifth rays

cross the second posterior cell; the sixth forms a border to the posterior cross-vein; the seventh arises

from the fourth vein, between the two cross-veins, and goes in oblique direction towards the hind margin.

On the costa, before the end of the second vein, are two small white dots; a similar dot is in the cubital

cell, just under the tip of the hyaline incision ; there are also three hyaline dots in the first posterior cell,

a larger one next to the small cross-vein, and two others inwards of the rays on the third and fourth veins.

Hab. Mexico, Chilpancingo 4600 feet and Amula 6000

feet, both in Guerrero (7. H. Smith).

One male and two females.

l i U. a, v. d. W.

A, Urellia solaris. eugenia, V

Trypeta solaris, Low, Monogr. Dipt. N. Amer. i. p. 84, t. 2. fig. 19"; iii. p. 325, t. 10. fig. 19°.

Urellia solaris, Gig].-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv, (sep.) p. 54°.

Hab. Nortu America ! 2.—Mexico 2, Omilteme in Guerrero

8000 feet (H. H. Smith).

A single female specimen.

5. Urellia vicina, sp. 0. U. solaris, Low.

Grey ;- head and legs yellowish-rufous ; scutellum with two bristles; the black spot on the wings including

the small cross-vein, a small fuscous dot on the middle of the fifth vein.

Length 2 millim.

Front broader than the eyes, greyish, at the sides and anteriorly pale rufous; frontal bristles black; on the

vertex behind the eyes a row of yellow bristles; face and cheeks yellowish-rufous; oral margin slightly

prominent. Antenne rufous, reaching to the middle of the face. Proboscis and palpi pale rufous.

Thorax and scutellum grey ; pleure somewhat rufous. Abdomen greyish-cinereous, with whitish hairs ;

ovipositor shining black, as long as the last two segments together. Legs yellowish-rufous. Wings

elongate, whitish-hyaline, beyond the middle with a large, quadrate black spot, between the costa and

the fourth vein, the spot including the small cross-vein and emitting eight rays to the margin: the first

428

Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman).

Two females. I should have identified this species with

U. actinobola, Low (Monogr. Dipt. N. Amer. iii. p. 326),

which also has a fuscous dot on the fifth vein, if Low in

his

DIPTERA.

ray runs very obliquely from the small cross-vein to within the stigma; the second is shorter and reaches

the costa between the stigma and the spot itself; the two following rays are at the tip of the wings and

border the end of the third and fourth veins ; the fifth and sixth rays cross the second posterior cell; the

seventh forms a border’along the posterior cross-vein; the eighth ray is a short one, under the fourth

vein, between the two cross-veins, but does not reach the fifth vein. In the black spot are four white

dots, one under the end of the second vein, and three in the first posterior cell: one between the cross-

veins, and two at the base of the two apical rays. On the middle of the fifth vein is a small fuscous dot.

U. vicina, v. d. W.

description had not said there was no trace of brownish

colour round the small cross-vein.

he following Trypetine, all from Mexico, are unknown to me :—

Anastrepha suspensa, Low, Monogr. Dipt. N. Amer. i. p. 69, t. 2. fig. 15; ii.

p- 222, t. 10. fig. 15 (Zrypeta); Schiner, Dipt. Novara Reise, p. 263

(Anastrepha) ; Gigl.-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.)

p-. 59 (Aerotoxa).—(Low had the species from Cuba, Schiner from South

America, Giglio-Tos from Mexico.)

ludens, Low, Monogr. Dipt. N. Amer. iii. p. 223, t. 11. fig. 19 (Zrypeta).

Spilographa tetanops, Low, 1. c. p. 245, t. 11. fig. 15. (Low has established for

this species a separate genus, Gdicarena, which, however, seems to be not

essentially different from Spilographa.)

Molynocelia lutea, Gigl.-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.)

p. 60, fig. 23.

Icterica lichtensteinit, Wiedem. Aussereur. zweifl. Ins. 1. p. 497; Low, Monogr.

Dipt. N. Amer. i. p. 92, t. 2. fig. 25; iii. p. 289, t. 11. fig. 19 (Zrypeta).

Blepharoneura regina, Gig].-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.)

p- 56, fig. 16.

saga, Gigl.-Tos, 1. c. p. 56, fig. 19.

io, Gigl.-Tos, 1. c. p. 57, fig. 18.

diva, Gigl.-Tos, 1. c. p. 57, fig. 17.

Acrotenia otopappi, Doane, Journ. New York Ent. Soc. vii. p. 183, t. 3. fig. 8

(Sept. 1899).—Found dead in a dried specimen of Otopappus acuminatus.

Euaresta mexicana, Wiedem. Aussereur. zweifl. Ins. ii. p. 511; Low, Monogr. DPE

N. Amer. iii. p. 317, t. 10. fig. 28 (Zrypeta).

scutellata, Wiedem. 1. c. ii. p. 494 (Zrypeta).—A doubtful species, as ‘the

type is lost (see Low, Monogr. Dipt. N. Amer. iii. p. 337).

audax, Gigl.-Tos, 1. c. p. 55, fig. 25.

OLFERSIA. 429

[N.B.—We have not succeeded in finding any entomologist willing to undertake the

enumeration of the remaining subfamilies of the ‘“ Muscide Acalyptere,” viz. the

Agromyzine, Borborine, Chloropsine, Drosophiline, Ephydrine, Geomyzine, and

Sapromyzin, nor the family Phoride *.—Ep. |

PUPIPARA.

Fam. HIPPOBOSCIDA +.

OLFERSIA.

Olfersia, Wiedemann, Aussereur. zweifl. Ins. ii. p. 605 (1830).

In the Mexican collections before me there are representatives of three species of

this genus, which may be distinguished as follows :—

1. Third vein reaching the costa at two-thirds of its length; first vein

ending beyond the small cross-vein. . . Lo . . . . vulturis, v. d. Wulp.

Third vein reaching the costa at three-fourths of its length ; first vein

ending above or before the small cross-vein . . . . . . ee

2. Auxiliary vein complete, ending in the costa; front broader than the

eyes . . ee Loe . toe ee we ee). COriacea, v. d. Wulp.

Auxiliary vein incomplete, not reaching the costa; front not broader

than theeyes. . . 2. 1 ee ee ee ee ee ew engustifrons, v. A. Walp.

1. Olfersia vulturis, sp.n., 9? (Tab. XIII. figg. 1, head; 1 a, wing.)

Dark brown ; front and eyes shining; wings brownish; first vein ending beyond the small cross-vein ; third

vein reaching the costa at two-thirds of its length.

Length 6°5 millim.

Nearly unicolorous dark brown; the eyes reddish-brown and shining ; front somewhat shining, with an

impressed line on both sides along the eyes and several impressions in the middle. Shoulders conitorm,

exserted ; transverse suture of the thorax very distinct. Legs robust; femora thick, the hind pair longer

than the others; claws black. Wings with a brown tinge; first vein reaching the costa distinctly beyond

the small cross-vein, which stands before the middle of the wing’s length; second section of the costa

(from the humeral cross-vein to the end of the auxiliary vein) nearly as long as the third section (from

the end of the auxiliary vein to the end of the first vein); the two following sections (from the first to

the second vein and from the second to the third vein) shorter and of nearly equal length; the third vein

ending on the costa at two-thirds of its length; second basal cell incomplete and retracted towards the

base of the wing.

Hab. Costa Rica, Rio Sucio (Rogers).

Two specimens, one of which is labelled “ parasite of Vulture.” This species seems

to be allied to Ornithomyia villadw, Dugés, which also belongs to the genus Olfersia ;

* [These groups were undertaken by Van der Wulp, and the unworked material was returned to us after

his death. Fully half the specimens, however, were so injured on the return journey as to be useless.—Ep. |

+ [The MSS. of this family was sent to us, together with that of the Supplement, by Dr. Meijere, after Van

der Wulp’s death.— Ep. |

BIOL. CENTR.-AMER., Dipt., Vol. IL, Aprid 1903. ak

450 DIPTERA.

but its head is without metallic-greenish tint,and the legs are of the same colour as

the body, whilst in O. villade@ the two posterior pairs are black.

2, Olfersia coriacea, sp.n., 9% (Zab. XIII. figg. 2, head and thorax;

2 a, wing.)

Brown, with the legs rufous and the wings brownish ; first vein ending above the small cross-vein; third vein

reaching the costa at three-fourths of its length.

Length 4-5 millim.

Dark brown ; the eyes, the front (except its middle part), and the thorax glossy. Thorax before the trans-

verse suture with two impressions on the disc; on the shoulders a rufous coniform prominence, with some

short bristles at the tip ; before the sutellum a longitudinal impressed line and on each side a rather

deep impression with some small scratches. Legs rufous, the hind femora elongate. Wings brownish ;

first vein ending above the small cross-vein, which stands nearly at the middle of the wing’s length ;

the auxiliary vein ending much nearer the base of the wing; third vein reaching the costa at three-

fourths of its length; second basal cell half as long as the superior basal cell; beneath the end of the

third vein a brown oblique shadow (in one of the specimens this is very distinct, in the other it is less

conspicuous). Pe 2 omeys 0. aa , HAS Gay ef Bou wht, (AOR

Hab. Mexico, Presidio (Forrerys GUATEMALA, Mirandilla (Champion). ve as whe ra

Moths og PX

Two specimens.

8. Olfersia angustifrons, sp.n., ¢ 9. (Tab. XIII. figg. 3, head; 3a, wing.)

Dark brown or blackish, with the legs obscure reddish and the wings brownish-hyaline ; frst vein ending

before the small cross-vein ; third vein reaching the costa at three-fourths of its length ; auxiliary vein

incomplete.

Length 4 millim.

More obscurely coloured than the preceding, and with the auxiliary vein (which accompanies the first vein for

almost half its length) not reaching the costa; the front is scarcely as broad as the eyes and has a narrow

glossy space at the sides and a glossy plate behind, which is notched in the middle; the proboscis is

longer. The coniform prominences on the shoulders and the transverse suture of the thorax are distinct,

but the other impressions of the latter are less conspicuous. The legs are rufous; the hind femora

elongated. The first vein ends distinctly before the small cross-vein, which stands nearly at the middle

of the wing’s length ; the second basal cell is much shorter than the superior one and retracted to near the

base of the wing.

Hab. Mexico, Teapa in Tabasco (H. H. Smith); Costa Rica, Rio Sucio (Rogers).

A male from Mexico and a female from Costa Rica.

Two other species of this genus have been described from Mexico :—

Olfersia mexicana, Macq. Dipt. Exot. ii. 3, p. 278.

villade, Dugés, La Naturaleza, (2) i. p. 20, t. 3. fig. 3 (Ornithomyia).

The latter evidently belongs to the genus Olfersia, as the ocelli are wanting and the

figure does not show the third basal cell (anal cell), which in Ornithomyia is always

present. In these two species the head is metallic, a character separating them from

the three others described above.

ORNITHOMYIA. 431

ORNITHOMYIA.

Ornithomyia, Latreille, Hist. Nat. Crust. et Ins. xiv. p. 402 (1804).

Of this genus also I have seen three Mexican species, one of them being identical

with the common European 0. avicularia, L. The principal characters distinguishing

them are :—

1. First vein ending in the costa distinctly before the small cross-vein . . avicularia, L.

First vein ending in the costa just above the small cross-vein . . . 2.

2. Fourth portion of the costa (between the first and second veins) much

longer than the fifth portion (between the second and third veins) . . robusta, v. d. Wulp

Fourth portion of the costa as long as the fifth. . . . . . . . . pilosula, v.d. Wulp.

1. Ornithomyia avicularia, (Tab. XIII. fig. 4, wing.)

Hippobosca avicularia, Linn. Faun. Suec. no. 1922+; Fabr. Ent. Syst. iv. p. 415°; Syst. Antl.

p- 3388 °.

Ornithomyia avicularia, Meig. Syst. Beschr. vi. p. 232°; Schiner, Faun. Austr., Dipt. ii. p. 647°

Ornithomyia viridis, Meig. loc. cit. p. 233°.

Ornithomyia fringillina, Curt. Brit. Ent. xiii. p. 5857

Hab. Costa Rica, Rio Sucio (Rogers).—Evurors !~“,

A single female.

2. Ornithomyia robusta, sp.n, ¢ 2. (Tab. XIII. figg. 5; 5a, head;

5 b, wing; 96, leg.)

Brown ; front, antenne, and legs rufous; wings brownish-hyaline ; first vein ending in the costa above the

small cross-vein ; fourth portion of the costa much longer than the fifth.

Length 7 millim.

The ocelli are less conspicuous than in O. avicularia and only recognizable in the three impressed points on the

posterior frontal plate. Front rufous and, except the median space, very glossy, in the ¢ as broad as the

eyes, in the 9 much broader ; antenne coniform, rufous, and hairy. Thorax reddish-brown ; the humeral

prominences dentiform. Abdomen dark brown. Legs rufous; femora thick and, as well as the tibie,

with long bristly hairs; the foot-claws black, strong. Wings brownish ; first vein reaching the costa

above the small cross-vein, which stands distinctly before the middle of the wing; the auxiliary vein

reaches the costa near the end of the first vein, the second vein close to the termination of the third (the

third portion of the costa, that is, between the auxiliary and first veins, thus being very small and the

fourth portion very large and much longer than the fifth); the second basal cell is a little shorter than

the superior, and the cross-vein by which it is closed is often inconspicuous ; the inferior basal cell (anal

cell) is trigonal and rather distinct.

Hab. Mexico, Jalapa (Godman); Guatemata, Zapote (Champion); Costa Rica,

Caché (Rogers); Panama, Volcan de Chiriqui (Champion).

One male and four females. In its large size, general facies, neuration of the wings,

&c., this species much resembles 0. columbe, Wiedem., from Java, Borneo, &c., but is

probably distinct, the habitat being very different.

3k 2

432 DIPTERA.

3. Ornithomyia pilosula, sp. n., 9% (Tab. XIII. figg. 6, head; 6a, wing.)

Head and thorax rufous; abdomen dark brown; legs yellowish, hairy ; wings brownish-hyaline ; first vein

ending in the costa above the small cross-vein ; fourth and fifth portions of the costa nearly of the same

length.

Length 5:5 millim.

Agrees in most respects with the European O. avicularia: the front is broader than the eyes; the semilunular

plate before the antenne has a rather deep impression ; the ocelli are distinct ; the end of the auxiliary

vein is close to that of the first vein ; and the inferior basal (anal) cellis present andcomplete. It differs,

however, in having longer and more numerous hairs on the femora and tibie, the somewhat more elongate

form, and also in the neuration: the first vein ends in the costa just above the small cross-vein, the

latter being more retracted towards the base of the wing; the fourth portion of the costa (between the

first and second veins) is as long as the fifth (between the second and third veins).

Hab. Costa Rica, Volcan de Irazu (Rogers).

A single specimen.

The following Hippoboscide have been described from Mexico :—

Trichobius dugesit, Towns. Ent. News, ii. pp. 105, 106 (1891); iii. p. 177 (1892).

—Guanajuato.

Found by Dr. Alfred Dugés on a species of bat, Glossophaga soricina.

Lipoptena depressa, Say, var. mexicana, Towns. Ann. & Mag. Nat. Hist. (6) xx.

p. 289 (1897).—Paso de Telaya, Vera Cruz.

153 specimens taken, together with puparia, from the ventral region,

hind-quarters, and sides of a white-tailed deer, Cariacus virginianus,

var. mexicanus.

SUPPLEMENT*.

(ESTRIDH (p. 1).

CUTEREBRA (p. 1).

Mr. E. E. Austen, of the British Museum, has published some critical remarks on

the American species of this genus, for which he adopts the name Cutiterebra { Ann. &

Mag. Nat. Hist. (6) xv. pp. 877-396, xvi. pp. 147-155 (1895)], and he makes various

corrections in the synonymy of the Central-American forms. One new genus is added

by him from North-west Mexico.

BOGERIA.

Bogeria, Austen, Ann. & Mag. Nat. Hist. (6) xv. p. 391 (1895).

1. Bogeria princeps.

Bogeria princeps, Austen, loc. cit. p. 393, t. 18. figg. 5, 5 a, 6°.

Hab. Mexico, Médano Blanco, Santa Barbara Bay (Boger').

MUSCIDE (p. 2).

PHASINE (p. 8).

TRICHOPODA (p. 3).

This genus, as restricted by me in 1892, includes only those species which have the

apical cell of the wings closed and more or less petiolated, the others previously

referred to it, in which this cell is open, belong to Homogenia.

* [The MSS. of this Supplement, and the accompanying drawings reproduced on Tab, XIII., was sent to us

by Dr. J. C. M. de Meijere, of Amsterdam, shortly after Van der Wulp’s death, in 1899, This was completed

by the author long ago, and the specimens of most of the species sent back at the time. Brief diagnoses of

the new forms have already been published in the ‘ Tijdschrift voor Eutomologie,’ xxxv. pp. 183-195 (1892),

the fuller descriptions, precise localities, and some figures being reserved for the Supplement to this Volume.

This “paper” of v. d. Wulp’s has been criticised at length by Mr. C, H. Tyler Townsend, in the ‘ Canadian

Entomologist,’ xxv. pp. 165-168 (1893), and the late author appended to his MSS. Mr. Townsend’s remarks

[which are repeated here within square brackets | on the various species, in most cases without comment.—Ep. |

“e

/ 9

LT ; /

434 SUPPLEMENT.

The Central-American species now known to me may be distinguished in the

following manner :—

1. Abdomen black (in 7. nitidiventris the anus is rufous) . . . + 2.

Abdomen yellow or rufous, sometimes brown or black towards

the apex . . 4,

2. The black coloration of the. wings reaching the end of the apical

and discal cells . . . . lanipes, Fabr.

The black coloration of the wings not reaching to ‘the end of ‘the

apical and discal cells. . . - . . 8.

3. Anus rufous ; fringes of the hind tibiee black with yellow tips . . nitidiventris, v. d. Wulp.

Anus not rufous ; fringes of the hind tibia wholly black. . . . alipes, v.d. Wulp.

4, Scutellum yellow or rufous, usually blackish at the base. . . . 5.

Scutellum black . . . . 2 ee ew ee 6

5. A yellow spot in the blackish portion of the wings. . . . . «+ pennipes, Fabr.

No yellow spot in the wings . . . Loe . oe ee . 6Sguamipes, v. d. Wulp.

6. Thorax before the transverse suture with four black bands . . . nigripes, v.d. Wulp.

Thorax before the transverse suture with three black bands (seen

from behind). . ... . 7.

7. The black coloration of the wings ‘extending beyond the apical and

posterior cross-veins . . . Lo oo pyrrhogaster, Wiedem.

The black coloration of the wings not it extending beyond the apical

Trichopoda pennipes (p. 3).

Ocyptera ciliata, Fabr. Syst. Antl. p. 315°. .

Trichopoda ciliata, Wiedem. Aussereur. zweifl. Ins. ii. p. 273°; Macq. Dipt. Exot. ii. 3, p. 77,

t. 9. fig. 1°.

To the localities given, add :—Mexico, Orizaba (coll. Bellardt), N. Yucatan

(Gaumer).

Brauer and von Bergenstamm (Denkschr. Akad. Wiss. Wien, lvi. p. 147) and Tyler

Townsend (Proc. Ent. Soc. Wash. il. p. 187) regard 7. ciliata and T. pennipes (Fabr.)

as the female and male respectively of the same species, and I think this will prove to

be the case.

The last-mentioned author informs me that J. pennipes has been bred in North

America from a Hemipteron, Anasa tristis. |

Trichopoda pyrrhogaster (p. 3).

To the localities given, add :—Mexico, Atoyac (H. H. Smith).

3. Trichopoda lanipes.

Thereva lanipes, Fabr. Syst. Antl. p. 220°.

Trichopoda lanipes, Wiedem. Aussereur. zweifl. Ins. ii. p. 270°; Rob.-Desv. Essai sur les Myodaires,

p. 284°; Walk. List Dipt. Brit. Mus. iv. p. 696‘; Towns. Proc. Ent. Soc. Wash. ii. p. 138”.

DIPTERA. 455

Length 7°5 millim.

Front velvety-black, narrowed behind, in the male as broad as the eyes, in the female broader; sides of the

front, face, cheeks, and posterior orbits whitish ; beard white. Antenne black; third joint rounded, in

the female as long as the second, in the male a little longer. Proboscis dark brown; palpi rufous.

Thorax before the transverse suture velvety-black; the shoulders, two lines on the disc, and a narrow

border at the suture pale yellow (in such a manner that three quadrate black bands are formed); behind

the suture the thorax is somewhat shining; pleure black, with whitish reflections; scutellum and

abdomen black, slightly shining. Legs black; coxa on the front side with whitish reflections; base of

the middle and hind femora sometimes rufous ; the fringe of the hind tibie wholly black; foot-claws and

pulvilli rather elongate in the male, the claws rufous with black tips, the pulvilli yellow. Tegule yellow ;

halteres rufous. Wings largely black, the black coloration reaching the end of the apical and discal cells,

the hind border greyish; small cross-vein nearly on the middle of the discal cell; apical cross-vein

straight; posterior cross-vein distinctly curved.

Hab. Mexico, Acapulco, Rio Papagaio, Rincon, Chilpancingo, Atoyac (H. H. Smith).

A male and four females. Another male from Cuautla, Mexico, in the collection of

the late Prof. Bellardi, in Turin, seems to belong to the same species; it is, however,

larger (length 10 millim.), the black coloration of the wings extends a little beyond

the exterior cross-veins, and the coxee and the base of all the femora are rufous.

4, Trichopoda nitidiventris.

Trichopoda mtidiventris, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 183’.

Black ; face silvery-white; the transverse suture of the thorax and the indistinct lines before it whitish ;

abdomen shining ; tegula brown; wings black, with the hind border and the tip broadly whitish.

Length 10 millim.

Thorax velvety-black, abdomen shining black. Front narrower than the eyes; frontal band velvety-black,

the sides, like the face and cheeks, silvery-white; on both sides of the antenne a thin black line runs

from the frontal band to behind the vibrisse. Antenne black, the second joint reddish at the tip ; the

third joint oval, scarcely longer than the second. fPalpi brownish-red. On the thorax are indications of

white lines before the transverse suture, which is more conspicuously white-margined. Abdomen rather

convex, the anus dark rufous. Legs robust, piceous, the base of the femora dark rufous; front coxe

covered with a whitish down ; the hind tibiz with a very rough and rather long black fringe, the tips of

which are bright yellow ; foot-claws and pulvilli pale yellow, the claws with black tips. Tegule dark

brown ; halteres yellowish. Wings with the black coloration not reaching the end of the apical and

discal cells ; the apical cell closed a little before the wing’s tip.

Hab. Mexico!, Atoyac in Vera Cruz (/. H. Smith).

A single male specimen.

5. Trichopoda alipes.

Trichopoda alipes, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 183°.

Black ; humeral spots and two thoracic lines white; base of the middle and hind femora rufous ; wings black,

with the tip and hind margin broadly hyaline, the end of the costa yellowish.

Length 7°5 millim.

Front velvety-black, as broad as the eyes, narrower behind; face black, with silvery-white reflections.

Antenne black, somewhat elongate ; third joint more than twice as long as the second. Proboscis and

palpi black. Thorax before the transverse suture silvery-white, with three velvety-black bands (which

are so broad that the thorax may be described as black, with two white lines and white humeral spots) ;

436 SUPPLEMENT.

behind the suture shining black; pleurs black, with whitish reflections; scutellum rufo-piceous, with the

_ base black. Legs black; coxw with white reflections; base of the middle and hind femora rufous ; hind

tibia on the distal two-thirds with a broad black fringe; foot-claws and pulvilli elongate, the claws with

black tips. Tegule brownish. Wings with the black coloration not reaching the end of the discal and

apical cells; at the end of the costa yellowish, interrupted by the dark border of the third vein; small

cross-vein beyond the middle of the discal cell; apical cell closed and shortly petiolated ; apical cross-

vein straight ; posterior cross-vein slightly curved.

Hab. Mexico 1, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single male specimen.

6. Trichopoda squamipes. (Tab. XII. figg. 7, ¢; 7a, head.)

Trichopoda squamipes, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 184°.

Thorax black, with yellow humeral spots and two yellow stripes; scutellum and abdomen yellowish-rufous ;

legs partly rufous; wings black, with the hind margin subhyaline.

Length 8 millim.

Front velvety-black, narrower than the eyes; face silvery-white, Antenne dark rufous, the basal joints and

the anterior border of the third joint brown; the third joint twice as long as the second. Proboscis

black ; palpi brown or somewhat rufous. Thorax anteriorly velvety-black, with yellow humeral spots,

two yellow lines on the disc and a narrow yellow border on the transverse suture; behind the suture

the thorax is shining black; pleure black, with whitish reflections; scutellum yellowish-rufous. Legs

rufous, the cox with white reflections, the tibia brown towards the tip; hind tibiz on the distal two-

thirds with a long black fringe; foot-claws and pulvilli slightly elongate, yellow, the claws with black

tips. Tegule yellowish, brown at the base; halteres brown. Wings with the black coloration not

filling the whole apical and discal cells and at the end of the costa showing a tendency to become yellow ;

small cross-vein a little beyond the middle of the discal cell ; apical cross-vein nearly straight ; posterior

cross-vein slightly curved.

Hab. Mexico!, Xucumanatlan and Omilteme in Guerrero (H. H. Smith).

Two males. ‘This species much resembles 7. alipes, except that the abdomen is

rufous, instead of black, and the rufous colour of the legs is more extended.

7. Trichopoda nigripes.

Trichopoda nigripes, v. d. Wulp, Tijdschr. voor Ent. xxx. p. 184°.

Black ; face and lateral borders of the front greyish-white; thorax anteriorly with yellow tomentum and

black stripes; abdomen rufous, with black tips; wings black or dark brown, with the hind-border

subhyaline.

Length 6 millim.

Front of the female a little broader than that of the male; frontal band velvety-black, emitting on both sides

a shining black line, which extends to behind the vibrisse. Antenne piceous, the inner side of the third

joint reddish. Palpi rufous, very small and thin, clavate towards the tip. The yellow tomentum on the

thoracic dorsum forms a transverse stripe before the suture and a humeral spot, the stripe emitting three

lines; the surface behind the suture is entirely black, as is also the scutellum and metanotum. Abdomen

elliptical ; the black colour of the apex is not sharply defined anteriorly. Legs black, in some specimens

piceous, and in these the base of the hind femora is reddish ; the black fringe of the hind tibie is placed

on their apical half and is about as long as the breadth of the tibie. Tegule and halteres yellowish.

Wings with the dark coloration sometimes of a reddish-brown tint, or even with traces of a yellow stripe

(as in 7’. pennipes), the dark portion well defined, extending inferiorly beyond the fifth vein and reaching

the posterior transverse veins.

DIPTERA. 437

Hab. Mexico1, Xucumanatlan and Omilteme in Guerrero (H. H. Smith), Mexico

city (Schumann), N. Yucatan (Gaumer).

Several specimens of both sexes. In the collection of Prof. Bellardi, in Turin, I

have seen female specimens from Orizaba, Mexico, which are of a larger size (length

$°9 millim.).

8. Trichopoda pilipes.

Thereva pilipes, Fabr. Syst. Antl. p. 220°.

Trichopoda pilipes, Wiedem. Aussereur. zweifl. Ins. ii. p. 2727; Perty, Del. Anim. Art. Bras. p. 186,

t. 87. fig. 5°.

Length 6°5-10 millim.

Front narrower than the eyes; frontal band velvety-black; face, cheeks, and lateral borders of the front

silvery-white ; the frontal band emits on both sides a shining black stripe, which descends to beneath the

vibrisse, the basal part of the stripe being broad and the rest linear. Antenne black; the basal joints

short ; third joint in the male elliptical, three times as long as the second, in the female oval, twice as

long as the second. Palpi rufous, infuscate towards the tip. Thorax deep black; thoracic dorsum before

the transverse suture golden-yellow, with three black bands in the form of quadrangular spots; in some

specimens the median band is divided into two portions, and in that case the bands appear as four black

stripes; pleuree with white reflections; scutellum black. Abdomen rufous, the last two segments black;

the black colour on the dorsal side extending up to the hind-border of the second segment. Legs black °

base of the femora rufous ; foot-claws yellow, with black tips; pulvilli whitish. Tegule yellow, whitish

at the base. Wings black, with the hind-border and the tip greyish-hyaline ; the black colour ends at

or a little before the apical and posterior cross-veins.

Hab. Mexico, Acapulco, Rincon, Chilpancingo, Amula, and Xucumanatlan in

Guerrero, Cuernavaca in Morelos, Atoyac in Vera Cruz (H. H. Smith), Santiago

Ixcuintla in Jalisco (Schumann).—Sovutu America !-8,

Several specimens of both sexes. I have no doubt that they belong to 7. pilipes

(Fabr.), Wiedem., of which the descriptions are fully applicable; the South-American

insect, however, is described by Wiedemann as having the apex of the scutellum

ochraceous, whereas it is black in the Mexican specimens.

[N.B.—Mr. Townsend [Ann. & Mag. Nat. Hist. (6) xix. p. 29, and xx. pp. 272-283

(1897)]| has described several new species and varieties of this genus, as well as adding

various known forms, from the Rio Nautla, Vera Cruz.—Eb. |

HOMOGENIA * (to follow the genus Trichopoda, p. 3).

Homogenia, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 184 (1892).

In this genus I include all the species of Zrichopoda which have the apical cell of

the wings open. In addition to this character, the black fringe on the outer side of the

hind tibiz is shorter and less conspicuous, more in the form of a row of closely-placed

* guoyerijs (relation).

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1903. 37

438 SUPPLEMENT.

hairs or bristles, sometimes (H. rujfipes) with a longer bristle in the middle. The wings

have the black colour less extended and not sharply separated from the hyaline hind-

border ; or they are broad and have a yellow coloration, interrupted by brownish spots

or shadows (in the species thus coloured the front is, even in the male sex, distinctly

. broader than the eyes).

The name Trichopododes has been proposed for this genus by Mr. Townsend (Canad.

Ent. 1893, p. 166), on account of Homogenia being too much like Homogenes, Thoms.

(a genus of Coleoptera) ; but this change is, in my opinion, quite unnecessary.

The three species known to me may be distinguished as follows :—

1. Wings shaped as usual in Trichopoda, uniform brown along the

costa. 2 ew ww we ee ee ee ee we ww Ufipes, Vv. A. Walp.

Wings very broad, yellow in the basal and costal regions, brown at

the tip and along the veins. . . 2. 1. 1 1 ew ee ee

2. Scutellum yellow . . 2. 2... 1 we ee ee ee lettipennis, v. d. Wulp.

Scutellum black... 1. 1 ww 1 we ee ee ee) migroscutellata, v. d. Wulp.

1. Homogenia rufipes, \Aw

Homogenia rufipes, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 184".

Reddish-yellow ; frontal band, four stripes on the thorax, metanotum, a dorsal stripe and the last segment of

the abdomen, and the fringe of the hind tibie, black; third antennal joint, apical parts of the femora and

tibize, and the whole tarsi, dark brown; wings brown on the costal half.

Length 8 millim.

Head yellow ; front as broad as the diameter of the eyes; frontal band velvety-black, a black line descending

from it to the vibrissee on both sides of the cheeks; basal joints of the antenne rufous, the third joint

dark brown. Thorax with a golden-yellow tomentum and four rather broad black dorsal stripes, which

are interrupted at the transverse suture; scutellum dark brown, rufous at the hind margin. Abdomen

somewhat convex, elongate, narrower towards the tip, reddish-yellow, with a brown dorsal stripe, the

last segments black. Legs rufous; the apical half of the femora and tibiee brown; the fringe of the

hind tibie black and notably shorter than the breadth of the tibie; tarsi blackish-brown ; foot-claws

and pulvilli elongate, yellowish, the claws with black tips. Tegule and halteres yellow. Wings with

the brown coloration limited on its proximal portion by the fourth vein and beyond the small cross-vein

by the third vein, becoming less distinct near the tip, the remaining portion dilute brownish; the apical

cell rather broadly opened.

Hab. Mexico !, Acaguizotla and Chilpancingo in Guerrero (H. H. Smith), N. Yucatan

(Gaumer).

Two males and one female.

2. Homogenia latipennis, (Tab. XIII. figg. 8, ¢; 8a, head.)

Homogenia latipennis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 184’.

Yellowish-rufous ; frontal band, four stripes on the thorax, third antennal joint, a dorsal stripe on the

abdomen, the tips of the femora and tibiz, the fringe of the hind tibia, and the tarsi, black ; wings broad,

brownish, their base and costa yellow. .

Length 11 millim. .

Front broader than the eyes ; face and cheeks bright golden-yellow; sides of the front rufous; frontal band

DIPTERA. 439

velvety blackish-brown, emitting on both sides a black line, which descends to beneath the vibrisse.

Basal joints of the antenne rufous; third joint black. Proboscis black; palpi rufous. Thorax clothed

with a golden-yellow tomentum, with four black dorsal stripes, which are interrupted at the transverse

suture ; the two median stripes sometimes united and then appearing in the form of a broad black band ;

the outer stripes more prolonged behind the suture; scutellum ochraceous. Abdomen yellowish-rufous,

with a blackish dorsal stripe; the first two segments and a narrow lateral border to the following segments

showing whitish reflections. The black fringe of the hind tibie is short; the foot-claws and pulvilli are

yellowish, elongate in the male, the claws black at the tip. Tegule and halteres yellow. Wings broad,

greyish-brown with dark shadows along the veins; the base and the costa to beyond the end of the first

vein are yellow ; the apical cell is distinctly opened.

Hab. Muxtco!, Acaguizotla in Guerrero, Atoyac in Vera Cruz (H. H. Smith),

Santiago Ixcuintla in Jalisco (Schumann).

Three males.

3. Homogenia nigroscutellata.

Homogenia nigroscutellata, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 184°.

Similar to H. latipewnis, and perhaps only a variety of it, differing in its smaller size and in having the

scutellum blackish (instead of ochraceous).

Hab. Mexico !, Acaguizotla and Chilpancingo in Guerrero (H. H. Smith).

Two males measuring respectively 7 and 9 millim. in length. In one of them (the

largest) the black dorsal stripe on the abdomen is so broad that the yellow colour is

limited to the lateral borders; in the other specimen the dorsal stripe is narrow and

does not reach the end of the abdomen, and the whole surface of the latter has whitish

reflections.

ACAULONA (p. 4).

Acaulona costata (p. 4).

To the localities given, add :— Mexico, Atoyac in Vera Cruz, Teapa and Frontera in

Tabasco (H. H. Smith), N. Yucatan (Gaumer).

Amongst the additional specimens received are several larger females (length

5-7°5 millim.) agreeing with the description of the male. The black markings of the

abdomen, however, differ in some respects and seem to be rather variable: in several

examples there is a continuous black dorsal band and the last two segments are

wholly of that colour; in others the band is reduced to a row of triangular dorsal

spots and the last segments are but little infuscated. [Recorded by Mr. Townsend

(Ann. & Mag. Nat. Hist. (6) xix. p. 28) from Paso de Telaya and San Rafael, on the

Rio Nautla, Vera Cruz. |

322

440 SUPPLEMENT.

HYALOMYIA (to follow the genus Acaulona, p. 4).

Hyalomyia, Rob.-Desvoidy, Essai sur les Myodaires, p. 298 (1830).

The species of this well-defined genus are often difficult to determine, because their

bodies, usually of a shining black or somewhat metallic ground-colour, are sometimes

covered (in the best-preserved specimens) by a greyish or yellowish tomentum, which,

however, is easily abraded. As to the distinction of the sexes, it must be observed

that, contrasted with nearly all other Muscide, in Hyalomyia the front of the males

is broader than that of the females, where it is trigonal with the eyes coalescent or

closely approximate on the vertex. In the Central-American species this difference is

still more striking than in the European forms. The foot-claws and pulvilli are of

the same length in both sexes, or sometimes more elongate in the males. In the

females the last abdominal segment is convex, bent downwards and ending in a curved

spine.

I give here a Synoptic Table of the Mexican Hyalomyie known to me, though

I am unable to indicate with any certainty the two sexes of the same species :—

. Front with parallel or nearly parallel sides, as broad as or broader

than the eyes (males). Yer Ddyeys yt, 2.

__ Front trigonal (females) . . oe ee se ee 6.

/ 2. Wings yellowish, the veins, except those near the tip, yellow 3.

Wings hyaline or partly infuscated with black veins . A

8. Thorax yellowish-grey, with black lines; wings not infuseated at

the tip. . . sone - « munda, v.d. Wulp.

Thorax cinereous, with black stripes ; wings infuscated at ‘the tip . villosa, v. d. Wulp.

4. Thorax and scutellum yellowish-grey . . . . . . . . . « hebes, v.d. Wulp.

Thorax and scutellum blackish . . . . . . . .. OS

5. Front ochraceous . . . soe ee wwe ww we. «OChriceps, v. d. Wulp.

Front white, with black reflections . » . « , argenticeps, v. d. Wulp.

6. Wings hyaline, at most slightly infuscated at the base. yo |

Wings obscure or with infuscated portions . . . oe ew e 8

7. Front narrowed behind in such a manner that the eyes are nearly

coalescent. . . . ee - « nigrens, v. d. Wulp.

Front, though very much narrowed behind, distinctly separating

the eyes. . . . . - + + « piceipes, v.d. Wulp.

8. Small cross-vein on the middle of the discal cell (wings uniform

brown). . . . . . - + + + « merens, v. d. Wulp.

Small cross-vein beyond the middle of the discal ‘cell rs?

9. All the veins broadly bordered with brown ... . . umbrosa, v. d. Wulp.

The brown coloration of the wings more confined, usually forming

a dilute brownish spot on the mediastinal cell and on the small

cross-veln . 6 ee 6 ee ee ee we ww ww ee mbrifera, y. d. Wulp.

DIPTERA. 44]

1. Hyalomyia munda, (Tab. XIII. figg. 9, ¢; 9a, head.)

Hyalomyia munda, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 185°.

Yellowish-grey ; frontal band, stripes on the thorax, antenney, and legs black; wings yellowish, the costa

somewhat infuscated, the veins yellow.

Length 5-25 millim.

Head whitish ; front yellowish, broader than the eyes; immediately above the antenne a semilunular black

spot, emitting upwards a narrow black frontal band, which on the vertex is a little enlarged; oral

margin slightly projecting. Antenne black, the third joint three times as long as the second. Thorax,

scutellum, and abdomen thickly covered with a yellowish-grey tomentum; thoracic dorsum with four

black stripes, which are interrupted at the transverse suture; the two median stripes anteriorly con-

vergent. Abdomen laterally and posteriorly fringed with short pale yellow hairs. Legs shining black ;

foot-claws and pulvilli elongate, the pulvilli yellowish. Tegule and wings yellowish, the latter with the

base and costa a little infuscated, and the veins yellow, except those near the tip, which are obscure ;

small cross-vein before the end of the first vein and beyond the middle of the discal cell ; posterior cross-

vein in the middle between the small cross-vein and the curvature of the fourth vein; this curvature

arcuated and the apical cell long-petiolated.

Hab. Mexico!, Atoyac in Vera Cruz and Rincon in Guerrero (H. IT. Smith).

Three males.

2. Hyalomyia villosa.

Hyalomyia villosa, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 185".

~ Cinereous ; antenne, four stripes on the thorax, and abdomen black ; legs piceous; sides of the abdomen and

underside of the posterior femora densely haired; wings yellowish, slightly infuscated towards the tip.

Length 7 millim.

Head whitish ; front broader than the diameter of the eyes, in the middle with a broad blackish reflection ;

beard white. Antenne wholly black; proboscis and palpi brown. Thorax cincreous, with four black

stripes, the median ones a little converging anteriorly ; scutellum blackish. Abdomen shining black,

laterally and round the anus densely beset with yellowish hairs. Legs piceous, the knees and the

posterior tibiee somewhat testaceous ; underside of the posterior femora with a long and dense yellowish

pile; hind tibiz outwardly with four or five rather long bristles, and on the inner side fringed with short

black hairs ; foot-claws and pulvilli elongate, yellow, the claws black at the tip. Tegule and wings

yellowish ; the latter with the veins yellow, except those towards the tip, which are fuscous, and the

base and the apical portion slightly infuscated ; small cross-vein beyond the middle of the discal cell ;

posterior cross-vein perpendicular, a little concave and inserted before the middle between the small

cross-vein and the arcuated curvature of the fourth vein ; apical cross-vein long-petiolated.

Hab. Mexico}, Orizaba (coll. Bellardi).

A single male of this species is contained in the collection of the late Professor

Bellardi, in ‘Turin.

8. Hyalomyia hebes.

Hyalomyia hebes, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 183°.

Yellowish-grey ; antenne, frontal band, stripes on the thorax, abdomen, and legs black; wings greyish, the

base, costa, and apex infuscated, the veins blackish.

Length 5 millim.

Front broader than the eyes, yellowish-grey ; frontal band black, narrow, slightly enlarged towards the

vertex, sometimes disappearing in a grey reflection; face and cheeks whitish; beard white. Antenne

black, the tip of the second joint somewhat rufous. Proboscis black; palpi brown. Thoracic dorsum

449 SUPPLEMENT.

with four black stripes, which are interrupted at the transverse: suture ; the outer stripes anteriorly

truncated and at their posterior end united with a black transverse fascia on the hind margin of the

thorax. Scutellum yellowish-grey. Abdomen shining black, the sides, the hind margins of the last

segments, and round the anus densely clothed with short yellowish hairs. Legs shining black ; foot-

claws yellow, with black tips; pulvilli yellowish. Tegula pale yellow, large, the upper scale much

smaller than the under scale and brownish on its basal half. Wings greyish-hyaline, with dark-coloured

veins ; the base fuscous up to the humeral cross-vein and the end of the inferior basal cells; the surface

between the first and second veins and at the apex slightly infuscated ; neuration as in H. munda.

Hab. Mrxico!, Atoyac in Vera Cruz and Teapa in Tabasco (H. H. Smith).

Two males.

4, Hyalomyia ochriceps.

Hyalomyia ochriceps, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 185".

Black ; abdomen with metallic reflections ; front ochraceous; wings hyaline, infuscated at the base.

Length 5 millim.

Front scarcely as broad as the eyes, obscure ochraceous; frontal band black; face whitish, nearly perpen-

dicular, the oral margin very slightly prominent ; beard whitish. Basal joints of the antenne obscure

rufous; third joint black, twice as long as the second. Proboscis and palpi black. Thorax and

scutellum black; thoracic dorsum anteriorly with traces of darker stripes. Abdomen very shining,

metallic black, laterally and posteriorly fringed with white hairs, the hind margin of the last segments

with grey tomentum. Legs shining black; the underside of the front femora piceous ; foot-claws and

pulvilli not longer than the terminal tarsal joint; the pulvilli yellowish. Wings hyaline, their base

and the alula brown, the costal cell beyond the first vein greyish ; small cross-vein beyond the middle

of the discal cell; posterior cross-vein in the middle between the small cross-vein and the arcuate

curvature of the fourth vein.

Hab. Mexico, Rincon in Guerrero (H. H. Smith).

A single male specimen. [According to Mr. Townsend (Canad. Ent. 1893, p. 166),

H. ochriceps and H. argenticeps seem to be closely allied to H. e@netventris, Will.]

5. Hyalomyia argenticeps.

Hyalomyia argenticeps, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 185 *.

Thorax grey, with black stripes; abdomen black; head white, the front with black reflections : Wings

greyish, slightly infuscated at the base and along the costa.

Length 6 millim.

Head silvery-white ; front as broad as the eyes, with black reflections, sometimes appearing velvety-black

with a narrow white margin next the eyes; oral margin, in profile, somewhat conically projecting.

Antenne, proboscis, and palpi black; third antennal joint three times as long as the second. Thorax

grey, with four distinct equidistant black stripes, which are not interrupted at the transverse suture ;

scutellum black. Abdomen shining black, with metallic-violet reflections, laterally and posteriorly with

white hairs. Legs shining black ; foot-claws and pulvilli yellow, a little longer than the terminal tarsal

joints, the claws with black points. Tegule greyish-white. Wings greyish-hyaline, their base, the

costa beyond the first vein, and the subcostal cell somewhat infuscated ; small cross-vein under the

middle of the mediastinal cell and beyond the middle of the discal cell; posterior cross-vein distinctly

before the middle between the small cross-vein and the arcuate curvature of the fourth vein.

Hab. Mexico !, Xucumanatlan in Guerrero (H. H. Smith).

A single male specimen.

DIPTERA. — 443

6. Hyalomyia nigrens.

Hyalomyia nigrens, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 185 1.

Cinereous ; thoracic stripes, first abdominal segment, antenne, and legs black ; wings greyish.

Length 5 millim.

Head greyish-white ; front trigonal, narrowed behind in such a manner that the eyes are nearly coalescent ;

face distinctly projecting towards the oral margin Antenne black; third joint one and a half times as

long as the second. Proboscis black; palpi rufous, slightly thickened at the tip. Thorax qinereous;

some broad black stripes are more or less distinct before the transverse suture, but disappear in the

general black colour behind it; scutellum black. Abdomen black, and beset with short black hairs;

the last three segments cinereous, with a black dorsal stripe, the hind margins also blackish. Legs

black, the femora with faint metallic-blue reflections ; foot-claws and pulvilli short, the pulvilli brownish.

Tegule yellowish-white ; halteres yellow. Wings greyish-hyaline ; small cross-vein before the end of

the first vein and beyond the middle of the discal cell; posterior cross-vein in the middle between the

small cross-vein and the arcuate curvature of the fourth vein.

Hab. Mexico 1, Omilteme, Xucumanatlan, and Amula in Guerrero (H. H. Smith).

Six females. These specimens may belong to H. punctigera, Towns. (Proc. Ent.

Soc. Wash. ii. p. 135), from Virginia, which has the epistoma unusually prominent,

the palpi much enlarged at the tip, and the femora rather stout. H. punctigera, 3,

differs from all the Mexican Hyalomyie of which the males are known in having

the front triangular and the eyes rather closely approximated towards the vertex.

[Mr. Townsend (Canad. Ent. 1893, p. 166) states that the two species apparently

differ very little. |

7. Hyalomyia piceipes.

Hyalomyia piceipes, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 186°.

Black ; thorax cinereous, with four-black stripes; face and cheeks silvery-white ; wings hyaline.

Length 6°5 millim.

This species is very like H. nigrens, but it is somewhat larger; the eyes are a little more separated on the

vertex, and the face is not at all prominent towards tbe oral margin. Face and cheeks white, with

silvery reflections ; front and antenne black, the third antennal joint one and a half times as long as the

* second ; proboscis black ; palpi rufous, slightly enlarged at the tip. Thorax obscure cinereous; thoracic

dorsum with four equally broad black stripes, the interspaces on the front side whitish; scutellum black.

Abdomen shining bluish-black, without cinereous tomentum on the last segments, laterally with white

hairs. Legs black, the femora and tibie brownish; on the front pair the coxze with white hairs, the

femora on the upperside with black, outward and beneath with white hairs ; foot-claws black, pulvilli

brownish-yellow, scarcely longer than the last tarsal joint. Tegule greyish, with a white margin,

Wings hyaline, without greyish tint; venation as in H. nigrens, except that the posterior cross-vein is a

little before the middle between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico 1, Omilteme in Guerrero 8000 feet (H. H. Smith).

Two specimens. ? ‘ Key j

8. Hyalomyia merens.

Hyalomyia merens, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 186°.

Black; abdomen shining violet ; wings brown.

Length 4 millim.

444 SUPPLEMENT.

Front black, triangular, scarcely separating the eyes on the vertex; face and cheeks whitish, the face

distinctly prominent towards the oral margin; beard white. Antenne black; second and third joints

of nearly equal length ; palpi very small, rufous, the tip obscure. Thorax and scutellum black ; thoracic

dorsum before the transverse suture greyish, with indistinct black stripes. Abdomen shining metallic-

violet ; in one of the specimens with a sparse cinereous tomentum, which does not hide the ground-

colour, in the other this tomentum is entirely absent on the first segments’; the last segments are curved

towards the venter; laterally, the abdomen is beset with black hairs. Legs black; foot-claws and

pulvilli short, the pulvilli yellowish. Tegule brownish-grey. Wings unicolorous brown; small cross-

vein under the middle of the mediastinal cell and nearly on the middle of the discal cell; posterior

cross-vein in the middle between the small cross-vein and the arcuate curvature of the fourth vein.

Hab. Mexico!, Omilteme in Guerrero 8000 feet (H. H. Smith).

Two specimens. [According to Mr. Townsend (Canad. Ent. 1893, p. 166), this

species must be very near H. purpurascens, Towns.; the wings, however, of the latter

are not brown, but whitish. This difference sufficiently indicates that the two species

are distinct. |

9. Hyalomyia umbrosa. (Tab. XIII. figg. 10, ¢; 10a, head.)

Hyalomyia umbrosa, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 186°.

Black ; head whitish ; abdomen shining violet ; veins of the wings bordered with brown.

Length 6 millim.

Front trigonal, scarcely separating the eyes on the vertex; face nearly perpendicular, slightly prominent

towards the oral margin; face, cheeks, and sides of the front whitish ; immediately above the root of the

antennz a small, semilunar, shining black spot; beard white. Antenne black; third joint one and a

half times as long as the second. Proboscis black; palpi small, rufous, the tip brownish and slightly

enlarged. Thorax black; shoulders and thoracic dorsum before the transverse suture greyish with black

stripes. Abdomen shining metallic-violet ; the last segment with traces of grey tomentum; the abdomen

beset with black hairs, especially at the sides. Legs black; foot-claws and pulvilli a little longer than

the terminal joint of the tarsi; the pulvilli yellowish. Tegule whitish-grey. Wings grey, the veins

broadly bordered with brown ; small cross-vein beyond the middle of the discal cell; posterior cross-vein

in the middle between the small cross-vein and the arcuate curvature of the fourth vein.

Hab. Mexico !, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single specimen.

10. Hyalomyia umbrifera.

Hyalomyia umbrifera, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 1861.

Black ; head whitish ; abdomen (except the first segment) cinereous ; wings partly brownish.

Length 5°5 millim,

In the shape and colouring of the head, antenne, palpi, and thorax agreeing with the preceding species

(H. umbrosa). Abdomen shining black, with faint metallic-violet reflections ; the second and following

segments with cinereous tomentum, leaving black hind-borders and a black dorsal stripe. Legs black ;

foot-claws and pulvilli somewhat elongate, the pulvilli blackish, clearer at the tip. Tegule whitish.

Wings greyish-hyaline ; the mediastinal cell brown and surrounded by a brownish tint, which is more or

less prolonged at the costa and covers the small cross-vein ; in some specimens the tip is also brownish ;

small cross-vein on the middle of the discal cell; posterior cross-vein in or a little beyond the middle

between the small cross-vein and the arcuate curvature of the fourth vein.

DIPTERA. A449

Hab. Mexico!, Xucumanatlan and Omilteme in Guerrero 7000 to 8000 feet (Hf, H.

Smith).

Ten specimens. [Mr. Townsend (Canat. Ent. 1893, p. 166) notes that this species

is allied to his H. punctigera.|

Notse.—Bigot has described (Bull. Soc. Ent. Fr. 1885, p. clxxiii) a Mexican fly

under the name of Dimorphomyta calliphorides. He refers it somewhat doubtfully to

the Phasine, but the real affinities of the genus are very uncertain.

GYMNOSOMINE (p. 4).

No species of this group was known to me from Central America when the early

part of this work was published, though the two North-American genera, Gymnosoma

and Cistogaster, were noticed on p. 4.

CISTOGASTER.

Cistogaster, Latreille, Régne Anim. v. p. 511 (1829).

Of this genus (which differs from Gymnosoma in having shorter antenne), the

collections subsequently received from Mexico contain several species, which may be

distinguished in the following manner :—

1, Antenne and frontal band rufous or testaceous . . . . . . . ruficornis, v.d. Wulp.

Antenne and frontal band black (in some species the antennz partly

black, partly rufous) . . 2. 1. 2. 1 ew ee we eee

2. Thorax black, the shoulders only grey . . . . . . . . « « melanosoma, v. d. Wulp.

Thorax grey with black markings or brownish-ochraceous. . . . 3.

8. Petiole of the apical cell very short . . . . . . . 2 1. 4

' Petiole of the apical cell of the usual length . . . ..... 5.

4, Abdomen grey, with black markings: smaller species (length

35 millim.) ...... . . - 5 2 6 6 « « subpetiolata, v. d. Wulp.

Abdomen yellowish-rufous, with brown ) markings larger species

(length 6millim.) . ... . - « propingua, v. d. Wulp.

5. Abdomen anteriorly black, posteriorly. grey with black markings. - griseonigra, v. d. Wulp.

Abdomen rufous, with more or less conspicuous dark markings . . 6.

6. The dark markings of the abdomen obsolete . . . . . «. . . ferruginosa, v. d. Wulp.

The dark markings of the abdomen distinct . . . 7.

7”, Abdomen with a black dorsal band: larger species (length 55 5 millim, ) hirticollis, v. d. Wulp.

Abdomen with regularly-arranged black spots: smaller species

(length 4 millim.) . 2 2. 2 6. ee ee ee ew ew we . wariegata, v. d. Wulp.

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1903. 3m

446 SUPPLEMENT.

1. Cistogaster ruficornis.

Cistogaster ruficornis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 186 -

Thorax anteriorly testaceous, with four brown stripes, posteriorly black; abdomen rufous, with black dorsal

spots; antenne rufous ; legs black.

Length 5:5 millim.

Face and cheeks pale yellow ; front ochraceous ; frontal band rather broad, testaceous; ocellar triangle black.

Antenne, including the arista, rufous; second joint somewhat elongate, with short bristles; third joint a

little longer than the second. Proboscis shining black; palpi rufous. Thorax before the transverse

suture testaceous, with four brown stripes, the shoulders bright ochraceous ; behind the suture the thorax

is black and bears a short black pile; scutellum black. Abdomen rufous, the base and three irregular

dorsal spots black. Legs black; foot-claws and pulvilli fuscous. Tegule yellow. Wings brownish-

grey, the base yellow; apical cross-vein oblique, straight ; posterior cross-vein a little curved; petiole of

the apical cell slightly bent upwards.

Hab. Mextco1, Teapa in Tabasco (H. H. Smith).

A single male specimen. A female from Puebla in the collection of the late

Prof. Bellardi, in Turin, seems to belong to this species ; it has the dorsal spots of the

abdomen more extended, forming on the first three segments a broad band, which is

somewhat dilated on each of them posteriorly, and the anal spot double. [According

to Mr. Townsend (Canad. Ent. 1893, p. 166), C. ruficornis is perhaps synonymous with

Gymnosoma filiola, Low. |

2. Cistogaster melanosoma.

Cistogaster melanosoma, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 186’.

Black; head whitish ; shoulders, pleure, and last abdominal segment grey.

Length 6 millim.

Front as broad as the eyes, narrowed towards the vertex; frontal band black; face, cheeks, and sides of the

front white, with grey reflections; oral margin prominent; beard white. Antenne black; third joint

one and a half times as long as the second. Proboscis and palpi black, the latter small, slightly thickened

at the tip. Thorax and scutellum black ; shoulders, pleure, and thoracic dorsum before the transverse

suture grey, the latter with traces of black stripes. Abdomen shining black ; anal segment grey, especially

at the sides and along a dorsal stripe. Legs black ; foot-claws and pulvilli short. Tegule white. Wings

greyish-hyaline ; small cross-vein before the middle of the discal cell; apical cross-vein straight ; posterior

cross-vein a little curved ; petiole of the apical cell slightly bent upwards.

Hab. Mexico!, Chilpancingo and Xucumanatlan in Guerrero (fH. H. Smith).

Two female specimens. [Mr. Townsend (Canad. Ent. 1893, p. 166; Ann. & Mag.

Nat. Hist. (6) xx. p. 284) thinks that this species is probably synonymous with

C. pallasi, Towns., from 8. Dakota. ]

3. Cistogaster subpetiolata.

Cistogaster subpetiolata, vy. d. Wulp, Tijdschr. voor Ent. xxxv. p. 186°.

Grey ; frontal band, stripes on the thorax, first and second abdominal segments and some spots on the following

segments, antenne, and legs black; apical cell closed nearly at the wing’s margin.

Length 3°5 millim.

Head white; front grey, of equal breadth over its whole length ; frontal band black, narrower than the sides,

DIPTERA. AAT

bifid before the vertical triangle; cheeks inferiorly with a brownish-yellow margin ; beard white; occiput

grey. Antenne black; third joint as long as the second, whitish at the base on the inner side, Proboscis

black; palpi brown. Thoracic dorsum with two broad blackish stripes, each of which (when viewed in

some directions) seems to be composed of three lines ; pleure whitish-grey; scutellum greyish-black. First

abdominal segment wholly black; second segment black, with a grey dorsal stripe and less distinct grey

lateral spots ; third segment grey, with two large black spots on the hind margin, the space between these

spots forming the continuation of the dorsal stripe on the preceding segment ; anal segment grey, with

two lateral black spots. Tegule white. Wings greyish ; apical and posterior cross-veins oblique and

nearly straight ; apical cell ending in the wing’s tip and with a very short petiole.

Hab. Mexico !, Atoyac in Vera Cruz (7. H. Smith).

A single female specimen. [Mr. Townsend states (Canad. Ent. 1893, p. 166) that

C. subpetiolata seems to be only a variety of his C. pallasi ; and subsequently (Ann. &

Mag. Nat. Hist. (6) xx. p. 284) that it is a small specimen of C. occidua, Walk. ]

4. Cistogaster propinqua.

Cistogaster propinqua, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 187°.

Thorax grey, with black stripes; abdomen yellowish-rufous, with brown markings; antenne partly black,

partly rufous ; legs black ; apical cell closed nearly at the wing’s margin,

Length 6 millim.

Front a little narrower than the eyes, yellowish-white ; frontal band black; face and cheeks whitish ; oral

margin slightly prominent ; occiput grey ; beard white. Basal joints of the antenne black ; third joint

nearly twice as long as the second, rufous, but on the fore side black. Proboscis black, the base brownish ;

palpi rufous, thickened towards the tip. Thorax greyish-cinereous, with some black stripes, the two

median stripes linear and distant from each other; scutellum obscure cinereous. Abdomen yellowish-

rufous ; in one of the specimens the first segment is brown, the two following segments have a brown

hind-border, which in the middle is interrupted, and the anal segment has two brown spots ; in the other

specimen these brown markings are less obscure, having a more rufous tint, and are totally wanting on

the anal segment. Legs black; foot-claws and pulvilli very short. Tegule white. Wings greyish-

hyaline, yellowish at the base and the beginning of the costa; small cross-vein on the middle of the discal

cell ; posterior cross-vein slightly curved ; curvature of the fourth vein with a somewhat rounded angle ;

petiole of the apical cell very short, inconspicuous.

Hab. Mexico}, Tepetlapa in Guerrero (£7. H. Smith).

Two females. [According to Mr. Townsend (Canad. Ent. 1893, p. 166), this species

seems very near C. tmmaculata, Macq. |

5. Cistogaster griseonigra.

_ Cistogaster griseonigra, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 187°.

Grey; frontal band, thoracic dorsum, the abdomen in part, antenns (except the rufous base of the third joint),

and legs black ; palpi rufous.

~ Length 4°5-6 millim.

Head whitish ; front narrower than the eyes ; face slightly prominent towards the oral margin; beard white.

Antenne black ; third joint one and a half times as long as the second, rufous at the base. Proboscis

black; palpi pale rufous, almost filiform. Thorax and scutellum greyish-cinereous; thoracic dorsum

black, before the transverse suture less obscure and with indistinct black stripes. Abdomen with the first

two segments shining black (in certain specimens the hind-border of the first is more or less rufous, this

colour sometimes extending on to the sides of the two following segments) ; third segment grey, with the

hind-border shining black, but in the middle interrupted by a grey dorsal stripe ; fourth segment grey,

3m 2

448 SUPPLEMENT.

with two subtrigonal spots, which, however, are sometimes obsolete or wanting. Legs black ; foot-claws

and pulvilli short. Tegule white. Wings greyish-hyaline, yellowish at the base ; small cross-vein before

the middle of the discal cell; apical and posterior cross-veins straight or nearly so ; petiole of the apical

cell of usual length.

Hab. Mexico}, Acaguizotla, Chilpancingo, and Amula in Guerrero (H. H. Smith).

Nine female specimens. [According to Mr. Townsend (Canad. Ent. 1893, p. 166),

this species “may be the same as C. occidua, Walk.”; he subsequently (Ann. &

Mag. Nat. Hist. (6) xx. p. 285) states that it is probably a variety of C. pallasi,

Towns. |

6. Cistogaster ferruginosa.

Cistogaster ferruginosa, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 187°.

Head, thorax, and scutellum ochraceous; abdomen rufous; antenne and legs black ; tegule and base of the

wings yellow.

Length 5-6°5 millim.

Front narrower than the eyes, ochraceous ; frontal band black ; face slightly prominent towards the oral margin,

pale ochraceous ; cheeks whitish ; occiput grey ; beard white. Antenne black; third joint a little longer

than the second, rufous at the base. Proboscis shining black; palpi pale rufous. Thoracic dorsum

brownish-yellow, with four brown stripes ; shoulders ochraceous ; pleure greyish ; scutellum brownish-

yellow. Abdomen rufous, usually with yellowish reflections on the second and following segments,

forming a dorsal stripe and lateral spots ; sometimes on each side of the dorsal stripe there are traces of

brown spots. Legs black; foot-claws and pulvilli somewhat elongate, the pulvilli fuscous. Tegule

yellow. Wings brownish-grey, their base yellow ; small cross-vein on or a little before the middle of the

discal cell ; apical and posterior cross-veins oblique, nearly straight; petiole of the apical cell slightly

bent upwards.

Hab. Mexico}, Dos Arroyos, Tierra Colorada, Chilpancingo, Amula, Xucumanatlan,

and Omilteme in Guerrero, Teapa in Tabasco (H. H. Smith).

Several specimens, all males. [According to Mr. Townsend (Canad. Ent. 1893,

p. 166), this insect is probably C. immaculata, Macq. ]

7. Cistogaster hirticollis.

Cistogaster hirticollis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 187’.

Head ochraceous ; thorax and scutellum brownish, densely pilose ; abdomen rufous, with a black dorsal stripe ;

antenne, frontal band, and legs black.

Length 6°5 millim. .

Front narrowed behind, ochraceous ; frontal band and vertex black ; face and cheeks ochraceous, with white

reflections, the face slightly prominent towards the oral margin; beard and pile of the occiput pale

yellow. Antenne black; third joint a little longer than the second. Proboscis black ; palpi rufous.

Thorax and scutellum brown ; thoracic dorsum with rather dense and long pile, which is partly yellow

and partly black ; before the transverse suture the ground-colour is somewhat ochraceous, and obsolete

black stripes are visible; shoulders and pleure yellowish-grey. Abdomen rufous; base of the first

segment black ; on the following segments a black dorsal stripe, which in most specimens is divided in

two parts by a line of ochraceous tomentum ; last segment with ochraceous reflections. Legs black ;

foot-claws and pulvilli elongate, the pulvilli yellowish-grey. Tegule yellow. Wings brownish-grey,

at the base and along the costa yellowish ; small cross-vein on the middle of the discal cell; apical cross-

vein straight ; posterior cross-vein a little curved ; petiole of the apical cell slightly bent upward.

DIPTERA. 449

Hab. Mexico! (coll. Bellardi), Xucumanatlan and Omilteme in Guerrero 7000 to

8000 feet (H. H. Smith).

Five males, one of which is in the collection of Prof. Bellardi, in Turin. [Mr.

Townsend remarks of this species (Canad. Ent. 1893, p. 166) “doubtless C. occidua,

Walk.” |

8. Cistogaster variegata *.

Cistogaster variegata, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 187’.

Head ochraceous; thorax and scutellum yellowish-grey, the thorax with dark stripes ; abdomen rufous, with

black markings ; antenne and legs black.

Length 4 millim.

Front much narrower than the eyes, ochraceous ; frontal band black; face and cheeks pale ochraceous, the

face slightly prominent towards the oral margin; occiput grey; beard white. Antenne black; third

joint a little longer than the second. Proboscis black; palpi pale rufous. Thoracic dorsum yellowish-

brown, with four dark stripes; shoulders and pleure grey; scutellum obscure cinereous. Abdomen

rufous, the sides greyish-white ; base of the first segment black ; on the second segment two black lines,

separated by a grey dorsal band, and laterally two black spots; hind margin of the third segment black,

in the middle interrupted by a grey dorsal band; fourth segment with two trigonal black spots. Legs

black ; foot-claws and pulvilli somewhat elongate, the pulvilli fuscous. Tegule yellowish-white. Wings

greyish-hyaline, slightly infuscated at the base; small cross-vein nearly on the middle of the discal cell;

apical cross-vein straight ; posterior cross-vein a little curved.

Hab. Mexico ', Chilpancingo in Guerrero (H. H. Smith).

A single male specimen. This and the two preceding species (C. ferruginosa and

C. hirticollis) agree in general aspect, and in coloration and markings—the ochraceous

head, the yellowish-brown thorax with dark stripes, and the rufous abdomen with more

or less distinct black pattern. In C. ferruginosa the markings on the abdomen are

obsolete ; in C. hirticollis they form a more conspicuous dorsal band ; and in C. varie-

gata (which is smaller than the others) the abdomen shows several regularly-arranged

black spots. Mr. Townsend (Canad. Ent. 1893, p. 166) remarks that C. variegata

‘‘seems to be only a variety of C. occidua, Walk.” |

OCYPTERING (p. 5).

OCYPTERA (p. 5).

In my first enumeration a single species only of this genus is mentioned from Mexico,

whence three others are now known. They may be separated in the following

manner :——

1. Abdomen partly rufous . . . . . . 2.

Abdomen wholly black . . 2. 1 ee ee ee ee eee

* (The type of this species has been destroyed by an Anthrenus.—Ep. ]

450 SUPPLEMENT.

2. Veins of the wings distinctly bordered with brown; tibie rufous . . signatipennis, v. d. W.

Veins not bordered with brown, the base and costa only of the wings

brownish ; legs wholly black. . . . . . . . . . « dosiades, Walk. (soror, Bigot).

8. Antenne entirely black: larger species (10 millim.) . . . . . . atra,v. Roder.

Antenne pale rufous at the base: smaller species (7 millim.) . . . minor, v. Roder.

1. Ocyptera dosiades.

Ocyptera dosiades, Walk. List Dipt. Brit. Mus. iv. p. 695°.

Ocyptera soror, Bigot, antea, p. 5° (nec Wiedem.).

To the localities given, add :—Nortu America, Nova Scotia 1.—Mexico, Rio Papagaio,

Chilpancingo, Amula, Xucumanatlan, and Omilteme in Guerrero, Atoyac in Vera Cruz

(Hf. H. Smith).

Several more specimens of this species, which I formerly referred to O. soror, Big.,

have been received from Mexico. These agree better with Walker’s description of

QO. dosiades, while the rufous coloration on the sides of the abdomen is. much more

extended. In several males the abdomen may be described as rufous, with the base,

an uninterrupted dorsal stripe, and the last two segments black.

2. Ocyptera signatipennis, (Tab. XIII. fig. 11, ¢.)

Ocyptera signatipennis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 187’.

Head whitish; thorax and scutellum blackish; abdomen rufous, with a black dorsal band and white incisions ;

antenne and legs black, the tibie dark rufous; wings brownish on the costa and with some of the veins

bordered with brown.

Length 11 millim.

Ground-colour of the head rufous, but modified by a silvery-white pubescence; frontal band broad, brownish-

black. Antenne black, second joint rufous at the tip; third joint one and a half times as long as the

second. Thorax and scutellum black; the shoulders and the anterior part of the thoracic dorsum

whitish-grey, the latter with two black lines. Abdomen rufous; the small first segment (indistinctly

separated from the second) black; second and third segments with a black dorsal band, interrupted at

the incision ; third and fourth segments with narrow white front-borders; anal segment and genital parts

(which are recurved towards the venter) shining rufous; second and third segments each with two

submarginal macrochete; fourth and anal segments with a row of similar macrochete. Legs black ;

front cox anteriorly greyish; tibis dark rufous; femora and tibise with several scattered bristles ;

foot-claws and pulvilli elongate, the pulvilli yellowish. Tegule white. Wings greyish-hyaline; the

base, the costal, subcostal, and basal cells brownish-yellow ; the third and fourth veins, and the exterior

cross-veins, bordered with brown; small cross-vein beyond the middle of the discal cell; apical and

posterior cross-veins oblique and curved ; petiole of the apical cell turned upward.

Hab. Mexico 1, Chilpancingo in Guerrero (A. H. Smith).

A single male specimen. [According to Mr. Townsend (Canad. Ent. 1893, p. 167),

O. signatipennis is probably O. euchenor, Will. |

3. Ocyptera atra.

Ocyptera atra, v. Réder, Berl. ent. Zeitschr. 1885, p. 344°.

Hab. Mexico, Temax in N. Yucatan (Gawmer).—ANTILLES, Puerto Rico}.

A single female specimen.

DIPTERA. 451

4. Ocyptera minor.

Ocyptera minor, v. Réder, Berl. ent. Zeitschr. 1885, p. 344".

Hab. Mexico, La Venta and Tierra Colorada in Guerrero (H. H. Smith) —ANTILLES,

- Puerto Rico !.

Two males and two females.

BESKIA (to follow the genus Ocyptera, p. 5).

Beskia, Brauer and v. Bergenstamm, Denkschr. Akad. Wiss. Wien, lvi. p. 139, t. 10. fig. 276 (1889).

This genus, which includes but a single species, is shortly but clearly characterized

by the authors. To their description may be added the following details :—

Head broader than the thorax, in profile nearly quadrangular ; eyes bare, breadly separated by the front and

descending to near the underside of the head; frontal bristles weak, two on the vertex longer and more

robust; face perpendicular, the oral margin scarcely prominent, the vibrisse inserted exactly on it;

antenn porrect; arista bare. Abdomen cylindrical; besides the four visible segments, there is still an

indistinct basal and a very small anal segment; at the hind margins of the segments are rather long

macrocheete ; two shorter macrocheti on the disc of the second and third segments. Wings as long as

the abdomen ; curvature of the fourth vein rounded.

1. Beskia cornuta. (Tab. XIII. figg. 12; 124, wing.)

Beskia cornuta, Brauer & v. Berg. Denkschr. Akad. Wiss. Wien, lvi. p. 170°.

Hab. Mexico, Tierra Colorada and Chilpancingo in Guerrero, Atoyac in Vera Cruz

(H. H. Smith).—Braztu '. |

Three specimens. In two of them the abdomen is wholly orange-yellow, thus

agreeing with the description!, but in the third it becomes brown towards the apex;

all have the foot-claws and pulvilli short, as in the Brazilian specimens described by

the Austrian authors, which were considered by them to be males, though with some

doubt. The front coxee have a white pubescence. The bristles of the tibiz are weak,

those of the hind pair somewhat longer. In the wings the small cross-vein is under

the end of the first vein and beyond the middle of the discal cell; the posterior cross-

vein is straight, perpendicular, and nearly in the middle between the small cross-vein

and the curvature of the fourth vein.

XANTHOMELANA * (to follow the genus Beskia).

Xanthomelana, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 188 (1892).

Head broader than the thorax; eyes bare, in both sexes broadly separated by the front (in one species the

front much narrowed behind in the ¢); front not prominent ; frontal bristles weak ; face perpendicular ;

oral margin somewhat porrect, at some distance above it a pair of vibrisse; cheeks narrow. Antenne

shorter than the face; third joint oval or elliptical; arista bare. Proboscis rather prominent; palpi

filiform, very small. Thorax nearly quadrangular. Abdomen cylindrical, seldom elongate-oval, composed

* EarOds (yellow); pédas (black).

452 SUPPLEMENT.

of five segments, which have macrochete on their hind margin. Legs moderately long, with some

bristles; foot-claws and pulvilli elongate in the ¢. Wings rounded at the tip, usually blackish along

the costa ; curvature of the fourth vein rounded ; apical cell closed and petiolated at the wing’s tip.

This genus differs principally from Ocyptera in the less elongate shape of the third

antennal joint and in the venation of the wings, the curvature of the fourth vein being

not angular but rounded, and the petiole of the apical cell not ending in the costa but

in the wing’s tip. Xanthomelana has a certain affinity to the genus Acaulona (antea,

p. 4), belonging to the Phasine. The apical cell of the wings, however, is closed and

petiolated, and macrochete are present on the abdomen, this last-mentioned character

bringing the present genus into the group Ocypterine.

Mr. Townsend [Canad. Ent. 1893, p. 167; Ann. & Mag. Nat. Hist. (6) xx. p. 287]

has suggested the name Xanthomelanodes for this genus, on account of Xanthomelana

being too much like Xanthomelon, v. Mart. (a genus of Mollusca), but there is no

necessity for this change.

The six species known to me may be identified by the following Table :—

1. Antenne elongate, the third joint more than twice as long as the

second; arista thickened to beyond the middle and distinctly jointed

atthe base. 6 1 ee ee ew ee ee ew we ee rticulata, v. d. Wulp.

Antenne short, the third joint not more than twice as long as the

second; arista thickened at the base only and not distinctly jointed . 2.

2. Legs rufous or yellowish, at least the coxe and the basal part of the

femora of that colour . 2. 1 1 6 we ee eee ee

Legs black . a 4,,

3. Femora wholly rufous; abdomen rufous, with the last two segments

black . . . . oe ee . oe rubicunda, v. d. Wulp.

Femora black towards the tip; abdomen rufous, with black dorsal

spots or a black dorsal band . woe ee ww ew we we +) «dorsalis, v. d. Wulp.

4, Abdomen with trigonal black markings. . . . . . . . =. . .« érigonalis, v. d. Wulp.

Abdomen with a black dorsal band, which is sometimes absent. . . 5.

. Tegulz and halteres yellow; abdomen cylindrical, with a black dorsal

band ; front broad in both sexes . . . 2. 1 1. we we ee gracilenta, v. d. Wulp.

Tegule and halteres black; abdomen ovate, without black band; eyes

nearly contiguousin 6 «1. ww we ee ee ee anceps, V. A. Walp.

1. Xanthomelana articulata. (Tab. XIII. fig. 18, head, ¢.)

Xanthomelana articulata, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 188".

Black ; head, shoulders, and the transverse suture of the thorax yellow; abdomen rufous, black towards the

_ tip; femora partly rufous ; wings blackish; antenne elongate ; arista thick, distinctly jointed.

Length 5 millim.

Front as broad as the diameter of the eyes; frontal band black, occupying almost the whole breadth of the

front; the sides, face, and cheeks yellow; occiput whitish-grey ; antenne black, third joint elliptical,

more than double as long as the second, the first joint of the arista and the proximal half of the second

thickened. Palpi rufous, infuscate towards the tip. The thorax has quadrangular yellow humeral spots ;

the yellow margin of the transverse suture is but a thin line, and there is a similar line on the hind

DIPTERA. 453

“margin before the scutellum; the pleuree have whitish reflections. Abdomen cylindrical, rufous, with a

yellowish front-border to the segments; the last two segments are blackish-brown and the preceding ones

show traces of brown dorsal spots; on the hind margin of each segment, except the first, are two dorsal

macrochetw. Legs black; the coxee with white reflections ; the base of the femora is rufous, this colour

on the hind pair extending over the proximal half; foot-claws and pulvilli elongate. Tegule yellowish ;

halteres rufous. The blackish coloration of the wings is faded towards the hind-border; small cross-vein

under the end of the first vein and beyond the middle of the discal cell; apical cell shortly petiolated ;

posterior cross-vein slightly curved, a little beyond the middle between the small cross-vein and the

curvature of the fourth vein.

Hab. Mexico !, Atoyac in Vera Cruz (H. H. Smith), Orizaba (coll. Bellard?).

A single male from each locality.

2. Xanthomelana rubicunda.

Xanthomelana rubicunda, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 188°.

Thorax black, with yellow and whitish markings; head white; abdomen and legs rufous; antenne, frontal

band, and scutellum black; wings blackish, darker at the base and along the costa.

Length 4°5 millim.

Front narrower than the diameter of the eyes; frontal band velvety-black, the sides yellow; face and cheeks

white. Antenne black; third joint double as long as the second; arista a little thickened on its proximal

half, not visibly jointed. Thorax black, a humeral spot and two points on the anterior margin pale

yellow; hind margin, metanotum, and pleure with whitish reflections; scutellum velvety-black.

Abdomen cylindrical, rufous; the last two segments, except the front margin, shining dark brown; two

dorsal macrochetz on the hind margin of each segment. Coxe and femora rufous, the anterior coxe

with white reflections; tibie brown, the hind pair with some scattered bristles on their onter edge ;

tarsi black ; foot-claws and pulvilli short. Tegule and halteres yellowish. Small cross-vein under the

end of the first vein and beyond the middle of the discal cell; posterior cross-vein straight, in the middle

between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico 1, Teapa in Tabasco (H. H. Smith).

A single specimen. On account of its narrow front and the shape of the anal

segment, I take it to be a male.

3. Xanthomelana dorsalis.

Xanthomelana dorsalis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 188°.

Thorax black, with yellow markings; abdomen yellow, with a black dorsal band; legs black, the coxa, and

base of the femora yellow ; anterior half of the wings black.

Length 7 millim.

Front as broad as the eyes, velvety-black, narrowly bordered with yellow at the sides; face and cheeks pale

yellow ; occiput grey. Antenne black; third joint nearly twice as long as the second. Proboscis black ;

palpi pale rufous. Thorax black; the shoulders, the pleure, and a narrow margin before the scutellum

yellow ; sometimes the black colour before the transverse suture is formed by four broad stripes ;

scutellum black. Abdomen cylindrical, yellow, with a black band, which is sometimes interrupted at

the sutures of the segments, and then forms a row of dorsal spots ; on the last segments the black colour

is usually more extended, especially in the female; fifth segment in the male slightly prolonged

inferiorly into a small nipple; male-genitalia but little developed ; some short macrochetze at the hind

margin of the segments. Legs black ; coxe and base of the femora yellowish-rufous, the coxe on the

front side with white reflections; middle and hind tibice with some rather long bristles ; foot-claws and

pulvilli elongate in the male, the pulvilli yellowish. Tegule yellow. Wings grey, the base and costa

BIOL. CENTR.-AMER., Dipt., Vol. IT., May 1903. 3 9

454 SUPPLEMENT.

black, the black colour reaching the fourth vein and becoming more dilute in the apical cell; small eross-

vein beyond the middle of the discal cell; petiole of the apical cell rather long; posterior cross-vein

convex, in the middle between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico1, Rio Papagaio, Xucumanatlan, and Omilteme in Guerrero (H. H.

Smith), Atoyac in Vera Cruz (Schumann).

Several specimens of both sexes. The females previously referred by me! to

X. gracilenta really belong here.

4, Xanthomelana trigonalis.

Xanthomelana trigonalis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 188°.

Yellow; frontal band, three stripes on the thorax, trigonal dorsal spots on the abdomen, antenne, and legs

black ; wings blackish along the costa.

Length 7:5 millim.

Head white; front as broad as the eyes; frontal band broad, black; antenne black, the third joint nearly

twice as long as the second ; proboscis black; palpi pale rufous. Thoracic dorsum pale yellow, with three

broad black stripes, which are slightly interrupted at the transverse suture; pleure grey, with blackish

reflections; scutellum black. Abdomen yellow, the base and the trigonal dorsal spots black, these spots

being extended laterally to the narrow hind margins of the segments; macrochete short. Legs black,

the coxe grey on the front side; tibize with some bristles ; foot-claws and pulvilli elongate, the pulvilli

greyish. Tegule whitish. Wings grey, blackish along the costa; apical cell pointed and very shortly

petiolated; small cross-vein beyond the middle of the discal cell; apical cross-vein slightly concave ;.

posterior cross-vein somewhat curved.

Hab. Mexico1, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

A single male specimen.

5. Xanthomelana gracilenta. (Tab. XIII. fige. 14, ¢; 14a, wing.)

Aanthomelana gracilenta, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 189 (¢ nec ?)'.

Thorax black, with yellow or whitish markings; head yellow or white; frontal band, antenne, and legs black ;

abdomen yellow, with a dorsal band and the last segment black ; tegule and halteres pale yellow ; costal

half of the wings blackish.

Length 4°5 millim.

Front a little narrower than the diameter of the eyes; frontal band velvety-black ; sides of the front, face, and

cheeks bright yellow ; occiput greyish. Antenne black; third joint oval, one and a half times as long

as the second; arista a little thickened at the base, tapering towards the end; palpi rufous. Thorax

black, before the transverse suture with a bright yellow tomentum, which is interrupted by four broad

black stripes; behind the suture the yellow tomentum extends along the sides and borders the posterior

margin of the thorax, surrounding thus a large black dorsal spot; on the pleure are some irregular grey

spots and an oblique band of the same colour. Abdomen cylindrical; the yellow parts somewhat trans-

parent ; the first segment black on the dorsal side, the second and third with a broad dorsal band, which

is sometimes interrupted at the incisures, the last segment black; in the female the black colour is

extended in such a- manner that there is only on each side a large yellow spot; on the hind margins of

the segments are two dorsal and some lateral macrochete. The hind tibie have some bristles on their

outer edge; foot-claws and pulvilli elongate, the pulvilli fuseous. The blackish coloration on the costal

portion of the wings is not sharply limited, and the rest of the surface is grey; the venation is nearly

the same as that of X. articulata.

Hab. Mexico!, Rincon in Guerrero (1. H. Smith).

DIPTERA. 455

Two males. In the diagnosis previously given by me! I mentioned also the female ;

the specimens of this sex, however, which I formerly referred to X. gracizenta do not

differ from those of X. dorsalis, as they have the coxe and femora rufous.

6. Xanthomelana anceps. (Tab. XIII. fig. 15, ¢.)

Xanthomelana anceps, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 188'.

Deep black, including the antennae, legs, tegule, and halteres, the abdomen only yellowish-red ; wings

blackish.

Length 5 millim.

This species differs from the others in the almost contiguous eyes and in the shape of the abdomen, which is

. not cylindrical, but ovate and convex. The face and cheeks are dark grey; the front is black and

triangular; the antenne and palpi are likewise black ; the third antennal joint is but little longer than

the second ; the arista thickened at the base. The abdomen is somewhat infuscate towards the anus; the

macrochetz on the hind margin of the segments are longer and laterally more numerous. The posterior

tibie have some bristles on their outer edge ; the foot-claws and pulvilli are elongate, the pulvilli blackish.

The black coloration of the wings is obsolete towards the hind margin and the tip ; the apical cell is rather

long-petiolated ; small cross-vein under the middle of the mediastinal cell and beyond the middle of the

costal cell; posterior cross-vein straight, nearer to the small cross-vein than to the curvature of the

fourth vein.

Hab. Mexico 1, Atoyac, Vera Cruz (H. H. Smith).

Three male specimens.

[N.B.—Xanthomelanodes arcuata (Say) has been recorded by Mr. ‘Townsend [Ann.

& Mag. Nat. Hist. (6) xx. p. 285 (1897)] from Paso de Telaya, Vera Cruz.—Ep.]

The following species have been referred by Bigot to the group Ocypterine :—

Scopolia (=Phoricheta, Rond.) satanica, Bigot, Ann. Soc. Ent. Fr. 1888, p. 254.—

Mexico.

Stevenia pallidiventris, Bigot, 1. c. p. 255.—Mexico.

Jiavocalyptrata, Bigot, 1. c. p. 255.—Mexico.

Scopolia satanica, Bigot, belongs to the genus Penthosia, of the group Phanine

(vide infra). As to the species of Stevenia, they seem to have many affinities

with Xanthomelana; but I must remark that in this latter the arista is bare,

whilst in Stevenia, Rob.-Desyv., it is distinctly plumose.

PHANIN& (p. 5).

Since my remarks on this group were published, I find that the genus Ancylogaster,

Bigot (1884), including a single species from Mexico, belongs to it, and two other

genera, Clinogaster and Penthosia, have since been added by myself.

456 SUPPLEMENT.

ANCYLOGASTER.

Ancylogaster, Bigot, Bull. Soc. Ent. Fr. 1884, p. lxix.

Head slightly broader than the thorax, seen from in front somewhat higher than broad ; front as broad as the

transverse diameter of the eyes, with erect hairs (no bristles), which diminish in length towards the vertex

and descend to a little beneath the root of the antenne; face nearly perpendicular; oral margin not

prominent, without vibrisse ; cheeks narrow. Eyes bare, reaching to the underside of the head, slightly

excavated behind. Antenne obliquely exserted, rather long and slender; basal joints short; third joint

five times as long as the second; arista bare. Proboscis and palpi small, the palpi slightly thickened

towards the tip. Thorax nearly as long as broad, at the sides and behind with some bristles; scutellum

with four bristles, two lateral and two posterior, the latter crossed. Abdomen cylindrical, composed of

six segments, the last segments curved towards the venter ; genitalia well-developed ; macrochetz few in

number, very short, and only at the hind margins of the segments. Legs moderately long; tibiz rather

broad, attenuated towards the base and bearing some short bristles ; tarsi shorter than the tibia. Tegule

large, rounded. Wings narrow at the base, rounded at the apex; curvature of the fourth vein angular ;

apical cell narrowly opened a little in front of the wing’s tip; posterior cross-vein inserted much nearer

to the curvature of the fourth vein than to the small cross-vein.

On account of the curved abdomen, this genus must apparently be included in the

group Phanine, from all the existing genera of which it differs in the elongate antenne,

the absence of vibrissee, and the feebly-developed bristles.

1. Ancylogaster armata. (Tab. XIII. figg. 16, ¢; 164, profile; 164, head.)

Ancylogaster armatus, Bigot, Bull. Soc. Ent. Fr. 1884, p. Ixx’.

Black ; face whitish; sides of the front, some markings on the thorax, second abdominal segment, and incisions

of the following segments yellow; legs rufous, with black tarsi; wings brownish along the costa.

Length 11 millim.

Frontal band shining black, much broader than the sides; antenne black, the second joint somewhat reddish

at the tip; arista rufous. Thoracic dorsum anteriorly with four yellow spots; the transverse suture of

the same colour; on the pleure a perpendicular stripe appearing white in certain lights; scutellum

rufous, with the base blackish. The first abdominal segment black; the second yellow, transparent,

with a dorsal stripe and the hind margin black ; the following segments black, with a narrow yellow

front-border ; the fourth and fifth segments with some light grey reflections ; the sixth segment, turned

towards the venter, bears a cylindrical appendage, and ends in a pair of forceps with parallel branches ;

on the hind margins of the first three segments are lateral macrochetw, and on that of the third there is

also a pair of dorsal ones ; all the macrochete very minute. Legs almost bare; coxe black, with white

reflections ; femora and tibiz rufous, the front femora on the upper and inner sides black, the other

femora with a black stripe; tarsi black, except the terminal joint, which is yellow, like the foot-claws

and pulvilli; femora with some minute bristles, the bristles of the tibie alittle longer. Tegule yellowish.

Wings greyish, with the costa yellowish-brown ; small cross-vein slightly before the middle of the discal

cell; curvature of the fourth vein with a very short appendage; apical cross-vein nearly straight ;

posterior cross-vein slightly curved.

Hab. Mexico} (coll. Bigot), Orizaba (coll. Bellardi).

There is a single male of this species in Bigot’s collection and another in that of

the late Professor Bellardi, in Turin. The female is unknown. At first sight this

insect has the aspect of a Conops. |

DIPTERA. 457

CLINOGASTER * (to follow the genus Ancylogaster).

Clinogaster, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 189 (1892).

Head:a little broader than the thorax; front slightly prominent, nearly as broad as the eyes (¢), with

parallel sides, somewhat enlarged near the root of the antennz; frontal bristles weak ; no orbital bristles

(3); on the vertex two stronger bristles; face slightly inclined, bare; cheeks broad, their inferior

portion as long as one-third of the longitudinal diameter of the eyes; vibrissam rudimentary; occipu

swollen. Eyes bare. Antenne elongate, scarcely shorter than the face; first joint very short, the

second much longer, the third twice as long as the second; arista bare. Proboscis a little longer than

the head, with distinct terminal lips; palpi....(?). Thorax quadrate, with macrochete. Abdomen

elongate, curved downward, composed of four segments; the first three of equal length, the anal segment

much shorter, the second segment the broadest; macrochete very short and few in number, only at the

hind margins of the segments; male-genitalia somewhat exserted. Legs rather slender, with scattered

bristles ; front tarsi longer than the tibie ; foot-claws and pulvilli elongate(¢). Tegule large. Wings

shorter than the abdomen ; apical cell closed and shortly petiolated ; curvature of the fourth vein with

an acute angle and with a short appendage ; posterior cross-vein beyond the middle between the small

cross-vein and the curvature of the fourth vein.

1. Clinogaster notabilis. (Tab. XIII. figg. 17, ¢; 17a, head.)

Clinogaster notabilis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 189°.

Black ; face and reflections on the thorax whitish ; hind margins of the first two abdominal segments narrowly

yellow ; anal segment and base of the antenne rufous; wings with a brown shadow at the end of the

costa, their base yellowish.

Length 12°5 millim.

Front blackish ; face and posterior orbits whitish, with silvery reflections ; cheeks cinereous ; occiput black.

Antenne brownish-black, the basal joints, the base of the third, and the arista rufous. Proboscis shining

black (palpi not visible in the single specimen seen). Thorax and scutellum black; the thorax with

some white tomentum in front and with four black stripes, the two median linear, the outer ones much

broader ; pleurse with white reflecting spots. Abdomen black; first and second segments with a narrow

yellow hind-border ; third segment somewhat cinereous; anal segment dark rufous; genitalia turned

towards the venter ; some short macrochete at the hind margins of the second, third, and anal segments.

Legs black; coxee on the front side with white reflections; tibie piceous ; front femora with regularly-

arranged, rather short bristles on the upper and under sides; middle and hind femora with some longer

bristles beneath; middle and hind tibize with some long bristles; foot-claws and pulvilli elongate, the

pulvilli blackish, with a yellowish tip. Tegule brownish-grey, with a narrow yellowish border. Wings

grey, their base brownish-yellow, this coloration extending along the costa; at the end of the costa a

more obscure brown spot, descending to bencath the third vein ; small cross-vein oblique, a little beyond

the middle of the discal cell ; apical and posterior cross-veins distinctly curved ; petiole of the apical cell

bent upward ; the costal vein prolonged a little beyond the end of the third vein.

Hab. Mexico!, Venta de Zopilote in Guerrero (H. H. Smith).

A single male specimen.

PENTHOSIA f (to follow the genus Clinogaster).

Penthosia, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 189 (1892).

Head as broad as the thorax ; front slightly prominent, broad in both sexes; frontal bristles weak, on the

vertex two stronger bristles ; face somewhat inclined, on each side in its superior half with a row of fine

hairs ; cheeks broad, their inferior portion more than half as long as the longitudinal diameter of the

* xdivw (to bend); yaorje (abdomen),

t+ 7wé:Oos, mourning-cloth.

458 SUPPLEMENT.

eyes; vibrissee very weak and not longer than the hairs by which they are accompanied; occiput

inferiorly swollen. Eyes bare. Antenne obliquely exserted; basal joints short and nearly equal in

length; third joint much longer; arista on the upperside towards the end with a microscopic pubescence.

Proboscis shorter than the head; palpi slightly thickened towards the tip. Thorax quadrate, densely

haired, but without macrochets, except at the sides. Abdomen cylindrical, of equal breadth over its

whole length, posteriorly curved downwards, the segments indistinctly separated ; macrochets marginal

and very short ; male-genitalia somewhat developed and turned towards the venter. Legs hairy and with

scattered bristles; foot-claws and pulvilli elongate in the male. Tegule rather small. Wings longer

than the abdomen ; apical cell closed and petiolated, its petiole bent upward ; curvature of the fourth

vein rectangular and with a short appendage, which, however, is sometimes absent ; posterior cross-vein

at a short distance from the curvature of the fourth vein.

1. Penthosia satanica., (Tab. XIII. figg. 18; 18a, head.)

Scopolia satanica, Bigot, Ann. Soc. Ent. Fr. 1888, p. 254°.

Penthosia satanica, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 190”.

Iintirely deep black, including the antenne, oral parts, legs, tegule, and wings.

Length 11-12°5 millim.

Head velvety-black, the oral margin and the ocellar prominence only are shining ; sides of the front and of the

face with silvery-white reflections. Third joint of the antenne five times as long as the second. Thorax,

scutellum, and abdomen shining black, the abdomen with a metallic tint; ventral side densely pilose in

the male. Pulvilli yellowish-grey. Tegule and wings brownish-black ; a small somewhat hyaline spot

immediately behind the inferior basal cell ; apical and posterior cross-veins distinctly curved.

Hab. Muxtco!2, Rio Papagaio, Tierra Colorada, Rincon, Acaguizotla, Xucuma-

natlan, and Omilteme in Guerrero, Teapa in Tabasco (H. H. Smith), San Blas in

Jalisco (Schumann).

A long series, including both sexes. One of our specimens has been compared by

Bigot himself with his type of Scopolia satanica, and there can be no doubt of the

identification of the species. The insect is not a Scopolia in the sense of Robineau-

Desvoidy, the author of the genus, nor in that of Schiner (‘ Fauna Austriaca’). It is not

even a true Tachinid, but seems to belong, with Ancylogaster and Clinogaster, to the

Phanine. All three of them may be included in the Group XXXIX., Schineride, of

Brauer and v. Bergenstamm (Denkschr. Akad. Wiss. Wien, lvi. p. 140). They agree

in having an elongate, curved abdomen, long, slender, and more or less exserted

antenne, and rudimentary or feebly-developed vibrisse and abdominal macrochete.

Ancylogaster has the apical cell opened and the eyes descending to near the inferior

part of the head. In Clinogaster and Penthosia the apical cell is closed and petio-

lated, and the eyes are remote from the underside of the head. In Penthosia the

second joint of the antenne is scarcely longer than the first, and the third nearly five

times as long as the second ; in Clinogaster the second joint is much longer than the

first, and the third joint no more than twice as long as the second; moreover, the

thorax of Clinogaster shows distinct macrochete, whilst that of Penthosia is densely

pilose and without bristles, |

(Mr. Townsend (Ann. & Mag. Nat. Hist. (6) xix. p. 32 (1897) has recorded

P. satanica from San Rafael, Vera Cruz.—Eb. |

DIPTERA. 459

TACHININE (pp. 5, 41, 210).

DEJEANIA (p. 7).

Dejeania rutilioides (p. 9).

To the localities given, add:—Mexico, Xucumanatlan and Omilteme in Guerrero

7000 to 8000 feet (H. H. Smith).

Specimens of both sexes have been received from Mexico. In the female joints

2—4 of the front tarsi are dilated, a character which is not mentioned by Jaennicke.

Dejeania corpulenta (p. 9).

To the localities given, add :—Mexico, Omilteme in Guerrero (H. H. Smith), Mexico

city and Atoyac (Schumann), Jalapa (M. Trujillo).

One of the males from Omilteme is not more than half the size of the others.

In the collection of the late Professor Bellardi, in Turin, I have also seen several

Mexican specimens. These latter vary not only in size, but also in the development

of the palpi, which in some of them are much thinner than usual.

Dejeania plumitarsis (p. 10).

To the localities given, add :—Mexico, Omilteme in Guerrero (H. H. Smith).

One female.

6. Dejeania montana.

Dejeania montana, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 190°.

Thorax blackish, indistinctly striped; face and cheeks yellowish-white; scutellum and abdomen rufous, anal

segment black ; antenne and legs piceous; palpi rufous.

Length 9-11°5 millim.

Front blackish-grey, posteriorly narrower (¢) or broader (2) than the eyes; frontal band more or less

reddish-brown, scarcely differing in colour from the rest of the front; frontal bristles in the male weak,

on both sides in a double row, in the female less numerous, but stronger; face prominent below; beard

and pilosity of the occiput yellow. Antenne black, but showing a tendency to become reddish, especially

on the basal joints ; second joint with a long and several shorter hairs ; third joint as long as the second,

but broader, rounded at the tip; arista thickened to beyond the middle. Proboscis shining black; palpi

pale rufous, black-haired, distinctly prominent, though shorter than in the other species of the genus.

Thorax anteriorly with some grey tomentum and three black lines close to each other; the posterior

margin somewhat rufous ; thoracic dorsum densely set with black hairs; scutellum rufous, with a double

row of black spines. Abdomen broadly ovate, rufous, slightly transparent, with black hairs and spines ;

the anal segment, with the exception of the front border, black; second and third segments with a double

row of dorsal spines, the second also with three or four lateral spines; on the hind margin of the third

segment the dorsal and lateral spines form a continuous row; on the ventral side the second and

third segments have a small cluster of spines; anal segment with numerous spines on the ventral, as

well as on the dorsal surface. Legs piceous, nearly black; foot-claws and pulvilli elongate in the

male, the claws slightly rufous at the base, the pulvialh yellowish; the first and third pairs of tibix

outwardly with a row of short bristles; middle tibie outwardly with very long and stout bristles.

460 SUPPLEMENT.

Tegule brownish-yellow. Wings brownish, the colour deeper towards the base ; small cross-vein on the

middle of the discal cell; apical cross-vein concave near its base; posterior cross-vein slightly curved.

Hab. Mexico !, Xucumanatlan, Omilteme, and Sierra de las Aguas Escondidas in

Guerrero 7000 to 9500 feet (H. H. Smith).

A long series of specimens of both sexes. This species much resembles Jurinia

dichroma, differing, however, in the more elongate palpi, which reach as far as the tips

of the vibrissee, this character bringing the insect into the genus Deeania. It seems

to be very nearly related to D. armata, Wiedem. (Aussereur. zweifl. Ins. 1. p. 287),

from Cuba, and to D. analis, Macq. (Diptéres Exot. ii. 3, p. 34), from Mexico.

In both these species the abdomen is likewise rufous, with the anal segment black,

but the legs are for the greater part rufous, and in D. analis the palpi are black.

'‘D. brasiliensis, Rob.-Desv. (Essai sur les Myod. p. 33), seems to be yet another

allied form.

HYSTRICIA (p. 11).

1 (a). Hystricia testaceiventris.

Hystricia testaceiventris, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 190°.

Thorax blackish ; scutellum and abdomen yellowish; head whitish; antenna, palpi, and legs black; third

joint of the antenne twice as long as the second; wings infuscated.

Length 13°5 millim.

Face and cheeks greyish-white; the face inferiorly prominent; front blackish, narrowed behind and there

narrower than the eyes; frontal band dark brown; frontal bristles in part stout, four or five of them descend-

ing beneath the root of the antenne; beard white. Antenne black, with grey reflections; second joint

with a long and several shorter bristles ; third joint rather narrow, twice as long as the second; arista

indistinctly jointed, thickened to beyond the middle. Proboscis shining black; palpi black, slightly

thickened towards the tip and with black bristly hairs. Thorax black, with some bluish reflection ;

thoracic dorsum before the transverse suture with some grey tomentum and indistinct black lines ;

scutellum yellowish-rufous, with black spines. Abdomen cordiform, broader than the thorax, yellowish-

testaceous, somewhat transparent; second and third segments with an interrupted black dorsal stripe

and densely beset with black spines; anal segment black, with numerous black hairs and spines. Legs

with many bristles, those on the outside of the middle tibia longer; foot-claws and pulvilli rather

elongate, yellowish, the claws with black tips. Tegule brownish-yellow. Wings brownish; small

cross-vein on the middle of the discal cell; apical cross-vein concave at its base; posterior cross-vein

distinctly curved and inserted on three fourths of the apical cell.

Hab. Mexico!, Xucumanatlan in Guerrero 7000 feet (A. H. Smith).

A single male specimen. This species must be placed immediately after H. albiceps,

vy. d. Wulp, with which it agrees in the black colour of the antenne, palpi, and legs,

but differs from that insect in the yellowish coloration of the scutellum and abdomen.

Hystricia infuscata (p. 12).

There is a female of this species from Mexico in the collection of Professor Bellardi.

It agrees with the one described by me (anted, p. 12), but the coloration is less obscure,

the third antennal joint is rufous (like the basal one), and the wings have a darker

rufous tint. |

DIPTERA. 461

Hystricia ambigua (p. 13).

To the localities given, add :—Mexico, Amula, Xucumanatlan, Omilteme, Sierra de

las Aguas Escondidas, Atoyac (H. H. Smith).

Hystricia pollinosa (p. 14).

_ To the localities given, add:—Mexico (coll. Bellardi), Amula, Xucumanatlan, and

Teapa (H. H. Smith), Yucatan (Gaumer).

Hystricia soror (p. 15).

To the localities given, add :—Muxico, Navarrete, Tepic (Schumann), Amula,

Xucumanatlan, Omilteme, and Sierra de las Aguas Escondidas in Guerrero, Fortin in

Vera Cruz (H. H. Smith), Tuxpango (coll. Bellardt).

Hystricia amena (p. 16). |

' There is a male and a female of this species from Mexico in the collection of

Prof. Bellardi.

Hystricia micans (p. 16).

To the localities given, add :—Mexico, Omilteme and Xucumanatlan in Guerrero

(H. H. Smith), Tuxpango (coll. Bellardi).

The female from Xucumanatlan differs from the others in the more obscure

- coloration of the antenne and the legs.

Hystricia abrupta (p. 17).

Hystricia fulvida, Bigot, Bull. Soc. Ent. Fr. 1887, p. cxxxix’; Ann. Soc. Ent. Fr. 1888, p. 797.

To the localities given, add :—Mexico, Rinconada (Schaus).

Bigot’s type of H. fulvida was from North America °.

Hystricia dorsalis (p. 17).

To the localities given, add:—Mexico, Xucumanatlan in Guerrero 7000 feet

(H. H. Smith).

Two males and one female.

Hystricia pyrrhaspis (p. 18).

To the localities given, add:—Mexico (coll. Bellardi), Atoyac in Vera Cruz

(Schumann, H. H. Smith), Jalapa (M. Trujillo).

14. Hystricia albosignata.

Hystricia albosignata, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 190'.

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1908. 30

462 SUPPLEMENT.

Thorax cinereous, with four black stripes ; scutellum yellowish-rufous ; abdomen red, with black dorsal spots

and trigonal white markings; head yellowish; antenne black, with the basal joints rufous; palpi and

legs yellow ; wings brownish.

Length 13-15°5 millim.

Belongs to the group of H. abrupta, H. pyrrhaspis, and H. dorsalis, and is distinguished by the white dorsal

markings on the abdomen. Face and cheeks pale ochraceous, the face nearly perpendicular and scarcely

prominent towards the oral margin; front cinereous, much narrowed behind (in 3); frontal band

blackish, above the antenne ending in a more or less rufous callosity ; frontal bristles on both sides in a

single row, but ending next the basal joints of the antenne in a double row; in the female a pair of

more robust lateral bristles ; vibrissa accompanied by several shorter bristles ; beard yellow; pile of the

occiput yellowish. Antenne not descending beneath the inferior part of the eyes; basal joints rufous ;

second joint with several black bristles; third joint black (sometimes more or less rufous at the base),

not broader than the second and nearly twice as long as it; arista thickened on the proximal half,

Proboscis and palpi yellowish-rufous, the palpi with black bristles. Thorax yellowish-cinereous, with

four distinct black stripes, which are interrupted at the transverse suture and do not reach the hind

margin; pleure ochraceous; scutellum yellowish-rufous, with cinereous tomentum and many black

spines. Abdomen broadly ovate, brownish-red, slightly transparent; first segment in the middle black ;

second segment with a large, third with a smaller black dorsal spot ; the second and following segments

each with a narrow silvery-white front-margin and white, elongate-trigonal, dorsal markings; the

abdomen is armed with many spines, which are more numerous on the dorsal and lateral parts; anus

densely beset with black hairs. Legs yellow, the femora sometimes reddish; the bristles of the legs are

neither stout nor long, even those of the middle tibie ; the spurs of the tibize and some of the other

bristles yellow; foot-claws and pulvilli yellow, in the male elongate and surrounded by yellow hairs, the

claws with dark tips. Tegule ochraceous, with pile of the same colour. Wings brownish; small cross-

vein a little before the middle of the discal cell; apical and posterior cross-veins curved.

Hab. Mexico!, Xucumanatlan and Omilteme in Guerrero 7000 to 8000 feet

(H. H. Smith).

Several males. A female from Sierra de las Aguas Escondidas, 9500 feet (H. H.

Smith), seems to belong to the same species; it agrees in all the characters, except

that the white markings on the abdomen are scarcely visible.

SAUNDERSIA (p. 18).

As some species are to be added to those already mentioned, it may be useful to give

here a new synoptic table of all the Central-American members of this genus which

are now known to me :—

1. Abdomen black (sometimes with a white or yellow marking),

testaceous, grey, or rufous with black dorsal spots ; first segment

laterally with spines or bristles . . . . ee ee 2.

Abdomen yellow, with black or rufous apex ; first segment laterally

2. Legs fulvous or yellow, at least the tibize rufous . se e 8

Legs black. . . . es i

3. Ground-colour of the abdomen black . ee

Ground-colour of the abdomen rufous. . . . . ~ . . 102.

4, Abdomen unicolorous (seldom with some whitish reflections) . . 5.

Abdomen with a sharply delineated yellow or white marking on

DIPTERA. 463

5. Thorax and antenne black . . . ° . oe . . + ochripes, v. d. Wulp.

Thorax cinereous ; antenne with at least their basal joints rufous. 6.

6. Scutellum and tegule rufous (third antennal joint very broad), . Jaticornis, v. d. Wulp.

Scutellum cinereous; tegulz whitish or brownish-yellow. . . . 7.

7. Legs rufous, sometimes darker; abdomen without any whitish

reflection . 2. 2. 6. ee ee ee ew ew ee ee reefitibia, v. d. Wulp.

Legs ochraceous ; anal segment with whitish reflections. . . . 8.

8. Femora unicolorous with the tibie and tarsi . . . . . . . montivaga, v.d. Wulp.

Femora (except the tip) black . . . . 2... 1 ws) femorata, v. d. Wulp.

9. Scutellum black ; the marking on the abdomen golden-yellow . macula, Macq.

Scutellum reddish-brown ; the marking on the abdomen white . albomaculata, Jaenn.

10; Pilosity of the abdomen (between the spines) red or rufous. . . rufopilosa, v. d. Wulp.

Pilosity of the abdomen black . . . . . . . . . . ) .) Onigropilosa, v. d. Wulp.

11. Thorax blackish, anteriorly with some grey tomentum . . . . wunicolor, v. d. Wulp.

Thorax cinereous . . re 22

12. Abdomen grey, with black markings tee ee ew ee we Cand, Vv. A. Wulp.

Abdomen testaceous or brownish-yellow . . . oe 13.

13. Foot-claws yellow, with black tips; scutellum and abdomen dark

testaceous 2 ww ee ee ee ee ew we ee) «testacea, V. d. Walp.

Foot-claws black ; scutellum and abdomen yellowish-testaceous . consanguinea, v. d. Wulp.

14, Antenne and legs black . . . 2. . woe ee ew ee) «(Gtpartita, v. ds Wulp.

Antenne, or at least their basal joints, and legs rufous (the tarsi

black). 2. 2 we ee ee ee ee ee ee CE

15. Seutellum black, with macrochetz (third antennal joint broad

and truncate) . 2 2 6 1 ee ee ee ew eee treuncaticornis, v. d. Wulp.

Scutellum rufous, with spines . . . 1. 1. 1 we ee ee Ceta, v. d. Walp.

2 (a). Saundersia montivaga.

Saundersia montivaga, v. d. Wulp, Tijdschr. voor Ent, xxxv. p. 190°.

Thorax and scutellum cinereous; abdomen black, the anal segment with faint whitish reflections; head

yellowish ; antenne rufous, with the third joint black; legs ochraceous; wings brownish.

Length 14:5 millim.

Head yellowish-white; front cinereous, as broad as the eyes (¢) or broader(?); frontal band brown ;

frontal bristles descending a little beneath the root of the antenne; cheeks with some weak, pale yellow

pile; beard of the same colour. Basal joints of the antenne rufous; second joint with some short hairs

and a longer bristle; third joint black, ovate, as long as the second ; arista indistinctly jointed, tapering

towards the tip. Proboscis shining black. Thorax and scutellum cinereous ; thoracic dorsum with

blackish lines. Abdomen shining black; the white reflections on the anal segment forming a more or

less distinct front-border, which is sometimes interrupted in the middle. The scutellum and abdomen

are densely beset with spines. Legs ochraceous; femora and tibie with long black bristles; the tarsi

have no bristles, except some very small ones at the end of the joints; foot-claws and pulvilli yellow, the

claws with black tips. Tegule yellowish-white. Wings brownish; small cross-vein a little before the

middle of the discal cell; apical cross-vein concave at its base and for the rest straight; posterior cross-

vein curved.

Hab. Mextco1, Xucumanatlan and Omilteme in Guerrero 7000 to 8000 feet

(H. H. Smith).

30 2

464 SUPPLEMENT.

One male and two females. This species and the following are allied to S. laticornis,

of which the male only is known. It differs, however, in the cinereous coloration of

the scutellum and in the whiter tegule.

2(z). Saundersia femorata.

Saundersia femorata, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 191°.

Thorax and scutellum cinereous; abdomen black, the anal segment with faint whitish reflections; head

yellowish ; antenne rufous, with the third joint black; legs ochraceous, with black femora; wings

brownish.

Length 11-12°5 millim.

Closely allied to S. montivaga, and perhaps a variety of it; but differing from that species in having the femora

black, except at the tip. The white reflections on the anal segment are on the front-border, from which

issues a white dorsal band.

Hab. Mexico 1, Omilteme and Sierra de las Aguas Escondidas in Guerrero 8000 to

9000 feet (1. H. Smith).

One male and two females.

Saundersia albomaculata (p. 21).

To the localities given, add:—Muxico, Xucumanatlan, Omilteme, and Sierra de

las Aguas Escondidas in Guerrero (H. H. Smith), Tuxpango (coll. Bellardt).

Saundersia rufopilosa (p. 22).

To the localities given, add:—Mexico, Puebla (Godman), Cuesta de Misantla

(M. Trujillo), Cuernavaca, Omilteme (H. H. Smith), Angangueo (coll. Bellardt).

[Recorded by Mr. Townsend [Ann. & Mag. Nat. Hist. (6) xix. p. 32 (1897) from

San Rafael, Vera Cruz.—Eb. |

Saundersia nigropilosa (p. 23).

To the localities given, add :—Mexico (coll. Bellardi), Omilteme and Sierra de las

Aguas Escondidas (H. H. Smith).

Specimens of both sexes have been received from Guerrero.

Saundersia unicolor (p. 23).

To the localities given, add :—Mexico (coll. Bellardi), Xucumanatlan (H. H. Smith).

There is a pair of this species in Bellardi’s collection, and two males have been

received from Mr. Smith.

Saundersia rufitibia (p. 24).

To the localities given, add:—Mzexico (coll. Bellardi), Acaguizotla, Xucumanatlan,

Amula, Omilteme, and Sierra de las Aguas Escondidas (H. H. Smith).

DIPTERA. 465

The description of this species (anted, p. 24) was taken from a single female, but

in the collections subsequently received from Mexico there are numerous examples of

both sexes. It proves to be quite distinct from S. wnicolor, of which males and

females are now known. The antenne usually have the basal joints, and sometimes

even the base of the third joint, more or less rufous. ‘The femora are generally black,

and the tibie and tarsi rufous. The scutellum is usually black, but in some well-

preserved specimens it is covered by cinereous tomentum, like the thorax. The male

is very like the female, but has a narrower front and elongate foot-claws and pulvilli.

The length varies from 8 to 11-5 millim.

In Prof. Bellardi’s collection there are four specimens (1 ¢ and 3 2 ) from Mexico.

Saundersia testacea (p. 24).

To the localities given, add:—Mexico (coll. Bellardi), Omilteme in Guerrero

8000 feet (H. H. Smith).

There is a pair of this species in Professor Bellardi’s collection. ‘The female agrees

with the male, except in the broader front and the shorter pulvilli and foot-claws; the

latter are likewise yellow, with black tips; the front tarsi are not dilated.

The female specimen from Guatemala (noticed on p. 25, antea) belongs to

S. consanguined.

9 (a). Saundersia consanguinea.

Saundersia consanguinea, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 191".

Thorax blackish ; scutellum and abdomen brownish-yellow ; antenne and legs (including the foot-claws) black.

Length 14°5 millim.

Closely allied to S. testacea, v. d. Wulp, but differing from it in the black foot-claws and the yellowish colora-

tion of the scutellum and abdomen, and, in the male, in the narrower front, which posteriorly is not

more than half as broad as the diameter of the eyes. In the female the hind margin of the thorax is

yellowish, like the scutellum and abdomen.

Hab. Mexico! (coll. Bellardi), Xucumanatlan and Omilteme 7000 to 8000 feet

(A. H. Smith); Guatzmata, San Gerénimo (Champion).

One male and three females have been seen.

Saundersia bipartita (p. 25).

To the localities given, add :—Muextco (coll. Bellardi), Vera Cruz, Atoyac, Sierra de

las Aguas Escondidas, and Omilteme (H. H. Smith).

13. Saundersia leeta.

Saundersia leta, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 191°.

Thorax cinereous; scutellum rufous; abdomen yellow, with the anal segment dark rufous; antenne blackish ;

legs rufous, with black tarsi; wings brownish.

Length 10°5 millim.

466 SUPPLEMENT.

Head yellowish-white ; front broader than the eyes; frontal band narrow, brownish, sometimes inconspicuous ;

frontal bristles descending a little beneath the root of the antenne, in the female less numerous but

stronger ; face perpendicular, prominent towards the oral margin; cheeks with weak yellow hairs, but

without a black bristle; beard yellowish. Antenne black, but sometimes partly rufous; third joint

longer and broader than the second ; arista distinctly jointed, tapering towards the tip, microscopically

pubescent. Proboscis shining black. Thorax with a cinereous, somewhat rufous tomentum, indistinct

stripes, a pale yellow pile, and black macrochete; pleure pale rufous; scutellum rufous, on the hind

margin with some long spines. Abdomen convex, yellow, transparent, with short yellowish pile ; a black

spot under the scutellum; anal segment dark rufous; on the hind margin of the first and second

segments some black dorsal spines, the second segment also with four or five lateral ones; third segment

with some discal and a continuous row of marginal spines; anal segment densely beset with black hairs

and spines. Legs rufous, the tarsi black; underside of the femora with yellowish hairs and black

bristles; the bristles of the tibize rather long, especially those on the outside of the middle pair; foot-

claws and pulvilli yellow, the claws with black tips. Tegule rufous. Wings brownish; small cross-vein

a little before the middle of the discal cell; apical and posterior cross-veins oblique and curved.

Hab. Mexico}, Xucumanatlan and Omilteme 7000 to 8000 feet (H. H. Smith).

Six males and two females. This insect is nearly allied to S. d¢partita and S. trun-

caticornis, agreeing with the latter (of which the female only is known) in the rufous

coloration of the legs and in many other respects ; but it differs from that species in

the absence of genal bristles, the pale pilosity of the thorax, the rufous pleure and

scutellum, the less obscure tegule and wings, &c.

JURINIA (p. 27).

Several additional representatives of this genus having come to hand since the

publication of the preceding pages, a revised table of the species is required.

1, Abdomen yellow, with the apex black. . . . . . . « . « . dichroma, v.d, Wulp.

Abdomen unicolorous (black or brownish-red) . . . . . . . .

Palpi yellow or rufous . . . soe ee ee . 38.

3. Second and third abdominal segments with spines at the hind margin

only 2. 1 we ee ee ee ee ee 4.,

Abdomen densely beset with spines over its whole surface 8.

4. Foot-claws yellow or rufous, with black tips. . . . . . . 5.

Foot-claws black. . 2. 6. 1. 2 2 1 ww 7.

5. Scutellum and abdomen brownish-red. . . . «. «. . «. . . . adusta,v. d. Wulp.

Scutellum and abdomen black or dark piceous . . . ~ 2... 6.

6. Spines of the abdomen few in number; front tarsi not dilated (2) . congruens, v. d. Wulp.

Spines of the abdomen more numerous, forming transverse rows on

the hind margin of the second and third segments; front tarsi

slightly dilatedim 2. 6 w/w ee ww ee ew we. mitidula, v. a. Wulp.

Tegule whitish . . . . Foe ee ee we ew ww. nepticula, v. d. Wulp.

8. Third antennal joint longer than the second. . . 1. . . . . . assimilis, v. d. Wulp.

Third antennal joint not longer than the second . . . . . . . spinigera, y.d. Wulp.

DIPTERA. 467

Jurinia dichroma (p. 27).

To the localities given, add :—Mexico, Misantla (Godman).

This species seems to be very nearly allied to J. apicalis, Jaenn., but differs in the

frontal band being black instead of rufous.

Jurinia adusta (p. 28).

To the localities given, add :—MeExico, Orizaba, Tuxpan (coll. Bellardi), Cuernavaca,

Atoyac, Rio Papagaio (Hf. H. Smith), N. Yucatan (Gawmer).

Among the additional specimens seen there are four females belonging to the variety

with ochraceous head, and three females with the front tarsi not dilated, these latter

agreeing in other respects with the normal form.

4, Jurinia nitidula.

Jurinia nitidula, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 191°.

Thorax cinereous, with blackish lines; scutellum and abdomen shining bluish-black ; antennal base and palpi

rufous; legs black ; second and third abdominal segments only with marginal spines.

Length 11-12 millim.

Face and cheeks yellowish-white, the cheeks with hairs of the same colour; front yellowish-cinereous, in both

sexes broader than the eyes; frontal band blackish, but with light grey reflections ; beard and pilosity of

the front and the occiput pale yellow ; frontal bristles, in the male, on both sides in a double row and

somewhat irregular; in the female the outer row represented by no more than three or four bristles.

Basal joints of the antenne rufous; second joint bristly ; third joint black, as long as the second, rounded

at the tip. Proboscis shining black; palpi pale rufous, thickened towards the end, with short black

bristles. Thorax with a yellowish-cinereous tomentum, which anteriorly wholly hides the ground-

colour and shows some black lines, the two median lines convergent towards the head; the thoracic

dorsum has a pale yellow pile and regular rows of black macrochete. Scutellum with many spines,

which anteriorly are shorter and erect, but on the hind margin are long and directed backward.

Abdomen broad and convex, with black hairs and spines, the latter forming transverse rows at the hind

margin of the second and third segments; on the anal segment several spines between the hairs. Legs

with many bristles, those on the outside of the middle and hind tibie longer; front tarsi somewhat

dilated in the female; foot-claws and pulvilli (elongate in the male) yellow, the claws black at the tip.

Tegule reddish-brown. Wings with a brownish-grey tint; small cross-vein on the middle of the discal

cell; apical cross-vein curved at its base and forming an acute angle with the fourth vein ; posterior

cross-vein nearly straight.

Hab. Mezxico1, Santiago Ixcuintla in Jalisco and Tepic (Schumann), R. Papagaio,

Acaguizotla, Chilpancingo, Amula, Xucumanatlan, Omilteme, and Acapulco, all in

Guerrero (H. H. Smith).

Several specimens of each sex.

5. Jurinia spinigera.

| Jurinia spinigera, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 192°.

Thorax and scutellum cinereous ; abdomen bluish-black, with spines over the whole surface ; antenne black,

rufous at the base; legs black.

Length 11 millim.

468 SUPPLEMENT.

Nearly allied to J. nitzdula, from which it differs in having the scutellum covered with cinereous tomentum,

and the abdomen armed with many spines, which are not ranged in rows, but cover its whole surface; the

legs, especially the tarsi, are more slender, the front tarsi still less dilated.

Hab. Mexico!, Xucumanatlan and Omilteme in Guerrero 7000 ‘to 8000 feet

(H. H. Smith).

Two females.

6. Jurinia punctata.

Jurinia punctata, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 191°.

Black ; thorax anteriorly cinereous ; head yellowish ; basal joints of the antenne rufous, third joint brown ;

palpi rufous; spines of the third abdominal segment in a transverse row ; wings with a brown spot on

the small cross-vein.

Length 11 millim.

Head pale yellow ; front a little broader than the eyes ; frontal band reddish-brown ; frontal bristles on both

sides in a curved row, descending nearly as far as the end of the second antennal joint; exterior to them

two strong orbital bristles; cheeks with weak black hairs; beard and pilosity of the occiput whitish.

Third antennal joint elliptical, a little shorter than the second. Proboscis shining black ; palpi pale

rufous, filiform, scarcely thicker towards the tip. Thorax black, anteriorly with some cinereous tomentum

and indistinct black stripes; scutellum black, with many spines, those on the hind margin longer and

turned backward. Abdomen broadly ovate, black, and black-haired, the spines (as in J. adusta) not

covering the whole surface, those on the hind margin of the third segment arranged in a row. Legs

black, with many bristles ; on the outside of the middle tibiw the bristles are longer; front tarsi not

dilated ; foot-claws black, pulvilli whitish. Tegule blackish. Wings with a brownish tint; small cross-

vein bordered with brown and nearly on the middle of the discal cell; apical and posterior cross-veins

infuscated and curved.

Hab. Mexico}, Omilteme in Guerrero 8000 feet (H. H. Smith).

A single female specimen. This species may perhaps be identical with Echinomyia

fuliginipennis, Macq. (Suites & Buffon, Dipt. ii. p. 77), from Brazil: the description

(though referring to the male sex only) applies, so far as it goes ; but Macquart subse-

quently (Dipt. Exot. ii. p. 39) states that EF. fuliginipennis is synonymous with Tachina

bicolor, Wiedem., and gives a figure of the head. According to this figure the palpi

are much thicker than in Jurinia punctata, which cannot possibly be the same as

Tachina bicolor, Wiedem., the latter having the abdomen densely beset with spines.

7. Jurinia nepticula.

Jurinia nepticula, v. d, Wulp, Tijdschr. voor Ent. xxxv. p. 191°.

Thorax cinereous; scutellum testaceous; abdomen shining black, laterally dark rufous; head yellowish ;

antenne rufous, with the third joint black ; palpi rufous; legs black; spines of the second and third

abdominal segments at the hind margin only ; tegule whitish.

Length 10-5 millim.

Closely allied to J. punctata, from which it differs in having the scutellum testaceous and the sides of the

abdomen reddish-brown ; in the male this latter colour is more conspicuous, and only a dorsal band and

the anal segment are black; the spines on the abdomen are less numerous; the tegule whitish.

Hab. Mexico1, Amula and Xucumanatlan in Guerrero (H. H. Smith).

Two males and three females.

DIPTERA. 469

8. Jurinia assimilis.

Jurinia assimilis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 192°.

Black ; head pale yellow: antenne black or brown; frontal bristles descending irregularly beneath the root

of the antenne ; palpi fulvous; abdomen densely spinose; wings brownish-grey.

Length 11-16 millim.

Nearly allied to J. adusta. Antenne longer than in that species and of a darker coloration, mostly black,

with the apical part of the second joint and a spot on the posterior part of the third reddish ; the bristles

of the second joint longer and closer together; the third joint longer than the second. The abdomen is

. darker, in the female black, its whole surface covered with spines, those at the hind margin of the

segments longer. The foot-claws are yellow, with a black tip; the front tarsi not dilated in the female.

- Hab. Mexico 1, Venta de Zopilote, Chilpancingo, Xucumanatlan, Omilteme, Atoyac,

Teapa (H. H. Smith), N. Yucatan (Gaumer).

Several specimens of each sex.

9. Jurinia congruens.

Jurinia congruens, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 192".

Black; head pale ochraceous: antenne and palpi rufous; frontal bristles descending irregularly beneath the

root of the antenne; spines of the second and third abdominal segments at the hind margin only.

Length 11-13 millim.

Allied to J. adusta and J. assimilis. The antenne are rufous, the third joint sometimes partly brown ; second

‘joint as in J. assimilis ; third joint as long as the second. The abdomen is dark piceous(¢ )or black(@);

the spines are less numerous than in J. adusta; the foot-claws yellow, with a black tip; the front tarsi

not dilated in the female.

Hab. Mexico!, N. Yucatan (Gaumer).

«One male and two females.

BELVOSIA (p. 29).

Belvosia bifasciata (p. 30).

To the localities given, add: —Mexico, Guadalajara (Schumann), Chilpancingo, Amula

(H. H. Smith).

Specimens of both sexes have been received from Mexico. [This species and

B. bicincta, R.-Desv., are recorded by Mr. Townsend [Ann. & Mag. Nat. Hist. (6) xix.

p. 33 (1897)] from San Rafael, Vera Cruz.—Eb. |

Belvosia leucophrys (p. 30).

_To the localities given, add :—Mexico, Chilpancingo, Amula, Omilteme, Cuernavaca,

Atoyac, Teapa (/. H. Smith).

Many specimens of this species have been sent from Mexico, as well as others (from

Orizaba, Atoyac, and N. Yucatan) of what I take to be a variety of it. In these latter

the spines on the scutellum and abdomen are almost entirely absent, the abdomen being

thickly covered instead with short black hairs, which give it a velvety appearance.

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1903. 3p

470 SUPPLEMENT.

3. Belvosia weyenberghiana.

Belvosia weyenberghiana, v. d. Wulp, Tijdschr. voor Ent. xxvi. p. 26, t. 1. fig. 16°.

Hab. Mexico, Venta de Zopilote, Amula, Teapa (H. H. Smith), Mexico city

(Schumann), Vera Cruz (Godman), Tuxpan (coll. Bellardi), N. Yucatan (Gaumer).—

ARGENTINA },

A male and a female of this species were bred by Mr. Godman from cocoons of a

Bombycid-moth (Automeris cecrops, Boisd.) brought by him from Vera Cruz. The

Argentine specimen described by me! was also bred from a moth, Saturnia argentina,

by Prof. Weyenbergh.

4, Belvosia bicolor.

Blepharipeza bicolor, Macq. Dipt. Exot., Suppl. 1, p. 158, t. 20. fig. 7°.

Hab. Nortu America, Texas !.—MeExico, Atoyac, Teapa (H. H. Smith).

Four males. ‘These agree with Macquart’s description 1, except that they have the

frontal band velvety-brown (instead of black), and the tarsi piceous or yellowish-rufous.

The frontal bristles are weak and descend on both sides in a single row to as far as the

end of the second antennal joint; the facial ridges are beset with a row of bristles,

reaching halfway down the face; there is a row of bristly hairs along the inner orbit

of the eyes. The foot-claws are yellow, with black tips. The abdomen has macro-

cheetee on the anal segment only, which, moreover, is densely haired.

Blepharipeza bicolor, Schiner (Dipt. Novara Reise, p. 336), from South America, is

probably a different species, as this author describes the abdomen as more densely

spinose than in the other members of the genus.

5. Belvosia leucopyga.

Belvosia leucopyga, v.d. Wulp, Notes from the Leyden Museum, iv. p. 84°; Tijdschr. voor Ent.

XXVi. p. 277.

Hab. Mexico, N. Yucatan (Gauwmer).—Braziu } ?,

ECHINOMYIA (p. 31).

The following new synoptic table is given to include the additional species that

have come to hand from Mexico since my previous enumeration of the members of

this genus :—

1. Cheeks with one or more bristles . . . 2. 2. 1. ee se es

2. Abdomen yellow or rufous, with the anal segment black. . . . flaviveniris, v.d. Wulp.

Abdomen black or piceous, sometimes laterally rufous or with a

rufous apex . , 6 6 2 6 ew we ew we ee ee 8B,

DIPTERA.

. Antenne wholly black. 2. 1. 1 6 1 1 ee ee ee

Basal joints of the antennz rufous . 2 , oe eee

4, Abdomen partly rufous and with cinereous or whitish front-

borders to the segments . . 2

Abdomen shining black, unicolorous or nearly so . .

. Third abdominal segment with marginal macrochete only; anal

segment laterally with whitish reflections

471

cinerascens, Big.

robusta, Wiedem.

generosa, v. d. Wulp.

Third abdominal segment with discal and marginal macrochete ;

anal segment without whitish reflections ~ . ee ee 6compascua, v. d. Wulp.

6. Scutellum concolorous (cinereous or blackish) with the thoracic

dorsum. 2. 1. 1 6 ee ee ee ee ee

Scutellum reddish or testaceous, more or less contrasting in

10,

diaphana, Fabr.

coloration with the thoracic dorsum . . . 1. 6 ee es

7. Abdomen rufous, with a black dorsal stripe. . . . .

Abdomen shining black or piceous, at most laterally somewhat

rufous... ew ee ee ee ee te ee ee 8B.

8. Tegule blackish. . 2 2 eee ee ee ee we ee nigrocalyptrata, v.d.Wulp.

Tegule whitish . . .. . coe . wee ee DD

9. Abdomen shining black, the anal segment, at t least laterally, with

analis, Fabr.

picea, Rob.-Desv.

whitish reflections . . a

Abdomen piceous, without whitish reflections . . . 2. « «

tO. Abdomen black, with whitish reflecting spots; palpi scarcely

thickened towards the tip. . . . . te ee ee

palpi distinctly

piliventris, v. d. Wulp.

Abdomen shining black, laterally dark rufous ;

thicker towards the tip. . . . . 2. « . dispar, v. d. Wulp.

Echinomyia robusta (p. 32).

To the localities given, add :—MeExico, Orizaba (H. H. Smith,

Guanajuato (Schumann), Chilpancingo, Amula, Xucumanatlan, and Omilteme (A. /.

Smith).

Godman), Jaral in

1 (a). Echinomyia cinerascens.

Echinomyia cinerascens, Bigot, Bull. Soc. Ent. Fr. 1888, p. 256°;

nota’.

v. d. Wulp, antea, p. 210,

Cinereous; head whitish; cheeks with two or three bristles; scutellum rufous; abdomen black, with

cinereous tomentum ; antenne and legs black; palpi yellowish, very thin.

Length 11°5 millim.

Face and cheeks sericeous-yellowish-white ; cheeks next the eyes with three bristles, the lower one weaker

than the others and sometimes absent; front broader than the eyes, yellowish-cinereous ; frontal band

somewhat rufous, sometimes inconspicuous ; frontal bristles descending on each side in a curved row

to about as far as the middle of the second antennal joint; beard and pile of the occiput yellowish.

Antenne black; second joint with a rufous border at the tip and with some short bristles ; third joint

round, broader and a little shorter than the second. Proboscis shining black ; palpi yellowish, filiform,

with some short black bristles towards the tip. Thorax black, with cinereous tomentum and some

3p 2

472 SUPPLEMENT.

indistinct black stripes; scutellum rufous, with cinereous tomentum. _. Abdomen ovate, black or piceous,

with a whitish-cinereous tomentum, especially at the front border of the second and following segments ;

at the hind margin of the second segment four macrochete, two dorsal and one on each side; at the hind

margin of the third segment a row of macrochete; anal segment with several macrochete. Legs black,

the hind tibiee somewhat rufo~piceous; with many bristles, those on the outside of the middle tibiz longer;

foot-claws and pulvilli elongate (in the ¢), the pulvilli yellowish. Tegule whitish. Wings cinereous,

yellowish at the base ; small cross-vein on the middle of the discal cell ; apical and posterior cross-veins

distinctly curved.

Hab. Mexico! ? (cold. Bellardi), Amula in Guerrero (H. H. Smith).

‘Three males of this species have been seen by me.

1 (s). Echinomyia generosa.

Echinomyia generosa, v. d. Wulp, Tijdschr. voor Ent: xxxv. p. 192°.

Thorax cinereous, with black lines; scutellum testaceous ; abdomen shining black, the anal segment

laterally with whitish reflections; second and third segments with marginal macrochete only; head

yellowish; two genal bristles; basal joints.of the antenne rufous; palpi yellowish, very thin;

_ legs black.

Length 9-18 millim.

Face and cheeks yellowish, the latter with two bristles next the eyes; front cinereous, broader than the “eyes 5

frontal band rufous ; frontal bristles on each side in a curved row, scarcely descending beneath the root

of the antenne ; beard and pile of the occiput’ yellowish. Basal joints of the antenne rufous; second

joint with some bristles; third joint black, rounded, broader and a little shorter than the second.

Proboscis shining black ; palpi yellowish, filiform, with some black bristles at the tip. Thorax black,

with cinereous tomentum and four black stripes, which are more conspicuous before the transverse suture,

‘the inner ones narrower; scutellum testaceous. Abddémen ovate, shining black, with a slight bluish tint;

on the anal segment laterally a whitish reflection ; macrochetz present: four on the hind margin of the

second segment (two dorsal and two lateral), a.row on the hind margin of the third segment, and several

on the anal segment. Legs black, with many bristles, those on the outside of the middle tibie longer;

front tarsi dilated in the female ; foot-claws and pulvilli elongate in the male, the claws black, the pulvilli

yellowish, truncate at the tip. Tegule grey, with a yellowish margin. Wings brownish-grey ; small

cross-vein on the middle of the discal cell; apical cross-vein curved at the base; posterior cross-vein

curved.

Hab. Mexico! (coll. Bellardi), Xucumanatlan and Omilteme in Guerrero 7000 to

8000 feet (H. H. Smith). |

Four males and six females. This species, especially the female of it, resembles

E. analis (Fabr.), but differs in having genal bristles and in the thin, filiform palpi.

Tachina seminigra, Wiedem. (Aussereur. zweifl. Ins. ii. p. 296), included by Schiner

inthe genus Echinomyia, must also be a nearly allied form ; but as Wiedemann piaced

it among the species with the second and third antennal joints of equal length, and

E. generosa has the third joint distinctly shorter, | do not think that they can be

the same.

Wiedemann’s specimen of Z. seminigra was from Brazil, and those of Schiner from

Chili and Colombia.

DIPTERA. 47

1c). Echinomyia compascua.

Echinomyia compascua, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 192°.

Thorax cinereous, with black lines; scutellum piceous; abdomen shining black, third segment with discal

and marginal macrochete; head yellowish; two genal bristles; basal joints of the antennze rufous}

palpi yellowish, filiform.

Length 11 millim.

Hab. Mexico 1, Omilteme in Guerrero 8000 feet (1. Hl. Smith).

Four males. Very like L. generosa, but differing from that species in having more

numerous macrochete on the abdomen (there being some present on the disc of the

third segment), and the anal segment without whitish reflections.

1 (vp). Echinomyia diaphana.

Tachina diaphana, Fabr. Syst. Antl. p. 308'; Wiedem. Aussereur. zweifl. Ins. ii. p. 281°.

Echinomyia vittata, v.d. Wulp, Tijdschr. voor Ent. xxvi. p. 21°.

Hab. Mexico, Venta de Zopilote, Rincon, Tepetlapa, Chilpancingo, Xucumanatlan,

Omilteme (H. H. Smith), Tuxpan (coll. Bellardi).—Souta America! ?, Argentina °.

Several specimens, mostly males. They agree with £&. vittata, v. d. Wulp, which is

inseparable from £. diaphana (Fabr.).

Echinomyia analis (p. 33).

To the localities given, add:—Mexico, Jalisco, Tepic (Schumann), Mexico

city, Orizaba, Rincon, Chilpancingo, Atoyac, Teapa (H. H. Smith), N. Yucatan

(Gaumer).

Echinomyia nigrocalyptrata (p. 33).

To the locality given, add:—Mexico, Atoyac, Teapa (H. H. Smith), N. Yucatan

(Gaumer).

Specimens of both sexes of this species have now been received from Mexico.

In some of them the third antennal joint is not black, but of the same rufous colour

as the basal joints (transitions, however, to the normal form prove that this character

has no specific value). Except for the usual sexual differences (a broader front, short

foot-claws and pulvilli, &c.), the female is very like the male; it has the front tarsi

slightly dilated. . négrocalyptrata may be distinguished from Z. analis (Fabr.) by

the blacker thorax and scutellum, the stouter palpi, the dark tegule, and the less

shining abdomen, the latter without whitish or greyish reflections on the anal segment.

Amongst the additional material I have found some males which seem to be inter-

mediate between these two species.

AT4 SUPPLEMENT.

4 (a). Echinomyia picea.

Echinomyia picea, Rob.-Desv. Essai sur les Myod. p. 44’; Macq. Dipt. Exot. 11. 3, p. 37, t. 2.

fig. 4?; v. d. Wulp, Tijdschr. voor Ent. xxvi. p. 20°.

Hab. Norta America, Quebec ®.—MeExico, Venta de Zopilote in Guerrero, Atoyac

(H. H. Smith).

Several males, one of them having the abdomen dark red.

Echinomyia piliventris (p. 34).

To the localities given, add:—Mexico, Venta de Zopilote, Chilpancingo, Atoyac

(H. H. Smith).

The female of this species is now known to me; it has, as usual, a broader front

and shorter foot-claws and pulvilli, and the front tarsi are not dilated. £. piliventris

is very like a dark-coloured specimen of LE. robusta, but easily recognizable by the

thicker palpi and the absence of genal bristles, and in the female by the undilated

anterior tarsi.

A badly-preserved female from Northern Yucatan (Gaumer) may perhaps belong to

this species, though the thorax and scutellum are densely covered with cinereous

tomentum, and the abdomen is wholly brownish-red with white reflecting spots.

MICROPALPUS (p. 34).

Micropalpus fulgens (p. 34).

To the localities given, add:—-Mexico, Venta de Zopilote, Chilpancingo, Amula,

Xucumanatlan, Omilteme (H. H. Smith).

A long series of this species has now been received from Mexico.

2. Micropalpus angustifrons..

Micropalpus angustifrons, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 193°.

Head yellowish; front narrow; third antennal joint dark rufous; thorax whitish, with four black stripes ;

abdomen piceous, with white spots; legs black.

Length 7 millim.

Front much narrowed behind, half as broad as the diameter of the eyes; frontal band black ; eyes distinctly”

pilose. Antenne shorter than the face; basal joints black; second joint with some bristles ; third joint

twice as long as the second, dark rufous, with the outlines brown; arista indistinctly jointed, gradually

tapering towards the tip. Thorax and scutellum shining black, with a bluish tint and a whitish tomentum,

which is most conspicuous on the shoulders and on the front margin, where it is interrupted by four

black stripes. Abdomen piceous, laterally and on the anal segment somewhat rufous; the white spots

are most distinct on the base and at the sides; the genitalia are rather prominent, complicated, and

rufous in-colour; macrochete in the middle as well as on the hind margin of the segments. Legs black;

on the front femora (above and beneath) the bristles are long and regularly arranged ; outer edge of the —

front tibie with a row of short, and that of the intermediate pair with several long and stout, bristles.

Tegule white. Wings yellowish-hyaline; venation as usual in the genus AMicropalpus.

Hab. Mexico!, Teapa in Tabasco (H. H. Smith).

Three males.

DIPTERA. 4

TRICHOPHORA (p. 35).

Siphoniomyia, Bigot, Bull. Soc. Ent. Fr. 1885, p. xii.

Six Central-American species of the genus Zrichophora are now known to me, and

they may be distinguished as follows :—

1, Abdominal segments with discal and marginal macrochetz (abdo-

men ovate; exterior cross-veins oblique). . . . . . . . . 2

Abdominal segments with marginal macrochetx only. . . . . 3.

2. Rufous species. . 6 6 1 1 ww ee ee ee we reeftna v. d. Walp. /

Black species . 2. 2 1. 1 ee ee ee we ee ee. melas, Bigot.

3. Abdomen ovate; apical cross-vein in a similar oblique position to

the posterior cross-vein . . . . 1... wee ee 4.

Abdomen conical; apical cross-vein perpendicular, the apical cell

thus ending at a greater distance from the wing’s tip . . . . 5

4, Basal joints of the antenne rufous . . . . . 1. 1 ee fucata, v. A. Wulp.

‘Antenne wholly black . . 2. 1... ek ee es convexinervis, v. d. Wulp.

5. Three genal bristles . . . 1 1 1. w 1 1 ew we we e Erisetosa, v. d. Wulp.

A single genal bristle 2. 2 . 1. 1 1. 1 1. 1 ww we nitidifrons, v. d. Wulp.

Trichophora rufina (p. 36).

To the localities given, add:—Mexico, Atoyac in Vera Cruz (H. H. Smith).

1 (a). Trichophora melas.

Siphoniomyia melas, Bigot, Bull. Soc. Ent. Fr. 1885, p. xii’.

Black ; face and cheeks white; cheeks with a single bristle; abdomen laterally rufous, with discal and

marginal macrocheete ; tegule white; wings dark brown.

Length 7 millim.

Front broader than the eyes, black, somewhat shining; frontal band brown, opaque; frontal bristles

descending irregularly to a little beneath the root of the antenne ; face and cheeks sericeous-white ; oral

margin prominent; on the cheeks next the orbits a row of weak hairs and a stout bristle ; immediately

above the vibrissw one shorter bristle and beneath them some other bristles; beard white; occiput grey.

Antenne black ; second joint with some bristles; third joint twice as long as the second, much broader

and obliquely truncated at the end ; arista thickened to near the tip, with a very short pubescence, which

is only perceptible under a strong lens. Proboscis black, exserted, longer than the head. Thorax,

scutellum, and abdomen shining black; thorax anteriorly with some white tomentum and indistinct

black stripes; abdomen ovate, convex, laterally rufous; anal segment with a faint whitish tomentum;

macrochete as in 7’. rufina. Legs black; front tibie with short bristles on the outer edge; middle and

hind tibia with many long and stout bristles; foot-claws and pulvilli rather elongate, especially those on

the front and middle tarsi, the pulvilli yellow. Tegule white. Wings dark brown; small cross-vein

on the middle of the discal cell ; apical and posterior cross-veins oblique, the apical deeply concave at its

base, the posterlor convex.

Hab. Mexico (coll. Bigot ').

The above description is taken from the well-preserved typical specimen kindly

communicated by M. Bigot. It isa male (not a female, as stated in his description 1),

476 SUPPLEMENT.

the foot-claws and pulvilli being elongate. ‘The inconspicuous pubescence on the

arista may have induced him to refer the insect to the Dexine.

In his analytical table of that group (Revue d’Entomologie, 1888, p. 260), Bigot

distinguishes the genus Siphoniomyia by the rudimentary appendage at the curvature

of the fourth vein; this appendage, however, is merely a small fold in the wing’s

surface.

1 (s). Trichophora fucata.

Trichophora fucata, v. d. Wulp, Tijdschr. voor Ent. xxxy. p. 193°.

Shining black; head whitish ; basal joints of the antenna rufous; two (seldom three) bristles on the cheeks ;

macrocheetee of the second and third abdominal segments at the hind margins only.

Length 9 millim.

In facies this species is like 7’. rufina, but in coloration and in the absence of discal macrochete on the

intermediate segments it stands nearer 7’. trisetosa and T. nitidifrons.

Fae and cheeks yellowish-white; the cheeks with two or three bristles ; front laterally shining bluish-black ;

frontal band brown ; frontal bristles in a double row. Basal joints of the antennew dark rufous; the

third black, twice as long as the second, convex on its front side; arista thick. Anterior margin of the

thorax with’ a yellowish-white tomentum and the commencement of four black stripes; pleuree with an

oblique band of similar omentum extending from the shoulders to the middle cox. Abdomen ovate, on

the base and laterally on the fourth segment with whitish reflections; this segment piceous or dark

rufous. Legs black; bristles on the outer side of the middle tibie long and stout; foot-claws and pulvilli

elongate in the male, the pulvilli fuscous, with yellowish outlines. Tegule whitish. Wings grey,

brownish towards the costa ; venation as in 7’. rufina; the third vein a little more curved before its end.

Hab. Mexico} (coll. Bellardi), Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith).

Several specimens of both sexes.

1 (c). Trichophora convexinervis.

Trichophora convexinervis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 193°.

Shining black ; head greyish ; cheeks with a single bristle; macrochetw of the second and third abdominal

segments at the hind margins only ; posterior cross-vein curved outwards.

Length 7 millim.

Very nearly allied to T. fucata, but smaller; the antenne wholly black; the cheeks usually with a single

bristle (in one of the specimens two are ‘present) ; thoracic dorsum anteriorly with some grey tomentum

and obsolete black stripes; abdomen ovate, shining black, the anal segment dark rufous; tegule and

wings brownish, the latter more obscure along the costa; the posterior cross-vein distinctly curved

outwards.

Hab. Mexico! (coll. Bellardi*), Omilteme and Xucumanatlan in Guerrero (H. H.

Smith).

Two males and three females.

Trichophora trisetosa (p. 36).

To the locality given, add :—-Mexico, Tampico (coll. Bellardi), Atoyac in Vera Cruz

(H. H. Smith).

* Specimen labelled “ Coscon.”—Perhaps intended for Coscomatepec, Vera Cruz?

DIPTERA. A477

One male and three females have been received from Mr. Smith. The male has

the abdomen somewhat rufous at the sides, but for the rest is very like the female,

except that the foot-claws and pulvilli are more elongate. Of the three genal bristles

the inferior one is smaller than the others and seems to be absent in some individuals.

This species is a little more robust than 7. nttidifrons, and has the apical and

posterior cross-veins slightly curved (in 7. nitidifrons they are straighter and the

apical cross-vein has a still more perpendicular direction).

Trichophora nitidifrons (p. 37).

To the locality given, add :—-Mexico (coll. Bellardi), Dos Arroyos, Venta de Zopilote,

Tepetlapa, Amula, Atoyac, Teapa (H. H. Smith), Orizaba (Godman & H. H. Smith),

N. Yucatan (Gawmer).

The numerous specimens now received vary from 55-10 millim. in length, the

smallest ones being females.

GYMNOMMA (p. 38).

2. Gymnomma, discors.

Gymnomma discors, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 193°.

Thorax cinereous ; scutellum, abdomen, legs, and basal joints of the antenns rufous, third antennal joint

black ; third and anal abdominal segments with discal and marginal macrochete.

Length 8 millim.

Face and cheeks ochraceous; front yellowish-cinereous, as broad as (3), or broader than the eyes (2);

frontal band dark rufous, narrower behind; frontal bristles nearly as in Gt. nitidiventris; cheeks with

yellow hairs. Basal joints of the antenne rufous, the second bristly on its upper part; third joint black,

ovate, a little longer and much broader than the second; arista thickened in its proximal half. Proboscis

shining black. Thorax yellowish-cinereous; before the transverse suture with some indistinct dark

stripes ; scutellum rufous, with long macrochete at the hind margin. Abdomen convex, broadly ovate,

rufous, with some indication of blackish dorsal spots; macrochets at the hind margins of the segments

and discal macrochete as well on the last two segments. Legs rufous; tarsi usually brownish ; foot-

claws and pulvilli yellow, the claws with a black tip; in the male the claws and pulvilli elongate ;

bristles of the legs as in G@. nitidiventris. Tegule yellowish-rufous. Wings dark grey, rufous at the

base ; venation nearly as in G. nitediventris.

Hab. Mexico! (coll. Bellardi), Xucumanatlan and Omilteme in Guerrero 7000 to

8000 feet (H. H. Smith).

Ten males and two females of this species have been sent by Mr. Smith. It much

resembles Saundersia nigropilosa, but can easily be distinguished from that insect by

the non-spiniform macrochete of the abdomen.

On account of the presence of discal macrochete on the last abdominal segments in

G. discors, the characters of the genus, as they are given on p. 38 (anted), must be

altered in this respect.

BIOL. CENTR.-AMER., Dipt., Vol. II., May 1903. 39

478 SUPPLEMENT.

NEMOCHZETA (p. 38).

Since the commencement of this volume was published three other species of

Nemocheta have been added by me; the four now known may be distinguished as

follows :—

Base of the wings dark fuscous . . . «6 ee 8 ee ee ee

2. Abdomen laterally rufous in the male (sometimes also, but in a less

degree, in the female); sides of the front cinereous . . . . . « dissimilis, v. d. Wulp.

Abdomen black, without any rufous portion; sides of the front shining

black. 2. 0. 1 ee ee ee ee ee eee ww ee frontalis, v. d. Wulp.

3. The fuscous colour on the wings reaching no farther than the two inferior

basal cells 2 2 1 ee ew ee ee ee nitida, v. d. Wulp.

The fuscous colour on the wings extending to the end of the first vein ;

and over the small cross-vein. . . . 1. ee + ee ee) tnfuscata, v. d. Wulp..

Nemocheta dissimilis (p. 39 *).

To the locality given, add:—Mexico, Atoyac, Teapa (H. H. Smith), N. Yucatan

(Gaumer).

Three males and five females, varying from 7°5-10 millim. in length; some of the

females have the abdomen rufous at the sides, though less conspicuously so than in

the. males.

2. Nemocheta frontalis.

Nemocheta frontalis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 194’.

Black, including the antennz and legs; head whitish; front laterally bluish-black ; tegulee and base of the

wings dilute brown.

Length 11 millim.

Head yellowish-white ; front as broad as the eyes, bluish-black, shining ; frontal band opaque, deep black ;

beard and pilosity of the occiput yellowish. Antenne black ; second joint bristly on the upper part;

third joint about twice as long as the second ; arista thickened to beyond the middle. Proboscis black ;

palpi fulvous. Thorax and scutellum black; anterior margin of the thorax with grey tomentum.

Abdomen convex, shining black or piceous ; macrocheta as in IV. dissimilis. Legs with many bristles,

those on the outer side of the middle tibiee long and stout; foot-claws elongate, yellowish, with a

black tip. The wings and their venation as in the above-named species; their base and the tegule

brownish.

Hab. Mexico 1, Atoyac in Vera Cruz (H. H. Smith).

Two males.

* The reference to the Plate is incorrectly given on this page as “Tab. V. figg. 18, 18a”: it should be

“Tab. II. figg. 18, 18a”; and the same remark applies to Gymnomma nitidiventris (p. 88) and Gronia

mewicana (p. 40), where the Plate is quoted as “ V.” instead of “IT.”

DIPTERA. 479

3. Nemocheta nitida.

Nemocheta nitida, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 194°.

Shining black; head whitish; palpi and at least the basal joints of the antenne rufous; tegule and base of

the wings dark fuscous.

Length 10 millim.

Distinguished by the shining black coloration ; the thorax, however, has some white tomentum on its front

margin and on the shoulders. The head is yellowish-white, the front cinereous; frontal band brown, a

little narrowed behind, reaching neither the root of the antenne nor the vertex; frontal bristles descending

irregularly on both sides to as far as the middle of the second antennal joint; cheeks with some hairs

near the eyes; beard and pilosity of the occiput pale yellow. Antenne rufous; third joint as long as the

second, convex on the front side and black for the most part. Proboscis black; palpi pale rufous.

Scutellum piceous. Abdomen convex; macrochate robust, on the hind margins of the second and third

segments and on the whole surface of the fourth segment. Legs black, with many bristles, those on the

outer side of the posterior, and especially of the middle, tibia very long and stout ; front tarsi not dilated

in the female; foot-claws black, pulvilli yellowish ; in the male the claws and pulvilli elongate. Tegule

brown. Wings greyish hyaline, the base up to beyond the humeral cross-vein and to the end of the two

inferior basal cells dark fuscous; small cross-vein infuscated, under the middle of the mediastinal cell

and a little before the middle of the discal cell; apical and posterior cross-veins oblique and slightly

curved.

Hab. Mexico !, Cuernavaca in Morelos (1. H. Smith).

Three males and one female.

4. Nemocheta infuscata.

Nemocheta infuscata, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 194°.

Body and legs black; head whitish; antenne rufous, the third joint brown at the tip; palpi ochraceous ;

tegule, base of the wings, and the proximal part of the costa dark fuscous.

Length 10°5 millim.

Nearly allied to N. nitida: the grey tomentum of the thorax is more extended; the abdomen is less shining

and has a piceous tint ; the dark coloration of the wings covers not only the two inferior basal cells, but

also the whole superior basal cell and reaches on the costa to as far as the end of the first vein.

Hab. Murxico1, Teapa in Tabasco (H. H. Smith).

A single female specimen.

GONIA (p. 39).

Gonia mexicana (p. 40).

To the locality given, add :—Mexico, Rincon, Amula, and Xucumanatlan in Guerrero

(A. H. Sinith).

GYMNOCH ETA (p. 40).

Gymnocheta reinwardti (p. 40).

To the localities given, add :—-Mexico, Teapa in Tabasco (H. H. Smith).

A female from Teapa agrees well with the male previously recorded by me, and,

like it, has the head yellow. ‘The antenne, however, are rufous (not black, as indicated

in Wiedemann’s description), and it is probable that they vary in colour.

og 2

480 SUPPLEMENT.

2. Gymnocheta subviridis.

Gymnocheta subviridis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 194°.

Thorax and scutellum metallic green, with grey tomentum; abdomen violet; head whitish; antenne and legs

black ; palpi rufous.

Length 9 millim.

Resembles G. reinwardti, 9 , but differs in the much less metallic coloration, the thoracic dorsum and the

scutellum only having a metallic-green ground-colour, which, however, for the most part is covered by a

grey tomentum ; the abdomen is neither green nor steel-blue, but dark violet. The front is grey, without

any conspicuous metallic ground-colour ; the face and cheeks are whitish ; the eyes clothed with a dense

yellowish-grey pile. Antennz wholly black; third joint twice as long as the second; arista thickened

to a little beyond the middle; palpi rufous, curved upwards and slightly thickened towards the tip. The

macrocheete of the abdomen are long. The legs are very bristly, especially on the outer side of the middle

tibia, where the bristles are long. The curvature of the fourth vein forms a right angle (in G. retnwardti

it has an acute angle); the posterior cross-vein is nearly straight.

Hab. Mexico ! (coll. Bellardi).

A single female specimen.

8. Gymnocheta alcedo.

Gymnocheta alcedo, Liéw, Dipt. Amer. Sept., Cent. viii. no. 61°.

Hab. Norra America!.—Mexico, Atoyac in Vera Cruz (Schumann), Teapa in Tabasco

(H. H. Smith).

Two females, agreeing with Léw’s description, which gives the third antennal joint

as elongate (nearly twice as long as the second). In one of our specimens the antenne

are not entirely black, but partly rufous.

DISTICHONA (p. 44).

Distichona varia (p. 44).

In the four additional specimens (two of each sex) received from Omilteme, Mexico,

the apical cell of the wings is closed, and the hind tibiz are more or less rufous.

CNEPHALIA (p. 45).

Brauer and von Bergenstamm (Denkschr. Akad. Wissensch. Wien, lvi. p. 100, and

Ivili. p. 8353) have divided their group “ Goniide” into two sections—one with the

arista three-jointed, and the other with it two-jointed. In the first section they include

Gonia, Meig., and Pseudogonia, Br. & v. B. (Gonia cinerascens, Rond.); in the second

Onychogonia, Br. & v. B., Spallanzania, Rond., and Cnephalia, Rond., the three latter

genera differing only in the relative length of the antennal joints and in that of the

joints of the arista. ‘These last-mentioned characters, however, seem to me to be

insufficient for generic separation. I therefore prefer to include, at least for the

present, all the forms with a two-jointed arista in the one genus, Cnephalia.

DIPTERA. 481

In addition to the four species already enumerated by me (anted, pp. 45-47), one

other has been diagnosed by me elsewhere. .

5. Cnephalia ochriceps.

Cnephalha ochriceps, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 194".

Cinereous ; head and anal segment ochreous; frontal band, four thoracic stripes, reflections on the abdomen,

third antennal joint, and legs black; palpi and basal joints of the antenne rufous.

Length 11:5 millim.

Head bright ochraceous ; front much broader than the eyes; frontal band black, narrower than the lateral

portions and sometimes appearing as a double stripe; frontal bristles in two rows, the inner row descending

to beneath the second antennal joint; on each side two orbital bristles, which are stouter and directed

forwards, and on the vertex two pairs of bristles, the hind pair the longest; face perpendicular, without

white reflection; facial ridges with a row of bristles, extending two-thirds the length of the face; cheeks

broad, with black hairs; occiput grey; beard whitish. Antenne elongate; basal joints rufous; third

joint bristly, linear, four times as long as the second, descending as low as the eyes; arista thickened to

near the end, its second joint (the first being inconspicuous) three times as long as broad. Proboscis

black ; palpi cylindrical, rufous. Thorax cinereous, with four black stripes, which are less distinct behind

the transverse suture; pleure grey; scutellum cinereous, slightly rufous towards the hind margin.

Abdomen ovate, cinereous, with black reflections; anal segment bright ochraceous. Macrochete of the

abdomen, legs, tegulas, and wings as in C. obesula, the base of the wings, however, without yellowish tint.

Hab. Mexico!, Santiago Ixcuintla in Jalisco (Schumann), Amula in Guerrero

(H. H. Smith).

A single female specimen from each locality.

MEIGENIA (p. 58).

Meigenia flaviventris (p. 59).

To the locality given, add :—MeExico, Venta de Zopilote in Guerrero (4. H. Smith).

2(a). Meigenia albifacies.

Meigenia albifacies, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 194°.

Blackish ; front borders of the second and third abdominal segments cinereous; head white; frontal band,

antenna, and legs black; palpi rufous.

Length 6 millim.

Head silvery-white ; front narrower than the eyes; frontal band narrower than the lateral portions ; frontal

| bristles descending as far as the end of the antennal joint ; two orbital bristles, which are directed

forwards. Eyes very slightly pilose. Antenne shorter than the face; second joint bristly ; third joint

three times as long as the second. Proboscis black ; palpi pale rufous, distinctly enlarged towards the

tip. Thorax and scutellum blackish ; the shoulders whitish. Abdomen ovate; first segment black ;

second and third segments cinereous, with black reflections and black hind-borders, each with two

marginal macrochete. Hind tibice outwardly with a row of short bristles ; foot-claws and pulvilli short:

Tegule whitish. Wings greyish-hyaline ; small cross-vein on the middle of tke discal cell; curvature or

the fourth vein with a blunt angle; apical and posterior cross-veins straight.

Hab. Mexico}, Venta de Zopilote in Guerrero (H. H. Smith).

A single female specimen. Allied to MZ. flaviventris, but differing in the more purely

482 SUPPLEMENT.

white, almost silvery, head, the absence of yellow coloration on the abdomen, which is

not at all transparent, and the shorter (not fringe-like) bristles on the hind tibie *.

EXORISTA (p. 60).

12. Exorista geminata.

Masipoda geminata, Brauer & v. Bergenst. Denkschr. Akad. Wiss. Wien, lvi. p. 162 (1889)’.

Ezorista latimana, v. d. Wulp, antea, p. 67 (1890) °*.

The above change in the synonymy (as already noted, anted, p. 211) is required. I

do not think that the dilatation of the front tarsi in the female, nor the ciliation of the

hind tibiz in the two sexes, is sufficient for generic separation.

15 (a). Exorista leuconota.

Exorista leuconota, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 195°.

Head and thoracic dorsum whitish; abdomen grey, with black reflections and black hind-borders to the

segments; antenne and legs black ; proboscis yellowish-rufous.

Length 8 millim.

Front somewhat narrower than the eyes; frontal band only indicated by a longitudinal groove, which is a little

enlarged above the points of insertion of the antenne ; frontal bristles few in number ; vibrisse surmounted

by some shorter bristles; beard white. Eyes densely pilose. Antenne a little shorter than the face;

third joint four times as long as the second ; arista thickened in nearly half its length. Thoracic dorsum

with a whitish tomentum and obsolete dark lines; viewed in some directions it has a blackish coloration,

and then the sides and a line on the transverse suture are white; scutellum blackish, its hind border

grey. Abdomen conical, grey ; the first segment and the hind borders of the following segments black ;

blackish reflections are also visible, but there is no black dorsal stripe; ventral surface blackish-grey

with white incisions; marginal macrochetee only present. Underside of the femora with bristly hairs,

which are longer on the first and second pairs; middle tibize with two bristles beneath; hind tibiee with

rather long bristles. Tegule white. Wings hyaline, with a faint greyish tint ; small cross-vein on the

middle of the discal cell; third vein arcuate before its end; apical cross-vein very slightly concave;

posterior cross-vein nearly straight.

Hab. Mexico}, Amula in Guerrero 6000 feet (H. H. Smith).

A single female specimen. In its general aspect and coloration this species is

extremely like E. flavirostris. The head, however, is more purely white and shows

no yellowish tint; the frontal band is nearly absent; the antenne and face are shorter ;

the eyes do not quite reach the inferior part of the head; the abdomen is not so broad

and more conical, and has more extended blackish reflections, on account of which the

black hind-borders of the segments are less defined and the black dorsal stripe less

conspicuous. ‘The bristly hairs on the underside of the femora are much longer and

more numerous; the hind tibize have outwardly a row of bristles of unequal length,

while in EL. flavirostris these bristles are short and fringe-like, except for a longer one

in the middle. ‘he third vein in the wings is distinctly curved.

* [The type is now without abdomen.—Ep.]

DIPTERA. 483

PHOROCERA (p. 75).

_ Phorocera atriceps (p. 79).

Phorocera melanoceps, Bigot, Ann. Soc. Ent. Fr. 1888, p. 260’.

I have examined a typical specimen of Bigot’s species, and find that it does not differ

from P. atriceps, both being from Mexico!, The French author's name has priority,

but I do not propose to adopt it, the word melanoceps not being grammatically

composed.

Phorocera xanthura (p. 80).

To the locality given, add :—Mexico, Amula in Guerrero (H. H. Smith).

The male received from Amula agrees with the description, which was taken from a

female, except in the following points:—The frontal band is blackish-brown and less

sharply limited; the palpi have a rufous tip *. and the sides of the second and third

abdominal segments are somewhat ochraceous.

22. Phorocera tenuiseta.

Phorocera tenuiseta, Macq. Dipt. Exot., Suppl. 1, p. 166°.

Hab. Mextco, Xucumanatlan in Guerrero 7000 feet (7. H. Smith), — Gutana,

Cayenne |.

The female specimen from Guerrero agrees very well with the description of

Macquart 1, the insect being elongate in shape and having the first abdominal segment

as long as the following. As in P. sobrina and P. setigera (antea, p. 84), the third

vein has a row of short bristles extending from the base to the small cross-vein, a

character not mentioned by Macquart.

The analytical table (anted, p. 76) must be amended to include the present species :—

16. First abdominal segment as long as the following . . - - - + + tenuiseta, Macq.

First abdominal segment shorter than the following. . . . . + - 16*,

16*, Wings with a dilute brownish tint along the veins; third vein curved

before itsend . 2... ee ee eee sobrina, v. d. Wulp.

Wings without brownish tint; third vein nearly straight . . . . . setigera,v.d. Wulp.

MILTOGRAMMA (p. 88).

5. Miltogramma nana.

Miltogramma nana, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 195’.

Thorax cinereous, with three black stripes; abdomen grey, tessellated with black; frontal band, antenne,

and legs black.

Length 3°5 millim.

* In the analytical table, antec, p. 76, under no. 8 (lines 22 and 23), the words ** Palpi black ” and “ Palpi

rufous” should be erased.

484 SUPPLEMENT.

Head grey; front narrower than the eyes, with a rufous reflection, which extends over the upper portion of

the cheeks; frontal band linear, black; face white; a pair of vibrissz inserted near the oral margin.

Antenne half the length of the face ; third joint a little longer than the second ; arista thickened in its

proximal third. (Proboscis and palpi not visible in the specimen before me.) Thorax and scutellum

cinereous; thoracic dorsum with three black stripes, the median prolonged over the scutellum. Abdomen

conical, grey, with black reflecting spots, which are more or less arranged in three rows; third and anal

segments each with two marginal macrochete. Legs with some short and weak bristles. Tegule

whitish. Wings a little longer than the abdomen, greyish-hyaline; small cross-vein before the middle

of the dorsal cell; curvature of the fourth vein rectangular; apical cross-vein concave; posterior cross-

vein straight. |

Hab. Mexico}, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).

A single female specimen f.

PROSPHERYSA (p. 116).

6. Prospherysa americana.

Prosopea americana, Bigot, Ann. Soc. Ent. Fr. 1888, p. 260 -

Prospherysa contigua, v. d. Wulp, antea, p. 120 (1890) *.

I have seen a typical specimen of Bigot’s species and find that it is identical with

my P. contigua. The correction in the synonymy has already been noted by me

(anted, p. 210).

ADMONTIA (to follow the genus Polygaster, p. 139).

Admontia, Brauer and v. Bergenstamm, Denkschr. Akad. Wissensch. Wien, lvi. p. 104, t. 5. fig. 92

(1889).

The characters of Admontia are shortly but precisely described by the authors (J. ¢.).

Females belonging to it are easily recognizable by the long and dilated front tarsi. The

vibrisse are inserted just at the oral margin. The abdomen is elliptical, its basal

segment at least as long as the following. The genus was founded on an Austrian

insect, A. podomyia, Br. & v. B., and it also includes Degeeria blanda, Meig., and an

undescribed new species from North America, A. americana, Br. & v. B. In the

Mexican collection before me there is a form which seems to be closely allied to

A. podomyia, though differing in some points of detail.

In the analytical table (anted, pp. 41-44) the genus must be inserted as follows :—

35. Third antennal joint broad, convex on the front side; abdomen

Third antennal joint linear ; abdomen conical or elliptical . . . . 385%.

Cheeks without bristles . . . 2. 1... ew ee ee ee) )6~ypostena, Meig.

+ [This insect cannot now be found.—Ep.]

DIPTERA. 485

1. Admontia occidentalis.

Admontia occidentalis, v. d. Wulp, Tijdschr. voor Ent, xxxv. p. 195°.

Thorax grey, with four black stripes; abdomen black, with white front-margins to the segments ; antenne

and legs black; palpi rufous.

Length 6 millim.

Head whitish-grey, without silvery reflections ; inferior portion of the cheeks with a slight rufous tint; hind

orbits more purely white ; front broader than the eyes ; frontal band blackish ; frontal bristles descending

as far as the tip of the second antennal joint; beneath them a row of short bristles on the cheeks ; above

the vibrissee four bristles on the facial ridges; beard white. Antenne elongate, descending to the oral

margin ; the basal joints and the proximal portion of the third joint somewhat rufous, this joint for the

rest blackish. Thorax whitish-grey ; thoracic dorsum with four distinct black stripes; scutellum

triangular, flattened, blackish, with the hind-margin grey. Abdomen shining black, the seginents with

white front-borders and with discal and marginal macrochete, the marginal ones longer than the others.

Legs black; tibize with scattered bristles; front tarsi (in Q ) one and a half times as long as the tibi,

with the second and following joints dilated. Tegule whitish. Wings hyaline, with a dilute brownish-grey

tint; small cross-vein before the middle of the discal ecll; curvature of the fourth vein rounded ; apical

cell ending nearly in the wing’s tip; posterior cross-vein slightly curved inwards, a little beyond the

middle between the small cross-vein and the curvature of the fourth vein.

Hab. Mexico 1, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith).

Two females *.

ARGYROPHYLAX (to follow the genus Admontia).

Argyrophylax, Brauer and v. Bergenstamm, Denkschr. Akad. Wissensch. Wien, lvi. p. 163 (1889) ;

lviii. p. 343; Ix. p. 121.

1. Argyrophylax albincisa. (Tab. XIII. figg. 19; 194, head in profile;

19 6, head from in front.)

Tachina albineisa, Wiedem. Aussereur. zweifl. Ins. il. p. 334°.

Hab. Mexico, Amula in Guerrero 6000 feet (ZH. H. Smith). —AntTILuss, St. Thomas !.

A single female specimen of this species has been received from Mexico. The front

is broad, black, but in some lights it appears silvery-white ; the frontal band is linear

and inconspicuous, though recognizable by a row of weak and short frontal bristles.

Professor Brauer, who has seen our Mexican insect, states that it is identical with

the typical specimens in the Vienna Museum.

DEGEERIA (p. 150).

12. Degeeria nigrifacies.

Oplisa nigrifacies, Bigot, Ann. Soc. Ent. Fr. 1888, p. 268°.

Degeeria longipes, antea, p. 155°.

I have seen a typical example of Bigot’s species, which also was from Mexico. One

* [The single specimen returned by the author has been almost entirely devoured by an Anthrenus.— Eb. |

BIOL. CENTR.-AMER., Dipt., Vol. I., May 1903. or

486 SUPPLEMENT.

of the characters of the genus Oplisa, Rond., is the presence of a double row of bristles

on each side of the frontal band, whereas in the present insect a single row only 1s

present.

PHASIOPTERYX.

Phasiopteryz, Brauer and v. Bergenstamm, Denkschr. Akad. Wissensch. Wien, lvi. vp. 147 (1889).

Neoptera, van der Wulp, antea, p. 165 (1890).

1. Phasiopteryx ochraceus.

Pyrrhosia ochracea, Bigot, Ann. Soc. Ent. Fr. 1888, p. 268 a

Phasiopteryx bilimeki, Brauer & v. Bergenst. loc. cit. p. 147’.

Neoptera rufa, v. d. Wulp, antea, pp. 166, 211, t. 4. figg. 11, 12°.

The correction in the synonymy of this Mexican species’? has already been noted by

me (anted, pp. 210, 211).

[Mr. Townsend [Ann. & Mag. Nat. Hist. (6) xix. p. 33 (1897)] has described a

specimen of it from San Rafael, Vera Cruz.—Eb. |

The following species of “ Muscide Calypteree” and “ Muscide Acalyptere ” from

Mexico or Central America have been described by various authors since the com-

mencement of the publication of this Volume, in 1888, and have not been enumerated

by van der Wulp, who no doubt intended dealing with some of them in the Supplement.

Some of the “ Acalyptere” belong to families he had not reached.—Ep.

Mouscipa@ CALYPTERA.

Acroglossa tessellata, Giglio-Tos, Boll. Mus. Torino, viii. no. 158, p. 5 (1893).—

Mexico.

Aporia elegans, Giglio-Tos, loc. cit. no. 147, p. 3 (1893).—Mexico.

Belvosia bella, Giglio-Tos, loc. cit. no. 158, p. 3.—Mexico.

Blepharipoda mexicana, Giglio-Tos, loc. cit. no. 158, p. 6.—Mexico.

Chetogena carbonaria, Giglio-Tos, loc. cit. no. 158, p. 4.—Mexico.

cincta, Giglio-Tos, loc. cit. no. 158, p. 4.—Mexico.

gracilis, Giglio-Tos, loc. cit. no. 158, p. 4.—Mexico.

Chetona cruenta, Giglio-Tos, loc. cit. no. 147, p. 3.—Mexico.

Clistomorpha ochracea, Giglio-Tos, loc. cit. no. 158, p. 7.—Mexico.

Cyrtophleba horrida, Giglio-Tos, loc. cit. no, 158, p. 6.—Mexico.

Degeeria mexicana, Giglio-Tos, loc. cit. no. 158, p. 7.—Mexico.

dicax, Giglio-Tos, loc. cit. no. 158, p. 7.—Mexico.

insecta, Giglio-Tos, loc. cit. no. 158, p. 7.—Mexico.

DIPTERA. 487

Degeeria cruralis, Giglio-Tos, loc. cit. no. 158, p. 7.—Mexico.

Dejeania aurea, Giglio-Tos, loc. cit. no. 158, p. 3—Mexico.

Gymnomma novum, Giglio-Tos, loc. cit. no. 158, p. 1.—Mexico.

Hystrichodexia mellea, Giglio-Tos, loc. cit. no. 147, p. 2.—Mexico.

aurea, Giglio-Tos, loc. cit. no. 147, p. 2.—Mexico.

Hystrisiphona bicolor, Giglio-Tos, loc. cit. no. 147, p. 2.—Mexico.

Masicera sesquiplex, Giglio-Tos, loc. cit. no. 158, p. 6.—Mexico.

— usta, Giglio-Tos, loc. cit. no. 158, p. 6.—Mexico.

glauca, Giglio-Tos, loc. cit. no. 158, p. 6.—Mexico.

Microphthalma sordida, Giglio-Tos, loc. cit. no. 147, p. 3—Mexico.

Mochlosoma anale, Giglio-Tos, loc. cit. no. 147, p. 1.—Mexico.

sericeum, Giglio-Tos, loc. cit. no. 147, p. 2.—Mexico.

Myioscotiptera cincta, Giglio-Tos, loc. cit. no. 147, p. 2.—Mexico.

Nemocheta incerta, Giglio-Tos, loc. cit. no. 158, p. 2.—Mexico.

dubia, Giglio-Tos, loc. cit. no. 158, p. 2.—Mexico.

cructa, Giglio-Tos, loc. cit. no. 158, p. 2.— Mexico.

pernox, Giglio-Tos, loc. cit. no. 158, p. 2.—Mexico.

jurinioides, Giglio-Tos, loc. cit. no. 158, p. 2.—Mexico.

aberrans, Giglio-Tos, loc. cit. no. 158, p. 2,—Mexico.

Plagia mexicana, Giglio-Tos, loc. cit. no. 158, p. 5.—Mexico.

dicta, Giglio-Tos, loc. cit. no. 158, p. 5.—Mexico.

Saundersia aurea, Giglio-Tos, loc. cit. no. 158, p. 3.—Mexico.

picea, Giglio-Tos, loc. cit. no. 158, p. 3.—Mexico.

Scotiptera cyanea, Giglio-Tos, loc. cit. no. 147, p. 2.—Mexico.

Thelairodes basalis, Giglio-Tos, loc. cit. no. 147, p. 3.—Mexico.

Tricholyga gracilens, Giglio-Tos, loc. cit. no. 158, p. 5.—Mexico.

insita, Giglio-Tos, loc. cit. no. 158, p. 5.—Mexico.

Chetogedia (Gediopsis) mexicana, Brauer & Bergenst. Denkschr. Akad. Wiss.

Wien, lviii. p. 336 (1892).—Mexico.

Paragedia hedemanni, Brauer & Bergenst. loc. cit. p. 350.—Mexico.

Prorhynchops bilimeki, Brauer & Bergenst. loc. cit. p. 364.—Mexico.

Plagiomima disparata, Brauer & Bergenst. loc. cit. p. 384.—Mexico.

Gediophana atra, Brauer & Bergenst. Denkschr. Akad. Wiss. Wien, lx. p. 113

(1894).—Mexico.

Metadoria mexicana, Brauer & Bergenst. loc. cit. pp. 117, 121.—Centr. America.

Wulpia aperta, Brauer & Bergenst. loc. cit. pp. 128, 188.—Mexico.

Exorista lagow, Towns. Ent. News, ii. p. 159 (1891).—Mexico.

Brachycoma chihuahuensis, Towns. Canad. Ent. xxiv. p. 165 (1892).—Mexico.,

Muscopteryx chetosula, Towns. loc. cit. p. 171.—Mexico.

488

SUPPLEMENT.

Trichopoda tegulata, Towns. Ann. & Mag. Nat. Hist. (6) xix. p. 29; xx. p. 270

(1897).—Mexico.

lanipes, Fabr., var. tropicalis, Towns. Ann. & Mag. Nat. Hist. (6) xx.

pp. 275, 278 (1897).—Mexico.

histrio, Walk., var. indivisa, Towns. loc. cit. pp. 274, 281.—Mexico.

(Pennapoda) phasiana, Towns. loc. cit. pp. 273, 282.—Mexico.

Hyalomyia ecitonis, Towns. loc. cit. p. 31 (1897).—Mexico.

violascens, Towns. loc. cit. p. 32.—Mexico.

Muscipa ACALYPTERZ.

Chetocelia palans, Giglio-Tos, Boll. Mus. Torino, viii. no. 158, p. 11 (1893).—

Mexico.

vergens, Giglio-Tos, Mem. Accad. Torino, (2) xlv. p. 51, tab. fig. 15 (1895).

—Mexico.

Chlorops wnicornis, Giglio-Tos, Boll. Mus. Torino, viii. no. 158, p. 14.—Mexico.

Drosophila excita, Giglio-Tos, loc. cit. no. 158, p. 14.—Mexico.

Sapromyza stata, Giglio-Tos, loc. cit. no. 158, p. 9.—Mexico.

plagosa, Giglio-Tos, loc. cit. no. 158, p. 9.—Mexico.

sonax, Giglio-Tos, loc. cit. no. 158, p. 9.—Mexico.

vinnula, Giglio-Tos, loc. cit. no. 158, p. 9.—Mexico.

urina, Giglio-Tos, loc. cit. no. 158, p. 9.—Mexico.

innuba, Giglio-Tos, loc. cit. no, 158, p. 9.—Mexico.

Euaresta latipennis, Towns. Zoe, iv. p. 13 (1893).—Mexico. .

Rhopalomera xanthops, Williston, Psyche, vii. p. 213 (1895).—Yucatan.

The following new genera of Muscide Calypteree have been based upon certain

species described by van der Wulp in this Volume :—

Bolomyia, for Mystacella violacea (antea, p. 53), Brauer & Bergenst. Denkschr.

Akad. Wiss. Wien, lviii. p. 347 (1892).

Thysanomyia, for Brachycoma fimbriata (antea, p. 97), Brauer & Bergenst. loc.

cit. p. 340.

Mesocheta, for Didyma commixta* (antea, p. 163), loc. cit. p. 341.

Paramesocheta, for Mystacella fuscicostalis (anted, p. 57), Brauer & Bergenst.

loc. cit. p. 341.

Dexiophana, for Prospherysa emulans (antea, p. 117), Brauer & Bergenst. loc.

cit. p. 374.

* Brauer and v. Bergenstamm incorrectly give the name as D. connewa.