Il.

ILI.

vale

Vil.

VIII.

CONTENTS.

RAR == MARCH 19a

The Lepidoptera of Seychelles and Aldabra, exclusive of the Orneadide and

Pterophoride, and of the Tortricina and Tineina. By J. C. F. Fryer, B.A.

(Cantab.), Fellow of Gonville and Caius College and Balfour Student in the

Umversity of Cambridge. (Communicated by Prof. J. StANLEY GARDINER, M.A.,

onS., Peles. (Plate i.) ~. : : : ‘ pages 1-28

Hymenoptera, Apoidea. By T. D. A. Cockrretn, Professor of Systematic

Zoology, University of Colorado. (Communicated by Prof. J. SrANLEY GARDINER,

MA., FRS., PLS.) (Text-figures 1-3.) . : , : 29-41

Hymenoptera, Diploptera. By Grorrrey Meapn-Watno, B.A. (Communicated

by Prof. J. StanLEY GARDINER, W.A., F.RS., PLS). ; 43-44

Hymenoptera, Proctotrupoidea. Von Prof. Dr. J. J. Kierrer (Bitsch). (Mitgeteilt

von Prof. J. STANLEY GaRDINER, W.A., F.RS., PLS.) (Tafeln 2, 3 und 5 Text-

figuren.) : : : ‘ : ‘ ‘ ; ; ‘ ; : 45-80

Diptera, Culicide. By Frepv. V. Turopatp, WA., FLELS., etc. (Communicated

by Prof. J. Stantey Garpiner, V.A., F.RS., FLAS.) (Plate 4 and Text-

figures 1-12.) .. : , : : : : : 81-94

Diptera, Stratiomyude. Von Dr. K. Kerrisz (Magyar Nemzeti Muzeum,

Budapest). (Mitgeteilt von Prof. J. Sranney Garpiner, WV.A., F.R.S., F.LS.)

(Text-figuren 1-4.) . 5 : : ; : : ; : 95-99

Diptera, Borboride from Seychelles. By James E. Contin, FES. (Communi-

cated by Prof. J. StantEyY GARDINER, W.A., F.RS., FDS. . : . 101-104

Diptera, Phoride from Seychelles. By James E. Coun, FES. (Communi-

cated by Prof. J. StantEY GarvINER, V.A., FLAS, F.LS.) (Plate 5.) 105-118

On the Mysidacea and Euphausiacea collected in the Indian Ocean during 1905.

By W. M. Tarrersaty, D.Sc., Keeper of the Manchester Museum. (Communicated

by Prof. J. Stantey Garpiner, V..A., F.RS., PLS.) (Plates 6 and 7.) 119-136

The Marine Polyzoa of the Indian Ocean, from H.M.S. Sealark. By Laura

Roscon THoRNELY. (Communicated by Prof. J. Stantey Garpiner, J.A.,

weh.S., F.L.S.) (Plate 8.) . : : : ‘ : . 137-157

XI.

XU.

XII.

XIV.

XV.

XV IE

XVII.

XVIII.

XIX.

XX.

XXI.

XXII.

PART IIJ.—SerprempBer, 1912.

Fourmis des Seychelles et des Aldabras, recues de M. Hueu Scorr. (Communi-

cated par Prof. J. StANLEY GARDINER, V.A., F.RS., F.L.S.) . pages 159-167

Hymenoptera, Ichneumonide. By Cuaupe Mortry, F.E.S., F.Z.8., etc. (Com-

municated by Prof. J. SrANLEY Garpiner, V.A., F.RS., PLS.) . 169-179

Diptera, Sciaride. Von Dr. GUNTHER ENDERLEIN, Sfettin. (Tafel 9, Fig.

1-10.) Mierzu ein Anhang (p. 192) von Prof. J. J. Kierrer. (Tafel 9, Fig.

11-14.) (Mitgeteit von Prof. J. Srantey Garpiner, V.A., F.R.S., PLS.)

181-194

Diptera, Tipulide. By F. W. Epwarps, B.A. (Cantab.), FES. (Contributed

by permission of the Trustees of the British Museum.) (Commumeated by

Prof. J. StaNLEY GaRDINER, VA., F.RS., PLS.) (Plates 10 and 11.) 195-214

Coleoptera, Lamellicornia and Adephaga. By Hucu Scorr, M.A. (Cantab.),

FLS., FES., Curator in Entomology in the University of Cambridge. (With

Plate 12 and 1 Text-figure. ) 5 ; : : , : : . 215-262

Orthoptera: Acrydiide, Phasgonuride, Grylliide. Par le Dr. Ianacto Bottvar.

(Communiqué par le Professeur J. StanLEY Garviner, M.d., FBS, F.LS.)

(Planches 18 et 14.) . : : : . 263-292

Orthoptera, Phasmide of the Seychelles. By Dr. Ianacto Bottvar and CHARLES

Ferrizre, B.Sc., University of Geneva. (Communicated by Prof. J. STANLEY

GarvinerR, V.A., F.RS., FL.S.) (With 2 Text-figures.) . : . 293-300

New Fishes from Aldabra and Assumption, collected by Mr J. (. F. Fryer.

By C. Tate Recan, M.A. (Communicated by Prof. J. STANLEY GARDINER,

MEAS CH OES.,, 12.0.8.) : : : ; . 801-302

PART IIJ.—DeEcempBer, 1912.

Diptera: Lonchaide, Sapromynde, Ephydride, Chloropide, Agromyxde. By

C. G. Lamp, W.A., B.Sc., Clare College, Cambridge. (Communicated by Prof.

J. Srantey Garprner, M.A., F.RS., F.L.S.) (Plates 15, 16 and Text-figures

(ee | NR

The Acarina of the Seychelles. By Crctn Warsurton, M.A. (Communicated

by Prof. J. Stanutey Garpiner, M.A., PRS, FLAS.) (Plates 17-19 and

4 Text-figures.) » : ; ; : ; . 349-360

Coleoptera, Coccinellide, Par le Dr. Stcarp. (Communiqué par M. le Pro-

fesseur J. Strantey Garpiner, M.A., F.RS., PLS.) . : . 361—866

Terrestrial Isopoda, particularly considered in Relation to the Distribution of

the Southern Indo-Pacific species. By the late Dr G. Buppr-Lunp, Copenhagen.

(Communicated by Prof, J. Srantey Garpriner, V.A., F.RS., PLS. ; Revised

by Rev. T. R. R. Stepsine, M.A., RS.) (Plates 20-22.) . 867-894

XXITI.

XXIV.

XV.

XXVI.

BOX IT.

XXVIII.

Index

fs |

Pelagic Actuwarian Larve. By Evira E. Bamrorp, Newnhain College,

Cambridge. (Communicated by Prof. J. Stantey GARpINER, M.A., FR.S.,

F.LS.) (Plates 28 and 24.) . : ; : . pages 395-406

On the Ferns of the Seychelles and the Aldabra Group. By Cari

CHRISTENSEN, M.Sc. (Copenhagen). (Communicated by Prof. J. STANLEY

GarRpDINER, VA., F.RS., F.LS.) (Plate 25.) : : ; . 407-422

PART IV.—Apriz, 1913.

Diptera, Psychodidae. By the Rev. A. E. Eaton, W.d., F.ELS. (Communi-

cated by Prof. J. StaNLEY GARDINER, M.A., F.RS., PLS.) (Plate 26.) 423-432

Ephemerda. By the Rev. A. E. Eatron, M.A., FES. (Communicated by

Prof. J. Sranney Garpiner, M.A., F.RS., F.L.S.) (With 1 Text-figure.)

433-454

Odonata. By Hersert Campion. (Communicated by Prof. J. STANLEY

GaRDINER, V.A., F.RS., FDS.) . : : : : ’ . 435-446

Les Caridines des Seychelles. Par le Protesseur Eugene L. Bouvier, FMS.

(Communiqué par le Protesseur J. STANLEY GARDINER, M.A., FRS., ELS.)

(Planches 27—29.) ; : : , . 447-472

473—496

No. I—THE LEPIDOPTERA OF SEYCHELLES AND ALDABRA, EXCLUSIVE

OF THE ORNEODIDA AND PTEROPHORIDA AND OF THE TOR-

TRICINA AND TINEINA.

By J. C. F. Fryer, B.A. (Cantab.), Fellow of Gonville and Caius College and Balfour

Student in the University of Cambridge.

(Plate 1.)

(Communicate By Pror. J. Stanney Garprner, M.A., F.R.S., F.LS.)

Read 15th June, 1911.

THIs paper contains a description of the Lepidoptera, exclusive of the Tortricide,

Tineidz, Orneodide, and Pterophoride*, of the Seychelles Archipelago, and of the coral

islands of Aldabra, Assumption, Cosmoledo and Astove, though the collections from the

three latter islands are too small to be considered representative. The collections from

the Seychelles were obtained very largely by Mr Hugh Scott, who spent eight months

(July 1908—March 1909) in the group and devoted the whole time to entomological

collecting. Mr H. P. Thomasset assisted very greatly with the Lepidoptera from Mahé,

while Professor Stanley Gardiner obtained a considerable number in the high jungle of

Silhouette. Ten days’ quarantine on Long Island, near Port Victoria, Mahé, gave me

an opportunity of observing the fauna of the low cultivated land, and I subsequently

spent three days in the high jungle of Silhouette, which was exceedingly rich in insects.

From the end of July to the middle of August I was engaged in investigating the

outlying sand cays, Bird and Dennis Islands, and obtained small collections on each.

About five months (September 1908—January 1909) were spent on the coral atoll

of Aldabra, 250 miles N.N.W. of Cape Amber, Madagascar, and a few days on each of the

neighbouring islands, during which period the greater part of the collection from that

region was obtained, though I am also much indebted to Mr Dupont for a collection

from Assumption (1910), and to Mr Thomasset for a collection from Aldabra made in

the spring of 1907. On my return from Aldabra, a fortnight spent with Mr Thomasset

at Cascade, almost on the edge of the indigenous jungle, gave me further opportunity of

obtaining some acquaintance with the Seychelles insect fauna.

Mr Scott spent August and September in the high jungle of Silhouette, and the

remainder of the period on Mahé, while he paid short visits in December to Praslin,

Félicité and Marie Anne. His collections, by far the largest ever made in the archipelago,

* Trans. Linn. Soc., ser. 2, Zool. vol. xiii. (1910) pp. 397—404 (Orneodide and Pterophoride) and

vol. xiv. (1911) pp. 263—307 (Tortricina and Tineina). See also Lepidoptera by T. Bainbrigge Fletcher,

id. vol. xiii. (1910) pp. 265—324.

SECOND SERIES—ZOOLOGY, VOL, XV. 1

2 PERCY SLADEN TRUST EXPEDITION

may be considered as thoroughly representative of its Lepidopterous fauna, though from

their general facies I should judge there is yet more of great interest to be obtained

from the small patches of primitive jungle that still remain—especially on Silhouette.

It is of course impossible, even for a collector of the greatest ability, to exhaustively work

any single order of insects in a locality when engaged in making collections covering all

orders. The deductions of importance, which can be made from such collections as I

am about to describe, relate in the main to questions of geographical distribution ; in

the present paper we have two entirely distinct problems to consider: (1) that of the

Seychelles Archipelago ; (2) that of Aldabra and the neighbouring islands.

(1) The Seychelles, with the exception of Bird and Dennis Islands, consist of

granitic rocks, with a maximum elevation of 3000 ft. The islands were formerly clothed

with a jungle of plants very largely peculiar to the archipelago, though cultivation has

now reduced it to small areas left on the higher peaks. Professor Stanley Gardiner,

both for geographical and biological reasons, considers that the Seychelles form the last

remaining portion of a land-bridge which connected India and Madagascar between

carboniferous and tertiary times, while he also considers that formerly the whole

Seychelles bank (2000 square miles) was capped with land which has been cut down

by sea abrasion to the few small islands which at present exist: the lepidopterous fauna,

therefore, must be considered in connection with this view.

(2) The atoll of Aldabra and also the neighbouring islands are shown by their

structure to have risen from the sea and to have never been connected with any other

land: the entire insect fauna, therefore, must have arrived by sea, being in the main

derived from forms driven by wind from the neighbouring lands. Aldabra is quite

uncultivated, and much of it had not been explored before my visit, and therefore

transference by human agency can be almost neglected. It is covered with a vegetation

derived entirely from Madagascar—a most important fact, as insects arriving from that

region will find in many cases their original food plant.

Considering the Seychelles problem first, a glance at a map of the Indian Ocean

will show that to the east and north of the archipelago is a chain of coral islands partly

bridging the gap between it and India: this bridge must have been of great assistance

in the distribution of those Indian and widely occurring forms, which can exist on the

limited number of food plants provided by a coral island. To the south-west are the

coral islands of the Amirantes, but there are no other “stepping stones” between the

Seychelles and Africa. To the south as far as Aldabra are a few small coral rocks, but

these are not of a nature to assist largely in the distribution of continental forms.

The winds in the Seychelles region consist of the S.E. Trades from May to

September and of the N.W. Monsoon, usually light north-westerly breezes, with

occasional squalls, from October to April. Of these two winds the latter are probably

the most useful in distribution, as the 8.E. Trades, though stronger, cross a large tract

of open sea,

Currents cannot be of very great assistance to the larger forms which we are

considering, though they may have distributed wood-feeding Tortricids and Tineids

(vide E, Meyrick on the Tortricina and Tineina of the expedition). The Seychelles

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. 3

are well cultivated, and doubtless human agency has accounted for the arrival of such

species as Pyralis manihotalis.

Turning to the Seychelles species, we find a total of 143 species, to which must be

added 111 species of ‘‘ Micro” and 6 species of “ Plume”; of these, in my sections there

are 30 peculiar species, while Mr Meyrick finds 90, and Mr Fletcher 3.

Confining myself to my own groups, it is first noticeable that, with the exception

of the peculiar species, the various forms are in the main widely distributed, though there

is a slight preponderance of African forms. It is not possible to make deductions of value

from them, as they are evidently being carried over a large area and can colonise any

favourable spot. Even if they belong to a type usually found on continental land it

would be rash to deduce that the Seychelles are also continental, as it is quite possible

that such species are really being carried daily by the winds to any small islands, but

do not as a rule find the continental type of vegetation they require. The peculiar species,

however, are of greater value, and it may be said that the majority are very distinct and

well separated from their nearest allies ; they tend to show that the Seychelles were once

much larger, while in many cases they belong to continental groups which do not often

cross large areas of sea.

A comparison with the fauna of some island which has undoubtedly never had a

continental connection, which is not coralline and which is very isolated, would be

interesting, but I know of no island which is convenient for comparison.

The problem of the Aldabra region is more simple than that of Seychelles; there are

66 species, of which 7 are peculiar, and with the exception of the latter all belong to

Malagasy or African forms. There are 9 species of micro-lepidoptera, all peculiar, but it

is most probable that, when the fauna of Madagascar is better known, Aldabra will be

found to contain no species which have not close allies elsewhere.

There is thus a great contrast between the Aldabra region and Seychelles, a contrast

which sufficiently speaks for itself.

Further deductions could be made from both the fauna of the Seychelles and that

of Aldabra, but in problems of geographical distribution, when arguing from one group

of animals, it is unwise to carry conclusions too far, and I next turn to the systematic

account of the species, though a word may first be said as to previous collections from the

two localities.

Collections were obtained in the Seychelles by M. Joannis* (from M. Philibert), by

Dr Holland (from Dr Abbott), while the latter gentleman also described a small collection

from Aldabra. Aurivillius recorded the species obtained on Aldabra by Voeltzkow, while

Sir G. Hampson described the collections obtained in the Indian Ocean by the

“Valhalla.” The Lepidopterous fauna of the Seychelles, however, was but little known

until H.M.S, “Sealark” visited them in November, 1905. The collection of Lepidoptera

then obtained contained 10 new species, as well as numerous additions to the Seychelles

list. A full account by T. Bainbrigge Fletcher, R.N., will be found in Trans. Linn. Soc.,

ser. 2, Zool., vol. xiii. p. 265, 1910.

* Fletcher, Trans. Linn. Soc., ser. 2, Zool., vol. xiii. (1910) p. 322 gives an excellent bibliography

with full references.

1—2

4 PERCY SLADEN TRUST EXPEDITION

The present expedition obtained 37 species not previously recorded in the Seychelles,

of which 17 are new to science ; 14 species previously recorded were not found™.

On Aldabra some 40 species were added to previous lists, of which 4 are new*.

In conclusion, I must express my indebtedness to Mr Ed. Meyrick for taking over

the Tortricina and Tineina and to Sir George Hampson for much kind assistance when

consulting the national collection.

Norse. Mr H. P. Thomasset has kindly offered to obtain for me a further collection

from the Seychelles. I have therefore refrained from describing poor specimens in the

expectation of better material. Also Mr R. P. Dupont, who has already been most kind

in sending me specimens from Assumption, is again visiting this island and, it is

hoped, Astove. Therefore it is proposed to issue a supplement to this paper, bringing

the Seychelles lists up to date and adding to those of Aldabra and the neighbouring

islands.

Arctiade.

1. Celama squalida (Staud.).

Nola squalida Staud., Berl. Ent. Zeit., xiv, p. 102 (1870).

Celama squalida Hamps., Cat. Lep. Phal., ui, p. 24.

Ten ? apparently referable to this species were obtained on Aldabra; seven differ

from the type in that the antemedial line is more acutely angled and more strongly

marked. These specimens may ultimately be found to belong to a distinct species, but

in the absence of the ¢ I hesitate to describe them as new.

Aldabra, 10 ¢. Spain, Syria, Madagascar, India, China f.

2. Celama sp. ?

A single fragmentary and worn ¢ of this genus was obtained in Silhouette, but its

species is quite indeterminable.

3. Ilema contorta, n. sp. (Plate 1, fig. 1, ¢)

g. Antenne, with bristles and cilia; head thorax patagia greyish fuscous; palpi

and sometimes collar darker; abdomen light fuscous. Fore wing with a large fold

extending forwards from below cell near vem 1, the apex of the fold on the underside

of wing nearly reaching the subcostal vein; the colour light fuscous with the costal area

to fold more or less suffused with dark purplish fuscous. Hind wing yellow, somewhat

suffused with fuscous. Hapanse 30 mm.

This species must serve as the type of a new section of the genus Jlema, near

section 11. B in the Cat. Lep. Phal., vol. i, p. 132.

Seychelles: Mahé, Cascade, 800 ft. ; x1. 1908—1. 1909; 6 2.

4. Ilema sp. ?

A further species of J/ema remains to be determined. It is probably new, but in the

expectation of better material I pass it over for the present.

* Excluding “ micros.”

+ The reference to each species is terminated by a summary of its geographical distribution so far as

at present recorded.

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. 5

5. lema decreta (Butl.).

Lithosia decreta Butl., Trans. Ent. Soc. London, 1877, p. 351 ; Kirby, Cat. Het. p. 325.

Tlema decreta Hamps., Cat. Lep. Phal., 11, p. 176.

Aldabra, 31 specimens, ¢ and 9. Borneo, Australia.

MauHeEnstA, nov. gen. (Plate 1, figs. 2 and 8).

Proboscis fully developed. Palpi slender, upturned, reaching vertex of head.

Antenne in ¢@ ciliated. Tibial spurs moderate. Fore wing with the costa evenly

arched ; vein 2 from just beyond middle of cell; 3 and 4 stalked from lower angle of

cell; 5 absent; 6 and 7 stalked from near upper angle of cell; 8 and 9 absent or

coincident with 10; 10 from upper angle; 11 from after middle of cell approaching

closely the distal end of 12. Hind wing with vein 2 from cell at ~; veins 3 and 4,

coincident, from lower angle; vein 5 from middle of discocellulars; veins 6 and 7

coincident from upper angle ; vein 8 from cell at 4. This genus is perhaps a development

of Siccia of Section m1. (Hampson, Cat. Lep. Phal., ii, p. 392), which it resembles in the

structure of the antennee and palpi. Type M. seychellarum.

6. Mahensia seychellarum, n. sp. (Plate 1, fig. 2, 2; fig. 3, neuration of wings).

g. Head and thorax whitish. Abdomen dark grey; terminal segment with a small

tuft of fuscous hairs. Fore wing white, the costal edge at base grey; a blackish patch

on costa at 4, reaching cell; another at %, larger, subtriangular, outwardly curved and

reaching vein 4; blackish suffusions near apex, near centre of outer margin and on inner

margin just before outer angle, the two former not reaching margin of wing ; sometimes

a black angular dash near inner angle; a black spot on discocellulars ; another at point

of origin of vein 2; a third at base of wing. Underside grey with a patch of reddish

scales (androconia) covering distal end of cell. Hind wing grey, with a patch of reddish

androconia over distal end of cell. Hapanse 16 mm.

Seychelles: Silhouette, 1000 ft., 1x. 1908, 2 ¢.

7. Philenora subfusca, n. sp. (Plate 1, fig. 4, 2).

g. Head, thorax, abdomen and wings dark red brown, with a purple tinge ;

antennz, legs, anal tuft, lighter. Fore wing with a very indistinct dark antemedial

line ; a second, postmedial, just beyond discocellulars; a black somewhat elongate spot

in cell and a second, circular in shape, on discocellulars, the intervening area being light

fuscous; sometimes a light fuscous patch between the ante and postmedial lines near

inner margin ; an indistinct light area at apex and at outer angle, representing perhaps

the edge of a subterminal line; traces of a series of marginal spots. Hind wing dark

fuscous, with a purple tinge. Hapanse 19 mm.

This species appears to come in Section u. B of the genus (Cat. Lep. Phal., ii, p. 509)

and is abundantly distinct from other known species.

Seychelles : Silhouette, 1000 ft. viit., 1x. 1908, 4 2.

8. Utetheisa elata (Fabr.), ab. diva (Mab.); Hamps., Cat. Lep. Phal., iii, p. 480.

Seychelles: thirteen specimens from Mahé and Silhouette, 800—1000 ft., all of

ab. diva. Fletcher obtained two specimens of the type on Mahé.

6 PERCY SLADEN TRUST EXPEDITION

Assumption, | ? of type form, R. P. Dupont, 1910. Also Madagascar, Mauritius,

Comoros.

9. Utetheisa pulchella (Linn.); Hamps., Cat. Lep. Phal., iii, p. 483.

Fletcher obtained this species on St Anne [., but it is apparently unrepresented in

the present collection. Two ? from Aldabra may be this species, but are more probably

U. pulchelloides.

Throughout the old world, temperate, subtropical and tropical regions.

10. Utetheisa pulchelloides Hamps., Ann. Mag. Nat. Hist., ser. 7, xix, 1907, p. 239.

Seychelles: Silhouette, 2 specimens; Bird I., 8 specimens; a ? from Silhouette has the

red markings replaced by yellow. Aldabra, 2 specimens. Recorded from Formosa, New

Guinea, North Australia, Solomon Islands.

11. Utetheisa lactea, subsp. aldabrensis Fletcher, Trans. Linn. Soe. London, ser. 2,

Zool., vol. xii, p. 268.

A long series from Aldabra, all of which are more or less strongly marked with red

and black ; examples from Assumption resemble those from Aldabra. A single specimen

from Cosmoledo resembles subsp. aldabrensis, except that the fore wings are suffused with

light fuscous.

Farquhar. Cosmoledo. Assumption. Aldabra. Providence. Glorioso. Amirantes.

12. Rhodogastria aldabrensis, n. sp. (Plate 1, fig. 5, ).

g. Head and thorax ochreous ; palpi ochreous, tinged with crimson above, each joint

with a terminal black lateral spot. Antennze fuscous, basal joint crimson below. Vertex

of head with black spot; tegul, shoulders, patagia pro- and meta-thorax with paired

black spots, which may be obsolete. Legs and abdomen cream coloured, more or less

tinged with crimson above. Fore wing light fuscous or ochreous ; two black points at

base; a large discal semihyaline patch in and below end of cell and in the interspaces

beyond it, extending to near outer margin, between veins 2 and 4; a smoky black apical

suffusion extending from costa near junction of veins 6 and 7 to the outer margin between

veins 3 and 4. Hind wing hyaline, with a narrow cream-coloured border along outer margin.

? as g, but with less crimson on abdomen and legs. Hapanse: ¢ 36—42 mm.; ? 42 mm.

This species is most nearly allied to R. astreas var. madagascarensis Bois, from

which it may be easily distinguished by the entire absence of a discoidal fascia and by

the absence of black spots on the abdomen. It is a smaller and more uniformly

ochreous insect.

Aldabra, 1 g. Assumption, 2 3,1 2.

Noctuide.

13. Chloridea armigera (Hiibn.); Hamps., Cat. Lep. Phal., iv, p. 45.

Assumption, 6 specimens. World-wide.

14. Chloridea assulta (Guen.) ; Hamps., Cat. Lep. Phal., iv, p. 47.

Assumption. Hampson (Ann. Mag. Nat. Hist., ser. 8, vol. i, 1908, p. 481), records

this species as being taken by the “ Valhalla.” All my specimens seem referable to the

same species. W. Africa, India, Ceylon, China, Australia.

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. r

15. Euzxoa microtica Hamps., Ann. Mag. Nat. Hist. ser. 8, i, 1908, p. 482.

This species was described from a single 3 obtained by the “ Valhalla.” Mr Dupont

has obtained a ¢ and @ of this species; the latter is in somewhat poor condition, but as it

differs in several particulars from the ¢ I append a short general description.

Head, thorax and abdomen greyish fuscous. Fore wing grey, darker (lead-coloured)

along the outer margin and from the median vein to the inner margin; a patch of fuscous

scales near inner angle below cell; traces of sub-basal, antemedial and postmedial lines,

the latter defined by a series of black dots ; orbicular grey, outlined with fuscous ;

reniform outlined with brown and filled with lead-coloured scales, which are continuous

with those clothing the space between the cell and iner margin ; claviform grey,

outlined with black ; traces of a submarginal line from just below apex to outer margin

at vein 2; cilia fuscous. Hind wing whitish, darker toward apex and along outer

margin; cilia whitish. Hxpanse: 2, 28 mm.

Assumption, 1 2, 1 ¢ (Dupont).

16. Cirphis loreyi (Dup.); Hamps., Cat. Lep. Phal., v, p. 492.

Aldabra, 1 ¢. Europe, Africa, and Oriental region.

17. Cirphis leucosticha Hamps., Cat. Lep. Phal., v, p. 541.

Seychelles: Praslin, 1 ? (Fletcher) ; the present collection contains no representative.

British E. Africa, Natal, Mauritius, Madagascar.

18. Hriopus maillardi Guen., Maillard’s Réunion, Lép., p. 39 (1862).

Seychelles: Mahé, 1 specimen; Round Island, Mahé (Fletcher) ; Silhouette, 6 speci-

mens from “high jungle, 2000 ft.” ; Frigate (Fletcher). African and Oriental regions.

19. EHriopus yerburw Butl., Proc. Zool. Soc. London, 1884, p. 496.

Eriopus yerburi Hamps., Cat. Lep. Phal., vii, p. 560.

Seychelles ; Silhouette, 4 specimens, 1000 ft. Egypt, India, Ceylon.

20. Spodoptera mauritia (Boisd.) ; Hamps., Cat. Lep. Phal., vii, p. 256.

Seychelles : Mahé, Cascade, 800 ft., 2 specimens. African and Oriental regions.

21. Spodoptera abyssinia Guen., Noct., i, p. 154 (1852).

Seychelles: Mahé, Cascade, 800 ft., 30 specimens. African and Oriental regions.

22. Prodenia littoralis (Boisd.)*.

Hadena littoralis Boisd., Faun. Ent. Madag., p. 91, pl. 13, p. 8 (1833).

Seychelles : Mahé, low country, 2 specimens. African and Oriental regions.

23. Perigea capensis (Guen.); Hamps., Cat. Lep. Phal., vii, p. 332, pl. 116, fig. 20.

Seychelles: Mahé (Fletcher; no specimens in present collection). African and

Oriental regions.

24. Chasminia sericea Hamps., Ill. Het. Brit. Mus., ix, p. 92.

Seychelles: Mahé, 1 specimen (Fletcher). Praslin. Islands of the Indian and

Pacific Oceans; Burma.

* [Hampson identifies this species with Noctwa litura Fabr., Syst., Ent., p. 601. J. 8S. G. }.

8 PERCY SLADEN TRUST EXPEDITION

25. Amyna octo (Guen.); Hamps., Cat. Lep. Phal., x, p. 468.

Seychelles: Mahé; Praslin; Bird; Dennis. Aldabra, 2 specimens. Universal in

tropical regions.

26. Eutelia inextricata Moore, Lep. Atk., p. 147 (1882).

Seychelles: Mahé (Fletcher; not in present collection). India, Assam, Ceylon,

China, Japan.

27. Stictoptera antemarginata (Saalm.), Lep. Madag., p. 492 (1884).

An ochreous brown form, with the costa and inner margin dark; orbicular lighter

brown ; reniform ochreous brown, outlined with darker and preceded by a light spot ;

apical dash, somewhat suffused with fuscous.

I should have considered my specimens to be a form of the common S. cuculliordes,

but Sir G. Hampson kindly examined them and informed me that they are referable to

the above species.

Seychelles: Félicité, 2 ¢. Madagascar.

28. Stictoptera pacilosoma (Saalm.), Lep. Madag., p. 491.

Fletcher recorded this species from Mahé (“in bad condition,” 1 specimen) ; it is not

in the present collection.

Seychelles? Madagascar.

29. Maceda mansueta Walk., Cat., xi, p. 1141.

Seychelles : Mahé, low country, 2 ?. Ceylon, Andamans, Borneo, N. Australia.

30. Cletthara valida Walk., Cat. xxvii, p. 101.

Seychelles: Mahé, Cascade, 800 ft., 2 9. Ceylon, Borneo.

31. Homoptera glaucinans (Guen.), Noct., iii, p. 6.

Aldabra, 1 9. African and Oriental regions.

32. Chalciope hyppasia (Cram.), Pap. Exot., iii, p. 99, pl. 250 f. & (1779).

Seychelles: Mahé; Silhouette; Praslin; St Anne; Frigate. African and Oriental

regions.

33. Grammodes geometrica (Fabr.), Syst. Ent., p. 599; Hamps., Moths Ind., ii, p. 531.

Assumption, 1 ¢ (Dupont, 1910). African and Oriental regions.

34. Grammodes stolida (Fabr.), Syst. Ent., p. 599; Hamps., Moths Ind., ii, p. 532.

Aldabra, 1 ¢. Assumption, 2 3. African region, Madagascar, India, Burma.

35. Grammodes delta Boisd., Faun. Ent. Madag., p. 105 (1833).

Aldabra, 1 3. Africa (S. and E.), Madagascar, Mauritius.

36. Renigia undata (Fabr.), Syst. Ent., p. 600 (1775).

Seychelles; common on the lower land of all the islands. African and Oriental

regions.

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. 9

37. Remigia repanda (Fabr.), Ent. Syst., 11 (2), p. 49 (1794).

Seychelles; Mahé; Silhouette; Praslin (Fletcher); Félicité. African and oriental

regions, Central America.

38. Ophiusa mercatoria (Fabr.), Ent. Syst., ili (2), p. 62 (1794).

Aldabra: two specimens obtained at the flowers of Ceriops candolleana ; they are

small in size (expanse 50 mm.) and seem to represent the form vwiolaceofascia of

Saalmiiller. Assumption, 1 ¢. East Africa, Madagascar, India, Ceylon, Java.

39. Ophiusa algira (Linn.), Syst. Nat. ed. 12, i, p. 836 (1766); Hamps., Moths

Ind., ii, p. 500.

Seychelles: Mahé, 1 ¢, 1 9. Aldabra, 3 ¢, 2 ?; smaller than the type and tinged

with fuscous. Old world, tropical and sub-tropical regions.

- 40. Ophiusa angularis (Boisd.), Faun. Ent. Madag., p. 103.

Seychelles: Mahé, 2 ¢. East and South Africa, Madagascar, Mauritius.

41. Ophiusa tirhaca (Cram.), Pap. Exot., ui, p. 116, pl. 172, f. E (1777).

Assumption, 1 2 (Dupont). Europe (South), Africa, India, China.

42. Ophiusa melicerta (Drury), Ill. Exot. Ins., i, 46, t. 23, f. 1; Hamps., Moths

Ind., ii, p. 494.

Seychelles: Mahé, 1 ¢ and 1 3. Assumption, several specimens (Dupont, 1910).

The ¢ from Mahé seems referable to the form (sp.?) catella, while the twé ? resemble

Saalmiiller’s figure of Achaea adipodina Saalm. (Lep. Madag., T. vit. fig. 132). African,

Oriental and Australasian regions.

43. Plusia chalcytes Esper., Schmett. f. 141, f. 3 (1789).

Seychelles: Mahé; Sihouette; Marie Anne; Bird. Aldabra. Tropical regions

throughout the world.

44. Plusia signata (Fabr.), Ent. Syst., iii (2), p. 81; Hamps., Moths Ind., ii, p. 568.

Seychelles: Mahé; Joannis records this species but no further specimens have been

obtained. Africa, Madagascar, India, Ceylon, China, ete.

45. Plusia limbirena Guen., Noct., ii, p. 350.

Seychelles; Mahé, 1 ¢. Africa, Madagascar, Mauritius, India.

46. Cédebasis ovipennis Hamps., Ann. S. African Mus., ii, p. 352.

Aldabra, 1 ¢; previously only known from a ¢ and ? type in Coll. Druce. Africa

(Delagoa Bay).

47. Catephia olivescens (Guen.), Noct., i, p. 48.

Seychelles: Mahé, 1 ?. African, Oriental and Australasian regions.

48. Fodina aldabrana, n. sp. (Plate 1, fig. 6, f.)

$¢. Head and thorax chestnut brown; vertex of head and palpi light fuscous; the

scales on tegule, patagia and mesothorax tipped with yellow. Fore wing vinous brown

SECOND SERIES—ZOOLOGY, VOL. XV. 2

10 PERCY SLADEN TRUST EXPEDITION

with black and grey scales on costa and along inner margin near outer angle; an oblique

slightly ex-curved ochreous line from near base to middle of cell; a second ochreous line

from point of origin of vein 6 incurved to the middle of vein 2, then sharply angulated,

narrower, and incurved to inner margin at two-thirds; the space between these lines

suffused with dark brown, forming a transverse fascia extending from inner margin to near

subcostal vein; an irregular dark brown suffusion near outer margin from apex to vein 3,

followed by faint grey and black marginal lines from below apex to near outer angle ; cilia

grey irrorated with black. Hind wing greyish fuscous with an irregular white median

line; cilia grey. Hapanse 22 mm.

This species is most nearly allied to the African forms comprising F. pentagonalis,

and others (especially to an undescribed species in the British Museum from Sierra Leone

(Dudgeon)).

Aldabra, 2:2, 1 9.

49. Thermesia rubricans (Boisd.), Faun. Ent. Madag., p. 106.

Seychelles: Mahé; Silhouette; Praslin; St Anne; Frigate (1 ¢ in present

collection). Africa, Madagascar, India, N. Australasia.

50. Hypospila thermesiana Guen., Maillard’s Réunion, Lép., p. 53.

Hypospila bolinoides Guen., Noct., i., p. 388.

Seychelles: Mahé(?); Feélicité, 3 specimens. Also Réunion.

51. Dragana pansalis Walk., Cat., xvi, p. 200.

Seychelles: Mahé; Silhouette; Praslin; Félicité, numerous specimens. Africa,

India, Ceylon, Andamans, Nicobars, ete.

52. Tarache malgassica Mab., Bull. Soc. Ent. Belg., xxv, 1881, p. 1x; Saalm., Lep.

Madag., p. 330.

Aldabra, 1g. Astove, 1g. Assumption, 13, 29. Madagascar.

53. Tarache rachastris Hamps., Ann. Mag. Nat. Hist., ser. 8, i, p. 483.

Aldabra, 4 3.

54. Cosmophala erosa (Hiibn.), Zutr. Samml. Exot. Schmett., ii, p. 19, figs. 287, 288.

Seychelles: Mahé; Silhouette, 5 specimens. Throughout tropical regions.

55. Hublemma costimacula Saalm., Lep. Madag., p. 365; Hamps., Cat. Lep. Phal.,

x, p. 180.

Eublemma plagiopera Hamps., Ann. 8. African Mus., ii, p. 420.

Aldabra, 12. Assumption, 12. Madagascar.

56. Oruza rupestre, n. sp. (Plate 1, fig. 7, 3).

22. Head brown; frontal tuft tinged with pink; palpi dark brown. Thorax and

patagia clothed with both hair and scales, light ochreous irrorated with black. Abdomen

ochreous irrorated with black scales which may form definite dorsal segmental spots and

which are always in preponderance on the basal portion of the last segment, giving it a

black appearance ; anal tuft ochreous. Wings light ochreous, clothed basally with both

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. 11

hairs and scales; fore wing with oblique waved pinkish antemedial, postmedial and

submarginal lines, the first indistinct ; a black dot on disc; three on costa towards apex

and a series on submarginal line, the first bemg near apex, the second between veins 5

and 6 and the remainder, variable in number, situate between veins 1 and 3; outer

margin and cilia somewhat suffused with pink; a black dentate marginal dot in the

interspace between each vein. Hind wing as fore wing except that the antemedial line is

even more indistinct and the postmedial line is marked on inner margin by a black dot.

Expanse 28—30 mm.

Seychelles: Mahé, 1000 ft. ¢ and ?; Silhouette, 1500 ft., 1 f.

57. Areopterum minmale, n. sp.

@. Head and thorax white; a ring of black scales surrounding eyes. Palpi

upturned, slender, hardly reaching vertex ; the second and third joints black tipped with

yellow ; antenne nearly simple, greyish ochreous: fore legs greyish black ; mid and hind

legs white ; abdomen greyish irrorated with black and yellow posteriorly. Fore wing

with ground colour white ; a sharply angulated sub-basal line meeting on costa a yellow

bordered black dash ; trace of a median grey fascia, most distinct on dise and continued

on costa as a distinct yellow-edged black dash, which is often double ; a black spot in cell

on the inner edge of the median fascia ; traces of a waved submarginal line ; outer margin

suffused with smoky black; a marginal series of brown points and from apex to second

costal spot a series of brown dashes ; cilia grey irrorated with black. Hind wing as fore

wing but without costal spots; the median fascia more strongly marked ; the terminal

suffusion darker and bordered on its inner edge with yellowish fuscous ; sometimes some

yellowish scales in fascia.

g. The examples of the ¢ are in rather poor condition : they appear to resemble the

? exactly except in being somewhat lighter in colour. Haxpanse 10—11 mm.

This species is closely allied to A. goniophora Hamps. and A. griseata Hamps. from

which it differs in having the ground colour of the fore wing white, the markings more

distinct, the costal spots outlined with yellow and in the hind wing the median area of

the wing somewhat suffused with ochreous.

Seychelles: Mahé, low country to 1000 ft., 29, 29; Félicité, 2 2.

58. Bryophilopsis rederi (Standf.).

Bryophila rederi Standf., Romanoff Mem., vi, p. 665, pl. 25, fig. 4; Staud., Cat.

Lep. Pal., p. 167.

Aldabra. 3 worn specimens are perhaps referable to the above species, though they

much resemble Asinchrona nesta (Fletcher), a species which appears to me to be very

closely allied to B. rederi. Armenia, Syria, Mesopotamia.

59. Earias insulana Boisd., Faun. Ent. Madag., p. 121, pl. 16, fig. 9.

Seychelles: Bird Island, 1 ¢, 29, July 1908. This species was probably introduced

with the cotton plant (Gossypium) which is not uncommon. Throughout Ethiopian and

Oriental regions to Siam.

60. Ophideres materna (Linn.), Syst. Nat. ed. 10, i, 2, p. 840.

A single specimen flew on board the schooner Charlotte, when some 40 miles S.W. of

9__9

12 PERCY SLADEN TRUST EXPEDITION

Platte Island, with a light wind from the N.W. after 10 days’ calm. India, Ceylon,

Burma, Andamans, Java.

61. Magulaba imparata Walk., Cat., p. xv, 1777 (1858); Hamps., Moths Ind.,

ili, p. 26.

Magulaba mestalis Walk., Cat., xxxiv, 1126 (1865).

Seychelles: Mahé, numerous; Praslin; St Anne. Africa, India, Ceylon, Borneo,

Korea, Japan.

62. Simplicia inareolalis, n. sp. (Plate 1, fig. 8, neuration of wings).

In markings and general appearance this species exactly resembles S. inflexalis Guen.

In a series of 18 specimens however there is no trace of an areole and I therefore describe

it as new, though it is doubtless a local development of the widely spread S. inflexalis.

Seychelles : Mahé: Silhouette.

63. Nodaria externalis Guen., Delt. et Pyr., p. 64, 1854.

Aldabra, 4 3,119. S. Africa, Mauritius, India, Ceylon, Japan.

64. Hydrillodes perplexalis, n. sp. (Plate 1, fig. 9, palpus.)

¢. Head, thorax and palpi dull fuscous brown: fore wing fuscous brown with grey

tinge ; an indistinct waved sub-basal line; a median black spot in cell; a grey brown

waved postmedial line bordered externally by a narrow lighter line. Distal third of wing

suffused with dark grey brown; submarginal line represented by a series of lighter dots.

Hind wing grey brown ; an indistinct semilunar discal dot and medial line.

?. Marked as in f¢ but the whole insect is suffused with a red brown instead of

a grey brown. Hxpanse 28 mm.

Structurally this species falls in Section II. A of Hampson’s classification of the genus

in “ Fauna of British India” but in markings it exactly resembles H. repugnalis ; on this

account a short description only is necessary.

Seychelles, 33, 62.

65. Hydrillodes sp.?

Two very fragmentary specimens of a Hydrillodes were obtained in Aldabra, which

are very small (expanse 14 mm.) and structurally require a new section near sect. II. A.

They are almost certainly new but from the material in my possession it is quite impossible

to describe them.

66. Progona patronalis (Walk.), Cat., xix, p. 873.

7 specimens ; the discal dash varies from chestnut to black.

Seychelles; Mahé. India and Ceylon to Australia.

67. Rwula dimorpha, n. sp.’ (Plate 1, fig. 10, 3.)

g. Head, palpi, thorax, abdomen, pale ochreous ; antennze darker. Fore wing pale

ochreous, more or less irrorated with brown scales which are less prevalent over the basal

area ; a Short brown basal dash on costa reaching cell; a brown antemedial line or fascia

from near inner angle to costa near middle, usually interrupted or much narrowed before

costa, but always expanded again on costa to form a short brown dash; a black dot at

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. 13

each angle of cell, and a third near point of origin of vein 2; sometimes a fourth just

beyond cell between veins 6 and 7 ; a dark apical suffusion, continued obliquely to mner

margin as a post-medial line by two indistinct parallel brown lines or series of suffusions ;

four brown dashes on costa near apex ; traces of a waved submarginal line ; outer margin

and cilia ochreous more or less irrorated with brown scales. Hind wing greyish ochreous

suffused with grey brown near outer margin and on veins 1 to 4; cilia ochreous, darker

near termination of veins.

?. Differs from ¢ in being wholly suffused with dark fuscous with the exception of

the costa which is ochreous interrupted towards apex by brown dashes and also by the

antemedial line and basal dash. Hind wing lead-coloured ; cilia ochreous, interrupted by

fuscous bars near termination of veins. Hxpanse, 18 mm.

The mid-tibia in both sexes is somewhat expanded and both mid- and hind-tibiz are

moderately hairy, the feature being most marked in the ?. The species is quite distinct

and comes perhaps in Hampson’s Sect. III of the genus (Fauna of Brit. Ind., Moths,

vol. ii, p. 335).

Seychelles: Mahé, 1000 ft.; Silhouette 1500 ft.; 10 3, 1.

68. Chusaris oculalis (Moore), Proc. Zool. Soc. London, 1877, p. 614.

Seychelles: Mahé ; Silhouette; 3 worn specimens probably this species. W. Africa

(Accra), Assam, Andamans.

69. Chusaris novatusalis (Walk.), Cat., xix, p. 854.

Seychelles ; Silhouette, 1000 ft. I refer two specimens not in the best of condition

to this species, though they differ from the specimens in the British Museum in being

more strongly marked. Ceylon.

70. Chusaris ngerrimalis, n. sp. (Plate 1, fig. 11, 2).

3. Antenne annulated, with fascicles of cilia. Palpi with second joint porrect, the

third being somewhat upturned and over two-thirds the length of second ; colour uniform

smoky black ; fore wing with a black discal dot ; traces of an oblique lighter line passing

from costa through discal dot to inner margin ; traces of a lighter submarginal line.

@ with antennz nearly simple ; fore wing with markings somewhat more distinct, the

submarginal line being distinctly angulated opposite discal dot; cilia with lighter bars

opposite terminations of veins. (Haxpanse 12—14 mm.)

This species is abundantly distinct and comes in Hampson’s Sect. I. of the genus in

Fauna of British India, Moths, vol. 11.

Seychelles; Mahé (Morne Blanc; Cascade, 1000 ft.; Morne Pilot 2000 ft.),

ras; 1 2.

71. Hypena masurialis Guen., Delt. et Pyr., p. 38.

Seychelles : Silhouette, 1000 ft., 10 specimens; Praslin; Frigate. African, Oriental,

Australasian regions.

72. Hypena varias Walk., Cat., xxxiv, p. 1136.

Seychelles: Silhouette (3 specimens). Natal, Madagascar, Ceylon.

14 PERCY SLADEN TRUST EXPEDITION

73. Ophiuche conscitalis (Walk.), Cat., xxxiv, p. 1509.

Seychelles: Mahé; Silhouette; Praslin; Frigate; common. African, Oriental,

Australasian regions.

74. Arrade erebusalis Walk., Cat., xxvii, p. 82.

Seychelles ; Silhouette, 1000 ft., 29. Ceylon.

75. Arrade massalis Swinh., Proc. Zool. Soc. London, 1885, p. 866.

Seychelles: Silhouette, 1000 ft., 2, 9. India (Bombay).

76. Hyblea puera (Cram.), Pap. Exot., ii, p. 10; Hamps., Moths Ind., u, p. 371.

Seychelles; Mahé, 2?; Praslin. African, Oriental, Australasian regions.

77. Hyblea xanthia Hamps., Proc. Zool. Soc. London, 1910, p. 453, pl. 38, fig. 26.

Aldabra 3¢. Two of the specimens resemble the type from Africa; the third

differs from them in having a great reduction of the black irroration of the fore wing,

while the hind wing has a black discal dot in place of the black suffusion, and the black

marginal border is reduced to a few black specks. Previously known from South Africa.

Lymantride.

78. Porthesia pectinata, n. sp. (Plate 1, fig. 12, 3.)

g. Head, thorax and abdomen creamy white. Antennze long (10 mm.) and strongly

pectinated ; the branches brown and the shaft thinly covered with white scales. Wings

white ; fore wing with the costa moderately arched ; outer margin slightly curved.

?. Antenne shorter than in ¢, less strongly pectinated. Colour as in gf. Fore wing

with the costa highly arched and outer margin more curved than in gf. Anal tuft

apparently greyish. Hapanse f 40 mm., ? 49 mm.

The specimens are not in the best of condition but the species is abundantly distinct,

_ and I have no hesitation in describing it.

Seychelles ; Silhouette, high jungle, 2000 ft., 2%, 1 9.

Hypside.

79. Hypsa subretracta Walk., Cat., vii, p. 1676.

Seychelles; Mahé (Joannis, 1?). No specimen has been obtained since Joannis

recorded it, and the species is probably not resident. Also in Africa.

80. Deilemera seychellensis Hamps., Ann. Mag. Nat. Hist., ser. 8, i, 1908, p. 485.

Seychelles; Mahé; Silhouette, 1000 ft., 7 , 14 2.

81 Argina astrea (Drury), Ill. Exot. Ins., u, p. 11, pl. 6, fig. 3.

1 Zand 1? approach the form pardalina in having the spots ringed with greyish

white ; the remainder are all the form pylotis.

Seychelles: Mahé; Silhouette; low country to 1000 ft., 23, 89. Madagascar,

Mauritius, Réunion, India, Australasian region.

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. 15

Sphingide.

82. Herse convolvuli (Linn.); Roths. and Jord., Revis. Sphing., p. 11 (1903).

Seychelles: Mahé (Port Victoria); Silhouette, 1 4,19. European, African, Oriental,

Australasian regions.

83. Acherontia atropos (Linn.); Roths. and Jord., Revis. Sphing., p. 18.

Seychelles; Mahé, 14 specimens. Europe, Africa, Madagascar.

84. Cephonodes hylas (Linn.); Roths. and Jord., Revis. Sphing., p. 467.

Seychelles: Mahé ; Silhouette ; 9 specimens. Aldabra; Assumption ; 3 specimens.

Africa (South of Sahara), Madagascar, islands of Indian Ocean.

85. Deilephila nerii (Linn.); Roths. and Jord., Revis. Sphing., p. 507.

Seychelles; Mahé, 2 specimens. Europe, Africa, Madagascar, India, Ceylon.

86. Macroglossum alluaudi (Joann.); Roths. and Jord., Revis. Sphing., p. 628.

Macroglossa alluaudi Joann., Bull. Soc. Ent. France, 1893, p. 52.

Seychelles: Mahé. No specimens obtained since the species was described. ‘Now

perhaps extinct or possibly never resident.

87. Nephele hespera (Fabr.), Syst Ent., p. 546; Hamps., Moths Ind., i, p. 108.

Seychelles; Silhouette ; 1 example of a uniform smoky brown form with two white

diseal dots. India, Ceylon, Australia.

88. Temnora fumosa, subsp. peckoveri (Butl.), Trans. Zool. Soc. London, 1877,

p. 637.

Temnora fumosa peckovert Roths. and Jord., Revis. Sphing., p. 574.

Seychelles; Mahé; Silhouette; 2 worn examples. Madagascar, Comoro Islands.

89. Hippotion osiris (Dalm.); Roths. and Jord., Revis. Sphing., p. 750.

Seychelles; Mahé, 3 specimens. Spain, Africa, Madagascar.

90. Hippotion aurora Roths. and Jord., Revis. Sphing., p. 812.

Assumption; a single example. Diego Suarez, Madagascar.

91. HMippotion eson (Cram.); Roths. and Jord., Revis. Sphing., p. 754.

Seychelles; Silhouette; 2 examples bred from larvae found in jungle at about

2000 ft. Africa, Madagascar, Mauritius.

Geometride.

92. Scardamia (?) percitraria, n. sp. (Plate 1, fig. 13, 2.)

3. Head, thorax and abdomen orange yellow; antenne pectinated, grey. Fore

_ wing orange yellow, sometimes irrorated with rufous as in S. metallaria; an ex-curved

‘ antemedial line from costa at one-third to inner margin at one-half; a postmedial line

from costa at three-quarters to inner margin, excurved to vein 6, then parallel to outer

margin; both ante and postmedial lines, costa, and also a narrow marginal series of

specks with metallic silver reflection; cilia orange yellow. Hind wing as fore wing

but with antemedial line very indistinct and postmedial line uniformly and slightly

ex-curved.,

16 PERCY SLADEN TRUST EXPEDITION

¢ differs from the ¢ in being suffused with rufous and is consequently darker in

colour. Hxpanse 19—20 mm.

Aldabra, 5 2, 2 2.

93. Petrodava leucicolor (Butl.), Ann. Mag. Nat. Hist., ser. 4, xvi, 1875, p. 417.

Seychelles: Mahé and St Anne (Fletcher); not in present collection. Madagascar

and Africa.

94. Todis stibolepida (Butl.), Cist. Ent., ii, p. 394; Swinh., Trans. Ent. Soe.,

1904, p. 547.

Assumption, | example. Aldabra, 4 examples. Farquhar (Fletcher). Madagascar,

Cape Colony.

95. Comostola lesaria (Walk.), Cat., xxii, p. 544.

Seychelles; Mahé; Silhouette; 6 specimens. India, Ceylon, Australia, Japan.

96. Comostolopsis simplex Warren, Nov. Zool., ix, p. 494.

Aldabra, 4 specimens, which, though very small, probably are local forms of the

above species. Also East Africa.

97. Craspedia minorata (Boisd.), Faun. Ent. Madag. p. 115.

Acidalia consentanea Walk., Cat., xxii, p. 745.

Craspedia actuaria Hamps., Moths Ind., iii, p. 432.

Seychelles: Mahé; Silhouette; Bird; Dennis; Praslin; Frigate. Aldabra. Numerous

specimens from all localities. African and Oriental regions.

98. Gymmnoscelis tenera Warren, Nov. Zool., viii, p. 209.

Seychelles: Mahé; Silhouette; Félicité ; 4 specimens.

Described from Ogrugu, Lower Niger River.

99. Chloroclystis metallicata Fletcher, Trans. Linn. Soc. London, ser. 2, Zool., xiii,

1910, p. 287.

Seychelles; Mahé, 2 specimens.

100. Chloroclystis sp.?

Two further members of this genus were obtained, one in Seychelles and one in

Aldabra, the former being identical with Fletcher's undescribed species from Praslin

(Trans. Linn. Soc., ser. 2, Zool., vol. xiii, p- 287). Their condition is not such as

to make description advisable.

101. Ozolla inexcisata, n. sp. (Plate 1, fig. 14, ¢.)

g. Head, thorax and abdomen pale ochreous brown. Fore wing with the costa

straight almost to apex which is slightly produced ; outer margin hardly excised below —

apex ; in colour light ochreous brown irrorated with black ; an oblique brown antemedial

line strongly marked on costa, afterwards indistinct ; parallel oblique postmedial lines

from just before apex to inner margin at three-quarters; a black discal dot and a brown

dash on costa at two-thirds; a further brown costal dash near apex and a submarginal

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. ly

line represented by a series of brown dashes; a series of marginal black points between

the termination of veins; cilia ochreous. Hind wing with outer margin somewhat

produced at vein 6; in colouration as fore wing but the postmedial line is situate nearer

the centre of wing and is more strongly marked ; the submarginal series of dashes is also

accentuated and grey in colour; the antemedial line is absent. Hapanse 28 mm.

This species may be distinguished from its allies by the outer margin of the fore wing

being hardly excised below the apex.

Seychelles ; Silhouette, 1000 ft., 1 ¢.

Epiplemide.

102. Epiplema moza Butl., Ann. Mag. Nat. Hist., ser. 5, i, 1878, p. 402.

Seychelles; Silhouette, 1 specimen in bad condition. Japan, India.

103. Dirades theclata (Guen.), Uran. et Phal., ii, p. 36; Hamps., Moths Ind., iii,

p: 132.

Seychelles; Mahé, Long Island; Silhouette, 1000 ft.; 4 specimens. West Africa,

India, Ceylon, Burma.

Nymphelide.

104. Danais chrysippus (Linn.); Boisd., Faun. Ent. Madag., p. 35.

Seychelles: Mahé; Silhouette; numerous specimens, all typical. Aldabra ;

abundant, most specimens showing white scales on the veins of the hind wing. Old

World, tropical and sub-tropical regions.

105. EHuplea nutra Moore, Cat. Lep. Mus. E. I. Co., i, p. 127.

Seychelles: Mahé, 11 specimens; Silhouette, 10 specimens. Fletcher records a

preponderance of the 3 sex, but this is not confirmed in the present collection, the sexes

being nearly even (f 11, $ 10). Previously this species was only known from Mahé ;

Holland indeed records it from Aldabra but I have little doubt the latter record is

due to a confusion of localities. The species is a denizen of the ancient Seychelles jungle

and is extremely conspicuous ; Aldabra is quite unsuited to it while in addition I cannot

conceive it possible that I should overlook it in five months’ collecting, covering both wet

and dry seasons.

106. Melanitis leda (Drury), Ul. Exot. Ins., i, pl. 15, ff 5 and 6.

Seychelles: Mahé, 9 specimens; Silhouette, 17 specimens. Assumption (Dupont),

1 tattered specimen, probably a migrant.

All the Mahé specimens are of the wet season (ocellate) form, the Silhouette

examples being the dry season form. Voeltzkow records this species from Aldabra but

it can hardly be resident there as I did not see a single example. Voeltzkow’s specimen

may have been a wind-driven example from Madagascar. Africa, India, Australia.

107. Pyrameis cardui (Linn.); Saalm., Lep. Madag., p. 77.

Seychelles: no specimen in the present collection but the species is recorded from

Mahé by Mr H. P. Thomasset and from St Anne by Mr J. A. de Gaye, records in which

SECOND SERIES—ZOOLOGY, VOL. XV. 3

18 PERCY SLADEN TRUST EXPEDITION

I have entire confidence. Aldabra; one specimen was seen on Picard Island in January ;

it appeared after a squall from the south-west and after resting for ten minutes went away

again to the north-west. Assumption, 1 specimen (Dupont, 1910). Worldwide (except

Arctic, Antarctic regions and New Zealand).

108. Precis orithyia, var. madagascarensis (Guen.), Vinson’s Voy. Madag.,

Annexe F (Lep.), p. 37 (1865).

Aldabra, 2 specimens, November, dry season form, January, wet season form.

Cosmoledo, 2 specimens, September, wet season forms: this is somewhat curious as

September is the dryest month of the dry season. Assumption, 1 specimen (Dupont).

Madagascar Oriental region (type).

109. Precis clelia (Cram.), Pap. Exot., i, p. 38, t. 21.

Aldabra, 6 specimens, 5 of the dry season form in November, 2 wet season in

January. Assumption, 1 specimen, dry season form. Astove, 1 specimen, dry season

form. Madagascar, South and East Africa.

110. Precis rhadamea (Boisd.), Faun. Ent. Madag., p. 44.

Astove, 4 specimens of the dry season form: the species was not uncommon

near the lagoon shores. Madagascar, Mauritius.

111. Hypolimnas misippus (Linn.); Saalm., Lep. Madag., p. 82.

Seychelles: Mahé, St Anne (Fletcher) ; no specimens in present collection. Aldabra,

a few examples, all ¢: ¢ were not uncommon in January just before I left: the ? seem

to appear later, for Mr Thomasset obtained several, March 1908. Found throughout

tropical regions.

112. Atella phalantha (Drury), Ill. Exot. Ins., i, pl. 21, 1, 2; Saalm., Lep. Madag.,

ps Ole

Aldabra, numerous specimens. Also known from Tropical and South Africa,

Madagascar, Mascarenes, India, Ceylon, Burma, Siam, China, Japan, Malay sub-region.

113. Atella philiberti Joann., Bull. Soc. Ent. France, 1893, p. 51.

Seychelles: Mahé; Silhouette; Praslin; numerous specimens, 800—2000 ft.

(I doubt the records for Aldabra and Glorioso Island: they perhaps refer to the

previous species).

Papilionide.

114. Papilio disparilis Boisd., var. nana Oberth., Etudes d’Entomologie, iv, p. 54.

Seychelles? Not in present collection and no record for many years; it is certainly

not resident now. I expect the record, from which the variety was described, was made

from a wind-blown specimen or its offspring. An inhabitant of Réunion.

Pieride.

115. Catopsilia florella (Fabr.), Syst. Ent. p. 479; Joann., Ann. Soc. Ent. France,

1894, p. 409.

Seychelles: Mahé, recorded by Joannis. It is at present unknown in the archipelago

and was recorded perhaps from a wind-blown specimen,

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. its)

116. Teracolus pernotatus Butl., Proc. Zool. Soc. London, 1876, p. 159, pl. 7, fig. 1.

Aldabra, abundant. Astove, noticed but specimens not obtained. Africa,

Madagascar (?)

117. Teracolus evanthides (Holl.), Proc. U. S. Nat. Mus., xviii, p. 268.

Aldabra; numerous but less so than the preceding species. Madagascar (?)

118. Teracolus aldabrensis (Holl.), Proc. U. 8, Nat. Mus., xvii, p. 269.

The determination of this species was confirmed by Dr F. A. Dixey.

Aldabra. Assumption. Astove. The species was common on each island.

119. Terias brigitta (Cram.); Trim., S. Afr. Butt., iii, p. 14.

Aldabra: extremely common, both wet (after November) and dry season forms.

Madagascar, East and South Africa.

120. Terias floricola (Boisd.), Faun. Ent. Madag., p. 21.

Terias boisduvalliana Mab., Hist. Mad. Lep., i, p. 253.

Aldabra. A second Terias occurred on Aldabra but somewhat rarely: Voeltzkow

records this species as 7. desjardinsi (Boisd., op. cit., p. 22) but a comparison with the

specimens of the latter species in the National collection induces me to refer my

specimens to floricola Boisd.

Lycenide.

121. Zizera maha (Kollar); Bingh., Butt. Ind., i, p. 355.

Seychelles, Mahé. No specimens in present collection ; the evidence Fletcher gives

(Tr. Linn. Soc. ser. 2, Zool., vol. xiii, 1910, p. 293) seems hardly sufficient to cause the

inclusion of the species in the Seychelles list. Known from India and Burma.

122. Zizera lysimon (Hiibn.); Bingh., Butt. Ind., u, p. 357.

Seychelles: Mahé; Silhouette; Praslin; Bird and Dennis Islands; numerous

specimens, chiefly from low country to 800 ft. Aldabra; uncommon, chiefly near the

wells at Takamaka. South Europe, Africa, Madagascar, India, ete.

[123. Zizera gaika (Trim.), Trans. Ent. Soc. London, 1862, p. 403.

Seychelles. Recorded by Holland, probably in error for Z. lysimon. Africa, India,

Burma, etc. |

124. Zizera (?) malathana (Boisd.), Faun. Ent. Madag., p. 26.

Both Voeltzkow and Holland record this species from Aldabra: I have two

specimens which may belong to malathana but are too rubbed to ascertain definitely.

Madagascar.

125. Polyommatus boeticus (Linn.); Bingh., Butt. Ind., 11, p. 432.

Seychelles: Mahé, low country, abundant. §. Europe, 8. Asia, Africa, Madagascar,

Mauritius.

3—2

20 PERCY SLADEN TRUST EXPEDITION

126. Hypolycena philippus (Fabr.), Ent. Syst., mi (1), p. 283 ; Trim., S. Afr. Butt.,

isp: lL:

Aldabra ; several specimens, December, January. Africa, Madagascar.

127. Syntarucus telicanus (Lang), Verz. Sem. Schmett., 1, p. 47.

Seychelles, Mahé, numerous in the low country. Aldabra; four worn specimens.

S. Europe, 8. Asia, Africa, Madagascar, Mascarenes.

Hesperide.

128. Hagris sabadius (Gray), Griffith’s “ Animal Kingdom,” xv, p. 594; Guen.,

Maillard’s Réunion, Lép., p. 19.

Seychelles: Mahé, 7 specimens; Silhouette, 11 specimens; all from jungle above

800 ft. Madagascar, Mauritius, Réunion.

129. Hagris sabadius var. aldabranus, n. var. (Plate 1, fig. 15, 2).

I give this name to a small insect (ewpanse 30 mm.) which appears to be a local

dwarf form of E. sabadius. It differs also in being lighter in colour; the markings less

distinct ; the underside of the antennz lighter. I saw a large number of specimens in the

Pemphis bush and all were of the small size mentioned above.

Aldabra, 5 2, 1 2.

130. Parnara borbonica (Boisd.), Faun. Ent. Madag., p. 65; Holl., Proce. Zool.

Soc. London, 1886, p. 62.

Seychelles: Mahé; Silhouette; Praslin (Fletcher). 8. Africa, Mascarenes, Madagascar.

131. Parnara morella (Joann.), Bull. Soc. Ent. France, 1893, p. 52.

Seychelles: Mahé; Silhouette (Fletcher).

132. Parnara gemella (Mab.), Bull. Soc. Ent. Belg., 1884, p. 187; Holl., Proc.

Zool. Soc. London, 1896, p. 62.

Seychelles: Mahé; Silhouette; Praslin. Madagascar.

133. Rhopalocampta arbogastes (Guen.), Maillard’s Réunion, Lép., p. 19; Holl.,

Proc. Zool. Soc. London, 1896, p. 99.

Seychelles: Mahé. Fletcher captured a single specimen. Not in the present

collection and probably not resident. Madagascar, Réunion.

Thyridide.

134. Hypolamprus obscuralis Hamps., Moths Ind., i, p. 365.

Aldabra, 11 specimens. India (Sikkim).

135. Rhodoneura tibiale, n. sp. (Plate 1, fig. 16, 2.)

g. Head, thorax and abdomen purple brown, palpi lighter. Wings purple brown,

lineally striated with dark brown, the strize being numerous, fine and somewhat indistinct.

Fore wing with a hyaline spot below cell between veins 2 and 3; underneath it between

veins | and 2 are 2 yellow spots, followed beneath by a second hyaline spot ; cilia purple

brown, on hind wing tipped with pink. Underside lighter than upper side, tinged with

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. 21

pink, the strize being more distinct ; on outer margin beneath apex is a small semi-circular

dark suffusion with one or more yellow dots; just beyond discocellulars is a narrow yellow

bar, extending from vein 8 to vein 5, bordered with brown and divided medially by a

brown stria; the hyaline and yellow spots more prominent than on upper side. Legs

brown, tinged with pink, the hind tibise being much swollen and fringed on the inner side

by a fan of long hair. Hapanse 29—31 mm.

Superficially this species resembles a dark R. myrtea, but it is readily distinguished

by the swollen hind tibiz of the ¢.

Seychelles : Silhouette, 1000 ft., 1 ¢; Marie Anne Island, 1 2.

136. Rhodonewra apicale, n. sp. (Plate 1, fig. 17, 2.)

Head, thorax and abdomen fuscous brown. Palpi with second joint obliquely

upturned, third joint porrect ; in colour fuscous irrorated with brown scales. Front pair

of legs coloured as palpi, mid and hind pair darker; hind tibize somewhat laterally

flattened, with a tuft of hair arising from near articulation with femora, and a second tuft,

black and conspicuous, near apex. Fore wing with costa straight to near apex, then

moderately arched, the apex being markedly produced ; fuscous brown in colour, lighter

towards margin, with numerous fine brown striations ; a white spot, bordered with dark

brown, below cell, and a second spot, indistinct, below it and slightly nearer base of wing ;

a few black spots on costa, most distinct towards apex ; also one or two near the white

spot; a series of brown points along outer margin ; cilia fuscous brown tinged with pink.

Hind wing coloured as fore wing but without white spot ; scattered brown points near

inner margin and from base of wing to apex. Underside lighter than upper but similarly

coloured ; a narrow dark brown sub-apical patch; a curved dash beyond discocellulars ;

the white spot very distinct. Hapanse 26 mm.

This species may be easily distinguished by the production of the apex, a feature

which is quite conspicuous.

Seychelles: Silhouette, 1000 ft., 1 2.

137. Rhodoneura aldabrana, n. sp. (Plate 1, fig. 18, 9.)

g. Head, thorax, abdomen, legs and palpi light fuscous brown; palpi obliquely

upturned, second joint hardly reaching beyond frons; third joint small. Fore wing light

fuscous brown, tinged with rufous and uniformly striated with darker brown, the striz

being somewhat waved ; costa tinged with pink and interrupted by numerous black points,

of which two just before apex are comparatively large and conspicuous ; cilia fuscous brown.

Hind wing as fore wing but to a larger extent irrorated with rufous scales; the outer

margin defined by a pink linear border which is slightly extended near outer angle ; cilia

light fuscous, banded with darker fuscous and tipped with pink.

2 differs from the # in that the wings are wholly suffused with brick red, the strize on

the fore wing being greyish fuscous and on the hind wing rufous; the red border to the

hind wing extends to the fore wing also. Tergum of last abdominal segment clothed with

black and white scales; anal tuft pink tipped with yellow.

PERCY SLADEN TRUST EXPEDITION

Underside in both sexes light fuscous striated with rufous and brown ; a semi-circular

fuscous subapical patch and traces of a brown suffusion on discocellulars. Haxpanse :

$15 mm.; ¢ 18 mm.

This species appears to be allied to Siculodes minutula (Saalmiiller, Lep. Madag.,

p. 216), but is quite distinct.

Aldabra, 2 3%, 4 9.

Pyralide.

138. Mucialla(?) rufivena (Walk.), Cat., xxx, p. 960.

Aldabra; 1 9 in bad condition, probably this species. Ceylon, Borneo, New Guinea.

139. Culladia admigratella (Walk.), Cat., xxvii, p. 192; Hamps., Moths Ind., iv,

jas Mil.

Seychelles: Mahé; Silhouette, 16 specimens; Praslin (Valhalla). Africa, India,

Ceylon, Mauritius, Sumatra, Philippines.

140. Crambus seychellellus Fletcher, Trans. Linn. Soc. London, ser. 2, Zool., xiii,

LOMO! spm2o 7.

Seychelles ; Mahé; Silhouette ; 21 specimens, coast to 1500 ft. This species shows

little variation; a medial fascia may be well marked or absent, while the intensity of

colouration varies slightly ; otherwise this series produces nothing to add to Fletcher's

description.

141. Crambus auronivellus, n. sp. (Plate 1, fig. 19, 2.)

g. Head and thorax white. Antenne simple, fuscous. Palpi rather short, second

joint porrect, third obliquely downturned ; both second and third joints white above, yellow

underneath. Legs white, tarsi yellowish. Fore wing glistening white, costa sometimes

tinged with yellow ; a yellow striga, sometimes obsolete, from costa at two-thirds to cell ;

a sub-marginal line oblique from costa to vein 5, then obtusely angulated and obsolescent ;

a second oblique striga, parallel to the sub-marginal line and nearer apex, reaching vein 5 ;

apex either filled in by a small triangular yellow patch or crossed by a third parallel oblique

striga; on outer margin between veins 2 and 3 is a short black wedge-shaped dash

internally edged with yellow and extending on to cilia as a dark neous patch; cilia

white, with a golden metallic reflection distally ; striz and sub-marginal line also with

a metallic lustre. Hind wing shining white. Hapanse 13—16 mm.

Seychelles: Mahé; Silhouette ; low country to highest jungle, 7 ?.

142. Crambus ?sp.?

Two $ of a species of crambite almost certainly new were obtained on Aldabra, but,

as their condition is poor and I have hopes of better material from the locality, I consider

it inadvisable to name the species. For convenience of those working on species of the

Madagascar region the following particulars may be given :—palpi with second joint porrect,

third obliquely down-turned ; antenne minutely ciliated. Fore wing very light ochreous

or cream-coloured ; a brown discal dot; a uniformly curved sub-marginal line; margin

narrowly brown; cilia concolorous with ground-colour of wing. Hind wing white with

a slight fuscous tinge. Haxpanse 16 mm.

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. 23

143. Diptychophora muscella, n. sp. (Plate 1, fig. 20, 3.)

3. Head, thorax, palpi white tinged with fulvous; abdomen white, each segment

basally with some yellow scales ; the posterior segments dark laterally. Fore wing white,

much suffused with brown and fulvous; a fulvous costal streak ; a brown nearly straight

antemedial line, bordered internally with white and fulvous; an indistinct discal spot

which is surrounded by an irregular fulvous area continuous with the costal streak ; an

indistinct double postmedial line which is curved from costa to near discocellulars and

then passes very obliquely to inner margin at two-thirds; the apical area yellow, with an

irregular white spot; occasionally two black marginal spots near veins 2 and 3; cilia

somewhat variable ; usually blackish at base, then white and distally smoky ; cilia round

sub-apical excision white. Hind wing white, much suffused with grey towards outer

margin; traces of a curved postmedial line; cilia grey with a darker band near base.

Expanse 8 mm.

? as f¢ but without the slight thickening of antennz. This species comes nearest to

D. minutalis Hampson, but may be distinguished by the great obliquity of the postmedial

line which forms a smaller angle with the inner margin and approaches more nearly the

antemedial line.

Seychelles: Mahé, 800 ft., 2 ¢; Silhouette, 1000—1500 ft., 15 2, 7 9.

144. Cirrochrista perbrunnealis Fletcher, Trans. Linn. Soc. London, ser. 2, Zool.,

aim, 1910, p. 297.

Two $, which only differ from the ¢ type in being larger (32 mm.).

Seychelles: Mahé, Cascade, 800 ft., 22; St Anne, 1 2.

145. Ephestia cautella (Walk.), Cat., xxvil, p. 73; Hamps., Moths Ind., iv, p. 66.

Seychelles (Joannis). Two very worn specimens (), probably of this genus and

species were obtained in Mahé. Tropical and sub-tropical regions.

146. Heterographis insularella Rag., Bull. Soc. Ent. France, 1893, p. 295.

Seychelles: no specimens in present collection: received from Mahé by Joannis.

147. Euzophera scabrella Rag., Nouv. gen. p. 32; Rag., Romanoff Mem. viii. (1901),

p- 63, pl. xxiv. fig. 5.

Aldabra, 8 specimens. Africa (Accra).

148. Nephopteryx, n. sp.

Aldabra 1 ¢. <A specimen of a new species near emussitatalla Rag., but more

material is required for description.

149. Epicrocis, un. sp.?

Aldabra (several specimens). Better material is required for description.

150. Phycita (sub-genus ?) pectinicornella, n. sp.

Palpi with the second joint not hollowed out to receive maxillary palpi, which carry

a brush of long hairs ; antennz with first joint slightly thickened ; shaft for three-quarters

24 PERCY SLADEN TRUST EXPEDITION

of length with each joint carrying a bunch of cilia on the upper surface and a single ciliated

branch on the lower. Head and thorax grey. Fore wing grey with much fuscous irroration ;

a brownish medial line from middle of costa, waved to middle of vein 1. c, then acutely

angled and bent outwards to inner margin ; a brown dot at lower angle of cell ; sometimes

a second near upper angle; a sub-marginal line brown bordered with white externally,

incurved opposite cell, then straight to beyond vein 2, afterwards obtusely angled and

bent outwards to inner margin; outer margin with indistinct brown points; cilia grey.

Hind wing greyish fuscous, semi-hyaline.

? differs from ¢ in having the antennz simple, the palpi more slender and the third

joint longer. Hxpanse 32 mm,

Seychelles: Mahé, 800—1000 ft., 1 ¢; 1 2; Silhouette, 1500 ft., 2 2.

151. Cryptoblabes sp.? near plagioleuca Turner, Proc. Roy. Soc. Queensland, xviii,

1904, p. 150.

Seychelles ; Mahé (800 ft.), 3 specimens (2), worn.

152. Etiella znckenella (Treits.), Schmett. Eur., 1x, 1, p. 201; Hamps., Moths

Ind., iv, p. 108.

Seychelles: Mahé, 2 specimens. Aldabra, 1 specimen. Tropical and sub-tropical

regions.

Note. The Phycitid material from the Seychelles is in too poor condition to be dealt

with satisfactorily : in the expectation of more material therefore I have made no attempt

to describe fresh species from bad types, a proceeding which would only lead to confusion.

153. Endotricha vinolentalis Rag., Ann. Soc. Ent. France, 1890, p. 525.

Aldabra, 17 2. Seychelles: Mahé and St Anne. West Africa, Mayotte (Comoros).

154. Endotricha mesenterialis (Walk.), Cat., xvi, p. 285; Hamps., Moths Ind, iv,

p- 1338.

Recorded by Joannis from Seychelles; probably owing to confusion with the next

species. India, Burma, Formosa.

155. Endotricha flavofascialis, n. sp. (Plate 1, fig. 21, ¢.)

3. Head, thorax and palpi purplish fuscous, the latter with some yellow scales in

centre; antenne ciliated with a recurved spine on basal joint. Abdomen purple with

a slight yellow crest on basal segments. Fore wing dark purple red or purple black;

a broad yellow (sometimes whitish) central fascia with a breadth of nearly half length

of cell, the inner edge waved, ex-curved, distinct, the outer edge somewhat incurved and

indistinct ; a faint waved sub-marginal line; 5 yellow points on costa from sub-marginal

line to fascia; cilia yellow with a purple line at base and suffusion near centre.

Hind wing dark purple with a broad whitish central fascia, broadest on disc (one-

third length of wing), narrower towards inner margin; the edges of the fascia distinct,

waved ; cilia yellow with a purple line along margin of wing.

? closely resembles the 2 of H. mesenterialis but has the markings more obsolete.

Wings with the colour from fuscous to dull brick-red, not so rufous as in EH. mesenterialis.

Fore wing with traces of an antemedial line corresponding to the inner edge of the fascia

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC 25

in the ¢; a faint discal dot ; a faint waved sub-marginal line; a series of purple points on

outer margin; cilia basally purple, distally yellow. Hind wing darker than fore wing ;

traces of a lighter central fascia ; a series of purple marginal points ; cilia as in fore wing.

Expanse: $ 20 mm.; ? 18 mm.

This species was first discovered by Fletcher who refrained from describing it on

account of the poor condition of his specimens. It is closely related to HL. mesenterialis

but differs constantly in the # sex, (1) by being-darker in colour than the darkest variety

of mesenterialis, (2) in the width of the fascia on the fore and hind wing. The $ of the

two species resemble each other closely but the ? flavo-fascialis is to be distinguished

by its duller and more fuscous colour and by the indistinctness of the markings.

Seychelles; Mahé; Silhouette, 800—1000 ft., 9 2, 15 9.

156. Pyralis manhotalis Guen., Delt. et Pyr., p. 121.

Seychelles; Mahé, up to 800 ft., 8 specimens (2 dwarfs, half normal size). Aldabra,

12 specimens. Neo-tropical, African (?), Oriental and Australian regions.

157. Pyralis farinalis (Linn.); Staud., Cat. Lep. Pal., 1, p. 45.

Seychelles; Praslin (Valhalla). Not found in present collection.

158. Hypsopygia mauritialis (Boisd.), Faun. Ent. Madag., Lep., p. 119.

Seychelles: Mahé; Silhouette; Bird; 10 specimens, 2 dwarfs, half normal size.

Madagascar, China, India, Burma, Java, Sumatra, Celebes.

159. Hymenoptychis sordida Zell., Stockh. K. Vet.-Ak. Handl., 1852, p. 65.

Aldabra. 7 2, 22; common in the mangrove swamps, never found elsewhere. The

larva probably feeds on the mangroves Rhizophora, Bruguiera and Ceriops. 8. Africa,

Calcutta, Ceylon, Rangoon, Malacca, Borneo, Marshall and Ellice Islands.

160. Bradina aureolalis Joann., Bull. Soc. Ent. France, 1899, p. 198.

Seychelles: Mahé and Silhouette, 24 specimens; Praslin (Fletcher). The ? is

sometimes much suffused with fuscous.

161. Diathraustodes leucotrigona Hamps., Moths Ind., iv, p. 233.

Seychelles: Silhouette, 1000 ft., a single worn ¢ which in the absence of better

material I refer to the above species. India (Nilgiris).

162. Sufetula minimalis Fletcher, Trans. Linn. Soc. London, ser. 2, Zool., xiii,

1910, p. 301.

Seychelles: Mahé; Silhouette; Félicité ; coast to 1500 ft., 43 specimens. Coetivy.

163. Zinckenia fascialis (Cram.), Pap. Exot., iv, p. 236; Hamps., Moths Ind.,

iv, p. 262.

Seychelles: Mahé and Dennis, 13. Aldabra, 4. Tropical regions.

164. EHurrhyparodes tricoloralis (Zell.), Stockh. K. Vet.-Ak. Handl., 1852, p. 31;

Hamps., Moths Ind., iv, p. 264.

Seychelles : Mahé; Silhouette; Dennis, 28 specimens. Africa, Mauritius, India,

Ceylon, islands of Indian Ocean, Java, Australia.

SECOND SERIES—ZOOLOGY, VOL. XV. 4

26 7 PERCY SLADEN TRUST EXPEDITION

165. Pagyda traducalis (Zell.), Stockh. K. Vet.-Ak. Handl., 1852, p. 54; Hamps.,

Moths Ind., iv, p. 272.

Seychelles: Mahé, 3 ¢; St Anne (Fletcher). Tropical regions.

166. LErcta ornatalis (Dup)., Lép. France, viii, p. 207; Hamps., Moths Ind., iv,

p- 274.

Seychelles: Mahé; Silhouette; Praslin ; Félicité; Frigate; Dennis. Tropical regions.

167. Marasmia venilialis (Walk.), Cat., xvii, p. 373; Hamps., Moths Ind., iv, p. 276.

Seychelles: Mahé;. Silhouette. Africa, Mauritius, India, Ceylon, islands of the

Indian Ocean, Australasian region.

168. Marasmea trebiusalis (Walk.), Cat., xviii, p. 718; Hamps., Moths Ind., iv, p. 276.

Seychelles: Mahé and Silhouette, coast to 1000 ft.; Bird. W. Africa, India,

Ceylon, Hongkong, Sumatra, Fiji.

169. Marasmia trapezalis (Guen.), Delt. et Pyr., p. 200; Hamps., Moths Ind., iv,

p-. 277.

Seychelles: Mahé; Silhouette; Frigate; coast to 1000 ft. Tropical regions.

170. Syngamia abruptalis (Walk.), Cat., xvii, p. 371; Hamps., Moths Ind., iv, p. 279.

Seychelles: Mahé, 1 9 (Fletcher, Mahé, 3 specimens). Africa, Mauritius, India,

Australasian regions.

171. Nacoleia niphealis (Walk.), Cat., xviii, p. 638; Hamps., Moths Ind., iv,

p. 313.

Seychelles: Mahé; Silhouette; Dennis; Frigate; coast to 1500 ft.

172. Nacoleia maculalis Fletcher, Trans. Linn. Soc. London, ser. 2, Zool., xviii,

1910, p. 304.

Seychelles: Praslin, 1 example (Fletcher).

173. Nacolera vulgalis (Guen.), Delt. et Pyr., p. 202; Hamps., Moths Ind., iv,

p- 315.

Seychelles: Mahé; Silhouette; Bird; Dennis; coast to 1500 ft. The Mahé and

Silhouette specimens are suffused with fuscous, those from Bird and Dennis Islands being

yellow. Found throughout tropical regions.

174. Nacoleia charesalis (Walk.), Cat., xviii, p. 709 ; Hamps., Moths Ind., iv, p. 319.

Seychelles: Mahé and Félicité (15 specimens, coast to 1500 ft.). This species was

described from a : all the ¢s from Seychelles and other localities (Singapore, etc.) have

a tuft on the antennz at about a quarter and the species appears to require a new section

near Hampson’s Sect. IJ. India, Ceylon, Singapore, Sumbawa, Borneo, Philippines.

175. Syleptw derogata (Fabr.), Syst. Ent., p. 641; Hamps., Ann. Mag. Nat. Hist.,

ser. 8,1, 1908, p. 487.

Seychelles: Mahé, 1 specimen. Tropical regions.

176. Glyphodes sericea (Drury); Pag., Lep. Het. Madag., p. 135.

Seychelles: Mahé; Silhouette; 6 specimens. W. Africa, Sudan, Mashonaland, Natal,

E. Africa, Madagascar.

FRYER—THE LEPIDOPTERA OF SEYCHELLES, ETC. 27

177. Glyphodes tritonalis (Snell.), Tijd. v. Ent., xxxviii, 1895, p. dol.

Seychelles: Félicité, 2 specimens. South-East Africa.

178. Glyphodes wnionalis (Hiibn.) ; Hamps., Moths Ind., iv, p. 351.

Seychelles: Mahé, 1 specimen. ‘Tropical and sub-tropical regions.

179. Glyphodes stolalis Guen., Delt. et Pyr., p. 293.

Seychelles: Mahé; Marie Anne; Félicité; Dennis; 20 specimens, all of the

Seychelles form (Fletcher, op. cit., p. 308). Africa, India, Ceylon, Sumatra, ete.

180. Glyphodes subamicalis Fletcher, Trans. Linn. Soc. London, ser. 2, Zool., xiii,

1910, p. 308.

Seychelles ; Mahé, 2 specimens.

181. Glyphodes sinuata (Fabr.); Hamps., Moths Ind., iv, p. 358.

Seychelles; Mahé (Fletcher); Silhouette, 14 specimens, coast to 1000 ft. Africa,

India, Ceylon.

182. Glyphodes indica (Saund.), Trans. Ent. Soc. London, 1851, p. 163; Hamps.,

Moths Ind., iv, p. 360.

Seychelles: Mahé; Marie Anne; Bird. Aldabra, 4. Tropics of Old World.

183. Lepyrodes capensis Walk., Cat., xxxiv, p. 1344.

Aldabra, 2 specimens. South Africa.

184. Analyta calligrammalis Mab., Bull. Soc. Philom. Paris, 1879 (2), iat, pe 143;

Aldabra. Assumption, 9 specimens. Accra, Sierra Leone.

185. Crocidolomia binotalis Zell., Stockh. K. Vet.-Ak. Handl., 1852, p. 66.

Seychelles: Mahé, Port Victoria (6 specimens). 8. Africa, India, Ceylon, Burma,

Java, Formosa, Norfolk Island, Australia.

186. Hellula undalis (Fabr.), Ent. Syst., ii (2), p. 226; Hamps., Moths Ind., iv,

p. 373.

Seychelles: Frigate (Fletcher); Dennis, 1 specimen. Tropical regions.

187. Omphisa anastomosalis Guen., Delt. et Pyr. p. 373; Joann., Ann. Soc. Ent.

France, 1894, p. 436.

Seychelles: Mahé (Joannis) ; Silhouette, 1 9, 1500 ft. India, Ceylon.

188. Ischnurges expeditalis (Led.), Wien. Ent. Mon., vii, pp. 372, 466, t. 9, fig. 15

(1863).

Aldabra, 19. 8S. Africa.

189. Nomophila noctuella (Schiff. und Denis), Syst. Schmett. Wien, p- 136 (1775).

Assumption, 1 9. Universal.

190. Pachyzancla phaopteralis (Guen.), Delt. et Pyr., p. 349; Hamps., Moths Ind.,

iv, p. 402.

Seychelles: Mahé, Silhouette, Praslin (Fletcher); 5 specimens, 800—1500 ft.

Africa, India, and Neo-tropical Regions.

191. Pachyzancla mahensis Fletcher, Trans. Linn. Soc. London, ser. 2, Zool., xiii,

1910, p. 310.

Seychelles: Mahé. | Apparently unrepresented in present collection.

28 PERCY SLADEN TRUST EXPEDITION

192. Pachyzancla minoralis (Warren), Ann. Mag. Nat. Hist., ser. 6, ix, 1892, p. 435.

Seychelles: Mahé. West Africa, Accra, Lagos.

193. Phlyctenodes massalis (Walk.), Cat., xviii, p. 792; Hamps., Moths Ind., iv,

p- 408.

Seychelles: Frigate and St Anne (Fletcher, not in present collection). Aldabra,

9 specimens. Accra, Transvaal, Madagascar, India, Ceylon, Queensland.

194. Antigastra catalaunalis (Dup.), Lép. France, vii, p. 330; Joann., Ann. Soe.

Ent. France, 1894, p. 436.

Seychelles: Mahé (Joannis: not in present collection). Universal.

195. Pionea ferrugalis (Hiibn.); Hamps., Moths Ind., iv, p. 422.

Seychelles: Mahé, Silhouette ; 5 specimens. Universal in Old World.

196. Pionea aureolalis (Led.), Wien. Ent. Mon., vii, 1863, pp. 375, 473.

Aldabra, 3 specimens. India, Ceylon, Andamans.

197. Pyrausta incoloralis (Guen.), Delt. et Pyr., p. 332; Hamps., Moths Ind.,

iv, p. 438.

Aldabra, 1 specimen. Syria, Aden, Congo, South Africa, India to Australia.

198. Pyrausta mahensis Fletcher, Trans. Linn, Soc. London, ser. 2, Zool., xiii,

1910, p. 311.

Seychelles : Mahé; Silhouette; 16 specimens, 80—1500 ft.

EXPLANATION OF PLATE 1.

Fig. 1. Ilema contorta, n. sp. f. (See text throughout for expanse.)

Fig. 2. Mahensia seychellarum, gen. et sp. n, §.

Fig. 3. Mahensia seychellarum, gen. et sp. n., neuration of wings.

Fig. 4. Philenora subfusca, n. sp., &.

Fig. 5. Rhodogastria aldabrensis, n. sp., &-

Fig. 6. Fudina aldabrana, n. sp. &.

Fig. 7. Oruza rupestre, n. sp. g.

Fig. 8. Stimplicia inareolalis, n. sp., neuration of wings.

Fig. 9. Hydrillodes perplexalis, n. sp. g', palpus.

Fig. 10. Rivula dimorpha, nu. sp.,

Fig. 11. Chusaris nigerrimalis, n. sp. g.

Fig. 12. Porthesia pectinata, n. sp., gf.

Fig. 13. Scardamia percitraria, n. sp. &-

Fig. 14, Ozolla inexcisata, n. sp.,

Fig. 15. EHagris sabadius Gray, var. aldabranus, n. var, 3.

Fig. 16. Rhodoneura tibiale, n. sp. gf.

Fig. 17. Rhodoneura apicale, n. sp., g.

Fig. 18. Rhodoneura aldabrana, n. sp., ¢.

Fig. 19. Crambus auronivellus, n. sp., .

Fig. 20. Diptychophora muscella, n. sp., .

Fig. 21. Endotricha flavofascialis, n. sp. .

Percy Srapen Trust Exprepirion

Ge) TRANS. LINN. SOC. SER. 2, ZOOL. VOL. XV. PL.

14 15 16 17

18 19 20 21

=. Wilson, del.

LEPIDOPTERA FROM SEYCHELLES

No. I1—HYMENOPTERA, APOIDEA.

By T. D. A. CockrereLi, Professor of Systematic Zoology, University of Colorado.

(Communicated by Pror. J. Strantey Garpiner, M.A., F.R.S., F.L.S.)

(Text-figures 1—3.)

Read 15th June, 1911.

THE interesting series of bees brought together by Mr Hugh Scott shows that the

islands of the Indian Ocean are by no means so poor in these insects as the previous

scareity of records might have suggested. The present paper deals almost wholly with

the species of two groups, the Seychelles and Aldabra, including with the latter Assumption

Island.

The Seychelles bee-fauna may be divided into groups as follows :

(1) Endemic species, apparently without close relatives elsewhere : Sphecodes scotti,

Halictus mahensis.

(2) Endemic or precinctive species and subspecies, very closely allied to those found

elsewhere. These may be again divided into

(a) Species of Holarctic affinities: Ceratina nodosiventris, C. tabescens.

(b) Species of African affinities: Mesotrichia incerta seychellensis.

(3) Wide-spread species, perhaps introduced by man: Megachile disjuncta, M.

rufiventris, M. seychellensis, Apis unicolor. The case of Megachile seychellensis is

peculiar. In its typical form, it is known from the Seychelles and Farquhar, but it has

a small race in Aldabra. The Hawaiian MW. palmarum is almost identical. Thus we seem

to have a widespread insular type, with slightly differentiated species or races.

The absence of any distinct Indian element will be noted.

The Aldabra fauna may be similarly divided :

(1) Endemic species, very distinct: Halictus aldabranus, Ceratina fryeri.

(2) Endemic or precinctive species and subspecies, very closely allied to those found

elsewhere :

(a) Species of Holarctic affinities: Halictus nicolli, Heriades aldabranus.

(b) Race of Seychelles species: Megachile seychellensis aldabrarum.

30 PERCY SLADEN TRUST EXPEDITION

(3) Madagascar species: Anthophora antimena.

The Aldabra fauna seems not to have been contaminated by human introductions.

It is in strong contrast with that of the Comoro Islands, some 200 miles to the south-west.

From the Comoros Friese (1907) records Apis mellifera L., A. unicolor Latr., Halictus

2 spp. not determined, Megachile rufiventris Guér., Gronoceras felina Gerst., Mesotrichia -

caffra L. (I suppose really incerta Pérez), M. olivacea Spinola, and M. lateritia Klug,—

an essentially African fauna, with nothing precinctive, unless the undetermined species of

Halictus are so.

Here, as in the Pacific, it is noted that many of the insular bees are such as habitually

nest in wood, e.g. Megachile, Ceratina and Mesotrichia. It is probable that they have

sometimes been carried across the sea by floating trees containing the nests. In the case

of the Seychelles, it appears that they might receive material from the Malay region, the

equatorial current setting west and ultimately north-west. On the other hand there are

apparently currents also from the African coast region. No current, however, flows from

India to the Seychelles and, so far as the bees go, there may be said to be no truly Indian

element in the fauna.

The bee-fauna of the Maldives is frankly Oriental, and quite distinct from that of the

Seychelles.

Family Andrenide. Subfamily Sphecodine.

SpHECODES Latreille.

1. Sphecodes scotti, sp. nov.

?. Length about 7—74 mm., very slender, looking like a male; head rather large,

approximately circular seen from in front, black, with the clypeus, lower part of supra-

clypeal area, labrum and mandibles all clear ferruginous; lower margin of clypeus with

long shining hairs ; sides of face broadly covered with appressed silvery (faintly yellowish)

pubescence; ocelli moderate; front with dense extremely minute punctures, and a tendency

to strie ; third and fourth antennal joints extremely short, broader than long, fourth at

least twice as broad as long; second longer than third ; scape with the basal two-thirds

red ; flagellum shining black, dull reddish beneath at extreme base ; mesothorax shining,

finely punctured, parapsidal grooves distinct ; the surface between the punctures is micro-

scopically tessellate ; thorax with a fine short hoary pubescence at sides and behind, but

very free from hair; mesothorax black, its middle third reddish or wholly dark red ;

scutellum small, red; postscutellum and upper part of metathorax black, the rest of

thorax, including prothorax, pleura &c., all clear red; metathorax long, the basal area

elongate, defined by the absence of the small branched hairs which clothe the adjacent

parts, its sculpture consisting of a fine raised reticulation ; legs red, with little hair (no

scopa), middle and hind tibiz and basitarsi strongly blackened; tegule shining ferru-

ginous ; wings ample, pale dusky, nervures and stigma piceous; stigma large ; first r.n.

joining second s.m. far beyond middle but well before end ; second r.n, joining third s.m.

slightly or well beyond middle; submarginal cells variable ; abdomen narrow, brilliantly

shining, clear red beneath, above fuscous with the basal half of first segment (except more

COCKERELL—HYMENOPTERA, APOIDEA 31

or less at sides), narrow band at base of second, broad bands at base of third and fourth,

and sides of third, all light ferruginous ; dark parts of fourth and fifth segments black or

brown; no caudal rima, the fifth segment covered with fine hair. Hind spur minutely

pectinate, with about 13 teeth. Mouth-parts (measurements all in »): mandibles simple,

Fig. 1. Sphecodes scotti, labrum of female.

1020 long, 375 broad at base ; labrum as shown in accompanying figure ; blade of maxilla

very short; maxillary palpi with joints measuring: (1) 100, (2) 135, (8) 160, (4) 160,

(5) 160, (6) 160. Labial palpi: (1) 135, (2) 120, (3) 100, (4) 120. Tongue short, pointed,

length 425, breadth at base 220.

Localities. Seychelles Islands, five females collected by Mr Hugh Scott. The type

is from Silhouette, “plateau of Mare aux Cochons,” September 1908. The others are all

from Mahé; two from Cascade Estate, about 1000 ft. alt., February—March 1909, two

from Cascade Estate, 800—1000 ft., not dated.

This is an extremely distinct species, easily known by its largely red thorax. I do

not know any related form, although some males of other species look very similar.

Subfamily Halictine.

Hauicrus Latreille.

2. Halictus aldabranus, sp. nov.

g. Length about 44 mm., slender, black ; clypeus yellow, with lateral margins and

two broad discal bars dark; the discal bars are rounded at each end, and do not nearly

reach base or apex of clypeus; the lateral lobes of clypeus have their yellow in the form

of a subpyriform patch, nearly divided from the rest of the yellow by a black band ; labrum

broad and short, black ; mandibles black, red at extreme tip; molar space nearly obsolete ;

tongue long and slender, extending about 340 » beyond the labial palpi; palpi normal,

length of maxillary palpi about 645 »; hind part of cheeks with long dull white finely

plumose hair; eyes very strongly emarginate within; ocelli large, diameter of middle

ocellus about 135 w; head and mesothorax with very fine sculpture, minutely lineolate

passing into reticulate; antennz long, entirely black, the flagellum hardly crenulated ;

second and third antennal joints very short, their combined length about equal to fourth

(about 170); postscutellum lemon yellow; tubercles yellow; metathorax shining but

punctured, the truncation not distinctly defined, but the large basal area distinct, under

a lens appearing dull and granular, but when more magnified showing a very fine irregular

raised reticulation, passing into distinct plicee at the sides; tegulee piceous, not punctured ;

32 PERCY SLADEN TRUST EXPEDITION

wings more or less dusky, strongly so at apex, stigma and nervures piceous; first ru.

joining second t.c.; second s.m. small, narrowed to a point above ; length of first s.m. below

about equal to that of the other two combined (about 375 »); outer side of third s.m. with

a single gentle curve; outer nervures not at all weakened ; legs black, with dull white

hair; small joints of tarsi reddish ; abdomen black, with narrow tegumentary yellow bands

along apical margins of first three segments, that on third interrupted in middle; sculpture

of abdomen feeble; first segment smooth, with scattered very minute punctures visible

only with compound microscope; second and third with fine transverse striz ; no hair-

bands; stipites very broad, broadly rounded at end.

Locality. Aldabra 1908 (J. C. F. Fryer). The type is labelled 312, which shows

that it was taken on Esprit Island, December 27.

The unique specimen is in poor condition, with the wings matted, but the species is

so distinct that it will be easily recognized. It is doubtless endemic, and its nearest

relative, so far as known to me, is H. flavovittatus W. F. Kirby, from Socotra. HH. flavo-

vittatus differs in several particulars, for instance, the postscutellum is not yellow.

3. Halictus (Evyleus) nicolli, sp. nov.

@. Length about 8 mm., black, with dull white or greyish-white pubescence; structure

quite ordinary; head broad, eyes very black, face with short dull white hair; mandibles

with the apical half dark reddish ; antennz black, the apical part of the flagellum broadly

suffused with ferruginous beneath ; clypeus slightly shining ; mesothorax dull, exceedingly

minutely punctured ; scutellum more shining ; area of metathorax large, covered with fine

anastomosing ridges, the intervals shining; posterior truncation rather small and in-

distinct ; tegule shining dusky rufous; wings clear, iridescent; nervures and stigma

reddish sepia; outer nervures evanescent ; first r.n. joining second s.m. at extreme apex ;

second s.m. little narrowed above; legs black, with pale hair, small joints of tarsi dark

reddish ; anterior tibize ferruginous in front ; a bright red brush at end of hind basitarsus ;

abdomen dullish, very minutely punctured, hoary with pale hair, especially the apical

half; second and third segments with very strong greyish-white basal hair-bands, basal

band on fourth not quite so dense, but covering more than half of segment.

The following characters are microscopical :

Hind spur with about three spines, the last a mere short lamella; third antennal

joint distinctly longer than fourth ; mesothorax with a minutely tessellate sculpture, and

rather numerous small punctures; scutellum sculptured like mesothorax, postscutellum

covered with creamy-white tomentum; abdomen distinctly though very minutely

punctured on first segment.

g. Length about 7 mm., more slender; clypeus wholly black ; flagellum dull ferru-

ginous beneath ; knees, tibize and tarsi ferruginous, but the hind tibiz have a large black

patch in front, and the apical joint of tarsi is darkened basally; abdominal bands evanes-

cent. The antennz are not very long.

Localities. Female (type) from Aldabra (2. P. Dupont); British Museum, 1907—72.

Male from Assumption Island (22. P. Dupont, 1909). For an account of both Aldabra

and Assumption, see M. J. Nicoll, Three Voyages of a Naturalist (1908), chapters x1. and

COCKERELL—HYMENOPTERA, APOIDEA 33

xu. I intended to name the species after the collector, but there is already a species

HZ. duponti Vachal; I therefore use the name of the author to whom I am indebted for

a description of the type locality*.

This is a very ordinary species of Hvylaus, a group common in Europe, North America

and other parts of the world.

The female H. nicolli, except for the antennze, has a very strong superficial resem-

blance to the male of H. diversus Smith from Willowmore, Cape Colony (Brawns). In

HH. diversus, however, the outer nervures are not weakened, and there are many other

differences. H. geigerie Ckll., from Benguela, is really much more closely related, but

differs from H. nicolli by the comparatively shining mesothorax, with its disc sparsely but

distinctly punctured, the basal abdominal bands reduced to lateral patches, &e.

A somewhat similar species is H. minikoiensis Cam., from the Laccadive Islands.

I examined the female type of this (Cambridge University Museum) and noted that it

was rather of the type of the American H. cooley: ; black ; head with pale hair; meso-

thorax dullish, with punctures of two sizes; tegule shining dark red-brown ; flagellum

ferruginous beneath ; stigma and nervures ferruginous; first r.n. meeting second t.c.;

hind spur with few long spines; abdominal segments with broad basal bands of pale

tomentum, usually concealed in middle by segment before.

4. Halictus mahensis Cameron.

Halictus mahensis Cameron, Trans. Linn. Soc. London, ser. 2, Zoology, vol. xii.

(1907), p. 70.

The following particulars may be added to Cameron’s account :

Hind spur of female with three or four large teeth ; mesothorax appearing granular

under a lens, with the compound microscope seen to be minutely tessellate and with small

punctures.

Mouth-parts (measurements all in »): mandibles bidentate; maxillary blade 425 long;

maxillary palpi, joints (1) 90, (2) 160, (3) 150, (4) 150, (5) 160, (6) 170. Labial palpi,

(1) 170, (2) 85, (3) 120, (4) 135, the first joint robust. Tongue about 1020, tapering at

end. These measurements are from a female; a male tongue measured about 935. The

labrum of the female has a large lobe; I figure the labra of both sexes.

Localities. Mr Scott obtained a very large series of this species from the Seychelles,

with the following data :

(1) Mahé. Cascade Estate, 800—1000 ft., 7 2, 1 2; Cascade Estate, January 1909,

1g, 1; Anonyme Island, January 9, 1909, 14 ¢,2 2; top of Mount Sebert, nearly 2000 ft.,

January 16, 1909, 1 ¢; Cascade Estate, February 1909, 2 2, 42; Cascade Estate, October

1908—January 1909 (Thomasset and Scott), 1 ¢, 1 2; Long Island, July 12—22, 1908,

1g, 12; Cascade Estate, February 1909, 1 2.

(2) Dennis Island. August 1908, 3 ¢. These were collected by J. C. F. Fryer.

* (For a full and accurately scientific account of these islands see J. C. F. Fryer’s article in Trans.

Linn. Soc., ser. 2, Zool., vol. xiv, pp. 397—442. This report was not published when the above was

written.—J. Stanley Gardiner. |

SECOND SERIES—ZOOLOGY, VOL. XV. 5

34 PERCY SLADEN TRUST EXPEDITION

(3) Silhouette. 19 2,79. Most from the low country, but a female comes from the

highest forest, over 2000 ft. (August 12, 1908). Two females and a male are “from marshy

plateau of Mare aux Cochons, about 1000 ft.”, August 27, 1908. Many are from Grande

Barbe. Mr Scott writes that numbers fly around the flowers of certain palms, or round

Fig. 2. Halictus mahensis, labrum.

flowers of a low-growing Vinca, &c., growing in waste places on the red earth where the

jungle has been cleared.

The species does not closely resemble any known to me.

Halictus mahensis race praslinensis nov.

g. Clypeus more produced, and its yellow band with a prominent upwardly directed

tooth-like extension ; tegule light reddish testaceous (much darker in typical form); hind

legs usually almost entirely red.

Locality. Six males from Praslin Island, taken by Mr Scott, November 26—December

2, 1908. One has darker tegule, and the characters of the race are average rather than

absolute ones. Mr Scott tells me that Mahé and Silhouette are much alike, but Praslin is

quite a different sort of place.

Family Ceratinide.

CERATINA Latreille.

5. Ceratina fryeri, sp. nov.

?. Length about 6 mm., black, strongly punctured; head large, eyes moderately

converging below ; face and front shining, with large punctures, so dense that the surface

is cancellate ; punctures of sides of face much larger than those on front ; on each side of

front is a delicate ridge, running downward close to the eye and turning inward below the

antennz, ending at the side of the supraclypeal area; clypeus elevated into a snout-like

structure, with a broadly emarginate projecting edge ; above the edge the surface is densely

punctured, and has upon it a small cream-coloured triangle ; below the edge is a large

smooth and shining plate, covering as it were the end of the snout, and extending down

to the base of the labrum ; this smooth plate has nearly the shape of a half-circle ; labrum

with large punctures; mandibles black, extremely massive at base ; eyes sage-green, black

in front; a tuft of red hair at end of labrum; antenne short, dark ; thorax strongly and

densely punctured, except disc of mesothorax, which is shining and has punctureless areas,

COCKERELL—HYMENOPTERA, APOIDEA 35

as in various other species; apical half of tubercles white, covered with white hair ; legs

black, the knees with a small white spot, and the anterior tibize with a white band on

basal half; tegule piceous, reddish on margin; wings moderately dusky, stigma and

nervures dark ; abdomen broad, shining and strongly punctured, with thin white hair.

Spurs pale yellowish; hind tibiz with a prominent tooth on outer side, beyond the

middle.

9. var. a Size and other characters the same, but smooth clypeal area smaller,

decidedly less than a half-circle.

g. var. duponti, nov. Smaller, length about 5 mm.; smooth clypeal area much

smaller, bow-shaped.

$. Size and superficial appearance of ? var. duponti; clypeus with a large hat-

shaped cream-coloured area; structure ordinary, without any smooth space ; labrum with

a large U in pale yellow ; end of abdomen obtuse, obtusely emarginate in lateral view, the

morphological apex with two short teeth ; tooth of hind tibia small.

Locality. Aldabra; one var. duponti (in British Museum) collected by R. P. Dupont;

all the others (one typical $, three var. a. 9s; one duponti ?, three gs) by J. C. F. Fryer.

One male is marked “swept from flowers.” A male and a female var. a. are labelled 312,

which shows that they were obtained on Esprit Island, December 27, 1908. Two females

var. a. are labelled 306, which refers to ‘Takamaka and fle Michel, November 1908.”

The variety duponti may prove to inhabit some particular island; it looks distinct, but

seems to have no characters beyond those cited.

This little species has a certain resemblance to the group of black forms common in

Africa, but is very distinct by the peculiar facial structure of the female, and the toothed

hind tibize. It is to be noted that a little black Ceratina (C. madecassa Friese) occurs in

Nossi-Bé, but it is a normal member of the genus.

6. Ceratina nodosiventris, sp. nov.

g. Length about 5 mm.; head and thorax dark green, the front, especially at sides,

with strong brassy tints, the mesothorax shining brassy-green ; clypeus nearly all ivory-

white, the white taking the form of an old-fashioned tall hat with a high crown; labrum

with a very small white spot; mandibles black; antennz black, the flagellum dark red

(1)

Fig. 3. Ceratina nodosiventris, male: (a) hind femur, (6) end of abdomen.

beneath ; eyes large, converging below; sides of face dullish, densely rugosopunctate ;

supraclypeal area shining; front rugosopunctate ; mesothorax closely punctured all over,

except along the usual lines ; scutellum closely and minutely punctured ; tubercles largely

yellowish-white ; tegule testaceous, with a cream-coloured spot ; wings dusky; legs black,

the tarsi becoming dark brownish ; anterior and hind tibie with a large cream-coloured

5—2

36 PERCY SLADEN TRUST EXPEDITION

stripe, starting from the base, middle tibize with only a small spot; middle femora flattened,

obtusely angulate beyond middle below ; hind femora with a prominent erect tooth below

near base ; abdomen dark yellowish-green, the hind margins of the segments narrowly dull

ferruginous ; apex broadly and squarely truncate, the truncation proceeding from a much

broader base, so that the side of the apex shows a very strong double curve; second ventral

segment with a shining transverse tubercle near the base.

Locality. Dennis Island, Seychelles, August 1908 (J. C. F. Fryer).

This is a member of Ashmead’s subgenus Zaodontomerus (cf. Ann. and Mag. Nat.

Hist., December 1899, pp. 404—406), and curiously enough, appears to find its nearest

relative in the palearctic C. dentiventris Gerst. The apex of the abdomen, however, is

not as in dentiventris; it may better be compared with that of the Mexican CL bakeri

H. 8. Smith, although the apical lobe is much more produced than in the Mexican

insect.

7. Ceratina tabescens, sp. nov.

?. Length about 44 mm.; a nearly uniform dark green; clypeus with a broad ivory-

white stripe, rather sharply pointed above, obtusely below, with straight sides for the

greater part of its length; labrum entirely dark ; flagellum dark red beneath; antennal

sockets in large depressed basins; face and front shining, sides of face with large punctures

on a shining ground; cheeks with a row of punctures next to orbital margins; mesothorax

shining, finely punctured; tubercles largely white; tegule ferruginous; wings slightly

dusky ; second s.m. very broad at base, but narrowed to a point above (not narrowed to

a point in nodosiventris); third t.c. practically straight above the bend (curved above the

bend in nodosiventris); legs dark brown, femora brown-black ; anterior femur with a short

pale stripe beneath ; anterior tibiz with a pale stripe on outer side; hind tibize with about

the basal half white on outer side; hind margins of abdominal segments not evidently

discoloured ; apex pointed as usual. The supraclypeal area is smooth and shining, with

three or four punctures, whereas in C. nodosiventris it is covered with fine wavy irregular

longitudinal striz, with minute scattered punctures (characters determined with the

compound microscope).

Locality. Mahé, Seychelles, collected by Mr Hugh Scott “in marshes on coastal

plain at Anse aux Pins and Anse Royale,” January 19—21, 1909.

Another species of Zaodontomerus, closely related to C. nodosiventris, but evidently

not its female, from the smaller size, and the differences in sculpture and venation. It

very closely resembles C. nautlana Ckll., from Mexico and Costa Rica.

Family Xylocopide.

Mesorricu1a Westwood.

8. Mesotrichia incerta seychellensis, subsp. nov.

g. Like M. incerta (Pérez), but hair of abdominal venter white at sides, black in

middle, nowhere yellow; long hair of anterior tarsi black, but some yellow above (especially

at base) and reddish beneath; hair of middle tarsi black, but dense and fulvous beneath

beyond basitarsus ; hair of hind tarsi entirely purplish-black ; apical segment of abdomen

COCKERELL—HYMENOPTERA, APOIDEA 37

black, covered with black hair which is more or less reddish at ends, and with a median

patch of bright yellow hair above ; black hair on hind tibia forming a broad band.

Compared with M. caffra (L.) it is uniformly smaller, and differs in the dark colour

of the hair of the tarsi, as well as in having a vertical yellow band on the clypeus. The

hair on the middle of the abdominal dorsum is much shorter than in caffra.

?. Like that of M. caffra but smaller, length about 18 mm.

Locality. Mahé, Seychelles, both sexes (H. Scott). Two males are dated November

1908. A female has been opened, and found to contain the usual abdominal mites, belong-

ing to the genus Paragreenia.

This is the insect recorded from the Seychelles by Pérez (Ann. Soc. Ent. France, 1895,

p. 205) as Xylocopa caffra and by Cameron (Trans. Linn. Soc. London, ser. 2, Zool. xii.,

p. 70) as Koptorthosoma caffrum. Upon comparing the Seychelles series (5 2, 4 2) with

a good series of genuine M. caffra from Cape Colony, I am convinced that they are

separable, though very closely allied. On the other hand, M. incerta Pérez, from Nossi-Bé,

has most of the essential characters of the Seychelles insect, and the differences are only

such as might be attributed to variation. Considering the remote locality of the Seychelles

bee, it might seem more logical to treat it as a species, but there is a certain practical

advantage in connecting it with M. incerta; and, in fact, it is not impossible that it

represents incerta introduced by man at an early date, and now somewhat modified.

Family Anthophoride. Subfamily Anthophorine.

ANTHOPHORA Latreille.

9. Anthophora antimena Saussure.

Anthophora antimena Sauss.; Grandidier, Hist. Madagascar, xx., Pt. 1. (1891), p. 6.

Locality. Aldabra, September 1908, one female (J. C. F. Fryer).

I have never seen an authentic specimen of A. antimena, described from Madagascar,

and so make my determination with a certain measure of doubt, since the bee belongs to

a group of closely allied forms, difficult to separate. There are however several characters

which seem to be distinctive, and agree with those described for antimena. Such are the

dull greyish fulvous (“fulvo-cinereus”) tint of the pubescence, with a plentiful admixture

of dark hairs on the head and thorax above (“pilis fuscis intermixtis”); the thin but

evident appressed fulvous hair on the dark parts of the abdomen (“ abdomine fulvo-cinereo

-appresso-piloso ”); the dullish fulvous apical bands; the conspicuous patch of black hair in

the middle of the fifth segment (‘‘segmento 5° ? macula nigra”); and the black hair on

the inner side of the hind tibia and basitarsus. The wings are faintly dusky ; the hair

on the outer side of the hind legs is ochraceous; the labrum is yellow, with the usual

basal spots ; the clypeus has a transverse yellow band, joined with a median upright one

which runs to a point; there are the usual supraclypeal and lateral marks.

Tt is fully 200 miles from Madagascar to Aldabra, but there are other islands

between.

38 PERCY SLADEN TRUST EXPEDITION

Family Megachilide. Subfamily Lithurgine.

Liraureus Berthold.

10. Lnthurgus scotti, sp. nov.

Length, $ about 114, ? about 12 mm., black with hair at apex of abdomen black or

brownish-black. A species of the group of ZL. atratus Smith (India), L. atrateformis Ckll.

(Australia) and L. albofimbriatus Sichel (Tahiti) ; so close to these that only a comparative

description is useful. It differs from all three in having the first recurrent nervure exactly

meeting the first transverso-cubital.

I possess only the male of L. atratus; from this L. scott? male differs at once by the

nearly simple character of the hind tarsi. The basitarsus is distinctly curved, with its

apical two-fifths swollen behind, but the apex is not expanded or in any way peculiar.

The front and vertex in atratus are covered with black hair, while in scott: the front is

clothed with pale ochreous (a few dark hairs intermixed in the region between the

antenne), while that of the vertex is mixed black and dull pale ochreous. In atratus

the white bands of the abdomen are conspicuous above and beneath; in scott? they are

reduced, and not so white, though quite evident toward the sides of the dorsal segments.

In atratus the marginal cell is much more sharply pointed, and the second submarginal is

much longer in proportion to its height.

Compared with female L. atratiformis, the female scott? is at once distinguished by

the wholly pale (creamy-white) hair of pleura (it is black in atratiformis), but by the

venation and other characters it is very closely allied.

Compared with female L. albofimbriatus, it is noted that the hair of the lower part

of the cheeks is strongly mixed with black in albofimbriatus, while it is all pale yellowish

in scottt. In both, the lower margin of the clypeus is bearded with shining orange hair.

The hind legs of male a/bofimbriatus are formed practically as in scotti. The hair of the

mesothorax and scutellum in male albofimbriatus is black, but in scott: it is greyish-white,

mixed with black on scutellum. In female L. albofimbriatus the supraclypeal area is

prominently keeled, but in scott: there is a raised smooth line, hardly a keel.

Locality. Mahé, Seychelles, one of each sex (H. Scott). The male is from Cascade

Estate, 800—1000 ft. ; the female from Anonyme Island, January 1909.

This is evidently quite distinct from ZL. aludens Sauss., from Madagascar. I have

L. albofimbriatus not only from Tahiti, but also from the Hawaiian Islands, whence I

have received both sexes from Dr Perkins, with the statement that it was introduced

about 1899.

It may be worth while to remark that the differences given by Bingham (Fauna

Brit. India) to separate L. atratus from L. dentipes are mainly sexual. L. dentipes was

based on a male from Australia; it can be distinguished from the male of L. atratiformis

by the colour of the pubescence.

The Lnthurgus of Christmas Island (L. andrewsi Ckll.) is very distinct from

LL. scott.

COCKERELL—HYMENOPTERA, APOIDEA 39

Subfamily Osmiine.

HERIADES Spinola.

11. Heriades aldabranus, sp. nov.

@. Length 54—6 mm. ; black, moderately robust, with the usual scanty white hair

abdomen with extremely narrow but distinct white hair-bands on all the segments ;

ventral scopa white. A very ordinary little species, closely related to the European

H. truncorum and the American H. carinatus, differing only as follows: general form

rather more compact, the abdomen rather short; clypeus with a pair of strong nodules

on its lower margin, these about 255 pw apart (not contiguous as in truncorum) ; mandibles

about as in cariénatus (much shorter than in trwncorwm), slightly reddish apically ; eyes

distinctly converging below (like cariatus, not like truncorum) ; clypeus and supraclypeal

area dull, minutely densely granular-punctate ; vertex moderate, distance from top of eye

to occiput about equal to distance to lateral ocellus (in truncorum especially the vertex is

much broader); diameter of cheeks less than diameter of eye (greater in truncorum) ;

mesothorax and scutellum shining, but entirely covered with large punctures, which have

a diameter of about 70 p (in truncorum the sculpture is similar, but somewhat finer) ; the

metathorax and base of abdomen offer nothing peculiar, except that the margin of the

abdominal basin is practically straight (strongly concave in truncorum); legs quite

ordinary (as in truncorum), the hind basitarsus more than half the width of the tibia ;

wings as in carinatus, with the same venation, but not quite so dusky (considerably

darker in trwncorum); sculpture of abdomen essentially as in truncorum, but segments

4 to 6 about equally (not densely) clothed with short appressed white hair. The face has

finely plumose white hair at the sides, but is not densely covered as it is in H. wrgentatus

Gerst. The pleura is thinly clothed with white hair.

Locality. Aldabra, September 1908, 2 ? (J. C. F. Fryer). One is labelled “ swept

from flowers.” One of the specimens has a parasitic mite upon the thorax.

Subfamily Megachiline.

MEGACHILE Latreille.

12. Megachile disjuncta (Fabricius).

Apis disjuncta Fabricius, Sp. Insect. I, p. 481 (1781).

Locality. Mahé, Seychelles (#7. Scott). One is from near Morne Blanc, 1908 ; another

from Long Island, July 1908.

13. Megachile rufiventris Guérin.

Megachile rufiventris Guérin; Bélanger, Voy. Ind. Orient., p. 502 (1834).

Localities. Mahé, Seychelles, two females, one from Long Island, July 1908 (H. Scott);

Félicité Island, December 1909 (JZ. Scott). This species has been reported as M. mystacea

(Cameron, Trans. Linn. Soe. Lond. xii. 1907, p. 70), but that Australian species is certainly

distinct, as F. Smith long ago pointed out.

40 PERCY SLADEN TRUST EXPEDITION

14. Megachale seychellensis Cameron.

Megachile seychellensis Cameron, Trans. Linn. Soc. Lond., ser. 2, Zoology, vol. xii.,

p- 71 (1907).

Locality. Mahé, Seychelles (#7. Scott); Silhouette, Seychelles (7. Scott); Praslin,

Seychelles (Gardiner); Farquhar Atoll (Gardiner). The Silhouette specimen, one female,

is from Mare aux Cochons, September 1908. Mahé specimens have the following data :

(1) Cascade Estate, 800—1000 ft.; (2) Cascade Estate, about 1000 ft., December 1908 ;

(3) near Morne Blane, 1908 ; (4) Long Island, July 12—22, 1908.

Mr Scott writes that they burrow in banks, in the red earth. He sends some nests,

which are made of leaves in the usual manner. The cells are about 14 mm. long and 74 broad.

Cameron describes the ventral scopa as white, but it is black on the last segment

and the greater part of the fifth. The species appears to be very closely related to

M. albiscopa Saussure, from Madagascar. It is a very ordinary little species, greatly

resembling the European M. apicalis Spinola; and also very similar to the Australian

M. quinquelineata Ckll. Both sexes vary considerably in size; one male from Mahé is

only about 8 mm. long.

I find, to my surprise, that it is almost impossible to distinguish M. seychellensis from

the Hawaiian M. palmarum Perkins, 1899. In the female, M. palmarum has the

mesothorax evidently less densely punctured, and the black hair of the ventral scopa is

confined to the last segment. The extreme sides of the third and fourth segments show

some black hair in seychellensis, whereas in palmarum this is found only on the fifth and

sixth. The black hair at the sides of the abdomen also serves to distinguish the male

seychellensis. The males, however, are almost exactly alike, and had they been found in

the same region no one would have thought of separating them.

Perkins states that M. palmarum nests frequently in leaves of coconut and other

palms, when they have been rolled up by the larva of a Pyralid. The nesting habits are

therefore different from those of M. seychellensis.

Dr Perkins expresses the opinion that M. palmarum has been introduced into the

Hawaiian Islands by man, as it is now common in Honolulu, but was not collected by

Blackburn, who could hardly have overlooked it, had it been present in his time.

Megachile seychellensis race aldabrarum nov.

Agreeing with M. seychellensis, but uniformly smaller; males 7 to 8, females 8 to

9 mm.; hair on inner side of hind tarsi paler and duller.

Localities. Aldabra, 1 $, 4 2, 1908 (J. C. F. Fryer); Aldabra, one male,

December 1908 (Fryer). Assumption Island, 5 ? (Rk. P. Dupont).

Family Apide.

Apis Linneeus.

15. Apis unicolor Latreille.

Apis unicolor Latr., Ann. Mus. Hist. Nat., v. (1804), p. 168.

Localities. Numerous workers from Mahé and Silhouette, Seychelles (ZZ. Scott); one

from Cosmoledo, 1907 (HZ. P. Thomasset). A male from Cascade Estate, Mahé, March

COCKERELL—HYMENOPTERA, APOIDEA 4]

1909, is very black, as described by Friese; Cameron’s male, described in the former

report, was not genuine wnicolor, Workers bear data as follows :

(1) Mahé. Long Island, July 12—22, 1908; Cascade Estate, February 1909.

Others are from various localities not specified.

(2) Silhouette. Grande Barbe, August 2, 1908; Mare aux Cochons, collected by

Gardiner.

This species was also obtained in the Amirantes and Chagos Islands (1905): see

Cameron, Trans. Linn. Soc. Lond., ser. 2, Zool., xii, p. 69 (1907).

Apis unicolor var. adansoni (Latreille).

Apis adanson Latr., Ann. Mus. Hist. Nat. v. (1804), p. 172.

Localities. Three workers from Cosmoledo, 1907 (H. P. Thomasset) ; one from Mahé,

Seychelles (Gardiner). In only one (from Cosmoledo) is the scutellum largely ferruginous ;

the others have it black, thus differing from true adansoni. In one (from Cosmoledo) the

yellowish-ferruginous covers the first three abdominal segments, except the hind margins ;

in the others it does not get beyond the second.

I include this variety under the continental (African) adansoni, because it is impos-

sible to define it satisfactorily as a distinct form. I believe, however, that it has arisen

independently from A. unicolor, to the typical form of which it is probably recessive. It

appears to be the prevalent form on Cosmoledo, but very rare in the Seychelles. It is

curious that no Apis was collected in the Aldabra group.

SECOND SERIES—ZOOLOGY, VOL. XV. 6

No. IN.—HYMENOPTERA, DIPLOPTERA.

By GErorrrEY Mrape-Watpo, B.A.

(CoMMUNICATED BY PROFESSOR J. Srantey Garpiner, M.A., F.R.S., F.L.S.)

Read 15th June, 1911.

Fam. Kumenide, Westw.

Eumenss, Fabr.

1. Eumenes alluaudi Pérez, Ann. Soc. Ent. France, xiv, p. 206 (1895); Cameron,

Trans. Linn. Soe. London, ser. 2, Zool., xii, p. 71 (1907).

Seychelles. Mahé, Praslin (1905); Mahé, Silhouette, Dennis Island, Praslin (1908—9);

also mud cells.

This insect very often makes its cells in rooms: it was not observed in the highest

forests.

Opynerus, Latr. Subgenus LE1onorus, Sauss.

2. Odynerus trilobus (Fabr.); Lepel., Hist. Nat. Ins. Hymén., ii, p. 635 (1841).

Odynerus chagosensis Cameron, op. cit., p. 73. .

Odynerus cenocephalus Cameron, op. cit., p. 72.

Odynerus chagosensis Cam. ? is a variety of O. trilobus, viz. Var. B, Sauss., Etud.

Fam. Vespid. i, p. 186 (1852), recorded from Mauritius, with yellow markings on the

disc of the mesonotum; the clypeus differs from that of typical O. trilobus in being

entirely yellow. Odynerus cenocephalus Cam. is typical O. trilobus (Fabr.).

Chagos Group: Salomon Atoll and Peros Banhos (1905).

O. trilobus is a common and widely distributed species, and is known from Madagascar,

Mauritius, Réunion and 8. Africa. The species has doubtless found its way to the majority

of the islands in the Indian Ocean.

3. Odynerus farquharensis Cameron, op. cit., p. 74, 9.

Type from Farquhar Atoll (1905); a large series of females and one male from Aldabra

(Fryer, 1908—9).

4. Odynerus seychellensis Dalla Torre, Genera Insectorum, Fascic. 19, p. 54 (1904).

Odynerus cylindricus Pérez (nec Saussure), Ann. Soc. Ent. France, lxiv, p. 207

(1895) ; Cameron, op. cit., p. 72.

Amirantes: Desroches Island and Poivre Island (1905).

Seychelles: Mahé, Silhouette, Praslin; not from the high damp mountain-forests

(Hugh Scott, 1908—9).

Also Mauritius.

44 PERCY SLADEN TRUST EXPEDITION

Fam. Vespide, Steph.

Pouistss, Latr.

5. Polistes macaensis Fabr., Ent. Syst., i, p. 259 (1793).

Polistes hebreus Cameron (nec Fabr.), Trans. Linn. Soe. London, ser. 2, Zool., xii,

p. 71 (1907).

Though the specimens are not quite typical, there can be very little doubt as to the

identity of the Seychelles Polistes: a comparison between the series from these islands

and the type ¢ in the Banksian Collection makes this abundantly clear. In the Seychelles

? there is usually no trace of red at the base of the second abdominal tergite, only

occasionally is there a little; in the type from Macao the base of this tergite is reddish,

contrasted with the yellow apex ; neither this specimen nor the Seychelles specimens have

the hind tibiz darkened. Distinction can best be drawn between P. macaensis and the

nearly allied P. hebreus in the g, Dr R. C. L. Perkins having drawn attention (Ent. Mo.

Mag., (2), xii, 1901, p. 264) to the excellent characters supplied by the spines on the

seventh sternite. Two ¢ were collected in the Seychelles, and in them these spines are

closely approximated, very long, and spatulate at the apex: spines of this form are

characteristic of P. macaensis, whereas in P. hebraeus they are far apart, very short, and

pointed at the apex.

Seychelles: Mahé and Silhouette, from low cultivated country, but not from the high

forests (Hugh Scott, 1908—9); Praslin (1905). Chagos Islands: Salomon Atoll and

Diego Garcia (1905). Amirantes Islands: Desroches Island, &c. (1905). A large series.

Note. The thoracic and abdominal markings of Odynerus seychellensis are of a

striking reddish-chrome colour (vide Répertoire des Couleurs); this colour is also prevalent

in Eumenes alluaudi Pérez, from the Seychelles, and in the fossor, Crabro (Dasyproctus)

scottt, Turner (Trans. Linn. Soc. London, ser. 2, Zool., xiv, p. 373, 1911). It would seem

that the insects with markings of this colour are indigenous to the Seychelles, since

none of the three species mentioned are found outside the group; on the other hand,

the widely spread and imported species preserve their normal type of marking.

No. IV.—HYMENOPTERA, PROCTOTRUPOIDEA.

Von Pror. Dr. J. J. Krerrer (Bitsch).

(Tafeln 2, 3 und 5 Textfiguren.)

(MitcErEILT von Pror. J. StaNLEY GarpINER, M.A., F.R.S., F.L.S.)

Gelesen den 15. Juni 1911.

Diz Hymenopteren, die hier in Betracht kommen, zerfallen in die Familien der

Dryinde, Bethylide, Ceraphronida, Scelionide, Diaprude, Belytide und Platygasteride.

Zu den Dryiniden gehéren 3 Arten mit 4 Exemplaren; zu den Bethyliden 7 Arten mit

26 Exemplaren, zu den Ceraphroniden 2 Arten mit je 1 Exemplar, zu den Scelioniden

30 Arten mit 189 Exemplaren, zu den Diapriiden 13 Arten mit 49 Exemplaren, zu den

Belytiden 7 Arten mit 83 Exemplaren, zu den Platygasteriden 4 Arten mit 5 Exemplaren.

Es wurden also 358 Individuen untersucht und dieselben zerfallen in 66 verschiedene

Species. Das Material wurde in den letzten Monaten des Jahres 1908 und in den ersten

Monaten des folgenden Jahres, von Hugh Scott gesammelt : die Typen der neuen Arten

befinden sich im British Museum.

I. Dryinide (Anteonide).

Mesopryinus Kieffer, in André, Spec. Hym. Eur. vol. ix. 1906, p. 497.

1. Mesodryinus mahensis, n. sp. (Plate 2, figs. 1, 2).

?. Briunlichrot und kahl; Kopf rotbraun, Gelenke der Antennen und der Beine

blass, Abdomen schwarz, ausgenommen das 1. und das letzte Segment. Kopf etwas quer,

glinzend, sehr fein und kaum merklich punktiert, Stirn trapezformig, breiter als die Augen,

kaum gewdélbt, eine Linie reicht von der vorderen Ocelle bis. zwischen den Antennen,

Hinterkopf nicht gerandet, abgestutzt, hintere Ocellen den Hinterrand des Kopfes

berithrend, Augen kahl, Mandibeln 4-ziihnig, iiusserer Zahn linger. Maxillarpalpen

5- oder 6-gliedrig, den Hinterrand des Kopfes beriihrend. Antennen schwach keulen-

formig, 1. Glied bogig, doppelt so lang wie dick, 2. diinner, um die Hiilfte linger als

dick, 3. am diinnsten, doppelt so lang wie das 1. und 2. zusammen, 4. kiirzer als die

Hilfte des 3., kaum linger als das 5., welches dreimal so lang wie dick ist, 4.-9. allmiihlich

verdickt und verkiirzt, 9. noch fast doppelt so lang wie dick, wenig kiirzer als das

10. Glied. Thorax sehr lang, schmaler als der Kopf, Prothorax mehr als zweimal so

lang wie dick, fast walzenrund, glatt, mit einer vorstehenden, elliptischen Stelle hinter

der Mitte; Mesonotum nach hinten allmiihlich breiter, kaum % der Linge des Prothorax

erreichend, fein punktiert, ohne Parapsidenfurchen; Scutellum ohne Querfurche ; Median-

segment linglich, allmihlich abschiissig, matt und lederartig. Fliigel rauchig, Fliigelgrund

46 PERCY SLADEN TRUST EXPEDITION

und eine durchlaufende Querbinde unter dem Stigma weiss, Cubitus aus dem vorderen

Viertel des Nervulus entspringend, in der Querbinde blass, eine grosse Cubitalzelle bildend ;

Radius winkelig, distaler Teil fast doppelt so lang wie der proximale, durch eine feine vena

spuria mit dem Vorderrand verbunden ; Stigma schmal, lanzettlich, braun mit weisser

Basis; 5—6 Frenalhiickchen. Vordere Coxe wenig linger als die Trochanteren, diese

halb so lang wie die Femora, vorderer Metatarsus so lang wie das 4. Glied, 2., 3. und

5. Glied sehr kurz, nicht linger als dick; inneres Glied der Scheere (Fortsatz des

5. Tarsengliedes) bis zum 2. Tarsenglied reichend, mit zwei Reihen weisser und dichter

Lamellen, am Ende stark eingekriimmt, die Lamellenreihen an der eingekriimmten Stelle

unterbrochen ; iiusseres Scheerenglied (Kralle) fast gerade, nur distal schwach bogig, mit

einer Reihe sehr weit voneinander abstehender Lamellen und mit einem kurzen Zahn vor

der Spitze. Abdomen depress, Analsegment stark lamellenartig seitlich zusammenge-

driickt. Linge: 5 mm.

Vorkommen. Seychellen-Inseln. Mahé: Country above Port Glaud, about 500—

1000 feet, 5. XI. 1908, 1 8.

Laseo Haliday, Entom. Mag. i. 1833, p. 273.

2. Labeo saxetanus, n. sp.

g. Schwarz und fein behaart; Mandibeln, Palpen, Coxze und Beine gelb, hintere

Tibien schwarzbraun. Kopf matt und fein chagrinirt, hinten mitten bis zu den Augen

abgestutzt, an den Schlifen etwas nach hinten vorgezogen, nicht gerandet, Scheitel und

Stirn schwach gewélbt, Augen fein behaart, oben den Hinterrand des Kopfes beriihrend,

dreimal so lang wie die Wangen, diese durch eine Furche vom Gesicht getrennt, Ocellen

ein Dreieck bildend, die hinteren von den Augen um ihren Durchmesser entfernt, den

Hinterrand des Kopfes fast beriihrend. Maxillarpalpen den Hinterrand des Kopfes

tiberragend, 5-gliedrig, das 1. Glied sehr kurz, die iibrigen lang, Labialpalpen sehr kurz,

2- oder 3-gliedrig. Die zwei ersten Antennenglieder fast doppelt so lang wie dick, das

3. viermal so lang wie dick, die folgenden allmihlich verktirzt und verengt, 9. noch

dreimal so lang wie dick. Pronotum von oben nicht sichtbar. Mesonotum matt und

fein chagrinirt, Parapsidenfurchen divergirend, im hinteren Drittel fehlend. Scutellum

schimmernd, fast glatt, wenig linger als das Mesonotum, vorn ohne Querfurche. Median-

segment grob lederartig, allmiihlich abschiissig, ohne Felder noch Leiste. Fliigel glashell,

mit drei geschlossenen Basalzellen und einer geschlossenen Radialzelle, Stigma lanzettlich,

Radius winkelig, distaler Teil 2—3-mal so lang wie der proximale ; mit Spur einer riick-

laufenden Ader, diese so lang wie der 1. Abschnitt des Radius und die Richtung des

2. Abschnittes fortsetzend; Analader entwickelt. Abdomen glatt, glinzend, depress.

Linge: 3,5 mm.

Var. 12; Beine vollstiindig gelb; scutellum glatt und gliinzend ; Linge 2,5 mm.

Vorkommen. Seychellen-Inseln. Mahé: top of Mount Sebert, nearly 2000 feet,

16. I. 1909. Silhouette: forest above Mare aux Cochons, IX. 1908, 1 ¢ var.

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA AT

AntEon Jurine, Nouv. méth. class. Hym. 1807, p. 302.

3. Anteon oriphilus, n. sp.

g. Schwarz und glinzend; Mandibeln, Palpen, 1. Antennenglied, Coxee und Beine

gelb. Kopf quer, dicht aber sehr wenig grob punktiert, Augen kahl, den Hinterhauptsrand

fast erreichend, hintere Ocellen so weit voneinander als von den Augen, doppelt so lang

von den Augen als vom Hinterrand des Kopfes, Mandibeln mit 4 braunen Zihnen,

dusserer Zahn am liingsten. Maxillarpalpen 5- oder 6-gliedrig, den Hinterrand des

Kopfes erreichend, Labialpalpen 2- oder 3-gliedrig. Antennen fein behaart, 1. Gled

fast doppelt so lang wie das 2., dieses etwas kiirzer als das 3., dieses sowie die folgenden

doppelt so lang wie dick. Pronotum von oben nicht sichtbar. Mesonotum und Scutellum

glatt und glinzend, Parapsidenfurchen im hinteren Drittel fehlend ; Scutellum vorn mit

einem Quereindruck ; Mediansegment allmihlich abfallend, matt und lederartig, mit

einem grossen, glatten, glinzenden und gerandeten Mittelfeld, welches im vorderen

Drittel stumpfwinkelig, in den zwei hinteren Winkeln allmihlich nach hinten verengt

ist; Metapleuren glatt, obere Hilfte sowie Mesopleuren matt und chagrinirt. Fliigel

glashell, Adern blass, Stigma braun, eine halbirte Ellipse darstellend, Radius winkelig

gebrochen, proximaler Abschnitt doppelt so lang wie der distale, Basalis in das Ende der

Subcostalis miindend. Abdomen glatt, gliinzend und schwach depress. Linge: 2,5 mm.

Vorkommen. Seychellen-Inseln. Mahé: top of Mount Sebert, nearly 2000 feet, 16.

I. 1909, 1 f.

II. Bethylide.

PARASIEROLA Cameron, Trans. Ent. Soc. London, 1883, p. 197.

4. Parasierola rostrata, n. sp.

$9. Schwarz; Mandibeln, Antennen, Coxze und Beine gelb, beim ? sind das distale

Drittel der Antennen, die Coxze und Femora braun bis schwarz. Kopf und Thorax fast

glatt, kaum merklich chagrinirt, Kopf etwas linger als breit, Augen 2—3-mal so lang wie

ihr Abstand vom Hinterrand des Kopfes, Clypeus stark gekielt, seitlich zusammenge-

driickt und schnabelartig iiber die Mandibeln hinaus verlingert. Antennen in beiden

Geschlechtern gleichgestaltet, 3.—13. Glied ziemlich kuglig. Pronotum wenig linger als

das Mesonotum, dieses so lang wie das Scutellum, Mediansegment matt, lederartig, mit

einer glatten Mittellingslinie. Fliigel glashell, Prostigma kleiner als das Stigma, beide

schwarz, Radius schwach bogenférmig beim ¢, fast gerade und am Ende plétzlich einge-

kriimmt beim ?, Median- und Submedianader sowie die Areola sehr blass. Analsegment

beim ? griffelartig, mit vorstehendem Bohrer, beim 3 mit zwei kurzen Lappen. Liinge :

2 mm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons, plateau and forest

above, IX. 1908, 1 #, 3 9. Mahé: Cascade Estate, about 1000 feet, I. 1909, 1 9.

PristocerA Klug, Beitr. z. Naturk. ii. 1810, p. 202.

1. Basalis nicht um ihre Liinge vom Stigma entfernt ......... 5. P. ecrucifera, n. sp.

Basalis wenigstens um ihre Linge vom Stigma entfernt...................06004 2.

2. Mediansegment fein chagrinirt ................sssecssseseseseesees 6. P. remota, n. sp.

Mediansegment grob gefeldert................0.ceseeeeeeee 7. P. pallidimanus, n. sp.

48 PERCY SLADEN TRUST EXPEDITION

5. Pristocera crucifera, n. sp.

g. Schwarz, glatt und glanzend ; Mandibeln und die 2 ersten Antennenglieder rot,

Coxe und Beine gelb. Kopf etwas linger als breit, mit zerstreuten, miissig grossen

Punkten, Augen fein behaart, kaum linger als ihr Abstand vom Hinterrand des Kopfes,

hintere Ocellen etwas weiter vom Hinterrand als voneinander entfernt, dreimal weiter von

den Augen als voneinander, Clypeus gekielt, Mandibeln fast halb so lang wie der Kopf,

allmahlich breiter, fiinfzihnig, éusserer Zahn grésser, Palpen bis zur Mitte des Kopfes

reichend. Scapus bogig, so lang wie das 3. Antennenglied, 2. Glied nicht linger als dick,

3.—138. dreimal so lang wie dick, Haare abstehend, so lang wie die Dicke der Glieder.

Pronotum nach hinten allmihlich erweitert, mit einem wenig deutlichen Quereindruck vor

dem Hinterrand, so lang wie das Mesonotum ; dieses mit 4 Liingsfurchen ; Querfurche des

Scutellum tief und gerade; Mediansegment linglich, runzelig, lateral abgerundet, nicht

gerandet, vorn mit einer kurzen Lingsleiste. Fliigel schwach angeraucht, Subcostalis von

der Costalis wenig entfernt, Stigma linealisch, dreimal so lang wie breit, mit weissem

Grund, Basalis schriig, etwas liinger als ihr Abstand vom Stigma, Radialis dreimal so lang

wie die Basalis, Medialis distal von den Basalzellen verlingert, die tibrigen Adern der

iiussern Submedianzelle erloschen ; eine weisse Liingslinie entspringt nahe der Mitte der

Basalis und verzweigt sich hinter der Mitte der Radialis, Vorderast am Grunde bogig, mit

dem Distalende der Radialis durch ein weisses Kreuzchen verbunden, Hinterast ebenfalls

mit bogigem Grund, durch eine weisse Transversalis mit der Analis verbunden. Femora

wenig verdickt. Abdomen flach gedriickt. Liinge: 3,5 mm.

Vorkommen. Seychellen-Inseln. Silhouette: forest above Mare aux Cochons, 2. IX.

1908, 1g. Praslin: Cédtes d’Or Estate, especially from Coco-de-Mer forest in the Vallée

de Mai, XI. 1908, 1 g. Mahé: high damp forest at summit of Pilot, over 2000 feet,

X.—XI. 1908, 2 $; Mare aux Cochons district, 1000—2000 feet, 26. I. 1909—2. II. 1909,

1 ¢; Caseade Estate, about 800 feet and in the forest above, from 1000—2000 feet, 1908

and 1909, 4 2.

6. Pristocera remota, n. sp.

g. Schwarz; Mandibeln, die 5 ersten Antennenglieder, Coxe und Beine rot. Kopf

linglich, schimmernd, fast glatt, Mandibeln halb so lang wie der Kopf, mit 3—4 Zahnen,

Augen kahl, so lang wie ihr Abstand vom Hinterrand des Kopfes. Scapus so lang wie

die 2 folgenden Glieder zusammen, 2. Glied so lang wie dick, 3.—13. doppelt so lang wie

dick, Behaarung kiirzer als die Dicke der Glieder. Thorax wie bei voriger Art, aus-

genommen dass das Mediansegment fein chagrinirt und seitlich gerandet ist, die

Mittellingsleiste durchlaufend, Metapleuren glatt und gliinzend. Fliigel wie bei voriger

Art, ausgenommen dass die Basalis kiirzer ist als ihr Abstand vom Stigma, die beiden

Zinken der weissen Liingslinie am Grunde gerade und nicht bogig. Linge: 3,5 mm.

Vorkommen. Seychellen-Inseln. Mahé: Mare aux Cochons district, 26. I.—2. IT.

1909; 1 &.

7. Pristocera pallidimanus, n. sp.

g. Schwarz; die 3 oder 4 ersten Antennenglieder und die Tarsen lehmgelb. Kopf

und Thorax wie bei voriger Art, Augen kahl, kaum linger als ihr Abstand vom Hinter-

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 49

rand, Flagellumglieder kaum linger als dick. Mediansegment grob gefeldert. Fliigel

dunkel. Geiider wie bei voriger Art. Abdomen flach gedriickt. Liinge: 2,3 mm.

Vorkommen. Seychellen-Inseln. Mahé: high damp forest at summit of Pilot, over

2000 feet, X.—XI. 1908, 1 ¢.

DissompHaLus Ashmead, Bull. U. S. Nat. Mus. P. 45, 1893, p. 41.

Hintertibien vor dem Ende ausgerandet .................0065 8. D. excisicrus, n. sp.

Mancertibien ohne Ausrandung ................csscosnceretuense 9. D. saxatilis, n. sp.

8. Dissomphalus excisicrus, n. sp.

¢. Schwarz, matt und fein behaart; Mandibeln, Antennen ausgenommen das

verdunkelte Distalende, Coxze and Beine weisslichgelb. Kopf fast kreisrund, mit wenig

dichten und miissig groben Punkten, Zwischenriiume chagrinirt, Augen behaart, so lang

wie ihr Abstand vom Hinterrand des Kopfes, hintere Ocellen etwas weiter vom Hinterrand

als voneinander, doppelt so weit von den Augen als voneinander, Clypeus gekielt. Scapus

so lang wie die 3 folgenden Glieder zusammen, 2.—13. Glied wenig linger als dick, fein

behaart. Thorax dorsal punktiert und chagrinirt wie der Kopf; Mesonotum quer, so lang

wie das Pronotum, Parapsidenfurchen fast parallel ; Scutellum ktirzer als das Mesonotum,

vorn mit eimer breiten Querfurche; Mediansegment quer, grob gerunzelt, mit einer

Mittellingsleiste, seitlich nicht gerandet aber abgerundet und glatt, hinterer abfallender

Teil des Mediansegmentes und Metapleuren feiner gerunzelt, ersterer mit einer Mittel-

lingsleiste. Fliigel schwach angeraucht, Subcostalis von der Costalis entfernt, Basalis

so lang wie ihr Abstand vom Stigma, welches schmal, 2—3-mal so lang wie breit und

am Grund weiss ist, Radialis stark bogig, dreimal so lang wie die Basalis, Postmarginalis

der Radialis gleich, Nervulus von der Basalis distal entfernt, aiussere Submedianzelle

hinten offen. Vordere Femora miissig verdickt, hintere Tibien allmiihlich verdickt, vor

der Spitze ventral plétzlich ausgerandet. Abdomen eirund, gewélbt, kiirzer, als der

Thorax, 2. Tergit vorn, beiderseits, lateral mit einem kreisrunden Griibchen. Liinge :

4 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate about 800 feet, X. 1908—

mero09, 1 ¢.

9. Dissomphalus saxatilis, n. sp.

d. Schwarz; Mandibeln, die zwei ersten Antennenglieder, Coxee und Beine hellgelb.

Kopf und Thorax matt oder schwach schimmernd, mit wenig dichten und oberflichigen

Punkten ; Kopf etwas liinger als breit, Augen behaart, um 4 linger als ihr Abstand vom

Hinterrand des Kopfes, Mandibeln linealformig, mit 3—4 Ziihnen. Antennenglieder 2—12

nicht linger als dick, 13. linger. Thorax wie bei voriger Art, Mediansegment so lang

wie breit, lederartig, Mittellingsleiste nicht durchlaufend, Seiten nicht glatt. Fliigel

wie bei voriger Art, Postmarginalis aber nur halb so lang wie die Radialis, Nervulus

mit der Basalis zusammenstossend, weisse Linien wie bei Pristocera crucifera, jedoch

SECOND SERIES—ZOOLOGY, VOL. XV. 7

50 PERCY SLADEN TRUST EXPEDITION

ist der Stiel der Gabel durch eine Querader mit der fusseren Submedianzelle ver-

bunden. Hintere Tibien ohne Ausschnitt. Abdomen flach gedriickt, so lang wie der

Thorax; 2. Tergit mit eimem Wiirzchen beiderseits vorn. Linge: 2 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1000 feet, and in

the forest above, up to over 1000 ft., 6 ¢ (mostly I. and II. 1909).

ScLERoDERMA Klug, Latr. Consid. géner. 1810, p. 314.

10. Scleroderma seychellensis, n. sp.

@. Roétlichgelb, distale Hilfte der Antennen dunkel, Kopf und Abdomen, ausge-

nommen das 1. oder die 2 ersten Tergite, braun bis schwarzbraun. Kopf viereckig, um

die Hilfte linger als breit, fein chagrinirt, mit zerstreuten Punkten; Augen fast punkt-

formig, so lang wie die Wange, 4 des Abstandes vom Hinterrand des Kopfes erreichend ;

Ocellen fehlend. Antennenglieder 3—13 so dick wie lang. Thorax kaum breiter als die

halbe Breite des Kopfes oder des Abdomens, glatt und glinzend; Pronotum langlich,

Mesonotum eirund, Mediansegment doppelt so lang wie breit, gleichbreit, vorn bogig

ausgeschnitten, hinten nicht abgestutzt sondern abgerundet. Fliigel fehlend. Alle

Tibien unbedornt. Abdomen lang gestreckt, hinten allmihlich zugespitzt. Linge:

2—3 mm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons Plateau and jungle

near by, VIII.—IX. 1908, 2 ¢; near Mont Pot-ai-eau, about 1500 feet, VIII. 1908, 1 2.

Ill. Ceraphronide.

CerapPHron Jurine, Nouv. méth. class. Hym. 1807, p. 303.

11. Ceraphron saxatilis, n. sp.

g. Rot; Antennen schwarzbraun, ausgenommen der Grund des 1. Gliedes, eine

Mittelliingsbinde auf dem Mesonotum, Scutellum und hintere Hiilfte des Abdomen

schwarz. Kopf und Thorax schimmernd und ziemlich glatt, Kopf breiter als der Thorax,

Augen dreimal so lang wie die Wangen, Stirn mit einem ziemlich grossen aber wenig

tiefen Eindruck iiber den Antennen. Scapus dicker proximal als distal, 2. Glied fast

kuglig, 3. linger als das 4., welches dreimal so lang wie dick ist, 10. noch iiber doppelt

so lang wie dick, kiirzer als das 11. Hinterer Abschnitt des Scutellum dreimal so lang

wie die vorderen, die Furchen des Frenums stossen winkelig zusammen in einiger

Entfernung vom Vorderrand. Fliigel glashell, Radialis dreimal so lang wie die Margi-

nalis. Abdomen so hoch wie breit, keglig, vorn gestreift. Liinge: 1,5 mm.

Vorkommen. Seychellen-Inseln. Mahé: marshes on coastal plain at Anse aux

Pins and Anse Royale, 12.—21. I. 1909, 1 @.

Conostiamus Dahlbom, Ofv. Svensk. Akad. Férh. xiv. 1857, p- 289.

12. Conostigmus seychellensis, n. sp.

$. Schwarz; Scapus und Beine mit Ausnahme der Coxe lehmgelb. Kopf und

Thorax schimmernd, kaum chagrinirt ; Kopf etwas breiter als der Thorax, Augen sehr

kurz behaart, Ocellen ein Dreieck bildend, Stirn ohne Eindruck. Scapus walzenrund,

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA Byll

kaum oberhalb der Augenbasis entspringend, wenigstens so lang wie die zwei folgenden

Glieder zusammen, 2. Glied fast kuglig, die folgenden walzenrund und kurz abstehend

behaart, 3. 3—4-mal so lang wie dick, 4.—11. 2—3-mal so lang wie dick. Furchen des

Frenum wenig vor dem Vorderrand des Scutellum winkelig zusammenstossend, hinterer

Abschnitt des Scutellum linglich und fast flach. Fliigel glashell, Distalende der

Subcostalis verdickt, Stigma halbelliptisch, Radialis 14-mal so lang wie das Stigma.

Abdomen kaum kiirzer als der Thorax, dorsal etwas flach gedriickt, am Vorderrand des 1.

Tergites gestreift. Linge: 2 mm.

Vorkommen. Seychellen-Inseln. Silhouette: low coconut-planted country near the

coast, Pointe Etienne, 17. IX. 1908, 1 #.

IV. Scelionide. A. Telenomine.

TELENomuS Haliday, Entom. Mag. i. 1833, p. 271.

13. Telenomus seychellensis, n. sp.

$?. Schwarz; Mandibeln, Scapus und Beine, ausgenommen die Coxe, dottergelb.

Kopf breiter als der Thorax, hinten abgestutzt, glatt und glinzend, von oben und von

vorn gesehen quer, Augen kahl, um ein Drittel linger als die Wangen, mit den Mandibeln

durch eine tiefe Furche verbunden, Stirneindruck tief, fast kreisrund, von dem medialen

Augenrand um seine ganze Breite entfernt, hintere Ocellen sowohl den Augenrand als

den Hinterrand des Kopfes beriihrend. Mandibeln am Ende dreizihnig, Ziihne stumpf.

Antennen des ? 11-gliedrig. Scapus fast walzenrund, so lang wie die 4 folgenden Glieder

zusammen, 2. Glied 2—3-mal so lang wie dick, kaum dicker aber nicht linger als das 3.,

4. um die Hilfte linger als dick, 5. und 6. wenig linger als dick, Keule 5-gliedrig, ihre

Glieder nicht gedringt, nicht doppelt so dick wie die vorigen, so dick wie lang, ausgenom-

men das keglige Endglied. Antennen des ¢ 12-gliedrig, feinhaarig, 2.—5. Glied wenig

linger als dick, das 2. umgekehrt keglig, 3—5. walzenrund, 6.—11. fast kuglig, 12.

linglich. Maxillarpalpen 2-gliedrig, beide Glieder liinglich, Labialpalpen aus einem

linglichen Glied bestehend. Thorax stark gewélbt, wenigstens so hoch wie lang, dorsal

fein behaart und kaum merklich chagrinirt, Mesonotum quer, ohne Parapsidenfurchen,

Scutellum halbkreisférmig. Fliigel glashell, Marginalis punktformig, Stigmaticalis schriig,

lang, am Ende knopfférmig, Postmarginalis doppelt so lang wie die Stigmaticalis. Ab-

domen des ? kurz, so lang wie der Thorax, eirund, 1. Tergit ringférmig und gestreift, 2.

fast bis zum Hinterende reichend, vorn gestreift, sonst glatt und gliinzend; Abdomen des

¢ kiirzer als der Thorax. Linge: 1—1,5 mm.

Vorkommen. Seychellen-Inseln. Silhouette : low coconut-planted country near the

coast, Pointe Etienne, 17. IX. 1908, 1 2; Mare aux Cochons, plateau and forest above,

IX. 1908, 22; near Mont Pot-d-eau, about 1500 feet, VIII. 1908, 1 9. Mahé: from

grass in cultivated country about 1000 feet, 2. XII. 1908, 1 9; Mare aux Cochons district,

1000—2000 feet, 26. I.—2. II. 1909, 10 2; Cascade Estate, 800—1500 feet, 1909,

S) Che See

7—2

52 PERCY SLADEN TRUST EXPEDITION

14. Telenomus myrmidon, n. sp.

4%. Schwarz; Grund des Scapus heller, Beine ausgenommen die Cox schmutzig-

weiss. Augen fein behaart. Das 2. Antennenglied des ? um die Hiilfte linger als dick,

3. kaum linger als dick, 4.—6. nicht liinger als dick. Antennen des ¢ wie bei voriger Art.

Abdomen in beiden Geschlechtern kiirzer als der Thorax, 2. Tergit nicht gestreift. Alles

iibrige wie bei voriger Art. Liinge: 0,8 mm.

Vorkommen, Seychellen-Inseln. Mahé: country above Port Glaud, about 500—

1000 feet, 5. XI. 1908, 1 9; Cascade Estate, about 800—1500 feet, X. 1908—III. 1909,

3 a5 OS,

15. Telenomus mahensis, n. sp.

$9. Schwarz; Mandibeln rot, Beine mit Ausnahme der Coxe, und Scapus des 2

lehmgelb, verdickter Teil der Femora und der Tibien des ¢ gebriiunt. Kopf und Thorax

matt und fein lederartig, Augen kahl. Maxillarpalpen 2-gliedrig, Labialpalpen aus 1

Glied bestehend, dieses nicht linger als dick, am Ende mit zwei oder drei kriiftigen

Borsten. Beim ¢ ist das 2. Antennenglied doppelt so lang wie dick, 3.—7. fast

walzenformig, das 7. etwas dicker als das 6,, Keule 4-gliedrig, die 3 ersten Glieder wenig

quer, das 4. eirund; an einer Antenne waren das 6. und 7. Glied zu einem einzigen

langlichen Glied verwachsen. Beim ¢ ist das 2. Glied kuglig, 3. und 4. dreimal so lang

wie dick, die folgenden allmiihlich verkiirzt, das 11. noch deutlicher linger als dick, kiirzer

als das 12. Fliigel glashell, Geiider wie bei vorigen Arten. Abdomen linglich, so lang

wie der tibrige Kérper, 1. Tergit gestreift, doppelt so breit wie lang, 2. am Grunde

gestreift, 1}-mal so lang wie breit, die Mitte des Abdomen weit iiberragend, die 4 oder 5

folgenden Tergite sehr kurz, allmihlich schmaler werdend, Bohrer lang vorstehend.

Linge: 0,8—1 mm.

Vorkommen. Seychellen-Inseln. Mahé: country above Port Glaud, about 500—

1000 feet, 5. XI. 1908, 1 2; Mare aux Cochons district, about 1500 feet, 26. I.—2. II.

1909, 1 2; Cascade Estate, 800—1500 feet, 1909, 1 9.

B. Beine.

Baus Haliday, Entom. Mag. 1. 1833, p. 270.

16. Baus curvatus, n. sp.

?. Schwarz; Gesicht vorn briiunlich, Antennen, Coxe und Beine gelb, Distalende

der Antennenkeule dunkler. Kérper glatt, glinzend, dorsal vom Vorderende des Kopfes

bis zum Hinterende des Abdomen bogig gewélbt. Kopf viel breiter als der Thorax,

etwas quer, hinten bogenférmig ausgeschnitten, Ocellen fehlend, Augen kahl, doppelt so

lang wie die Wangen, fast den Hinterrand des Kopfes erreichend, Scheitel und Stirn

gewolbt. Antennen wie bei Beus castaneus. Thorax quer, durch eine wenig deutliche,

kaum hinter der Mitte befindliche Naht in zwei Teile geteilt. Fliigel fehlend. Abdomen

etwas breiter als der Thorax, so lang wie der iibrige Kérper, am Grunde so breit wie in

der Mitte und von der Dorsalfliche des Thorax nur durch eine feine Naht getrennt.

Lange: 0,8 mm.

Vorkommen. Seychellen-Inseln. Silhouette: high country near Mont Pot-a-eau,

VR 1908 ee

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 53

ParaBa&us, n. g. (Plate 2, fig. 3).

Wie bei Beus sind die Antennen 7-ghiedrig, der Thorax ohne Scutellum, das Abdomen

seitlich schneidig und das 1. Tergit reicht fast bis zum Hinterende des Abdomen; von

Beus unterscheidet sich aber Parabeus durch die Antennenkeule, welche aus 4 verwach-

senen Gliedern besteht, durch den nicht bogig gekriimmten Kérper, durch das deutliche

Pronotum und durch das Abdomen, welches nicht blos durch eine Naht von der

Dorsalfliiche des Thorax getrennt ist. Die Type ist:

17. Parabeus ruficornis, n. sp. (Plate 2, fig. 3).

2. Schwarz, schimmernd ; Antennen, Coxze und Beine rot. Kopf so breit wie das

Abdomen, etwas quer, gew6lbt, hinten kaum bogig ausgeschnitten, nicht gerandet, Scheitel

und Stirn dicht punktiert, Augen kahl, den Hinterrand des Kopfes fast erreichend, Ocellen

ein Dreieck bildend, die hinteren berithren den Augenrand. Scapus liinger als die 5

folgenden Glieder zusammen, 2. Antennenglied wenigstens doppelt so lang wie dick, 3., 5.

und 6. kuglig oder etwas quer, 4. ziemlich walzenrund, wenig linger als dick, das 7. bildet

eine grosse, dicke, spitz eirunde Keule, welche durch drei schrage, wenig deutliche Niihte

in 4 Glieder geteilt ist. Thorax etwas liinger als hoch, schmaler als der Kopf, fast

walzenrund, noch feiner punktiert als der Kopf, im vorderen Viertel durch eine quere,

mitten winkelige Naht in einen Prothorax und in einen Mesothorax geteilt, Scutellum,

Metanotum und Mediansegment, sowie die Fliigel fehlend. Femora gekeult, hintere

Tarsen wenigstens so lang wie die Tibien. Abdomen so lang wie der iibrige K6rper, glatt,

glinzend, dorsal etwas flach gedriickt, ventral weniger, elliptisch, Seitenrand schneidig, 1.

Tergit die 4 vorderen .Fiinftel des Abdomen einnehmend, die 3 oder 4 folgenden Tergite

sehr kurz. Liinge: 0,9 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1500 feet, 1909,

iss

Creratopmus Ashmead, Bull. U.S. Nat. Mus. P. 45, 1893, p. 175.

18. Ceratobeus insularis, n. sp.

?. Schwarz; Antennen und 1. Segment des Abdomen ausgenommen das Horn,

gelb, Beine lehmgelb, Coxze und Femora schwarzbraun. Kopf und Thorax schimmernd

und fein lederartig ; Kopf etwas breiter als der Thorax, Augen kah]. Das 2. Antennen-

glied ist dick, umgekehrt keglig, 14-mal so lang wie dick, 3.—6. sehr schmal, kuglig

oder quer, Keule spitz ellipsoidal, so lang wie die 5 vorigen Glieder zusammen, ohne Spur

einer Teilung. Thorax etwas hdher als lang, stark gewolbt, ohne Parapsidenfurchen,

Metanotum ohne Ziihne, senkrecht abfallend, wie auch das Mediansegment. Fliigel

glashell, Marginalis in Gestalt eines dicken Punktes, Postmarginalis fehlend, Stigmaticalis

schrig, lang, am Ende geknépft. Abdomen, flach gedriickt, spindelférmig, etwas linger

als der iibrige Kérper, viel tiefer als die Fliche des Mesonotum liegend, 1. Tergit

gestreift, mit einem schriig nach vorn gerichteten Horn, welches liinger als dick ist

und die Fliiche des Mesonotum kaum iiberragt, 2. Tergit in der vorderen Hiilfte gestreift,

54 PERCY SLADEN TRUST EXPEDITION

3. am lingsten, glatt und gliinzend, wie die folgenden, 4.—7. Glied ein Dreieck bildend,

welches etwas linger als breit ist. Linge: 1 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1500 feet, 1909, 1 9.

OponTacoLus, n. g. (Plate 2, fig. 4).

Von Ceratobeus durch das zweiziihnige Metanotum, den linglichen Kopf, die

Anwesenheit einer Postmarginalis und das anders gestaltete Horn des 1. Tergites zu

unterscheiden. Die Type ist:

19. Odontacolus longiceps, n. sp. (Plate 2, fig. 4).

°. Kopf schwarz, Mandibeln lehmgelb, Scapus und Antennenkeule schmutzigweiss,

2.—6. Antennenglied braun, Thorax braun, dorsal dunkler, Coxee, Beine and Abdomen

gelb, Tergite seitlich braun, das Horn hellgelb. Kopf breiter als der Thorax, von oben

gesehen sehr quer, von vorn gesehen linger als breit, hinten bogig ausgeschnitten, glatt

und glinzend, Augen fein behaart, den Hinterrand des Kopfes erreichend, so lang wie

die Wangen, mit der Mandibel durch eine Furche verbunden, Stirn ohne Eindruck,

Ocellen ein Dreieck bildend, die hinteren beriihren fast den Augenrand. Palpen nicht

vorstehend. Scapus walzenrund, 2. Glied fast doppelt so lang wie dick, dicker als

die folgenden, 3. so lang wie dick, 4.—6. quer, 3.—6. sehr schmal, Keule spitz ellip-

soidal, ohne Spur einer Teilung, so lang wie die 5 vorigen Glieder zusammen. Thorax

wenig linger als hoch, Pronotum von oben kaum sichtbar, hinten bogig ausgeschnitten,

Mesonotum gewolbt, quer, ohne Parapsidenfurchen und, sowie das Scutellum fein

punktiert, Scutellum quer, hinten abgerundet, Metanotum mit 2 dreieckigen Zihnen,

die um mehr als ihre Breite voneinander abstehen. Fliigel schwach getriibt, kurz

bewimpert, Subcostalis den Vorderrand fast beriihrend, Marginalis punktformig, Stigma-

ticalis schrag, lang, am Ende knopfférmig, Postmarginalis so lang wie die Stigmaticalis,

Vorderrand nicht bewimpert, nur fein behaart. Abdomen flach gedriickt, lang elliptisch,

Seitenrand schneidig, 1. Tergit mit eimem senkrechten, walzentormigen Horn, welches

hdher als dick ist, hinter dem Horn lingsgestreift, 2. Tergit nur vorn gestreift, sonst

glatt und glinzend, wie die folgenden, allmihlich breiter, etwas kiirzer als das 3.,

welches das liingste ist, die folgenden sehr kurz. Linge: 1,5 mm.

Vorkommen. Seychellen-Inseln. Mahé: low country, 1 §.

Aco.oipes Howard, Insect Life ii. 1890, p. 269.

20. Acoloides wnicolor, n. sp.

@. Ganz blassgelb, nur die Augen und die Ocellen schwarz. Kopf viel breiter

als der Thorax, von vorn gesehen etwas quer, von oben gesehen doppelt so breit wie

lang, hinten bogig ausgeschnitten, glatt und glinzend, Augen fein behaart, kaum

linger als die Wangen, Ocellen ein Dreieck bildend, die hinteren beriihren fast die

Augen, Scheitel doppelt so breit wie ein Auge, 2. Antennenglied dicker als die fol-

genden, doppelt so lang wie dick, 3.—6. sehr diinn, 3. so lang wie dick, 4.—6. kuglig

oder quer, Keule linger als die 4 vorigen Glieder zusammen, spitz ellipsoidal, ohne

Spur einer Teilung. Pronotum sehr schmal, hinten bogig ausgeschnitten, Mesonotum

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 55

und Scutellum glatt, schimmernd, Parapsidenfurchen fehlend, Mediansegment quer,

viereckig, kiirzer aber wenigstens so breit wie das Scutellum. Fliigel angeraucht,

proximale Hiilfte glashell, Nahe der Stigmaticalis dunkler und fast eine Querbinde

bildend, Vorder- und Hinterrand lang bewimpert, Subcostalis vom Vorderrand entfernt,

Marginalis einen dicken Punkt bildend, Stigmaticalis lang, schriig, am Ende knopf-

formig, Postmarginalis und Basalis fehlend, Vorderrand bis zur Marginalis lang

bewimpert. Petiolus walzenférmig, etwas linger als dick, gestreift, ein Drittel der

Breite des 2. Tergites erreichend; Abdomen wenig linger als breit, fast kreisrund,

so breit wie der Thorax, glatt und glinzend, flach gedriickt, Seitenrand schneidig.

Linge: 0,8 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1500 feet, 1909, 1 .

Acotus Forster, Hymen. Stud. 11. 1856, pp. 100 & 102.

Kopi math und fom lederartig......5.....0.+<0..2sesseseeesee se 21. A. zonatus, n. sp.

apr glatttmnd: olamzend, ...h<ie.. 5. ..n.4ssesneeseentanseny 22. A. lucidiceps, n. sp.

21. Acolus zonatus, n. sp.

$2. Schwarz; Beine lehmgelb, die Coxze ausgenommen, Femora gebriunt, Man-

dibeln rot, Scapus des ¢ und Antennen des ? briunlichgelb, 1. Segment des Abdomen

gelb. Kopf wenig breiter als der Thorax, matt und fein lederartig, hinten schwach

bogenférmig ausgeschnitten, Augen fein behaart, etwas linger als die Wangen, mit

den Mandibeln durch ee Furche verbunden, Mandibeln fast bis zur Mitte dreispaltig,

die Lappen zugespitzt. Maxillarpalpen zweigliedrig, Labialpalpen aus einem warzen-

formigen Gliede bestehend. Antennen des ? 7-gliedrig, 2. und 3. Glied linger als

dick, 4.—6. kuglig oder quer, Keule so lang wie die 5 vorigen Glieder zusammen,

ohne Spur einer Teilung, ellipsoidal. Scapus des ¢ so lang wie die drei folgenden

Glieder zusammen, 2. und 3. Glied fast gleich, 14-mal so lang wie dick, 4.—11. kuglig,

12. keglig, fast doppelt so lang wie dick. Thorax so lang wie hoch, matt oder

schimmernd, fein chagrinirt, ohne Parapsidenfurchen. Fliigel schwach getriibt, Marginalis

einen dicken Punkt darstellend, Postmarginalis fehlend, Stigmaticalis lang, schriig, am

Ende knopfartig verdickt und von einem briiunlichen Streifen durchkreuzt. Abdomen

flach gedriickt, eirund, hinten breit abgerundet, 1. Tergit wenig breiter als lang, fein

lingsgestreift, 2. nach hinten allmihlich breiter werdend, vorn gestreift, hinten, sowie

die folgenden Tergite, fein lederartig, 3. am lingsten. Liinge: 0,8—1 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1500 feet, 1909,

wel &.

22. Acolus lucidiceps, un. sp.

o?. Schwarz; Mandibeln rot, beim ¢ sind der Scapus, das 1. Tergit und die

Beine lehmgelb, mit Ausnahme der Coxe, beim ? sind die Antennen und die Beine,

ausgenommen die Coxe, braungelb. Kopf glatt und stark gliinzend, nicht breiter als

der Thorax. Beim ¢ ist das 3. Antennenglied nicht linger als dick, das 2. ein wenig

56 PERCY SLADEN TRUST EXPEDITION

linger als dick. Fliigel ohne braunen Streifen. Abdomen fast kreisrund, 1. Tergit

stark quer. Alles tibrige wie bei voriger Art. Liinge: 0,8 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1500 feet, 1909,

Tees Dee OF

C. Scelionine.

Hapronotus Forster, Hymen. Stud. i. 1856, pp. 101 & 105.

Korper ‘seb warz til. isiae.. cae. pepe te vo es scene coke ate vented 23. H. saxatilis, n. sp.

Korper rot, Kopf und hintere Halfte des Abdomens schwarz.........

24. H. festwus, n. sp.

23. Hadronotus saxatilis, n. sp.

$3. Schwarz; Mandibeln, Scapus, Kniee, Tibien und Tarsen lehmgelb, 2.—6.

Antennenglied des ? braun. Kéorper gedrungen. Kopf etwas breiter als der Thorax,

von oben gesehen quer, hinten bogig ausgeschnitten, von vorn gesehen so hoch wie

breit, matt und sehr fein lederartig, Augen kahl, um 4 liinger als die Wangen, mit

den Mandibeln durch eine Furche vereinigt, die hinteren sind vom Augenrand und

vom Hinterrand des Kopfes um ihren Durchmesser entfernt. Mandibeln gleichbreit,

am abgestutzten Ende dreizihnig, die Zihne stumpf und nicht liinger als dick. Maxillar-

palpen aus zwei linglichen Gledern zusammengesetzt, Labialpalpen aus 1 linglichen

Gliede bestehend*. Antennen 12-gliedrig; 2. Glied beim ¢ kuglig, 3. etwas linger als

dick, 4.—11. fast walzenrund, so dick wie lang, 12. liinglich, 5. nicht verdickt ; Scapus

des ? so lang wie die 6 folgenden Glieder zusammen, 3. Glied so lang wie das 2.,

aber schmaler, wenigstens doppelt so lang wie dick, 4. und 5. nicht linger als dick,

6. etwas verdickt, fast kuglig, 6.—12. gedriingt und eine spindelfo6rmige Keule bildend,

7.—11. Glied kaum quer, 6. und 12. wenigstens so lang wie dick. Thorax kaum

linger als hoch, vorn abgerundet und nicht abgestutzt, dorsal matt und grob lederartig,

Mesonotum gewolbt, stark quer, ohne Parapsidenfurchen, Scutellum quer, hinten ab-

gerundet. Fliigel glashell, Marginalis punktférmig, Postmarginalis 13-mal so lang wie

die Stigmaticalis, diese schriig, lang, am Ende geknépft. Abdomen kaum linger als

breit, fast im gleichen Niveau mit dem Mesonotum, matt, fein lederartig, Hinterrand

der Tergite glatt und gliinzend, Seitenrand schneidig, 1. Tergit gestreift, so lang wie

das 3., das 2. etwas linger als das 3., die 4 letzten sehr kurz. Linge: 1 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1500 feet, I.—III. —

1909, 9 , 6 9. Silhouette: Mare aux Cochons, plateau and near by, IX. 1908, 2 g, 1 9.

24. Hadronotus festivus, n. sp.

g. Rot; Kopf, Antennen und hintere Hilfte des Abdomen schwarz, Grund des

Scapus lehmgelb. Kopf und Thorax matt, fein behaart und fein chagrinirt, Kopf von

oben gesehen viel breiter als lang, von vorn gesehen wenig quer, etwas breiter als

der Thorax, hinten bogig ausgeschnitten, Augen kahl, etwas liinger als die Wangen,

* Nach Ashmead sind die Mandibeln bei Hadronotus 2-zihnig, die Maxillarpalpen 4-gliedrig und die

Labialpalpen 3-gliedrig.

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 57

hintere Ocellen von den Augen entfernt, Gesicht vorn und Wangen gestreift. Antennen

fein behaart, 1. Glied etwas kiirzer als die vier folgenden zusammen, 2. fast kuglig,

3. kaum linger als das 4., 3.—12. walzenrund, wenig linger als dick, das 5. kaum

verdickt. Thorax etwas liinger als hoch, Pronotum von oben kaum sichtbar, hinten

bogig ausgeschnitten, Mesonotum stark gew6lbt, quer, ohne Parapsidenfurchen, Scutellum

halbkreisformig, Metanotum und Mediansegment senkrecht abfallend. Fliigel glashell,

kurz bewimpert, Subcostalis den Vorderrand bildend, im distalen Drittel vom Vorderrand

entfernt, Marginalis einen dicken Punkt bildend, Stigmaticalis lang, schriég, am Ende

knopfférmig, halb so lang wie die Postmarginalis. Abdomen viel tiefer liegend als das

Mesonotum, flach gedriickt, sitzend, um die Hiilfte linger als breit, so breit wie der

Thorax, und fast so lang wie der tibrige Korper, 1. und 2. Tergit lingsgestreift, das 1.

mehr als doppelt so breit wie lang, das 2. ist das liingste und tiberragt wenig die

Mitte des Abdomen, die 4 folgenden glatt und allmihlich verktirzt, Seitenrand

schneidig. Linge: 1,2 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1500 feet, 1909, 1 2.

PstLoTELEIA Kieffer, Serphiden &c. von Madagaskar; in Voeltzkow, Reise in

Ostafrika, Vol. 2. 1910, p. 530.

25. Psilotelera atra, n. sp. (Text-fig. 1.)

$?. Schwarz; Mandibeln rot, Coxee, Beine und, beim ¢, der Scapus gelb, die

11 tibrigen Glieder braun, Antennen des ¢ briiunlich, Grund des Scapus gelb, Keule

schwarz. Kopf etwas quer, hinten abgerundet, nicht gerandet und nicht bogig ausge-

schnitten, Scheitel und Schliife matt, Stirn glatt und gliinzend, hintere Ocellen von

den Augen um ihren Durchmesser entfernt; die beiden Mandibeln am Ende in zwei

ungleichgrosse Zihne geteilt (Fig. 1). Maxillarpalpen aus 2 ling-

lichen Gliedern zusammengesetzt, Labialpalpen aus einem liinglichen

Glied bestehend, dieses am Ende mit drei kriiftigen Borsten. Scapus

des $ etwas linger als die zwei foleenden Glieder, 2.—5. Glied

24-mal so lang wie dick, das 5. in der Mitte zabnartig vorstehend,

6.—11. kaum doppelt so lang wie dick, 12. linger als das vor-

hergehende. Beim ? ist das 2. Antennenglied dicker als das 3.,

aber nicht linger, 3. doppelt so lang wie dick, 4. und 5. wenig

linger als dick, alle drei walzenrund, 6. und 7. kuglig, die 5 folgenden stark verdickt,

gedriinet, dreimal so breit wie lang, ausgenommen das kurze, keglige Endglied. Thorax

kaum schmaler als der Kopf, 14-mal so lang wie hoch, wenig gewélbt, glinzend und

fein punktiert, Pronotum von oben nicht sichtbar; Parapsidenfurchen durchlaufend

und divergirend, Scutellum quer, hinten abgerundet. Fliigel schwach getriibt, kurz

bewimpert, Subcostalis dem Vorderrand sehr geniihert, Marginalis kiirzer als die Stig-

maticalis, diese halb so lang wie die Postmarginalis, schriig, lang, am Ende knopfartig

verdickt ; Hinterfliigel mit 2 Frenalhiickchen. Abdomen spatelférmig, flach, so lang

wie der iibrige Kérper, 2—3-mal so lang wie breit, Tergite quer, ausgenommen das L.,

Fic. 1. Mandibel von

Psiloteleia atra, n. sp.

_ die beiden ersten gestreift, die 5 folgenden glatt und gliinzend, das 1. so lang wie

breit, etwas kiirzer als das 2., 3. das lingste, kiirzer als die zwei ersten zusammen,

SECOND SERIES—ZOOLOGY, VOL. XV. 8

58 PERCY SLADEN TRUST EXPEDITION

die 4 folgenden kurz, Hinterende beim 2 abgerundet, beim ¢ dreieckig, mit vorstehendem

Bohrer. Liinge: 1,8 mm. Kérper schlank.

Vorkommen. Seychellen-Inseln. Silhouette: near Mont Pot-d-eau, about 1500 feet,

VIII. 1908, 1 g, 1 ?. Mahé: Cascade Estate, about 800 feet or over, X. 1908—I.

ISXOS), IL ee

ORISCELIO, n. g. (Plate 2, fig. 6).

Dieses neue Genus ist von Scelio nur durch die Form des Scutellums zu unter-

scheiden.

26. Oriscelio seychellensis, n. sp. (Plate 2, fig. 6).

?. Schwarz; Mandibeln und Scapus braun, ventrale Seite des Scapus_heller,

Antennengleder 2.—6. und Beine, mit Ausnahme der Coxe, gelb. Kopf grob netz-

artig gerunzelt, Stirn mit emem glatten, gliinzenden, oben bogigen und gerandeten

Eindruck, der den medialen Augenrand fast beriihrt und die Mitte der Augen erreicht ;

Augen kahl, doppelt so lang wie die Wangen, mit der Mandibel durch eime Furche

vereinigt ; Mandibeln lang, am Ende mit 2 spitzen Zihnen. Maxillarpalpen 3-gliedrig,

1. Glied das lingste, 2. das kiirzeste, wenig linger als dick, Labialpalpen 2-gliedrig,

beide Glieder fast doppelt so lang wie dick. Das 2. Antennenglied ist wenig linger

als dick, 3. etwas kiirzer als das 2., 4.—6. quer und gleichdiinn, die 6 folgenden

bilden eine abgesetzte Keule, deren 1. Glied das lingste ist, die 4 folgenden doppelt

so breit wie lang. Thorax dorsal mit groben, netzartig verzweigten Liingsrunzeln ;

Prothorax vorn abgestutzt, Schultern rechtwinkelig; Parapsidenfurchen fehlend ; Scu-

tellum so lang wie breit, Hinterrand zweilappig, mit einem bogenférmigen, wenig

tiefen Ausschnitt ; Mediansegment so breit wie der Thorax an den Tegule, Hinter-

ecken mit einem spitzen Zahn; Pleuren gerunzelt. Fliigel kaum getriibt, Subcostalis

von der Costalis entfernt, Stigma kreisrund, fast punktformig, den Vorderrand nicht

erreichend, Stigmaticalis braun, kaum schriig, am Ende knopff6rmig verdickt, Radius

durch eine Spur angedeutet. Beine ziemlich kahl. Abdomen gleichbreit, mit 6 queren

und grob lingsfestreiften Tergiten, Zwischenriiume der Liingsstreifen gerunzelt, schmaler

Hinterrand der Tergite glatt, 2. Tergit kaum linger als das 1. oder als das 3., das 1.

so breit wie das 2.; Sternite fast glatt. Liinge: 3,5 mm.

Vorkommen. Seychellen-Inseln. Silhouette: high country near Mont Pot-a-eau,

VIII. 1908, 1 2; Mare aux Cochons and forest above, IX. 1908, 2 ¢. Mahé: high

damp forest at summit of Pilot, over 2000 feet, X.—XI. 1908, 1 $; high forest

near Morne Blanc, XI. 1908, 1 ?; from grass in cultivated country, about 1000 feet,

11. XII. 1908, 1 %; top of Mount Sebert, nearly 2000 feet, 16. I. 1909, 1 $; Mare

aux Cochons district, 1000—2000 feet, 26. I. 1909—2. II. 1909, 6 2; Cascade Estate,

about 1000 feet, I—III. 1909, 7 2; Cascade, cultivated country near sea-level, 20. I.

1909; 1 2.

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 59

ENNEASCELIO, n. g. (Plate 2, fig. 5).

Diese Gattung unterscheidet sich von Scelio nur durch die Gestalt des Prothorax

und durch die 9-gliedrige Antennenkeule, letzteres Merkmal kommt bei keiner anderen

Gattung vor, ausgenommen bei Roena Cam.

27. Enneascelio exaratus, n. sp. (Plate 2, fig. 5).

@. Glinzend schwarz; Femora schwarzbraun, Tibien und Tarsen braun, Troch-

anteren, Grund der Femora und der Tibien sowie die Gelenke der Tarsenglieder

weisslich oder gelblich. Kopf netzartig gerunzelt, hinter den Ocellen mit groben,

queren, bogigen Streifen, tiber den Antennen mit einer glatten, gliinzenden Stelle,

beiderseits dieser Stelle ist die Stirn grob fiicherartig gestreift; Augen kahl, doppelt

so lang wie die Wangen, mit der Mandibel durch eine Furche vereinigt ; Mandibel

zweizihnig. Das 2. Antennenglied fast doppelt so lang wie dick, 3. kaum linger

als das 2., die 9 folgenden dicht gedringt, quer, eine dicke, abgesetzte Keule bildend,

6.—11. Glied gleichdick, 2—3-mal so dick wie lang. Prothorax vorn nicht abgestutzt,

wie bei Scelio, aber allmiihlich halsartig verengt, hinten in der Mitte ist das Pronotum

oO?

Linie aus und trennt die Seiten des Pronotum von der halsartigen Einschniirung des

tief winkelig ausgeschnitten und kurz linienformig, eine schriige Leiste geht von dieser

Prothorax. Mesonotum mit durchlaufenden Liingsleisten, die seitlichen etwas veriistelt,

Zwischenriiume glatt und gliinzend, Parapsidenfurchen fehlend; Scutellum stark

gewolbt, netzartig gerunzelt oder fingerhutartig punktiert; Metanotum halbkreisformig,

fast lamellenartig ; Mediansegment unbedornt, lingsgerieft, jederseits mit einem dichten

silberweissen Haarfleck ; Pleuren gerunzelt, Propleuren oben glatt. Fliigel stark ange-

raucht, proximal gelblich, Subcostalis vom Vorderrand entfernt, Stigma fast dreieckig,

Stigmaticalis braun, kaum schriig, Radialis durch eine briiunliche Spur angedeutet,

4—5-mal so lang wie die Stigmaticalis, vor dem Rand aufhérend. Beine unbehaart.

Abdomen mit 6 queren Tergiten, die 5 ersten grob lingsgerieft, Zwischenriiume fein

chagrinirt und gliinzend, das 6. sehr klein, fingerhutartig punktiert, die 3 ersten

allmiihlich liinger und breiter, 4. kaum kiirzer als das 3.; 1. und 2. Sternit netz-

artig, die folgenden mitten glatt, seitlich gestreift, inr Vorderrand mit einer Querreihe

von Punkten. Linge: 6 mm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons Plateau and forest

above, IX. 1908, 2 9.

MacroreLe1A Westwood, Proc. Zool. Soc. London, ili. 1835, p. 70.

1. Das 4. Antennenglied des 2 wenigstens doppelt so lang wie dick,

das 5. um die Hiilfte liinger als dick .................. 29. M. mahensis, n. sp.

Das 4. Antennenglied des ? kaum linger als dick, 5. nicht linger

EM Pei esas As chink's,c'c sos ««'s 0Spcgh MMMM Nea Baan Te manent cde oeuet sa

2. Tergite 2—4 des $ doppelt so lang wie breit ......... 28. WM. versicolor, n. sp.

Tergite 2—4 des ? um ein Drittel linger als breit......30. MM. lavigena, n. sp.

8—2

60 PERCY SLADEN TRUST EXPEDITION

28. Macroteleia versicolor, n. sp. (Plate 3, fig. 7).

d?. Das g ist schwarz, 1. und 2. Antennenglied, Cox und Beine rotgelb ; ¢ rot,

Kopf und Antennen schwarz, ausgenommen die 2 ersten Glieder, welche gelb sind,

und die 3 folgenden, welche braun sind, Mesonotum, 1. Tergit und vorletztes, sowie

das letzte Segment schwarzbraun, Coxe und Beine blassrot. Kopf und Thorax schwach

feinhaarig, matt, mit missig groben und ziemlich dichten Punkten, Kopf kaum quer,

etwas breiter als der Thorax, hinten nicht gerandet sondern abgerundet, Augen kahl,

doppelt so lang wie die Wangen, mit der Mandibel durch eine Furche verbunden,

Stirn mit einem glatten, schmalen, nicht gerandeten Eindruck, welcher die Mitte der

Augen erreicht, hintere Ocellen den Augenrand beriihrend. Antennen 12-gliedrig,

Scapus beim ¢ fast so lang wie die 4 folgenden Glieder zusammen, 2. Glied doppelt

so lang wie dick, 3. linger als das 2., aber schmaler, 4. um 4} linger als dick, 5. nicht

linger als dick, 6. etwas quer und schwach verdickt, die 6 folgenden gleichdick, die

Keule bildend, gedringt, etwas quer, ausgenommen das eirunde Endglied; 2. Glied

beim ¢ kaum kiirzer als das 3., doppelt so lang wie dick, 3. walzenrund, schmaler

als das 2., 4.—11. kaum linger als dick, fast walzenrund, am Grunde abgerundet,

fein behaart, das 5. schwach verdickt, am Grunde etwas bogig, 12. liinglich. Thorax

dorsal fast flach, Pronotum mitten linienférmig, hinten tief winkelig ausgeschnitten ;

Mesonotum etwas linger als breit, Parapsidenfurchen durchlaufend, vorn divergirend ;

Scutellum quer, hinten abgerundet, Pleuren fast glatt und glinzend. Fliigel glashell,

beim ¢ die Mitte des Abdomen erreichend, kurz gewimpert, Marginalis um die Hiilfte

linger als die Stigmaticalis, Postmarginalis 24-mal so lang wie die Marginalis, Stig-

maticalis schriig, ziemlich lang, am Ende knotenférmig. Abdomen des ? 24-mal so

lang wie der tibrige Kérper, spindelformig, flach, mit 6 Tergiten, alle Tergite linglich,

grob lingsgestreift, Zwischenriume quergerunzelt, 5. und 6. Tergit schwicher gestreift,

die 3 vorderen Tergite allmiihlich verlingert, das 1. um die Hilfte linger als breit,

2.—4. doppelt so lang wie breit, 5. und 6. eine lange Spitze bildend, das 5. mehr

als 2-mal so lang wie breit, kiirzer als das 6., welches stark von der Seite zusammen-

gedriickt ist. Abdomen des $ doppelt so lang wie der iibrige Kérper, fast linealisch,

hinten verengt, mit 7 Tergiten, die 3 vorderen allmiihlich verliingert, das 1. kaum

linger als breit, 3. und 4. doppelt so lang wie breit, das 7. sehr kurz. Linge:

4—) mm.

Vorkommen. Seychellen-Inseln. Silhouette: low coconut-planted country near the

coast, Pointe Etienne, 17. IX. 1908, 1 ¢. Mahé: near Morne Blanc, 1 ?; from grass

in cultivated country, about 1000 feet, 11. XII. 1908, 2 %; Port Victoria, XII. 1908,

1 ¢; low country, 1 ¢; marshes on coastal plain at Anse aux Pins and Anse Royale,

19.—21. I. 1909, 1 ¢; Cascade, cultivated country near sea-level, 20. II. 1909, 2 3;

Cascade Estate, about 800—1000 feet, X. 1908—III. 1909, 2 #4, 1 2; Mare aux Cochons

district, 1000—2000 feet, 26. I. 1909—2. II. 1909, 1 9.

29. Macroteleia mahensis, n. sp.

?. Gelbrot, Coxze und Beine heller, die 6 distalen Antennenglieder, breiter Seiten-

rand des Mesonotum, Metanotum, Mediansegment und Abdomen schwarz. Kopf und

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 61

Thorax wie bei voriger Art, Mandibeln gleich, mit drei schwarzen Zihnen. Scapus kaum

linger als die zwei folgenden Glieder, 3. Glied dreimal so lang wie dick, etwas linger als

das 2., 4. dem 2. gleich, wenigstens doppelt so lang wie dick, 5. um die Hilfte linger

als dick, 6. so dick wie lang, Keulenglieder gedriingt und quer, ausgenommen das

Endglied. Hinterrand des Scutellum mit einer Punktreihe. Fliigel glashell, das

Endviertel des Abdomen erreichend, Postmarginalis fast doppelt so lang wie die

Marginalis, sonst wie bei voriger Art. Abdomen spindelférmig, doppelt so lang wie der

iibrige Kérper, flach, netzartig gerunzelt oder fingerhutartig punktiert, ausgenommen das

lingsgestreifte 1. Tergit, die 3 ersten Tergite etwas linger als breit, 4. so lang wie breit,

5. und 6. eine Spitze bildend, das 5. etwas quer, das 6. liinger als das 5. und stark

seitlich zusammengedriickt. Linge: 3,5 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1000 feet, I. 1909, 2 9.

30. Macroteleia flavigena, n. sp.

?. Schwarz, vorderer Teil der Stirne, Wangen, vordere Hilfte der Schliifen, Mandi-

beln, Scapus, Coxze und Beine gelb, Sternum und Pleuren briiunlich, Abdomen dorsal

braun bis braunschwarz. Kopf und Thorax matt und punktiert, gestaltet wie bei voriger

Art; 3. Antennenglied schmaler als das 2., walzenrund, wenigstens doppelt so lang wie

dick, 4. kaum linger als dick, 5. nicht linger als dick, 6. etwas quer, Keule wie bei

vorigen Arten. Fliigel glashell, das Enddrittel des Abdomen erreichend, Marginalis um

die Hiilfte linger als die Stigmaticalis, Postmarginalis um die Hiilfte linger als die

Marginalis. Abdomen spindelférmig, schmaler als der Thorax, doppelt so lang wie der

iibrige Kérper, dorsal lingsgerunzelt und netzartig, 1. und 5. Tergit kaum linger als

breit, 2.—4. um 3 linger als breit, 6. linger als das 5., eine stark seitlich zusammenge-

driickte Spitze darstellend. Linge: 3,5 mm.

Vorkommen. Seychellen-Inseln. Mahé: marshes on coastal plain at Anse aux Pins

and Anse Royale, 19.—21. I. 1909, 1 2; Cascade, cultivated country near sea-level,

20. II. 1909, 9 3.

NEUROTELEIA, n. g. (Plate 3, fig. 8).

Dieses Genus unterscheidet sich von allen iibrigen Scelioniden durch das Geiider,

welches vollstiindig ist.

Antennen des $ mit einer sechsgliedrigen Keule ............ 31. N. rufa, n. sp.

Antennen des ? ohne deutliche Keule .................. 32. N. heterocera, n. sp.

31. Neuroteleia rufa, n. sp. (Plate 3, fig. 8).

S?. Rot; Kopf ausgenommen die Unterseite und Keule der Antennen des ¢

schwarz ; 2.—6. Antennenglied des ? und Flagellum des $ schwarzbraun, die zwei ersten

Antennenglieder sowie die Coxe und Beine lehmgelb beim ¢. Kopf fast viereckig, kaum

quer, ziemlich dicht punktiert, Augen kahl, doppelt so lang wie die Wangen, Stirn hinter

den Antennen gestreift, ohne Eindruck, hintere Ocellen den Augenrand fast beriihrend,

Hinterrand des Kopfes nicht gerandet. Scapus des ? kaum liinger als die zwei folgenden

Glieder zusammen, 3. Glied so lang wie das 2., wenigstens doppelt so lang wie dick,

62 PERCY SLADEN TRUST EXPEDITION

4. kaum linger als dick, 5. nicht linger als dick, 6. etwas quer, Keule 6-gliedrig, fast

walzenrund, ihre Glieder etwas quer und gedriingt, nur das Endglied eirund. Scapus des

g fast so lang wie die 2 folgenden Glieder zusammen, 3. und 4. Glied mehr als doppelt so

lang wie dick, 5. zweimal, 2. und 6.—12. fast zweimal so lang wie dick, alle walzenformig

und fein behaart. Thorax schwach gewoélbt, doppelt so lang wie hoch; Pronotum von

oben kaum sichtbar, tief winkelig ausgeschnitten ; Mesonotum langlich, ohne Parapsiden-

furchen, ziemlich dicht punktiert, wie das Scutellum, dieses quer, hinten abgerundet :

Metanotum mit 2 fein behaarten, am Grunde zusammenstossenden, dreieckigen Zihnen ;

Propleuren mit 2 von der Tegula bis zur vorderen Coxa reichenden Leisten, welche ein

elliptisches Feld einschhessen. Fliigel schwach angeraucht, mit vollstiindigem Geader,

nimlich Subcostalis, Marginalis, Postmarginalis, Radialis, Recurrens, Stigmaticalis, Basalis

und Medialis; Basalis etwas liinger als ihr Abstand von der Marginalis, diese

punktformig, Stigmaticalis lang, schrig und bogig, Postmarginalis kaum linger als die

Stigmaticalis, Radialis lang, schrig nach dem Vorderrand laufend und diesen nicht erreich-

end, doppelt so lang wie die Stigmaticalis; Recurrens so lang wie die Stigmaticalis, die

Richtung der Radialis fortsetzend, Discoidalis und distaler Teil der Cubitalis wenig

deutlich. Beine schlank. Abdomen des ? spindelférmig, linger als der iibrige Kérper,

glatt, glinzend, vorn mit einem kurzen Horn, 1. Tergit und vorderes Drittel des

2. Tergites lingsgestreift, die Streifen tief und sehr dicht, nur schwach schimmernd,

die 2 vorderen Tergite linger als breit, die folgenden etwas quer, die 3 ersten fast

gleichlang, die 3 letzten klein, 7. sehr kurz, kiirzer als das 6. Beim ¢@ ist das

Abdomen um die Hilfte linger als der iibrige Kérper, spatelformig, 1. und 2. Tergit

die vordere Hiilfte des Abdomen erreichend, liingsgestreift, 1. stielartig, fast doppelt so

lang wie dick, 2. liinglich, etwas liinger als das 4., 5.—7. sehr klein, 3.—7. glatt und

glinzend. Liinge: 2,5 mm.

Vorkommen. Seychellen-Inseln. Silhouette: forest above Mare aux Cochons, 2. IX.

1908, 19. Mahé: country above Port Glaud, about 500—1000 feet, 5. XI. 1908, 1 9;

slopes of Morne Seychellois, about 1500—2000 feet, 4. II. 1909, 1 2.

32. Neuroteleia heterocera, n. sp.

g. Rot; Kopf schwarz, unterseits heller, Antennen schwarzbraun, ausgenommen

der Grund des Scapus, Abdomen rotbraun. Scapus etwas linger als die zwei folgenden

Glieder zusammen, 2. Glied um die Hiilfte linger als dick, 3.—6. schmaler, walzenformig,

allmihlich verkiirzt, 3. doppelt so lang wie das 2., 4. dreimal so lang wie dick, 6. noch

14-mal, die sechs folgenden so lang wie dick, etwas gedriingter als die vorigen, aber nicht

dicker und keine Keule bildend. Ziihne des Metanotum um mehr als ihre Breite

voneinander abstehend. Marginalis halb so lang wie die Stigmaticalis, Postmarginalis

14-mal so lang wie die Marginalis. Das 7. Tergit liinglich, linger als das 6., fast griffel-

artig. Alles iibrige wie bei voriger Art. Linge: 2,8 mm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons, IX. 1908, 1 @.

IO i

KIEFFER—HY MENOPTERA, PROCTOTRU POIDEA 63

LAMPROTELEIA, n. g. (Plate 3, fig. 9).

Augen kahl. Antennen 12-gliedrig, beim ? mit einer 6-gliedrigen Keule. Margi-

nalis liinger als die Stigmatica, Postmarginalis fehlend. Abdomen spindelférmig, 1.

Mande

P4 ~

Zos Ng

f <\

5 a 6 (2 mew ‘a

7 mit einem Hocker.

Tergit i: LIBRARY

Parapsidenfurchen durchlaufend ..................cec00 33. LD. fasciatipennis, n. sp. ~—s

imarapsidenturchen fellend. 2.5... ce cass. <0 ceeaeeess sone sncdesioess 34. L. pulchripennis. bp go: “4

33. Lamproteleia fasciatipennis, n. sp. (Plate 3, fig. 9).

?. Rot; Antennen, ausgenommen die 5 Endglieder, welche schwarz sind, Coxe,

Beine und Abdomen gelb, Horn des 1. Tergites rot, 2. Tergit mit je einem grossen

schwarzen Fleck, Hinterende des 3. Segmentes und 4.—6. Segment schwarz, 7. Segment

rot. Kopf doppelt so breit wie lang, glatt, gliinzend, Scheitel und Stirn gew6lbt, ohne

Eindruck iiber den Antennen, Augen kahl, um } linger als die Wangen, mit der

Mandibel durch eine Furche verbunden, Ocellen ein Dreieck bildend, die hinteren sind

um ihren Durechmesser von den Augen entfernt. Antennen 12-gliedrig, Scapus so lang

wie die 3 folgenden Glieder zusammen, 2.—4. Glied ziemlich gleich, walzenrund, fast

doppelt so lang wie dick, 5. etwas linger als dick, 6. so dick wie lang, 7. quer, etwas

verdickt, die 5 folgenden noch dicker und quer, ausgenommen das Endglied. Pronotum

kaum sichtbar von oben, hinten tief winkelig ausgeschnitten ; Mesonotum und Scutellum

glatt und quer, Parapsidenfurchen durchlaufend, Scutellum quer, hinten abgerundet,

Metanotum und Mediansegment unbewehrt. Fliigel bis zum hinteren Drittel des Ab-

domens reichend, kurz bewimpert, glashell, ausgenommen das distale Drittel und eine

breite, durchlaufende Querbinde, welche angeraucht sind, die Binde erstreckt sich von der

Basalis bis zur Marginalis; Marginalis linger als die Stigmaticalis, diese schriig, wenig

lang, am Ende knopftérmig, Postmarginalis fehlend, Basalis durch eine Spur angedeutet ;

hintere Fliigel geftirbt wie die vorderen. Abdomen flach gedriickt, spindelférmig, etwas

linger als der tibrige Kérper, fein chagrinirt und kaum merklich lingsgestreift ; 1. Tergit

linglich, stielartig, vorn mit einer schwachen, hécker artigen Erhebung, 2. Tergit etwas

quer, 3. so lang wie breit, 4.—6. stark quer, 7. schmal, schwiicher depress, fast griffelartig,

linger als das 6. Liinge: 1,8 mm.

Vorkommen. Seychellen-Inseln. Mahé: Anonyme Island, 9. I. 1909, 1 9.

34. Lamproteleia pulchripennis, n. sp.

?. Rot; Kopf und Thorax dorsal braun, Mesosternum dunkler braun, die 5 distalen

Glieder der Antennen, Horn des 1. Tergites und hintere Hiilfte des Abdomen, sowie ein

Fleck an beiden Seiten des 2. Tergites schwarz, die 7 ersten Antennenglieder und vordere

Hialfte des Abdomen gelb. Antennen mit einer 4- oder 5-gliedrigen Keule, 2. Antennen-

glied 14-mal so lang wie dick, 3. kaum linger als dick, 4.—6. nicht linger als dick,

7. quer und etwas verdickt, aber schmaler als die 4 folgenden, diese gleichdick, quer und

zierolich gedringt. Parapsidenfurchen fehlend. Geiider und Firbung der Fliigel wie bei

voriger. Abdomen ziemlich glatt, Hicker héher als dick. Alles iibrige wie bei voriger

Art. Liinge: 1,8 mm.

Vorkommen. Seychellen-Inseln. Silhouette: near Mont Pot-d-eau, about 1500

feet, VIII. 1908, 1 9.

64 PERCY SLADEN TRUST EXPEDITION

Baryconus Forster, Hymen. Stud. II. 1856, pp. 101 & 104.

35. Baryconus calopterus, n. sp.

?. Schwarz; Mandibeln, Antennen ausgenommen die 5 Endglieder, Coxee, Beine

und Petiolus mit Ausnahme des Horns, gelb. Kopf quer, doppelt so breit wie lang, matt

oder schwach schimmernd, chagrinirt, hinten abgerundet, nicht gerandet und nicht bogig

ausgeschnitten, Stirn ohne Eindruck, gewélbt, Augen kahl, doppelt so lang wie die

Wangen, mit der Mandibel durch eine Furche verbunden, hintere Ocellen den Augenrand

fast beriihrend. Scapus wenigstens so lang wie die 5 folgenden Glieder zusammen, 2.

und 3. Glied wenigstens 13-mal so lang wie dick, 4.—6. quer, Keule ziemlich dick, fast

walzenformig, ihre Glieder sehr gedriingt und stark quer, nur das letzte keglig und so

lang wie dick. Thorax etwas liinger als hoch, wenig gewélbt, schimmernd und kaum

chagrinirt, vorn abgerundet, Pronotum von oben nicht sichtbar, Mesonotum kaum gewélbt,

ohne Parapsidenfurchen, Scutellum quer, hinten abgerundet. Fliigel weisslich vom

Grunde bis zum Knopf der Stigmaticalis, von da bis zur Spitze dunkel, eine sehr

schmale, bogig nach aussen gekriimmte, durchlaufende, dunkle Querbinde miindet in das

Distalende der Subcostalis, letztere vom Vorderrand kaum getrennt, Marginalis kiirzer als

die Stigmaticalis, diese lang, schriig, am Ende knopfférmig, halb so lang wie die Post-

marginalis. Abdomen flach gedriickt, spindelf6rmig, etwas linger als der iibrige K6rper,

1. und 2. Tergit lingsgestreift, die folgenden gliinzend und sehr fein chagrinirt, 1. Tergit

linger als breit, mit einem schriigen Horn, welches linger als dick ist, 2. Tergit etwas

linger als das 1., etwas kiirzer als das 3., beide quer, die 3 oder 4 folgenden allmihlich

verkiirzt ; Seitenriinder schneidig. Linge: 1,8 mm.

Vorkommen. Seychellen-Inseln. Mahé: Mare aux Cochons district, 1000—2000

feet, 26. I. 1909—2. II. 1909, 1 2.

Paratrimorus Kieffer, Ann. Soc. Sci. Bruxelles, 32 Mém., 1908, p. 146.

36. Paratrimorus atriceps, n. sp. (Text-fig. 2.)

@. Kopf und Antennenkeule schwarz, Mandibeln rot, 1. und 2. Glied der Antennen,

Coxe und Beine gelb, 3.—6. Antennenglied briiunlich bis braun,

Thorax und Abdomen braunrot. Kopf kaum breiter als der

Thorax, um die Hiilfte breiter als lang, fein chagrinirt, schim-

mernd, hinten abgerundet, nicht gerandet und nicht ausgeschnitten,

Augen kahl, Wangen gestreift, Stirneindruck tief, nicht gerandet,

bis zur Hiilfte der Augen reichend breiter als sein Abstand vom

medialen Augenrand, Ocellen ein gleichseitiges Dreieck bildend,

die hinteren den Augenrand beriihrend. Beide Mandibeln drei- Fig. 2. Maxillarpalpus und

spaltig, die Lappen spitz, gleichlang, fast die Mitte erreichend. Labialpalpen (yaaa

Maxillarpalpen 3-gliedrig, 1. Glied keulenformig, fast so lang wie

die 2 folgenden zusammen, 2. quer, 3. doppelt so lang wie dick; Labialpalpen mit 2

gleichlangen Gliedern (Fig. 2). Scapus linger als die 5 folgenden Glieder zusammen,

2. Glied dicker und liinger als das 3., beide doppelt so lang wie dick, 4.—6. kuglig, Keule

sehr dick, 3—4-mal so dick wie die vorigen Glieder, fast doppelt so lang wie die 5

trimorus atriceps, 2. sp.

;

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 65

vorigen zusammen, ihre 6 Glieder so dicht gedriingt, dass eine Gliederung nur unter

starker Vergrésserung sichtbar wird, die 5 ersten 3-mal so lang wie dick, das 6. kurz

keglig. Thorax umgekehrt eirund, vorn abgerundet, kaum linger als hoch, schimmernd und

fein chagrinirt oder punktirt, Pronotum von oben nicht sichtbar, Mesonotum stark gewolbt,

quer, Parapsidenfurchen bald deutlich, bald nur durch Spuren angedeutet, Scutellum quer,

hinten abgerundet, vom Mesonotum durch eine Kerbfurche getrennt, am Hinterrand mit

einer Punktreihe, Metanotum mit einem kleinem Dorn. Fliigel kaum getriibt, kurz

bewimpert, Subcostalis vom Vorderrand entfernt, Marginalis breit, fast viereckig, Post-

marginalis fehlend, Stigmaticalis lang, schriig, am Ende knopfférmig, Basalis fehlend.

Abdomen flach gedriickt, eirund, kaum linger als der Thorax, Seitenrand scharf schneidig,

1. und 2. Tergit lingsgestreift, die folgenden glatt und gliinzend, das 1. etwas breiter

als lang, 2. allmiblich verbreitert, 3. linger als die 2 ersten zusammen, 4.—7. sehr kurz.

Linge: 1,8 mm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons, plateau and near

by, IX. 1908, 2 9. Mahé: high damp forest at summit of Pilot, over 2000 feet, X.—XI.

m908; 1 2.

PARANTERIS, n. g. (Plate 3, fig. 10).

Augen behaart. Antennen 12-gliedrig, beim ° mit einer 6-gliedrigen Keule. Man-

dibeln 3-ziihnig. Maxillarpalpen 3-gliedrig, Labialpalpen 2-gliedrig. Marginalis fast

punktformig, Postmarginalis fehlend oder nicht linger als die Stigmaticalis, diese schriig,

lang, am Ende knopfartig. Abdomen spindelférmig oder spatelformig, etwas linger als

der iibrige Kérper, 1. Tergit linger als breit, vorn mit einem Hocker beim 9.

1. Postmarginalis fehlend, 3.—11. Antennenglied des ¢ 3—4-mal so lang

Ge aMROLE Meh oe a OPE ta a ES to a oldie o s < dv.aie o's 6:00: oe oo occa tee wae 2.

Postmarginalis etwa so lang wie die Stigmaticalis, 3.—11. Antennen-

Guedrdesss nicht langor als: dick ..........:.sdseneseders Udewecsesdenstevsvscuses 5.

2. Antennen des $ weisslichgelb, ausgenommen die 2 ersten Glieder ......

as ocoitigumabtorstens 39. P. flaviclava, n. sp.

Antennen des ? schwarzbraun oder braunlichgelb ................ssseeeeseeeeee Be

3. Parapsidenfurchen deutlich, nur die 2 ersten Tergite gestreift ............

oa Se sees ees 37. P. nigriclava, n. sp.

Parapsidenfurchen fehlend oder undeutlich, die 3 ersten oder alle

Serf PaCS INCI Grats cas ob Love vosieon cs: doe d satan edand edeicrs ovnceynviens 4,

4. Die 2 ersten Tergite grob gestreift, die folgenden fein gestreift.........

sscsccecduvecsesedO. L. NIGraliceps, D. Sp.

Die 2 ersten Tergite grob gestreift, das 3. fein gestreift, die folgenden

IEE Ge clan e sca aucun) ssscsesesssssecerncncsetitnecsnanSe, ©. StPIQtigend, D. sp.

5. Keulenglieder der Antennen deutlich getrennt............... 40. P. nitidiceps, n. sp.

Keule nur bei starker Vergrésserung als gegliedert erscheinend .........

4 a sles slaammnnanectin 41. P. densiclava, n. sp.

SECOND SERIES—ZOOLOGY, VOL. XV. 9

66 PERCY SLADEN TRUST EXPEDITION

37. Paranteris nigriclava, n. sp.

49. Rot; Antennen schwarz oder schwarzbraun, Scapus des ¢ ventral wenigstens

am Grunde lehmgelb. Kopf und Mesonotum deutlich chagrinirt, mit zerstreuten, ziem-

lich groben Punkten. Kopf etwas quer, ohne Stirneindruck, hinten nicht gerandet,

abgerundet, Augen fein behaart, etwas mehr als doppelt so lang wie die Wangen, diese

gestreift, vom Gesicht durch eine Furche getrennt, hintere Ocellen von den Augen um

ihren Durchmesser getrennt, von der vorderen um ihren doppelten Durchmesser entfernt.

Mandibeln am Ende abgestutzt und mit drei kleinen, stumpfen Zihnen. Maxillarpalpen

mit drei linglichen Gliedern, Labialpalpen 2-gliedrig, 1. Glied langlich, das 2. umgekehrt

eirund, Antennen 12-gliedrig, Scapus des ¢ etwas linger als die zwei folgenden Glieder

12. walzenrund, fein behaart, 3—4-mal so lang wie

zusammen, 2. Glied fast kuglig, 3.

dick, das 5. am Grunde schwach ausgeschnitten ; Scapus des ? etwas linger als die drei

folgenden Glieder zusammen, 2. Glied 24-mal so lang wie dick, 3. und 4. fast 2-mal, 5.

und 6. nicht linger als dick, fast kuglig, die 6 folgenden verdickt, quer, dicht gedrangt,

eine Keule bildend, 1. und 6. Glied der Keule schmaler. Pronotum kaum sichtbar von

oben, hinten ausgeschnitten, Mesonotum quer, Parapsidenfurchen durchlaufend, divergi-

rend, Scutellum quer, hinten abgerundet, Metanotum und Mediansegment unbewehrt.

Fliigel schwach getriibt, Basalis durch eine Spur angedeutet, schriig, von der Marginalis

nicht um ihre Linge entfernt, Marginalis fast punktformig, Postmarginalis fehlend,

Stigmaticalis lang, schriig, am Ende knopfformig. Abdomen spatelformig, etwas langer

als der tibrige Kérper, flach, Seitenrand schneidig, 1. Tergit stielartig, etwas linger als

breit, liingsgestreift wie das 2., beim ? mit einer schwarzen, glatten, héckerartigen Erhe-

bung; 2. Tergit allmiihlich breiter werdend ; die folgenden Tergite glatt und glanzend,

das 3. so lang wie das 2., 5.—7. beim ¢ sehr kurz, eine dreieckige Spitze bildend, beim ¢

ist das 7. Tergit nicht sichtbar und das Abdomen hinten abgerundet. Lange: 2,5 mm.

Vorkommen. Seychellen-Inseln. Silhouette: near Mont Pot-a-eau, about 1500 feet,

VIII. 1908, 2 2; Mare aux Cochons and forest near by, IX. 1908, 5 ¢; low coconut-

planted country near the coast, Pointe Etienne, 17. [X. 1908, 1 2. Mahé: near Morne

Blanc, X. 1908, 2 ¢; Mare aux Cochons district, 1000—2000 feet, 26. I. 1909—2. II.

1909, 4 ¢, 38 2; scrubby forest vegetation, top of Mount Sebert, 1800 feet or more, I.

1909, 12%. Feélicité: from forest, 14—17. XII. 1908, 1 9.

38. Paranteris nigraticeps, n. sp. (Plate 3, fig. 10).

39. Kopf und Thorax, oftmals noch das Abdomen schwarzbraun, oder nur der Kopf

schwarz; Antennen beim @? briiunlichgelb, mit schwarzer Keule, beim g$ schwarzbraun ;

Mandibeln, Coxe and Beine gelb; Parapsidenfurchen undeutlich; 1. und 2. Tergit grob

lingsgestreift, die folgenden sehr fein gestreift. Sonst wie bei voriger. Linge: 2,5 mm.

Vorkommen. Seychellen-Inseln. Silhouette: near Mont Pot-i-eau, about 1500

feet, VIII. 1908, 1 2, 1 2; Mare aux Cochons plateau and forest above, IX. 1908, 5 3, 29;

low coconut-planted country near the coast, Point Etienne, 17. [X. 1908, 1 ¢. Mahé:

near Morne Blanc, X. 1908, 1 ¢; high forest of Morne Blane and Pilot, XI. 1908, 1 2;

Cascade Estate, about 800 feet, and forest 1—2000 feet, X. 1908—II. 1909,.5 @; forest

near Mount Harrison, 1700 feet, 2. III. 1909, 4 g, 3 2.

_—

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 67

39. Paranteris flaviclava, n. sp.

?. Rot, matt oder schimmernd; 1. und 2. Antennenglied schwarzbraun, die itbrigen

weisslichgelb. Kopf und Thorax sehr fein punktiert oder chagrinirt. Wangen ohne

deutliche Streifen, nur mit der gewéhnlichen Furche; hintere Ocellen von den Augen

sowie von der vorderen Ocelle um ihren Durchmesser entfernt. Sonst wie bei P. nigri-

clava. Liinge: 2,4 mm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons, IX. 1908, 1 9;

near Mont Pot-a-eau, about 1500 feet, VIII. 1908, 1 9. Mahé: forest near Mount

Harrison, 1700 feet, 2. III. 1909, 1 9.

40. Paranteris nitidiceps, n. sp.

é. Rot; Kopf schwarz, Antennen braunschwarz, Grund des 1. Gliedes lehmgelb,

2. Glied blass, Coxe und Beine gelb. Kopf glatt und gliinzend, Thorax gliinzend, fast

glatt, Parapsidenfurchen wenig deutlich. Antennenglieder 3.—12. walzenrund, nicht

oder kaum linger als dick, das 5. am Grunde schwach ausgerandet. Postmarginalis

vorhanden, so lang wie die Stigmaticalis. Alles iibrige wie bei P. nigriclava. Linge :

1,8—2 mm.

Vorkommen. Seychellen-Inseln. Mahé: near Morne Blanc, X. 1908, 3 2.

41. Paranteris densiclava, n. sp.

?. Rotbraun ; Kopf und Antennenkeule schwarz, die iibrigen Glieder der Antennen

braun, Thorax dorsal dunkelbraun und fein behaart, Kopf quer, breiter als der Thorax,

hinten bogig ausgeschnitten, glinzend, fast glatt, Augen fein behaart, hintere Ocellen vom

Augenrand entfernt, Stirn ohne Eindruck. Das 2. Antennenglied 14-mal so lang wie dick,

3. wenig liinger als dick, 4.—6. kuglig, Keule spindelférmig, ihre Glieder stark quer und

so dicht gedriingt, dass die Keule nur bei starker Vergrésserung als gegliedert erscheint.

Thorax so lang wie hoch, glinzend und fast glatt, Pronotum von oben kaum sichtbar,

hinten bogig ausgeschnitten, Parapsidenfurchen fehlend, Scutellum quer, hinten abgerundet,

Metanotum und Mediansegment senkrecht. Fliigel rauchig, am Grunde heller, mit Spur

einer Basalis, Subcostalis vom Vorderrand entfernt, Marginalis punktformig, Stigmaticalis

schriig, lang, am Ende knopfférmig, wenig linger als die Postmarginalis. Abdomen kaum

so lang wie der iibrige Korper, flach, fast eirund, 1. und 2. Tergit lingsgestreift, die

folgenden glatt und gliinzend, das 1. nach hinten allmiiblich verbreitert, etwas linger als

breit, am Grunde héckerartig vorstehend, 2. quer, 3. das lingste aber noch quer, die

folgenden sehr kurz. Liinge: 1,5 mm.

Vorkommen. Seychellen-Inseln. Mahé: scrubby forest vegetation, top of Mount

Sebert, 1800 feet or more, I. 1909, 1 9.

42. Paranteris striatigena, n. sp.

9. Schwarz; Mandibeln, Antennen ausgenommen die Keule, Coxze und Beine rot.

Kopf doppelt so breit wie lang, gliinzend, fein punktiert, hinten abgerundet, nicht aus-

geschnitten und nicht gerandet, Augen fein behaart, hintere Ocellen vom Augenrand um

etwas mehr als ihren Durchmesser entfernt, Stirn ohne Eindruck, gewélbt, mit einer

_Liingsleiste tiber dem Mund, Wangen halb so lang wie die Augen, gestreift, eine Furche

9—2

68 PERCY SLADEN TRUST EXPEDITION

verbindet die Mandibel mit dem Augengrund. Scapus fast so lang wie die 5 folgenden

Glieder zusammen, 2. Glied kaum kiirzer als das 3., dieses doppelt so lang wie dick,

walzenformig wie das 4., dieses wenig linger als dick, 5. und 6. schmaler, kuglig, die

6 letzten bilden eine dicke, fast walzenférmige Keule, sehr gedringt, 2—3-mal so dick

wie lang, ausgenommen das Endglied, welches keglig ist und so lang wie dick. Thorax so

breit wie der Kopf, etwas liinger als hoch, vorn abgerundet, glinzend und fein punktiert,

Pronotum von oben nicht sichtbar, Parapsidenfurchen fehlend, Scutellum quer, hinten

abgerundet, am Vorderrand und am Hinterrand von einer Kerblinie begrenzt. Fliigel

schwach gebriiunt, kurz bewimpert, Subcostalis vom Vorderrand entfernt, Marginalis

punktformig, Postmarginalis fehlend, Stigmaticalis lang, schriig, am Ende knopfférmig.

Abdomen etwas linger als der iibrige Kérper, so breit wie der Thorax, spindelformig und

flach, die 2 ersten Tergite grob gestreift, das 3. feiner gestreift, die foloenden fein und

wenig dicht punktiert, das 1. am Grunde héckerartig vorstehend, das 2. etwas linger als

das 1., kaum kiirzer als das 3., beide quer, die 3 oder 4 folgenden kurz; Seitenrand

schneidig. Linge: 2 mm.

Vorkommen. Seychellen-Inseln. Silhouette: near Mont Pot-d-eau, about 1500 feet,

VIII. 1908, 1 2.

V. Diapriide.

ScHizopria, n. g. (Plate 3, fig. 11).

Antennen des 2 12-gliedrig; Scutellum vorn mit einem Griibchen; Fliigel an der

Spitze ausgeschnitten.

Die Diapriiden-Genera mit ausgerandeten Fliigeln unterscheiden sich wie folgt :

1. Amtennen des 9 12-chiedrig rr sceewnscsc.0<0. ssno ress suarmeaeras sehen 2.

Antennmen des 9 13-gliedrig: cepuemictcnc.cooce eases sonsaiees delpan sen meee ae

2. Sentellam: ohne Gritbeheniiesseseieee sacs +0se-n-c-eeramaseeees Adeliopria, Ashm.

Scutellum vorn mit’ emem |Griibchen: .........0.-2csscen-eceese Schizopria, n. g.

3. Scutellum ohne Griibchen......... Entomopria, n. g. (Sp. typ.: solida, Thoms.)

Scutellum vorn mit einem Griibchem ......./2cas.cetsececsesce¥ eee Entomacis, Forst.

Die zwei Schizopria-Arten unterscheiden sich leicht voneinander :

1. Keule der Antennen braun, 1-gliedrig...........-.-.++++++++ 43. S. fallax, n. sp.

Keule der Antennen gelb, 6-gliedrig ...........:..::000+5 44, S. flaviclava, n. sp.

43. Schizopria fullax, n. sp. (Plate 3, fig. 11).

g. Schwarz; Antennen braun, Scapus, Coxee und Beine blassrot, Mandibeln, Meta-

thorax oder der ganze Thorax und Petiolus rot. Glatt und glinzend. Kopf kuglig,

ohne Haarfilz, Augen kabl, etwas linger als die Wangen, diese ohne Furche, Mandibeln

zweiziihnig. Maxillarpalpen mit 5 kurzen Gliedern, Labialpalpen 3-gliedrig, das 2. Glied

quer. Antennen der Augenmitte gegeniiber entspringend, 12-gliedrig, Scapus distal

keulenformig verdickt, so lang wie die 4 folgenden Glieder zusammen, 2. Glied etwas

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 69

linger und etwas dicker als die folgenden, doppelt so lang wie dick, die folgenden

allmihlich verkiirzt und verengt, in der distalen Hiilfte der Antenne sind die Glieder

fast kuglig, das 12. verdickt, eine Keule bildend, mehr als doppelt so lang wie das 11.,

ohne Spur einer Gliederung ; Borsten schrig und ziemlich lang. Thorax ohne Haarfilz,

so hoch wie lang, Pronotum von oben nicht sichtbar, Mesonotum quer, gewélbt, ohne

Parapsidenfurchen, Scutellum schwach gewélbt, vorn mit einer grossen Grube, Median-

segment mit einem Liingskiel. Fliigel schwach getriibt, am Ende herzférmig ausgeschnit-

ten, lang bewimpert, Subcostalis vom Vorderrand wenig entfernt, in denselben vor der

Fliigelmitte plétzlich miindend, Marginalis fast punktférmig, Stigmaticalis dick, schriig,

blass, 2—3-mal so lang wie die Marginalis, eine winkelige, wenig deutliche Querlinie

ersetzt die Basalis und die Discoidalis. Hintertibien viel linger als die Femora, in der

distalen Hiilfte plotzlich verdickt. Petiolus 1}-mal so lang wie dick, fast kahl, Abdomen

flach gedriickt, so lang wie der Thorax, 2. Tergit die vorderen # deckend, Analsegment

mit 2 gelblichen eingekriimmten Lappen, welche den Genitalien der ? iihneln. Liinge:

1,5 mm.

Vorkommen: Seychellen-Inseln. Silhouette: near Mont Pot-d-eau, about 1500 feet,

VIII. 1908, 2 9. Mahé: Mare aux Cochons district, 1000—2000 feet, 26. I. 1909—2. II.

1909, 1 2; Cascade Estate, about 1000 feet, II.—III. 1909, 2 3.

44. Schizopria flaviclava, n. sp.

?. Schwarz; Coxe und Beine gelb, Antennenkeule blassgelb, Metathorax und

Petiolus rotbraun. Das 3. Antennenglied etwas kiirzer und diinner als das 2., walzen-

rund, linglich, 3.—6. gleichdiinn, 5. und 6. wenig linger als dick, Keule 6-gliedrig, ihre

Glieder fast kuglig, allmihlich verdickt, das 11. von dem 12. wenig getrennt, beide dicker

als die vorigen, das 12. lang eirund. Sonst alles wie bei voriger Art. Liinge: 1,5 mm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons, [X. 1908, 1 9.

Entomacis Forster, Hymen. Stud. ii. 1856, pp. 121 & 123.

Antennenglieder 6—8 des ? 2-mal so lang wie dick ......... 45. E. longicornis, n. sp.

Antennenglieder 6—8 des ? fast kuglig wie die folgenden...

4s houemadaan 46. FE. curticornis, n. sp.

45. Entomacis longicornis, n. sp.

?. Schwarz; Scapus, Coxe und Beine gelb, Thorax, Petiolus und Grund des

2. Tergites rotbraun. Scapus proximal verengt, kiirzer als die 3 folgenden Glieder

zusammen, 2. Glied dick, kiirzer als das 3., 3.—5. gleichdiinn, das 3. dreimal so lang

wie dick, dem 4. gleich, 5. wenigstens doppelt so lang wie dick, die 8 folgenden allmiihlich

schwach verdickt, eine 8-gliedrige Keule bildend, 6. und 7. Glied wenigstens doppelt so

lang wie dick, 8. fast doppelt so lang wie dick, 9.—12. ziemlich kuglig, 13. lang ellipsoidal.

Parapsidenfurchen hinten sehr deutlich, vorn weniger. Petiolus fast 2-mal so lang wie

dick, Abdomen hinten abgerundet, ohne Anhiinge. Alles iibrige wie bei Schizopria.

Linge: 1,5 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1500 feet, I.—III.

1909, 2 2.

70 PERCY SLADEN TRUST EXPEDITION

46. Entomacis curticornis, n. sp.

39. Schwarz; Scapus, Coxe und Beine gelb; beim % sind der Metathorax und der

Petiolus rot. Antennen des ¢ fadenf6rmig, diinn, fein behaart, fast doppelt so lang wie

der Korper, 2. Glied wenig linger als dick, 3. walzenrund, etwas kiirzer als das 4., dieses

schwach bogig aber nicht verdickt, 4.—13. 3—4-mal so lang wie dick. Antennen des

? kurz, 3.—5. Glied diinn, kaum doppelt so lang wie dick, die 2 folgenden Keulenglieder

fast kuglig, ausgenommen das 13., welches lang eirund ist. Parapsidenfurchen deutlich,

fast durchlaufend, vorn undeutlich. Subcostalis den Vorderrand fast beriihrend, am Ende

nicht gebogen, Marginalis punktf6rmig, nicht verdickt, Stigmaticalis schriig, nicht ver-

dickt, Basalis und Discoidalis durch eine Spur einer winkeligen Linie angedeutet.

Petiolus fast doppelt so lang wie dick, Abdomen kiirzer als der Thorax, hinten abgestutzt.

Sonst wie Schizopria. Liinge: 1,2 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1500 feet, IL—III.

1909, 2 ¢; marshes on coastal plain at Anse aux Pins and Anse Royale, 19.—21. L

1909, 2 &.

Loxotropa Forster, Hymen. Stud. ii. 1856, pp. 122, 123, & 126.

TR OLa SCH WAEZ.. winikenicecsisiideeuio teehee Ree ewarasne xo se eee 47. L. exsul, n. sp.

Thorax: eotlich brawny. 5..21 io SsMseeeaeeeto se estes + Sonie's clone vasbide 48. L. semirufa, n. sp.

47. Loxotropa exsul, n. sp.

$9. Schwarz; Antennen des ? ausgenommen die Keule, Scapus des 2, Coxee, Beine

und Petiolus rot, Flagellum des ¢ braun. Schliife und Prothorax mit einem weissen

Haarfilz. Kopf kuglig. Scapus proximal verengt, beim ? so lang wie die 4 folgenden

Glieder zusammen, 2. Glied etwas dicker und etwas linger als das 3., dieses wenig

linger als dick, 3.—9. gleichdiinn, 4.—9. nicht linger als dick, 10.—12. eine abgesetzte,

gleichdicke Keule bildend, deren Glieder doppelt so dick wie die vorhergehenden, 11. etwas

quer; Scapus des $ so lang wie die 3 folgenden Glieder zusammen, 2. und 3. Glied nicht

linger als dick, 4.—14. etwas liinger als dick, das 4. verdickt, alle fein behaart. Scutellum

wenig gewolbt, vorn mit einem Griibchen. Fliigel glashell, Basalis senkrecht, den Vorder-

rand aber nicht erreichend, von der Marginalis proximal entfernt. Petiolus fein behaart,

14-mal so lang wie dick, Abdomen schwach depress, gestaltet wie gewéhnlich. Linge:

1,5—2,5 mm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons and forest near by,

IX. 1908, 1 3, 1 $. Mahé: slopes of Morne Seychellois, about 1500—2000 feet, 4. II.

1909, 1 2.

48. Loxotropa semirufa, n. sp.

g. Schwarz; die 4 oder 5 proximalen Antennenglieder, Thorax, Coxe, Beine und

Petiolus rot, die 7 oder 8 distalen Glieder der Antennen schwarzbraun. Antennen linger

als der Kérper, fein behaart, Scapus ziemlich walzenrund, fast so lang wie die 3 folgenden

Glieder zusammen, 2. und 3. Glied kaum linger als dick, 413. wenigstens um 4 linger

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 71

als dick, das 4. nicht verdickt, in der Mitte kaum vorstehend, das 14. liinglich. Stigmati-

ealis dreieckig, am abgestutzten Distalende mit einem kleinen senkrechten Nerv. Sonst

wie bei voriger. Liinge: 1,5 mm.

Vorkommen. Seychellen-Inseln, Silhouette: Mare aux Cochons, IX. 1908, 1 ¢.

RHopALopRiA, n. g. (Plate 3, fig. 12).

Scapus in der distalen Hiilfte plotzlich stark verdickt, doppelt so dick wie proximal.

Antennen des ¢ 14-gliedrig, mit abstehenden Haarwirteln, die des ¢ 12-ghedrig, mit einer

6-gliedrigen Keule. Sonst wie bei Diapria.

49. Rhopalopria vulgaris, n. sp. (Plate 3, fig. 12).

$9. Schwarz; proximale Hialfte des Scapus, Mandibeln, Coxze und Beine rot.

Schlife, Prothorax und Metapleuren mit einem schwachen Haarfilz, Petiolus noch

schwiicher behaart. Kopf kuglig, Augen kahl, Mandibeln zweilappig, Palpen weisslich

und kurz, die Maxillarpalpen 5-gliedrig, die Labialpalpen 2- oder 3-gliedrig. Scapus

des ¢ so lang wie die 3 folgenden Glieder zusammen, in der distalen Hiilfte doppelt so

dick wie in der proximalen, 2. Glied 1$-mal so lang wie dick, 3. walzenrund, fast doppelt

so lang wie das 2., 4. etwas kiirzer als das 3., stark bogig gekriimmt, distal verdickt, die

folgenden kurz eirund oder kuglig, 14. linglich, alle Flagellumglieder mit einem schwarzen

Haarwirtel, der nicht doppelt so lang wie die Dicke der Glieder ist ; Scapus des $ weniger

stark keulenformig, 3.—6. Glied diinner als das 2., gleichdiinn und allmihlich verkiirzt,

3. doppelt so lang wie dick, 6. nicht linger als dick, 7.—12. eine Keule bildend, ziemlich

kuglig, allmiihlich verdickt, die drei letzten gleichdick, das 12. eirund. Thorax linger als

hoch, Parapsidenfurchen fehlend, Scutellum wenig gew6lbt, vorn mit einem Griibchen,

Mediansegment mit einem Liingskeil. Fliigel glashell, lang bewimpert, Geiider wie bei

Diapria. Distales Drittel der Hintertibien plotzlich verdickt. Petiolus so dick wie lang,

Abdomen etwas depress, lang elliptisch, 2. Tergit vorn wie bei Spilomicrus. Linge:

1,5—2 nm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons, IX. 1908, 2 8.

Mahé: country above Port Glaud, about 500—1000 feet, 5. XI. 1908, 1 ¢, 1 2; Cascade

Estate, forest, 1000—2000 feet, I.—III. 1909, 5 2; Cascade, cultivated country near

sea-level, 20. II. 1909, 3 g, 1 2; marshes on coastal plain at Anse aux Pins and Anse

Royale, 19.—21. I. 1909, 1 ¢.

DrapriA Latreille, Préc. car. gén. Ins. 1. 1796, p. 110.

m Petiolus 3-mal so lang wie dick ..............ssssesseseses 50. D. seychellensis, n. sp.

Obs mal SOMANE WIG GICK: ....1..0606+.ccacneuemmensebancsasyaaseccsnesncees 2.

BE STAPOUMEMIKGUIC: F-PMOGTIG: J. io. .ces0s.sccescecesossceabduneebanssienswavudensteoncncss 8.

Menlo der Antennen S-gliedrig............scccsscscneuseoursese 53. D. sawatilis, n. sp.

3. Tergite 3

Tergite 3—8 des ? zusammen doppelt so lang wie die Breite des 3.......

8 des 2 zusammen so lang wie die Breite des 3....51. D. scotti, n, sp.

52. D. mahensis, n. sp.

72 PERCY SLADEN TRUST EXPEDITION

50. Diapria seychellensis, n. sp. (Plate 8, fig. 13).

a2. Schwarz; Coxee, Beine und Antennen rot, die 4 oder 5 Endglieder der Antennen

beim ? und die Knoten der Flagellumglieder des ¢ schwarz. Schlifen und Prothorax mit

weissem Haarfilz, Metapleuren und Petiolus nur fein behaart. Kopf kuglig, Scapus

walzenrund, schwach bogig, beim ? liinger als die 3 folgenden Glieder zusammen, 2. Glied

kiirzer als das 3., 3.—6. gleichdiinn, walzenrund, doppelt so lang wie dick, 7. kaum kiirzer

als das 6. und kaum dicker, 8.—12. allmiihlich verdickt, nicht linger als dick, das 11. so

dick wie das eirunde Endglied. Antennen des ¢ fast doppelt so lang wie der Kérper,

Scapus etwas kiirzer als die 3 folgenden Glieder zusammen, 2. Glied kuglig, 3. sitzend, in

der Mitte schwach verengt, mit 2 Haarwirteln, 4. etwas linger als das 3., nicht aus-

geschnitten und nicht gebogen, aus einem ellipsoidalen Knoten und einem langen Stiel

bestehend, letzterer wenigstens so lang wie der Knoten, der Haarwirtel 2—3-mal so lang

wie die Dicke des Gliedes ; die folgenden Glieder sind dem 4. gleich, aber der Petiolus ist

langer als der Knoten, an den letzten Gliedern jedoch kiirzer als der Knoten, 14. Glied

linglich. Thorax linger als hoch ; Scutellum bald nur gewoélbt, bald deutlich gekielt, vorn

mit einem oberfliichlichen Griibchen ; Mediansegment mit einem Lingskiel. Fliigel lang,

glashell, lang bewimpert, ohne Spur einer Basalis, Subcostalis und Marginalis wie bet

Dapria. Hintertibien im distalen Drittel plétzlich verdickt. Petiolus 3-mal so lang

wie dick, Abdomen lang elliptisch, etwas depress, 2. Tergit vorn vorstehend wie bei

Spilonicrus. Linge: 2—2,5 mm.

Vorkommen, Seychellen-Inseln. Silhouette: Mare aux Cochons, IX. 1908, 2 2, 2.

Mahé: high damp forest at summit of Pilot, over 2000 feet, X.—XI. 1908, 2 ¢; high

forest near Morne Blanc, XI. 1908, 1 2; Cascade Estate, about 1000 feet, 1909, 1 @.

51. Diapria scotti, n. sp.

$9. Schwarz; Coxee und Beine rotgelb, Antennen des #¢ mit Ausnahme der

4 Endglieder gelbrot, die des ¢ hellrot. Schliife und Prothorax mit weissem Haarfilz,

Metapleure und Petiolus nur feinhaarig. Kopf kuglig. Scapus proximal verengt, beim

? linger als die 3 folgenden Glieder zusammen, 2. Glied dicker als das 3., aber nicht

linger, 3.—7. gleichdiinn, 1}-mal so lang wie dick, walzenrund, 8.—12. eine Keule

bildend, nicht linger als dick, ausgenommen das eirunde Endglied, 8. schmaler als das

9., 9.—12. gleichdick. Antennen des ¢ etwas linger als der Kérper, 3. Glied lang

ellipsoidal und sitzend, 4.—13. ellipsoidal, mit sehr kurzem Stiel, das 14. langlich,

Haarwirtel doppelt so lang wie die Dicke der Glieder, 4. Glied weder gekriimmt noch

verdickt. Thorax so breit wie der Kopf; Scutellum gekielt, vorn mit einem Griibchen ;

Mediansegment mit einem Lingskiel. Fliigel lang, glashell, lang bewimpert, Marginalis

wie bei Diapria, etwas schrig, ohne Spur der Basalis. Petiolus 1}-mal so lang wie dick,

Abdomen flach gedriickt, 2. Tergit vorn gehoben wie bei Spilonucrus, 3.—8. Tergit beim

? ein Dreieck bildend, dieses so lang wie breit, beim ¢ ist das Abdomen hinten abgerundet.

Linge: 2,5 mm.

Vorkommen. Seychellen-Inseln. Silhouette: low coconut-planted country near the

coast, Point Etienne, 17. IX. 1908, 1 ¢& Mahé: near Morne Blane, 1908, 1 ¢; Cascade

Estate, about 800 feet or over, X. 1908—I. 1909, 1 9.

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 73

52. Diapria mahensis, n. sp.

@. Schwarz; Scapus rot, Flagellum schwarzbraun, Coxee und Beine gelb. An-

tennenglieder 2.—6. gleichdiinn, 14-mal so lang wie dick, 3.—6. walzenrund, Keule

5-gliedrig, 8.—10. allmihlich verdickt, 10.—12. gleichdick. Tergite 3—8 ein Dreieck

bildend, welches doppelt so lang wie breit ist. Sonst wie bei voriger Art. Lange: 2 mm.

Vorkommen. Seychellen-Inseln. Mahé: 1 9.

53. Diapria saxatilis, n. sp.

$?. Schwarz; Antennen, Coxze und Beine rot, ausgenommen die Keule des ? und

der Knoten der Flagellumglieder des g. Schliife und Prothorax mit weissem Haarfilz,

Metapleuren und Petiolus fein behaart. Kopf kuglig. Scapus etwas verengt am Grunde,

2. Glied dicker als die folgenden, 14-mal so lang wie dick, 3.—9. gleichdiinn, 3.—7.

walzenrund, liinger als dick, 8. und 9. kuglig; die 3 folgenden bilden eine abgesetzte

Keule, deren 1. Glied schmaler als das 2. und etwas linger als dick ist, 2. nicht linger als

dick, 3. eirund. Beim ¢ ist das 3. Glied walzenrund, so lang wie das 4., dieses schwach

gebogen, 4.—13. ellipsoidal und gestielt, Stiel zuerst 3 so lang wie das Glied, dann

allmihlich verkiirzt, 14. sitzend ; Haarwirtel 2—3-mal so lang wie die Dicke der Glieder.

Scutellum gekielt, vorn mit emmem Griibchen. Fliigel wie bei seychellensis, proximaler

Teil bis zur Marginalis unbehaart. Petiolus und Abdomen wie bei scott:. Linge:

2—2,5 mm.

Vorkommen. Seychellen-Inseln. Praslin: Cétes d’Or Estate, especially from Coco-

de-Mer forest in the Vallée de Mai, 28, 29. XI. 1908, 1 g. Silhouette: high country near

Pot-A-eau, VIII. 1908, 1 #, 1 9. Mahé: Cascade Estate, about 800 feet or over, X.

1908—I. 1909, 1 2; forest behind Trois Fréres, about 2000 feet, 14. I. 1909, 1 9.

CALOGALESUS, n. g.

Von Galesus zu unterscheiden durch den Mangel der Parapsidenfurchen, die 7-

gliedrige Keule der Antennen und das Geiider, welches aus einer Subcostalis, einer

Marginalis und einer Stigmaticalis besteht.

54. Calogalesus parvulus, n. sp.

9. Schwarz; Mandibeln, Antennen ausgenommen die Keule, Coxze und Beine gelb,

Thorax, Petiolus und hinteres Drittel des Abdomen rot. Kopf etwas linger als breit ;

von der Seite gesehen erscheint die dorsale Fliiche des Kopfes gewélbt, die ventrale

horizontal ; Mund zugespitzt, am Hinterrand des Kopfes befindlich, die Richtung der

Stirn fortsetzend und bis zu den vorderen Cox reichend; Ocellen dem Vorderrand des

Kopfes niher als dem Hinterrand; Vorderrand des Kopfes mit je einem Zahn, vor dem

die Stirn bis zur Lamelle fast senkrecht abfiillt, Stirnlamelle in 2 Lappen geteilt. Palpen

nicht vorstehend. Antennen 12-gliedrig, auf der Lamelle inserirt, Scapus proximal

verengt, so lang wie die 4 oder 5 folgenden Glieder zusammen, 2. Glied 14-mal so lang

wie dick, umgekehrt keglig, 3.—5. gleichdiinn, das 3. etwas linger als dick, 4. und 5.

nicht linger als dick, Keule stark abgesetzt und 7-gliedrig, ihre Glieder allmiihlich

verdickt und kuglig, ausgenommen das eirunde Endglied. Thorax linger als hoch,

-Prothorax mit schwachem Haarfilz, Scutellum fast flach, vorn mit 2 zusammenfliessenden

SECOND SERIES—ZOOLOGY, VOL. XV. 10

74 PERCY SLADEN TRUST EXPEDITION

Griibchen. Fliigel glashell, sehr lang bewimpert, Subcostalis, Marginalis und Stigmaticalis

glashell, erstere zuerst vom Vorderrand entfernt, dann den Vorderrand bildend, am Ende

etwas breiter, Stigmaticalis kaum schriig, breit, am Ende noch breiter. Hintertibien nicht

linger als die Femora, distales Drittel verdickt. Petiolus etwas gebogen, ziemlich kahl,

fast doppelt so lang wie dick, Abdomen von der Seite zusammengedriickt, linger als der

Thorax, schmal, das Enddrittel bildet einen spitzen und etwas eingekriimmten Kegel ;

Bohrer kaum vorstehend. Linge: 1 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, about 800 feet or over,

X. 1908—I. 1909, 1 ¢.

MICROGALESUS, n. g.

Von Galesus za unterscheiden durch den Mangel der Parapsidenfurchen, die

3-gliedrige Keule der Antennen und das Geiider, welches aus einer Subcostalis und aus

einer Marginalis besteht.

55. Microgalesus quadridens, n. sp.

?. Schwarz; Antennen mit Ausnahme der Keule, Coxe, Beine und Petiolus gelb,

Mandibeln rot, Thorax braun. Kopf linger als breit, glatt und gliinzend, wie der ganze

Kérper, Vorderrand bogig ausgeschnitten, jeder Lappen mit 2 nebeneinander stehenden

Dornchen, welche schwach bogig, nach hinten gekriimmt erscheinen; Ocellen dem

Vorderrand des Kopfes weit mehr als dem Hinterrand geniihert, Augen gross, Stirn

ausgehohlt, von der Seite gesehen schriig abfallend bis zu den Antennen, Gesicht von den

Antennen bis zum Mund dem Scheitel parallel, horizontal, Medianlinie stark gewélbt ;

Mandibeln am Hinterrand des Kopfes entspringend, wenig lang, parallel und die

wagerechte Richtung des Gesichtes fortsetzend, zugespitzt, am Grunde mit einem Zahn.

Palpen blass, Maxillarpalpen wenigstens 4-gliedrig, Labialpalpen wenigstens 2-gliedrig.

Scapus so lang wie die 5 folgenden Glieder zusammen, 2. Glied wenigstens doppelt so

lang wie dick, 3.—9. sehr diinn, das 3. kaum linger als dick, 4.—6. kuglig, 7.—9. quer ;

Keule stark abgesetzt, doppelt so dick wie die vorigen Glieder, ihre 2 ersten Glieder fast

quer, das 3. eirund. Thorax linger als hoch, Prothorax mit schwachem Haarfilz,

Mesonotum flach, Scutellum fast flach, vorn mit einem Griibchen. Fliigel behaart und

bewimpert, Geiider wie bei Diapria, Marginalis am Distalende mit einer kurzen Spitze

nach der Fliigelscheibe, ohne Spur einer Basalis. Petiolus kaum so lang wie dick,

Abdomen flach gedriickt, elliptisch, hinten abgerundet. Linge: 1 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1500 feet, 1909, 1 9.

VI. Belytide.

_Betyta Jurine, Nouv. méth. class. Hym., 1807, p. 311.

56. Belyta exsul, n. sp.

$9. Beim ¢ ist der Kopf schwarz, Thorax dunkelbraun bis schwarz, Abdomen

rotbraun, 1. und 2. Antennenglied, Tegule, Coxee und Beine gelbrot ; beim ? ist der Kopf

schwarzbraun, ventral rotbraun, der Thorax rotbraun bis schwarzbraun, das Abdomen

_gelbrot, Antennen, Coxee und Beine gelb. Kopf von der Seite gesehen hodher als lang

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 75

beim ¢, so lang wie hoch beim ?; Scapus walzenrund, beim % so lang wie das 3. Glied, 2.

Glied kuglig, 3. wenigstens 3-mal so lang wie dick, in der proximalen Hiilfte ausge-

schnitten, 4. etwas kiirzer als das 3., die folgenden allmihlich diinner werdend und kaum

kiirzer, 13. fast 3-mal so lang wie dick, kaum kiirzer als das 14.; Scapus des ¢ linger als

die 3 folgenden Glieder zusammen, 2. 14-mal so lang wie dick, 3. doppelt so lang wie dick,

die folgenden allmiihlich verdickt, quer, ausgenommen das eirunde 15. Glied. Thorax

breiter als hoch, Mediansegment hinten unbewehrt, Mittelliingsleiste fast vom Grunde aus

gespalten. Fliigel glashell, Basalis kiirzer als ihr Abstand von der Marginalis, Radialzelle

schmal, distal allmihlich erloschen, Marginalis linger als die Radialzelle, so lang wie die

Basalis, 3-mal so lang wie die schriige Stigmaticalis, Recurrens so lang wie die Marginalis,

nach dem Grunde der Basalis gerichtet, schwach ausgebildet. Petiolus gestreift, 24-mal

so lang wie dick; Abdomen ziemlich spindelférmig, schwach depress, hinten beim

eingekriimmt, 2. Tergit vorn nicht gestreift. Linge: 3 mm.

Vorkommen. Seychellen-Inseln. Silhouette : forest above Mare aux Cochons, 2. IX.

1908, 8 ¢. Mahé: near Morne Blane, X. 1908, 1 $; high forest of Morne Blanc, 24. X.

1908, 1 ¢; country above Port Glaud, about 500—1000 feet, 5. XI. 1908, 3 2; Cascade

Estate, 800—1000 feet, I —III. 1909, 6 #, 19. Praslin: Cotes d’Or Estate, especially

from Coco-de-Mer forest in the Vallée de Mai, 28. XI. 1908, 2 ¢.

Pantociis Forster, Hym. Stud. ii. 1856, pp. 129, 131 & 136.

mee onper schwarz, Petiolus restreift.............000-dsp-decesisomsteoressssennsnesaies 2

K6rper rot, Kopf schwarz, Petiolus glatt .................. 57. P. insulanus, n. sp.

2. Die 2 ersten Antennenglieder und das hintere Viertel des Abdomens

Brenna Merete pesos msn obs sisisoisce's ose a'ssalely nga 58. P. seychellensis, n. sp.

Antennenglieder 2.—5. gelbrot beim ?, Abdomen ganz schwarz

canes ce Res eee 59. P. scotti, n. sp.

57. Pantoclis insulanus, n. sp.

?. Rot; Kopf schwarz, Antennen distal allmaihlich dunkler, Coxze und Beine gelb.

Kopf von der Seite gesehen viel héher als lang. Scapus schlank, etwas gekriimmt, so lang

wie die 3 folgenden Glieder zusammen, 2. und 4. Glied etwas liinger als dick, 3. mehr als

doppelt so lang wie dick, 5.—14. kaum quer, 15. kurz eirund. Fliigel glashell, Basalis

_ kiirzer als ihr Abstand von der Marginalis, Stigmaticalis linger als die Marginalis, sehr

schriig, Radialzelle geschlossen, kaum doppelt so lang wie breit, von der Postmarginalis

nicht tiberragt, Recurrens nicht liinger als die Stigmaticalis, nach der Basalis gerichtet.

Petiolus kaum 2-mal so lang wie dick, glatt und walzenrund, Abdomen schwach depress,

spindelformig, 2. Tergit die zwei vorderen Drittel einnehmend, die 6 letzten Tergite kurz,

einen spitzen Kegel bildend, Bohrer lang vorstehend. Liinge: 2,5 mm.

| Vorkommen. Seychellen-Inseln. Silhouette: high forest above Mare aux Cochons,

IX. 1908, 1 9.

58. Pantoclis seychellensis, n. sp.

$9. Schwarz; Mandibeln, Palpen, 1. und 2. Antennenglied, Coxe, Beine und

hinteres Viertel des Abdomen gelbrot. Augen fein behaart. Scapus walzenrund, beim

10—2

76 PERCY SLADEN TRUST EXPEDITION

¢ 4-mal so lang wie das 2. Glied, dieses so dick wie lang, 3. kiirzer als der Scapus, 3-mal

so lang wie dick, am Grunde schwach ausgeschnitten, die folgenden allmiihlich verengt

und verkiirzt, das 13. dem 14. gleich, 3-mal so lang wie dick. Beim ? ist das 2.

Antennenglied liinger als dick, ein Viertel des Scapus erreichend, das 3. allmiahlich

verdickt, 3-mal so lang wie dick, 4. und 5. etwas liinger als dick, die folgenden schwach

verdickt und etwas quer, ausgenommen das eirunde Endglied. Fliigel schwach rauchig,

Basalis von der Marginalis um mehr als ihre Linge entfernt, Stigmaticalis sehr schriig,

wenigstens so lang wie die Marginalis, Radialzelle geschlossen, 2—3-mal so lang wie breit,

von der Postmarginalis etwas iiberragt, Recurrens der Stigmaticalis gleich, nach der

Basalis gerichtet. Petiolus gestreift, 2-mal so lang wie dick, Abdomen linglich, linger als

der Thorax, schwach depress, hinten beim ? eingekriimmt, beim ? keglig, mit vorragendem

Bohrer, 2. Tergit vorn gestreift. Liinge: 2,5—3 mm.

Vorkommen. Seychellen-Inseln. Silhouette: near Mont Pot-a-eau, about 1500 feet,

VIII. 1908, 1 3, 1 2; Mare aux Cochons, plateau and forest above, VITI—IX. 1908, 6 4,

5. Mahé: near Morne Blane, X. 1908, 2 2; country above Port Glaud, about 500—

1000 feet, 5. XI. 1908, 19; high damp forest between Trois Fréres and Morne Seychellois,

about 1500—2000 feet, 9. and 10. XIT. 1908, 1 #; Cascade Estate, forest above 1000 feet,

Hg sXoyey, ak a

59. Pantoclis scotti, n. sp.

&9. Schwarz; Coxee, Beine und, beim ?, 2.—5. Antennenglied gelbrot. Scapus des

¢ nur 3-mal so lang wie das 2. Glied, dieses kuglig, 3. Glied etwas linger als der Scapus,

am Grunde schwach ausgeschnitten, die folgenden kiirzer, allmiihlich verengt und verktirzt,

13. noch doppelt so lang wie dick; Scapus des ? 4-mal so lang wie das 2. Glied, dieses

etwas linger als dick, 3. so lang wie der Scapus, doppelt so lang wie das 4., welches 2-mal

so lang wie dick ist, 5. dem 4. gleich, die folgenden kaum dicker, allmihlich verkiirzat, die

letzten noch wenigstens so lang wie dick. Fliigel fast glashell, Stigmaticalis etwas ktirzer

als die Marginalis, sehr schriig, Radialzelle geschlossen, 2-mal so breit wie lang, von der

Postmarginalis nicht tiberragt, Recurrens so lang wie die Stigmaticalis, nach der Basalis

gerichtet. Petiolus gestreift, 14-mal so lang wie dick, Abdomen nicht linger als der

Thorax, fast spindelférmig, Bohrer lang vorragend; 2. Tergit vorn gestreift. Linge:

2—2,5 mm.

Vorkommen. Seychellen-Inseln. Silhouette: near Mont Pot-a-eau, about 1500 feet,

VIII. 1908, 1 2; Mare aux Cochons, plateau and forest above, VITI.—IX. 1908, 1 3, 12;

low coconut-planted country near the coast, Pointe Etienne, 17. TX. 1908s ee

Xenotoma Forster, Hym. Stud. 1. 1856, pp. 129, 130 & 137.

60. Xenotoma imsularis, n. sp.

$9. Schwarz; Mandibeln, Coxe und Beine rot, 1. und 2. Antennenglied lehmgelb

oder braun. Mandibeln lang und sich kreuzend. Antennen schlank, fadenformig, Scapus

4—5-mal so lang wie das 2. Glied, dieses linger als dick, 3. Glied beim ¢ 4-mal so lang

wie dick, schwach gekriimmt, die folgenden allmihlich verkiirzt, das 13. noch mehr als

doppelt so lang wie dick, dem 14. gleich; 3. Glied beim ? 3-mal so lang wie dick, die

folgenden allmiihlich verkiirzt, 14. noch fast 2-mal so lang wie dick. Fliigel fast glashell,

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA Hk

Marginalis halb so lang wie die Radialzelle, etwas linger als die Stigmaticalis, diese

senkrecht, Radialzelle 2—3-mal so lang wie breit, von der Postmarginalis nicht tiberragt,

Recurrens bogig, doppelt so lang wie die Stigmaticalis, nach der Discoidalis gerichtet.

Petiolus lederartig, 2—24-mal so lang wie dick, Abdomen bis zur Mitte allmihlich breiter

werdend, Linge: 2—2,5 mm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons and forest above,

IX. 1908, 3 3,3. Mahé: near Morne Blanc, X. 1908, 1 ¢; Cascade Estate, 800—1000

feet, I.—III. 1909, 2 3, 1 2; Mare aux Cochons district, 1000—2000 feet, 26. I. 1909—2,

II. 1909, 2 ¢.

Leproruaptus Forster, Hym. Stud. ii. 1856, pp. 129 & 137.

Recurrens bogig gekriimmt . ..........000.0cecssesesescseeeeseenes 61. L. heteropus, n. sp.

Recurrens gerade, nach der Basalis gerichtet ...........-..+++ 62. L. insulanus, n. sp.

61. Leptorhaptus heteropus, n. sp. (Text-fig. 3.)

$9. Schwarz; Mandibeln, Palpen, 2. Antennenglied, Coxe und Beine gelbrot ;

Hinterbeine schwarzbraun, Distalende der Coxa, Trochanter

und Knie rot. Mandibeln ungleich (fig. 3), die eine 2-zihnig,

die andere einfach. Antennen fadenformig, beim ? schlanker

als beim ¢, Scapus so lang wie das 3. Glied, beim ¢ ist das 3.

Glied in der proximalen Hiilfte stark ausgebuchtet, etwas

linger als das 4., dieses 4-mal so lang wie dick; 13. noch

3-mal kiirzer als das 14., beim ? ist das 14. Glied doppelt so

2 : = A Fig. 3. Die beiden Mandibeln

lang wie dick, kiirzer als das 15. Fliigel fast glashell, Mar- ae Tavcontiuotie heteropus,

ginalis wenig linger als die Radialzelle, diese schmal, 2—3-mal —_™ P-

so lang wie breit, von der Postmarginalis um mehr als ihre Lange tiberragt, Recurrens

stark bogig gekriimmt, liinger als die Marginalis, die Discoidalis fast beriihrend, der

Basalis parallel, Stigmaticalis etwa punktférmig. Petiolus 3—4-mal so lang wie dick,

grob gestreift, Abdomen vorn schmal, bis hinter die Mitte allmihlich verdickt, Hinterende

keglig, beim ¢ seitlich schwach zusammengedriickt. Linge: 3 mm.

Vorkommen. Seychellen-Inseln. Silhouette: near Pot-d-eau, VIII. 1908, 12; forest

above Mare aux Cochons, IX. 1908, 4 7,19. Mahé: near Morne

Blane, X. 1908, 2 3; high forest of Morne Blanc and Pilot,

XI. 1908, 1 2, 1 2; Mare aux Cochons district, 1—2000 feet,

26. I. 1909—2. IT. 1909, 1 ; Cascade Estate, about 1000

feet, II. 1909, 1%. Praslin: Cédtes d’Or Estate, Coco-de-Mer

forest in the Vallée de Mai, XI. 1908, 1 9.

62. Leptorhaptus insulanus, n. sp. (Text-fig. 4.)

3g. Gelbrot; Kopf schwarz, Gesicht oft braun, Flagellum

braun o andi ich (fig. 4), die ei

der schwarzbraun. Mandibeln ungleich (fig. 4),dieeine, 5; Et de ie batden’ Mandibeln

durch einen spitzen Einschnitt, in 2 dreieckige Ziihne ge- von Leptorhaptus insulanus,

spalten, die andere zugespitzt, vor der Mitte mit einem at

stumpfen und kurzen Zahn. Antennen fadenformig, Scapus des ¢ kaum linger als das 3.

78 PERCY SLADEN TRUST EXPEDITION

Glied, 2. Glied 1}-mal so lang wie dick, 3. 3—4-mal so lang wie dick, im proximalen

Drittel ausgerandet, die folgenden allmihlich verkiirzt, 13. noch mehr als doppelt so lang

wie dick, kiirzer als das 14.; Scapus des $ um die Hiilfte linger als das 3. Glied, 2. wie

beim ¢, 3. um die Hilfte linger als das 4., 4-mal so lang wie dick, 4. dein 5. gleich, die

folgenden allmahlich verkiirzt, nicht verdickt, 13. und 14. kaum linger als dick, 15. eirund.

Fliigel glashell, Marginalis so lang wie die Radialzelle, diese schmal, geschlossen, 2-mal so

lang wie breit, um ihre ganze Liinge von der Postmarginalis tiberragt, Recurrens gerade,

die Richtung der Radialis fortsetzend und gegen die Basalis gerichtet, der Marginalis

gleich. Petiolus schwach gebogen, runzelig, 4—5-mal so lang wie dick, wenig kiirzer als

das Abdomen, dieses beim ? spindelférmig, hinteres Drittel seitlich schwach zusammenge-

driickt, 3.—6. Tergit klein, 7. linger, Bohrer weit vorstehend ; Abdomen des ¢ fast spindel-

formig, Hinterende weder eingebogen noch seitlich zusammengedriickt. Linge: 2,5—3 mm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons and forest above,

IX. 1908, 6 3; low coconut-planted country near coast, Pointe Etienne, 17. 1X. 1908 siees

Mahé: near Morne Blanc, X. 1908, 1 3; high forest of Morne Blane and Pilot, XI. 1908,

1g; high forest behind Trois Freres, 14. I. 1909, 1 2; Mare aux Cochons district, 1—

2000 feet, I. 1909, 1 2; Cascade Estate, 1—2000 feet, IT. 1909, 2 2.

VII. Platygasteride.

AmBLyaspIs Forster, Hym. Stud. i. 1856, pp. 107 & 112.

Scutellum spitz keglio (2U7. .c.s..ccdseeeemee es reise ocotesces 63. A. flavosignatus, n. sp.

Scutellum halbkreisrund, mit einer Mittelliingsleiste ......... 64. A. bifoveatus, n. sp.

63. Amblyaspis flavosignatus, n. sp. (Text-fig. 5.)

g. Schwarz, glatt, kahl und glinzend; Mandibeln rot, Scapus, Coxe und Beine

sowie die Behaarung des Scutellum und des Mediansegments gelb. Kopf

breiter als der Thorax, wenigstens 3-mal so breit wie lang, oben fast

schneidig, hintere Ocellen vom Augenrand nur um ihren Durchmesser

entfernt. Mandibel mit 2 dreieckigen Ziihnen am abgestutzten Ende.

Antennen 9-gliedrig, Scapus proximal etwas verengt, so lang wie die 3

folgenden Glieder zusammen, 2. Glied doppelt so lang wie dick, 3. in der

Mitte verdickt, schwach gekriimmt, 4-mal so lang wie dick, 4. an beiden

Enden kaum schmaler, 3-mal so lang wie dick, 5.—8. verliingert, 4—5-mal

so lang wie dick, von der Mitte bis zam Proximalende allmihlich verengt,

am Distalende plotzlich in einen Stiel endigend, welcher fast doppelt so

lang wie dick ist, 9. Glied um 4 liinger als das 8., walzenrund (fig. 5) ;

Haare abstehend, bedeutend linger als die Dicke der Glieder. Thorax

langlich, Mesonotum wenig gewolbt, ohne Furchen. Scutellum gewélbt,

linger als breit, spitz keglig, seitlich und hinten sowie das Median- Fig. 5.. Dieleven

segment gelb pubeszirt. Fliigel briiunlich, lang bewimpert. Sporn der — Endglieder der

ants 6 : Bs _ Antenne von

vorderen Tibien dreispaltig. Abdomen so lang wie der tibrige Korper, — 4mbiyaspis fla-

flach, spatelf6rmig, Petiolus linger als breit. Linge: 1,5 mm. vosignatus, n. Sp.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons, IX. 1908, oe

KIEFFER—HYMENOPTERA, PROCTOTRUPOIDEA 79

64. Amblyaspis bifoveatus, n. sp.

?. Schwarz, glatt, glinzend und kahl; Antennen, ausgenommen die Keule, Coxze

und Beine gelb. Kopf wie bei voriger Art. Antennen 10-gliedrig, Scapus itber der Mitte

stark verdickt, am Distalende plitzlich in ein queres Stielchen verengt, proximal allmahlich

verengt, 2. Glied fast umgekehrt keglig, 2-mal so lang wie dick, 3. umgekehrt keglig,

schmaler als die iibrigen, nicht liinger als dick, kaum halb so lang wie das 2., 4. doppelt

so lang wie dick, fast walzenformig, so lang wie die zwei folgenden zusammen, 5. und 6.

nicht linger als dick, so diinn wie das 3., 7.—10. eine gleichdicke Keule bildend, vonein-

ander durch ein queres Stielchen getrennt, das 7. wenig linger als dick, umgekehrt keglig,

8. und 9. kaum so lang wie dick, walzenrund, 10. eirund ; Haare abstehend, kiirzer als

die Dicke der Glieder. Thorax wie bei voriger Art; Scutellum halbkreisformig, fast flach,

gelb pubeszirt, von einer unbehaarten Mittellingsleiste durchzogen, welche vom Hinterrand

des Mesonotum ausgeht und von letzterem nicht getrennt ist, beiderseits dieser Leiste

zeigt das Mesonotum, am Hinterrand, je eine grosse, gelb pubeszirte, kreisrunde Grube.

Fliigel glashell, nicht bewimpert. Abdomen flach gedriickt, spatelf6rmig, Petiolus grau

pubeszirt, so lang wie breit, 2. Tergit die Mitte des Abdomen iiberragend, die 4 folgenden

gleichkurz, das 7. etwas linger als das vorletzte. Linge: 1,5 mm.

Vorkommen. Seychellen-Inseln. Mahé: slopes of Morne Seychellois, about 1500—

2000 feet, 4. II. 1909, 1 9.

PLATYGASTER Latreille, Gen. Crust. et Ins. iv. 1809, p. 31.

Petiolus so lang wie breit, kaum pubeszirt ............0.0ss000e 65. P. mahensis, n. sp.

Petiolus quer, mit einem dichten, grauen Haarfilz ......... 66. P. seychellensis, n. sp.

65. Platygaster mahensis, n. sp.

?. Schwarz, glatt und gliinzend; die 3 ersten Antennenglieder, Coxe und Beine

gelb. Kopf gestaltet wie bei vorigen Arten, Ocellen in flachem Bogen, die ausseren um

ihren doppelten Durchmesser vom Auge getrennt. Antennen 10-gliedrig, Scapus linger

als die 4 folgenden Glieder zusammen, 2. Glied doppelt so lang wie dick, 3. das diinnste,

umgekehrt keglig, so lang wie dick, 4.—6. so dick wie das 2., nicht liinger als dick, Keule

gleichdick, 4-gliedrig, das 1. Glied etwas linger als dick, die 2 folgenden nicht linger als

dick, alle drei am Ende schwach nach aussen verliingert, das 4. linglich, alle 4 durch ein

queres Stielchen voneinander getrennt. Thorax etwas linger als hoch, Mesonotum stark

gewolbt, ohne Spur von Furchen, Scutellum kissenartig gewélbt, fast halbkreisrund.

Fliigel glashell, nicht bewimpert. Sporn der Vordertibien dreispaltig. Abdomen so lang

wie der Thorax, flach gedriickt, spatelférmig, Petiolus so lang wie dick, fast kahl,

Metapleure stiirker grau pubeszirt. Linge: 0,8 mm.

Vorkommen. Seychellen-Inseln. Mahé: Cascade Estate, 800—1500 feet, 1909, 1 .

66. Platygaster seychellensis, n. sp.

?. Schwarz; Antennen mit Ausnahme der Keule, Coxe und Beine gelb. Kopf

breiter als der Thorax, oben fast schneidig. Scapus so lang wie die 5 folgenden Glieder

80 PERCY SLADEN TRUST EXPEDITION

zusammen, 2. Glied doppelt so lang wie dick, 3. das diinnste, nicht linger als dick,

umgekehrt keglig, 4. und 5. so dick wie das 2. oder wie das 6., walzenformig, etwas linger

als dick, 6. fast kuglig, kaum so lang wie dick, die 4 Keulenglieder gleichdick, durch ein

queres Stielchen voneinander getrennt, 7.—9. deutlich linger als dick, 10. wenigstens

doppelt so lang wie dick. Thorax wie bei voriger Art. Fliigel glashell, nicht bewimpert.

Petiolus quer, mit dichtem grauem Haarfilz, Abdomen kaum linger als der Thorax, flach,

hinten etwas zugespitzt. Linge: 0,8 mm.

Vorkommen. Seychellen-Inseln. Silhouette: Mare aux Cochons, IX. 1908, 1 9.

ERKLARUNG DER TAFELN 2 UND 38.

TAFEL 2.

Fig. 1. Mesodryinus mahensis, n. sp. ¢.

Fig. 2. Mesodryinus mahensis, Vordertarsus.

Fig. 3. Parabeus ruficornis, n. g. et n. sp. ¢.

Fig. 4. Odontacolus longiceps, n. g. et n.sp. ¢.

Fig. 5. Enneascelio exaratus, n. g. et n. sp. ¢.

Fig. 6. Oriscelio seychellensis, n. g. et n. sp. ¢.

TAFEL 3.

Fig. 7. Macroteleia versicolor, n. sp. ¢.

Fig. 8. Neuroteleia rufa, n. g. et n. sp. ¢.

Fig. 9. Lamproteleia fasciatipennis, n. g. et n. sp. ¢.

Fig. 10. Paranteris nigraticeps, n. g. et n. sp. ¢.

Fig. 11. Schizopria fallax, n.g. et n. sp. f.

Fig. 12. Rhopalopria vulgaris, n. g. et n. sp. &.

Fig. 13. Diapria seychellensis, n. sp. ¢.

Pgrrey SLADEN TRUST EXPEDITION. TRANS.LINN. Soc. SER.2.Z00L VOL.XV. PL. 2

(KIEFFER)

{

: Wilson del.ot ith

PROCTOTRUPOIDEA FROM SEYCHELLES

| iat

; 4

i a = 7

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oak .

—_

Percy SLADEN TRUST EXPEDITION. TRANS. LINN. Soc. SER.2.Z00L VOL.XV Pu.3

(KIEFFER)

NA CC

‘Seal

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PROCTOTRUPOIDEA FROM SEYCHELLES.

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ca a tins |

No. V.—DIPTERA, CULICIDA.

By Frep. V. THEOBALD, M.A., F.E.S., Ere.

(Plate 4 and Text-figures 1—12.)

(CommunicaTED BY Pror. J. STantey Garpiner, M.A., F.R.S., F.L.S.)

Read 15th June, 1911.

Tue following Report is drawn up from material collected by Mr Hugh Scott and

Mr J. C. F. Fryer during the Expedition to the Seychelles and dependent Islands, such

as Aldabra. So far only nine species of Culicidee have been found on the Islands. One

of these (undoubtedly a new species) was preserved only in spirit and cannot be described ;

from the wing scales and ? palpi it is evidently a Teniorhynchus and of large size, but

there are certain differences which may necessitate its being placed in a new genus when

further material comes to hand. Of the other eight species five are new; one is a

Reedomyia, another a Culicelsa, the third a Culex, the remaining two come in a new genus

_ for which I propose the name of Pseudoficalbia on account of their general resemblance

_ to the Indian Ficalbia.

In evident error I included Ficalbia inornata Theob. from the Transvaal and

Ficalbia nigripes Theob. in the Asiatic genus; they are now seen to clearly come in

Pseudoficalbia.

The other three previously known Culicids are Stegomyia fasciata, Fabricius,

Stegomyia scutellaris, Walker and Culex fatigans, Wiedemann.

The latter was not obtained by the members of the Expedition, unless it occurs

in some tubes of specimens preserved in alcohol, numbers of which have not been

examined as it is merely guess work to identify a Culicid from such material. Specimens

_ preserved in alcohol are most useful, if they can be definitely associated with dry specimens

of the same species.

The same must be said of the larve collected, there being no reference as to which

species they belong to. One, however, is figured, as Mr Hugh Scott thinks that it belongs

to one of the new species described here.

Genus Stecomyt1A, Theobald.

Monog. Culicid. i. 283, 1901.

1. Stegomyia fasciata (Fabr.), 1805.

Culex calopus, Meig., 1818. Culex toxorhynchus, Macq., 1838.

» frater, Rob. Desv., 1827. 5 annulitarsis, Macq., 1848.

» mosquito, Rob. Desv., 1827. » fermosus, Walker, 1848

» teniatus, Wied., 1828. » viridifrons, Walker, 1848.

» konoupi, Brullé, 1832. » tmexorabilis, Walker, 1848.

SECOND SERIES—ZOOLOGY, VOL. XV. 11

82 PERCY SLADEN TRUST EXPEDITION

Culex excitans, Walker, 1848. Culex frater, Rob. Desv., 1827.

» exagitans, Walker, 1886. » mosquito, Arrib., 1891.

» wmpatabilis, Walker, 1860. », elegans, Ficalbi, 1896.

5 gonatipes, Walker, 1861. » rossii, Giles, 1899.

» banecroftii, Skuse, 1886. Stegomyia fasciata persistans, Banks, 1906.

(Fabricius, Syst. Antl. 36. 13 (1805); Theobald, Monog. Culicid. i. 289, 1901, iii. 141, 1903, iv. 176, 1907

and v. 158, 1910.)

Localities. Aldabra: Picard Island, 1908—9 (J. C. F. Fryer). Amirantes: Darros

Island, 13. X. 1905. “Seychelles: Port Victoria (Dr Denman).

General distribution. South America, Central America, Southern and Central North

America, West Indies; Ceylon, India, Malay States, China, Japan, Philippine Islands,

East Indies ; Australia ; South, Central, North, East and West Africa ; Southern Europe ;

Madagascar ; Pacific Islands; Fiji; Mauritius ; Sandwich Islands, ete.

An abundant and widely-spread household species which conveys yellow fever. More

abundant in the new than in the old world.

2. Stegomyia scutellaris (Walker), (Text-fig. 1).

Culex scutellaris, Walker, 1859.

», variegatus, Doleschall, 1858; (non Schrank, 1871; non Blanchard, 1852).

» albopictus, Skuse, 1895.

(Walker, Journ. Linn. Soc. Lond., Zool. iii. 77, 1859; Theobald, Monog. Culicid., i. 298, 1901, iii. 144,

1903, iv. 179, 1907, v. 155, 1910.)

Localities. Seychelles: Mahé; marshes on coastal plain at Anse aux Pins, 1909;

near Morne Blanc, about 800 ft., 1908; Cascade Estate, about 1000 ft.; Long Island,

1908; Capucin (R. P. Dupont)+; Port Victoria (R. P. Dupont and Dr Denman){ ;

Fig. 1. Stegomyia scutellaris (Walker), ?, wing.

Silhouette, low cultivated country, IX. 1908. Praslin, 1908. Dennis Island, 1908.

Coetivy, 10. V. 1905. Amirantes: Desroches Island, 15. VIII. 1905. Chagos: Peros

Banhos Atoll (Diamant Island, 19. V. 1905).

General distribution. Ceylon, India, Malay States, China, East Indies, Japan,

Formosa, Philippine Islands, Mauritius, Sandwich Islands.

Note. Mr Scott gives the following notes: “Bites in daytime”; “some bite in

forests in daytime.” Some of the specimens were taken in 1905 on the H.MLS. “Sealark”

Expedition.

* This record was included in the Monograph of the Culicids of the World.

+ These records were originally given in the Monograph of Culicidee of the World.

THEOBALD—DIPTERA, CULICIDA 83

This species is widely distributed over Asia and the East Indies, where it largely

takes the place of Stegomyia fasciata (Fabr.).

The species in the Fiji Islands and the Pacific Islands is not as I recorded (Monog.

Culicide, v. p. 155) this insect, but a distinct species known as Stegomyia pseudoscutellaris

Theobald (The Entomologist, June 1910, p. 156).

True scutellaris have white puncta on the pleurse, pseudoscutellaris has prominent

white lines.

The single median white thoracic line is the same, however, in both species and thus

they may easily be confused.

Genus ReepomytA, Ludlow.

Ludlow, Canad. Ent., xxxvii. 94, 1905; Theobald, Monog. Culicid., iv. 257, 1907,

v. 252, 1910.

3. Reedomyra seychellensis, nov. sp. (Plate 4, figs. 1, 2 and Text-fig. 2).

Thorax rich brown with some scattered golden scales; scutellum with flat white

scales; pleurze pale brown with patches of flat creamy scales. Head with a prominent

dark spot on each side. Abdomen black, second to fourth segments with narrow basal

———

Fig. 2. Reedomyia seychellensis, nov. sp. A. Wing of 9. B. Wing of var. similis.

white bands, small basal lateral white spots ; venter with broad basal white bands. Legs

brown, unbanded, venter of femora creamy, an apical creamy spot on femora and a broader

apical pale band to the tibize, most prominent on the hind legs.

?. Head (Plate 4, fig. 1) dark, clothed with narrow-curved pale golden scales in the

middle, which show brown tinges in front, upright black forked scales behind and a few

thin upright long brown forked scales in front, a large patch of flat black scales on each

side followed by flat creamy scales which partially surround the dark area posteriorly,

cheetze black; clypeus nude, black; palpi small, densely clothed with black scales and

with black cheetze ; proboscis normal brownish-black. Thorax deep rich brown, with small

11—2

84 PERCY SLADEN TRUST EXPEDITION

narrow-curved bronzy-brown scales and some scattered pale golden ones, some broader

creamy ones in front near the head ; cheetze dark brown to black ; scutellum (Plate 4, fig. 2)

pale brown clothed with flat silvery white scales and some similar coloured small narrow-

curved ones along the posterior border, posterior border-bristles long rich brown, six large

ones to the mid lobe in two groups and one smaller between, some very short pale golden

hairs between them; metanotum brown; pleure pale brown with three patches of flat

creamy scales, two large and one small. Abdomen black, the basal segment dark, the

second, third and fourth with basal white bands and traces on the fifth, all the segments

with basal lateral white spots, border bristles pale golden; venter dark but with very

broad basal white bands.

Legs deep brown, unbanded ; femora pale beneath, except just at the apex, a small

apical pale band, tibize dark with a broad apical white band and with pale bristles, first

tarsal segments with pale bristles; fore and mid ungues equal and uniserrate, hind equal

and simple (?).

Wings (Text-fig. 2.4) with brown scales, the first submarginal cell longer, but no

narrower than the second posterior cell, its stem rather more than half the length of the

cell, its base slightly nearer the apex of the wing than that of the second posterior cell,

stem of the latter not quite so long as the cell; mid cross-vein large, the posterior

considerably shorter than the mid and about twice its own length distant from it ;

halteres pale ochreous.

Length. 3 to 4mm.

Localities. Seychelles: Dennis Island, VIII. 1908 (J. C. F. Fryer); Silhouette,

high forest, VIII. 1908 (H. Scott); Mahé, near Morne Blanc, X.—XI. 1908 (H. Scott).

Aldabra: Takamaka (J. C. F. Fryer, 1908—9).

Observations. Described from five perfect females. It is easily distinguished from

the other known Reedomyia by the pale apex of the femora and tibize, by the apex of the

abdomen not being white, and from its nearest ally R. neobiannulata, Theob. (from West

Africa) by the hind tibial bands being much more prominent and no white scaled spot at

the base of the wings.

In the previously described species of this genus I did not notice the small narrow-

curved scales at the posterior border of the scutellum plainly seen in the Seychelles

insect.

One small female shows two obscure thoracic pale golden-scaled spots on the middle

of the mesonotum and traces of two anteriorly, but the general characters are such that

it cannot be accepted as a distinct species. It is one of two specimens from Aldabra, the

other quite as in the type. (= var. similis, Text-fig. 2. B.)

Genus Cuticetsa, Felt.

Felt, Bull. 79, Ent. 22, N. York State Mus. 391. 6, 1904; Theobald, Monog. Culicid.

iv. 377, 1907, v. 315, 1910.

4. Culicelsa fryert, nov. sp. (Text-fig. 3).

Thorax deep rich brown with some golden scales forming four obscure. spots and

presenting linear arrangement; scutellum slightly paler scaled. Abdomen black with

—

THEOBALD—DIPTERA, CULICIDAi 85

basal white bands with median lateral white spots. Legs deep brown with scattered

golden scales in certain lights, golden cheetze on the tibie ; tarsi with basal white bands

on all segments of the hind legs, on all but the last in the mid and all but last two in the

front.

9. Head black with creamy yellow scattered narrow-curved scales and numerous

black upright forked scales over most of the surface, a small patch of flat grey scales

anteriorly at the sides, with dusky ones behind and laterally, golden to creamy narrow-

curved scales around the eyes; cheetze deep brown with golden sheen apically ; clypeus

bright brown, slightly acuminate ; proboscis deep brown with scattered yellowish scales on

the basal half; antennze brown, basal segment bright pale brown, some scanty dark scales

basally.

Thorax deep rich brown with scattered small pale golden narrow-curved scales, which

are more dense in two patches in front and on the middle of the mesonotum, forming

indistinct spots (the median most prominent) and around the front, there are also traces

of linear arrangement in certain lights, chet rich brown with golden reflections ;

Fig. 3. Culicelsa fryeri, nov. sp., 9, wing.

seutellum brown with almost cream-coloured narrow-curved scales, which spread into the

mesonotum, border bristles rich brown; metanotum brown; pleurze brown with creamy

puncta of flat scales.

Abdomen black, banded, the basal segment with white scales laterally and in the

middle, dark scales apically in the middle; second to fifth segments with basal white

bands which on the second and fifth spread outward slightly in the middle line, the fifth

segment with a narrow band of apical creamy scales and the sixth with ochreous yellow

median scales and a similar coloured apical band, all the segments with median lateral

white spots, most prominent on the fifth and spreading on to the dorsum ; border bristles

pale golden brown ; venter mostly white scaled, with narrow dark apical bands.

Legs banded, dark brown with scattered golden scales on the femora and tibiz and a

few on the first tarsal segment, femora mostly pale scaled beneath, apex of femora and

tibize yellow, base of first, second and third front tarsals with narrow white bands, last two

dark, in mid legs the fourth has also a narrow white band, in the hind legs all the tarsals

have broader basal white bands; femora, tibize and to some extent the first hind tarsals

with golden bristles; ungues, equal and uniserrate on fore and mid legs, equal and simple

on hind. Wings (Text-fig. 3) with mottled scales; scales on the basal half’ of the wing

rather broad and spatulate, lateral vein scales thinner past the cross-veins; fork-cells

86 PERCY SLADEN TRUST EXPEDITION

short, the first slightly longer and much narrower than the second, its stem nearly two-

thirds the length of the cell, its base if anything slightly nearer the apex of the wing than

that of the second fork-cell, stem of the latter nearly as long as the cell; mid cross-vein

longer than either the supernumerary or the posterior, the latter about its own length

distant from the mid cross-vein.

Halteres pallid.

Length. 3:5 to 4 mm.

Locality. Aldabra: Takamaka (J. C. F. Fryer), 1908—9.

Observations. Described from a series of nine females. There is some slight variation

in the thorax, some showing a more uniform appearance than others. The abdomen also

varies, some showing extra and more prominent median extensions of the basal white

bands, but the median lateral white abdominal spots, the scattering of golden scales on the

thorax and legs and the mottled wings should at once separate it.

In some respects (7.e. wings) it bears some resemblance to a Grabhamia.

Fig. 4. Culex scottii, nov. sp., 2.

Fig. 5. Culex scottii, nov. sp., head of ¢.

Genus CuLEx, Linnzeus.

Linneus, Linn. Syst. Nat. Ed. x., 1758, 602; Theobald, Monog. Culicid. i. 326, 1901,

lili. 157, 19038, iv. 387, 1907, v. 322, 1910.

5. Culex scottu, nov. sp. (Plate 4, fig. 3 and Text-figs. 4—7).

Head brown with golden scales ; palpi and proboscis brown; thorax deep rich brown

with two double median parallel golden-scaled lines and a curved lateral golden scaled

line, acutely bent in at the middle of the mesonotum and a short golden scaled line over

the root of each wing, sharply defining off two prominent anterior deep brown areas, two

narrower posterior ones and a thin median area.

THEOBALD—DIPTERA, CULICID& 87

Abdomen unbanded but with basal lateral yellow spots. Legs unbanded, apex of

femora and tibiz pale, venter of femora pale.

? (Text-fig. 4.) Head brown, with dense narrow-curved pale golden scales, rich

golden upright forked scales in the middle, dark ones at the sides and flat pale creamy

scales laterally, cheetee brown with golden reflections ; clypeus, palpi and proboscis deep

brown ; antennz brown, basal segment bright ochreous.

Thorax (Plate 4, fig. 3) deep rich brown with narrow-curved almost hair-like scales,

ornamented as follows with golden and rich bronzy brown—two submedian golden-scaled

parallel lines in front, each with a faint median dividing darker line, a curved line of

similar coloured scales on each side, but brighter, bent inwards about the middle of the

mesonotum and continued backwards parallel with the two submedian lines, another short

line in front of the roots of the wings ; cheetee dark brown with golden reflections; scutellum

brown with narrow-curved pale scales and with eight posterior border bristles ; metanotum

deep brown ; pleurze deep brown with three patches of dull grey flat scales.

Abdomen black, unbanded, with golden posterior border bristles ; laterally are basal

golden yellow to creamy spots, venter with similar coloured basal bands, pale at the base.

Fig. 6. Culex scottii, nov. sp. A. Wing of 6. 3. Wing of 9. Fig. 7. Culex scottii, nov. sp., genitalia of 3.

Legs dark brown, venter of femora, except near apex, pale creamy, a pale spot at the

apex of femora and a more prominent one at apex of tibize, especially on the hind legs ;

ungues equal and simple.

Wings (Text-fig. 6 B) with the apices of the veins densely scaled, with long thin

lateral scales, fork-cells long, the first submarginal much longer and a little narrower than

the second posterior cell, its base much nearer the base of the wing than that of the latter,

its stem very short, less than one-fifth the length of the cell; stem of the second fork-cell

a little more than half the length of the cell; posterior cross-vein sloping backwards,

nearly twice its own length distant from the mid cross-vein.

Halteres with pale stem and fuscous knob with some grey scales.

Length. 3°5 to 4°5 mm.

88 PERCY SLADEN TRUST EXPEDITION

d. Head (Text-fig. 5) with narrow-curved pale golden yellow scales, black upright

forked scales except in front, where they are rich golden, flat creamy-coloured scales laterally,

cheetee brown and golden brown, bright golden in the middle; palpi thin, acuminate,

longer than the proboscis by the last segment, which is a little longer than the penulti-

mate one, brown, a narrow pale almost white band towards the base, and a small one at

the base of the last two segments, last two segments with long brown hairs on each side ;

antennz banded brown and white, plume hairs very fine and brown.

Thorax as in the $. Abdomen black with traces of yellow basal bands (in some

lights these are almost white) on third, fourth and fifth segments, a few yellow scales on

the second, the apical segments with long lateral patches of yellow scales ; border bristles

and lateral hairs pale brown and golden ; venter mostly yellow-scaled, narrow black bands

to the last one or two segments. Male claspers (Text-fig. 7) simple, rather broad, with a

short subapical terminal segment, foliate plate normal.

Legs brown, unbanded, venter of femora pale, a pale spot at apices of the femora and

tibie. Fore and mid ungues unequal uniserrate, hind equal and simple.

Wings (Text-fig. 6.4) with rather long fork-cells, the scales broader than in the @,

first fork-cell much longer and narrower than the second fork-cell, its stem one-fourth the

length of the cell, its base considerably nearer the base of the wing, stem of the second

fork-cell about two-thirds the length of the cell, posterior cross-vein about the same length

as the mid and about twice its own length distant from it.

Length. 4°5 mm.

Localities. Seychelles: Mahé and Silhouette, 1908—9 (H. Scott).

Observations. Described from a series of 41 9s and 38 fs.

The following notes sent with them :—‘‘ Mahé, Cascade Estate, about 1000 feet,

calmer and wetter season X. 1908 and XI. 1909. Come into house at evening, especially

when lamps are lighted” ; “‘ Mahé near Morne Blanc, 1000 feet X.—XI. 1908, come into

house when lamp is lighted and bite”; ‘Silhouette forests about 1000 feet and more,

trade wind season VIII.—IX. 1908, come in evening when there is lamplight and bite ;

on very windy evenings much less numerous.”

There is not much variation in the specimens, but some do not show the thoracic

ornamentation as clearly as others. Its marked thoracic appearance and unbanded

abdomen in the female will at once separate it from other Culices. The male shows

abdominal banding, but again the thoracic ornamentation is very marked.

6. Culex fatigans, Wiedemann, 1828.

Culex estuans, Wied., 1828.

», pallipes, Meig., 1838.

» anarfer, Coq. (Bigot), 1859.

Heteronycha dolosa, Arrib., 1896.

Culex pungens, Wied., 1828 ?

(Wiedemann, Auss. Zweif. Ins. 10, 1828; Theobald, Monog. Culicid. ii. 151, 1901, iii. 225, 1903,

v. 383, 1910.) :

Localities. Seychelles: Port Victoria, Mahé (Dr Denman) ; Mahé (Mr Hugh Scott).

THEOBALD—DIPTERA, CULICIDAi 89

General Distribution. India, Africa, South Europe, Australia, South America, West

Indies and most Oceanic Islands.

The common Brown Household Mosquito of the tropics and sub-tropics, its place

taken in temperate and sub-Arctic regions by Culex pipiens, Linneeus.

Genus TaniorHyncuus, Arribalzaga, 1891.

Panoplites, Theobald, Monog. Culicid., ii. 173, 1901; i. 269, 1903; iv. 494, 1907;

v. 446, 1910. Mansonia, Blanchard, Compt. Rend. Soc. Biol., p. 1046, t. lin, 1901.

7. Species? (probably new).

Some spirit specimens (4), badly damaged and even the wings mostly denuded, with

the following note :—‘ Mahé, Seychelles, cultivated low country (Barbarons). Given by

Jules Michel, 1908.”

The bracket-like wing scales remaining are longer than in any species I have

seen, and the apical palpal segment is longer. A large mosquito 6 mm. long, certainly

undescribed, and may possibly belong to a new genus near Teniorhynchus.

A. B.

A. Male. bB. Female.

Fig. 8. Pseudoficalbia pandani, nov. sp.

Genus PsEUDOFICALBIA, nov. gen.

Head covered with flat scales and some upright forked scales; palpi short in 3

and ?; proboscis in both sexes slightly swollen apically; ? antennz pilose, ¢ antennee

plumose.

Thorax with long thin narrow-curved scales ; scutellum with three patches of small

flat scales and some small narrow-curved ones, on the posterior border ; three border

pristles to the mid lobe.

SECOND SERIES—ZOOLOGY, VOL. XV. 12

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90 PERCY SLADEN TRUST EXPEDITION

Male genitalia with short broad basal lobes and longish claspers.

Ungues of ¢ equal, simple and small on fore and hind legs, unequal and simple on

mid pair. Fork-cells moderately long ; wing scales as in Mimomyia.

This genus comes between Ficalbia and Mimomyia. From the former it can be told

by the wing scales, and from the latter by the flat scutellar scales, which in Mimomyia are

narrow-curved ones; the ¢ proboscis is also very different to that in Mimomyia.

Two other species must be placed in this genus, namely Ficalbia inornata, Theob.*,

from the Transvaal, and Ficalbia nigripes, Theob.t, from Sierra Leone.

8. Pseudoficalbia pandani, nov. sp. (Plate 4, fig. 4 and Text-figs. 8—10).

Head black ; thorax bright ochreous with two dark parallel lines behind; scutellum

ochreous with three black spots; metanotum ochreous with two parallel darker lines ;

pleuree pale. Abdomen unbanded or with a variable number of white basal bands, venter

pale. Legs uniformly dark brown.

A. B.

Fig. 9. Pseudoficalbia pandani, nov. sp. A. Head of g. B. Head of 9.

? (Text-fig. 8B). Head (Text-fig. 9B) clothed with rather large flat black scales and

a few black upright forked scales and with black chzetze ; clypeus and palpi black, proboscis

black, except apex which is pale ; antennze deep brown, basal segment black.

Thorax bright ochreous with scattered long black scales which form two distinct dark

parallel lines behind, some smaller golden curved scales underlying them, chzetz long and

black ; scutellum pale ochreous with three patches of small rather elongate flat black scales

and black border bristles, three to each lobe ; metanotum ochreous with two broad darker

lines ; pleurze pale ochreous.

Abdomen black, the fourth, fifth and sixth segments with narrow basal white bands ;

apex with numerous golden and brown bristles; posterior border bristles dark ; venter

pale.

* Theobald, The Entomologist, xli. 108, 1908. + Monog. Culicid. iv, 578, 1907.

EE TD

THEOBALD—DIPTERA, CULICIDAS 91

Legs deep blackish-brown with bronzy sheen, coxze and trochanters ochreous, the

former with black bristles; ungues small, equal and simple.

Wings (Text-fig. 10) with brown scales, outer costal border dark and spinose, first

submarginal cell shorter and slightly narrower than the second posterior cell, its base

nearer the apex of the wing, its stem not quite one and a half times the length of the

cell; stem of the second posterior cell slightly longer than the cell; posterior cross-vein

slightly longer than the mid, about half its own length distant from it; the sixth long

vein bends abruptly to the costa and has only a single row of scales.

Halteres with pale stem and fuscous knob.

Length. 2°5 to 3 mm.

$ (Text-fig. 8a). Head (Text-fig. 9 a), thorax and abdomen similar to the ?, but the

abdominal banding indistinct. Palpi and proboscis black, the latter slightly swollen

apically, not quite so much as in the ?; palpi very short, clavate with a few black

bristles ; antennze plumose banded grey and brown, hairs flaxen brown, the brown area

of each segment nearly twice as long as the grey.

Wings (Text-fig. 10 c) with similar scales to the $; fork-cells short, the first slightly

shorter and narrower than the second, its base

the nearer to the apex of the wing, its stem

nearly twice as long as the cell; stem of the

_ second fork-cell about one-third longer than the

‘cell; supernumerary cross-vein slightly angu-

lated, the posterior about the same length as

the mid and about its own length distant from

it; the first and second long veins lie close

together.

Legs as in ¢; fore ungues small, equal and

simple, the mid unequal, simple, one curved, one

small and straight ; hind equal and simple, small.

Genitalia (Plate 4, fig. 4) with short, thick

basal lobes, claspers long and acuminate ; setifer-

ous lobe dark, with some long fine hairs and a

single pale long sword-like bristle.

Length. 3°5 mm.

Locality. Seychelles: Mahé, 1908—9.

Observations. Described from a series of

16 $s and 4 gs. The following notes are ap-

pended :—“ Mahé, forest behind Cascade about

1500 feet, II. 1909. Caught in morning flying Fig. 10. Pseudoficalbia pandani, nov. sp.; 4, wing

) of 2 with banded abdomen ; B, wing of ? with

amongst dead leaves of Pandanus hornet on abdomen scarcely banded ; c, apex of ¢ wing.

ground under a large group of those trees;

never noticed them try to bite”; ‘Mahé, Jan. 1907, calm and wetter season. Swept

‘in daytime from low herbage at places near sea level (Anonyme Island and Anse aux

12—2

92 PERCY SLADEN TRUST EXPEDITION

Pins coast marsh)”; ‘Mahé, Mare aux Cochons, 1500 feet. From swampy place with

half dried up pools amongst dead Pandanus Horne: leaves. Caught in daytime.”

Quite a distinct small species which, however, bears a strong resemblance to

Pseudoficalbia nepenthes. The marked difference in the venation can, however, be seen

by comparing the photos of the wings. Probably it breeds in water collected in the

bases of Pandanus leaves.

There is some colour variation in the series. In some the abdominal banding is

very faint, frequently due to partial scale denudation, however, and in others the

metanotum varies, two marked varieties being the following :—

Variety I. Metanotum all ochreous, the black knobs of the halteres showing as

two black spots over it.

Variety II. Metanotum all black, abdomen with only trace of banding.

It comes very near Pseudoficalbia nigripes, Theobald (Monog. Culicid. iv. 578) which

I placed in error in the genus Ficalbia, Theob. It can be told at once from it by the long

dark thoracic scales.

9. Pseudoficalbia nepenthes, nov. sp. (Plate 4, figs. 5, 6 and Text-figs. 11, 12).

Head black, thorax bright ochreous with indistinct dark lines and three black spots

on the pale scutellum ; metanotum pale ochreous. Abdomen black with basal white bands,

Fig. 11. Pseudoficalbia nepenthes, nov. sp., 2 ; wing.

except on the first and second segments. Legs bronzy black, unbanded. Proboscis black,

slightly swollen in ? towards the apex; palpi and antennz black. Wings with dark

veins.

?. Head clothed with flat black scales and black upright forked scales and black

cheetze ; clypeus and proboscis black, the latter swollen towards the apex; palpi very

small, black ; antennze deep brown, basal segment black, a few small black flat scales.

Eyes violet. Thorax bright ochreous with scattered long thin black scales and long black

bristles which have golden apices in certain lights; on the integument can be seen three

slightly darker parallel longitudinal lines; scutellum bright ochreous with three patches

of small flat black scales, forming three marked dark spots; posterior border bristles black,

four large ones to the mid lobe, three large and some smaller ones to the lateral lobes.

Metanotum bright ochreous ; pleurz bright ochreous.

Abdomen black, the segments except the first and second with basal white bands ;

posterior border bristles golden and brown, many golden bristles apically ; venter black

and white banded.

THEOBALD—DIPTERA, CULICIDA 93

Legs black with bronzy reflections and with golden bristles; ungues small.

Wings (Text-fig. 11) with typical large brown Mimomyian scales, costa dark, spiny ;

first submarginal cell not quite as long and narrower than the second posterior cell, its

stem not quite twice as long as the cell, base of the cell nearer the apex of the wing than

that of the second posterior cell, stem of the latter slightly longer than the cell ; posterior

cross-vein rather more than its own length distant from the mid cross-vein; sixth vein

abruptly bent at the apex which is devoid of scales, from the bend scales project outwards.

Halteres with pale stem and black knob.

Length. 3 mm.

Locality. Seychelles: Silhouette, 1908.

Observations. Described from a single perfect ?, taken in highest damp forests

(over 2000 ft.), 29. VII. 1908, found sitting in Nepenthes pitcher which contained Culicid

larve. It is a very marked black and ochreous species, with large black thin thoracic

scales and slightly longer fork-cells than in the previous species. The larvee described here

taken from the pitchers of Nepenthes upon which the adult was caught may belong to this

species.

Larva (Text-fig. 12 a) 4 to 4°5 mm. long. Head (Plate 4, fig. 6 a) longer than broad ;

antenn (Plate 4, fig. 6c) rather short

and thick, of two segments, ending in

three rather broad spines with tapering

apices and a small foliate plate; labial

plate (Plate 4, fig. 6B) nearly twice

as long as broad; frontal prominence

(Plate 4, fig. 6p) with two short,

broad acuminate processes and two long

cheetze projecting forwards behind them ;

mandibles (Plate 4, fig. 6c) serrated as

shown in figure.

Thorax broader than the head, but

only a little longer, with a pair of long

dark bristles on each side in front,

followed by two groups of three bristles

on each side, three lateral tufts arising

from a distinct prominence, also cheetze

on the dorsum. The first two abdominal

Segments have each a pair of long dark

cheetee laterally, the third to sixth a Fig. 12. Pseudoficalbia nepenthes, nov. sp.; A, larva;

single dark chzta on each side, seventh sel

and eighth apparently nude; siphon (Plate 4, fig. 5 4) very short and thick, no longer

than the terminal segment (Plate 4, fig. 5B) which has two tufts of long brown hairs and

two pairs of globular processes.

Pupa (Text-fig. 128), 4 mm. Siphons rather short of marked form (vide figure),

94 PERCY SLADEN TRUST EXPEDITION

anal plates short and broad, flat and overlapping, minutely serrated at their borders, with

a dark spot on the middle of the posterior borders and a marked central rib; a single long

black lateral chzeta on each of the first three segments, a pair of ventral ones on each side

of the fourth and fifth, a single one on the remainder, on the fourth two long cheetze on the

posterior border on each side, one on each side of the fifth and a very short one on each side

of the sixth ; a tuft of short cheetze on the dorsum of the first.

This larva and pupa taken in Nepenthes pitchers where Pseudoficalbia nepenthes was

caught may belong to that species, Mr Scott informs me. It is a marked type of larva.

EXPLANATION OF PLATE 4.

Reedomyia seychellensis, nov. sp., $; head.

Reedomyia seychellensis, nov. sp., $; scutellum.

Oulea scottii, nov. sp., $; thoracic adornment.

Pseudoficalbia pandani, nov. sp., f°; genitalia.

Pseudoficalbia nepenthes, nov. sp., larva; a, larval siphon and terminal segment; (hairs cut off);

b, the same (reduced) showing normal hairs.

6. Pseudoficalbia nepenthes, nov. sp., larva; a, head; b, labial plate; c, antenna; d, frontal prominence ;

e, mandible.

CSE COR ES a=

Percy SLADEN TRUST EXPEDITION. TRANS. LINN. Soc, SER.2.Z00L VOL.XV PL 4

(THEOBALD)

DIPTERA , CULICIDAE.

No. VI—DIPTERA, STRATIOMYIIDA.

Von Dr K. Kerresz (Magyar Nemzeti Muzeum, Budapest).

(Textfiguren 1—4.)

(Mrreereitt von Pror. J. Stantey Garpiner, M.A., F.R.S., F.L.S.)

Gelesen den 19. Januar 1911.

Pachygastrine.

Wautacea, Dol., Natuurkund, Tijd. Ned. Ind., Ser. 4, ii. (xvii), 82. 1858.

1. Wallacea albopilosa, Meij., £2, Tijdschr. Ent. 1. 238. 3. 1907.

Die Exemplare stimmen mit dem typischen Weibchen, das ich Herrn Meijere ver-

danke, vollkommen iiberein, nur sind sie etwas grésser (3.6 mm.) und das Toment

des Thoraxriickens ist ganz deutlich gelb.

Fundorte. Seychelles: Mahé; Cascade Estate, 800—1500 Fuss, HI. 1909; Mare

aux Cochons, 1500 Fuss, II. 1909. Java.

LopHoTeELes, Loew, Berl. Ent. Zeit. u. 110, 1858.

2. Lophoteles plumula, Loew, 22, l.c., iti. tab. 1, fig. 16—18.

Fundorte. Seychelles: Silhouette, Plateau des Mare aux Cochons, 1700—2000 Fuss ;

Mahé, ungefiihr 1000 Fuss, Morne Blanc und Pilot, [X.—XI.; Cascade Estate, 1909. Ins.

Radak.

TINDA, Walker, Journ. Linn. Soc. London, iv. 101, 1860.

38. Tinda modifera, Walker, l.c., f.

Fundorte. Seychelles, ein Miinnchen von Mahé. Ind. orient., Celebes, Java,

Manila.

Nemoteline.

BracuycarA, Thomson, Eugenies Resa, Dipt. 460, 1869.

4. Brachycara ventralis, Thomson, /.c., 461, tab. 9, fig. 4.

Fundorte. Seychelles; Mahé, Anonyme Island, I. 1909. Neu Guinea; Cocos

Keeling ; Minikoi (in Cambridge Mus.).

96 PERCY SLADEN TRUST EXPEDITION

Stratiomyiine.

Evuatta, Meig., Nouvelle Classification, 21. 28, 1800.

[ Odontomyia, Meig., Iliger’s Mag. f. Ins. 11. 265. 29, 1803. ]

5. Hulalia? aequalis (Walk.).

Stratiomys aequalis, Walk., Journ. Linn. Soc., London, v. 271, 1861.

Walker’s Beschreibung ist ziemlich gut auf die vorliegenden Exemplare anwendbar,

doch is die Bestimmung ohne Vergleich der Type nicht gesichert.

Fundorte. Aldabra, neben Wilson’s Well, XI. 1908, ein Piarchen (J. C. F. Fryer).

Batjan.

CaATATASIS, nov. gen.

Den Kopfbau und der Aderung der Fliigel nach, steht die Gattung nahe zu

Eulalia Meig.

Kopf (Fig. 1. 2) breiter als hoch (gf 27:22; ¢ 22:16). Augen nackt, die des

Mannchens nur auf einer kurzer Strecke zusammenstossend, die des Weibchens durch

Figs. 1—4. Catatasis clypeata, nov. gen., nov. spec. 1. Kopf des Mannchens von der Seite.

2. Kopf des Weibchens von der Seite. 3. Fihler. 4. Fliigel.

die ca. den dritten Theil der Kopfbreite eimnehmende Stirn (9 :29) getrennt. Facetten

beim Minnchen grober als beim Weibchen. Untergesicht gewolbt, vorstehend, eme

kurze stumpfe Schnauze bildend. Scheitel schwach entwickelt, Hinterkopf etwas aus-

gehdhlt. Schlifenrand nur beim Weibchen und auch da schwach entwickelt. Fiihler

(Fig. 3) auf die Unterseite des Kopfes geriickt, vorstehend, divergierend, ca. so lang

wie der Kopf, in beiden Geschlechtern gleich gebaut. Das erste Glied verlingert,

stabenformig, das zweite nur etwas kiirzer als das erste, gegen das Ende zu verdickt

Complex des dritten Gliedes linger als die zwei Basalglieder zusammen, die einzelnen

KERTESZ—DIPTERA, STRATIOMYITD 97

Glieder sehr undeutlich; Griffel sehr kurz. Nach einem mikroskopischen Priiparate

ist der Complex fiinfringelig, sehr kurz, aber dicht behaart. Mundéffnung sehr gross ;

Riissel stark entwickelt, gekniet. Thoraxriicken flachgewélbt, linger als breit. Schild-

chen schwachgewdolbt, kurz, trapezformig, etwas aufgerichtet, mit zwei divergirenden

Dornen, deren Liinge die des Schildchens fast erreicht. Hinterleib flach, von oben

gesehen fast kreisformig, breiter als der Thorax. Fliigel (Fig. 4) iiber den Hinterleib

hinausragend. Vorderast der Radialis vorhanden, in die Randader miindend, der

Hinterast fehlt. Der obere Arm des Vorderastes der Discoidalis ist nur an der

aussersten Basis deutlich, der untere Arm dagegen gut entwickelt ; der Hinterast der

Discoidalis fehlt vollstiindig ; hintere Discoidalquerader vorhanden, wesshalb der schwache

Vorderast der Posticalis aus der Basal-Discoidalzelle entspringen scheint. Beine einfach,

ziemlich lang.

6. Catatasis clypeata, nov. spec. $9.

$. Filer, Stirn und Hinterkopf schwarz. Untergesicht mehr schwarzbraun, Spitze

der Schnauze hellbraun. Auf der Unterseite des Kopfes ziemlich lange gelbliche Haare.

Thorax schwarz, der Riicken mit sehr dichter tomentartiger Behaarung bedeckt.

Pleuren mit zerstreut stehenden weissen Haaren. Schildchen schwarz, mit gleichfirbiger

ziemlich langer Behaarung. Dornen hellgelb. Hinterleib schwarzbraun, in der Mitte

heller, ziemlich glinzend, an den Seiten mit langen gelblichweissen Haaren; an den

Tergiten kurz dicht schwarz behaart, welche Behaarung aber die Grundfarbe und den

Glanz garnicht alterirt. An den Sterniten sind die Haare gelblich. Beine hell briun-

lichgelb, die Schienen, besonders auf der distalen Hialfte, dunkelbraun und die drei

letzten Tarsenglieder fast schwarz. Auf der Unterseite der Vorderschenkel sind einige

Reihen weicher gelblicher Haare sichtbar, deren Liinge gegen die Spitze zu abnimmt ;

auf den Mittelschenkeln ist eine tihnliche Behaarung sichtbar, die Haare sind aber

alle gleichlang; auf den Hinterschenkeln sind nur an der Basis einige Haare zu

bemerken. Fliigel ziemlich hyalin, mit hellbraunen Adern und gleichgefirbter Sub-

costalzelle. Schwinger gelb.

?. Stirn glinzendschwarz, am Augenrande mit gelblichen Hiirchen ; auf der Mitte

beiderseits eine seichte Vertiefung und unter dieser je ein niederer Hicker; von den

Héckern reicht eine rinnenartige Vertiefung bis zu den Fiihlern. Der ganze vordere

Theil des Untergesichtes ist hell briunlichgelb, die Seiten glinzendschwarz, mit silber-

weisser Behaarung auf der Mitte. Thoraxriicken und Schildchen mit kurzem gold-

gelblichem, nicht sehr dichtem Tomente bedeckt. Hinterecken des 3—5 Ringes

braungelb. Alle Beine hell briiunlichgelb, auch die Hinterschienen und von den

Tarsengliedern sind nur die zwei letzten dunkelbraun, das drittletzte nur an der Spitze.

Schwinger briiunlich, der Knopf griin.

Linge: 5—5'5 mm.; Fliigelliinge: 4°5 mm.

Fundorte. Seychelles: Mahé, Cascade Estate, circa 800 Fuss, II].—III. 1909:

“hovers in shade under big trees” (H. Scott).

SECOND SERIES—ZOOLOGY, VOL. XV. 13

98 PERCY SLADEN TRUST EXPEDITION

Sargine.

Sareus, Fabricius, Suppl. Entom. Syst. 549, 1798.

7. Sargus* seychellensis, nov. spec. ff.

g. Stirn ausserordentlich schmal, schwarz, wenig gliinzend; die nackten Augen

fast zusammenstossend. Stirndreieck und Untergesicht weiss, mit gleichfirbiger Be-

haarung. Im Profile betrachtet steht das Stirndreieck und das Untergesicht nur

wenig vor. Die Punktaugen sitzen ganz hinten am Scheitel, das erste nur wenig

vorgeriickt. Punktaugenhécker nur sehr wenig erhaben. Scheitel mit gelblichen

Haaren, die Franze am hinteren Theil des Scheitels auch gelblich. Hinterer Augenrand

nackt, nur am untersten Theil einige weisse Haare. Riissel orangegelb, kurz weiss

behaart. Basalglieder der Fiithler gelblichweiss, der kleime Complex des dritten Fiihler-

gliedes_ briiunlichgelb; die Borste fast endstindig, am Spitzendrittel heller. Die

Bérstchen am oberen und unteren Theil des zweiten Fiihlergliedes erreichen nicht die —

Spitze des Complexes. Hinterkopf stark ausgehéhlt, mattschwarz, in gewisser Richtung

grau erscheinend. Thoraxriicken, Schildchen und Metanotum glinzend metallischgriin,

in gewisser Beleichtung bliiulichgriin, sehr fein punktirt, mit kurzer gelblicher Be-

haarung, der einige etwas lingere Haare beigemengt sind. Humeralcallus, die Noto-

pleuralnaht, der Postalarcallus und der grésste Theil der Pleuren briiunlichgelb; nur

der mittlere Theil der Mesopleura in grosser Ausdehnung und die Sternopleura sind

gliinzend bliiulichschwarz. Beine hell briiunlichgelb bis orangegelb, nur die Basis der

Hinterschienen (ca. 4) und alle Tarsen, mit Ausnahme der Basis des Metatarsus,

dunkelbraun. Bei einem Exemplar sind die Spitzen der Schenkel, die Basis der

Mittelschienen und die Hinterschienen am Ende auch gebriunt. Die Behaarung zeigt

keine Eigenthiimlichkeiten. Hinterleib sehr schmal, ca. doppelt so lang als der Thorax.

Tergite dunkel purpurviolett, Basaldrittel des ersten, die Seitenriinder simmtlicher

Tergite gelb; am ersten und zweiten Tergit ist die Behaarung ziemlich gleichmissig,

am 3—5 ist sie am distalen Theil dichter. Die Sternite sind bliulich, wenig glinzend ;

Basis des ersten, die Hinterrinder simmtlicher sowie der Seitenrand hell orangegelb. —

Die Genitalien bilden ein kugelférmiges Gebilde von gelber Farbe, mit zwei kurzen

etwas dunkleren Lamellen. Fliigel hyalin, die Spitzenhiilfte schwach gebriiunt ; Adern

dunkelbraun, Stigma heller. Schwinger gelb, der Knopf heller.

Linge: 8mm.; Fliigellinge: 7°6 mm.

@?. In den Hauptmerkmalen mit dem Miénnchen iibereinstimmend. Stirn ca.

den 4 Theil der Kopfbreite einnehmend (8 : 42), fast parallelrandig, nur am unteren

Theil etwas divergirend ; der obere Theil und der Scheitel schwarz, gliinzend, schwiirz-

lich behaart, mit einer schmalen Mittelfurche, deren Rinder am Scheitel divergiren

und an den Seiten des Ocellendreieckes verlaufen; der untere Theil und das Unter-

gesicht weissgelb, ziemlich glinzend, hellgelb behaart. An der Grenze, wo die schwarze

und weissgelbe Farbe sich treffen, ist ein Quereindruck vorhanden. Fiihler entschiede:

* Die Gattungen der Sarginen-Gruppe miissen einer Revision unterzogen werden um die richtige Nomen-

clatur feststellen zu kénnen. Bis ich diese Revision vornehme, will ich keine Anderungen machen.

KERTESZ—DIPTERA, STRATIOMYIID Se)

grésser als beim Mannchen, braun, Thorax dem des Minnchens ahnlich gefiirbt, an

den Pleuren ist aber die schwarzblaue Farbe mehr ausgedehnt nur auch am vorderen

Theil der Pteropleura ist ein iihnlich gefiirbter Fleck sichtbar. Hinterleib von ver-

schiedener Breite, metallisch bliulichgriin oder purpurviolett, sonst wie beim Minnchen.

Genitalien briunlichgelb, die kleinen Lamellen schwarz. Beine wie die des Minnchens

gefiirbt, auch was die Variation anbelangt.

Linge: 8°5—10 mm.; Fliigelliinge: 8—9°5 mm.

Fundorte. Seychelles: Marie Anne Island (3. XII. 1908); Silhouette, Plateau des

Mare aux Cochons, circa 1100 Fuss, [X. 1908; Mahé, Cascade Estate, circa 1000 Fuss,

1908 and 1909.

CEPHALOCHRYSA, nov. gen.

Die Gattung steht Microchrysa Lw. am niichsten, von der sie sich durch die

Grésse der hieher gehérenden Arten, durch die gleiche Farbung beider Geschlechter,

durch das dunkle Geiider (besonders der Discoidaladern und des Vorderastes der Posti-

ealis) sowie durch die tiber den Fiihlern liegende, die ganze Breite der Stirn einnehmende,

mehrweniger erhabene weisse Querbinde unterscheidet. Charakteristisch sind: der sehr

breite Kopf und der verhiltnismiissig kurze Hinterleib. Der Habitus erinnert an

Chloromyia formosa Scop.

Eine vollsténdige Beschreibung der Gattung und der Arten werde ich erst dann

geben ko6nnen, wenn ich die Gruppe der Sarginen eingehend studirt habe.

Als typische Art betrachte ich

8. Cephalochrysa hovas* (Big.), 2¢, Ann. Soc. ent. France, Sér. 3. vii. 133, 1859,

und Sér. 5. ix. 187, 1879.

Bigot hat die Art als Sargus (Chrysonotus) von Madagaskar beschrieben. Es

legen mir Exemplare von Silhouette (Hochwald, VIII. 1908), und Mahé (Cascade

Estate, X. 1908—TI. 1909) vor.

Ldnge: 7—9°5 mm.; Fliigellinge: 5°5—7°5 mm.

In diese Gattung ist auch Chloromyia stigmatica v.d. Wulp. aus Neu-Guinea

einzureihen.

Microcurysa, Loew, Verh. zool.-bot. Ver. Wien, v. 146, 1855.

9. Microchrysa flaviventris (Wied.), 39.

Sargus flaviventris, Wied., Aussereurop. Zweifl. Ins. i. 40, 1830.

Fundorte. Seychelles: Mahé, Cascade Estate, cirea 800 Fuss, I—II. 1909, und

Port Victoria, II. 1909. S. Asia, Manila, Arch. Ind., Neu-Guinea.

* More than once I noticed Cephalochrysa hovas settling on damp decaying felled trees in the mountain-

forests. On one occasion a specimen was observed settling on the decaying head of a felled Verschaffeltia-palm

(Silhouette, 1500 feet, VIII. 1908), in the rotting central part of which were a number of Stratiomyiid larve.

These may well have been the larve of this species; some were preserved in spirit and may be investigated

later.—Hvueu Scorr.

13—2

No. VII.—DIPTERA, BORBORIDA FROM SEYCHELLES.

By James E. Coxuin, F.E.S.

(CommunicateD By Pror. J. Srantey Garpiner, M.A., F.R.S., F.L.S.)

Read 15th June, 1911.

Limosina Macquart, Suit. & Buff. . 571, 1835.

1. Limosina acrostichalis Becker, Mitth. zool. Mus. Berlin, ii. 126, 1903.

Belongs to the group of species with more than four strong marginal scutellar bristles,

with incurved bristles on the thorax, and with a long bristle on the middle trochanter”.

It has six strong marginal bristles, also a number of small discal bristles on the scutellum,

and one humeral and another bristle on the front of the thorax in a line with the dorso-

central row, incurved. Becker does not mention these incurved bristles in describing the

species.

Three males and five females.

Locality. Mahé: Cascade Estate, about 800 feet and over, X. 1908—I. 1909; near

Morne Blanc, X.—XI. 1908.

Also recorded from Egypt and the Canary Isles (Becker), and I have seen specimens

from Madagascar.

2. Limosina ferruginata Stenhammer, Kongl. Vet. Akad. Handl. Ixxiv. 397, 1853

but published in 1855.

Undoubtedly the same as the European species and probably the same as the

_ Borborus illotus of Williston from the Island of St Vincent (West Indies).

Two males and two females.

Locality. Mahé: Cascade Estate, about 800—1500 feet, 1909.

Also recorded from the Canary Isles (Becker).

3. LInmosina hirtula Rondani, Boll. Soc. Ent. Ital. xii. 40, 1880.

Belongs to the group of species with the dise of the scutellum uniformly bristly,

containing ferruginata Stenh., acutangula Zett., albipennis Rond., litoralis Stenh.,

vagans Hal., hirtula Rond., lugubris Hal., and thalhammeri Strobl; ferruginata is of

a reddish-brown colour, acutangula quite distinct in the venation of the male, the next

three have the second costal segment longer than the third, and the last three the second

costal segment equal to or shorter than the third ; thalhammeri I believe to be a synonym

* Attention was first called to this group in Ent. Month. Mag. 1902, p. 59 under the description of

Limosina halidayi.

102 PERCY SLADEN TRUST EXPEDITION

of dugubris Hal., a species not uncommon in England, the Seychelles species, however, is

certainly distinct from /ugubris and may be hirtula which has been recognised by Becker

from North African specimens. Compared with lugubris it has paler legs, clearer wings,

antennze more uniformly brownish-yellow (in lugubris $ the third joint is brown above and

yellowish beneath), the cubital vein is slightly but distinctly upcurved (in lugubris it is

practically straight), the hypopygium is smaller, less bristly, and the bristles at the hind

corners of the abdominal segments longer, those on the last segment reaching beyond the

end of the hypopygium, and the hindmargins of the ventral plates in the male do not

bear the conspicuous short bristles present in lugubris.

Seventeen males and thirty-eight females.

Locality. Mahé: Cascade Estate, about 800—1500 feet, X. 1908—I. 1909.

4. Inmosina curvinervis Stenhammer, Kongl. Vet. Akad. Handl. lxxiv. 406, 1853

but published in 1855.

Synonym: Limosina roralis Rondani, Boll. Soc. Ent. Ital. xii. 37, 1880.

This species is closely allied to L. fontinalis Fallén, but is smaller and the acrostichal

bristles on the thorax are all equally small. Stenhammer does not mention the number of

scutellar bristles, but an immature specimen in the Swedish General Collection at

Stockholm labelled “Oel” and ‘“ Hgn” (and therefore probably Stenhammer’s type) has

eight bristles as in fontimalis and is identical with the species recorded as British under

the name L. roralis Rondani, and with specimens in Bigot’s Collection under that name

which bear a blue label “Type” and were probably sent to Bigot by Rondani. The —

Seychelles specimens entirely agree with British specimens, with the possible exception

that in the latter the second costal segment may be slightly longer in proportion to the

third.

One male and seven females.

Locality. Silhouette: Mare aux Cochons and forest immediately above, 1400—

2000 feet, IX. 1908. Mahé: Cascade Estate, about 800 feet and over, X. 1908—I.

1909; near Morne Blanc, X.—XI. 1908; marshy ground near sea-level, Cascade, 20.

II. 1909; Anonyme Island from grass, ferns, trees, etc., I. 1909.

5. Lnmosina punctipennis (Wiedemann), Auss. Zweifl. Ins. 1. 599, 1830.

Synonyms: Limosina angulata Thomson, Eugena Resa, 602, 1868.

Borborus venalicus Osten Sacken, Cat. Dipt. N. Amer., 2nd Ed. 263, 1878.

A very handsome and distinct species, four scutellar bristles only, two pairs of dorso-

central bristles on the thorax, sternopleural bristle small, front femora ($) somewhat

curved and dilated with soft pubescence beneath, front tibiee and tarsi ($) with an

outstanding postero-ventral ciliation of soft fine hairs.

A large number of specimens, the majority females.

Locality. Silhouette: jungle, 1500 feet, from dung. Mahé: country above Port

Glaud, about 500—1000 feet, 5. XI. 1908; Cascade Estate, about 800 feet and over,

X. 1908—I. 1909; near Morne Blane, XI.—XII. 1908; Mare aux Cochons district, about

1500 feet, 26. I—2. II. 1909; Anonyme Island on seaweed, I. 1909.

COLLIN—DIPTERA, BORBORID 103

Also recorded from East Indies (Wied.), Africa (Lw.), Cuba (O.-Sack.), Brazil and

St Vincent (Thoms. and Willist.).

6. Lnmosina munda, n. sp.

_A brightly shining black species with ample brownish wings and pale yellow legs.

$9. Head broader than long with moderately large eyes, frons and face brilliantly

shining, the former broader than long and with very few bristles, viz. one pair of ocellar,

two pairs of vertical and two pairs fronto-orbital, the front one being weak. Face nearly

straight in profile, the large and wide inter-antennal keel being softly rounded off in all

directions, jowls about one-third the heighth of eye. Antennze placed wide apart and

strongly divaricate, basal joint minute, second long, being quite as long as the third joint

which bears soft pubescence, arista minutely pubescent about twice as long as the

antenna.

Thorax shining black, rounded, with only two pairs of dorso-central bristles, the

other bristles on the dise being very small, scattered and few in number; in some lights

there are indications of a sparse yellowish tomentum. Pleure and scutellum shining

black, the latter rounded, semicircular and with four marginal bristles only.

Abdomen long ovate, shining black but somewhat rugose, bearing a few scattered

hairs but no bristles ; the first segment is very short, the second and third long, forming

the major portion of the abdomen, the fourth about half the length. of the third and the

fifth shorter still; hypopygium globular and subterminal.

Legs pale yellow, the front tibize and tarsi and the extreme knees of the posterior legs

slightly brownish ; second joint of hind tarsi one and a half times the length of the first and

slightly dilated ; bristles on middle tibiee very few and small, one or two above before the

middle and two or three apical, none beneath.

Wings longer than the abdomen, uniformly tinged with brownish-yellow ; costal

ciliation at base of wing very minute; cubital vein nearly straight, ending practically

at wing tip; second costal segment but very little longer than the third; discal and

postical veins both continued beyond the postical cross-vein, the former somewhat indis-

tinctly nearly to the wing margin, the latter distinctly for about the length of the

eross-vein. Halteres whitish-yellow.

Length about 1°5 mm.

Two males, two females.

Locality. Mahé: near Morne Blanc, X. 1908; and the high forest of Morne Blanc

and Pilot, X.—XI. 1908.

Var. bracata, n. var.

Exactly like the type except for the darkened apical three-quarters of the middle,

and apical two-thirds of the hind, femora.

Three females.

Locality. Mahé: high forest of Morne Blanc and Pilot, X.—XI. 1908 ; and Cascade

Estate, about 800—1500 feet.

104 PERCY SLADEN TRUST EXPEDITION

7. Limosina clunipes (Meigen), Syst. Beschr. Dipt. vi. 208, 1830.

The specimens appear to agree in all particulars with the European species.

Two males, two females.

Locality. Mahé: Cascade Estate, III. 1909.

8. Limosina brachystoma Stenhammer, Kongl. Vet. Akad. Handl. Ixxiv. 393, 1853

but published in 1855.

I cannot separate the specimens from those occurring on seaweed on the south coast

of England.

Numerous specimens of both sexes.

Locality. Mahé: from seaweed at Anonyme Island, i. 1909.

9. Limosina sp. ?

A single male specimen gummed to card, closely allied to the European L. heteroneura

Hal. in having a pale face and the cross-veins approximated, but differing in its more

shining thorax and more up curved cubital vein.

Locality. Mahé: Anonyme Island, 9. I. 1909.

No. VIII.—DIPTERA, PHORIDA FROM SEYCHELLES.

By James E. Cottin, F.E.S.

(Plate 5.)

(CommunicaTED BY Pror. J. Srantey Garpiner, M.A., F.R.S., F.LS.)

Read 15th June, 1911.

CuonocePHALus Wandolleck, Zool. Jahrb. Syst. xi. 428, 1898.

1. Chonocephalus similis Brues, Ann. Mus. Nat. Hung. ii. 554, 1905.

$. Brues described this species from a single male collected at Matheran, Bombay,

India, and there is little to add to his description except that I believe the mesopleura

bears a few hairs, the hypopygium also bears a number of longish hairs each side curving

downwards and inwards. The middle tibize often appear to be flattened and of a whitish

colour (possibly only the result of immaturity).

9. Very similar to Brues’ figure of C. kiboshoénsis, the whole insect being of a

chestnut brown colour, darker about the hind margins of the abdominal segments and

paler about the centre of frons ; the legs yellowish. The pubescence of the arista is much

longer than in Brues’ figure and the eyes slightly larger; the bristles on the abdomen are

not limited to the hind margins of the segments. The pubescence on the frons is rather

longer round the antennal fovez, one especially long hair being placed above the antennal

fovea in front of the eye, and another one below this fovea almost in front of the eye but

‘slightly lower. The palpi bear a long hair at the tip.

Chonocephalus mexicanus Silvestri (Boll. Lab. Zool. della Scuola d’Agric. Portici v.

172, 1911) agrees in the cheetotaxy of the head and in general coloration with the above

females and may represent the same species.

Locality. Silhouette: from near Morne Pot-i-eau, about 1500 feet, on rotting fruit,

VIII. 1908 (eleven females). Mahé: Cascade Estate, about 800 feet and over (fourteen

males, one female).

Also known from India (Matheran, near Bombay).

2. Chonocephalus sp. ? ¢.

A headless male specimen from Mahé, Cascade Estate, about 800—1500 feet, 1909,

must belong to a different species; the mesopleure are bare, the basal pair of scutellar

bristles are reduced to fine hairs, the wings are longer, the subcostal vein does not fade

away but ends in the costa, and all the thin veins are very distinct, the first thin vein

being distinct right back to its origin at the end of the cubital, the second thin vein is not

so straight and ends at a point less than a third the distance from the end of the first to

SECOND SERIES—-ZOOLOGY, VOL. XV. 14

106 PERCY SLADEN TRUST EXPEDITION

the end of the third thin veins, the hypopygium is different, bears a long dark anal

process and is without the long curved hairs; the hind tarsi are not so stout.

Can this be the male of C. kiboshoénsis Brues described from a single female collected

at Kibosho, German East Africa ?

DournipHorA Dahl, SB. Ges. naturf. Berlin 1898, No. 10, p. 188.

3. Dohrniphora cleghorni (Bigot), Indian Museum Notes, i. No. 4, p. 191, 1890.

(Plate 5, fig. 1.)

3. Agreeing with Bigot’s description of the female to which may ke added that the

frons is dark brownish-black slightly shining, arista microscopically pubescent, palpi

bearing 4—5 bristles at the tip only.

Thorax reddish-brown to brownish-black, scutellum very wide and short with one

strong bristle and one minute hair each side near the base, prothorax with one strong

bristle pointing up to the humerus, mesopleura running into the humerus without any

appreciable suture except for the prothoracic stigma and bearing the same pubescence

along its upper half as is borne by the humerus.

Abdomen with the first two segments reddish-yellow, the hind margins dull blackish,

wider on the second than on the first segment, and almost interrupted at the middle; the

third to fifth segments are dull black with a triangular reddish-yellow mark on the base of

each segment, the apex of the triangle almost reaching the hind margin ; sixth segment

somewhat longer, broadly yellowish on the base and dull black on the hind margin; the

hypopygium is hidden when viewed from above but projects considerably below; the long —

yellow anal organ arises from out of a short yellow cup-like process just beneath the hind

margin of the sixth segment.

Legs with the hind femora bearing beneath at the extreme base on the side nearest

the abdomen a little clump of about 3—5 short stout black bristles; hind tibize bare

except at the extreme tip, where there is on the upper side one short bristle and beneath

one long and 2—3 short spurs.

Wings with the costa reaching quite to middle of wing, ciliation extremely short and .

fine, only an indication of a mediastinal vein, subcostal ending close to the cubital which

is forked, the fork being very acute (fig. 1).

?. The three female specimens in Bigot’s Collection are in bad condition, being

immature, gummed to slips of talc, and have every appearance of having been originally

preserved in spirit ; they each bear a label, ‘‘ Phora Cotesi ex larva Tachinidarum parasit.

Seric. mori — n. sp. Calcutta J. B.”, and there can be little doubt are the type specimens, —

Bigot having on other occasions omitted to re-label his type specimens with the name he

ultimately gave the species when describing it. These specimens agree so accurately

with the Seychelles males in the exceedingly short costal ciliation, in the relative positions

of the ends of subcostal and cubital veins, in the absence of any bristle or ciliation to the

hind tibize above (only differing in the sexual characters of an elongate proboscis, simple

hind femora, and differently shaped and coloured abdomen), that I do not hesitate in

considering them sexes of the same species.

COLLIN—DIPTERA, PHORIDAY FROM SEYCHELLES 107

Locality. Mahé: Cascade Estate, about 800 feet and over, X. 1908—I. 1909; coast

marsh at Port Glaud, 5. XI. 1908. Two males.

Also known from India (Calcutta).

I should have considered this species a synonym of D. dohrni Dahl if Becker had not

stated that the hind tibis in that species were ciliated with fine bristles as in his Group II

(Aphiocheta Brues). Phora chlorogastra Becker, according to the description, appears to

agree in a remarkable manner with the Seychelles males and is possibly a synonym; it

has been considered (Kertesz Katalog. Dipt., vol. vii. 1910) only a variety of D. divaricata

Aldrich, which, however, with its var. perplexa Brues was described as having the

“abdomen black or brown, the posterior margin of each segment with a narrow band

of light yellow, which continues more or less as a stripe down the middle of the dorsal

surface,” and one would gather from the description that the costal ciliation was longer.

There are no other species with bare hind tibiz in the genus Dohrniphora.

4. Dohrniphora sp. ? ¢ (Plate 5, fig. 2).

A single female from Mahé: forest above Mare aux Cochons, 2. IX. 1908, though

having a long proboscis differs from eleghorni in the slightly longer ciliation to the costa

(fig. 2), the somewhat shorter subcostal vein and in the presence of a distinct bristle on

the hind tibize just outside the seam about one-third from the base. The abdomen is

entirely brownish-black, the hind margins very narrowly whitish.

The only other described species of Dohrniphora with a single bristle at the basal

third of hind tibie is D. papuana Brues from New Guinea, but this has the female

proboscis of normal length.

ApuHiocH&TA Brues, Trans. Amer. Ent. Soc. xxix. 337, 1903.

Table of Species.

1 (4) Cubital vein simple (fig. 3).

2(3) Frontal bristles normal, mesopleura bristly, first three joints of front tarsi in the

female very wide and flattened, and ovipositor chitinous and terminating

style-like. aculeipes, n. sp. ¢.

3(2) The inner bristles of lower frontal row placed in front of the outer bristles and

near the eye margin, mesopleura bare, front tarsi of the female and ovipositor

normal. mera, . sp. &.

4(1) Cubital vein forked.

5 (30) Costal ciliation short (figs. 3—11).

6 (13) Scutellum with four distinct bristles.

7(8) Costal ciliation extremely short (fig. 4), hind tibize bare, halteres brownish or

black. limbata Brues, 29.

8(7) Costal ciliation not extremely short.

9(10) Costa extending well beyond middle of wing (fig. 5), larger species, halteres

yellow. egena, n. sp. .

14—2

108 PERCY SLADEN TRUST EXPEDITION

10 (9) Costa barely reaching middle of wing or distinctly short of the middle.

11 (12) Costa barely reaching middle of wing (fig. 6), halteres brownish.

viduata, n. sp. 2.

12 (11) Costa ending distinctly short of middle of wing (fig. 7), halteres yellow.

imnocens, D. Sp. %.

13 (6) Scutellum with only two distinct bristles.

14 (29) Subcostal and cubital veins of normal stoutness.

15 (28) Halteres brown or black.

16 (19) Costa extending far beyond the middle of wing (fig. 8).

17 (18) Mesopleura bristly, inner bristles of lower frontal row placed in front of the outer

bristles and near the eye margin. extans, n. sp. S$.

18 (17) Mesopleura bare, lower frontal row of bristles normal. consueta, n. sp. S9.

19 (16) Costa not reaching middle of wing or only slightly exceeding it.

20 (27) Mesopleura bare.

21 (22) Arista short (not longer than the frons), only one pair of supra-antennal bristles,

yellowish species. brevis, n. sp. 3. —

22 (21) Arista of normal length (longer than frons).

23 (24) Posterior tarsi of male with the last joint dilated, fork of cubital vein large, the

upper branch being more upright than usual (fig. 9). planipes, n. sp. 39.

24 (23) Last joint of posterior tarsi normal, fork of the cubital vein smaller and more

acute (fig. 10).

25 (26) Frons dull, inner bristles of lower frontal row placed in front of outer bristles and

near the eye margin. spreta, n. sp. 3%.

26 (25) Frons shining, frontal bristles normal. frontata, n. sp. 3g.

27 (20) Mesopleura bristly, costa ending distinctly short of middle of wing. .

invenusta, n. sp. 3g.

28 (15) Halteres yellow, mesopleura bare, costa ending distinctly short of middle of

wing. media, n. sp. 3.

29 (14) Subcostal and cubital veins greatly thickened, fork indistinct (fig. 11), halteres .

black. latinervis, n. sp. 3.

30 (5) Costal ciliation long (fig. 12), mesopleura bristly, halteres yellow. ;

soluta, n. sp $9.

5. Aphiocheta aculeipes, n. sp. (Plate 5, fig. 3). i.

Yellowish species, cubital vein simple, mesopleura bristly, tarsi pointed and the fire

three joints of the front tarsi in the female widely dilated and flattened. iN

g. Head yellow, ocellar triangle slightly darkened ; frons wider than long, bristles

normal, upper pair of supra-antennal bristles stronger and wider apart than lower pair;

antenne yellow, somewhat large, arista more than twice the length of the frons ; palpi

yellow.

COLLIN—DIPTERA, PHORIDAY FROM SEYCHELLES 109

Thorax yellow, with a tendency towards a brownish-yellow central stripe and similarly

coloured patches between this stripe, the humerus and the root of the wing; scutellum

distinctly brownish with a pair of strong bristles and another pair of minute bristles nearer

the base; one pair of small dorso-central bristles; pleurze with brownish-yellow patches below

the dorso-pleural suture, especially beneath the root of the wing and beneath the post-alar

callus; mesopleura with a few bristles on the upper hind corner ; metanotum yellow.

Abdomen brownish-yellow with dull dark brown sides to the segments and narrow pale

yellow hind margins, sixth segment entirely dull dark brown except for the narrow hind

margin; indications exist of a brownish central stripe down the abdomen. Hypopygium

small and inconspicuous, but anal process large, pale yellow, nearly as long as the sixth

abdominal segment.

Legs whitish yellow, especially the anterior pairs; hind femora darkened at the tip

and without any long hairs at the base beneath ; tarsi pointed, z.e. last joint no wider than

penultimate joint and ungues very minute, middle tibize with one long spur, hind tibize

one short spur; cilia on hind tibize very weak.

Wings (fig. 3) with the costa not reaching to middle of wing and with short ciliation,

second thick (cubital) vein simple (not forked). Halteres pale yellow.

9. Like the male, but the first three joints of the front tarsi are remarkably flattened

and widened (Platychirus-like) on the outer or posterior side; the first joint is distinctly

wider than the tibia and a little more than twice as long as wide, the second joint is wider

still and but little longer than wide, the third is about the same width as the second but

hardly so long, the fourth joint is but little stouter than normal, while the last joint, like the

last joint of all the tarsi, is exceedingly pointed, the ungues and pulvilli being microscopic.

The sixth abdominal segment bears some long bristles round the hind margin, the

telescopic ovipositor is more heavily chitinized than usual in Phora and when fully

exposed is about twice as long as the sixth abdominal segment and gradually tapering

in width, towards the tip there appears to be a joint (about which a few short hairs are

visible) and beyond this joint it terminates in a short curved flattened style.

Length about 1°25 mm.

This species would probably be considered by Brues as belonging to his genus

Plastophora, but I do not consider the horny ovipositor, by itself, a generic character, while

in aculeipes the proboscis is not enlarged and horny as in the type of Brues genus.

A. formicarum Verr., which has been placed by Brues in the genus Plastophora, differs

from aculeipes among other characters in the arrangement of the frontal bristles (v. Ent.

Month. Mag., London, 1908, p. 168).

Locality, Mahé: Cascade Estate, about 800 feet and over, X. 1908—TI. 1909.

Twenty-three males, six females.

6. Aphiocheta mera, n. sp.

?. Frons greyish-black, longer than wide, outer bristles of lower frontal row placed

above the inner and equidistant from the eye margin, upper pair of supra-antennal bristles

placed wider apart than the smaller lower pair; antenne small, yellow, but brownish

above, arista short, not longer than the frons, face yellow, palpi pale yellow.

110 PERCY SLADEN TRUST EXPEDITION

Thorax reddish-yellow, scutellum with only two strong bristles, pleure yellow,

mesopleura bare.

Abdomen reddish-yellow on disc of second segment, reddish-brown on third

segment and gradually- getting darker till it is brownish-black at the tip. The

telescopic ovipositor normal, ending in the usual papille.

Legs yellow, with the hind knees and the seam of hind tibiz darkened, hind femora

with a few long hairs beneath at base, cilia on hind tibize distinct, tarsi simple and not

acutely pointed.

Wings resembling those of aculezpes, the cubital vein simple. Halteres not visible in

Length just exceeding | mm.

the specimen examined but probably pale.

Locality. Seychelles: exact locality unknown.

7. Aphiocheta limbata Brues, Ann. Mus. Nat. Hung. ii. 546, 1905. (Plate 5, fig. 4.)

Similar to A. viduata, but differing in its venation and the absence of cilia to the

hind tibize.

¢. Head black, frons about as long as wide, dull; upper pair of supra-antennal

bristles strong and wider apart than the small lower pair ; antennze fairly large, brownish-

yellow, arista long and distinctly pubescent ; palpi dirty yellow.

Thorax varying from black with a reddish tinge to reddish-brown, scutellum with

four bristles, the basal pair weaker than the apical; pleurze paler than the thorax,

mesopleura bare.

Abdomen deep dull black, sometimes with a slight reddish tinge, hypopygium

greyish, very small, inconspicuous, anal process very small, yellow.

Legs pale, hind legs darkened about the tip of the femora, middle coxze with a dark |

streak behind, hind tibize bare, no cilia visible though the usual black seam is present.

Wings (fig. 4) slightly darkened, venation as in figure, halteres brownish to black.

?. Like the male, indeed the two sexes are difficult to distinguish unless the female

ovipositor is exserted. ’

Length about 1 mm. f, to 1°5 mm. ¢.

I feel sure that I have correctly recognised Brues’ species and now for the first time —

describe the male which was unknown to Brues.

Locality. Silhouette: Forest above Mare aux Cochons, 2. 1X. 1908. Mahé: Cascade

Estate, about 800 feet and over; from near Morne Blanc, X.—XI. 1908; forest of rather

stunted ‘“‘ Capucin” trees (Northea), summit of “ Montagne Anse Major,” about 2000 feet,

1. II. 1909; Mare aux Cochons district, about 1500 feet, 26. L—2. II. 1909. Seventeen

males and forty-three females.

Also known from Matheran, East India (Brues).

8. Aphiocheta egena, n. sp. (Plate 5, fig. 5).

¢. Blackish-brown species with a tendency to red on the thorax and pleure; frons-

somewhat dull, slightly longer than broad, with a tendency to red, bristles normal, under

COLLIN—DIPTERA, PHORIDAY FROM SEYCHELLES 111

pair of supra-antennal bristles much smaller and rather closer together than the upper

pair, antenne very small, arista long and distinctly pubescent, palpi dirty yellow.

Thorax with one pair of dorso-central bristles, scutellum paler than the thorax with

four distinct strong bristles, mesopleura bare.

Abdomen dull blackish-brown, hind margins of segments often paler, terminal lamelle

yellow, second segment at basal corners with 2—3 strong bristles somewhat as in rufi-

cornis Mg., sixth segment with several long hind-marginal bristles.

Legs brownish-yellow, front legs paler, ciliation beneath hind femora at base consisting

of about 6—7 not very long curved hairs, cilia of hind tibize distinct, longest about the

middle of tibia.

Wings (fig. 5) with a brownish tinge, costa with a short fringe and reaching beyond

wing middle, subcostal vein ending about midway between humeral cross vein and end of

costa, fork small and acute, thin veins dark and distinct. Halteres yellow with brown

stems.

Length about 1°75 mm.

Locality. Silhouette: low coconut-planted country near the coast, Pointe Etienne,

17. IX. 1908. Mahé: high damp forest between Trois Fréres and Morne Seychellois,

about 1500—2000 feet, 9. and 10, XII. 1908; high forest of Morne Blanc and Pilot,

X.—XI. 1908; Morne Seychellois, over 1500 feet, 4. II 1909; Mare aux Cochons

district, about 1500 feet, 26. [—2. II. 1909; Cascade Estate. Eight females.

Note. g¢. What might be the male of this species is represented by a single

specimen from Mahé, high forest of Morne Blanc and Pilot (No. 111); it resembles the

female in general coloration, venation, arrangement of frontal bristles and cilia to hind

legs, but there are only two distinct scutellar bristles, the basal pair being very minute,

and the halteres are darker. The hypopygium is small and greyish in contrast with the

dull black abdomen and bears a single long bristle each side, the long anal organ is pale

yellow.

9. Aphocheta viduata, n. sp. (Plate 5, fig. 6).

Reddish-black species, scutellum with four bristles, mesopleura bare.

9. Head black; frons about as broad as long, dull; upper pair of supra-antennal

bristles strong, under pair minute; antennz small, reddish-brown, arista distinetly

pubescent ; palpi and proboscis yellow.

Thorax black but with a distinct tendency at times to a reddish tinge; scutellum

with four bristles, the basal pair weaker than the apical pair; pleure distinctly reddish,

palest towards the cox ; mesopleura bare.

Abdomen dull black sometimes with a reddish tinge.

Legs yellow, middle cox with a dark streak behind, hind legs darkened about the

tips of femora and tibi:e, cilia on hind tibize distinct but not strong.

Wings (fig. 6) very faintly brownish. Halteres dirty yellow.

Length 1—1:25 mm.

112 PERCY SLADEN TRUST EXPEDITION

The male of this species does not appear to be represented in the collection, though

the possibility of its having only two scutellar bristles has not been overlooked.

Locality. Mahé: Cascade Estate, about 800 feet and over, collected by H-

Thomasset and Hugh Scott, X. 1908—I. 1909; Mare aux Cochons district, about

1500 feet, 26. I.—2. II. 1909; Cascade Estate, about 800—1000 feet, 1909. Twenty-

five females. |

10. Aphiocheta innocens, n. sp. (Plate 5, fig. 7).

?. Frons greyish-black, dull and longer than broad, frontal bristles normal, upper

pair of supra-antennal bristles wider apart than the smaller lower pair, antennz small,

reddish-brown, palpi yellow.

Thorax black with a tendency to red, scutellum with four bristles though the basal

pair are weaker, mesopleura bare.

Abdomen black, slightly shining.

Legs yellow, hind pair slightly brownish, cilia to hind tibiae quite strong for so small

a species.

Wings (fig. 7) with costa less than half the length of wing and with short ciliation,

subcostal vein long, ending near the fork. Halteres yellow.

Length about 1 mm.

Locality. Silhouette: Mare aux Cochons and forest immediately above, IX. 1908;

Mahé: from near Morne Blanc, X.—XI. 1908; Mare aux Cochons district, about

1500 feet, 26. I.—2. II. 1909; Anonyme Island, from grass, ferns, trees, ete., I 1909.

Five females.

11. Aphiochata extans, n. sp. (Plate 5, fig. 8).

t. Head black, frons narrow, being longer than wide, dull and inclined to be reddish-

brown, the two bristles of the lower frontal row on each side of tbe frons are placed one

above the other almost equidistant from the eye margin, upper pair of supra-antennal

bristles larger and wider apart than lower pair, antennz small, reddish-brown, palpi and

proboscis yellow.

Thorax reddish-brown, paler about the post-alar calli, seutellum reddish-brown with

only one pair of bristles, pleure yellow, mesopleura with one very long stout bristle and

numerous minute ones, metanotum reddish-brown. ,

Abdomen with the first two segments reddish-yellow, with reddish-brown hind

margins, narrow on the first segment but widening into a triangular central stripe on the

second segment : this segment bears 3—4 bristles at each hind corner as in ruficornis Mg,

third to the fifth segments dull blackish-brown with reddish hind margins spreading

upwards on to the disc about the middle, sixth segment dull black with a reddish hind

margin bearing 83—4 longish bristles, hypopygium dark coloured, almost entirely hidden

beneath the sixth segment, anal organ long and pale.

Legs yellowish but hind femora darkened above and at the tip, the hind tibie

darkened along the seam and at the tip, hind femora with a few long curved hairs beneath

at the base, hind tibize with a cilia of about 8 strong bristles, middle tibiz. with a cilia

each side of the seam.

COLLIN—DIPTERA, PHORIDA) FROM SEYCHELLES 1138

Wings distinctly brownish, costa beyond the middle of wing and with a short ciliation

(fig. 8). Halteres black with pale stems.

?. Like the male but the first five abdominal segments are reddish-yellow, the first

with a dark hind margin and like the third and fifth darkened about the sides, the second

and fifth with a darkened central stripe, the fourth segment is somewhat abbreviated

at the sides.

Length, about 1°5 mm. 2, 1°8 mm. ?.

Locality. Mahé: high forest of Morne Blanc and Pilot, X.—XI. 1908; forest of rather

stunted “Capucin” trees (Northea), summit of “ Montagne Anse Major,” about 2000 feet,

1. II. 1909; Cascade Estate, about 800—1000 feet, II. 1909. One male, two females.

12. Aphiocheta consueta, n. sp.

$. Closely resembling A. extans but the frons is yellowish and the lower row of frontal

bristles is normal, the inner pair being placed near the upper supra-antennal bristles,

the lower pair of supra-antennal bristles are minute, being much smaller than in eatans.

Thorax and especially the scutellum somewhat paler than in extans and the meso-

pleura bare.

Abdominal markings differing from those of extans, the blackish-brown markings

occupy the hind corners of the second and the sides of the third and fourth segments,

spreading indistinctly along the hind margins of each of these segments, the fifth and

sixth segments gradually darken from yellowish to yellowish-brown, the hypopygium

which is not hidden beneath the sixth segment is blackish-brown.

Legs somewhat paler than in extans, only the hind femora at the tip being darkened,

the cilia on the hind tibiz shorter and more numerous, the middle tibize possess cilia on

each side of the seam.

Wings much like those of extans but the subcostal vein is a little shorter. Halteres

brownish with paler stems.

2. Like the male but the abdomen more extensively darkened, though the colour

of the abdomen may have been affected in the three specimens by their being gummed to

eard. The fourth abdominal segment is not abbreviated as in extans ¢.

Length about 1°75 mm. 3, 2 mm. ?.

Locality. Silhouette: Mare aux Cochons and forest near by, and just above,

1X. 1908. Mahé: Mare aux Cochons district, about 1500 feet, 26. I.—2. II. 1909;

marshes on coastal plain at Anse aux Pins and Anse Royale, 19—21. I. 1909. Three

males, three females.

Note. The male specimen mentioned in the note at the end of description of P. egena

would be located here by the Synoptic Table, but may be distinguished by its much

darker colour, entirely black abdomen, brownish wings, ete.

13. Aphiocheta brevis, n. sp.

?. Frons about as long as wide, yellowish but greyish about the upper part, frontal

bristles normal but only one pair of supra-antennal bristles, antennze moderately large,

yellow, somewhat obscured above, arista short, not exceeding the length of frons, palpi

pale yellow.

SECOND SERIES—ZOOLOGY, VOL. XV. 15

114 PERCY SLADEN TRUST EXPEDITION

Thorax yellow, scutellum with two strong bristles and two small hairs, pleura pale

yellow, mesopleura bare.

Abdomen reddish-brown, paler about the second segment.

Legs pale yellow, first joint of front tarsi equal in length to the next three joints

together, cilia to hind tibize not very distinct, consisting of six to eight bristles.

Wings with costa hardly reaching middle of wing, subcostal ending nearer to the end

of costa than to the humeral cross-vein, costal ciliation sparse, not very long (about same

length as in latinervis, fig. 11), fork fairly large, first thin vein evenly curved. Halteres

pale brownish.

Length about 1 mm.

Locality. Mahé: Cascade Estate, about 800—1500 feet. One female.

14. Aphiochata planipes, n. sp. (Plate 5, fig. 9).

In general appearance much resembling extans and consueta, but distinguished by the

venation and the dilated last joint of the posterior tarsi in the male.

4. Frons brownish-yellow to black, frontal bristles normal, under pair of supra-

antennal bristles very small, antennze and palpi yellow.

Thorax brownish-yellow, pleurz yellow, mesopleura bare, only two scutellar bristles.

Abdominal markings as in consueta but variable, the dark markings to the fourth

segment may be more restricted or even almost absent, but the hind margins of the fourth,

fifth and sixth segments are more or less darkened, hypopygium not hidden and with

large yellow anal organ.

Legs pale yellow, including the hind knees, posterior tarsi brownish towards the tip

and the last joint of all four tarsi dilated, that of the middle tarsi about twice as long as

the preceding joint and nearly twice as wide, that of the hind tarsi about as long as the

preceding joint and nearly twice the width, ungues and pulvilli minute. Cilia to hind —

tibize moderate, to middle tibize only present behind the seam.

Wings (fig. 9) differing from those of eatans and consueta in the shorter costa with

slightly longer ciliation, in the more open fork (the upper branch being more upright) and

in the first thin vein, being more upcurved at the tip. Halteres with yellow stems and

yellowish-brown knobs, at least towards the end.

?. Costa somewhat longer in proportion to length of wing and abdomen brownish-—

yellow to blackish-brown, always paler about the base of each segment; posterior tarsi

simple, the last joint only as wide as the preceding joint.

Length, ¢ about 1:75 mm., ? often not exceeding 1°5 mm.

Locality. Silhouette: Mare aux Cochons and forest above. Mahé: high forest of

Morne Blane and Pilot, X.—XI. 1908; Cascade Estate, about 800—1500 feet. Four

males, four females.

Note. About eight specimens, all except one gummed to card, differ from planipes

in having simple tarsi in the male, cubital fork smaller and more acute and thick veins’

nearer the costa. They must represent a distinct species, but as they do .not present

any striking character and are not in good condition I refrain from naming them.

COLLIN—DIPTERA, PHORIDA FROM SEYCHELLES 115

Locality. Silhouette: near Pot-a-eau, VIII. 1908 (two females); Mare aux Cochons,

IX. 1908 (one male); forest above Mare aux Cochons (four females). Mahé: country

above Port Glaud, about 500—1000 feet, 5. XI. 1908 (one female).

15. Aphiocheta spreta, n. sp. (Plate 5, fig. 10).

g. Frons greyish-black, longer than broad, inner bristle of lower frontal row placed

beneath the outer and almost as near the eye margin, upper pair of supra-antennal bristles

much wider apart than the very little shorter lower pair, antennz small, reddish-brown,

palpi yellow.

Thorax blackish-brown, scutellum with only two bristles, pleurze brownish-black,

getting paler towards the coxz, mesopleura bare.

Abdomen black with a greyish tinge in some lights, hypopygium small, greyish with a

short but stout greyish-yellow anal organ.

Legs yellow, front tarsi slender, hind femora somewhat darkened above with 3—4

long hairs beneath at the base, cilia to hind tibiz very distinct.

Wings (fig. 10) with short costal ciliation, subcostal vein ending nearer the end of

costa than to humeral cross-vein. Halteres dusky, more darkened above.

g. Very much like the male.

Length about 1°5 mm.

Locality. Mahé: from near Morne Blanc, X.—XI. 1908; Cascade Estate, about

800—1500 feet; scrubby forest vegetation, top of Mount Sebert, 1800 feet or more, I.

1909. Two males, one female.

16. Aphiocheta frontata, n. sp.

$. Frons longer than broad, shining black, upper pair of supra-antennal bristles

wider apart than the lower pair, antennz very small and dark, palpi yellow.

Thorax black, pleurz reddish-black, mesopleura bare, scutellum with only two

bristles.

Abdomen black with a greyish tinge in some lights, hypopygium small, bare, with

a short yellow anal organ.

Legs: front pair yellow with stout tarsi, middle legs with the femora darkened, hind

legs dark except for the yellowish trochanters, hind tibize with very distinct ciliation,

middle tibize with ciliation each side of seam.

Wings long and narrow, somewhat as in spreta but the costa extending beyond the

middle of wing, subcostal vein ending about half-way between the humeral cross-vein and

end of costa. Halteres black.

Length about 1°5 mm.

Locality, Mahé: Mare aux Cochons district, about 1500 feet. One male.

17. Aphiocheta invenusta, n. sp.

$. Frons greyish-black, if anything broader cha long, the inner bristles of lower

16—2

116 PERCY SLADEN TRUST EXPEDITION

frontal row placed beneath the outer but not so near the eye margin, upper pair of supra-

antennal bristles much wider apart than the but little smaller lower pair.

Thorax greyish-black, scutellum with only two distinct bristles, pleure brownish-

black, mesopleura with one long stout bristle and a number of minute ones.

Abdomen dull black, hypopygium greyish with a long curved bristle on each side

near the base and a long yellow anal organ.

Legs yellow, hind legs somewhat brownish, front tarsi long, cilia to hind tibize

indistinct.

Wings quite clear, much as in innocens but costal ciliation shorter, thin veins very

faint. Halteres blackish.

Length about 1 mm.

Locality. Mahé: Cascade Estate, about 800—1500 feet. One male.

Note. One male specimen, gummed to card, from the same locality, like invenusta has —

dark halteres and bristly mesopleura though I cannot trace the long stout bristle, but is

not much more than half the size of that species, has a narrower frons, wings not so clear,

thin veins more distinct, slightly longer costa, subcostal vein not ending quite so near the

fork and is probably a distinct species.

18. Aphiochata media, n. sp.

g. Frons greyish-black, about as wide as long, bristles normal though the outer

bristle of lower frontal row is placed somewhat above the inner, upper pair of supra-—

antennal bristles wider apart than the smaller lower pair, antennze small, yellowish,

obscured above, palpi yellow.

Thorax brownish-yellow, with only two scutellar bristles, pleurze yellow, mesopleura

bare.

Abdomen dull black with very narrow whitish-yellow hind margins to all segments,

and the basal and discal portion of all segments more or less brownish-red, hypopygium —

small and greyish, anal organ stout and yellow.

Legs yellow with hind knees obscured, front tarsi slender, hind femora with a few not

very long hairs beneath at base, cilia to hind tibize inconspicuous.

Wings with a yellow tinge, venation much as in tnnocens. Halteres yellow.

Length about ‘75 mm.

Locality. Mahé: Cascade Estate, about 800—1500 feet. Two males.

Note. Two specimens, No. 1 from Mahé, Cascade Estate, about 800 feet and over,

and No. 2, also from Mahé, Cascade Estate, though having pale halteres and bare pleuree

differ from media in their darker colour, and rather longer costa and from each other in

that No. 1 has a dull abdomen, somewhat stout front tarsi, longer costa with longer and

more scanty ciliation and subcostal vein ending only slightly more than half-way between

humeral cross-vein and end of costa; while No. 2 has somewhat shining abdomen, and

subcostal vein ending much nearer to end of costa than to humeral cross-vein.

19. Aphiocheta latinervis, n, sp. (Plate 5, fig. 11).

g. Frons greyish-black, longer than wide, inner bristles of lower frente row placed

COLLIN—DIPTERA, PHORIDAZ FROM SEYCHELLES 117

beneath the outer and near the eye margin, supra-antennal bristles almost equally large,

upper pair wider apart than the lower, antennz very small, brownish-black, palpi yellow.

Thorax brownish-black with a tendency to red, scutellum with only two strong

bristles, pleuree the colour of the thorax, mesopleura bristly.

Abdomen dull black, hind margin of the sixth segment and the somewhat hidden

hypopygium grey, anal organ short and grey.

Legs yellow, hind legs somewhat dusky, front tarsi stout, cilia on hind tibize

inconspicuous.

Wings (fig. 11) with the costa and second thick vein remarkably thickened and the

fork very indistinct. Halteres brownish-black.

Length about 1 mm.

Locality. Mahé: Anonyme Island, from grass, or ferns, or trees, I, 1909. One

male.

20. Aphiocheta soluta, n. sp. (Plate 5, fig. 12).

Frons black, somewhat shining, longer than broad, inner bristles of lower frontal row

placed almost immediately beneath the outer ones and close to the eye margin, upper pair

of supra-antennal bristles placed wider apart than the almost equally large lower pair,

antenne small, brownish-black, palpi dusky yellow.

Thorax with a tendency to red, scutellum with only one pair “of bristles, pleurze

brownish-yellow, mesopleura with a number of fine bristles and 1—2 stronger ones.

Abdomen black with a greyish gloss in some lights, hypopygiam small, not very

prominent, anal organ stout, dusky yellow.

Legs yellow with hind knees darkened, cilia to hind tibiz distinct, about 8—10 in

number, hind femora with a ciliation of about 7 long curved hairs at base beneath, front

tibiee somewhat thickened.

Wings (fig. 12) with long costal ciliation and narrow fork, first thin vein very evenly

eurved. Halteres yellow.

Length from 1°5 mm. g, to 2 mm. $.

Locality. Silhouette: forest above Mare aux Cochons, 2. IX. 1908. Mahé: Cascade

Estate, about 800 feet and over; high forest of Morne Blane and Pilot, X.—XI. 1908 ;

Mare aux Cochons district, about 1500 feet, 26. 2. II. 1909; serubby forest vegetation,

top of Mount Sebert, 1800 feet or more, I. 1909. Four males, twelve females.

Note 1. Two males from Mahé, Cascade Estate, about 800 feet and over are very

much like soluta but the lower row of frontal bristles are normally arranged, the meso-

pleura bears one strong bristle standing out distinct from the other minute bristles, the

hind femora at the base beneath bear a closely-set cilia of short curved hairs in the place

of the seven long curved hairs of soluta ~. The hind margins of the abdominal segments

are narrowly yellowish. It is probably a distinct species.

Note 2. There is probably yet another species near soluta in the collection, but

I refrain from naming it because the British species have taught me that this group is

a very difficult one and requires further study based upon long series.

118 PERCY SLADEN TRUST EXPEDITION

g. Resembling the last two, the lower row of frontal bristles normal but the two

inner bristles of this row placed nearer the outer bristles than in the last species, upper pair

of supra-antennal bristles not so wide apart as in either of the last two species, mesopleura

as in soluta, hind femora beneath with short hairs but not with a closely set cilia as in the

last species. Differing from each of the above species in having long bristles on the hind

margin of the sixth segment and about four long bristles on each side of the hypopygium,

and in the cilia to hind tibiz, being stronger especially about the middle of the tibia and

the legs somewhat darker in colour.

g. Resembling the male and differing from the female of soluta in the position of

the lower row of frontal bristles.

Locality. Mahé: Cascade Estate, about 800 feet and over; from near Morne Blanc,

X.—XI. 1908. Three males, one female.

EXPLANATION OF PLATE 5.

Fig. 1. Dohrniphora cleghorm, § costal margin of wing.

Fig. 2. Dohrniphora sp., 2 costal margin of wing.

Fig. 3. <Aphiocheta aculeipes, § wing. x 57.

Fig. 4. <Aphiocheta limbata, f° wing. x 66.

Fig. 5. Aphiocheta egena, ¢ wing. x 54.

Fig. 6. <Aphiocheta viduata, 2 wing. x 57.

Fig. 7. <Aphiochaeta innocens, 2 wing. x 57.

Fig. 8. Aphiocheta extans, 2? wing. x 45.

Fig. 9. Aphiocheta planipes, f° wing. x 51,

Fig. 10. Aphiocheta spreta, f wing. x 63.

Fig. 11. Aphiocheta latinervis, f wing. x 60.

Fig. 12. Aphiocheta soluta, 2 wing. x 48.

Percy SLADEN TRUST EXPEDITION. TRANS. LINN. Soc. SER.2.Z00L VoL. XV PL.5.

ee. (Couuin)

" E Wilson, Cambridge

DIPTERA — PHORIDAE

No. IX.—ON THE MYSIDACEA AND EUPHAUSIACEA COLLECTED

IN THE INDIAN OCEAN DURING 1905.

By W. M. Tartrersatt, D.Se., Keeper of the Manchester Museum.

(Plates 6 and 7.)

(CommunicaTep By Pror. J. StantEY Garpiner, M.A., F.R.S., F.L.S.)

Read 2nd March, 1911.

I am indebted to the courtesy of Professor Stanley Gardiner for the opportunity of

examining the collection of Schizopoda, with which the following account deals, made by

him in the Indian Ocean in the year 1905.

The collection is by far the largest individual one made in the Indian Ocean and

is a valuable addition to our knowledge of the Schizopod fauna of that sea. It contains

thirty-six species as against a total of thirty-two species, the sum of the results of

previous observations on this group of Crustacea in that locality. Only ten of the

species here recorded have hitherto been noted from the Indian Ocean so that the present

collection adds twenty-six species to its fauna and brings the total number of species of

Schizopoda known from these waters up to fifty-eight.

Much, however, still remains to be done, especially with regard to the Mysidacea,

before the Schizopod fauna of the Indian Ocean can be said to be completely or even

nearly elucidated. One had hoped that Professor Gardiner’s collection would have

thrown considerable light on the bottom living species of tropical Mysidacea but it

contained only one specimen, of a known species, of forms which fall into that category*.

Of pelagic Mysidacea the Sealark captured fourteen species, two of which are new

to science and belong to two genera recently instituted by Hansen for Szboga specimens.

Of the remainder, four are known only from the Siboga material while a fifth has hitherto

only been captured by the Valdivia expedition, naturally enough in the same locality as

by the Sealark.

As regards the Euphausiacea, Professor Gardiner was distinctly more successful. In

all twenty-two species were collected, a number which compares very favourably with the

total of twenty-five taken by the Siboga expedition.

* [We intentionally ran most of our dredgings on the edges of the banks we visited, while on their

surfaces we were particularly investigating upgrowing banks. The ground was generally rough and unsuitable

for catching Mysidacea. Our dredges also were built so as to bite deeply into the ground. In spite of these

facts I cannot understand the absence of ysidacea unless they are really scarce on these oceanic coral banks.

J. Stanley Gardiner. ]

120 PERCY SLADEN TRUST EXPEDITION

The Schizopod fauna of the Indian Ocean as evinced by the present collection

presents no very marked characteristics. No fewer than fourteen of the species of

Euphausiacea are common to both the Atlantic and Pacific Oceans. Of the remaining

eight, two, Stylocheiron elongatum and Kuphausia hemigibba are known only from the

Atlantic and Indian Oceans while the remaining six are Pacific forms. Of the My-

sidacea, the species of Gnathophausia and Eucopia and Euchetomera typica are

bathypelagic species of wide distribution and the surface form, Sirzella thompson, has

also an extensive range in the tropical and subtropical waters of the globe. Siriella

gracilis is, up till now, exclusively a Pacific species while the remainder are known only

from one or two records, all in the Pacific or Indian Oceans, so that their geographical

range cannot yet be said to be known.

In the preparation of this report I have received much valuable help from my friend

Dr H. J. Hansen. Through his courtesy I was allowed to see an advance proof of his

Siboga report and thereby saved the trouble of describing several new species therein

described and enabled to work over my collections with his latest views before me.

Evidence of the debt I owe to Dr Hansen will be found on almost every page of this

report and I wish to express to him my best thanks.

Order MYSIDACEA.

Sub-order LOPHOGASTRIDA.

Family Lophogastride.

Genus LopHoGAsTEr, M. Sars.

1. Lophogaster typicus, M. Sars, var.

Station®. South of the Saya de Malha Banks, 145 fms., one ovigerous female, 20 mm.

I have compared this specimen with British examples of the species and find the

following small points of difference :—

(1) The median-dorsal area of the carapace is finely punctate but there is an

entire absence of the coarser tubercular granules characteristic of northern specimens.

(2) The median fork of the rostral plate is the same length as the lateral forks

whereas in British specimens it is slightly longer.

(3) The rostral plate covers the greater part of the cornea of the eyes so that

the latter are much more hidden than in the more typical forms. It may also be noted,

though the character has no special importance, that the pigment of the eyes in the

present specimen is much paler than I have noticed in British examples of the species.

(4) The prominent lobe on the inner distal corner of the third joint of the

antennular peduncle, is slightly serrate on the margin, instead of smooth.

* The Stations where the different species were caught will be found recorded in Trans. Linn. Soc. London,

ser. 2, Zool., vol. xii. pp. 169—174,

TATTERSALL—MYSIDACEA AND EUPHAUSIACEA 121

There are six teeth, including the terminal one, on the outer margin of the antennal

scale while the structure and armature of the telson agree exactly with the type. Having

but one specimen from the Indian Ocean, I am unable to decide whether the small points

of difference, noted above, are constant and thus deserving of varietal or even specific

rank. The species has never before been recorded from the Indian Ocean but to judge

from Ortmann’s paper (1906) it has a very wide geographical distribution, practically

world-wide in temperate and tropical seas. The localities given by Sars in his Challenger

report and by Stebbing (1902), to the south of Cape Town, are the nearest to the Saya

de Malha Banks at which the species has been captured. It should be mentioned that

the present specimen has the ventral armature of the pleon, recently described by me

(1909) for Mediterranean specimens. Hansen (1910) has confirmed my observations on

a new species of the genus, L. intermedia, captured by the Stboga expedition in the

waters round the Netherland East Indies. Lophogaster was the only bottom-haunting

Schizopod captured by the Sealark.

Genus GnatHopHaAustA, Will.-Suhm.

2. Gnathophausia calcarata, G. O. Sars.

G. calcarata, G. O. Sars, 1883.

G. calcarata, G. O. Sars, 1885.

G. bengalensis, Wood-Mason, 1891.

G. calcarata, Ortmann, 1906.

Station. N., near the Chagos Archipelago, 0—600 fms., one, 26mm. from the eye

to the apex of the telson.

The epimeral plate of the sixth segment of the pleon agrees in form with that figured

_ by Ortmann (1906), pl. L., fig. 2a, for a specimen 42mm. long. The rostrum measures

12mm. from the level of the eyes to its apex. The postero-lateral spines of the carapace

extend to the middle of the telson and the posterior median dorsal spine to the third

segment of the pleon. The specimen is the smallest yet recorded for the species.

G. calearata is a widely distributed form in the Pacifie Ocean but the present record is

the most westerly one known for that ocean.

Family Eucopiide.

Genus Evucopta, Dana.

3. Hucopia unguiculata (Will.-Suhm).

Chalaraspis unguiculata, Will.-Suhm, 1875.

Eucopia australis (pars), G. O. Sars, 1885.

Eucopia unguiculata, Hansen, 1905 (2).

Eucopia unguiculata, Hansen, 1910.

Station. N., near the Chagos Archipelago, 0—600 fms., one, 20 mm.

I am not aware that this species has ever before been recorded from the Indian

Ocean though known from the East Indian Archipelago and off the coasts of California.

It is widely distributed in the Atlantic.

SECOND SERIES—ZOOLOGY, VOL. XV. 16

122 PERCY SLADEN TRUST EXPEDITION

4. Eucopia sculpticauda, Faxon.

. sculpticauda, Faxon, 1895.

. sculpticauda, Hansen, 1905 (1).

. intermedia, Hansen, 1905 (1).

. sculpticauda, Hansen, 1910.

See &

Station. aa, near Providence Island, 900 fms., one, 33 mm. |

Alcock has recorded EH. sculpticauda from the Indian Ocean. This is the only

previous record for these waters known to me.

Sub-order MYSIDA.

Family Myside.

Subfamily Siriellinz, Norman.

Genus SIRIELLA, Dana.

5. Siriella thompsoni (H. Milne-Edwards).

Cynthia thompsont, Milne-Ed., 1837.

Siriella thompsont, Hansen, 1910.

Station. n, north of the Saya de Malha banks, surface, three males, 6°5—8 mm.,

one female, 4°5 mm.

Hansen’s paper, quoted above, should be consulted for the full synonymy of this

form. To the list of synonyms I would add S. edwardsi, Paulson=S. similis,

Czerniavsky.

6. Siriella gracilis, Dana.

S. gracilis, Dana, 1852.

S. gracilis, Sars, 1885.

S. gracilis, Hansen, 1910.

Malha banks, surface, five males, 7 mm., and one female, 4mm.; dd, Alphonse Island,

surface, one male, 7 mm.

Stations. ©, Chagos Archipelago, surface, one female, 2 mm.; n, north of Saya de

7. Swriella equremis, Hansen, ?.

S. equiremis, Hansen, 1910.

Stations. Q, Chagos Archipelago, surface, four females, 4—7 mm.; oo, Amirante

Islands, surface, one female, 5 mm.

Hansen (loc. cit.) has described from the collections made by the Siboga expedition,

no fewer than thirteen new species of the genus Siriella and has revised the genus on

a sound basis. Unfortunately, however, species can only be satisfactorily determined

from male specimens. As the material of the present species is represented by female

specimens only, I am somewhat doubtful as to its correct determination, but from the

general structure it seems to agree with S. a@quiremis. Before receiving Hansen’s paper

TATTERSALL—MYSIDACEA AND EUPHAUSIACEA 123

I had named these specimens S. paulsoni, Kossmann, and I am still inclined to think that

when male specimens of the latter species are discovered, S. equiremis will be found to

be synonymous with S. paulsoni. None of the Sealark specimens are as large as the

single specimen, recorded as S. paulsoni, from Ceylon by me (1906), but, otherwise, show

the closest agreement with the latter. After several years’ preservation, no trace of the

distinctive colouration of S. @quiremis, mentioned by Hansen, can be discovered.

Genus HEMISIRIELLA, Hansen, 1910.

8. Hemisiriella gardineri, n. sp. (Plate 6, figs. 1—5).

Stations. w, Farquhar Islands, surface, two males, immature, 6 mm. ; 00, Amirante

Islands, surface, one male, immature, 6 mm.

Form moderately slender.

Carapace not very short, laterally leaving only part of the last thoracic segment

exposed, dorsally leaving the whole of the last and part of the penultimate segments

of the thorax exposed; moderately produced anteriorly with the tip rounded.

Eyes rather small, pigmented area occupying less than half the whole eye.

Antennular peduncle (fig. 1) with the third joint about equal to the first and one

and a half times as long as broad.

Antennal scale (fig. 1) about two and a half times as long as broad, reaching to

about the middle of the third joint of the antennular peduncle, terminal lobe broader than

long, about one-fifth of the entire length of the scale, terminal spine of the outer margin

strong.

Antennal peduncle (fig. 1) as long as the scale, with the second joint almost three

times as long as the third.

Third pair of thoracic limbs (fig. 3) without any transverse articulation on the sixth

jot; dactylus distinct and slightly curved; terminal brush of sete longer than the

dactylus.

Fourth pair of thoracic limbs (fig. 4) extremely elongate, reaching when extended to

the end of the antennular peduncle; sixth joint with a distinct articulation anterior to

the middle ; dactylus very rudimentary and hidden in the long terminal brush of setz.

Pleopods in the male with the pseudobranchial rami on the second to fourth pairs

spirally twisted and the endopods and exopods of the third and fourth pairs similar,

without modified sete.

Telson (fig. 5) a little longer than the last segment of the pleon and about three

times as long as broad at its base; constricted somewhat near the base after which the

margins converge gradually to a broadly rounded apex; at the constriction the lateral

margins are armed by two rather long spines, then follows a short unarmed part of the

lateral margins after which the latter bear about eighteen spines which are arranged

distally in groups of five, four, three and five spines; terminal spines at the apex, the

longest, about one-ninth of the total length of the telson; between the terminal spines

there are three subequal spinules and a pair of plumose sete.

16—2

124 PERCY SLADEN TRUST EXPEDITION

Inner uropod (fig. 5) slightly longer than the outer, its inner margin armed with

a row of spines, arranged more or less in groups and extending to the apex.

Outer uropod (fig. 5) with the terminal joint about one-fourth of the length of the

proximal joint and about one and a half times as long as broad; outer margin of the

proximal joint armed with seven spines which occupy considerably more than one-half

of the margin, the proximal four very distantly placed, the terminal three situated at

the junction with the terminal joint.

Length of male specimens, not quite mature, 6 mm.

Figs. 2, 3 and 4 on Plate 6 show the endopods of the second, third and fourth

thoracic limbs magnified to the same scale and sufficiently explain these appendages.

The genus Hemuisiriella was founded by Hansen for two species which differ from

Siriella in the following points :—

(1) In having the carapace unusually short so that it leaves fully exposed, both

laterally and dorsally, the last two segments of the thorax.

(2) Inthe comparative greater length of the third joint of the antennular peduncle.

(3) The small size of the antennal scale.

(4) In several small details in the structure of the mandibles.

(5) In having the third pair of thoracic limbs (first pair of thoracic legs according

to the terminology adopted by Hansen, the first and second pair of thoracic limbs being

ealled by that author maxillipede and gnathopod respectively) greatly elongated, with

the dactylus very rudimentary and hidden in a brush of peculiar setze.

It is with very great diffidence that I refer the present species to the same genus, for

it agrees with Hemisiriella in only two of the above five points, viz. in the small size of

the antennal scale and in the form of the mandibles.

As regards the last of the five points already mentioned, H. gardinert shows a

remarkable feature. It has one of the thoracic limbs considerably elongated and exhibit-

ing the same structure as in H. parva and H. pulchra but, instead of it being the third

thoracic limb as in the latter two species, it is the fourth thoracic limb of H. gardinert

which is thus elongated. I have been led to refer H. gardineri to the genus Hemisiriella

mainly on its possession of an elongate thoracic limb, agreeing in its essential structure

with those described for the genus though differing in position. It is quite probable that

future observers may regard the difference in position of the elongate limb as of generic

importance for it would appear to be an exactly parallel instance to that seen in the

genera Nematoscelis and Nematobrachion among the Euphausiacea. Attention may be

directed to Calman’s remarks on the latter genera (Calman, 1905).

For the rest, H. gardineri resembles a true Sirelia in the form of the carapace,

antennular peduncle and telson. The species is sutticiently distinguished by the com-—

bination of characters presented by the uropods, antennal scale and thoracic limbs.

TATTERSALL—MYSIDACEA AND EUPHAUSIACEA 125

Subfamily, Gastrosaccinz, Norman.

Genus Gastrosaccus, Norman.

9. Gastrosaccus indicus, Hansen.

G. indicus, Hansen, 1910.

Stations. u, Farquhar Island, surface, one male, 7 mm.; v, Farquhar Island, surface,

two females, 7 mm.; y, Providence Island, surface, one male, 7 mm.

Hitherto, only known from Hansen’s records from the Netherland East Indies, where

the types were captured by the Szboga expedition.

10. Gastrosaccus parvus, Hansen.

G. parvus, Hansen, 1910.

Stations. u, Farquhar Island, surface, one male, 6 mm.; x, Providence Island, surface,

one male, 7 mm.

This species, also described in the first place from the Szboga collections, has a

distribution coinciding with that of the last.

Subfamily Leptomysinz, Norman.

Genus EKucuatomera, G. O. Sars.

11. Euchetomera typica, G. O. Sars.

E. typica, G. O. Sars, 1885.

E. limbata, Mlig, 1906.

Stations. bb, near Providence Island, 0—140 fms., one female, 9 mm.; kk, Amirante

Islands, 100 fms., one female, 9 mm.

I have already expressed the opinion (Tattersall, 1909), that #. limbata, Illig, would

prove to be a synonym of F. typica, Sars, and, after an examination of actual specimens

and a comparison of them with the type species, I am fully confirmed in my opinion.

E. limbata is stated to differ from #. typica in the presence of a finger-like process on

the eyes and in having an armature of small teeth on the anterior margin of the carapace.

Both these supposed differences disappear on an examination of Sars’ types, for the latter

possess finger-like processes on the eyes and the armature of small teeth on the carapace.

I would further note that both Sars’ types and those in the present collection have the

lateral posterior margins of the first four segments of the pleon and the entire posterior

margin of the fifth and sixth segments of the pleon coarsely serrate.

The present specimens, though apparently sexually mature, are smaller than both Sars’

and Illig’s types.

E. typica has not before been recorded from the Indian Ocean.

12. EHuchetomera oculata, Hansen.

E. oculata, Hansen, 1910.

Stations. p, near Farquhar Island, 600 fms., one female, 8 mm.; kk, Amirante

Islands, 150 fms., one female, 8 mm.

126 PERCY SLADEN TRUST EXPEDITION

These specimens are in substantial agreement with Hansen’s recent description and

I am convinced that they belong to the same species. But I am by no means certain that

this form is distinct from FE. glyphiophthalma, Mlig. The only important difference in the

published descriptions, is that the antennal scale of the latter species is described as four

and a half times as long as broad while in Z. oculata the scale is three and a half times as

long as broad. _IIlig’s figure does not agree exactly with his description, but brings the

species much more into line with FE. oculata.

Subfamily Mysine.

Genus ANIsomysis, Hansen.

13. Anisomysis bifurcata, n. sp. (Plate 7, figs. 1—6).

Stations. A, north of the Chagos Islands, 150 fms., one female, 3 mm.; v, Farquhar

Island, surface, one male, 5°5 mm.; w, Farquhar Island, surface, one male, 5°5 mm.

Carapace covering all but the last thoracic segment ; produced in front into a broad

triangular plate with a pointed apex, which does not reach to the distal end of the first

joint of the antennular peduncle.

Pleon with the first five segments sub-equal, sixth segment nearly twice as long as

the fifth; at the ventral postero-lateral corners of each of the first five segments of the

pleon there is a small blunt spine, those on the first segment being larger than any of the

others.

Eyes rather large, pigment black.

Antennular peduncle (fig. 1) in the male with the terminal lobe large, longer than

broad with the distal extremity considerably narrower than the proximal and slightly

curved.

Antennal scale (fig. 2) barely over-reaching the antennular peduncle, about five times

as long as broad, the second joint about one and a half times as long as broad ; lanceolate

in shape and setose all round.

Mouth parts and thoracic limbs agreeing essentially with those given in Hansen's

definition of the genus, except that I was unable to make out any subjoints in the sixth

joint (tarsus) of the third thoracie limb (the only one remaining in any of the specimens,

after the first and second pair).

First, second, third and fifth pleopods in the male, rudimentary plates as in the

female ; fourth pair (fig. 5) reaching beyond the sixth segment of the pleon, to the level

of the otocyst of the inner uropods, distal peduncular joint three times as long as broad,

exopod with the first joint rather more than four times as long as the second, third joint

twice as long as the latter, somewhat swollen at the extremity and bearing two terminal

branches, the inner with a thickened basal part and a tapering terminal part adorned with

setee along both margins, outer branch unjointed, in the form of a long slender spine.

Telson (fig. 6) as long as the last segment of the pleon and two and a half times as

long as broad at its base; very deeply cleft for more than one-third of its length, cleft —

TATTERSALL—MYSIDACEA AND EUPHAUSIACEA 127

very wide and unarmed, so that the distal part of the telson has the form of a two-pronged

fork ; lateral margins armed along the distal two-thirds of the margin with six spines,

three of which are on the forks of the prong, the distal one at the tip.

Uropods long and slender, about one and a third times as long as the telson, the inner

one very slightly longer than the outer, without spines on its inner ventral margin.

Length of an adult male, 5°5 mm.

I have been somewhat puzzled as to what genus this species should be referred to and

after much hesitation I have placed it in the genus Anisomysis, Hansen, as being the one

with which it agrees most closely in its main features. It differs in having the tarsus of

the thoracic limbs apparently undivided and in the striking form of the telson. In having

the outer terminal branch of the fourth pleopods in the male unjointed it also presents a

small point of difference. But otherwise it agrees so closely with Hansen’s type species,

the only one known%, A. laticauda, that I have preferred to refer it to the same genus

rather than erect a new one for its reception. The form of the telson will at once serve

to distinguish it from all known Mysidee.

SPECIES OF UNCERTAIN GENERIC POSITION.

14. “ Mysis” quadrispinosa, Llig (Plate 6, figs. 6, 7).

M. quadrispinosa, Illig, 1906.

Stations. I, north of the Chagos Islands, 500 fms., one female, 5 mm.; M, Chagos

Islands, 75 fms., one female, 3 mm.

This species was described by Illig from a female captured at the Chagos Islands by

the Valdivia expedition, and Illig rightly left its generic position unsettled till male

_ specimens should be taken. The present specimens were captured in the same locality as

Illig’s type and appear to be the same species, but since both specimens are females and

still immature, it has not been found possible to throw any light on its generic affinities.

I am able, however, to add one or two particulars to Illig’s brief description which will

serve for the better elucidation of its characters.

The pleon is distinctly hispid all over and has the first five segments subequal in

length, the sixth being almost twice as long as the fifth.

There does not seem to be any hispidity on the thorax. The carapace is produced

into a short acutely pointed rostral projection which reaches about half way along the first

joint of the antennular peduncle.

The antennal scale is slightly longer than the antennular peduncle and twice as long

as its own. It is about six times as long as broad, narrowly lanceolate in shape, setose all

round and having a small terminal joint. The outer distal corner of the joint from which

the scale springs is produced into a short stout spine-like projection.

The telson (fig. 7) is only slightly shorter than the last segment of the pleon and

twice as long as broad at its base. It is deeply cleft for two-fifths of its length, the cleft

* While this paper was in the press, two further species of Anisomysis have been described from Japan by

Nakazawa (Ann. Zool. Japon., vol. vii. pt. 1v. 1910). In both species the telson is described as entire and, as

such, cannot be confused with the present species.

128 PERCY SLADEN TRUST EXPEDITION

armed with a pair of plumose setz at the apex and seven to ten small spines on each

lateral margin. The tip of each lobe of the cleft bears three short stout spines and the

lateral margins of the telson are armed along their distal half with seven small spines.

The dorsal surface of the telson is somewhat deeply channelled in the median line.

The inner uropod is about once and two-thirds as long as the telson and is armed

along its inner margin with ten long, rather stout spines, somewhat distantly set and not

reaching to the apex. ‘The outer uropods are a little longer than the inner.

Length of an immature female, 5 mm.

Illig makes no mention of the hispidity of the pleon or of the spines arming the inner

uropod, and the shape of the telson as he depicts it is somewhat different from that shown

in fig. 7, but I have little doubt that the two forms belong to the same species.

Order EUPHAUSIACEA.

Family Euphausiide.

Genus THysanopopa, H. Milne-Edw.

15. Thysanopoda tricuspidata, H. Milne-Edw.

Stations. D, surface, two, 5 and 5°5 mm.; P, 20 fms., twelve, 7—11 mm.; Q, surface,

twenty ; a, 150 fms., one, 5 mm.; e, 300 fms., one, 10 mm.; n, surface, ten; q, 1000—0 fms.,

two, 10 and 12 mm.; s, 250—0O fms., five, 5—15 mm.; dd, surface, thirteen; ll, 750 fms.,

one, 17 mm.

16. Thysanopoda equalis, Hansen.

T. equalis, Hansen, 1905.

T. equalis, Tattersall, 1909.

T. equalis, Hansen, 1910.

Stations. C, 1200—O0 fms., eight, 8—16 mm.; L, 75 fms., one, 15 mm.; N, 600—0 fms.,

two, 12 mm.; O, 180—0 fms., one, 8 mm.; Q, surface, one, 13 mm.; ¢, 300 fms., one, 9 mm.;

p, 600 fms., one ; q, 1000—O0 fms., four, 12—17 mm.; r, 500—250 fms., one, 16 mm.; s,

250—0 fms., two, 14 and 16 mm.; s, 750—500 fms., two, 12 and 16 mm.; aa, 900—O fms.,

two, 12 and 13 mm.; Il, 750 fms., four, 13—16 mm.

I have nothing to add to Hansen’s description of this species, with which these

specimens are in perfect agreement. It is very closely allied to 7. obtusifrons, G. O. Sars,

from which it is distinguished by the shape of the antennular lobe and the structure of the

copulatory organs of the first pleopods in the male. I would point out that both species —

have the telson armed dorsally with two rows of many spines, which, when broken off, —

have the appearance of two serrated keels. Sars has described this character for

T. obtusifrons, and it serves as a ready means of distinguishing these two forms from

their allies.

17. Thysanopoda monacantha, Ortmann (Plate 7, fig. 8).

T. monacantha, Ortmann, 1893.

T. agassiziw, Ortmann, 1894.

TATTERSALL—MYSIDACEA AND EUPHAUSIACEA 129

T. agassiz, Hansen, 1910.

T. monacantha, Hansen, 1911.

Stations. C, 1200—0 fms., two, 20 mm.; gq, 1000—0 fms., three, 12—19 mm.;

s, 750—500 fms., one, 23 mm.; ll, 750 fms., eighteen, 13—-28 mm.; mm, 400 fms., fifteen,

17—24 mm.; nn, 200 fms., three, 24 mm.

I had already named these specimens as 7. monacantha, Ortmann, when I received

Hansen’s report on the Siboga collections. In this report Hansen had regarded 7. mona-

cantha and T. agassizivi as distinct though very closely allied forms, but in his most recent

paper (1911) he has arrived at the conclusion that their separate specific identity cannot

be maintained. With this conclusion, I am in entire agreement. I give (fig. 8) a figure

of the copulatory apparatus on the first pleopod of the largest male in the collection.

Dr Hansen has seen this figure and is inclined to think that the specimen from which

it was taken is immature.

18. Thysanopoda microphthalma, G. O. Sars.

T. microphthalma, Sars, 1885.

T. distinguenda, Hansen, 1905.

T. distinguenda, Holt and Tattersall, 1906.

T. microphthalma, Hansen, 1910.

Stations. s, 500—750 fms., one female, 18 mm.; ll, 750 fms., one female, 31 mm.;

mm, 400 fms., four females, 20-27 mm. and one male (immature), 20 mm.

The only male specimen is immature so that the structure of the copulatory organs

cannot be ascertained. This renders the identification of the species very uncertain.

I have very carefully compared these specimens with Atlantic representatives of

T. microphthalma and I am unable to find any appreciable differences between them.

But I cannot overlook the possibility that the Sealark forms may be 7. orientalis,

Hansen, a species very closely allied to 7. microphthalma and only distinguishable by

the structure of the first pair of pleopods in the male.

19. Thysanopoda pectinata, Ortmann (Plate 7, fig. 7).

T. pectinata, Ortmann, 1893.

T. pectinata, Hansen, 1905 (2).

T. ctenophora, Ilig, 1908 (1) (fide Mllig, 1908 (2)).

Parathysanopoda foliifera, lig, 1909.

T. pectinata, Hansen, 1911.

Stations. N, 600—0 fms., one female, 18 mm.; ll, 750 fms., one male, 33 mm.

I had already named these specimens as 7. pectinata, Ortmann, when Hansen’s

report on the Siboga collections came to hand. On consulting him with reference to

these specimens, he told me that he believed they represented a new form, distinguished

from 7. pectinata by the somewhat longer and more acute rostrum. In his recent paper

(1911), however, he has expressed the opinion that the Pacific and Atlantic forms are

specifically inseparable. This confirms my earlier conclusions as to the name to be

attached to the Sealark specimens.

SECOND SERIES—ZOOLOGY, VOL. XV. 17

130 PERCY SLADEN TRUST EXPEDITION

I append a brief description of my specimens and give a figure of the copulatory

apparatus on the first pleopods of the male.

Carapace without lateral denticles and gastro-hepatic groove; produced in front as

a triangular plate with the terminal angle slightly less than 90°, the apex pointed and

very slightly upturned, reaching about half-way up the basal joint of the antennular

peduncle and not as far forward as the eyes; the anterior third of the carapace is adorned

in the mid-dorsal line by a low keel which does not reach the apex of the rostral plate

and in front of which is a median depression which latter is produced laterally for a little

way on each side of the keel.

Antennular peduncle with a rather long slender spine on the outer corner of the

basal joint; the lobe from the inner corner of the basal joint is in the shape of a quad-

rangle with the outer distal corner produced slightly outward and forward, the anterior

margin being straight or lightly concave, and deeply serrate or pectinate, with about

twelve or thirteen spiniform teeth; the lobe proceeds from the usual raised hispid cushion,

extends for rather more than half-way up the second joint of the antennular peduncle and

is less than half the width of the basal joint at its base but considerably more than half

the width of the second joint at its distal margin; the lobe from the inner corner of the

second joint of the antennular peduncle is rather large, sub-quadrangular in shape,

without spine or process.

The antennal scale reaches about half-way up the third joint of the antennular

peduncle; the basal ventral spine is about one-third of the length of the scale, long,

slender and smooth.

The telson has two pairs of dorsal denticles and the inner uropod reaches to the apex

of the telson, the outer uropod being somewhat longer.

The figure (fig. 7) will best explain the structure of the copulatory apparatus on the

first pleopod of the male. The nomenclature of the parts is that suggested by Hansen.

A spine-shaped process, p’, is present. The terminal process, p’, is somewhat stout,

reaching to the base of p*, and widening distally into more or less spatulate form. The

proximal process, p’, is about as long as p’, sickle shaped, sharply pointed at the tip and

having a stout tooth or heel on the inner side of the first curve.

Genus EupHaustA, Dana.

20. Euphausia mutica, Hansen.

E. pellucida (pars), G. O. Sars, 1885.

EH. mutica, Hansen, 1905.

E. mutica, Tattersall, 1906.

E. mutica, Hansen, 1910.

Stations. C, 1200—0 fms., two; D, surface, four; F, surface, three; H, surface,

two; L, 75 fms., two; N, 600—0 fms., sixteen; VU, 180—0 fms., one; P, 20 fms., twenty-

one ; Q, surface, thirteen; c, 225 fms., four, 250 fms., seven, 275 fms., sixteen, 300 fms.,

fifteen ; d, surface, two; e, 300 fms., four; k, 100 fms., one; n, surface, one; 0, surface,

one; q, 1000—0 fms., seven; r, 500—250 fms., one; s, 250—O fms., six, 750—0 fms., one;

TATTERSALL—MYSIDACEA AND EUPHAUSIACEA 131

u, surface, three; v, surface, two; w, surface, two; y, surface, four; aa, 900—O fms.,

twelve; bb, 140—0fms., four; ee, surface, ten; gg, surface, eight; hh, surface, seven ;

kk, 250 fms., twenty-four, 300 fms., thirteen; ll, 750 fms., eighteen; mm, 400 fms.,

sixteen; nn, 200 fms., twenty-nine.

21. Euphausia similis, G. O. Sars.

E. similis, G. O. Sars, 1883.

E. similis, G. O. Sars, 1885.

E. similis, Hansen, 1910.

Stations. C, 1200—0fms., seven; F, 50 fms., one, 100 fms., one, 150 fms., one;

N, 600—0 fms., twelve; p, 500 fms., three; q, 1000—0 fms., seven; s, 250—0O fms., five,

750—500 fms., three; aa, 900—0fms., ten; kk, 250 fms., three; ll, 750 fms., nineteen ;

mm, 400 fms., four; nn, 200 fms., fifteen.

These specimens belong to the var. crassirostris described by Hansen (1910).

22. Huphausia hemigibba, Hansen.

E. hemigibba, Hansen, 1910.

Stations. C, 1200—Ofms., ten; N, 600—0fms., one male, two females; c, 225—

300 fms., three males, four females; s, 750—500 fms., one male; y, surface, two males ;

ll, 750 fms., two; mm, 400 fms., one male, one female.

Hansen (1910) has lately divided the species EH. gibba into four species, mainly on

the structure of the copulatory organs on the first pleopods in the male. Females are

extremely difficult or almost impossible to name accurately but from an examination of

every male of the gibba group in this collection it appears that only two species of the

group, this and the following one, are represented.

I should mention that the specimens recorded by me from the Mediterranean (1909)

as E. gibba are in the light of Hansen’s work really referable to this form.

23. Euphausia paragibba, Hansen.

E. paragibba, Hansen, 1910.

Stations. C, 1200—0fms., eighteen; L, 125fms., one male; N, 600—0 fms., five

males, five females ; Q, surface, two males ; p, 600 fms., three; q, 1000—0 fms., two males,

one female; r, 500—250fms., one male, two females; s, 250—0fms., one female, 750—

500fms., two males; v, surface, one male; y, surface, seven males; kk, 300 fms., two

males, one female; ll, 750 fms., thirty-two; mm, 400 fms., five males, three females ;

nn, 200 fms., seven males, two females.

This species, a Pacific form according to Hansen, is evidently much more abundant

in the Indian Ocean than the last species, an Atlantic form.

24, Huphausia tenera, Hansen.

E. gracilis, G. O. Sars, 1883.

E. gracilis, G. O. Sars, 1885.

E. tenera, Hansen, 1905.

17—2

132 PERCY SLADEN TRUST EXPEDITION

E. tenera, Hansen, 1910.

nec /. gracilis, Dana, 1852.

Stations. C, 1200—0 fms., five; D, 120 fms., one; F, 100 fms., two, 150 fms., three;

L, 75fms., one, 125 fms., one; N, 600—0 fms., four; O, 180—0 fms., two; P, 20 fms.,

two; Q, surface, seventeen; c, 275—300fms., five; n, surface, one; p, 500 fms., one;

q, 1000—0 fms., one; s, 250—0 fms., forty-eight, 500—750 fms., one; v, surface, one;

y, surface, one; aa, 900—0fms., three; kk, 250—300 fms., three; mm, 400 fms., two;

nn, 200 fms., four.

Genus PsrupEUPHAUSIA, Hansen.

Euphausia (pars), Sars, 1885.

Euphausia, Stebbing, 1905.

Euphausia (pars), Tattersall, 1906.

Pseudeuphausia, Hansen, 1910.

25. Pseudeuphausia latifrons (G. O. Sars).

Euphausia latifrons, G. O. Sars, 1883.

Euphausia latifrons, Sars, 1885.

Euphausia latifrons, Stebbing, 1905.

Euphausia latifrons, Tattersall, 1906.

Euphausia latifrons, Hansen, 1908.

Pseudeuphausia latifrons, Hansen, 1910.

Station. k, 100 fms., one, 5 mm., 300 fms., one, 7 mm.

In 1905 Stebbing pointed out that specimens of this species from near the Cape of

Good Hope possessed a lateral denticle on the carapace. In the next year I was able to

confirm this observation for specimens from Ceylon and I also pointed out that the leaflet

on the antennular peduncle did not agree exactly with Sars’ figures. I gave a figure of

the antennular leaflet and mentioned the fact that my observations had been confirmed

by examination of the type specimens, kindly done for me by Dr W. T. Calman. Hansen ~

(1908) confirmed my description of the antennular leaflet and in 1910 gave a full deserip-

tion of the species, with figures, in the course of which he refers it to a new genus,

Pseudeuphausia, differing from Huphausia mainly in the aberrant condition of the

copulatory organs on the first pleopod of the male.

Genus NEMATOSCELIS, G. O. Sars.

26. Nematoscelis microps, G. O. Sars.

N. microps, G. O. Sars, 1883.

N. microps, G. O. Sars, 1885.

N. rostrata, G. O. Sars, 1885.

N. microps, Hansen, 1905.

N. microps, Tattersall, 1906.

N. microps, Hansen, 1910.

TATTERSALL—MYSIDACEA AND EUPHAUSIACEA 133

Stations. A, 50 fms., ten, 75fms., two, 125 fms., one; B, 50fms., four; C, 1200

—0 fms., five; F, 150fms., one; L, 50 fms., one; N, 600—0 fms., seventeen; P, 20 fms.,

one; e, 300 fms., one, 400 fms., one; p, 200 fms., one, 400 fms., one, 500 fms., five, 600 fms.,

six, 800 fms., two; q, 1000—0fms., seventeen ; r, 500—250 fms., three ; s, 250—O fms.,

nine, 750—500 fms., six; u, surface, three; v, surface, three; w, surface, one; aa,

900—0 fms., three ; bb, 140—0 fms., two; kk, 250 fms., two, 300 fms., four; ll, 750 fms.,

twelve; mm, 400 fms., nine; nn, 200 fms., ten.

27. Nematoscelis gracilis, Hansen.

N. gracilis, Hansen, 1910.

Stations. F, 50fms., two; N, 600—O0 fms., two; q, 1000—O0 fms., five; s, 250—0 fims.,

one, 750—500 fms., one ; aa, 900—0 fms., three; ll, 750 fms., three; mm, 400 fms., three.

28. Nematoscelis tenella, G. O. Sars.

N. tenella, G. O. Sars, 1883.

N. tenella, G. O. Sars, 1885.

N. tenella, Hansen, 1905.

N. tenella, Hansen, 1910.

Stations. L, 50fms., one; N, 600—0 fms., three; O, 180—0 fms., one; a, 50 fms.,

six, 100 fms., one; p, 500fms., one, 800 fms., three; q, 1000—Ofms., three; r, 500—

250fms., one; s, 250—0fms., two, 750—500fms., one; aa, 900—O fms., four; kk,

300 fms., two; ll, 750 fms., two; mm, 400 fms., one; nn, 200 fms., eight.

Genus NEMATOBRACHION, Calman.

29. Nematobrachion bodpis (Calman).

Nematodactylus bodpis, Calman, 1896.

Nematobrachion bodpis, Calman, 1905.

N. boépis, Holt and Tattersall, 1905 and 1906.

N. bodpis, Hansen, 1905.

Stations. N, 600—0fms., one, 18 mm.; k, 300fms., one, 9mm.; kk, surface, one,

10 mm.

30. Nematobrachion flexipes (Ortmann).

Stylocheiron flexipes, Ortmann, 1893.

Nematodactylus flexipes, Calman, 1896.

Nematobrachion flexipes, Hansen, 1905.

Stations. e, 400 fms., one, 11 mm.; k, 250 fms., one, 9 mm.

Calman (1896) was the first to suggest that the Stylocheiron flewipes of Ortmann

should be referred to his genus Nematodactylus (since changed to Nematobrachion).

Hansen, in 1905, confirmed Calman’s suggestion after examining specimens in the

Copenhagen Museum.

I am not aware of any records of this form subsequent to Ortmann’s original ones

from the northern part of the South Atlantic. The present records, therefore, indicate

a wide increase in its horizontal distribution and are the first from the Pacific Ocean.

134 PERCY SLADEN TRUST EXPEDITION

Genus SrytocHErron, G. O. Sars.

31. Stylocheiron carinatum, G. O. Sars.

S. carinatum, G. O. Sars, 1883.

S. carinatum, G. O. Sars, 1885.

S. carinatum, Hansen, 1910.

Stations. A, 75fms., eight, 125fms., two; B, 100 fms., one; C, 1200—O fms.,

eighteen ; D, surface, one; F, 150 fms., three; H, surface, three; L, 50 fms., one, 75 fms.,

two; M, 25 fms., thirteen, 75 fms., four; P, 20 fms., seven; Q, surface, three ; a, 25 fms.,

twenty-one, 50 fms., two, 75 fms., two, 100 fms., one, 150 fms., two; ec, 250fms., four,

275 fms., five, 300fms., four; d, surface, one; e, 50fms., one; s, 250—0fms., six;

w, surface, two; bb, 140—0 fms., four; ge, surface, one; kk, surface, one; ll, 750 fms.,

one; mm, 400 fms., one; nn, 200 fms., one.

32. Stylocheiron suhm, G. O. Sars.

S. suhmi, G. O. Sars, 1883.

S. suhmi, G. O. Sars, 1885.

S. suhmi, Hansen, 1910.

Stations. A, six; B, four; C, 1200—0fms., three; F, 50fms., one, 150 fms., one;

L, 75 fms., three; M, 25 and 75 fms., one; N, 600—0 fms., one; a, eight; c, 275—300 tms.,

four; e, 50fms., three; k, 200 fms., one; p, 200—500 fms., three; s, 250—Ofms., six ;

u, surface, one; bb, 140—0 fms., four, hand-net, surface, one.

33. Stylocheiron longicorne, G. O. Sars.

S. longicorne, Sars, 1883.

S. longicorne, Sars, 1885.

S. longicorne, Hansen, 1910.

Stations. A, two; B, two; C, 1200—Ofms., one; F, 150 fms., one; I, 500 fms.,

one; M, 25 and 75fms., two; a, one; c, 275—300fms., three; e, 200 fms., one; k,

250 fms., one, 300 fms., five; p, 500fms., two; bb, 140—0 fms., two; kk, surface, one ;

ll, 750 fms., two; mm, 400 fms., one.

34. Stylocheiron microphthalma, Hansen.

S. microphthalma, Hansen, 1910.

Stations. A, seven; B, one; F, 50 fms., two; M, 25 and 75 fms., eight; a, one;

c, 275—300 fms., one; s, 250—0Ofms., four; gg, surface, one.

35. Stylocheiron abbreviatum, G. O. Sars.

S. abbreviatum, G. O. Sars, 1883.

S. abbreviatum, G. O. Sars, 1885.

S. chelifer, Chun, 1896.

S. abbreviatum, Hansen, 1910.

Station. kk, 100 fms., one, 9 mm.

TATTERSALL—MYSIDACEA AND EUPHAUSIACEA 135

36. Stylocheiron elongatum, G. O. Sars.

S. elongatum, G. O. Sars, 1883.

S. elongatum, G. O. Sars, 1885.

S. elongatum, Hansen, 1905.

S. elongatum, Holt and Tattersall, 1906.

Stations. C, 1z00—0 fms., one, 10 mm.; c, 300 fms., two, 8°5 and 9 mm.; k, 300 fms.,

one, 10 mm. ; s, 250—0 fms., one, 10 mm.

LIST OF REFERENCES.

Atcock and ANDERSON, 1899. Ann. Mag. Nat. Hist., Ser. 7, vol. iii.

Catman, W. T., 1896. “Deep-sea Crustacea from the South West of Ireland.” Trans. Royal Irish

Acad., vol. xxxi. Pt. 1.

— 1905. “Note on a genus of Euphausid Crustacea.” Ann, Report Fish. Ireland, 1902—3,

Pt 1. App. Iv.

Cuun, C., 1896. “Ueber pelagische Tiefsee-Schizopoden.” Bibliotheca Zoologica, Heft xix.

Dana, J., 1852. Crustacea in U.S.A. Exploring Expedition, vol. xiv.

Faxon, 1895. “Stalk-eyed Crustacea of Albatross Expedition.” Mem. Mus. Comp. Zool., Harvard, xviii.

Hansen, H. J. 1905 (1). “Preliminary Report on the Schizopoda of the Princess Alice for 1904.”

Bull. Mus. Océan. Monaco, No. 30.

— 1905 (2). “Further notes on the Schizopoda.” Bull. Mus. Océan. Monaco, No, 42.

— 1908. The Danish Jngolf Expedition, vol. iii. 2. Crust. Malacostraca I.

— 1910. “The Schizopoda of the Siboga Expedition.” Siboga Reports, xxxvil.

— 1911. “The genera and species of the Order Euphausiacea with account of remarkable variation.”

Bull. Instit. Océan. Monaco, No. 210.

Hour and TatTTerRsALL, 1905. “Schizopoda from the North-East Atlantic Slope.” Ann. Report

Fisheries Ireland, 1902—3, Pt. 1. App. Iv.

— 1906. “Schizopoda from the North-East Atlantic Slope, Supplement.” Fisheries, Ireland, Sci.

Invest., 1904, v.

Tic, G., 1906. “Bericht iiber die neuen Schizopodengattungen und -arten der Deutschen Tiefsee

Expedition.” Zool. Anz., Bd. xxx. No. 7.

— 1908 (1). “Gattung Thysanopoda (Fortsetzung).” Zool. Anz., Bd. xxxiii. No. 4.

—— 1908 (2). “Berichtigung zu den Mitteilungen iiber die Thysanopoda-Arten der Deutschen Tiefsee-

Expedition, 1898—99.” Zool. Anz., Bd. xxxiii. No. 13.

— 1909. “Hin Weiterer Bericht itiber die Schizopoden der Deutschen Tiefsee-Expedition, 1898—99.”

Zool. Anz., Bd. xxxv. No. 8.

Mitnr-Epwarps, H., 1837. Histoire Naturelle des Crustacés.

Ortmann, A. E., 1893. Decapoden und Schizopoden der Plankton Expedition.

— 1894. Bull. Mus. Comp. Zool., Harvard, vol. xxv. no. 8.

— 1906. “Schizopod Crustaceans in the U.S.A. National Museum.—The families Lophogastride

and Eucopiide.” Proc. U.S.A. Nat. Mus., vol. xxxi.

Sars, G. O., 1883. “ Preliminary notices of Schizopoda of Challenger.” Forh. Vid. Selsk. Christiania

for 1883, no. 7.

— 1885. Report on Schizopoda of Challenger, Zool., vol. xiii.

STEpBING, T. R. R., 1902. “South African Crustacea.” Pt. 1. Marine Investigations South Africa,

vol. ii.

ay) 1

136 PERCY SLADEN TRUST EXPEDITION

STeppine, T. R. R., 1905. “South African Crustacea.” Pt. ur. Marine Investigations South Africa

vol. 111.

TaTTERSALL, W. M., 1906. “On the Leptostraa, Schizopoda and Stomatopoda,” in Herdman, Report

Pearl Oyster Fisheries, Supplem. Report xxxiii.

— 1909. “The Schizopoda collected by the Maia and Puritan in the Mediterranean.” Mitth. Zool.

Stat. Neapel, Bd. 19, Heft 2.

WILLEMOES-SuuHM, 1875. “Some Atlantic Crustacea from the Challenger Expedition.” Trans. Linn.

Soe., London, Ser. 2, Zoology, vol. i.

Woop-Mason, J., 1891. Ann. Mag. Nat. Hist., Ser. 6, vol. viii.

and Atcock, 1891. Ann. Mag. Nat. Hist., Ser. 6, vol. viii.

EXPLANATION OF PLATES 6 AND 7.

PLATE 6.

Fig. 1. Hemisiriella gardineri, Tattersall, male, antennular peduncle, antennal scale and peduncle.

x 68.

Fig. 2. Same, endopod of the second thoracic limb. x 68.

Fig. 3. Same, endopod of the third thoracic limb. x 68.

Fig. 4. Same, endopod of the fourth thoracic limb. x 68.

Fig. 5. Same, telson and uropods. x 68.

Fig. 6. “Mysis” quadrispinosa, Illig, female, dorsal view of anterior end. x 68.

Fig. 7. Same, telson. x 21.

PLATE 7.

Fig. 1. Anisomysis bifurcata, Tattersall, male, dorsal view of anterior end. x 68.

Fig. 2. Same, antennal scale and peduncle. x 68.

Fig. 3. Same, endopod of the second thoracic limb. x 68.

Fig. 4. Same, endopod of the third thoracic limb. x 68.

Fig. 5. Same, fourth pleopod. x 68.

Fig. 6. Same, telson. x 68.

Fig. 7. Thysanopoda pectinata, Ortmann, copulatory organs on first pleopod of male. x 21.

Fig. 8. Thysanopoda monacantha, Ortmann, copulatory organs on first pleopod of male. x 68.

Percy SLADEN TRUST EXPEDITION. TRANS LINN. Soc. SER. 2.Z00L.VOL.XV. PL.6.

(TATTERSALL)

EB Wilson, Cambridge

Perey SLADEN TRUST EXPEDITION. TRANS. LINN. Soc. SER.2.Z00L VOL XV. PL 7.

(TarTBRSALL)

<eccce

”

CRUSTAOBA FROM THE INDIAN OCEAN.

E Wilson, Cambridge.

No. X.—THE MARINE POLYZOA OF THE INDIAN OCEAN,

FROM H.M.S. SHALARK.

By Laura Roscor THORNELY.

Plate 8,

Read 2nd March, 1911.

THERE are 106 species and 12 varieties in this collection, of which nine species and

five varieties are new to science, namely :—

Bugula neritina var. rubra. Lepralia crassa.

a 5S » tenuata. 3 marginata.

$5 Ae » ramosa. 5 bicornis.

Membraniporella magnifica. Smittia glomerata

Cribrilina reticulata. 3 ornata

Bifaxaria vagans. Phylatella galeata

Retepora monilifera var. Mucronella ellerit var. multi-aviculariata.

Forty of these species have been reported by myself from Ceylon*, and some of the

same with three besides from the Bay of Bengal+. Mr Waters has reported 25 species

and one variety from the Red Seat, which are in the Sealark collection, 20 of these

being also in the Ceylon and Indian collections. This leaves 58 species and 11 varieties

in the present list that are new. records for these Eastern seas, namely :—

Mitea recta Hincks. Bugula dentata Lamx.

Synnotum aviculare (Pieper). » gracilis Busk.

Catenaria lafontii (Aud.). » neritina (Linn.).

a otophora Kirk. 3 - 5 var. minima Waters.

Vitaticella crystallina (Wyv. Th.). * - - » rubra nov.

a buskit (Wyv. Th.).

Scrupocellaria scrupea Busk var. dongolensis Waters.

ra 33 ” » tenuata nov.

” ” ” ” ramosa@ nov.

5s pilosa Busk. Beania intermedia (Hincks).

" obtecta Haswell. Membranipora normaniana (D’Orb.).

» JSrondis Kirk. 9 radicifera Hincks, var. intermedia Kirkp.

sf macandrei Busk. 73 pedunculata Manzoni.

Caberea boryi (Aud.). x variegata Hincks.

Canda retiformis Pourtalés. zi savartii (Aud.).

Pollapleciwm gilbertensis Maplestone. 5 granulifera Hincks.

* Herdman’s Ceylon Pearl Fisheries Report—Supplementary Rep. xxvi, 1905.

+ Report on the Marine Polyzoa in the Collection of the Indian Museum, Records of the Indian Museum,

vol. i, pt. 3, No. 13, 1907.

¢ Journ. Linnean Society, London, Zool., vol. xxx, Oct. 1907; vol. xxxi, March 1909.

SECOND SERIES—ZOOLOGY, VOL. XV. 18

138

Onychocella velata (Hincks).

Micropora coriacea (Esper.).

A brevissima Waters.

5 bouchardit (Aud.).

Membraniporella magnifica, n. sp.

Cribrilina radiata (Moll.).

- » var. flabellifera Kirk.

5 Jigularis (Johnston).

‘3 reticulata, n. sp.

Steganoporella magnilabris (Busk).

Thalamoporella rozerit Aud.

Bifaxaria vagans, n. sp.

Salicornaria tenuirostris Busk.

Tubucellaria cereoides (Ellis and Sol.).

a " var, chuakensis Waters.

5 zanzibarensis Waters.

Microporella ciliata (Pallas)

0 hyadesi (Jullien).

96 diadema MacG.

0 renipuncta MacG.

malusit (Aud.).

magnirostris (MacG.).

Lagenipora tuberculata MacG.

5 spinulosa Hincks.

Retepora monilifera MacG.

porcellana MacG.

" denticulata Busk.

Schizoporella cecilii (Aud.).

triangula Hincks.

3 spongites (Smitt).

”

viridis Thornely.

nivea Busk.

= biaperta Michelin.

A circinnata (MacG.)

armata Hincks.

lata MacG.

subsinuata Hincks.

A hyndmani (Johnston).

Gemellipora glabra, form striatula Smitt.

; lata Smitt.

Rhyncozoon bispinosa (Johnston).

ss incisor Thornely.

Lepralia turrita Smitt.

3 poissonit Aud.

dutertrei (Aud.) var. pes-anseris (Smitt).

PERCY SLADEN TRUST EXPEDITION

Lepralia cleidostoma Smitt.

” Jeegeensis Busk.

3 crassa, D. Sp.

; marginata, Nn. sp.

i depressa Busk.

3 bicornis, n. sp.

Porella concimna var. gracilis Hincks.

i" nitidissima Hincks.

Smittia signata Waters.

Fe landsborovw Johnston.

os marmorea Hincks.

a tubula Kirk.

. afinis Hincks.

5 glomerata, n. sp.

trispinosa Johnston.

a nitida Verrill.

3 ornata, 1. sp.

5 murarmata Kirk.

Phylactella columnaris Kirk.

3 galeata, n. sp.

Mucronella coccinea, Abild.

+5 porelliformis Kirk.

PA delicatula Busk.

is ellertt MacG. var. multi-aviculariata nov.

Adeonella subsulcata (Smitt).

Cellepora megasoma MacG. :

- longirostris MacG.

is costata MacG.

3 vagans Busk.

Holoporella tridenticulata (Busk).

albirostris (Smitt).

5; mamillata (Busk).

5 foliata MacG.

y simplex (MacG.).

- discoidea (Busk).

Crisia conferta Busk.

Idmonea atlantica Forbes.

3 milneana D’Orb.

~ serpens (Linn.).

- radians (Lamk.).

Hornera robusta MacG.

Entalophora proboscidea (M. Edwards).

Lichenopora holdsworthii (Busk).

Cylindrecium giganteum (Busk).

Farella atlantica Busk.

THORNELY—MARINE POLYZOA OF THE INDIAN OCEAN 139

SYSTEMATIC LIST.

CHEILOSTOMATA.

1. Attea recta, Hincks, Ann. Mag. Nat. Hist., ser. 3, ix, 1862, p. 25.

Cargados, 28 fath.; Amirante, 35 fath.

2. Synnotum aviculare (Pieper).

Gemellaria avicularis Pieper, Jahresbericht Westfalischen Provincialvereins, ix ;

Hincks, Ann. Mag. Nat. Hist., ser. 5, xvii, p. 257.

Amirante, 29 fath.

3. Catenaria lafonti (Aud. and Sav.), Descrip. de l Egypte, Hist. Nat., 1, p. 242.

Cargados.

4. Catenaria otophora, Kirkpatrick, Ann. Mag. Nat. Hist., ser. 6, v, 1890, p. 17.

Salomon.

5. Vataticella crystallina (Wyville Thomson).

Catenicella crystallina, Wyv. Th., Dub. Nat. Hist. Rev., April 1858, p. 7; MacG.,

Prod. Zool. Vict. Dec. iii, p. 25.

One small broken piece only.

Amirante, 23 fath.

6. Vitatecella buski (Wyville Thomson).

Catenicella busku, Wyv. Th., Dub. Nat. Hist. Rev., p. 140, April 1858; MacG.,

Prod. Zool. Vict. Dee. ii, p. 24.

There is only one fragment of this delicate species. The vittz reach the full length

of the zcecium, the two lateral processes, bearing avicularia, are small and of even height,

the surface is finely punctured in front and the orifice has a slightly projecting rounded

lower lip. Ocecia are absent.

Amirante, 23 fath.

7. Scrupocellaria scrupea, Busk, var. dongolensis, Waters, Journ. Linn. Soc.

London, Zool., xxxi, 1909, p. 134.

Amirante, 34 fath.

8. Scrupocellaria pilosa, Busk, Report Challenger Exp., x, pt. xxx, p. 24.

The scutum of these specimens is not so fully developed as in Busk’s figure, Pl. XI,

fig. 7, but is of the same form with the lamina more developed above than below the

peduncle. One of the five or six spines, usually the outermost, is thicker than the rest,

the flagellum of the vibraculum is of considerable length, the lateral avicularia are small,

radical fibres are toothed and spring from the side of the vibraculum.

Cargados, 28 fath. ; Saya de Malha, 125 fath.; fragmentary pieces only.

9. Scrupocellaria obtecta, Haswell, Proc. Linn. Soc. New South Wales, v, pt. i,

p. 37.

18—2

140 PERCY SLADEN TRUST EXPEDITION

There are some colonies of a Scrupocellaria, having the large figured scutum, the small

lateral and anterior avicularia and the perforated ocwcia of Hincks’* and MacGillivray’st

specimens of S. obtecta. They have here, sometimes four, but usually two spines,

the lower pair usually stout and forked. Hincks speaks of two, simple spines, and

MacGillivray of only one. There are none of the occasional large, lateral avicularia of

Hincks’ specimens, the median avicularium varies a little in size and has often a serrated

beak, the vibraculum is like Hincks’ and is longer than in MacGillivray’s specimens: The

forked spines, figured scutum and perforated ocecium the present specimens have in common

with S. cervicornis, but they are larger, more robust and less glassy than that species,

Amirante, 29 fath.; Cargados, 30 fath. ; Providence, 50—78 fath.

10. Scrupocellaria frondis, Kirkpatrick, J ourn. Linn. Soe. Zool., xx, 1890, p. 504.

The spines, median avicularia and ocecia correspond with those of this species, the

characteristic antler-like spine being a marked feature. There are, however, lateral

avicularia present here and the scutum is different, being spade-shaped, sometimes much

elongated, so as to make a curved band right over the front of the aperture, extending

even beyond it, and covered by a tree-like tracery. Median avicularia are small and have

pointed mandibles directed downwards and outwards. There is a toothed radical fibre.

The one small specimen is of a delicate vitreous nature, with some resemblance to

S. cervicornis.

Amirante, 29 fath.

11. Serupocellaria macandrei, Busk, Brit. Mus. Cat., i, p. 24.

These specimens have the broad granular margin to the aperture, the large lateral

avicularia and the raised median avicularia and the 4—5 spines of Busk’s{ species. The

eminence carrying the median avicularium is tall and leans from the base of one zocecium

to about the base of the peduncle of the scutum of the opposite zocecium. The ocecium is

smooth, with an oval, flattened area on the front wall in some cases. The vibracular cell

is wedge-shaped, reaching right across the back of the zocecium, the vibraculum is smooth,

about twice the length of the groove it rests in; there are two vibracula in each fork of

a branch. Colonies are slender, of a yellowish colour.

Providence, 50—78 fath.; Amirante, 29 fath.; Farquhar, reef; Cargados, 30 fath. ;

Seychelles, 34 fath.

12. Caberea boryi (Aud.).

Crisia boryi, Aud., Descrip. de Egypte, Nat. Hist., i, p. 72; Busk, Brit. Mus.

Catan pee oe:

The one small colony of this form has the scutum more developed below its peduncle

than above, the upper portion often extending across and uniting with the side of the

zocecium as in Busk’s variety zelanica, pl. 16, figs. 4—5. There is not the stout spine

near the peduncle of the scutum, as is usual in this variety, the lower zocecia on a branch

having none and the upper four slender spines only, if any. Avicularia as in C. rostrata,

* Ann. Mag. Nat. Hist., ser. 5, xi, p. 193. + MacG., Prod. Zool. Vict. Dec. xiii, p. 102.

+ Rep. Challenger Exp., x, pt. xxx, p. 23.

THORNELY—MARINE POLYZOA OF THE INDIAN OCEAN 141

Busk*, are small usually, but replaced here and there by a large one, raised on a prominent

rostrum and having a triangular mandible, the largest of these being situated below the

fork of a branch. Besides these there are large spatulate avicularia on the sides of the

branches near a fork, seen best from behind. Setz are long and serrated. Ocecia have an

arched ridge across the front and are so numerous that the zocecia are partly concealed.

Cargados, 30 fath.

138. Canda retiforms, Pourtalés, Bull. Mus. Comp. Zool., Camb. Mass., p. 110.

These specimens have the peculiarly long, pointed upper half to the fornix described

by Miss Phillipst. There are sometimes two spines instead of one on the inner margin of

the zocecium. Where avicularia are present they are situated above the ocecia. Vibracula

are not so long as figured by Smitt{. Ocecia have a semicircular area in front. There is

abundant material of this species.

Amirante, 23—29 fath.; Saya de Malha, 55 fath.; Seychelles, 39 fath. ; Cargados,

30 fath.

14. Pollaplecium gilbertensis, Maplestone, Proc. Roy. Soc. Vict. n.s. p. 417, 1909.

Cargados, 30 fath.; Providence, 50—78 fath.; Saya de Malha, 150 fath. ; Amirante,

23 fath.

15. Bugula dentata, Lamx.

Acamarchis dentata, Lamx, Exp. Méth. p. 6; Busk, Brit. Mus. Cat., i, p. 46.

This species answers to Busk’s description of B. dentata in all respects but that the

ocecia are not blue. They are set a little to one side, owing, apparently, to the three spines

occupying so much space on the outer margin of the zocecium. The spines are jointed and

are often broken off at the joints.

Amirante, 29—34 fath.

16. Bugula gracilis, Busk, Quart. Journ. Micro. Sci, vi, p. 125.

Amirante, 29 fath.

17. Bugula neritina (Linn.). Waters, Journ. Linn. Soc. London, Zool., xxxi, 1909,

p:. 135.

There are several broken pieces of this species with avicularia present.

Providence, 50—78 fath. ; Amirante, 34 fath. ; Cargados.

18. Bugula neritina, var. minima, Waters, Journ. Linn. Soc. London, Zool., xxxi,

1909, p. 136.

There are colonies } in. in height growing on seaweed.

Cargados, reef; Providence, 50—78 fath.

19. Bugula neritina, var. rubra, nov. (Pl. 8, fig. 1). This variety has the shape of

zocecium, with pointed outer angle and the sideways position of the ocecium of B. neritina.

The colonies are reddish brown in colour, robust and about 1} in. in height. The whole

* Rep. Challenger Exp., x, pt. xxx, p. 28. + Willey’s Zool. Results, p. 439, 1900.

t Flor. Bry., p. 16, 1873.

142 PERCY SLADEN TRUST EXPEDITION

front wall of the zocecium is occupied by the aperture, which is wide and open. Avicularia

are situated a little way up the margin of the aperture on long, stout peduncles, they have

a powerful long, curved beak with a sharp tooth midway on the lower edge. This and

the position of the ocecium make a marked difference in this species from B. robusta,

MacGillivray*, which it somewhat resembles.

Amirante, 34 fath. ; Providence, 50 fath.

20. Bugula neritina, var. tenuata, nov. (Plate 8, fig. 2). :

This variety has the same shape of zocecium as the last, with pointed outer angle, no

spines, and has the ocecium turned sideways. The colonies are about 2 inches in height

where they are broken off, they are thin and straggling, of a yellowish grey colour. Zocecia

are almost uniserial in their arrangement, the aperture occupies about % of the front

wall, the sides of the zocecium are curved inwards, narrowing the aperture. Avicularia

are borne on long, slender peduncles and are situated below the aperture; they are

globular with short parrot-like beaks.

Cargados, 28 fath.

21. Bugula neritina, var. ramosa, nov. (PI. 8, fig. 3).

This variety is of a red colour. Branches are given off at right angles from the sides

of zocecia, rounded and narrowed towards their bases and with a joint near there. Zocecia

are uniserial on the upper portion of the colony, turning alternately to either side, the

lower portion attached and lying against the back of the zocecium below, the upper portion

free, its front wall entirely occupied by the aperture, which is covered by a reddish

membrane. The sides of the zocecium curve inwards considerably, and a few perforations

are to be seen along their margins. Avicularia are rarely to be seen, they are small, on

fairly long peduncles, and situated below the aperture as in the last species. The ocecium

has a pitted surface.

There are merely fragments of this species growing among Canda retiformis. It

resembles B. wniserialis, Hinckst, but is much larger, red, and branches differently.

Amirante, 23 fath.

22. Beania intermedia (Hincks).

Diachoris intermedia, Busk, Ann. Mag. Nat. Hist., ser. 5, vii, 1881, p. 133.

Indian Ocean.

23. Membranipora normaniana (d’Orb.). Waters, Journ. Linn. Soc. London, Zool.,

XXvi, p. 670.

There are numerous representatives of this species encasing stems of Hydroids and

other objects.

Providence, 50—78 fath. ; Amirante, 32 fath.

24. Membranipora radicifera, Hincks, var. intermedia, Kirkpatrick, Proc. Roy.

Dub. Soe., vi, p. 615.

Salomon, 75 fath.

* MacG., Prod. Zool. Vict. Dec. viii, p. 29. + Ann. Mag. Nat. Hist., ser. 5, xiii, 1884, p. 367.

THORNELY—MARINE POLYZOA OF THE INDIAN OCEAN 143

25. Membranipora pedunculata, Manzoni, Bry. fr. Ital. 4* cont. sitzb. d. k. akad.

d. Wissensch., lxi, p. 7; Hincks, Ann. Mag. Nat. Hist., ser. 5, vi, 1880, p. 377.

There are a few zocecia with ocecia attached growing on a small bit of shell and corre-

sponding with Hincks’ description of this species. There are mixed up with this colony

some zocecia with two spines at the top and two avicularia pointing upwards on either

side, below the spines. These zocecia, which differ entirely from those I have referred to

M. pedunculata, must belong to another colony, but are growing as one with M. pedun-

culata on the shell.

Saya de Malha, 125 fath.

26. Membranipora variegata, Hincks, Ann. Mag. Nat. Hist., ser. 5, viii, 1881,

p. 131.

The spines are, as Hincks describes, dark at their bases, the upper four standing

upright and thicker, while the six or seven lower ones lie across the zocecium and are more

slender. None have the tendency to become clavate. Ocecia, not seen by Hincks, are

smooth with an arch across the centre as in M. lineata, Linn., which is either pointed or

square, with sometimes a very small avicularium directed upwards in the centre above it.

Providence, 50—78 fath.

27. Membraniporw savartu (Aud.). Waters, Ann. Mag. Nat. Hist., ser. 5, xx, 1887,

p. 181.

There is a small but good colony of this form, brownish in colour owing to the

membranous covering, which is well preserved. There are calcareous nodules at the bases

of the zocecia, one or two, according to the width of the zocecium, and there are denticles on

the upper margin of the calcareous portion which incline backwards into the orifice and

are jagged at their edges.

Providence, 50—78 fath.

28. Membranipora granulifera, Hincks, Ann. Mag. Nat. Hist., ser. 5, vi, 1880, p. 72.

Providence, 50—78 fath. ; Amirante, 25—80 fath.

29. Onychocella velata (Hincks), Ann. Mag. Nat. Hist., ser. 5, viii, 1881, p. 130.

The one specimen of this form in the collection is old and the colour faded to a very

pale brown. The crenulated margin of the zocecium is broad. There is only one broken

avicularium present, but enough to show the right position and shape. There are several

ocecia.

Saya de Malha, 29 fath., growing on a piece of old shell.

30. Micropora coriacea (Esper.). Hincks, Brit. Mar. Pol., 1880, p. 174.

This is Hincks’ variety which has no nodular enlargements of the margin below the

orifice but unlike Hincks’ variety they have avicularia as on his ordinary species. No

ocecia are present.

Providence, 50—78 fath. ; Saya de Malha, 125 fath.

144 PERCY SLADEN TRUST EXPEDITION

31. Micropora brevissima, Waters, Expéd. Antarct. Belge, 1904, Bryozoa, p. 40.

Providence, 50—78 fath. ; Saya de Malha, 125 fath.; Salomon, 75 fath.

32. Micropora bouchardu (Aud.) (Pl. 8, fig. 4).

Flustra bovchardii, Aud., Descrip. de ’Egypte, Hist. Nat. i, Pl. 9, ptegea CIR

This striking species, of which there is only one very small colony, growing on a

coral, resembles Savigny’s figure, Pl. 9, fig. 11, described by Audouin as Flustra

bouchardi. The zoarium is incrusting, covered by a thin yellowish membrane. Zocecia

large, prominent, perforated over the entire front wall. Orifice arched above, the lower

margin slightly convex, surrounded by six thick spines, black at their bases. A pore on

either side of a central keel below the orifice. No ocecia.

Providence, 50—78 fath.

33. Membraniporella magnifica, n. sp. (Pl. 8, fig. 5).

Zoarium incrusting in large, yellow patches. Zocecia fairly close together, large, with

from five to six prominent ribs on either side, which fork before uniting in the centre,

forming a double irregular row of holes there, an erect spine-like process on each rib near

its outer edge. Orifice large, spreading towards the base, a spine on either side and

several flat, forked spines above. Ocecia flat, peaked above, or sometimes with three peaks,

the middle one the highest, they appear to be membranous; the flattened spines lying

behind, and showing above them.

Cargados, 30 fath.

There is a large dried colony of this beautiful species, measuring about two inches

across, unfortunately much broken. It has some resemblance to (?) Membraniporella

aragov (Aud.).

34. Cribrilina radiata (Moll). Busk, Report Challenger Exp., pt. xxx, p. 181.

Providence, 125 fath. ; Saya de Malha, 29 fath. ; Salomon, 75 fath.

35. Cribrilina radiata, var. flabellifera, Kirkpatrick, Ann. Mag. Nat. Hist., ser. 6,

1, 1888; ps 75:

The avicularia here have much wider wings than are figured by Kirkpatrick.

Providence, 50—78 fath.

36. Cribrilina figularis (Johnston). Hincks, Brit. Mar. Pol., p. 196.

There is one colony of this species without avicularia, growing on a piece of coral.

Salomon, 60—120 fath.

37. Cribrilina reticulata, n. sp. (Pl. 8, fig. 6).

Zoarium composed of zocecia widely separated by a reticulate, calcareous expansion,

giving off erect processes here and there, which bear avicularia on their summits. Zocecia

small and neat with from 9—11 finely perforated furrows on either side of a central line,

THORNELY—MARINE POLYZOA OF THE INDIAN OCEAN 145

the ridge below the uppermost furrow rather more raised than the rest, forming a screen

below the orifice. Orifice with two spines near together, above, which bend forward, and

two lateral broader spines which unite in the centre, making an arch over the orifice. Ocecia

small, rounded and smooth.

Providence, 50—78 fath.

There is only one small colony of this species, growing with many other species on a

small bit of coral. It is smaller and more delicate than C. annulata.

38. Steganoporella magnilabris (Busk).

Membranipora magnilabris Busk, Brit. Mus. Cat., ii., p. 62.

Amirante, 20—25 fath.

39. Thalamoporella rozeri, Aud.

Steganoporella rozeri, Hincks, Ann. Mag. Nat. Hist., ser. 5, vi, 1880, p. 379.

Some colonies are growing in the form of hollow tubes, one is incrusting a stick and

one a coral. They have the ocecia of Hincks’ form indica and the avicularia both of that

form and of form falcifera.

Amirante, 20—35 fath.; Farquhar atoll; Cargados, 30 fath.; Coin, Peros.

40. Bifaxaria vagans, n. sp. (PI. 8, fig. 7).

Zoarium erect, calcareous, of a dull brown colour, with lighter coloured tips, forking at

regular intervals; branches not all in one plane, with corneous joints near their bases.

Zocecia elongate, perforated, distinctly divided from each other. Orifice with raised peri-

stome enclosing a small pointed avicularium, which is directed upwards from a central

position and leaves a sinus in the margin when absent. There are no ocecia.

Seychelles, 34—39 fath. ; Amirante, 34 fath.

There is a good quantity of this species, which has the appearance of a sertularian

hydroid to the naked eye. It is placed provisionally under the genus Bifaxaria, being

closely allied to B. reticulata.

41. Salicornaria tenuirostris, Busk, Brit. Mus. Cat., i, p. 17.

These specimens are about 2 inches in height, their avicularia are not so attenuated

as in Smitt’s* figure and in some colonies are very much shorter than in others, where

the mandible is almost triangular, leaning forward. There are several colonies in the

collection.

Seychelles, 39 fath.; Amirante, 32 fath.; Cargados, 28—30 fath.; Providence,

50 fath.

42. Tubucellaria cereoides (Ellis and Solander). MacGillivray, Prod. Zool. Vict.

Dec. ii, p. 18.

Cargados, 28 fath. ; Saya de Malha, 29—145 fath.

* Floridan Bryozoa, p. 4, Pl. I, fig. 57. ;

SECOND SERIES—ZOOLOGY, VOL. XV. 19

146 PERCY SLADEN TRUST EXPEDITION

43. Tubucellaria cereoides, var. chuakensis, Waters, Journ. Linn. Soc. London,

Zool., xxx, 1909, p. 130.

Providence, 50—78 fath.

44. Tubucellaria zanzbarensis, Waters, Journ. Linn. Soe. London, Zool., xxx,

p. 181.

Saya de Malha, 145—150 fath.; Farquhar, reef; Cargados, 28 fath.

45. Microporella ciliata (Pallas).

Eschara ciliata, Pallas. Hincks, Brit. Mar. Pol., p. 206.

Providence, 50—78 fath. ; Cargados; Saya de Malha, 125 fath.

46. Microporella hyadesi (Jullien).

Fenestrula hyadesi, Jullien, Mission Scientific du Cap Horn, p. 44; Waters, Journ. ©

Linn. Soc. London, Zool., xxix, 1909, p. 237.

There are no foliaceous expansions of the zoarium among the specimens in this

collection which are all incrusting; the zocecia are perforated throughout, the margins

of the orifices are smooth below, with three spines above, usually; the avicularian

mandible has large wings.

Providence, 50—78 fath. ; Saya de Malha, 47 fath.

47. Microporella diadema, MacGillivray.

Lepralia diadema, MacGillivray, Trans. Roy. Soc. Vict., ix, p. 8, 1868.

There are, unfortunately, none of the peculiarly marked ocecia present in this colony.

Providence, 50—78 fath.

48. Microporella renipuncta, MacGillivray, Trans. Roy. Soc. Vict., xix, p. 130, 1882.

There is a very small colony of this form without avicularia or ocecia, but recognisable .

from its distinctive pore.

‘Providence, 50—78 fath.

49. Microporella malusit (Aud.) (Pl. 8, fig. 8). Hincks, Brit. Mar. Pol., p. 211.

Zocecia very large, about twice the size of the usual British species, regularly marked |

all over by opaque, white spots, an oval or kidney-shaped pore not far below the orifice.

No avicularia. Ocecia smooth, resting on a broad ridge at the back.

Saya de Malha, 125 fath. The only colony of this kind is old and worn in parts and

is adhering to a piece of old shell.

50. Microporella magnirostris (MacGillivray), Trans. Roy. Soc. Vict., xix, p. 134,

1882.

Amirante, 35 fath.

51. Lagenipora tuberculata, MacGillivray, Trans. Roy. Soc. Vict., xix, p. 132, 1882.

Providence, 50—78 fath.

THORNELY—MARINE POLYZOA OF THE INDIAN OCEAN 147

52. Lagenipora spinulosa, Hincks, Ann. Mag. Nat. Hist., ser. 5, xiii, 1884, p. 210.

Amirante, 38 fath. Small, erect colonies, growing on Nellia oculata,

53. Retepora monilifera, MacGillivray, var. nov., Trans. Phil. Inst. Vict., iv, pt. 2,

p. 168; MacG., Prod. Zool. Vict. Dec. x, p, 19.

The representatives of this species in the present collection do not correspond exactly

with any of MacGillivray’s various forms, but have usually the following characters: a

central pore, more or less complete; the edge of the lower margin of the orifice sometimes

crenulated ; an avicularium to one side of the pore and close up to the margin, not always

present, sometimes another below this one, and there are long pointed avicularia situated

at the bases of some of the fenestrze, the mandible when at rest lying between the two

points of the beak. There are no avicularia on the dorsal surface. Ocecia have a long

vertical band and a shorter horizontal one, an avicularium on one or both sides of the

vertical band. These characters are more or less constant on the many colonies and

fragments of colonies in the collection.

Seychelles, 39 fath.; Amirante, 29—30 fath.; Cargados, 28 fath.; Providence,

50 fath.; Saya de Malha, 47 fath.; Diego Garcia, 12 fath.

54. Retepora porcellana, MacGillivray, Trans. Roy. Soc. Vict., ix, p. 140, 1868;

MacG., Prod. Zool. Vict. Dec. x, p. 15.

Seychelles, 39 fath.; Amirante, 25—30 fath.; Saya de Malha, 150 fath. ; Cargados,

28 fath.

55. Retepora denticulata, Busk, Report Challenger Exp., x, pt. xxx, p. 109.

There is a colony an inch in height. There are no barren trabeculze, the zoarium is

dichotomously branched, the tips of the branches bending over and uniting. The zocecium

has a flat, roughened surface, a tubular notched peristome, much indented round the

‘margin, one side often higher than the other, an eminence on the front of the zocecium

bearing an avicularium with a two-pointed beak and a mandible ending squarely, the

angles more or less pointed. There are larger avicularia at the forks of branches, having

wide, three-pointed mandibles, and there is an occasional small elongated avicularium on

the dorsal surface. Older colonies have the orifice much sunk, the rostrum, bearing an

avicularium, being level with the surface of the zocecium. There is a small broken piece of

a colony from Seychelles, which may not be the same species. It has more slender

branches, a small avicularium just below the lower margin of the orifice instead of the

large frontal one, while the large avicularium at the fork of the branches is divided into

four fingers. There are no ocecia on this species.

Amirante, 15—35 fath.; Seychelles, 34 fath.

56. Schizoporella cecilit (Aud.). Hincks, Brit. Mar. Pol., p. 269.

Providence, 50—78 fath.

57. Schizoporella triangula, Hincks, Ann. Mag. Nat. Hist., ser. 5, viii, 1881, p. 12.

Providence, 50—78 fath.

19—2

148 PERCY SLADEN TRUST EXPEDITION

58. Schizoporella spongites (Smitt).

Hippothoa spongitis, Smitt, Floridan Bryozoa, 1872, p. 42.

Cargados, 30 fath.; Amirante, 30 fath. Large colonies.

59. Schizoporella viridis, Thornely, in Herdman’s Report on Pearl Oyster

Fisheries of the Gulf of Manaar, 1905, xxvi, p. 116; Waters, Journ. Linn. Soc. London,

ser. 2, Zool., xxx p. 147, 11909:

There are large thick colonies of this species and also thin layers growing on a sea-

weed. Young zocecia always have one large avicularium, above the orifice, only.

Eemont, reef; Providence, 70 fath.; Coetivy.

60. Schizoporella nivea, Busk, Report Challenger Exp., x, pt. xxx, p. 163.

There are some small colonies corresponding to the description of this form, but that

they are loosely adherent instead of entirely free growing, and the lateral processes are

replaced by avicularia.

Amirante, 29 fath.; Seychelles, 39 fath.; Providence, 50—78 fath.

61. Schizoporella biaperta, Michelin. Hincks, Brit. Mar. Pol., 1880, p. 255.

There are none of the large avicularia borne on mamillz as described by Hincks for

his species. The margin of the orifice is thickened below, and a keel-hke ridge runs

downwards from it. The ocecia have an arched ridge across the front of them. The colony

is glistening white.

Providence, 50—78 fath.

62. Schizoporella circinnata (MacGillivray).

Lepralia circinnata, MacGillivray, Trans. Roy. Soc. Vict., xix, p. 134; Hincks,

Ann. Mag. Nat. Hist., ser. 5, xv, 1885, p. 253.

The one good colony of this species has its younger zocecia smooth, with a single row

of punctures round the margin and those that are older roughened and punctured all over

the surface ; ocecia resemble the zocecia. The umbo on these colonies is usually central,

below the orifice, but sometimes there are two, which have small rounded avicularia

directed outwards. ;

Cargados, 30 fath.

63. Schizoporella armata, Hincks, Brit. Mar. Pol., p. 258.

There are from 6—8 spines on these specimens; they are much broken but appear to

vary from being slender to thick. The species S. scintillans, Hincks*, unless too small,

seems to be identical with this species.

Saya de Malha, 47 fath.; Providence, 125 fath. .

64. Schizoporella lata, MacGillivray, Trans. Roy. Soc. Vict., xix, p. 182; MacG.,

Prod. Zool. Vict. Dec. xiv, p. 145.

These specimens do not quite correspond with MacGillivray’s description. The sinu

* Ann. Mag. Nat. Hist., ser. 5, xv, 1885, p. 143.

THORNELY—MARINE POLYZOA OF THE INDIAN OCEAN 149

appears to be narrower and more rounded below, the avicularium has a small, pointed

mandible as in fig. 2, pl. 138, and above it there is a swollen semi-lunar area. The zocecia

are about half the size of S. triangula.

Saya de Malha, 150 fath.

65. Schizoporella subsinuata, Hincks, Ann. Mag. Nat. Hist., ser. 5, xiv, 1884, p. 280.

There is a small, old colony adhering to a Cellepora, it resembles MacGillivray’s*

species in having avicularia, but these are smaller than his and turn various ways,

usually there is a pair, one on either side of the orifice high up, sometimes a double

pair; all are raised on small bosses and slightly pointed.

Saya de Malha.

66. Schizoporella dutertret (Aud.) var. pes-anseris (Smitt).

Hippothoa pes-anseris, Smitt, Floridan Bryozoa, 1872, p. 43.

Providence, 50—78 fath.

67. Schizoporella hyndmani (Johnston). Hincks, Brit. Mar. Pol., p. 281.

The peristome of this species is very much raised, concealing the primary orifice, it

is elliptical, not tubular, and the upper and lower margins, being more developed than the

lateral, gives a two-lipped appearance. The ocecium is situated behind this and does not

quite reach to the top. The mandibles of the avicularia are not very long. The surface

of the zocecium is smooth, but there are faintly seen perforations on some. The front wall

is raised at the sides and flattened centrally.

Providence, 50—78 fath.

68. Gemellipora glabra, form striatula, Smitt, Floridan Bryozoa, p. 37, 1872.

Amirante, 22—85 fath.; Saya de Malha, 29—125 fath.

69. Gemellipora lata, Smitt, Floridan Bryozoa, p. 36.

Saya de Malha, 29 fath.

70. Lhyncozoon bispinosa (Johnston).

Rhynchopora bispinosa, Hincks, Brit. Mar. Pol., p. 385.

There is a small, pinkish white colony of this species. The primary orifice is very

slightly sinuated, the front wall covered by small, rounded avicularia, one of them larger

and longer, having a blunt end and lying below the orifice, crosswise. There are several

rounded spine-like processes round the margin, besides the umbo, which carries an avicu-

larium on its side.

Saya de Malha, 29 fath.

71. Rhyncozoon incisor, Thornely, Herdman’s Rep. on Pearl Oyster Fisheries, 1905,

p. 118.

* Prod. Zool. Vict. Dec. xiv, p. 147.

150 PERCY SLADEN TRUST EXPEDITION

The uncinnate process is much less developed than in the Manaar specimens and the

avicularium is higher up inside the tubular orifice. There is only one small colony.

Providence, 50—78 fath.

72. Lepralia turrita, Smitt, Floridan Bryozoa, p. 65.

Amirante, 29 fath.; Cargados, 30 fath.

73. Lepralia poisson, Aud. Hincks, Ann. Mag. Nat. Hist., ser. 5, xv, 1885, p. 256.

Providence, 50—78 fath.

74. Lepralia clecdostoma, Smitt, Floridan Bryozoa, p. 62.

The species in this collection has zocecia with thickly calcareous front walls glistening

and granular, having 2—3 spines on marginal cells and a sharp pointed avicularium,

directed upwards, on either side of the orifice. Ocecia have the same calcareous surface as

the zocecia and are cucullate.

Amirante, 35 fath.

75. Lepralia feegeensis, Busk, Report Challenger Exp., x, pt. xxx, p. 144.

Cargados. A good colony growing on a Cellepora.

76. Lepralia crassa, n. sp. (Pl. 8, fig. 9).

Zoarium loosely attached, covered by a brown epitheca. Zocecia large, flat with raised

margins, evenly punctured with large perforations, a raised calcareous reticulation of the

front wall in later stages of growth. Orifice arched above, spreading near the base with

a straight lower edge. Avicularia long and pointed, situated on one or both sides of the

orifice about half-way up and directed upwards, nearly meeting above; frequently a third

avicularium some way below the orifice, directed sometimes one way sometimes another, also

long and pointed. Ocecia large, more prominent than the zocecia and finely punctured

throughout, resting on a ridge-like base. Dorsal surface of zocecia smooth, elongate with

a small separate area at the top occupied by what is probably a perforated plate, but

the membranous covering is absent. On some zocecia there are clusters of radical fibres.

Cargados, 30 fath.

This species appears to be most nearly allied to Lepralia dorsiporosa, Busk *, but

the epitheca is brown, the pore is smaller and there is no perforated membrane over it,

also the avicularia are very different; ocecia were not seen on L, dorsiporosa.

77. Lepralia marginata, n. sp. (Pl. 8, fig. 10).

Zocecia small and neat, square or elongate with a raised margin and finely punctured,

the surface becoming roughened with age. Orifice almost round with two spines close

together above on young zoccia and a tooth on either side, interiorly, more than half-way

down, The roundness of the orifice is disguised by an inner lining which is.arched

above and ends abruptly a little above the lateral teeth, leaving a hollow or sinus

* Report Challenger Exp., x, pt. xxx, p. 143.

THORNELY—MARINE POLYZOA OF THE INDIAN OCEAN Tox

between. There is no indication of this form in the operculum. Avicularia on lateral

eminences about on a level with the lower margin of the orifice or below it, pointed and

directed forwards and downwards. Ocecia fairly large, rounded and with the same surface

as the zocecia.

Amirante, 125 fath.

78. Lepralia depressa, Busk, Brit. Mus. Cat., 11, p. 75.

These specimens are roughly calcareous. There is no perceptible difference in the

size of the orifice in fertile and non-fertile zocecia. There are from 2—4 spines above the

orifice on some zocecia. Avicularia are short and pointed, directed upwards, usually, one

on either side of the orifice as in Smitt’s* species Hscharella rostrigera.

Salomon, 75 fath.

79. Lepralia bicornis, n. sp. (Pl. 8, fig. 11).

Zoarium yellowish grey, incrusting. Zocecium with large orifice situated almost in the

centre of its five-sided form, surface thick, opaque white, raised round the orifice, with

faintly perceptible lines radiating towards the margin, where there are perforations.

Orifice arched above widening downwards with an almost straight lower margin. A small,

round avicularium to one side of the orifice or sometimes below it, large spatulate

avicularia on separate areas scattered here and there over the zoarium. Ovcecia of moderate

size, rounded.

Cargados, 30 fath.; Salomon, 75 fath.

The orifice of this species is about the size of that of L. pallasiana, the zocecium is

shorter than that species and rounder and not punctured on the surface, and there are

numerous avicularia.

80. Porella concinna var. gracilis, Hincks, Brit. Mar. Pol., p. 324.

Providence, 50—78 fath.

81. Porella nitidissima, Hincks, Ann. Mag. Nat. Hist., ser. 5, vi, 1880, p. 78.

Amirante, 29 fath.; Saya de Malha, 125 fath.

82. Smittia signata, Waters, Ann. Mag. Nat. Hist., ser. 6, iv, 1889, p. 17.

Saya de Malha, 125 fath.

83. Smittia landsborovii, Johnston. Hincks, Brit. Mar. Pol., p. 341.

Saya de Malha, 125 fath.

84. Smittia marmorea, Hincks, Brit. Mar. Pol., p. 350.

Amirante, 34 fath.

85. Smuttia tubula, Kirkpatrick, Ann. Mag. Nat. Hist., ser. 6, i, 1888, p. 79.

Providence, 50 fath.

86. Smuttia affinis, Hincks, Brit. Mar. Pol., p. 348.

There is a very little colony with small zocecia, which are smooth with marginal

* Floridan Bryozoa, p. 57.

152 PERCY SLADEN TRUST EXPEDITION

perforations. There are four spines above the orifice, which is channeled below and has

a wide central and two small, lateral denticles within its lower margin. There is an

avicularium placed sideways, sloping across below and almost over the channel in the

peristome. There are no ocecia.

Seychelles.

87. Smttia glomerata, n. sp. (Pl. 8, fig. 12).

Zoarium loosely incrusting, yellow, mamillate. Zocecia small, rotate or elongate, more

or less raised in front or only the margins raised, giving a honeycomb appearance, turning

various ways and heaped upon each other often, the surface roughened, perforated at the

margin and sometimes with lines radiating from the orifice outwards. Orifice round or |

slightly pointed below with a central and two lateral denticles within, the peristome

raised sometimes all round, sometimes at the back and sides, sometimes at the front

and sides, there are crenulations within, below the upper margin, and above this a mark

as it were the base of a single spine or, more rarely, of two. Avicularia to one side of

the orifice, small and spatulate or pointed and raised on an eminence, or large and the

length of the zocecium or sometimes pointed with a serrated beak. Ocecia with an arched

perforated area and raised process above.

Cargados.

88. Smittia trispinosa, Johnston. Hincks, Brit. Mar. Pol., p. 353.

There are several thin, brown, incrusting colonies which have a good deal of variation

to be noticed in the avicularia, spines and height of the peristome. They have all the

usual three denticles below and crenulated inner edge to the peristome above, the front

walls of the zocecia roughened, with a perforated margin and ocecia with a perforated area

in front, and sometimes raised processes above. Spines vary from 1—3.

Cargados, 20—30 fath.; Saya de Malha, 29 fath.

89. Smattia nitida, Verrill. Hincks, Ann. Mag. Nat. Hist., ser. 5, vii, p. 159.

The surface of the zocecium is finely granular; there are four spines above the

orifice; avicularia are directed outwards and downwards. This is a large species like

S. reticulata.

Saya de Malha, 47—125 fath.; Salomon, 75 fath.

90. Smittea ornata, n. sp. (Pl. 8, fig. 13).

Zoarium forming thick layers of a pale brown colour covered by a transparent

membrane, zocecia large, broad, with slightly roughened surface, perforated round the

margin. Orifice with the peristome much raised at the sides, often two spines above

or a broad flat process in their place on the upper margin continuous with the raised

sides of the peristome. Avicularia very varied in size, shape and position; usually a

large pointed one on either side of the orifice, directed upwards and lying against the

raised peristome, often a very large spatulate one, instead, lying across the zocecium

and almost covering it, or, there may be numerous, small, rounded and scattered

THORNELY—MARINE POLYZOA OF THE INDIAN OCEAN 153

avicularia. ‘There is a medium-sized central and two small lateral denticles within the

orifice. Ocecia are smooth with a semicircle of curious raised, rounded bosses.

Saya de Malha, 150 fath.

91. Smittia murarmata, Kirkpatrick, Ann. Mag. Nat. Hist., ser. 6, i, 1888,

mee, pl. 8, f. 5. (Pl. 8, fig. 14.)

The best colony in this collection is of a red colour and has often two instead of

only one large avicularium. They are raised on the peristome on the sides of the orifice,

reaching from rather below this and curving over the top. There are other colonies

that have only one avicularium and shorter, looking more like Kirkpatrick’s figure.

Ocecia, not seen before, are rather flat and have an area of irregular shaped and sized

perforations in front, being smooth above.

Cargados, 30 fath.

92. Phylactella columnaris, Kirkpatrick, Ann. Mag. Nat. Hist., ser. 6, 1, 1888, p. 79.

Providence, 29 fath.

93. Phylactella galeata, n. sp. (Pl. 8, fig. 15).

Zoarium incrusting, pale brown, each large zocecium seen standing out separately by

the naked eye. Zocecia with thick walls perforated round the margin with two or three

rows of large holes, rising to a long, tapering, tubular neck with a thick rim having a

small, pointed mucro on the lower margin, usually, and 10—12 thick, oral spines above.

The primary orifice has a central, broad and two lateral, small, pointed denticles. Ocecia

are raised on the tubular peristome arching over the orifice like a helmet, all the spines

showing in front of it.

Salomon, 75 fath.

94. Mucronella coccinea, Abild. Hincks, Brit. Mar. Pol., p. 371.

Providence, 50—78 fath.

95. Mucronella porelliformis, Kirkpatrick, Ann. Mag. Nat. Hist., ser. 6, i, 1888, p. 8.

There are eight spines round the orifice on this species instead of the usual six, and

where the ocecia are present they all show in front of it. They are long and slender.

The orifice has a tooth on either side but none in the centre, the crenulated mucro and

long, pointed avicularia directed upwards on either side of the orifice and the small zocecia

with glistening verrucose surface are as described by Kirkpatrick. There are, sometimes,

two additional, small, pointed avicularia also directed upwards. Ovcecia are open in front.

Providence, 29—78 fath.

96. Mucronella delicatula, Busk, Report Challenger Exp., x, pt. xxx, p. 156.

Amirante 25—80 fath.; Seychelles; Cargados, 28 fath.

This species closely resembles var. a of Smattia trispinosa, Johnston *.

97. Mucronella ellerii, MacG. var. multi-aviculariata, nov. (Pl. 8, fig. 16.)

This variety has 20 marginal spines and has an enormous number of avicularia.

* Hincks, Brit. Mar. Pol., p. 353.

SECOND SERIES—ZOOLOGY, VOL. XV. 20

154 PERCY SLADEN TRUST EXPEDITION

There is the usual raised avicularium below the orifice and often a small rounded one

on the other side of the rostrum ; there are small, round raised avicularia scattered round

the orifice and over the ocecium and there are many, spatulate and very large, lying

across the zocecia in various ways. The colonies are loosely attached, large, brown

expansions. Qn the dorsal aspect there is, usually, a single pore on the upper margin

of the zocecium, but sometimes there are two or three of these which are probably the

bases of radicle fibres.

Cargados, 20—30 fath.; Amirante, 30 fath.

98. Adeonella subsulcata (Smitt).

Porina subsulcata, Smitt, Floridan Bryozoa, p. 28.

Cargados, 30 fath.; Seychelles, 39 fath.; Amirante, 20—80 fath.

99. Cellepora megasoma, MacGillivray, Prod. Zool. Vict. Dec. xv, p. 183.

This species is fairly abundant in inerusting and foliaceous forms. There is a good

deal of variation in the development of the peristome but the main features of orifice, ©

avicularia and ocecia remain constant.

Amirante, 22—85 fath.; Saya de Malha.

100. Cellepora longirostris, MacGillivray. Phillips, Willey’s Zoological Results,

p- 448.

These specimens have avicularia not mentioned by Miss Phillips, there is usually

one lying across the inner aspect of the rostrum with sharply curved beak, there are

several raised and directed outwards, scattered over the front wall and sometimes

others large and spatulate between the zocecia. Ocecia have faintly radiating lines and

an arched ridge above, as in Miss Phillips’ species and the colonies are incrusting like

hers, not erect like MacGillivray’s*. This species may be identical with Mucronella

tubulosa, Hincksf.

Saya de Malha, 125 fath.; Cargados, 30 fath.

101. Cellepora costata, MacGillivray, Prod. Zool. Vict. Dec. xv, p. 183.

There are little ball-like colonies growing on Hydroids and also some small, freely

branched colonies of this species. They have most of the features of C. costata as

described by MacGillivray, but others that are more like C. rota. ‘The surface is not

fluted but smooth or pitted, the sculptured area on the ocecia is sometimes nearly circular

and the peristome has a thin rim, the avicularia making a ridge up either side of this

almost like in Lagenipora spinulosa.

Saya de Malha, 125—145 fath.; Providence, 50 fath.; Amirante, 35 fath.; Seychelles

34 fath.; Cargados, 29—30 fath.

102. Cellepora vagans, Busk, Report Challenger Exp., x, pt. xxx, p. 198. (Pl. 8,

fig) 7,,)

There are two colonies of what I believe to be this species although they hav

* Trans. Roy. Soc. Victoria, xxi, p. 113, Nov. 1884. + Ann. Mag. Nat. Hist., ser. 5, vi, 1880, p. 383,

THORNELY—MARINE POLYZOA OF THE INDIAN OCEAN 155

three denticles on the lower margin in place of the sinus. The dark membrane,

covering all but the rostra, some branched mandibles to the avicularia and the absence

of marginal spines all correspond with the description of this species rather than with

that of Holoporella tridenticulata (Busk) which it resembles.

Cargados, 28—80 fath.

103. Holoporella tridenticulata (Busk), Report Challenger Exp., x, pt. xxx, p. 198.

There are the curious funnel-shaped processes distributed among the zocecia on these

specimens. There are from 2—4 spines and the usual teeth on the lower margin of the

orifice, but they are not constant in being three, as sometimes one lateral tooth unites with

the central tooth making a sort of sinus to one side, sometimes the central tooth is missing’

leaving a large, central sinus, and sometimes the margin is merely serrated. Avicularia

are of two sorts, small on raised, suboral rostra and large, raised on tall processes, or

sunk between zocecia, and they may be long and dagger like or wide and fan like, the edge

of the beak often serrated. The operculum is either dark, or horn colour. Occia are

cucullate, having the granular surface of the zocecia.

Salomon, 75 fath.; Providence, 29—55 fath.

104. Holoporella albirostris (Smitt). (Busk), Report Challenger Exp., x, pt. xxx,

p- 193.

Amirante, 12—18 fath.

105. Holoporella mamillata (Busk).

Cellepora mamillata, Busk, Brit. Mus. Cat., ii, p. 87.

Amirante, 12—85 fath.

There are large incrusting layers of this species.

106. Holoporella foliata, MacGillivray.

Cellepora foliata, MacGillivray, Prod. Zool. Vict. Dec. xvii, p. 246.

This species is well represented in this collection. There are colonies measuring

2 inches by 24 inches of a yellowish grey colour, growing from thick bases into flattened

hand-like branches which sometimes anastomose with other branches and are studded

over with jagged finger-like processes.

Amirante, 29 fath.; Cargados, 30 fath.; Seychelles, 39 fath.

107. Holoporella simplex (MacGillivray).

Cellepora simplex, MacGillivray, Prod. Zool. Vict. Dec. xvii, p. 241.

This is a large, coarse, brown species with large erect zocecia, caleareous ridges running

often from one to another. One incrusting colony is half an inch thick and measures five

inches across, and has an irregularly mamillate surface, another from another locality is rather

smaller in its parts and grows into tubular branches. The oral and only avicularium

varies in size in the two colonies, a little, it is more raised and the rostrum more raised

above it in the larger incrusting form.

Amirante, 29 fath.; Cargados, 30 fath.

20—2

156 PERCY SLADEN TRUST EXPEDITION

108. Holoporella discoidea (Busk).

Cellepora discoidea, Busk, Report Challenger Exp., x, pt. xxx, p. 197.

This is a large species like the last but the orifice occupies a smaller portion of the

zocecium. There is a colony incrusting in thick layers and one that from an incrusting

base sends up some flattened branches. The oral rostrum is sometimes low with a small

avicularium and sometimes tall and rounded with a large avicularium, in both cases the

beak is serrated.

There are several avicularia lying flat on the front wall of the zocecium. The usual

large vicarious avicularia are spatulate in shape, not lanceolate. The peristome is

sometimes a good deal raised all round the orifice, the surface is roughened and the colour

is light brown.

Saya de Malha, 150 fath.

Cyclostomata.

109. Crisia conferta, Busk, Brit. Mus, Cat., iii, p. 7. (PI. 8, Fig. 18.)

These colonies are an inch in height. In an internode there are never more than —

19 zocecia or more than three branches. ‘There is usually only one branch, but where an

ocecium is present there are usually three, rather near together on the internode, one

below and two above the ocecium. The joints between the series of zocecia vary in colour

from black to pale horn colour. There is a good quantity of this Crisia.

Farquhar atoll, 150 fath.

110. Idmonea atlantica, Forbes. Busk, Brit. Mus. Cat., pt. i, p. 11.

Amirante, 15—80 fath.; Seychelles, 34 fath.; Cargados, 30 fath.

111. Idmonea milneana, D’Orb. Busk, Report Challenger Exp., xvii, pt. i, p. 13.

Providence, 55 fath.; Amirante, 25—80 fath; Saya de Malha, 125 fath.

112. Idmonea serpens (Linn.). Hincks, Brit. Mar. Pol., p. 453.

Saya de Malha.

118. Idmonea radians (Lamk.). Busk, Brit. Mus. Cat., pt. ii, p. 11.

Seychelles, 39 fath.; Amirante, 29 fath.

114. Hornera robusta, MacGillivray, Prod. Zool. Vict. Dec. xu, p. 72.

The largest specimen of this form is 14 by 1 inch in size, it is beautifully branched

but the branches do not anastomose, the peristome is always toothed.

Amirante, 35 fath. a

115. Entalophora proboscidea (M. Edwards). Waters, Expéd. Antarct. Belge

1904, Bryozoa, p. 91. ; ‘

Amirante, 29—35 fath.; Seychelles, 39 fath. F

There are some bits of colonies that, I believe, belong to this species.

PERCY SLADEN TRUST EXPEDITION. TRANS. LINN. Soc. SER.2. Zoon VoL. XV. PL.8.

(THORNELY)

E Wilson, Cambridge

POLYZOA FROM THE INDIAN OCEAN

THORNELY—MARINE POLYZOA OF THE INDIAN OCEAN US ¢/

116. Lichenopora holdsworthi (Busk).

Discoporella holdsworthu, Busk, Brit. Mus. Cat., pt. ii, p. 33.

There are more zocecia in some of the series than Busk mentions, some of the series

have as many as 12, but others are shorter, either curtailed at the outside or the inside of

the series. Some colonies are much less regular than others. There are two rows of pores

between the series, of the same size as those on the central area, which is about the size of

the zocecial orifice. The margins of the zocecia are much broken, but appear to be elliptical,

raised most at the back.

Cargados, 20—28 fath.; Saya de Malha.

117. Cylindrecium giganteum (Busk).

Farella gigantea, Busk, Quart. Journ. Micr. Sc., iv, 1856, p. 93; Hincks, Brit.

Mar. Pol., p. 535.

Cargados; Farquhar, reef.

118. Farella atlantica, Busk, Report Challenger Exp., xvii, pt. i, p. 37.

Amirante, 35 fath.; Providence, 50—78 fath.; growing on hydroids.

EXPLANATION OF PLATE 8.

Fig. 1. Bugula neritina, var. rubra, n.

Fig. 2. Bugula neritina, var. tenuata, n.

Fig. 3. Bugula neritina, var. ramosa, n.

Fig. 4. Micropora bouchardii (Aud.).

Fig. 5. Membraniporella magnifica, n. sp.

Fig. 6. Cribrilina reticulata, n. sp.

Fig. 7. Bifaxaria vagans, n. sp.

Fig. 8. Microporella maluswi (Aud.).

Fig. 9. Lepralia crassa, n. sp.

Fig. 9a. re Dorsal view.

Fig. 10. Lepralia marginata, n. sp.

Fig. 11. Lepralia bicornis, n. sp.

Fig. 12. Smittia glomerata, n. sp.

Fig. 13. Smittia ornata, n. sp.

Fig. 14. Smittia murarmata, Kirkpatrick.

Fig. 15. Phylactella galeata, n. sp.

Fig. 16. Mucronella ellerii, var. multi-aviculariata, n.

Fig. 17. Cellepora vagans, Busk.

Fig. 18. Crisia conferta, Busk.

No. Xl.—FOURMIS DES SEYCHELLES ET DES ALDABRAS, RECUES DE

M. HUGH SCOTT.

Detcrites PAR A. FOREL.

(ComMUNIQUE PAR Pror. J. Stantey Garpiner, M.A., F.R.S., F.LS.)

Lu le 1 février 1912.

En 1907 j’ai énuméré les fourmis des Seychelles, Amirantes, Farquhar et Chagos

récoltées par M. Stanley Gardiner (Transactions of the Linnzan Society of London, ser. 2,

Zool., vol. xii., p. 91) et j’y ai ajouté celles qui avaient été précédemment décrites. Dés

lors une espéce est venue s’y ajouter, la Solenopsis sechellensis Forel (Ann. soc. ent.

Belgique, 1909, p. 55). Les récoltes de M. Scott viennent encore enrichir nos connaissances

sur cette faune intéressante et prouver qu'elle est encore loin d’étre épuisée.

Dans |’énumération suivante, nous marquerons d’une astérique les espéces ou formes

déja connues, mais nouvelles pour la faune des Seychelles et des Aldabras.

1. *Odontomachus hematodes Linn. §%. Seychelles: Mahé. Cosmopolite, sans

doute importé.

2. *Anochetussp. % 2. Indéterminable sans]’ouvriére. Peut-étre africanus Mayr,

var. madagascariensis Forel. Seychelles: Mahé.

3. *Ponera ragusa Emery. §%. Seychelles: Mahé.

4. Leptogenys maaillosa Smith. % (var. vinsonella Dut.). Seychelles: Dennis

Island.

5. Platythyrea wroughtoni Forel, subsp. sechellensis nov.

%. Légérement plus grande que le type de l’espéce, et un peu plus robuste. Téte

plus large, surtout plus élargie derriére, 4 peine plus longue que sa largeur postérieure.

Le bord postérieur du nceud du pédicule a trois festons trés distincts, bien plus distincts

que chez le type de l’espéce. Du reste identique, en particulier la sculpture ; un peu

moins de roux & l’abdomen.

Seychelles : Praslin.

Le type de l’espéce est de l’Inde (Travancore), et de Ceylan.

6. Strumigenys scotti, nov. sp.

%. L. 2,2 & 2,5 mill. Mandibules droites, paralléles, linéaires, aussi épaisses &

Yextrémité qu’a la base, sans bord terminal, longues comme la moitié de la téte; leur bord

externe est 4 peine convexe et leur bord interne 4 peine concave. Elles se terminent par

deux dents longues, pointues, courbées en dedans, dont la supérieure est un peu plus

SECOND SERIES—ZOOLOGY, VOL. XV. 21

160 PERCY SLADEN TRUST EXPEDITION

longue que l’inférieure. Le bord intérieur a en outre prés de son extrémité deux dents

dont la basale est presque deux fois plus longue que la suivante (préapicale). Téte

cordiforme 4 peu prés comme chez godeffroy: Mayr et rogert Emery, mais encore un peu

plus allongée et moins élargie derriére ; sa portion allant de l’épistome au bord occipital

est plus longue que large. Les yeux sont visibles de devant et regardent de cété, le bord

antérieur de la téte, sous les arétes frontales, n’étant nullement incisé devant eux (ce

caractére la distingue nettement de rogert Em., dont elle est du reste fort parente). Le

scape atteint environ le 5me postérieur de la téte. Dernier article de l’antenne environ

aussi long que le reste du funicule. Promésonotum sans suture, ascendant devant, puis

descendant derritre. La 2me moitié du profil du dos du thorax est horizontale,

comprenant le derri¢re du mésonotum et la face basale de l’épinotum qui est plus longue

que la face déclive et se termine par deux épines triangulaires trés pointues, fines,

beaucoup plus longues que larges. Le thorax n’est nullement bordé, sauf la face déclive ;

mais celle-ci ne l’est que d'une trés petite aréte mousse, non translucide et sans trace de

matiéres spongieuses. Premier noeud conique-arrondi, avec un pétiole antérieur plus long

que lui et des masses spongieuses seulement dessous, pas derriére. Second nceud en ovale

transversal, deux fois plus large que long et que le ler, avec les masses spongieuses

dessous, de cdté et derriére.

Téte mate, densément péticulée-ponctuée. Thorax et pétiole du ler neeud

subopaques, en partie ridés en long, en partie réticulés. Le reste lisse. Sur le corps

quelques rares soies dressées assez longues et faiblement clavées. Une rangée de poils

obliques, courbés, & peine subclavés aux scapes devant et au bord interne des mandibules.

La téte et les pattes n’ont que des poils subadjacents et faiblement clavés, jaundtres, assez

espacés.

Dun jaune testacé légerement roussitre ; dessus de abdomen d’un jaune brunatre

ou d’un brun jaunatre.

Seychelles : Silhouette, Mare aux Cochons, vers 1000 pieds.

7. *Triglyphothria striatidens Emery, var. felix nov. %. Pilosité un peu moins

dense et moins polyfide que chez le type de l’espéce. Premier nceud un peu plus tronqué

devant. Du reste identique.

Seychelles: Félicité ; Silhouette, Mare aux Cochons. Evidemment importée. Cette

espéce hindoue tend de plus en plus & devenir cosmopolite.

8. * Tetramorium blochmanni Forel, subsp. montanum Forel. Forme malgache.

Aldabra (Fryer).

9. Atopomyrmesx scotti, nov. sp.

3. L. 5,7 mill. environ. Voisin de steinheili Forel de Madagascar, dont il différe

comme suit: Téte droite derritre, avec les angles occipitaux dentiformes, continués e

arriére et en dessous de la téte par une aréte plus forte. Yeux plus convexes, 13 stries

environ au lieu de 18 entre les arétes frontales qui sont plus rapprochées. Scape lis

(strié chez steinheilz). Articles du funicule un peu plus gréles. Dos du pronotum large

déprimé concave derriére de droite 4 gauche, bordé devant et de cdté d’une aréte vive

mais non translucide, échanerée largement au milieu du bord antérieur, formant un angle

FOREL—FOURMIS DES SEYCHELLES ET DES ALDABRAS 161

antérieur vif, subdentiforme ; latéralement l’aréte est subhorizontale, un peu lamelliforme,

mais opaque; le bord postérieur est en are concave. Suture promésonotale marquée.

Mésonotum assez déprimé et subbordé. Epinotum étroit, sans trace de bord, ni de dents,

avec la basale convexe et la face déclive concave de profil; les deux faces de méme

longueur, passant de l’une d l'autre par une courbe. Premier article du pédicule trés long,

presque aussi long que le thorax, cylindrique, portant en dessus, 4 son tiers postérieur, en

guise de nceud une trés haute écaille mince et tranchante, subrectangulaire, échanerée au

sommet comme chez la Formica easecta. Second noeud légerement plus large que long,

vu de cété cunéiforme, avec un sommet rétréci et presque tranchant (chez le steinheili le

ler noeud est bien moins long et a une écaille bicorne bien moins haute ; le 2me nceud est

large et arrondi en haut; puis le pronotum est tout autre et l’épinotum a deux petites

dents). Pattes plus longues et cuisses moins renflées.

Luisant.. Régulitrement et grossiérement strié en long, avec des cétés élevées entre

les stries. Les stries des cdtés de la téte tombent par un angle sur les stries divergentes

de locciput. Stries du dos du pronotum concaves en dehors. Dos du mésonotum presque

lisse (stries superficielles). Face déclive de I’épinotum, ler article du pédicule (sauf le

derriétre de I’écaille en bas) et pattes lisses. Abdomen mat, densément et finement

réticulé-ponctué. Dos du thorax et du ler article du pédicule presque sans poils. Tout

le reste du corps et les membres assez abondamment hérissés de soies raides, obtuses,

plutét courtes, d’un jaune brillant.

Noir; pattes brun foncé; antennes brun roussftre. Extrémité des tarses et des

mandibules ainsi que les articulations roussatres.

$(?). L. 5,446 mill. Mandibules armées de 6 4 7 dents, mates, densément ridées.

Téte plus large que longue, 4 bord postérieur faiblement convexe. Epistome caréné,

avancé devant en are. Les yeux énormes, en haricots, occupent presque tout le cdté de

la téte. Scape 24 fois plus long qu’épais, long comme le 2me article du funicule; le ler

est aussi épais que long. Thorax bien plus étroit que la téte. Une légtre échancrure

entre le pronotum et le mésonotum ; celui-ci étroit, bordé latéralement derriére. Le

seutellum est obtusément bidenté ou bituberculé en lieu et place des deux longs appendices

quil porte chez l'alluaudi Emery. Epinotum simplement convexe. Premier article du

pédicule trés long et cylindrique, long comme } ou les 3 du thorax environ, mais sans

trace de neud ni d’écaille. Second nceud rectangulaire, rétréci devant, un peu plus

long que large. Abdomen allongé. Ailes avec une cellule discoidale et une cubitale, la

nervure transverse s’unissant 4 la nervure cubitale 4 son point de partage.

Corps plutdt mat, irrégulitrement ridé—rugueux en long. Peédicule lisse avec

quelques rides longitudinales. Abdomen finement réticulé et subopaque. Pilosité plus

fine et plus pointue que chez l’ouvritre, oblique sur les membres, répandue aussi sur le

thorax et le ler article du pédicule, mais moins abondante. L’occiput et les cdtés du

thorax ont de grosses cdtes et stries regulires, comme chez l'ouvrivre.

D’un noir brundtre; abdomen et pattes d’un brun roussdtre. Antennes et mandibules

roussitres. Ailes brunes avec les nervures brunes aussi.

Seychelles: l’ouvriére provient de Praslin et le ¢ de Silhouette, du plateau de la

Mare aux Cochons (1000 pieds), 4 la forét (2000 pieds). Ils ont done été pris séparément,

21—2

162 PERCY SLADEN TRUST EXPEDITION

les ¢ venant voler & la lumiére dans les montagnes de Silhouette. Néanmoins la

convergence est telle et l’analogie avec le f de |’A. alluaudi si grande que je suis & peu

pres certain de lidentité spécifique entre le ¢ et la 8.

Cette espéce est trés caractéristique par la forme du pronotum, des angles occipitaux

et du ler article du pédicule ; la forme du 2me article la distingue aussi de steinhedl et

de foreli Em.

10. Vollenhovia levithorax Emery, subsp. alluaudi Emery.

? minor et major, . Emery n’a décrit que la petite ? (1. 3,5 & 3,8 mill.).

8 major. L. 5,7 mill. Fossette antennaire comme chez la §. Premier nceud plus

cubique, plus verticalement tronqué devant et derriére que chez la petite 8, avec un bord

postérieur supérieur aigu, un peu relevé. Ponctuation de la téte plus serrée, parfois

presque confluente ; stries ou rides plus grossiéres et plus abondantes. Du reste identique

4 la petite 8, mais un peu plus robuste.

?. L.6,747 mill. Téte élargie derriére, un peu plus longue que large. Pronotum 4

épaules subanguleuses. La fossette antennaire se prolonge latéralement jusqu’au bord

de la téte derriére |’épistome par une impression transversale un peu courbée (ce caractére

est aussi visible chez la grande ¥, & peine marqué chez la petite). Premier nceud comme

chez la grande 8, mais son bord postérieur, fortement relevé, fait, vu de profil, l’effet d’une

dent. Sculpture de la téte et du thorax plus forte que chez la grande ¥ ; les fossettes

allongées, souvent confluentes, sont partout entremélées de rides longitudinales qui

divergent sur l’occiput. Abdomen lisse, & ponctuation fine et éparse (plus grossiére sur le

2me noeud), Ailes avec une cellule cubitale. La nervure transverse s’unit au rameau

cubital externe loin du point de partage. Une cellule discoidale. Cellule radiale

ouverte.

D'un brun assez foncé. Antennes, mandibules, épistome, joues et en partie les pattes

rougedtres. Ailes d’un brun assez foneé, & nervures brunes. Pilosité comme chez la

grande et la petite ¥.

Seychelles : Silhouette, Mare aux Cochons, au dessus de 1000 pieds, nid dans les

troncs d’arbres, en Septembre (MM. Scott et Stanley Gardiner). |

11. Vollenhovia piroske, nov. sp.

%. L. 2,2 4 2,4 mill. Rassemble & subtilis Em. de Key, mais d’un brun noir ou

d’un noir brunatre, avec les membres et les mandibules d’un brun roussAtre. Mandibules

lisses, ponctuées, armées d’environ 6 (ou 7) dents. La portion postérieure de 1’épistome

insérée entre les arétes frontales est un peu plus étroite, en tout cas pas plus large que

celles-ci (un peu plus large chez subtilis). Le scape atteint le quart postérieur de la téte.

Articles 2 4 8 du funicule plus de 3 fois plus épais que longs (moins de 3 fois, un peu plus

de 2 fois chez subtilis). Téte et thorax encore plus aplatis que chez subtilis, Téte

rectangulaire, d’un bon quart plus longue que large, 4 peine plus large derriére que devant

(plus courte et un peu plus large derriére chez subtilis). Thorax plus étroit que chez

subtilis ; la suture promésonotale fait absolument défaut. Face basale de l’épinotum trés

distinctement plus longue que large, beaucoup plus longue que la face déclive qui est trés

courte et oblique (aussi large que longue, et seulement un peu plus longue que la

FOREL—FOURMIS DES SEYCHELLES ET DES ALDABRAS 163

déclive chez subtilis). Dos du thorax trés plat. Premier nceud un peu plus long que

large; verticalement tronqué devant (bien plus nettement que chez subtilis). Second

noeud plus large, un peu plus large que long (4 peine aussi large que long chez subtilis).

Cuisses renflées, comme chez subtilis.

Mate, densément ponctuée et striée ou ridée en long (y compris l’épinotum qui est

lisse chez la subtilis); abdomen et noeuds lisses, finement et éparsément ponctués ainsi

que les membres. Assez abondamment pubescente (pubescence jaunatre). Pilosité

dressée courte et tres éparse (un peu plus abondante sur l'abdomen). Membres avec des

poils courts et obliques.

Couleur (voir au début).

g. L. 2,0 mill. Téte rectangulaire, plus longue que large, rétrécie devant les yeux

qui sont situés au tiers antérieur et médiocres; son bord postérieur concave; occiput

déprimé. Mandibules étroites, bidentées. Epistome convexe. Antennes de 13 articles ;

seapes deux fois plus long qu’épais. Articles 2 & 4 du funicule courts, aussi épais que

longs ou & peu prés. Thorax déprimé, large devant, rétréci derriére. Face basale de

lépmotum trés déprimée, plus longue que large, rectangulaire ; face déclive trés courte,

abrupte, subverticale. Nceuds arrondis, le premier non tronqué devant, du reste comme

chez l’ouvritre.

Sculpture comme chez l’ouvriére, mais plus fine; mésonotum en partie luisant ;

téte et épinotum mats. Pubescence, pilosité et couleur comme chez l’ouvriére. Ailes

pubescentes, subhyalines ou un peu teintées de roussitre, avec les nervures atrophiées, les

supérieures avec une rangée de longs poils derriére.

Seychelles : Silhouette, Pointe Etienne, contrée basse, pres de la céte, 17 Septembre,

1908.

Trés voisine de subtilis Em., mais suffisamment différente. Differe d’escherichi Forel

par sa couleur, sa forme plus étroite, ses nceeuds plus étroits, la forme de la téte, ete., de

banks For. par sa forme bien plus déprimée, aplatie et par ses mandibules plus larges.

12. Cardiocondyla emeryi Forel, ¢, ailé. Correspond bien 4 la description d’André,

mais les taches foncées de la téte et du thorax sont & peine brundatres.

Seychelles : Mahé, Anonyme Island.

Le ¢ de Madére récolté par M. Schmitz dans le temps est au contraire entitrement

d'un brun noiratre ; du reste identique.

13. *Cardiocondyla emeryi Forel (subsp. rasalame Forel?). 9. L. 2 mill. D’un

brun roussitre ou d’un roux brunitre plus foneé que chez l’ouvriére. Ailes hyalines.

Pattes d’un testacé clair. Téte, thorax et pédicule bien plus mats et plus fortement

seulptés que chez l’ouvriére; nceuds plus larges. Correspond du reste bien 4 l’ouvritre

de Madagascar.

Seychelles: Silhouette, 1500 pieds ; Mahé, 1000 pieds. Peut-étre est-ce simplement

une variété foncée de l'emeryi et pas la vraie rasalame.

14. Monomorium fossulatum Emery, subsp. sechellense Emery. 9. Seychelles :

Silhouette, Mare aux Cochons, 1000 pieds.

i IBRARY x

\ Oem i

164 PERCY SLADEN TRUST EXPEDITION

15. *Monomorium sp. ?% 9. Indéterminable sans l’ouvriére. Peut étre la 2? du

M. termitobium Forel? Seychelles: Félicité.

16. Solenopsis seychellensis Forel. 89.

g. L. 2,6 & 2,8 mill. Téte exactement comme chez l’ouvriére, mais légérement

plus courte (un peu plus longue que large), large comme le thorax. Mésonotum convexe,

dépassant & peine le pronotum. Epinotum avec deux tubercules trés allongés et peu

marqués ; ses deux faces de méme longueur, la basale déji fort inclinée en arriére.

Noeuds comme chez l’ouvriére.

D’un brun foneé; membres d’un jaune brundtre; cuisses d'un brun jaundtre. Ailes

manquent.

Du reste comme l’ouvriére.

Seychelles: Mahé et Silhouette, 1000 & 2000 pieds.

17. Cremastogaster gibba Emery. §. Seychelles: Mahé. Variété un peu foncée.

18. *Cremastogaster rasoherine Forel. 89%.

g. L. 5,5 45,8 mill. Ailes hyalines & nervures pales. Thorax plus étroit que la

téte. Epinotum convexe, inerme, 4 face basale courte. Premier nceud avec un pétiole

antérieur rétréci. I] est carré, mais arrondi derriére. Second nceud presque entier

derriére, trés faiblement impressionné. Entiérement lisse, méme les joues qui n’ont

quelques stries qu’d leur bord antérieur.

D’un jaune & peine roussatre, avec le tiers postérieur de l’abdomen brunatre.

Du reste comme l’ouvriere.

g. L.2mill. Téte arrondie, un peu plus large que longue. Mandibules bidentées.

Epinotum bas. D’un jaune pale; téte et abdomen d’un jaune brundtre ou d’un brun

jaunatre.

Une ergatogyne de 3,7 mill., & thorax renflé.

Seychelles : Silhouette, Pointe Etienne et Mare aux Cochons; Mahé, de la mer &

1000 pieds.

Tout-a-fait semblable au type § de Madagascar.

19. Pheidole punctulata Mayr. 29%. Seychelles: Silhouette; Mahé ; Bird

Island (Fryer). Aldabra (Fryer).

20. *Sima rufonigra Jerdon. 9. Seychelles: Silhouette, contrée basse ‘running

on a stretch of bare granite between stretches of fern and scrub.” Cette espéce a été sans

aucun doute importée de |’Inde ot elle est trés commune.

21. Tapinoma melanocephalum Fabr. 8%. Seychelles: Silhouette, Mare aux

Cochons, 1000 pieds.

22. *Technomyrmex albipes Smith. 893. Seychelles: Silhouette, Mare aux

Cochons et Mont Pot-i-eau (1000 & 1500 pieds); Mahé, Anonyme Island, Cascade

Estate, ete.

23. Technomyrmesx albipes, subsp. foreli Emery. 829.

Seychelles: Silhouette, Mare aux Cochons, Pot-i-eau; Mahé, Long Island, ete.

FOREL—FOURMIS DES SEYCHELLES ET DES ALDABRAS .165

Parmi eux un monstre pseudandre comme celui que Mr Donisthorpe a trouvé aux serres

de Kew chez lalbipes typique.

Il est intéressant de trouver la sous-espéce malgache a cdté de l’espéce typique, dans

les mémes localités. S’agit-il d’une importation de l’espece typique ?

24. *Brachymyrmex patagonicus Mayr, subsp. cordemoyi Forel. $22.

g. A peu prés impossible & distinguer du patagonicus typique ; la téte est un peu

plus large derriére.

Seychelles : Mahé, Cascade Estate, div. localités ; Silhouette, Mare aux Cochons, ete.

Cette forme américaine était déja connue de la Réunion et des Comores ott elle a été

importée. Elle s’est done aussi introduite aux Seychelles.

25. Plagiolepis alluaudi Emery. §%. Seychelles : Silhouette, Mare aux Cochons ;

Félicité.

26. * Plagiolepis madecassa Forel. §%. Seychelles: Silhouette, terrains bas, et

are aux Cochons; Praslin; Mahé, Anonyme Island; Félicité.

M Cochons ;_ Prasl Mahé, A Island; Félicit

Déja trouvée & l’ile Desroches (Amirantes).

27. Prenolepis longicorms Latr. %. Aldabra (Fryer). Déja trouvée & Coetivy.

28. *Prenolepis stemheili Forel. %. Aldabra (Fryer). Evidemment importée des

Antilles.

29. Prenolepis bourbonica Forel. 92. Seychelles: Mahé, Cascade Estate,

Décembre et Janvier. Déja trouvée & la Réunion, & Coetivy, aux Chagos, & Cargados

Carajos.

30. Prenolepis mixta Forel. 822.

g. L. 4,8 45,2 mill. Téte élargie derriére, un peu plus large que longue, 4 cétés

assez convexes. Le scape dépasse l’occiput de plus des 2 de sa longueur. D’un brun

plutét clair, avec les mandibules et les membres d’un jaune sale ou un peu roussatre.

Ailes brunies (pas foncées). Quelques taches sur le thorax et le bord des segments

abdominaux plus ou moins jaundtres.

Du reste comme l’ouvriére.

Seychelles: Silhouette, la forét au dessus de 2000 pieds ; Mahé; Praslin, ete. Aotit

et Septembre (f et ?).

31. Camponotus maculatus Forel, subsp. fulvuws Emery, var. octonotata Forel. 892.

g. L. 8,5 4 8,7 mill. Téte fortement convexe derriére, sans rétrécissement spécial

a Tocciput. Entiétrement d'un jaune roussitre avec les mandibules et les membres jaunes

et d’étroites bandes transversales brunes distinctes sur l’abdomen, quoique moins frappantes

que chez la $. Ailes teintées de brun jaunditre. Subopaque ou mat.

Seychelles : Silhouette, des terrains bas jusqu’d 2000 pieds; Mahé; Praslin.

La $ a 12,5 4 18,5 mill.

32. Camponotus maculatus Forel, subsp. radame Forel, var. mixtella Forel. §29.

g L.7 mill. Téte trés distinctement et fortement rétrécie prés de l’occiput, sans

166 PERCY SLADEN TRUST EXPEDITION

former de cou proprement dit, mais en formant deux bords latéraux subparalléles tout-a-

fait en arritre. D’un brun roussatre. Thorax d’un roux brunatre. Membres jaunatres.

Ailes teintées de jaunatre.

?. L.12mill. Téte en rectangle trés allongé, 4 peine plus large derriére que devant.

Couleur de l’ouvriere.

Aldabra (Fryer). Chez cette forme l’ouvriére est plus grande que chez la subsp.

JSulvus (6,5 & 11,5 mill. ou presque 12 mill.), tandis que la ? et le ¢ sont plus petits.

33. Camponotus foramiosus Forel, subsp. grandidieri Forel.

8¢9. Seychelles: Silhouette, terrains bas, Pot-d-eau, 1500 pieds; Mahé, Cascade

Estate, 800 & 1000 pieds (Décembre, Janvier).

34. Camponotus foraminosus Forel, subsp. aldabrensis Forel. 893. Aldabra

(Fryer).

35. Camponotus foraminosus Forel, subsp. aldabrensis Forel, var. fryeri nov.

3. L. 6,5 & 8 mill. Thorax encore plus allongé et surtout plus convexe trans-

versalement, avec l’épinotum plus arrondi que chez le type de la sous-espéce. Téte a

cétés encore plus convexes; les fossettes plus espacées et plus fines, surtout derrieére.

Téte plus ou moins rougeatre devant. Du reste comme l’a/dabrensis typique.

Aldabra (Fryer).

36. Camponotus thomasseti, nov. sp.

§. L. 4 mill. Téte carrée, légerement plus longue que large, 4 cdtés convexes, &

bord postérieur droit ou & peine concave. Yeux en arritre, vers le 3me cinquiéme.

Mandibules épaisses, probablement armées de 5 ou 6 dents. Epistome biéchancré devant,

arqué en entier au milieu du bord antérieur, sans caréne, assez plat, plus large que long.

Les cétés divergent faiblement d’arritre en avant et sont méme un peu convexes

(convergent de nouveau devant), de sorte que la portion latérale est un grande partie

cachée sous les joues. Aire frontale en rhombe transversal. Arétes frontales trés

divergentes, un peu plus éloignées derriére l'une de l'autre que des cétés de la téte. Le

scape dépasse le bord occipital de son épaisseur. Dos du thorax subdéprimé et subbordeé ;

sutures trés fortement imprimées ; un étroit métanotum transversal au fond de la suture

mésoépinotale. Pronotum plus large que long; mésonotum aussi. Face basale de

Pépinotum rectangulaire, d’un quart plus longue que large, presque plate, plus obtusément

subbordée derriére que latéralement. Face déclive concave, plus courte que la face

basale, verticale en haut. Ecaille épaisse, large, basse, inclinée en avant, aussi épaisse au

sommet, qui est transversal, obtus et rectiligne qu’en bas. Cuisses assez déprimées et

dilatées au milieu.

Luisant et chagriné; abdomen transversalement ridé; thorax réticulé ainsi que le

devant de la téte. Ponctuation éparse trés effacée, un peu plus nette sur la téte.

Quelques fossettes sur l’épistome. Pilosité trés éparse, un peu plus répandue sur

Yabdomen ; tibias, joues et scapes sans poils dressés, seulement avec une pubescence

diluée et adjacente ; celle-ci presque nulle sur le corps.

FOREL—FOURMIS DES SEYCHELLES ET DES ALDABRAS 167

D’un brun rougedtre; abdomen brun, avec le bord des segments d’un jaune vif;

mandibules, antennes, tarses, devant de la téte et articulations roussdtres ou rougeatres.

C'est probablement une § media.

g. L. 3,8 mill. Téte convexe derriére, aussi large que longue; le scape la dépasse

d'un bon tiers. Dos du mésonotum un peu déprimé ; épinotum uniformément convexe.

Eeaille comme chez l’ouvriére. Sculpture et pilosité de louvritre. Brunatre ; abdomen

d'un brun foneé, & bord des segments jaunatre. ‘Tarses, scapes, articulations et extrémité

des mandibules jaunatres. Ailes teintes de jaune roussitre.

Voisin des C. greent Forel et wedda Forel de Ceylan. Habite probablement les

cavités végétales (tiges).

Seychelles: Mahé, Cascade Estate, vers 1000 pieds; Silhouette, forét pres de la

Mare aux Cochons. Je dédie cette espece 4 M. H. P. Thomasset.

SECOND SERIES—ZOOLOGY, VOL. XV.

No. XII.—HYMENOPTERA, ICHNEUMONIDA.

By CriaupE Mortey, F.E.S., F.Z.S., etc.

(CommuNicaTED BY Pror. J. STANLEY Garpiner, M.A,, F.R.S., F.L.S.)

(Read Ist February 1912.) .

Subfamily Cryptine.

Hemireves Gravenhorst, Ichn. Europ. ii (1829), 781.

1. Hemiteles cingulatorius, sp. n.

A black and testaceous species, with the abdominal segments pale-banded. Head

black with the eyes large, but hardly prominent; vertex deplanate, closely punctate and

dull; frons with a central nitidulous line, and apically impressed on either side above the

scrobes ; face dull, subtransverse and in ? narrowly rufescent below antennz, in f entirely

with mouth and cheeks stramineous ; clypeus convex, strongly discreted with its apex

truncate and subbituberculate, of 9 rufescent throughout; mandibles broad and except

apically testaceous, equally bidentate and closely punctate; palpi whitish. Antenne

filiform, basally subattenuate, black throughout with the scape testaceous beneath and in

? the centre more or less broadly white-banded; three basal flagellar joints strongly

elongate, and in ? apically subnodulose with the fourth much shorter and apically white.

Thorax black and dull with apex of metathorax, in $ pronotum and in ? disc of mesonotum

rufescent ; whole pleurz and sternum, except a mesopleural mark, in ¢ testaceous and in

? rufescent ; metanotum, except basally, strongly and somewhat coarsely punctate with

the ill-defined areola subquadrate and parallel-sided and both basal and apical carinze

distinct, the latter with small and especially in ? acute apophyses; petiolar area deplanate

Scutellum strongly convex, nitidulous and in $, together with its whole

and entire.

Abdomen black with apices

region, rufescent and in f black with its region testaceous.

of three basal segments, and the ? anus, stramineous-white ; basal segment nearly thrice

longer than apically broad, but slightly explanate throughout, nitidulous with no

tubercles ; second and third of 2 explanate, shagreened, convex and the following more

nitidulous, of ¢ slender and subcylindrical ; terebra nearly half length of abdomen, apically

attenuate, with the ferrugineous spicula subarcuate at its apical third. Legs testaceous

and not stout with the posterior femora black or nigrescent above, and the hind tarsi

with their coxee discally and their basally constricted tibize entirely black. Wings not

ample, hyaline with very slightly infumate central and apical ¢ fascize ; all nervures strong

to apex ; outer nervure of the small areolet entirely wanting ; nervellus strongly postfurcal

and intercepted at its centre. Length, 34—5 mm. ?9.

170 - PERCY SLADEN TRUST EXPEDITION

This very distinct species, the only Cryptid yet found here, is certainly related to

a remarkable degree with /. cingulator Grav. (cf. Morl., Ichn. Brit. 11. 134), but differs,

beyond its profuse colouration, in many salient structural characters. According to

Schmiedeknecht’s table of palzearctic species, it is most closely allied to H. subannulatus,

Bridg. (Term. Fiiz. 1897, p. 128).

Twelve males and nine females were taken in Silhouette (low coconut-planted

country near the coast at Pointe Etienne, 17th Sept. 1908, etc.; Mare aux Cochons

marshy plateau and adjacent jungle, Aug. and Sept. 1908); and Praslin (Cétes d’Or

Estate, end of Nov. 1908).

Subfamily Pimpline.

EcutHromorpHa Holmgren, Eugen. Resa: Insect. (1868) 406.

2. Echthromorpha variegata (Brullé).

Pimpla variegata Brullé, Hist. Nat. Ins. iv. 91, 2. Polyamma continuum Kriechb.,

Berl. Ent. Zeit. xxxix. 1894, p. 304, g. . continua Krieg., Sitz. Nat. Ges. Leipzig, 1899,

p- 57, ¢. Kcehthromorpha rufo-maculata Cam., Trans. Linn. Soe. ser. 2, Zool., xii. 1907,

p. 79, ¢2. HE. variegata Krieg., Mitt. Zool. Mus. Berlin, 1909, p. 316, $9.

This species has not been taken in the Seychelles Islands since it was brought

forward under a new name by Cameron, upon the strength of a single pair, found by

Prof. J. Stanley Gardiner on Coetivy, which was not visited by the later expedition. The

female is entirely typical, but the male is paler than specimens I have seen from Nubia

and India. It occurs throughout tropical Africa and, though not so stated by Krieger, is

a common species in southern India.

3. Echthromorpha notulatoria (Fabr.).

Cryptus notulatorius Fabr., Piez. 77, 3. Ichneumon notulatorius Thunb., Mém.

Acad. Pétersb. 1822, p. 279, 1822, p. 362; Trentep., Isis, 1829, p. 849, 9. Pumpla

continua Brullé, Hist. Nat. Ins. iv. 92; Voll., Stett. Ent. Zeit. 1879, p. 149, 9

Chrysopimpla ornatipes Cam., Mem. Manchester Soc. 1899, p. 186; cf Spolia Zeylanica,

1905, p. 135, 29. Echthromorpha leva Cam., Journ. Str. Br. R. Asiatic Soe. 1903,

p. 135, ¢. E. latibalteata Cam., Trans. Linn. Soc. ser. 2, Zool., xii. 1907, p. 81, ¢.

It had struck me as strange, when writing my Fauna of India, that no one should

have noticed Chrysopimpla ornatipes before 1899; I am, consequently, delighted to find

that my friend Dr Krieger has been enabled to synonymise it with the above Fabrician

insect from Madras (cf: Mitt. Zool. Mus. Berlin, 1909, p. 311).

Chagos: our claim to it in these Islands lies in the single typical male (described as

new by Cameron), captured on 25th June, 1905, on Peros Banhos Atoll. In India it is

a common species extending from Ceylon to Assam; and, in the form /. leva Cam., which

I consider distinct, or Krieger’s var. insulana, it is found throughout the Malay Archipelago

to Batjan or Batchian, in the Moluccas.

MORLEY—HYMENOPTERA, ICHNEUMONID 171

4. Echthromorpha rufa, Cameron.

Echthromorpha rufa Cam., Trans. Linn. Soc. ser. 2, Zool., xii. 1907, p. 80, $9.

This large and distinct species appears most closely allied to E. (Stagnopimpla)

hyalina, Sauss. Grandid. Hist. Madagasc. xx. pl. 16, fig. 1, to which Cameron makes no

reference, according to Krieger’s description of both sexes (Mitt. Zool. Mus. Berlin, 1909,

p- 327), though the markings are far more uniform. It is certainly not Brullé’s Pimpla

macula, nor its variety vittata, found in Mauritius and Réunion, as indicated by Cameron.

I have seen the single typical pair, described from Mahé, where they were taken in

1906, and these are in every way co-specific with sixty examples captured during the

later expedition in Silhouette and Mahé. Those from the former island were secured in

the high forest near Mont Pot-i-Eau, mostly at about 1500 feet, in August 1908; they

were common on the marshy plateau of Mare aux Cochons at about a thousand feet during

that and the following month; and a female and several small males were taken in the

lower cultivated country in September 1908. On Mahé, it was noted on seven occasions

at Cascade Estate, between eight and fifteen hundred feet, during January and February,

1909 ; near Morne Blanc at about a thousand feet in November, 1908; and on the slopes

of Morne Seychellois between one and two thousand feet on the fourth of the following

February. It is the commonest and most conspicuous Ichneumonid of the Seychelles

Islands.

XANTHOPIMPLA Saussure, Grandid. Hist. Madagasc. 1892, xx. Pl. xiii.

5. Xanthopimpla eous, sp. n.

A distinctly red, and not flavescent, species with no black markings and the

metanotum glabrous throughout. Head with the eyes and ocellar region alone black.

Antennz about length of body, deep black with only underside of scape and pedicellus

rufescent. Thorax glabrous and strongly nitidulous with notauli deeply impressed though

not extending to disc, sternauli strong and entire; metanotum glabrous with no carine ;

only the lateral cost distinct, extending from near posterior radices to the hind cox ;

spiracles elongate and large; apophyses wanting. Abdomen immaculate and very finely

punctate with the transverse impressions on segments two to six crenulate ; terebra stout,

deep black, straight and hardly double length of the basally impressed first segment.

Legs unicolorous with the hind claws strongly curved and shorter than their black pulvilli.

Wings ample and evenly a little infumate throughout ; stigma, nervures and radius deep

black; basal nervure subcontinuous; areolet small, transverse-quadrate and distinctly

a little petiolate; nervellus strongly postfurcal and intercepted at its upper fourth.

Length, ¢ 10—12, ¢ 5—8 mm.

The deep black antennze and nervures contrast conspicuously with the uniformly pale

body. It is related in its deficient metanotal sculpture to X. tagris, Krieger (Sitz. Nat.

Ges. Leipzig, 1899, p. 75), but in all other respects almost exactly resembles my Indian

X. immaculata; it cannot, I think, be Holmgren’s Pimpla citrina (Eugen. Resa: Ins.

1868, p. 404), recorded from Mauritius. In the present collection it was mixed with

Echthromorpha rufa, to which it bears a strong superficial resemblance.

172 PERCY SLADEN TRUST EXPEDITION

Mahé ; I have examined four males and two females, mainly from near Morne Blanc at

an altitude of about a thousand feet, in October and November, 1908; but also from the

slopes of Morne Seychellois, at least five hundred feet higher, early in February, 1909.

Silhouette ; a single male of the minimum size was secured at Mare aux Cochons during

September, 1908.

Potyspuincta Gravenhorst, Ichn. Europ. iii (1829), 112.

6. Polysphincta bohemani, Holmgren.

Polysphincta bohemani Holmgr., Sv. Ak. Handl. 1860, n. 10, p. 30; Thomson, Opuse.

Ent. xii. 1253 et xix. 2128; Morl., Ichn. Brit. iii. 128, 39.

Var. tropicus, var. nov. I cannot consider this more than a form of Holmeren’s

species, with which it agrees in every particular except in having the rufescent colouration

replaced by testaceous, the mesonotal lobes subinfuscate and the disc less scabrous than in

the typical form.

It is interesting to find a female and two males of this palearctic species in the

Indian Ocean, though the genus is known to exist in peculiar forms in Ceylon. The

present individuals were doubtless introduced, with the Araneidea upon which the whole

genus has for long been known to prey; the examples I have examined were captured

upon the marshy plateaux at Mare aux Cochons and elsewhere on Silhouette in August,

1908, and at an altitude of over eight hundred feet at the Cascade Estate on Mahé about

four months later.

Subfamily Tryphonine.

OrTHOCENTRUS Gravenhorst, Ichn. Europ. ili (1829), 358; Thomson, Opuse. Ent.

mx 2AZS,

7. Orthocentrus protuberans, Holmgren.

Orthocentrus protuberans Holmgr., Sv. Ak. Handl. 1855, p. 333 - Thomson, Opuse.

Ent. xxii. 2429; cf. Roman, Nat. Unt. Sarek. iv. 352. O. insularis Ashm., Journ. Linn.

Soc. Zool. xxv. 1894, p. 142.

Var. deletus, var. nov. Agreeing in every way with the typical description of authors

(Morl. Ichn. Brit. iv. 62), except in having the basal nervure continuous through the

median, the metathoracic costulz entire, the sternum testaceous and the areolet entirely

wanting.

O. protuberans is usually regarded as a subarctic species, occurring in the northern

latitudes of America (whence Ashmead described the synonymous O. insularis in 1894),

Europe and Asia, extending to France and Austria. I can, however, discover nothing

but the above points of divergence between typical examples of this species in my

collection and four females, captured on Mahé and in Silhouette ; those from the latter

were obtained in the high forest above Mare aux Cochons on 2nd September, 1908, and

that from the former at the Cascade Estate during the following January, at an altitude

of some thousand feet.

MORLEY—HYMENOPTERA, ICHNEUMONID Ai 173

Subfamily Ophionine.

Henicospitus Stephens, Illus. Mand. vii (1835), 126.

8. Henicospilus longescutellatus, Kriechbaumer.

Ophion (Henicospilus) longescutellatus Kriechb., Berl. Ent. Zeit., xxxix. 1894, p. 308, ?.

O. anceps Tosq., Ichn. d’Afr. 1896, p. 392, g.

This species has hitherto been recorded only from western Africa, but no doubt can,

I think, be entertained that the following specimens entirely coincide with the above

descriptions, which I am sure are those of the sexes of a single species.

Five specimens were obtained of this insect on Mahé; first in the cultivated country

at the end of 1908, and early in 1909 both at the Cascade Estate, and in the high forest

behind Trois Fréres, all at an altitude of about a thousand feet. To the present species

also belongs the female recorded by Cameron (Trans. Linn. Soe. ser. 2, Zool., xi. 1907,

p. 79) from Trou aux Cerfs in Mauritius, where it was captured on 18th August, 1905,

under the tentative name of Ophion rufus, Brullé, which no one is now able to identify,

though it is certainly distinct from both O. rufus, Tosq. (=antarkarus Sauss., Grandid.

Hist. Madagasc.) and O. rufus, Kriechb.

9. Hencospilus antarkarus, Saussure.

Paniscus perforator Smith, Ann. Mag. Nat. Hist. ser. 4, xvii. 1876, p. 449, $ (?).

Enicospilus antarkarus Sauss., Grandid. Hist. Madagase. xx. 1892, fig. Ophion rufus

Tosq., Ichn. d’Afr. 1896, p. 378, ¢ (mec Brullé et Kriechb.).

Certainly the commonest African species of the genus; I have examined examples

from Natal, the Kentani district, Madagascar, Mauritius, etc. In the present collection

is a single female found on Assumption Island in 1909 by R. P. Dupont.

10. Henicospilus leconotus, Tosquinet.

Ophion (Enicospilus) leionotus Tosq., Ichn. d'Afrique, 1896, p. 393, .

I have examined a single female, which agrees to a remarkable extent with

Tosquinet’s description, though several divergent points are so striking that I hesitate to

entirely regard it as synonymous therewith: principally the radial nervure is sinuate

almost as strongly as in Szepligeti’s subgenus Dicamptus of Allocamptus Thoms., the

antenn are nigrescent and much longer than the body, and the corneous discoidal mark

is dull ferrugineous. I propose to term it var. /ongicornis, var. nov.

The example in question was captured on the marshy plateau of Mare aux Cochons,

on Silhouette, at an altitude of over a thousand feet on 27th August, 1908.

XANTHOCHAROPS, n. n.

Having the capital, pedal and thoracic structure of Charops, Holmgr. (Sv. Ak.

Handl. 1858, p. 39), though materially differing in its subclavate and pale-banded

flagellum, subdeplanate and shorter abdomen, and in the alar venation :—radial nervure

basally curved, emitted from basal third of the somewhat conspicuous stigma ; external

174 PERCY SLADEN TRUST EXPEDITION

cubital nervure broadly arcuate at apex of the wanting areolet ; intercubital nervure very

short; brachial cell short and broad; upper basal emitted from median some distance

before lower basal nervure ; neuration of hind wing very imperfect and apically entirely

wanting.

11. Xanthocharops primus, sp. n.

A pale flavous species with the eyes, ocelli, centre of occiput, antennze above except

at their apical third, three mesonotal vittz, a mesopleural line, base and extreme apex of

metathorax, scutellum, base of all the abdominal segments broadly and centre of first,

with lines on the hind legs, black. Face slightly prominent, the apically infuscate

mandibles weak with the lower tooth much the smaller. Flagellum pilose, apically

subelavate and brunneous, paler before the black apex. Thorax strongly and evenly

punctate ; metathorax very short and declived throughout, with only the strongly sinuate

basal transcarina traceable ; lateral costze distinct. Abdomen pilose and strongly nitidulous,

cylindrical and not compressed; anal styles slightly exserted. Legs not slender, hind

ealearia fully half length of metatarsus. Wings broad, hyaline, with stigma piceous and

all the nervures dark. Length, 54mm. ¢ only.

A remarkable insect of the flavescent Oriental type, such as Xanthopimpla,

Xanthexochus and Xanthocampoplex.

Mahé; the single male was captured near Morne Blane, in 1908.

Driocres Forster, Verh. pr. Rhein]. 1868, p. 153.

12. Duoctes vulgaris, Morl.

Dioctes vulgaris Morl., Fauna of British India, ined. (MS.)

A black species with the abdomen except basally, the scape beneath, mouth and all

the legs, red; the metathorax coarsely sculptured, grey-pilose, with distinct arez; the

basal segment parallel-sided with its apex nearly spherical and apically constricted; the

areolet obviously wanting and brachial cell subparallel-sided. Length, 6—7 mm.

It is hardly necessary to give a more detailed description of this distinct species,

which is instantly known by the brilliantly red scape, black-dotted above, and the peculiar

structure of the basal segment, since such will appear in my forthcoming volume of the

Fauna of India.

The connection between the fauna of these islands and the Oriental fauna, rather

than that of the Zanzibar Coast, is well illustrated in the capture of this Bengalese insect

in three of the Seychelles Islands. Mr Hugh Scott took half a dozen females on the

marshy plateau of Mare aux Cochons in August and September*, 1908, on Silhouette ; in

the Coco-de-Mer forest in the Vallée de Mai on the Cétes d’Or Estate at the end of the

latter month, on Praslin ; and at an altitude of between eight hundred and a thousand feet

at the Cascade Estate, on Mahé.

* A single 9 of the present, or an allied, Campoplegid genus was captured in Silhouette (Seychelles)

at the Mare aux Cochons during September, 1908. This is, however, in poor condition and I do not

feel justified in bringing forward a new species upon incomplete material in so difficult and obscure

a group of insects.—C. M.

MORLEY—HYMENOPTERA, ICHNEUMONID AD fa

TarytrA Cameron, Journ. Bombay Nat. Hist. Soc., 1907, p. 588.

13. Tarytia minuta, sp. n.

A pretty little red and black species, with the legs and orbits broadly pale. Head

bright pale flavous with only the occiput, ocellar region and sometimes centre of frons

black ; vertex not narrow, cheeks broad, mandibles subequal in length and apically

infuscate ; clypeus discreted and transverse, apically broadly rounded. Antenne longer

than head and thorax, black or nigrescent, hardly paler basally beneath, with the flagellar

joints elongate. Thorax dull and not very finely punctate, brick-red with dorsum of

metathorax, centre of mesonotum throughout and the scutellar region black ; notauli and

sternauli wanting, but the former represented by a flavidous line to dise on either side ;

metathorax declived throughout, with fine and determinate areze. Scutellum black.

Abdomen black and somewhat dull, with very fine sculpture; basal segment elongate,

nitidulous and apically subincrassate ; second rarely pale; venter entirely stramineous,

with the concolorous g valvule elongately exserted, and the deflexed black terebra

two-thirds length of abdomen. Legs very slender, pale testaceous, with the hind tibize

and tarsi subinfuscate. Wings small, broad and quite hyaline; stigma large, triangular

and pale testaceous; the discal nervures and especially basal abscissa of radius with the

single elongate intercubital nervure strong, remainder weak with the apical nervures and

basal part of median obsolete ; radial cell very short and apically reflexed ; nervures of

hind wing obsolete with the second recurrent, part of median and the subopposite

nervellus alone traceable. Length, 23—3 mm. 79.

Much smaller than the Indian species of this genus and rendered distinct by its

many obsolete nervures and peculiar coloration.

The typical female was captured at an altitude of between eight hundred and a

thousand feet at Cascade Estate in Mahé during January, 1909; but half a dozen

including both sexes had already been secured upon three occasions on the marshy

plateau and adjacent jungle at Mare aux Cochons in August and September, 1908, in

Silhouette. It is almost certainly one of the indigenous species, probably of an archaic

type. To the best of my knowledge the genus is confined to the Oriental Region.

Cremastus Gravenhorst, Ichn. Europ., i (1829), 730.

14. Cremastus punctus, sp. n.

A somewhat small black species with the legs and most of head rufescent, orbits

flavidous. Head transverse and dull, ferrugineous or badious with the orbits more broadly

internally, the face, clypeus and mouth, flavous; face somewhat coarsely punctate, dull

and centrally elevated, clypeus smoother and apically margined; upper tooth of the

apically nigrescent mandibles slightly the longer. Antenne slender, filiform and black

with the scape paler beneath ; basal flagellar joints elongate. Thorax subeylindrical and

black with the mesonotum piceous, pleurze and prothorax with extreme apex of metathorax

laterally ferrugineous ; mesonotum strongly and evenly punctate, very dull, with notauli

apically deep and extending shallowly to disc; metathorax finely scabriculous with

SECOND SERIES—ZOOLOGY, VOL. XV. 23

176 PERCY SLADEN TRUST EXPEDITION

complete areze; areola elongate, parallel-sided and apically truncate, emitting costul

before its centre; petiolar area deplanate, trans-strigose and distinctly discreted. Scutellum

black and finely punctate. Abdomen narrow and apically compressed, with the third

segment indefinitely badious laterally; basal segment nitidulous and subglabrous, laterally

margined and apically convex ; second nitidulous, very finely and longitudinally aciculate

throughout ; following pilose, with terebra two-thirds length of abdomen. Legs dull

testaceous with the anterior hardly paler basally; hind coxee, trochanters and tarsi slightly

nigrescent. Wings small and hyaline, with stigma piceous and radix testaceous ; basal

nervure continuous ; brachial cell apically rectangular below, with basal half of second

recurrent nervure nearly entirely fenestrate; nervellus antefurcal and subgeniculate,

though not intercepted, far below its centre. Length, 6 mm. # only.

This species is closely allied to C. schanobius Thomson, O. E. xiv, 1446 (= decoratus,

Holmer., nec Grav.) in its apically strong notauli, deeply punctate mesonotum and

rectangular discoidal cell.

Silhouette ; a single female was captured in September, 1908, at Mare aux Cochons.

PRISTOMERIDIA Ashmead, Proc. U. 8S. Nat. Mus., 1900, p. 100.

15. Pristomeridia ruficaput, sp. n.

A slender, black species with the under surface and legs, except apices of hind ones,

rufescent testaceous. Head dull, deplanate behind the internally parallel-sided eyes, and

rufescent with only the ocellar region and occiput black ; face subtransverse, dull and

centrally slightly prominent; mouth paler, with the discreted clypeus subcircular and

centrally tuberculate ; mandibles weak, with teeth of equal length and the upper the

larger. Antennz filiform and slender, two-thirds length of body and not apically

attenuate; black with the scape entirely testaceous, and the basal flagellar joints elongate.

Thorax slender and slightly shining with the sternum entirely, prothorax to tegule, both

meso- and meta-pleursee below, and a dot beneath hind tegule, rufescent ; mesonotum

shagreened, with notauli strong to near disc; metathorax somewhat smooth, with distinct

areze ; areola elongate and parallel-sided, basally constricted to the triangular basal area ;

costulze and lateral costze entire. Scutellum black, subconvex and not large. Abdomen

slender with three basal segments shagreened and the following compressed, second

narrowly testaceous apically; basal segment slender with the postpetiole a little explanate ;

g valvule exserted and testaceous; terebra fully two-thirds length of abdomen. Legs

subelongate, slender and testaceous with the hind tibize and tarsi entirely nigrescent ;

hind femoral tooth at its apical third and obliquely triangular, succeeded by a row of

minute serrations. Wings hyaline, neither narrow nor extending to anus; stigma

nigrescent and not broad; basal nervure continuous ; areolet wanting ; radix and tegule

testaceous ; nervellus neither arcuate nor intercepted. Length, 44—5 mm. $9.

I have little hesitation in placing this species in Ashmead’s genus, rather than in

Pristomerus Holmgr., since the hind femora are not at all incrassate and the nervellus is

obviously entire, though the hind femoral tooth is not near the apex and is succeeded by

distinct serrations. Our species is allied to P. marginicollis Cam. (Tids. v. Ent. 1907,

p. 110, ?) from Sikkim, but there can be no doubt respecting its specific distinctness.

MORLEY—HYMENOPTERA, ICHNEUMONID A UF

A single pair has reached me from the Isle of Mahé; the typical female was found in

the high forest of Morne Blane and Pilot, during November, 1908; and the male is from

the country above Port Glaud, at an altitude of between five hundred and a thousand feet,

on the 5th of the same month.

Dicotus Forster, Verh. pr. Rheinl., 1868, p. 171.

Head small; labrum not exserted ; clypeus convex and laterally compressed ; basal

flagellar joint longer than the second; flagellar joints of ¢ not emarginate ; metathorax

transimpressed before its central carina, of ? not apically truncate; terebra elongately

exserted ; hind coxze nitidulous and femora mutic, their tibize subincrassate and basally

distinctly constricted ; stigma broadly triangular and not small; areolet wanting ; median

nervure of hind wing not basally evanescent.

The Plectiscini have received so inadequate attention that it appears expedient to

shortly summarise the characters upon the strength of which I consider the following

species should be included in the present genus, which was employed by Prof. Thomson

as a subdivision of Megastylus Schiddte, though not so classed by its author in 1871.

I have heard of the description of no species outside Europe, and on that account alone

tentatively describe the following as new.

16. Dicolus equatorius, sp. n.

A small, nitidulous, black insect with the prothorax, legs except apically and centre

of abdomen, pale. Head glabrous, nitidulous and a little transverse, black with the

mouth and apex of the prominent clypeus testaceous ; ocelli and face at base of antennz

distinctly elevated ; face shining and evenly rounded throughout. Antenne black and

pilose, as long as the body, slender and apically attenuate, with the pale scape and the

flagellar joints elongate. Thorax strongly nitidulous and subglabrous; mesonotum

convex, with a strong central longitudinal impression ; prothorax rufescent ; mesopleurze

transimpressed below radices; metathorax small and hardly sculptured, but with the

lateral costee complete and a strong central transcarina ; apophyses small and subacute.

Scutellum smooth, black and convex. Abdomen black or nigrescent, with apex of second

and dise or whole of third segment indefinitely flavidous; basal segment convex and

linear, exactly parallel-sided, fully thrice longer than broad, discally subearinate and

basally concave ; following broader, not compressed, nitidulous and sparsely white-pilose ;

$ valvule not exserted ; terebra fully half length of abdomen, slightly reflexed, black and

pilose, with the spicula red and acuminate. Legs clear testaceous with all the tarsi, the

stout and pilose hind tibiz with base and apex of their femora, subnigrescent ; pulvilli

shorter than the slender, curved claws; calearia short and inconspicuous. Wings ample

and hyaline; stigma and tegule piceous, radix testaceous; radial and cubital nervures

evenly curved throughout, forming no areolet, and the latter continuous with the

bifenestrate second recurrent ; basal nervure continuous; nervellus entire, postfurcal and

not intercepted. Length, 3mm. ¢9.

Two males were found in the high country of Silhouette, near Mont Pot-i-eau, during

August, 1908 ; the remainder are from Mahé and comprise three males from the slopes of

23—2

178 PERCY SLADEN TRUST EXPEDITION

Morne Seychellois at 1500—2000 feet in February, 1909; from forest land on Cascade

Estate, near Mount Harrison, at 1700 feet, early in the following month; and from forest

above Cascade Estate in January, 1909, where also the typical female occurred in the

following month, at an altitude of between one and two thousand feet.

Purctiscus Gravenhorst, Ichn. Europ., ii (1829), 978; Thomson, O. E. xii, 1296.

Head with vertex distinctly transverse; cheeks not buccate; face parallel-sided,

glabrous and not apically constricted; clypeus convex and laterally compressed, trans- —

versely discreted; lateral metathoracic areze complete; basal abdominal segment elongately

petiolate ; areolet distinct and entire, not transverse.

These characters will serve to distinguish the present genus from all others of its

Tribe ; from Dicolus, the areolet renders it distinct.

17. Plectiscus oceanicus, sp. n.

A small, nitidulous, black insect with the prothorax, legs except apically and centre

of abdomen, pale; hind tibize centrally pale banded; areolet entire. Length, 3 mm.

? only.

So similar to the last-described species (Dicolus equatorius) as to need no detailed

description. Therefrom it differs only in its transverse vertex, deeply punctiform notauli

of the mesonotum which is not centrally impressed, the deplanate and coriaceous and

apically subexplanate basal segment, apically compressed abdomen, longer terebra which

is hardly shorter than the abdomen, basally stramineous anterior legs, immaculate

testaceous hind femora, centrally stramineous hind tibie, small and quadrate alar areolet,

and opposite nervellus.

Mahé: a single female was captured in the Mare aux Cochons district, at an altitude

of between one and two thousand feet, at the end of January, 1909.

THERSILOCHUS Holmgren, Sv. Ak. Handl., 1858, n. 8, p. 135.

18. Thersilochus evanescens, sp. n.

A small black species with the mouth, antenne basally beneath, and centre of

abdomen, pale. Head transverse and closely punctate, subbuccate behind the internally

parallel eyes ; face somewhat dull and white-pilose, transverse and centrally prominent ;

clypeus strongly discreted, strongly transverse, elevated with its apex glabrous and, like

the mouth, testaceous ; cheeks not short. Antennze somewhat short, hardly extending

beyond metathorax, stout and filiform, apically subclavate, with their pale bases broadly

separated and scrobes distinct. Thorax short, punctate and somewhat dull, black with

the mesopleure below radices, and the propleure, ferrugineous; notauli wanting ;

metathorax short and evenly punctate with a single lateral carina, from near the apex of

which the discal transcarina extends obliquely to centre of the small basal area. Scutellum

black. Abdomen pyriform, nitidulous, with the second and third segments indefinitely

testaceous apically, and the compressed anus rufescent ; basal segment smooth, elongate,

obsoletely punctulate with the postpetiole a third length of petiole and parallel-sided ;

MORLEY—HYMENOPTERA, ICHNEUMONIDA 179

terebra distinctly reflexed and hardly shorter than the body. Legs unicolorous pale

testaceous with claws minute; inner hind calear the longer. Wings short and broad,

hyaline with the radial cell trapeziform; stigma triangular and pale piceous; basal

nervure strongly postfurcal below median; nervures of hind wing apically, and the

median basally, wanting; nervellus strongly postfureal and not intercepted. Length, 3mm.

? only.

Allied to 7. minutus Bridgm., and smaller than the common palearctic T. moderator

Grav., so well known through its attacks on the heteromerous beetle, Orchesia micans,

Panz., in Boletz.

The habits of the present species appear similar, since the type, which alone I have

seen, bears Mr Scott’s label :—“ Bred, together with many Anobiid and other beetles,

from a fungus, found in damp jungle, about two thousand feet; Silhouette, 29th July,

1908.—H. 8.”

No. XIII—DIPTERA, SCIARID/.

Von Dr. GuNTHER ENDERLEIN, STETTIN.

(Tafel 9, Fig. 1—10.)

Hierzu ein Anhang (p. 192) von Prof. J. J. Krerrer.

(Tafel 9, Fig. 11—14).

(MiteeTeILtT von Pror. J. Stantey Garpiner, M.A., F.R.S., F.L.S.)

Gelesen den 1. Februar 1912.

Dik Sciaridenausbeute von Herrn Hugh Scott in Cambridge (England) enthalt 12

Sciariden-Species, die sich auf 5 Gattungen verteilen. 4 dieser Gattungen waren bisher

noch unbekannt und zwar Psectrosciara Kieft., Ceratiosciara Enderl., Amesicrium

Enderl., Scythropochroa Enderl.

Scrara Meig. 1803 (= Lycoria Meig. 1800).

1. Sciara rimiscutellata, nov. spec. (Tafel 9, Fig. 1, Fliigel 9).

$9. Kopf breit und ziemlich kurz, so breit wie der Thorax. Augenbriicke miissig

breit, bei beiden Geschlechtern gleich breit; in der Mitte besonders hinten etwas ausge-

schnitten. Scheitel poliert glatt, mit kurzer Pubescenz, beim $ ungefaihr doppelt so lang,

beim ? mehr als 3-mal so lang wie die Breite der Augenbriicke. Ocellenhécker sehr hoch ;

die hinteren Ocellen gross, Augenabstand 1 Ocellendurchmesser ; vorderer Ocellus ein

wenig kleiner, Augenabstand ca. $ Ocellendurchmesser. Fiihler missig diinn und schlank,

beim # etwas kriiftiger; 1. Fiihlerglied so lang wie breit, 2. Ghed ein wenig breiter als

lang; 1. Geisselglied 24-mal so lang wie breit, 2.—13. Geisselglied doppelt, 14. ca.

3-mal so lang wie breit, das 14. in der Endhilfte stark zugespitzt. Maxillarpalpus

miissig schlank.

Thorax hoch gewdélbt, fast so hoch wie lang. Brustkegel halb so hoch wie die

Mittelcoxe. Riickenschild poliert glatt, Pubescenz sehr spirlich, sehr kurz und anliegend.

Scutellum ziemlich gross, nicht ganz halbkreisformig, ziemlich stark abstehend, die

Oberseite ziemlich eben und mit einigen (ca. 4) ziemlich kriftigen Querriefen. Post-

scutellum poliert glatt, miissig lang, wenig geneigt und wenig gewélbt. Abdomen

beim ¢ kriftig, fast so dick wie der Thorax, von der Mitte ab allmiihlich zugespitzt ;

2. Cercalglied fast kreisrund. Abdomen des ¢ ziemlich schlank ; Zange kriiftig, so lang

wie die 3 letzten Segmente zusammen, 1. Glied miissig schlank oval, 2. Glied ein wenig

kiirzer und etwas diinner als das 1., in der Endhiilfte der Innenseite schriig abgestutzt und

hier mit kurzen Dérnchen besetzt. Abdominalpubescenz des ? ziemlich lang, dicht und

abstehend, auch auf der Zange, des 2 kurz und spiirlicher. Beine sehr schlank, Schienen

und Tarsen nur mit sehr kurzer Pubescenz. Fussbérstchen spiirlich und kurz. Hinter-

tibiensporne gleichlang, 1. Tarsenglied ca. 5—6-mal so lang.

182 PERCY SLADEN TRUST EXPEDITION

Fliigel kriiftig. Die Subcosta endet am Ende der Zelle R. 7 (von der Basalquerader

ab) ist nur eine Spur kiirzer als r,. 7, miindet kaum proximal oder ein wenig proximal

der Mediangabelung. Mediangabelstiel ist kaum linger als m,. Mediangabel miissig

breit, ziemlich parallel. Die Cubitalgabel ist am Ende 1# so breit wie die Mediangabel.

m, nahezu parallel zu vr, nur sehr wenig divergierend. Zelle F ziemlich schmal; der

Basalabschnitt von 77 steht senkrecht und ist 4+ der Radiomedialquerader. Zelle R,

ziemlich breit, in der Mitte verbreitert und im Basalteil ziemlich schmal. Die Costa

endet ungefiihr am Ende des 2. Drittels zwischen vr und m,. rr ist ein wenig mehr

als doppelt so lang wie 7,, etwas ausserhalb der Mitte flach gebogen. 7, ist fast 3-mal

so lang wie die Radiomedialquerader. Der Cubitalgabelstiel ist halb so lang wie die

Basalstrecke der Media. Analis und Axillaris enden in der Mitte, scharf ist aber nur eine

Strecke bis zum Ende des ersten Drittels. Randpubescenz kurz und dicht. Halteren

spindelformig, Stiel sehr diinn und ebenso lang.

Kopf beim ¢ dunkelrostbraun bis tief schwarz, Scheitel mit sehr starkem Glanz ;

beim ¢ briunlich rostgelb bis dunkeirostbraun. Augen schwarz. Ocellen gelblich.

Fiihler dunkelbraun, die beiden Basalglieder rostgelb. Riickenschild tief schwarz mit _

starkem Glanz; Scutellum, Postscutellum und der iibrige Thorax ziemlich hell rostgelb.

Abdomen dunkelbraun, beim ? unten ziemlich hell; 1. Zangenglied hell rostgelb,

2. gelblich braun, die Dérnchen am hinteren Innenende schwarz, Abdominalspitze des

@ schwarzlich ; Pubescenz dunkelbraun. Beine mit den Coxen hell rostgelb, Schienen

etwas dunkler, Schienenendsporne hell rostgelb. Tarsen schwarz. Fliigel hell graubraun,

Adern hellbraun, Costa und Radius braun. Membran des ¢ stark besonders blaugriin,

des ? besonders rotviolett irisierend. Halteren schwarzbraun, Stiel rostgelb.

Kérperlinge: 3 2,5—2,7 mm. ? 2,7/—4,2 mm.

Fliigelliinge: $ 2,7—2,8 mm. $ 3,5—4,4 mm.

’ Thorakallinge: 30,7 mm. ? 1—1Z mm.

Abdominalliinge: ¢ 2,1 mm. ¢ 2,1—3 mm.

Fiihlerliinge: $ ca. 1,8 mm. ¢ 2 mm.

Liinge des Hinterschenkels: $ 1,1 mm. ? 1,3 mm.

Linge der Hinterschiene: ¢1,4 mm. ? 1,6 mm.

Linge des Hintertarsus: 1,1 mm, ¢ 1,4 mm.

Vorkommen. Seychellen. Silhouette: Ebene von Mare aux Cochons, und Wald °

oberhalb, [X. 1908, 2 ¢, 2 2; in der Niihe von Mont Pot-a-eau, ungeftihr 1500 Fuss hoch,

VIII. 1908, 1 3, 1 9. Mahé: in der Nahe von Morne Blanc, X.—XI. 1908, 1 9;

Cascade Estate, 800—1500 Fuss hoch, 1908—9, 3 ¢, 5 @.

Typen im Museum von London, Stettin und Cambridge.

2. Sciara seychellensis, nov. spec. (Tafel 9, Fig. 2, Fliigel ?).

2. Kopf so breit wie der Thorax. Augenpubescenz relativ dicht. Augenbriicke

miissig breit, Scheitel miissig lang, matt. Fiihler etwas diinn und kurz, wenig zugespitzt.

Geisselglieder etwa 14-mal so lang wie dick, nur das Endglied ca. 24-mal so lang wie dick

und stark zugespitzt. Maxillarpalpus miissig schlank.

ENDERLEIN—DIPTERA, SCIARIDA 183

Thorax sehr hoch gewélbt, ungefihr so hoch wie lang; matt; Pubescenz miissig

dicht und miissig kurz. Scutellum hinten kreisformig gewélbt, oben etwas gewoélbt und

matt. Postscutellum ziemlich kurz, kaum abfallend aber ziemlich stark gewolbt.

Abdomen etwas diinner als der Thorax, Spitzendrittel allmiihlich zugespitzt ; Pubescenz

miissig dicht und miissig lang. Beine schlank ; Fussbérstchen spiirlich und kurz.

Fliigel miissig breit. Die Subcosta endet am Ende der Zelle R. 7 (von der

Basalquerader ab) ist 1} von 7r,. 7, miindet etwas proximal der Mediangabelung. Der

Mediangabelstiel ist kaum linger als m,. Mediangabel miissig breit, sehr schwach

divergierend. Die Cubitalgabel ist am Ende doppelt so breit wie die Mediangabel.

m, ist parallel zu rr. Zelle FR ist sehr breit ; der Basalabschnitt von 77 ist etwas schriig,

und ca. 4 von der Radiomedialquerader. Zelle PR, breit und fast gleichbreit ; Basal-

drittel etwas schmiiler. Die Costa endet etwas unter dem Ende des 2. Drittels

zwischen vr und m,. rv ist 27-mal so lang wie 7,, im dritten Viertel schwach und

gleichmissig gebogen. 7, ist 14-mal so lang wie die Radiomedialquerader. Der

Cubitalstiel ist #-mal so lang wie die Basalstrecke der Media. Die Analis endet in der

Mitte, die Axillaris am Ende des ersten Drittels. Randpubescenz miissig kurz und dicht.

Haltere spindelformig, Stiel diinn und ebenso lang.

Kéorper einfarbig sehr dunkel braun, Fiihler braun, die beiden Basalglieder etwas

heller. Maxillarpalpus braun. Beine dunkelbraun, Tarsen schwarz, Schenkel wenig

blasser, Vorderschienen etwas heller. Vorderschenkel braungelb. Tibienendsporne

gelblich. Fliigel ziemlich dunkel russbraun, Adern braun, Costa und Radius schwarz-

braun. Membran miissig stark, besonders griin bis rot irisierend. Halteren sehr dunkel

braun, Stiel dunkel gelbbraun.

Korperlinge : 2,6—3 mm.

Fliigellinge : 3—3,3 mm.

Fiihlerlinge : 1,1—1,2 mm.

Liinge des Hinterschenkels: 1,4 mm.

Liinge der Hinterschiene: 1,6 mm. bei einem grésseren Exemplar.

Lange des Hintertarsus: 1,4 mm.

Vorkommen. Seychellen. Mahé: Sumpfiges Terrain an der Kiiste bei Anse aux

Pins und Anse Royale, I. 1909, 1 9; in der Nahe von Morne Blane, ungefiihr 1000 Fuss,

II. 1909, 1 2; Cascade Estate, 800—1500 Fuss, 1908—9, 15 $; sumpfiges Terrain in der

Nihe der See-Ebene, Cascade, IT. 1909, 1 9.

Typen in Museum von London, Stettin und Cambridge.

3. Sciara albicoxa, nov. spec. (Tafel 9, Fig. 3, Fliigel 2).

42. Kopf so breit wie der Thorax. Augenbriicke miissig breit, die beiden Halften

stumpfwinklig nach vorn convergierend. Scheitel ziemlich kurz, doppelt so lang wie die

_ Breite der Augenbriicke. Ocellen ziemlich gross, der vordere etwas kleiner, in einem

flachen Dreiecke angeordnet ; Abstand der hinteren vom Augenrande ca. + Ocellen-

durchmesser. Fiihler kurz und ziemlich diinn, bei beiden Geschlechtern gleichmiissig

diinn, nur ist die Endhiilfte beim ¢ stirker zugespitzt ; 1. Geisselglied doppelt so lang wie

SECOND SERIES—ZOOLOGY, VOL. XV. 24

184 PERCY SLADEN TRUST EXPEDITION

dick, 2.—13. Glied 14-mal so lang wie dick, das 14. ca. 24-mal so lang wie dick, stark

zugespitzt. Maxillarpalpus massig schlank.

Thorax hoch gewélbt, so hoch wie lang. Riickenschild matt, mit nur sehr wenigem

ganz schwachen Glanz; Pubescenz spirlich und kurz, besonders beim g. Parapsiden-

furchen scharf. Scutellum missig kurz, abstehend, gerundet, meistens mit einzelnen

abstehenden Haaren. Postscutellum wie das Riickenschild mit schwachem Glanz, miassig

kurz, wenig abfallend und miissig stark gewélbt. Abdomen des ? ein wenig diinner als

der Thorax, wenig zugespitzt, erst das Enddrittel sehr stark zugespitzt. Cerci schlank,

Endglied schlank oval. Zange des $ schlank und diinn ; so lang wie der dritte Teil der

Abdominalliinge (ausser der Zange). Abdominalpubescenz sehr dicht, miissig lang und

struppig (besonders beim ?). Beine schlank, Pubescenz sehr kurz; Fussbérstchen

spirlich und sehr kurz.

Fliigel miissig breit. Die Subcosta endet am Ende der Zelle R, ist aber nur im

Basalviertel scharf. 7 (von der Basalquerader ab) ist genau so lang wie 7,. 7, miindet -

etwas proximal der Mediangabelung. Mediangabelstiel ist 14 von m,. Mediangabel

miissig breit, parallel, und sehr schwach nach hinten zu gebogen. Die Cubitalgabel ist

am Ende 24-mal so breit wie die Mediangabel. m, von der Mitte ab sehr schwach, mit rr

divergierend. Zelle #& ist auffallig breit ; der Basalabschnitt von 77 steht wenig schrig

und ist ungefiihr } der Radiomedialquerader. Zelle A, ungewéhnlich breit, und fast

gleichbreit, Basalteil etwas schmiiler. rr etwas ausserhalb der Mitte flach gebogen und

kurz am Ende eine Spur nach vorn gebogen, und 24-mal so lang wie 7, Die Costa endet

am Ende des 2. Drittels zwischen rr und m,. 7, ist 24 der Radiomedialquerader. Der

Cubitalgabelstiel ist # des Basalabschnitts der Media. Analis endet in der Mitte, Axillaris

am Ende des ersten Drittels. Randpubescenz dicht. Halteren spindelférmig, Stiel

ebenso lang.

Kopf und Thorax schwarz, Abdomen dunkel rotbraun bis schwarzbraun. Schulter-

ecken und ein kurzer Saum die Parapsidenfurchen hinauf hell briunlich gelb. Filer

schwarzbraun, die beiden Basalglieder hell briiunlich gelb. Maxillarpalpus dunkel

gelbbraun. Beide schwarzbraun, Tarsen schwarz, Vorderschenkel hell briiunlich gelb,

Trochanter schwarzbraun. Coxen schmutzig weisslich. Fliigel hell braun. Adern

braun, Costa und Radius dunkelbraun. Membran beim ¢ miissig stark in allen Farben,

beim @ stark besonders rot bis blauviolett irisierend. Halteren schwarzbraun, Stiel

gelbbraun.

Korperliinge: ¢ 1,8—2,5 mm. ¢ 2,5—3 mm.

Fliigellinge: ¢ 2,1—2,7 mm. ? 2,8—38,2 mm.

Fihlerlinge: ¢ 1—1,2 mm. ? 1—1,2 mm.

Linge des Hinterschenkels: $ 14mm. ¢ 1,4 mm.

Lange der Hinterschiene: $1,7 mm. ¢ 1,8 mm.

Linge des Hintertarsus: ¢1,4 mm. ¢ 1,5 mm.

Vorkommen. Seychellen. Mahé: Cascade Estate, 800—1500 Fuss, 1908—9, 14 @,

26 2; Gebiet von Mare aux Cochons, ungefihr 1500 Fuss hoch, I.—II. 1909, 1 ¢;

Anonyme Insel, von Gras, Farnen, Biiumen, etc., und von Seetang (Algen), I. 1909, 2 2;

ENDERLEIN—DIPTERA, SCIARIDA 185

auf sumpfigem Terrain an der See-Ebene, Cascade, II. 1909, 1 2; diirre Waldvegetation

auf der Spitze des Berges Sebert, 1800 Fuss und hoher, I. 1909, 1 ¢; Sumpfgebiet

an der Kiiste bei Anse aux Pins und Anse Royale, I. 1909, 2 3, 5 9. Félicité Insel,

GUE TKO Te ek

Typen im Museum von London, Stettin und Cambridge.

4. Sciara biformata, nov. spec. (Tafel 9, Fig. 4, Fliigel ¢; Fig. 5, Fliigel 9).

dé. Kopf fast so breit wie der Thorax. Augenbriicke breit, in der Mitte ein wenig

eingeschniirt. Scheitel kurz, beim ¢ ca. 1$-mal so lang wie die Breite der Augenbriicke,

beim $ ungeftihr so lang wie diese oder wenig linger. Ocellen miissig gross, fast gleich

gross, der vordere beriihrt den Augenrand, die hinteren sind beim ¢ ca. 3 beim @ ca.

4 Ocellendurchmesser vom Augenrand entfernt. Fiihler miissig lang und diinn, beim @ lang,

Geisselglieder bei beiden Geschlechtern 3—4-mal so lang wie dick. Maxillarpalpus schlank.

Thorax sehr hoch gewélbt, etwas héher als lang. Riickenschild ziemlich matt, mit

sehr geringem Glanz; Pubescenz missig lang und spiirlich. Parapsidenfurchen ganz

undeutlich. Scutellum miissig gross, gleichmiissig gerundet, relativ kurz aber stark

tiberhingend, hinten mit eimigen Haaren, 2 davon ziemlich lang, Oberfliiche rauh

chagriniert, fast querrissig. Postscutellum missig lang, miissig steil abfallend, gewolbt.

Abdomen miissig diinn und schlank, beim ¢ sehr diinn. Das Basalglied der Zange des

$ ist sehr kriiftig, das Endglied kaum halb so dick und meist einwirts eingeschlagen.

Die Cerci des ? sind sehr klein und diinn, das Endglied fast kreisrund. Abdominal-

pubescenz miissig dicht und kurz, beim ¢ dichter. Beine schlank, Fussbérstchen kurz.

Fliigel miissig breit. Die Subcosta endet in der Mitte vor der Zelle , aber nur eine

kurze Basalstrecke ist scharf. 7, ist etwas kiirzer als 7 (von der Basalquerader ab).

r, miindet stark proximal der Mediangabelung. Mediangabelstiel ist so lang, beim ¢

wenig kiirzer als m,. Mediangabel miissig breit, schlank, gerade (ungebogen) und

parallel. m, ist nahezu parallel zu rr. Die Cubitalgabel ist am Ende doppelt so breit

oder fast doppelt so breit wie die Mediangabel. Zelle R ist schmal; der Basalabschnitt

von rr ist kurz (ungefiihr } der Radiomedialquerader) und steht meist nahezu senkrecht

zu den beiden Adern. Zelle , ist breit, der Basal ziemlich schmal. rr ist am Ende des

2. Drittels allmiihlich doch ziemlich kriiftig gebogen und ca, 3-mal so lang wie 7,. Die

Costa endet etwas iiber dem Ende des 2. Drittels zwischen rr und m,. 7, ist ca. 1 der

Radiomedianquerader. Der Cubitalstiel ist beim ? $~, beim # ca. 2 der Basalstrecke

(zuweilen auch etwas kiirzer) der Media. Analis und Axillaris verschwinden ungefiihr in

der Mitte. Randpubescenz dicht und miissig kurz. Halteren schlank spindelférmig, Stiel

sehr diinn und ebensolang.

Kopf schwarz, Fiihler giinzlich braunschwarz, Palpus gelbbraun. Augen schwarz.

Thorax dunkel gelblich braun, oben schwarz. Abdomen gelblich braun bis dunkelbraun,

erstes Zangenglied des ¢ dunkel gelbbraun. Schienen schwarzbraun, Tarsen schwarz,

Coxen und Schenkel hell braungelb. Fliigel blass briiunlich grau, Adern hell grau, Costa

und Radius grauschwarz. Membran mehr oder wenig irisierend, in der Basalhiilfte

besonders blau, im Rand besonders messinggelblich, dazwischen besonders rot. Halteren

braunschwarz, Stiel hell briiunlich gelb.

24—2

‘LIBRARY

186 PERCY SLADEN TRUST EXPEDITION

Korperlinge: ¢ 2,1—2,7 mm. ? 2,6—3,2 mm.

Fliigelliinge: $ 2,6—3,3 mm. $ 2,6—3,4 mm,

Fithlerliinge: $ ca. 2,5 mm. $ 1,5—1,9 mm.

Liinge des Hinterschenkels: $1,4 mm. $¢ 1,3 mm.

Linge der Hinterschiene: $1,8 mm. $ 1,7 mm.

Liinge des Hintertarsus: $1,7 mm. 9? 1,8 mm.

Vorkommen. Seychellen. Silhouette: Ebene von Mare aux Cochons und dichtes

Gebiisch in der Nihe davon, VIII. 1908, 1 4; Wald oberhalb von Mare aux Cochons,

IX. 1909, 2 2, 5 2; héchster Wald, iiber 2000 Fuss, VIII. 1908, 5 ¢. Mahé: Hochwald

von Morne Blanc und Pilot, X.—XI. 1908, 2 3, 2 ?; Wald von ziemlich ver-

kriippelten Capucin-Biiumen (Northea), Gipfel von ‘Montagne Anse Major,” ungefihr

2000 Fuss, II. 1909, 1 ¢, 7 $; Gebiet von Mare aux Cochons, ungefihr 1500 Fuss,

L0G 19o9, wl &

Typen im Museum von London, Stettin und Cambridge.

Diese Species zeichnet sich dadurch aus, dass die ? eine sehr langgestielte Cubital-

gabel, liingere Fiihler und liingere und schlankere Beine als die ¢ besitzen. Der

Cubitalgabelstiel des $ ist nahezu so lang wie die Basalstrecke der Media.

5. Sciara nigriceps, nov. spec. (Tafel 9, Fig. 6, Fliigel 2).

49. Kopf so breit wie der Thorax, beim g ein wenig breiter, quer rundlich und

miissig klein. Augenbriicke missig schmal, die beiden Hiilften nach vorn einen ganz

flachen Winkel bildend. Scheitel miissig lang, ca. 24- beim ¢ fast 3-mal so lang wie die

Breite der Augenbriicke. Ocellen miissig klein, ziemlich hoch stehend, der vordere

Ocellus kleiner, die hinteren stehen kaum 1 Ocellendurchmesser vom Augenrand ab, der

vordere ist stark geniihert. Fiihler lang, beim ¢ ziemlich diinn, beim ¢ etwas stiirker und

mit lingerer Pubescenz; die Geisselglieder 3—4-mal so lang wie dick, beim ¢ sind die

beiden ersten nur ca. 2-mal so lang wie dick. Maxillarpalpus ziemlich lang.

Thorax so hoch wie lang, aber der Kopf wenig abwiirts geriickt. Riickenschild

matt; Pubescenz nur auf 3 mittleren Liingsstreifen, kriiftig und miissig lang ; an den

Seitenlinien ausserdem eine lange, kriftige Behaarung. Scutellum lang, in der Mitte

kriiftiger gerundet wie an den Seiten; hinten behaart. Postscutellum miissig kurz, etwas

abfallend und gewolbt. Abdomen des ? lang, weniger hoch als der Thorax, aber ungefahr

so breit, die Seiten fast parallel und erst im Endfiinftel zugespitzt und in eine lange

Spitze ausgezogen; Cerci klein, Endglied fast kreisrund; Pubescenz lang, dicht und

etwas anliegend. Abdomen des ¢ kiirzer, sehr diinn, wenig zugespitzt, Zange sehr klein

und diinn, nicht linger als das letzte Abdominalsegment ; Pubescenz wie beim ¢. Beine

lang und schlank, Pubescenz fast verschwindend, Fussbérstchen miissig kurz.

Fliigel miissig breit. Die Subcosta endet in der Mitte vor der Zelle #, aber nur ein

kurzer Basalteil ist scharf. 7 (von der Basalquerader ab) ist so lang wie 7,. 7, miindet

etwas proximal der Mediangabelung, und ist 13 der Radiomedialquerader. Der Median-

gabelstiel ist ein wenig kiirzer als m,. Die Mediangabel ist schlank, gerade, parallel und

m, parallel zu rr. Die Cubitalgabel ist am Ende ungefiihr doppelt so breit wie die

Mediangabel. Zelle F& ist sehr schmal; der Basalabschnitt von v7 steht senkrecht zu

ENDERLEIN—DIPTERA, SCIARIDA 187

den beiden Asten, ist sehr kurz und ist ungefihr + der Radiomedianquerader. Zelle R,

breit, nach dem Ende zu etwas verschmilert, Basalteil sehr schmal. 77 ist im Verlauf

des 3. Viertels allmihlich gebogen und fast 3-mal so lang wie 7,. Die Costa endet

am Ende des 3. Fiinftels zwischen rr und m,. Der Cubitalgabelstiel ist nicht viel

kiirzer als der Basalabschnitt der Media. Die Mitte wird von der Analis erreicht, von

der Axillaris nicht erreicht. Haltere kriiftig spindelférmig, Stiel ziemlich dick.

Kopf und Augen schwarz. Fiihler dunkelbraun, Maxillarpalpus briiunlich. Thorax

hell rostgelb mit je einem schwiirzlichen Lingsstreifen seitlich der Mitte und je einem an

den Seiten des Riickenschildes; in der Mitte ist eine sehr feine Medianlinie. Abdomen

hell rostgelb, oben dunkler. Beine hell briiunlich gelb, Schienen etwas dunkler, Tarsen

dunkelgrau. Fliigel blassgrau, Adern hellbraun, Costa und Radius dunkelbraun.

Membran stark irisierend, Ausserrandzone griinlich gelb. Halteren briiunlich, Stiel

blass gelblich.

Kérperlinge: ¢ 2—2,5 mm. ? 2—2,9 mm.

Fliigellinge: ¢ 2,5—2,6 mm. ? 2,4—2,8 mm.

Fihlerlinge: ¢ca.1,9 mm. 2? ca. 1,8 mm.

Linge des Hinterschenkels: $ ca. 1,1 mm. ? 1,1 mm.

Linge der Hinterschiene: 31,5 mm. ? 1,4 mm.

Linge des Hintertarsus: 21,6 mm. ? 1,6 mm.

Vorkommen. Seychellen. Silhouette: in der Nihe von Mont Pot-i-eau, ungefihr

1500 Fuss hoch, VIII. 1908, 2 7, 1 9. Mahé: Gebiet von Mare aux Cochons, 1000 bis

2000 Fuss, I.—II. 1909, 1 2; Hochwald von Morne Blane und Pilot, X.—XI. 1908, 5 2;

in der Niihe von Morne Blanc, X.—XI. 1908, 6 3, 1 2; Wald von ziemlich verkriippelten

Capucin-Biumen (Northea), Gipfel von “Montagne Anse Major,” ungefiihr 2000 Fuss,

II. 1909, 8 3, 5; Cascade Estate, 800—1500 Fuss, 1908—9, 12 2, 6 2; Wald hinter

Trois Fréres, ungefiihr 2000 Fuss, I. 1909, 3 2, 2 9.

Typen im Museum von London, Stettin und Cambridge.

6. Sciara divergens, nov. spec. (Tafel 9, Fig. 7, Fliigel ?).

3. Kopf so breit wie der hintere, breitere Teil des Thorax, beim ¢ ein wenig

breiter; etwas quer. Augenbriicke schmal, Scheitel kurz. Fiihler ziemlich lang und

ziemlich dick, beim ? wesentlich diinner; die Geisselglieder beim ¢ ca. doppelt, beim

$ ca. 12-mal so lang wie breit. Maxillarpalpus schlank, das Endglied sehr lang.

Thorax sehr gewdélbt, etwas héher als lang; Brustkegel sehr hoch und ziemlich

schmal. Riickenschild wenig stark glatt, Pubescenz ziemlich spiirlich und_ lang.

Scutellum miissig lang, hinten gleichmiissig gerundet. Hinterrand ziemlich lang behaart,

im mittleren Teil mit 4 langen Haaren. Postscutellum missig lang, etwas abfallend und

gewolbt. Abdomen des ¢ miissig diinn, beim ? etwas dicker und allmiihlich zugespitzt ;

Cerci des ? nicht sehr klein, Endglied etwas lang oval; Pubescenz kriiftig und miissig

lang. Zange des $ sehr schlank und das Endglied sehr lang und diinn. Beine schlank,

Fussbérstchen miissig kurz.

Fliigel miissig breit, die Subcosta endet am Ende der Zelle 2, scharf ist aber nur

etwa die Hiilfte. 1 (von der Basalquerader ab) ist ein wenig liinger als 7,. 7, miindet

188 PERCY SLADEN TRUST EXPEDITION

stark proximal der Mediangabelung, und ist doppelt so lang wie die Radiomedialquerader.

Der Mediangabelstiel ist 14 von m,. Die Mediangabel ist etwas breit, stark nach hinten

gerichtet, parallel oder nur am Ende durch eine schwache Aufbiegung von m, wenig

verbreitert. Die zwei Enddrittel von m, sind stark mit 77 divergierend, wenn m, ganz

gerade ist dann noch etwas stiirker als in der Figur wiedergegeben. Die Cubitalgabel am

Ende ungefiihr 14-mal so breit wie die Mediangabel. Zelle A ist miissig schmal und

relativ kurz. Der Basalabschnitt von rr steht senkrecht zu den beiden Asten, ist miissig

kurz, und ist ungefiihr 4 der Radiomedianquerader. Zelle #, breit, Basalteil allmihlich

miissig stark verschmiilert. 7r ist ziemlich gerade, nur ein wenig ausserhalb des Endes

des 2. Drittels sehr schwach gebogen und fast 3-mal so lang wie 7,. Die Costa endet am

Ende des 2. Drittels zwischen rr und m,. Der Cubitalgabelstiel ist ? des Basalabschnittes

der Media. Die Mitte wird von der Analis etwas iiberschritten, von der Axillaris etwa

erreicht. Haltere schlank, spindelf6rmig, Stiel diinn und ebenso lang wie der Knopf.

Kopf und Augen schwarz, Fiihler und Palpus braunschwarz. Thorax etwas gliinzend

dunkelbraun. Beine braun, Vorderschenkel und alle Coxen blassbraun. Schienenendsporne

gelblich. Haltere schwarzbraun, Stiel gelblich. Fliigel blassbraun, Adern hellbraun,

Costa und Radius braun.

Korperliinge: ¢ 1,4—1,5 mm. ? 1,7—2,2 mm.

Fliigellinge: ¢1,8—1,9 mm. ? 2,2—2,5 mm.

Fiihlerlange: ¢ ca. 1,5 mm. ? ca. 1,2 mm.

Liinge des Hinterschenkels: 3 0,8 mm. @ 1,1 mm.

Linge der Hinterschiene: 21mm. 1,5 mm. bei einem grossen Exemplar.

Linge des Hintertarsus: 20,9 mm. 1,3 mm.

Vorkommen. Seychellen. Silhouette: in der Niihe von Mont Pot-d-eau, VIII.

1908, 1 2; Wald oberhalb von Mare aux Cochons, IX. 1908, 3 3, 29. Mahé: Hochwald

von Morne Blanc und Pilot, X.—XI. 1908, 2 2; in der Nahe von Morne Blanc, X.—XI.

1908, 1 2; Cascade Estate, 800—1500 Fuss, 1908—9, 10 3, 21 2; sumpfiges Terrain in

der Nihe der See-Ebene, Cascade, II. 1909, 1 9.

Typen in Museum von London, Stettin und Cambridge.

(11)*. Sciara mahensis Kieffer (Tafel 9, Fig. 8, Fliigel 9).

Von dieser Species liegen ausser 3 Typen foleende Exemplare vor :

Seychellen. Silhouette: Ebene von Mare aux Cochons und dichtes Gebiisch in

der Nihe, VIII. 1908, 1 2; Wald oberhalb von Mare aux Cochons, X. 1908, 1 3, 6 2;

in der Niihe von Mont Pot-d-eau, ungefiihr 1500 Fuss hoch, VIII. 1908, 2 ? (davon

1 Type). Mahé: Gebiet von Mare aux Cochons, 1000—2000 Fuss, I—II. 1909,

3 $; Cascade Estate, 800—1500 Fuss, 1908—9, 2 g, 18 ? (davon 2 Typen); Anonyme

Insel, von Gras, Farnen, Biumen, etc., I. 1909, 1 9.

(12)*. Sciara leucocera Kieffer (Tafel 9, Fig. 9 und 11, Fliigel J und Zangenglied).

Es liegen folgende Exemplare vor :

Seychellen. Mahé: Cascade Estate, 800—1500 Fuss, 1909, 6 g (davon 2 Typen).

* The numbers of this species and the next (11 and 12) refer to descriptions in the ‘‘ Anhang” by

J. J. Kieffer, p. 193.—H. Scorvr.

ENDERLEIN—DIPTERA, SCIARIDAi 189

ScyTHROPOCHROA, Enderl. 1911.

Enderlein, Arch. f. Naturg. 1911, 1. 3. Suppl. p. 138.

Typus: Scythropochroa latefurcata, Enderl. 1911. Seychellen.

Mediangabelstiel entspringt in der Mitte der Zelle R. Die Querader zwischen rr

und m mehrfach linger als der Basalabschnitt von rr. Mediangabel normal. Cubital-

gabelung distal von dem Insertionspunkt des Mediangabelstieles. Die beiden Cubitaliste

divergieren von der Gabelung ab sogleich stark bis sehr stark und laufen nicht erst eine

mehr oder weniger lange Strecke wenig divergierend neben einander wie bei Sczara.

Coxen sehr lang. Palpus ausser dem nicht sehr scharf von der Basis abgesetzten

Trochanter nur noch mit einem einzelnen grossen und kriiftigen Glied.

7. Scythropochroa latefurcata, Enderl. 1911.

?. Kopf miissig gross, so breit wie der Thorax. Scheitel kurz, ziemlich glatt. Die

hinteren Ocellen ziemlich gross, ihr Abstand von einander ungefihr gleich dem eigenen

Durchmesser; der vordere Ocellus etwas kleiner, eine Tangente am Vorderrand der

hinteren Ocellen schneidet den vorderen Ocellus in der Mitte. Augenbriicke miissig

schmal, in der Mitte vollig verschmolzen und ohne Einschniirung. Filer kurz, missig

diinn, kaum linger als } der Fliigelliinge ; die beiden Basalglieder so lang wie breit, die

Geisselglieder so lang wie breit, die der Spitzenhiilfte etwas linger. Pubescenz fein, missig

kurz und ziemlich dicht. Gesicht sehr schmal, ca. 24-mal so lang wie vorn breit, hinten

etwas verbreitert.

Thorax wenig gewélbt; Brustkegel breit und fast rechtwinklig, Spitze abgerundet.

Riickenschild glatt; Pubescenz sehr fein, an den Seiten lang und kraftig. Scutellum

kurz und breit, hinten gerundet, Behaarung ziemlich dicht und lang. Postscutellum

ziemlich lang, glatt, flach und wenig gewélbt. Abdomen lang, so dick wie der Thorax,

von der Mitte ab allmihlich zugespitzt. Legerohr sehr diinn und lang; 2. Cercalglied

langoval. Beine nicht lang aber ziemlich diinn. Coxen lang und schlank. Hintercoxen

etwas dicker und kiirzer. Schienenborsten oben sehr kurz und fein, in einer ziemlich

dichten Lingsreihe, bei der Mittelschiene sehr spiirlich, bei der Vorderschiene fast fehlend.

Fussborstchen kurz und spiirlich. 1. Hintertarsenglied ca. 3}-mal so lang wie der liingere

Hintertibiensporn.

Fliigel etwas schlank. Die Subcosta erreicht das Ende der Radialzelle R, das

Enddrittel ist aber sehr fein und undeutlich. 7, eine Spur linger als m,. Median-

gabelstiel 14 von m,, Mediangabel relativ kurz und breit, Cubitalgabel am Ende nur

14 so breit wie sie. Radiomedianquerader 4 des Mediangabelstieles und 3-mal so lang

wie der Basalabschnitt von 77. Zelle A, sehr schmal, Endhiilfte breiter, 7, in der Mitte

sehr schwach umgebogen. Die Randader erreicht fast das Ende des 4. Fiinftels der

Entfernung zwischen rr und m,. Die Cubitalgabelung hegt etwas distal von der Basis

des Mediangabelstieles. Randbehaarung miissig lang. Microtrichen sehr dicht und

missig lang. Haltere schlank spindelférmig, Stiel missig lang und miissig diinn.

Kopf braunschwarz, Augen schwarz, Fiihler dunkel gelblich braun. Ocellen

braungelb. Thorax dunkelbraun. Abdomen dunkel gelblich braun, unten braungelb ;

Legerohr und die Cerci schwarz, Beine mit den Coxen hell braungelb, Tarsen schwiirzlich,

190 PERCY SLADEN TRUST EXPEDITION

Fliigel schwirzlich grau; Adern gelbbraun, c, r und rr mehr schwirzlich. Membran

stark violett bis griin irisierend. Halteren schwarzbraun,; Stiel braungelb.

Kérperliinge : 24—34 mm.

Fliigelliinge : 2?—3 mm.

Thorakallange : 0,9—1 mm.

Abdominallinge : 1,7—2,5 mm.

Fiihlerlinge : 1 mm.

Linge des Hinterschenkels: 0,8 mm.

Liinge der Hinterschiene: 1,2 mm. bei den gréssten Exemplaren.

Liinge des Hintertarsus: 1,1 mm.

Vorkommen. Seychellen. Mahé: Cascade Estate, 800—1500 Fuss, X. 1908—I. 1909,

5 ¢; Gebiet von Mare aux Cochons, ungefiihr 1500 Fuss hoch, I.—II. 1909, 1 9.

Typen im Museum von London, Stettin und Cambridge.

AmeEsicrium, Enderl. 1911.

Enderlein, Arch. f. Naturg. 1911, i. 3. Suppl. p. 128.

Typus: Amesicrium nanum, Enderl. 1911. Seychellen.

Sehr kleine Form. Media und Cubitus sind durch ziemlich breite grauschwirzliche

Linien dargestellt, die keine scharfen Conturen aufweisen. Die Media ist nicht gegabelt

sondern einfach. Sonst wie Sciara.

8. Amesicrium nanum, Enderl. 1911.

2. Kopf und Augen schwarz. Fiihler gelblich schwarzgrau mit weisslichgrauer

Pubescenz, miissig diinn, die Geisselglieder etwas liinger als breit. Augenbriicke ziemlich

schmal. Kopf relativ gross.

Thorax miissig gewélbt, schwarz. Abdomen schwarzbraun, lang und ziemlich diinn,

allmiihlich zugespitzt, Legerohr schlank, Endglied der Cerci oval. Beine fein behaart,

Coxen gelblich schwarzgrau, Trochanter und Schenkel hellgrau gelblich; Schienen

grauschwarz, Tarsen schwarz.

Fliigel grau, Microtrichen kurz und dicht. Randpubescenz sehr lang, am Vorderrand

dichter. 7, und rv sind schwiirzlich, scharf, deutlich doppelt contouriert. Media und

Cubitus als ziemlich breite deutliche graue Linien, die aber keine scharfen Conturen

aufweisen. Der als Querader erscheinende Basalabschnitt von rr miissig scharf. Die

Randader erreicht nicht ganz die Mitte zwischen 77 und m. Die Zelle RR sehr breit.

Die Cubitalgabel in der Endhiilfte sich sehr stark verbreiternd. Cubitalgabel missig kurz,

ca. 3-mal so lang wie der Basalabschnitt von rr. Analis bis zur Mitte von m, reichend.

Axillaris etwas kiirzer. Membran schwach rot bis blau irisierend.

Kérperlinge: 1,1 mm.

Fliigelliinge : 1,05 mm.

Liinge der Hinterschiene: 0,68 mm.

Vorkommen. Seychellen. Mahé: Wald von ziemlich verkriippelten Capucin-

Bitumen (Northea), auf dem Gipfel von “Montagne Anse Major,” ungefiihr 2000 Fuss,

1. IL. 1909, 1 2 (im Museum von London).

LL ON

ENDERLEIN—DIPTERA, SCIARIDA Oil

CERATIOSCIARA, Enderl. 1911.

Enderlein, Arch. f. Naturg. 1911, i. 3. Suppl. p. 183.

Typus : Ceratiosciara corniculata, Enderl. 1911. Seychellen.

Tafel 9, Fig. 10, Maxillarpalpus.

Geiider wie bei Sciara. Maxillarpalpus (ausser dem reducierten Trochanter)

I-ghedrig. Fiihler ungewohnlich kurz (ca. 4 der Fliigelliinge); die Geisselglieder

ungewohnlich kurz, mit Ausnahme der 2 ersten Glieder und des Endgliedes bei vor-

liegender Species fast nur halb so lang wie breit. Klauen ungeziihnt. Augen unbehaart.

Auch im weiblichen Geschlecht gefliigelt (im Gegensatz zu Dasysciara, Mycosciara und

Aptanogyna). Das g liegt nicht vor.

9. Ceratiosciara corniculata, Enderl. 1911 (Tafel 9, Fig. 10, Maxillarpalpus).

¢. Kopf rundlich, so weit wie der Thorax. Scheitel ziemlich lang, ca. 4—5-mal

so lang wie die Breite der schmalen Augenbriicke. Ocellen sehr klein, der vordere winzig

klem, nur als winziges Piinktchen bei 30—60-facher Vergrésserung erkennbar; der

vordere Ocellus wird hinten von der Tangente an den Vorderrand der hinteren Ocellen

tangiert; der Abstand der beiden hinteren Ocellen ist ca. 2 Ocellendurchmesser, der

Abstand vom Augenrand etwas mehr als 3 Ocellendurchmesser, und ihre Stellung ist

wenig vor der Mitte. der Scheitelliinge. Fiihler sehr kurz ca. 1 der Fliigelliinge ;

1. Basalglied wenig linger als breit; 2. Basalglied und die 2 ersten Geisselglieder so

lang wie breit, 3. bis 13. Geisselglied 13- fast 2-mal so breit wie lang; 14. Geisselglied

doppelt so lang wie breit und am Ende abgerundet. Fiihlerbehaarung kurz und relativ

kriéftig. Maxillarpalpus eingliedrig, mit ziemlich diinnem Stiel, nach dem Ende zu stark

keulig verdickt ; auf der Unterseite nach dem Ende zu mit 4 Borstenhaaren ; die ganze

Oberfliiche sonst mit feinen, missig langen Microtrichen sehr dicht besetzt.

Thorax hochgewolbt und vorn ein wenig iiber den Kopf ragend und so lang wie hoch.

Kopf sehr tief unten am Thorax eingelenkt. Behaarung wenig dicht, fein und kurz.

Brustkegel fast das Ende der Coxen erreichend. Scutellum breit und miissig lang, hinten

gleichmiissig flach gerundet. Postscutellum nicht linger als das Scutellum, kaum

gesenkt und sehr wenig gewélbt. Abdomen schlank, allmihlich verjiingt, ein Stiick der

Spitze sehr diinn und spitz. Cercus ziemlich gedrungen, erstes Glied so lang wie breit,

2. Glied oval. Beine miissig schlank, Pubescenz kurz, Fussbérstchen fehlen.

Fliigel ziemlich zart ; Microtrichen sehr kurz. Die Subcosta erstreckt sich fast bis

zur Basis von v7, aber nur das Basaldrittel ist scharf. 7 ist ca. 1} von 7, und miindet

stark proximal von der Mediangabelung etwa in der Mitte des Vorderrandes. Der

Mediangabelstiel ist nahezu 14 von m,. Mediangabel ziemlich breit und kurz, die Aste

ziemlich gleichmiissig und miissig stark divergierend. Die Cubitalgabel am Ende 13 so

breit wie die Mediangabel. Zelle R sehr schmal und parallel. rr ziemlich gerade, in der

Mitte sehr seicht und wenig deutlich gebogen. Zelle #, ziemlich breit, in der Mitte am

breitesten, Basalteil sehr schmal. Cubitalgabelstiel etwas linger als halb so lang wie

der Basalabschnitt der Media. 7, ca. 24-mal so lang wie die Radiocubitalquerader.

rr ca. 22 von 7, Die Costa endet am Ende des 4. Fiinftels zwischen vr und ™m,.

SECOND SERIES—ZOOLOGY, VOL. XV. 25

192 PERCY SLADEN TRUST EXPEDITION

Randpubescenz dicht und kurz, am Hinterrand weniger dicht. Halteren nicht sehr lang

aber mit breitem abgeflachten (Discus-artigen) ovalen grossen Kopf und ebensolangem

miissig diinnen Stiel.

Kopf schwarzbraun. Fiihler und Maxillarpalpus blass schmutzig gelb. Thorax

rostgelb bis rostbraun. Abdomen hell schmutzig gelb mit schwarzbrauner Spitze bis

schwarzbraun (letztere Farbe wohl durch Schrumpfung erzeugt). Beine blass schmutzig

gelb, Klauen gelblich. Fliigel blass grau, Adern hell grau, Costa etwas dunkler, Radius

schwiirzlich. Membran sehr schwach rotlich bis bliulich irisierend; bei einzelnen

Exemplaren ist dieser Glanz etwas stirker.

Korperliinge : 1,6—1,8 mm.

Fliigelliinge : ca. 2,1 mm.

Liinge des Hinterschenkels: 0,6 mm.

,, der Hinterschiene: 0,6 mm.

, des Hintertarsus: 0,42 mm.

, 1. Hintertarsengliedes: 0,18 mm.

an ae: AR 0,08 mm.

= ee ss 0,04 mm.

aes m 0,05 mm.

59) 40: 5 0,08 mm.

Vorkommen. Seychellen. Silhouette: Mare aux Cochons, [X. 1908, 1 9. Mahé:

Cascade Estate, 1909, 5 3.

Typen im Museum von London, Stettin und Cambridge.

PsEcTROSCIARA Kieffer.

(10)*. Psectrosciara mahensis Kieffer (Tafel 9, Fig. 12—14).

Es liegen folgende Exemplare vor :

Seychellen. Mahé: Cascade Estate, 800—1500 Fuss, X. 1908—III. 1909. 2 Ex,

davon 1 Type (Kieffer’s).

Kieffer stellt diese Gattung zu den Sciariden und ich stellte sie in Arch. f. Naturg.

1911, 1. 3. Suppl. p. 192 zu den Lestremiinen ; letztere Publication erschien leider friiher,

als die vorliegende viel frither im Manuscript abgeschlossene Arbeit.

ANHANG.

BESCHREIBUNG NEUER SCIARIDEN VON DEN SEYCHELLEN-INSELN.

Von Pror. Dr. J. J. Kierrer (Bitsce).

(Tafel 9, Fig. 11—14.)

PSECTROSCIARA, nov. gen.

Augen kahl. Palpen kurz, eingliedrig. Antennen kurz, 2 + 14-gliedrig. Geissel-

glieder meist kiirzer als breit. Fliigel ohne liingere Behaarung, nur mikroskopisch fein

beborstet ; Cubitus von der Costalis nicht tiberragt. Empodium lang, breit, vielteilig,

* This number refers to Kieffer’s description in the “ Anhang,” p. 193.—H. Scorv.

ENDERLEIN—DIPTERA, SCIARID Ai 193

wenigstens so lang wie die Krallen, welche einfach sind; Pulvillen fehlend. Mundteile

aus 2 lanzettlichen, am Ende abgestutzten oder ausgerandeten, schwach chitindsen und

fast kahlen Lappen zusammengesetzt.

10. Psectrosciara mahensis, nov. spec. (Tafel 9, Fig. 12, Fliigel, 9; Fig. 13,

Endglied des Vordertarsus; Fig. 14, Analanhiinge).

?. Ganz schwarzbraun. Die beiden ersten Antennenglieder etwas dicker als die

folgenden ; 3.—7. etwas quer; 8.—15. so lang wie dick; 16. dreimal so lang wie das

vorletzte ; alle anliegend und fein behaart. Thorax wie bei Sciara. Fliigel (Fig. 12)

glashell, mikroskopisch fein beborstet ; Radius das proximale Fliigeldrittel nicht iiber-

ragend, in seiner Mitte, durch eine Querader, mit dem Cubitus verbunden ; Cubitus fast

gerade, von der Costalis nicht iiberragt, ihre Miindung von der Fliigelspitze weit entfernt;

Discoidalis an der Querader entspringend, in ihrer Mitte gegabelt, hintere Zinke gerade,

die Richtung des Stieles fortsetzend, die vordere proximal stark nach vorn gebogen, vor

der Fliigelspitze miindend; Posticalis fast am Grunde gegabelt, ihre Zinken schwach

bogig, die vordere den Fliigelrand nicht erreichend; Analader kurz, stark gebogen.

Beine ohne lange Behaarung; Sporen kurz; Metatarsus aller Beine etwas linger als die

zwei folgenden Glieder zusammen, 2. Glied fast doppelt so lang wie dick; 4. kaum

linger als dick, wenig kiirzer als das 3. ; Endglied dem 3. gleich; Krallen stark gebogen,

schlank und einfach ; Empodium wenigstens so lang wie die Krallen, vielteilig, jeder Teil

fadenférmig und glashell, ventral mit langen Haaren (Fig. 13). Analsegment dorsal ohne

die gewohnlichen Lamellen, aber mit einen bogig nach unten gekriimmten Anhang,

welcher vor dem Ende eingeschniirt ist, ventral mit zwei einfachen, dreieckigen und kurz

bewimperten Fortsiitzen (Fig. 14). Linge: 1,5 mm.

Vorkommen. Seychellen. Mahé: Cascade Estate, ungefihr 800 Fuss, 1 9.

ScraRa.

11. Scrara mahensis, nov. spec. (Tafel 9, Fig. 8, Fliigel 2).

?. Schwarzbraun, Femora briiunlich. Palpenglieder allmiihlich linger. Antennen

distal diinner; Flagellumglieder walzenformig, doppelt so lang wie dick, stielartige

Einschniirung am Distalende quer, Haare kiirzer als die Dicke der Glieder. Fliigel

(Fig. 8) dunkel, mikroskopisch fein beborstet ; Geiider wie bei voriger Art. Femora mehr

als doppelt so lang wie die Tibien ; Metatarsus 2—3-mal so lang wie das 2. Glied, dieses

wenig linger als das 3.; 3.—5. gleichlang, doppelt so lang wie dick; mittlerer Tarsus

kaum kiirzer als die Tibien, hintere Tibien um die Hiilfte linger als der Tarsus ;

Krallen einfach ; ohne deutliches Empodium; Behaarung der Beine kurz, anliegend,

dicht und borstenartig. Abdomen hinten allmiihlich diinner, Analsegment mit zwei

zweigliedrigen Lamellen, unter denen ein Paar kleinerer Fortsitze hervorragt. Linge :

1,5 mm.

Vorkommen. Seychellen. Silhouette: in der Niihe von Mont Pot-d-eau, 1500 Fuss,

VIII. 1908. Mahé: Cascade Estate, 800—1500 Fuss, 1908—9, 2 Ex.

12. Scrara leucocera, nov. spec. (Tafel 9, Fig. 9, Fliigel $; Fig. 11, Zangenglied).

f@. Gelb; Scheitel, distale Hiilfte der Antennen, Tibien, Tarsen und Oberseite des

25—2

194 PERCY SLADEN TRUST EXPEDITION

Abdomens, ausgenommen hellere und wenig abgegrenzte Querbinden, schwarzbraun ;

proximale Hilfte der Antennen gelblichweiss ; Coxen und Femora weisslich. Augen fein

behaart, oben weit von einander abstehend; Ocellen ein Dreieck bildend. Palpen

3-gliedrig, 1. und 2. Glied ziemlich gleich, 2—3-mal so lang wie dick, 3. etwas linger,

proximal verengt. Antennen dick, 2 + 14-gliedrig, distal allmihlich diinner; Flagel-

lumglieder walzenformig, 2—3-mal so lang wie dick, am Distalende mit einer stielartigen

Einschniirung, welche ein 4 oder } ihrer Linge erreicht, Haare kiirzer als die Dicke der

Glieder, auf der einen Seite der Glieder, auf 4—6 queren, parallelen und leistenartigen

Verdickungen stehend, auf der anderen Seite dichter und ohne Leisten. Fliigel glashell,

mikroskopisch fein beborstet (Fig. 9); Radius in die Fliigelmitte miindend, hinter dem

2. Drittel, mit dem Cubitus durch eine Querader verbunden; Cubitus, in der Mitte,

schwach nach vorn gebogen, weit vor der Fliigelspitze miindend, von der Costalis weit

tiberragt, diese fast in die Fliigelspitze miindend ; Discoidalis ziemlich weit proximal von

der Querader entspringend, distal von der Mitte gegabelt, beide Zinken gleichmiissig

von der Richtung des Stieles abbiegend, dann parallel, die obere kaum hinter die

Fliigelspitze miindend; Posticalis ziemlich nahe am Grunde gegabelt, beide Zinken

schwach bogenformig; Analader unvollstindig und fast gerade. Femora mehr als

doppelt so dick wie die Tibien; Sporen kurz und geziihnelt; 1. und 2. Tarsenglied

gleich, 4-mal so lang wie dick; das 3. wenig kiirzer als das 2.; das 4. dem 5. gleich,

doppelt so lang wie dick; Krallen einfach; ohne deutliches Empodium. Zange (Fig. 11)

gross, wenigstens ein Drittel der Liinge des Abdomens erreichend ; Endglied 23-mal so

lang wie dick, am Grunde diimner, am Distalende innen mit einem Biischel schwarzer

Borsten. Linge: 1,5 mm.

Vorkommen. Seychellen. Mahé: Cascade Estate, 800—1500 Fuss, 1909, 2 2.

ERKLARUNG DER TAFEL 9.

Fig. 1. Scrara rimiscutellata, n. sp. (Enderl.) 2, Fliigel x 25.

Fig. 2. Sciara seychellensis, n. sp. (Enderl.) 3, Fliigel x 25.

Fig. 3. Sciara albicoxa, n. sp. (Enderl.) ¢, Fliigel x 25.

Fig. 4. Sciara biformata, n. sp. (Enderl.) ¥, Fliigel x 25.

Fig. 5. Sciara biformata, n. sp. (Enderl.) 2, Fliigel x 25.

Fig. 6. Sciara nigriceps, n. sp. (Enderl.) ¢, Fliigel x 25.

Fig. 7. Sciara divergens, n. sp. (Enderl.) 3, Fliigel x 25.

Fig. 8. Sciara mahensis, n. sp. (Kieffer) 2, Fliigel x 53.

Fig. 9. Sciara leucocera, n. sp. (Kieffer) ¥*, Fliigel x 53.

Fig. 10. Ceratiosciara corniculata, n. g. et n. sp. (Enderl.) 2, Maxillarpalpus.

Fig. 11. Sciara leucocera, n. sp. (Kieffer) ¥, Zangenglied.

Fig. 12. Psectrosciara mahensis, n: g. et n. sp. (Kieffer) $, Fliigel.

Fig. 13. Psectrosciara mahensis, un. g. et n. sp. (Kieffer) ¢, Endglied des Vordertarsus.

Fig. 14. Psectrosciara mahensis, n. g. et n. sp. (Kieffer) 2, Analanhainge.

Percy SLADEN TRUST EXPEDITION. Trans. Linn. Soc., SER. 2.Z00L. VOL.XV. PL. 9

(ENDERLEIN)

Glinther Enderleir

a J.J. Kieffer del

No. XIV.—DIPTERA, TIPULID.

By F. W. Epwarps, B.A. (Cantab.), F.E.S.

(Contributed by permission of the Trustees of the British Museum.)

(Plates 10 and 11.)

(CommunicateD By Pror. J. Stantey Garpiner, M.A., F.R.S., F.L.S.)

Read Ist February 1912.

THE collections here described comprise 24 or 25 species taken in the Seychelles

by Mr Hugh Scott, together with 3 collected by Mr J. C. F. Fryer in Aldabra. Those

taken in the Seychelles were practically all obtained in the high endemic mountain

forests, which will account for the very large proportion of new species. One would,

however, naturally expect the Tipulid Fauna of the Seychelles to be of considerable

interest, more particularly as no member of the family has until now been recorded

as occurring in those islands. Such expectations have been fully realised, for of the

27 species described in the sequel no less than 23 appear to be new to science.

Taken together, the membership in the different groups is as follows :

Limnoprnt 10 (11 2).

RHAMPHIDIINI 8.

ERIOPTERINI 5.

ANISOMERINI 4.

It will be seen at once from the above that the Limnophilini and the Tipulidee

longipalpi are quite unrepresented. This is remarkable, as Limnophila, Tipula, and

Pachyrrhina are usually well represented in the tropics. The common tropical genus

Eriocera too is badly represented, and the two species here assigned to it approximate

to Penthoptera in size and in their somewhat pubescent wings; it may be that the

genus Penthoptera will have to be given up. Penthoptera only differs from Hriocera

in that its members have hairy wings, and the two Seychelles species seem to be

intermediate, since the wings are only slightly hairy at the tip. They are smaller than

most of the species of Hriocera. Apart from these rather surprising negative characters,

the fauna shows some interesting features. Thauwmastoptera aldabrensis, it correctly

placed, is the second species of the genus, the other being European; Anisomera had

only been recorded from Europe and America; Thrypticomyia and Tasiocera only from

196 PERCY SLADEN TRUST EXPEDITION

Australia. All the species here described as new, with the exception of Geranomyia

mmaculata, fit fairly well into existing genera. The most interesting insects in the

collection however are the Ceratocheilus and the two species of Styringomyia; these

have also proved of value indirectly, since in determining them I have been able to

clear up some interesting points of synonymy.

The relationships of the fauna as a whole are necessarily not very evident, since

the collection of Tipulidee in the tropics has been so much neglected, owing no doubt

to their extreme fragility. There seems however to be a closer connection with Africa

than with India. The various relationships can best be expressed by means of a

table :

Seychelles Species Nearest Ally

— Xx Sos ee = ae ———

Name External Distribution Name | Distribution

Dicranomyia tipulipes 8. Africa D. tangentialis, D. con- | E. Africa

similis

D. gardinert W. and 8.E. Africa 2D. vicarians New Zealand (Antarctic)

D. spadicithorax —— D. pulchra Java

D. afra Caffraria

Thrypticomyia seychellensis os T. awripennis EK. Australia

Limnobia rhizosema Kilimandjaro, E, Africa

L. mahensis —. L. wmbrata Java; Singapore; Taiping;

E. Africa (Mombasa)

Teucholabis flavonotata Africa (L. Victoria Nyanza) || An undescribed species | Mashonaland

Elephantomyia insularis — 12. wahlbergi Caffraria

Ceratocheilus seychellarum —- % Toxorrhina madagas- | Madagascar

cartensis

Cerat. cornigerum Kamerun

Styringomyia annulipes Madagascar S. crassicosta Africa

S. ceylonica India; Ceylon; Straits

Settlements

Mongoma pennipes Borneo ; Ceylon; Semarang

In regard to some of the generic names used, explanation is necessary. Some

writers are following Hendel and Coquillet in adopting the nomina nuda—for such

they are for practical purposes—of ‘“ Meigen’s 1800 paper.” The present writer, in

common with many of our leading dipterists, refuses to accept these, for other reasons

besides the one given. Secondly, the name Furcomyia, substituted by Coquillet for

Dicranomyia, is rejected. The writer considers that its validity dates from 1910, as

Meigen merely quoted it as a manuscript name given by Megerle, and neither adopted

it nor gave any description. Dicranomyia therefore takes precedence. The same

argument will apply to “ Marginomyia” and Dicranoptycha. Limonia (Meigen 1803)

has sometimes been used for Iimnobia (Meigen 1818), but is not adopted here, as the

EDWARDS—DIPTERA, TIPULIDA 197

first description (of Limonia) is totally adequate, and, moreover, Meigen states that

the antenne are 16-jointed, which is not the case in the typical species of his Limnobia.

Thus there seems no necessity to reject this well-established name. H7iocera is used

in preference to Caloptera or Evanioptera; Caloptera was published without description ;

Evanioptera, as far as I can ascertain, two or three months later than Hriocera.

Sub-fam. Limnobiine. Group Limnobiini.

Genus Dicranomyra Stephens, Cat. Brit. Ins., ii. 243 (1829).

1. Dicranomyia tipulipes Karsch, Ent. Nachr., xii. 51, 1 (1886). (Plate 10, fig. 1,

wing; plate 11, fig. 1, ¢ genitalia.)

Length ¢ body 5 mm., ? body 6 mm.

Fe ,, wing 6 mm., ,, wing 7 mm.

These specimens are smaller than the type, as Karsch gives a wing measurement of

85 mm. They also differ in the absence of a yellow margin to the median band of the

thorax, and in the fact that the 6th longitudinal vein is not markedly paler than the rest.

It is possible therefore that they may prove eventually to be distinct from D. tipulipes.

I have failed to find any real difference between D. tipulipes Karsch, and D.

consimilis Bergroth, by comparing the descriptions, and think it probable that they and

the Seychelles specimens are merely forms of one species. The chief distinguishing

character given by Bergroth, viz., the length of the small cross-vein, is variable in the

specimens before me; in three the submarginal cell and discal cell actually touch ; in the

others there is a short cross-vein separating them. The present specimens all have a

blackish spot at the base of the basal cells, which is mentioned by Karsch but not by

Bergroth. Karsch’s statement that D. tipulipes has 15-jointed antenne is probably a

mistake; in all the Seychelles specimens the antennz are normal. Karsch does not

mention the blackish tips of the tibie. D. tangentialis Speiser, from Kilimandjaro, is also

very closely allied, though perhaps distinct.

Loc. Seychelles. Silhouette: Mont Pot-a-eau, 2 9. Mahé: Forét Noire, 12; Mare

aux Cochons, about 1500 feet, 12; Cascade Estate, 800—1500 ft., 1%, 19. Also South

Africa: Pungo Andongo (Karsch); Cape Town (L. Péringuey); Caffraria (D. consimilis

Bergroth).

2. Dicranomyia gardineri, sp. n. (Plate 10, fig. 2, wing; plate 11, fig. 2, ¢

genitalia. )

Cinereo-fusca, thorace fusco-trilineato, alis parum infuscatis et maculatis, venula

transversd parva, brevi.

$9. Head: antennz dark, joints about as long as broad. Thorax greyish, a

median and two smaller lateral brown stripes on mesonotum before suture, two brown

spots on mesonotum behind suture. Legs testaceous, tips of femora and tibiz indistinctly

darker. Wings faintly fuscous-tinged; dark spots at base of basal cells, at base of

preefurea, and on the marginal cross-vein (the stigma); sometimes also on first longitu-

dinal and at apex of prefurca. Veins dark; first longitudinal sometimes paler.

198 PERCY SLADEN TRUST EXPEDITION

Mediastinal vein reaching costa almost at origin of preefurca, subcostal cross-vein close to

its tip; first longitudinal vein sharply bent up to costa near its tip, marginal cross-vein

nearly in a line with the bent portion, at about 4 the length of the submarginal cell ;

submarginal cell slightly expanded at apex, nearly twice as long as preefurca. Knob of

halteres grey, stalk whitish ochreous. Abdomen fuscous.

Length of body 4°5—6 mm.

at wing 5—7 mm.

This species varies considerably in size and in the distinctness and amount of the

dark markings on the wings. It appears to come nearest to D. vicarians Schiner,

though there may be no real relationship. The two are certainly quite distinct.

Loc. Seychelles. Mahé: Cascade Estate, 800—1500 ft., 93, 72; Forét Noire,

224; forest behind Trois Fréres, 2000 ft., 1 3,192. Also Africa: the following are in the

British Museum; Obuasi, Ashanti, 7. vi. 1907, 1 ¢ (Dr W. M. Graham); Mt. Chirinda

(S. Rhodesia) 3000 ft., 31. v. 1911, 1 2, and 12. vi. 1911, 1 ¢, 19 (C. F. M. Swynnerton).

2a. Dicranomyia sp.

A single immature specimen (%). It closely resembles D. seychellarum in neuration

and colouring, but the wings are entirely unspotted. There are also differences in the

genitalia. The absence of spots on the wings may be due to its immature state.

Loc. Seychelles. Mahé: Cascade Estate, 800—1500 ft.

3. Dicranomyia spadicithorax, sp. n. &.

Fusca, thorace supra fusco-spadice, femoribus ad basin ochreis, alis marmoratis et

maculatis, antennarum articulis moniliformibus et maculatis.

?. Head greyish, nearly globular; eyes, rostrum and neck black. Antenne

slightly longer than head and rostrum together, with the scape fuscous, first joint curved,

more than twice as long as second; joints of flagellum moniliform, without any sign of

pectination, but rather broader than long, 3rd, 5th, 7th, 9th, 11th, 13th and 14th brown,

4th, 6th, 8th, 10th and 12th light ochreous. Rostrum somewhat produced, about as long

as the head. Neck rather long and narrow. Thorax with a large chocolate-brown patch

above, extending downwards to the level of the insertion of the wings, bordered by a fine

white line; pleurze pale ochreous with three chocolate-brown longitudinal stripes: one

broad and median, the others narrow and interrupted, just below the base of the wings

and along the base of the coxee. Legs very dark brown, basal two-thirds of femora pale

ochreous; middle tibize paler brown in the middle. Wings pale ochreous, mottled over

the whole surface with light grey; all the cross-veins more or less infuscated ; blackish

spots distributed as follows : one or two on the first longitudinal vein ; at the apex of the

mediastinal vein; at the base of the preefurca; at the apex of the preefurca (the largest

and most conspicuous) ; on the marginal cross-vein ; at the apex of the anterior branch of

the second longitudinal vein, of the discal cell and of the seventh longitudinal. Tip of

mediastinal vein a little beyond the origin of the prefurea, the subcostal cross-vein close

to this tip; marginal cross-vein near the tip of the first longitudinal, which is bent

sharply up towards the costa at about # of the length of the wing; second posterior cell

EDWARDS—DIPTERA, TIPULIDA& i99

“very narrow at base. Halteres pale ochreous, knob marked with brown. Abdomen

brown above, pale beneath, with one dark brown lateral line; base and sides of first

segment dark chocolate-brown.

Length of body 7 mm.

Bs wing 6°5 mm.

This species is closely allied by its moniliform antennz and wing-markings to

Rhipidia afra Bergroth, but differs markedly in its smaller wings and in the coloration

of the thorax. It shows still greater resemblance to A. pulchra Meijere, from Java.

The chief differences are that in FR. pulchra the antennz are unspotted (%), the pleurz

have only two brown stripes, the abdomen is pale above and below, and the bases of the

tibize as well as of the femora are ochreous; the dark spot on the 7th longitudinal vein is

near but not at the apex.

Loc. Seychelles. Mahé: 49 from Cascade Estate, 1909.

Meijere has recently (Tijd. v. Ent., 1911, p. 27) recorded the male of R. pulchra and

now places the species in Dicranomyia, and without doubt the present species must be

placed in the same genus. I consider, however, that these species, and others I have

seen from Africa, render it advisable to sink Rhipidia as at most a subgenus of

Dicranomyia. The antennz of the species of Ahipidia seem to show insensible gradations

from being quite simple to ‘being strongly pectinate. The British Museum possesses ¢

and $ specimens of R. afra from Uganda, and the antennze are not pectinate in either

sex, so that this species, at least, is a Dicranomyia.

Genus THrypticomyiA Skuse, Proc. Linn. Soc. N. 8. Wales, ser. 2, iv. 774 (1890).

4. Thrypticomyia seychellensis, sp. n. (Plate 10, fig. 3, wing; plate 11, fig. 3, g

genitalia. )

Fusca, thorace rufescente, tarsis albis; alis hyalinis, stigmate infuscato, brevi.

49. Head blackish, antenn dark fuscous. Thorax rufescent ochreous, more fuscous

above, almost globular in shape. Legs dark fuscous; coxze reddish ochreous, femora

lighter towards the base, tarsi with apical 3 of metatarsus, and the 2nd and 8rd joints

white ; 4th and 5th, sometimes also part of 3rd pale brown, claws dark. Wings hyaline,

tinged with brown on the outer half, with violet or coppery reflections ; stigma distinct,

short, fuscous; veins and margins fringed with hairs; usually the subcostal cross-vein is

just before, and the tip of the mediastinal vein a little after, the origin of the preefurca ;

marginal cross-vein about in the middle of the stigma, placed some distance before the

tip of the first longitudinal vein, which ends freely in the wing; supernumerary cross-

vein usually precedes marginal only by a distance about equal to its own length, both it

and the marginal cross-vein are sometimes unpigmented, and so may appear at first sight

to be absent ; great cross-vein about middle of discal cell. Halteres dark fuscous, base of

stalk ochreous. Abdomen dark fuscous, lighter below.

? with the abdomen markedly contracted at base.

Length of body 4—6 mm.

wing 5—7 mm.

si legs 13—17 mm.

SECOND SERIES—-ZOOLOGY, VOL. XV. 26

200

PERCY SLADEN TRUST EXPEDITION

This species is very close to ZT. auripennis, from Sydney, N.S.W. The chief

differences may be tabulated as follows (the characters of 7. auripennis are drawn from

2 specimens in the British Museum) :

T. seychellensis.

Thorax rufescent ochreous.

Apical 2 or more of metatarsus white.

Apical tarsal joints light brown.

Tip of mediastinal vein usually beyond origin of

preefurca.

Stigma shorter.

Supernumerary cross-vein preceding marginal by a

distance usually not much greater than its own

length,

Halteres shorter.

T. auripennis.

Thorax light ochreous brown.

Half of metatarsus white.

Apical tarsal joints white.

Tip of mediastinal vein opposite origin of przefurea.

Stigma longer.

Supernumerary cross-vein preceding marginal by a

distance several times its own length.

Halteres longer.

I have seen two species from Ceylon, which though they do not invalidate the genus

differ in several respects from both 7. seychellensis and 7. auripennis (vide Ann. Mag.

Nat. Hist., (8) vill. 1911, p. 58). Brunetti (Rec. Ind. Mus., vol. vi. p. 270) considers that

Thrypticomyia is untenable. Admittedly it stands very close to Dicranomyia.

Loc. Seychelles. Found in shady places in the mountain-forests; a number of

specimens often hang by their front tarsi in rows, suspended from threads of webs

stretched between bushes etc. (See Scott’s introductory paper, vol. XIV. of these

Transactions, p. 382.) Mahé: Cascade Estate, 800—1500 ft., 14 3, 189; Morne Seychel-

lois, over 1500 ft., 13; Morne Blanc, 12; above Port Glaud, 500—1000 ft., 1¢.

Silhouette: near Mont Pot-a-eau, 1500 ft., 82, 69.

Genus GreRANOMYIA Haliday, Ent. Mag., i. 154 (1838).

Subgenus MonopHana, n. Palpi uniarticulati. Venula transversa subcostalis ab apice

ven auxiliaris remota; vena longitudinalis prima ad costam non attingens.

(Plate 10, fig. 4, wing.)

5. Geranomyia (Monophana) immaculata, sp. n.

Rufescens, pedibus testaceis, alis inmaculatis, venis ochreis.

?. Head with collar and rostrum black, eyes outlined with whitish, antennz dark

brown, joints of flagellum about as long as broad, rostrum shorter than thorax.

reddish ochreous with a darker central stripe above.

minute black dots, femora somewhat darker at tip.

Mediastinal vein reaching costa at origin of preefurca, subcostal cross-vein

ochreous.

Thorax

Legs testaceous, trochanters with

Wings hyaline, stigma absent, veins

placed far before the tip, a distance greater than the length of the preefurca; first

longitudinal vein not reaching costa, marginal cross-vein at its tip; submarginal cell

24 times the length of the przefurea, slightly contracted at apex.

ochreous. Abdomen fuscous.

Halteres reddish

This species has a facies quite unlike that of the European Geranomyia, though it

must be included in that genus at present.

EDWARDS—DIPTERA, TIPULIDA 201

Length of body 5 mm.

i. wing 5°5 mm.

rostrum 1°2 mm.

Loc. Aldabra, 1 9.

Genus LimnosiA Meigen, Syst. Beschr., i. 116 (1818).

(Iimonia Meigen, Illiger’s Mag., ii. 262, 1803.)

6. Limnobia rhizosema Speiser (Limonia), Wiss. Ergebnisse der Schwedischen Zool.

Exp. nach dem Kilimandjaro, 11. 10 (Diptera) 4, p. 48 (1909).

Dr Speiser has kindly confirmed my determination of this species. The Seychelles

specimens differ from the type in the position of the dark band of the femora: typically

this is apical, but in all the Seychelles specimens it is just before the apex. In one of

Speiser’s specimens however this was the case, and he does not consider the difference to

be specific.

Loc. Seychelles. From the mountain-forests. Mahé: Morne Blanc, 12; Forét

Noire, 13; Cascade Estate, 33,19. Silhouette: Mont Pot-d-eau, 13, 19; Plateau of

Mare aux Cochons, 1 ¢. Also East Africa, Kilimandjaro (Swedish Zool. Exp.).

7. Limnobia mahensis, sp. n. (Plate 10, fig. 5, wing; plate 11, fig. 4, $ genitalia.)

Ochrea, infuscata, pleuris fusco-unilineatis, alis subfuscis, fusco-maculatis ; anten-

narum articulis aeque longis ac latis.

$9. Head dark; antenne alike in both sexes, hardly as long as thorax, dark

brownish, joints about as long as broad. Thorax rather bright brownish ochreous, with

a dark fuscous stripe along the pleurz ; a median stripe on mesonotum in front of suture,

2 spots behind suture and a spot on metanotum darker brownish. Legs testaceous, tips

of femora somewhat darker. Wings light fuscous, darker fuscous spots at the base and

apex of the prefurca and on the marginal cross-vein, other cross-veins infuscated.

Mediastinal vein reaching costa at the level of the middle of the praefurca, subcostal cross-

vein at its tip; prefurea more or less distinctly angulated, sometimes emitting a vein-

stump towards the base of the wing; tip of first longitudinal vein sharply bent up

towards the costa, nearly in a line with the marginal cross-vein ; submarginal cell hardly

half as long again as the preefurea. Halteres fuscous, base of stem ochreous. Abdomen

fuscous above, brownish ochreous below, genitalia dark brownish.

Length of body 4°5—5°5 mm.

7 wing 5°5—6'5 mm.

This species has a very Dicranomyia-like appearance.

Loc. Seychelles. Mahé: Mare aux Cochons, 1500 ft., 5%, 49; Cascade Estate,

800—1500 ft., 3 ¢, 3.

Dicranomyia umbrata Meij. (Tijd. v. Ent., 1911, p. 25) from Java is evidently a true

LIamnobia, and very closely allied to L. mahensis, but the thorax is rather darker, the

angulation of the praefurca is imperceptible, and the genitalia differ (I have compared

26—2

202 PERCY SLADEN TRUST EXPEDITION

mounts of the genitalia of the two species). Specimens of L. wmbrata from Singapore,

Taiping (Straits Settlements), and Mombasa (HE. Africa), are in the British Museum

Collection.

8. Limnobia magnicauda, sp. n. (Plate 10, fig. 6, wing; plate 11, fig. 5, ¢ genitalia.)

Ochrea, infuscata, pleuris fusco-unilineatis, alis fuscis, immaculatis; antennarum

articulis duplo longioribus quam latis.

$2. Closely resembles LZ. mahensis in form and colour of body, but differs as follows:

Head: antennz in ¢ longer than head and thorax together, joints ovate, quite twice as

long as broad ; in ? shorter, joints shorter. Thorax: markings as in L. mahensis, but

indistinct. Legs: tips of femora not darker than the rest. Wings darker than in

L. mahensis, unspotted except for the stigma, which is situate on the marginal cross-

vein ; preefurea not angulated, gently curved at the base. Halteres fuscous, base of stem

ochreous. Genitalia large, ochreous with black hooks.

Length of body 5 mm.

3 wing 5 mm.

Loc. Seychelles. Mahé: high forest of Morne Blane and Pilot, 1 2; Morne

Seychellois, over 1500 ft., 1 ¢; Mare aux Cochons, 1500 ft., 22, 12; Cascade Estate,

SO00— > O00Mte, et

9. Lamnobia iridescens, sp. n.

Infuseata, thorace flavo-signato, alis iridescentibus, halteribus albis.

?. Differs from LZ. magnicauda as follows: mesonotum in front of suture orange,

except for a central posterior fuscous spot, behind suture dark fuscous ; apices of femora

somewhat thicker and darker; wings with brilliant purple reflections except at the tip,

which is coppery (these reflections can be seen though much less distinctly in L. magni-

cauda, but in that species are chiefly coppery, with very little purple); halteres entirely

translucent white.

Length of body 4 mm.

" wing 5 mm.

Loc. Seychelles. Mahé: Cascade Estate, 800—1500 ft., 1 9.

10. Limnobia thomasseti, sp.n. (Plate 10, fig. 7, wing; plate 11, fig. 6, $ genitalia.)

Ochrea, pleuris ochreis, haud lineatis; alis hyalinis, stigmate distincto, preefured

arcuata, cellulé submarginali preefurcd duplo longiore.

$2. Resembles L. magnicauda, but larger, more ochreous, and with the markings on

the back of the thorax more distinct ; no dark stripe on the pleure. Head greyish, eyes

outlined with white. Joints of antennz ovate, but shorter than in L. magnicauda,

almost moniliform ; antennz in both sexes shorter than thorax. Legs testaceous, tips of

femora ochreous, preceded by a slightly darker ring. Wings hyaline, only faintly tinged

with fuscous, stigma distinct. Tip of mediastinal vein ending in costa just before the

level of the base of the submarginal cell; praefurca strongly curved at base ; all the cells

EDWARDS—DIPTERA, TIPULIDA 203

round the tip of the wing rather long and narrow, submarginal almost twice as long as

preefurca. Halteres fuscous, base of stem ochreous. Genitalia rather large, ochreous

with black hooks.

Length of body 6 mm.

o wing 6°5 mm.

A similar but distinct species, of which there are specimens in the British Museum,

occurs in Eastern India.

Loc. Seychelles. Félicité, Dec. 1908, 1 #, 1 9. Mahé: Mare aux Cochons,

1HOOMit., 1

Group Rhamphidiini.

Genus ELEPHANTOMYIA Osten-Sacken, Proc. Acad. Philad., 1859, p. 220.

11. Elephantomyia insularis, sp. n. &.

Ochracea, segmentis abdominis fusco-marginatis; alis maculatis, stigmate alarum

infuseato.

. Head including antennze and rostrum dark fuscous; eyes black. Rostrum as

g ¥;

long as whole body, the palps inserted very close to its tip. Collar nearly as long as

y> pee I y 8

head. Thorax dark brownish ochreous, with very indistinct slightly darker markings ;

pleurz lighter ochreous. Legs except coxwe dark brown; femora very slightly thicker

and darker at apex. Wings faintly brownish, spotted with brown at the base of the

preefurca and on the cross-veins ; stigma opaque, brown. Mediastinal vein entering costa

just before the level of the great cross-vein; subcostal cross-vein almost at its tip;

no marginal cross-vein; the three veins arising from the discal cell equidistant at base.

Abdomen ochreous, the segments rather broadly fuscous-margined.

, 8 y 8

Length of body 8 mm.

55 wing 9 mm.

a rostrum 8 mm.

a legs 25 mm.

Loc. Seychelles. Mahé: Forét Noire, X.—XI. 1908, 1 9.

Genus CrratocHEILus Wesché, Jour. Linn. Soc. London, Zool., xxx. 358 (1910).

Neostyringomyia Alexander, Can. Ent., xliv. 85 (1912).

12. Ceratocheilus seychellarum, sp. n.

Cinereo-fuscum, thorace 3-vittato; venulis transversis infuseatis.

$9. Head: antenne blackish; occiput whitish; eyes smaller in 2 Rostrum as long

as abdomen. Neck long, black. Third joint of antennze not much smaller than second.

Thorax projecting over the neck, greyish, with a median and two lateral brown stripes,

the laterals more posterior; pleuree dark brown, edges of nota pale. Legs uniformly

dark; front femora markedly thickened at apex, middle and posterior femora also

thickened but to a less extent. Wings hyaline, base of second longitudinal vein, small

204 PERCY SLADEN TRUST EXPEDITION

and great cross-veins, and apex of discal cell infuscated. Halteves entirely pale ochreous.

Abdomen dark brown, the spaces between the terga ochreous.

Length of body 5 mm.

Fa wing 4 mim.

4 rostrum 4 mm.

Loc. Seychelles. Mahé: 2%, one from Forét Noire, X.—XI. 1908; marshes on |

coastal plain at Anse aux Pins and Anse Royale, 1 9. |

C. seychellarum is closely allied to C. cornigerwm Speiser (winn-sampsont Wesché)

(vide Ann. Mag. Nat. Hist., ser. 8, viii. 1911, p. 279), differing chiefly as follows: the ;

spots on the wings are fainter, and there is no spot on the 1st longitudinal vein midway

between the base and the origin of the prsefurca, which is well-marked in C. cornigerum ;

the rostrum is relatively longer and the second joint of the antenna smaller. From

Toxorrhina madagascariensis Meunier, the present species is distinguished by the

neuration (2), and by its smaller size and relatively longer rostrum ; the third joint of the

antennee is a little larger. It is possible that these three may eventually prove to be

only local forms of a rather variable species.

Genus OrIMARGA Osten-Sacken, Mon. N. Am. Dipt., iv. 120. x. (1869).

13. Orimarga scotti, sp. n. 3. (Plate 10, tig. 8, wing.)

Subrufescenti-cinerea, antennis palpisque nigris, pedibus fuscis; alis hyalinis, venula

transversA magni prope ortum preefurcee inserta, venuld transvers’ marginali ad apicem

venze longitudinalis primee inserta, cellula posteriore tertiai pedunculo longiore.

$. Head blackish, antenne and palpi black. First joint of antennze three times the

length of the second, joints of flagellum cylindrical, half as long again as broad. Rostrum

half as long as head. Thorax greyish ochreous, more grey above. Legs light fuscous,

femora except apex testaceous. Wings hyaline, stigma absent or very pale. Marginal

cross-vein near apex of first longitudinal, which is indistinct and bent sharply up towards

the costa; great cross-vein nearly opposite the origin of the preefurca ; third posterior cell

longer than its petiole, rounded at the base; submarginal and first posterior cells

contracted at apex. Abdomen dark brownish ochreous, genitalia ochreous.

Length of body 6 mm.

Es wing 6°5 mm.

Loc. Seychelles. Mahé: Cascade Estate, 800—1500 ft., 1909, 1 ¢.

14. Orimarga fryert, sp. n. ¢. (Plate 10, fig. 9, wing.)

Ochreo-cinerea, antennis palpisque nigris, pedibus testaceis ; preefurcd angulata,

cellula posteriore tertié pedunculo breviore. :

g. Head blackish, palpi black. Antennze brownish fuscous, shorter than the

thorax; joints of flagellum ovate, rather shortly hairy, half as long again as broad.

Rostrum as long as head. Thorax and abdomen ochreous grey. Legs very slender,

testaceous, apices of femora darker. Wings hyaline, stigma absent ; preefurea rather |

EDWARDS—DIPTERA, TIPULIDA 205

obtusely angulated near its origin, with a short stump of a vein extending from the angle

towards the base of the wing ; marginal cross-vein near apex of first longitudinal, which is

distinct and gently curved into the costa; great cross-vein opposite origin of preefurca ;

third posterior cell very short, shorter than its petiole, contracted to a point at the base.

Hlalteres pale ochreous.

Length of body 5 mm.

x wing 5 mm.

Loc. Aldabra, 1 $ at light.

Brunetti (Rec. Ind. Mus., vi. 1911, p. 280) describes a species of this genus from

Borneo. It is smaller than either of the two described here.

Genus THAUMASTOPTERA Mik, Verh. Z. B. Ges. Wien, xvi. 1866, p. 302.

15. Thaumastoptera aldabrensis, sp. nu. (Plate 10, fig. 10, wing.)

Ochraceo-cinerea, pedibus testaceis, alis hyalinis, stigmate pallido; apice ven

auxiliaris post medium al extensi, venuld transversi magna parum retracta.

o¢. Head dark; antennz ochreous grey, as long as the thorax, joints of the

flagellum ovate, twice as long as broad, with three or four long stiff hairs about their

middle; palpi fuscous. Thorax ochreous grey above, pleurse ochreous. Legs testaceous,

coxze ochreous. Wangs hyaline, stigma distinct but pale; mediastinal vein reaching costa

beyond middle of wing, at origin of preefurca, subcostal cross-vein placed far before its

tip; marginal cross-vein at apex of stigma; second posterior cell nearly half as long again

as its peduncle; great cross-vein carried back about 4 of the distance between the small

cross-vein and the origin of the preefurea. //alteres pale greyish. Abdomen ochreous grey

in f, blackish in 2.

Length of body 5 mm.

2 wing 5 mm.

The other (European) species is light yellow, with black tips to the femora.

Loc. Aldabra, 1 $ and 1 ? at light.

Genus TreucHoLaBis Osten-Sacken, Proc. Acad. Philad., 1859, p. 222.

16. Teucholabis flavonotata, sp. n. (Plate 10, fig. 11, wing; plate 11, fig. 7, 2

genitalia. )

Fusca, thorace flavolineato, abdomine flavonotato, femoribus fusco-annulatis ; venulis

transversis infuscatis, magn et parva lineam rectam fere formantibus, venuld transversa

marginali post apicem venze longitudinalis prime in costam inserta.

$?. Head dark; proboscis about half as long as head ; basal joint of antennze large,

flattened, ochreous. Thorax dark brown above, pleurze more chocolate-coloured ; a yellow

line at level of wing-insertion, continuous round front of mesonotum; another along the

bases of the coxze; a transverse raised yellow bar across the posterior end of the

metanotum. Legs testaceous, femora with a fuscous ring just before the apex, less

conspicuous on the front legs. Wings pale brownish, cross-veins strongly infuscated, two

206 PERCY SLADEN TRUST EXPEDITION

or three very indistinct darker clouds on the costa. Mediastinal vein reaching costa at

origin of preefurca, just before middle of wing, subcostal cross-vein near its tip; first

longitudinal vein ending in costa at about + of wing, marginal cross-vein some distance

beyond its tip; base of submarginal cell, great and small cross-veins forming one obtusely-

angulated line at about % of wing; first posterior cell contracted at apex. Halteres

yellow. Abdomen dark fuscous, with yellow lateral spots on the apices of the segments,

almost meeting in the middle; these spots are smaller and less yellow in the female.

Length of body 4 mm.

. wing 4°5 mm.

Loc. Seychelles. Mahé: forest behind Trois Fréres, 2000 ft., 2 3, 1 2.

I have seen a damaged specimen from Lake Victoria Nyanza, and specimens of a

very similar, but distinct, species from Salisbury, Mashonaland.

Genus Sryrincomyia Loew, Dipt. Beitr., 1. 6 (1845).

Idiophlebia Griinberg, Zool. Anz., xxvi. 524 (1903).

Pycnocrepis Enderlein, Zool. Jahrb., Syst., xxxii. 65 (1912).

17. Styringomyia mahensis, sp. n. (Plate 11, fig. 8, $ genitalia.)

Lutea, mesonoto nigro, antennis fusco-annulatis, pedibus annulis 4 latis nigris; alis

parum infuscatis et nigropunctatis.

$9. Head yellowish, front bristly, especially in $; palpi rather dark, the three apical

joints fuscous at their tip; second and third joints considerably widened apically.

Antenne yellowish, second joint black; joints of flagellum ovate, with whorls of

bristles about their middle, spotted with fuscous, so that the antenne have a ringed

appearance. Prothorax fuscous yellowish. Mesothorax blackish above, except for a

median yellow stripe behind the suture which extends across the scutellum ; pleuree and

sternum clear yellow-ochreous. Legs yellow, rather densely covered with long hairs, and

with scattered stronger bristles, with distinct black rings; four anterior femora with

a narrow ring beyond the middle and a broader one just before the apex; on the hind

femora the rings are similar but somewhat more conspicuous, and the anterior one is in the

middle. All tibize with a broad ring before the middle and a narrower one at the apex.

Tarsal joints blackish at the tips, and the whole of the last joint is dark (the tips of the

tarsal joints are much lighter on the hind legs). Wings slightly infuscated, especially on

the 5th longitudinal vein, with purplish reflections; a blackish spot on the small cross-

vein; the great cross-vein and the apex of the discal cell are marked with blackish, as is

the axillary vein towards its tip; this tip is bent downwards to the hind margin almost at

a right angle, and a stump of a vein arises from the angle. Halteres yellowish. Abdomen

in g testaceous with narrow fuscous bands on the apices of the segments, in $ mostly

blackish (very likely owing to discoloration) ; genital segment in both sexes yellowish.

Genitalia of $ similar to those of S. crassicosta; the large upper lobes bear four terminal-

dorsal appendages, of which the inner pair are very long, membranous, and terminated by

a long bristle; the outer pair are much shorter than the corresponding structures in

S. crassicosta, being reduced almost to tubercles, but terminated, as in S. crassicosta, by

a strong spine. Between the two large lobes, at the base, is a small unpaired structure

EDWARDS—DIPTERA, TIPULIDA 207

terminating in two spines, as in S. erassicosta. The upper lobes bear very complicated

comb-lhke appendages on their ventral side. Beneath all is a ventral plate (operculum),

which in this species is about as long as the upper lobes (excluding the terminal append-

ages); in S. crassicosta it is distinctly shorter. The operculum is trilobed, the lateral

lobes shorter and smaller than the median and much more strongly chitinised (the ¢

operculum in S. crassicosta is simple, not trilobed). The 2 operculum has the sides almost

parallel, the end slightly emarginate ; that of S. crassicosta has the sides converging and

the apical emargination rather more evident. The ? genitalia in Styringomyia seem to

be almost as complicated as those of the male; I shall not attempt to describe them

in detail here.

Length of body $7°5 mm. 5°5 mm.

A wing $5'3mm. 2? 4:2 mm.

- front leg $ 10 mm.

4 middle leg $ 8 mm.

be hind leg f 9 mm.

Loc. Seychelles. Mahé: high forest of Morne Blane and Pilot, X.-—XI. 1908,

10 4, 29.

18. Styringomyia annulipes Enderlein. (Plate 11, fig. 9, outline of 2 operculum.)

Pycnocrepis annulipes Enderlein, Zool. Jahrb., Syst., xxxii. 65 (1912).

Ochracea, thorace obscure fusco-bilineato, alis hyalinis, nigro-punctatis, pedibus obscure

4-annulatis ; antennis ex toto luteis.

$?. Very much like S. mahensis, but less yellow, and inclined to greyish ochreous.

Antenne all yellowish, second joint not darkened. Thorax brownish ochreous above, with

two darker brown rather indistinct longitudinal streaks, the median space between these

is paler ochreous. Legs with the darker rings in the same position as in S. mahensis, but

greyish and almost confined to the upper surface; hardly perceptible on the hind legs.

Last joint of tarsi blackish. Wings hyaline, spots as in S. mahensis, but smaller and less

_ pronounced. Abdomen rather lighter than in the preceding species, lower lobe of 2

genitalia almost as long as upper. In one ? (probably because not discoloured) the

abdomen is coloured as in g. The genitalia, in both sexes, are almost exactly like those

of S. mahensis, the only difference that I can see being that in S. annulipes the

$ operculum is less deeply trilobed ; this may perhaps be due to a difference in mounting.

Notwithstanding the close resemblance in structural characters between the two

species, I consider that they are well distinguished both by coloration and by the slightly

different relative length of the wings.

The writer’s determination of this species was confirmed by Dr Enderlein, who kindly

compared a specimen with his type.

Length of body $65 mm. §¢ 5°2 mm.

ie wing $4°7 mm. $¢ 4°5 mm.

Loc. Seychelles. Silhouette: plateau of Mare aux Cochons, 6 7,3. Mahé: Mare

aux Cochons, 1 ¢. Dennis Island, 2 ¢. Also Madagascar.

SECOND SERIES—ZOOLOGY, VOL. XV.

208 PERCY SLADEN TRUST EXPEDITION

This is a strikingly isolated genus, more so perhaps than any other in the Limnobina

anomala (=Rhamphidine of Kertesz). The insects with their short antennz and legs,

rather long and narrow wings, and elongated abdomens, look more like Chironomide than

Limnobiidz ; the resemblance may be only superficial, or may indicate an ancestral con-

nection with that family. Brunetti (Rec. Ind. Mus. vi. 1911, p. 297) places the genus

in the Eriopterini between Mongoma and Gonomyia; I cannot follow him in this, as

I consider Styringomyia is much more nearly related to Teucholabis and Paratropesa.

Styringomyia seems to occur throughout the Ethiopian, Oriental and Australasian

regions. The first recent species described was S. didyma Grimshaw, from the Sandwich

Islands. This has since been recorded from the Caroline Islands (as [diophlebia pallida),

Semarang, Batavia, Pasuruan, and Queensland. The second species, S. (Idiophlebia)

crassicosta Speiser, was described from Kamerun ; it is widely distributed in Africa ; the

British Museum possesses specimens from N. Nigeria, Gold Coast, Mashonaland, Natal,

Brit. E. Africa and Delagoa Bay; I have also seen it from the Cape of Good Hope;

Mr C. P. Alexander redescribes it (Can. Ent., 1912, p. 83, as S. howard?) from Queliniani,

Zambesi River. My S. ceylonica from Ceylon (also found in India and the Straits

Settlements) may be only a form of S. crassicosta, but there are slight differences

in the ¢ genitalia; it is rather surprising, considering this distribution, that it is not

the species found in the Seychelles. I should say that, through the kindness of

Prof. Sjéstedt, I have examined the type of S. crassicosta and compared it with the

British Museum specimens. It closely resembles S. seychellarum; the marked differences

in the genitalia have already been pointed out. Brunetti (Joc. cit. pp. 300, 301) describes

two species from Nepaul and 8. India. Finally, it may be mentioned that three species

(two from Africa, one from Straits Settlements) in the British Museum collection await

description.

The original description of S. venusta Loew is not full enough for a detailed compari-

son to be made, but it would seem to be distinct from any living species by the shortness

of its wings. These do not vary perceptibly in length (relatively to the length of the

body) in the Seychelles species. Loew (Bernstein und Bernsteinfauna, p. 38, 1850) men-

tions, but does not describe, another species in the name of S. gracilis.

Group Eriopterini.

Genus Ormosta Rondani, Prodr., i. 180 (1856).

Rhypholophus Kolenati, Wien. Ent. Monatschr., iv. 393 (1860).

19. Ormosia perpusilla, sp. n. (Plate 10, fig. 12, wing; plate 11, fig. 10, ¢

genitalia. )

Parva, ochracea; alis hirsutis, infuscatis, celluld.discoidali aperta ; antennis thorace

brevioribus.

$. Head brownish ochreous, antenne a little shorter than thorax, joints of flagellum

about as long as broad. Thoraw dark brown above, ochreous on pleure, without any

distinct markings. Legs brownish ochreous. Wings fuscous-tinged, rather densely hairy,

hairs on the veins, flattened and scale-like. Marginal cross-vein just before base of

EDWARDS—DIPTERA, TIPULID 209

first submarginal cell, which is about half as long as the second; second posterior cell

about half as long as third; discal cell open, coalescent with the third posterior cell.

Abdomen brownish ochreous.

?. There is a single female which most likely belongs to this species. It is darker

in colour than the males, the wings darker fuscous, and the abdomen appearing blackish.

Length of body 2°8 mm.

bs wing 3°5 mm.

- front leg 10 mm.

a middle leg 9 mm.

es hind leg 11 mm.

Loc. Seychelles. Mahé: Cascade Estate, 800—1500 ft., 1 ¢; Mare aux Cochons,

1500 ft., 1 g. Silhouette: plateau of Mare aux Cochons, 2 ¢. The single female was

from Mahé, in the high forest of Morne Blanc and Pilot. It may possibly represent

another species.

5 > 3

Genus MrsocypHona Osten-Sacken, Mon. N. Am. Dipt., iv. 152 (Hiioptera,

subgenus) (1869).

20. Mesocyphona maculosa, sp.n. (Plate 11, fig. 11, ¢ genitalia.)

Alis fuscis, guttis 5 in costa limpidis ; femoribus annulis 2 fuscis.

49. Head black, flagellum of antennze dark fuscous. Thorax ochreous above, with

a lateral dark fuscous border; pleurze greyish ochreous, with a dark fuscous longitudinal

stripe. Legs ochreous; cox dark fuscous ; trochanters ochreous fuscous, darker at the

tip ; anterior and middle femora with a fuscous ring before the middle, all femora with a

well-marked fuscous ring near the apex. Wings fuscous, darker towards the costa; four

or five rather large ochreous spots along the costa; smaller whitish ochreous spots along

the posterior and lower margins, at the terminations of the veins ; a large whitish ochreous

spot over the cross-veins, between the two largest costal spots; a similar smaller spot at

the apex of the open discal cell. First submarginal cell five-sixths as long as second ;

great cross-vein a quarter of the way along the diseal cell from the base. Abdomen

dark fuscous.

Length of body 3°5 mm.

+ wing 4 mm.

a front leg 7°5 mm.

. middle leg 6 mm.

s hind leg 8 mm.

Loc. Seychelles. Mahé: Mare aux Cochons, 1500 ft., 3 4; Caseade Estate, 800—

1500 ft., 2 ¢. Silhouette: plateau of Mare aux Cochons, 5 2, 1 2.

21. Mesocyphona albicapitella, sp. n. (Plate 10, fig. 13, wing.)

Flava, capite albo, alis hyalinis, flavescentibus.

210 PERCY SLADEN TRUST EXPEDITION

3?. Head white, eyes black, antenne pale greyish yellow, basal joint white. Thorax

yellow-ochreous, sides mostly shining milky white. Legs yellow ochreous, claws black.

Wings hyaline, veins yellow-ochreous, very hairy, especially in the apical part of the

wings. Preefurca curved at the base ; first submarginal cell two-thirds as long as second ;

second posterior cell half as long as third; discal cell open, coalescent with the third

posterior cell; great cross-vein at base of discal cell, in a line with the small cross-vein.

Halteres yellow-ochreous, the knob brownish. Abdomen yellow-ochreous.

In the ¢ from Mahé the thorax is entirely yellow-ochreous, and the abdomen is largely

blackish (perhaps discoloured by food).

Length of body 3 mm.

ii wing 3°5 mm.

-: front leg 10 mm.

a middle leg 8 mm.

A hind leg 15 mm.

Although this species shows all the principal characters of the genus, it has a very

different appearance and must belong to quite a different group from the last. It has

a remarkable external resemblance to a yellow Phlebotomus, even to the white patches on

the pleure.

Loc. Seychelles. Mahé: near Morne Blanc, X. 1901, 1 2. Silhouette: Mare aux

Cochons, IX. 1908, 1 # and 1 2 in coitu.

Genus Tasrtocera Skuse, Proc. Linn. Soc. N. 8. Wales, ser. 2, iv. 815 (1889).

22. Tasiocera minutissima, sp. n. (Plate 10, fig. 14, wing; plate 11, fig. 12, 3

genitalia.)

g. Minuta, fusca, perpilosa, antennis brevibus, flagelli articulis subeequalibus ; alis

hirtis, preefurca in cellulé submarginali aut prima aut secundé terminata.

g. Head obscure, fuscous brownish; antenne hardly as long as thorax, rather

densely clothed with long hair; joints of scape much broader than those of flagellum,

second larger than first, nearly globose; joints of flagellum nearly equal in length,

narrower towards the tip. Thoraw brownish, somewhat shining, moderately covered with

long hair. Legs fuscous, with rather long appressed hairs. Wings fuscous-tinged, all the

veins except the cross-veins densely covered with very long hair. Neuration apparently

rather variable, but typically as follows: subcostal cross-vein absent ; first and second

submarginal cells almost equal in length, preefurca arising at + the length of the wing,

ending in second submarginal cell, or sometimes apparently in first; base of first sub-

marginal cell in a line with marginal cross-vein (at least in a wing mounted in balsam),

a vein-stump extending from the junction towards the base of the wing; discal cell open

(sometimes closed ?), coalescing with second posterior cell; great cross-vein at base of

discal or second posterior cell, with it retracted some distance towards the base of the

wing. falteres hairy, fuscous, the knob somewhat darker. Abdomen with a dense

covering of long dark hairs, dull fuscous, genitalia more brownish.

EDWARDS—DIPTERA, TIPULID At 211

Length of body 1°6 mm.

Bs wing 2°3 mm.

=3 hind leg 6°5 mm.

This species seems to be intermediate between Hrioptera (sensu stricto) and Molo-

philus. At first I was inclined to place it in one of these genera, and ascertained that it

had not been described under either. But although it differs from Tasiocera in the

antennal characters, which Skuse seems to regard as some of the most important diagnostic

characters of that genus, yet it agrees very well in several important points, namely, the

complete absence of the subcostal cross-vein ; the short seventh longitudinal, which reaches

only to 4 of the wing; the position of the great cross-vein; the termination of the

preefurca in the second submarginal cell; and finally the dense hairiness and the great

length of the hair on the abdomen, wings and antenne. The eross-velns, as in the

Australian species, are very difficult to make out, even with the wing denuded of hair and

mounted in balsam. They seem, however, to be rather variable, as pointed out in the

description. Whether the preefurca ends in the first or second submarginal cell is difficult

to see without mounting the wing; in the specimen mounted (the one figured) it ended in

the second, but in other specimens I think it ends in the first.

Loc. Seychelles. Mahé: Morne Blanc, 1 ¢; Cascade Estate, 800—1500 ft., 2 3;

top of Mount Sebert, 1800 ft., 1 ¢.

Genus Moncoma Westwood, Trans. Ent. Soc. London, 1881, p. 364.

23. Mongoma pennipes Osten-Sacken, Berlin. Ent. Zeitschr., xxxi. 204 (1887).

Dr K. Griinberg kindly confirmed my identification by comparing a specimen with the

type in the Berlin Museum. The species may readily be recognised by its four posterior

cells and by its white tarsi and white-tipped tibix, the middle tibize being fringed on both

sides at the tip with white hairs.

Previously (Ann. Mag. Nat. Hist., ser. 8, viii. 1911, p. 63) I have considered that

Mongoma should be regarded as a subgenus of Trentepohlia, this latter being an older

name. Brunetti, however (Rec. Ind. Mus., vi. 1911, pp. 290—297), prefers to recognise

three allied genera forming the Mongoma group, and as these three do not apparently

intergrade it may be as well to follow him in this. His Mongomioides, however, is only

a synonym of J’rentepohlia Bigot (Ann. Soc. Ent. France, ser. 3, ii. p. 473, 1854), since

Limnobia trentepohlii Wied. is the type in each. Even if the original characterisation

were insufficient, as Brunetti claims, the writer's limitation of the subgenus T'rentepohlia

(prior to the publication of Mongomioides) would give the name a proper standing.

Meijere, on the authority of Jacobson, states that this species, like Dieranomyia

(Thrypticomyia) saltans, forms chains on web-threads. Similar habits have been observed

by Scott in Thrypticomyia scychellensis, and it is interesting to notice that all three

species have white tarsi. It is strange that the same habit should have been developed

independently in two very different genera.

Loc. Seychelles. Mahé: Cascade Estate, 800 ft. and over, 10 4, 4 @. Also Borneo,

1 ¢ (in Berlin Museum): Ceylon; Pundaluoya VI. 1889, 2 ¢ (E. KE. Green) ; hot wells at

Trincomali XI. 1891, 2 ¢ (Col. Yerbury): Semarang; Jan. and Oct. (E. Jacobson).

PERCY SLADEN TRUST EXPEDITION

Group Anisomerine.

Genus ANISOMERA Meigen, Syst. Beschr., 1. 210, xxi. (1818).

24. Anisomera luteipennis, sp. n. (Plate 10, fig. 15, wing.)

Obscure lutea, margine anticd thoracis albid&; antennis maris et feminze capite fere

duplo longioribus ; alis fusco-luteis, venuld transversi marginali ante medium pedunculi

cellulee submarginalis prime inserta.

$9. Head whitish above, palpi black ; antenne short and six-jointed in both sexes,

barely twice the length of the head, last jomt indistinctly divided into two, scape whitish,

flagellum grey. Thorax greyish brown, with a fine, rather indistinct whitish line round

the front margin and reaching back to the insertion of the wings; pleurz below this

darker ; legs testaceous, coxze more yellowish. Wings opaque, greyish brown, veins of the

ground colour ; first submarginal cell short, about half the length of its petiole, marginal

cross-vein inserted before the middle of the petiole. dbdomen greyish brown.

Length of body 5—6 mm.

A wing 5°5—6°5 mm.

Loc. Seychelles. Mahé: forest between Trois Fréres and Morne Seychellois, 1500

—2000 ft., XII. 1908, 1 ¢; Mare aux Cochons district, 1500 ft., I. 1909, 2 3, 12. Two

more males without record of exact locality.

25. Anisomera ferruginea, sp. n. (Plate 10, fig. 16, wing.)

Tota ferruginea, alis cum pedibus infuscatis ; antennis maris capite subduplo longiori-

bus; venuld transversi marginali in apicem cellule submarginalis primee inserta.

g. Head ferruginous ; eyes, palpi and flagellum of antennze black; antennze short,

barely twice as long as the head, 6-jointed. Thora ferruginous; legs black, cox ferru-

ginous, base of femora lighter. Wings smoky, somewhat narrower than in the preceding

species, veins all dark and clearly marked ; first submarginal cell as long as its petiole,

marginal cross-vein inserted at its base. Halteves dark fuscous. Abdomen entirely

ferruginous.

Length of body 4 mm.

. wing 5 mm.

This and the preceding species are the first of the genus recorded outside of Europe

and America.

Loc. Seychelles. Mahé: Mare aux Cochons, 1 3; Cascade Estate, 1 %.

There is in the British Museum a single specimen of an insect from Selangor, which

to the naked eye would easily pass as A. ferruginea, but looked at closely it is seen to

have 14-jointed antenn and only one submarginal cell. It has, however, spurred tibiz,

and only three posterior cells, as has Anisomera, and hence seems to be a species of

Cladolipes.

Genus Ertocera Macquart, Dipt. Exot., i. 74 (1838).

26. Eriocera obscuripennis, sp. n. (Plate 10, fig. 17, wing.)

Ferruginea, alis infuscatis ; stigmate nullo, cellulis posterioribus 4; antennis maris et

feminx thorace brevioribus.

EDWARDS—DIPTERA, TIPULIDA 213

49. Head ferruginous ochreous, eyes black, palpi and flagellum of antennze fuscous ;

antennee apparently 7-jointed in ¢, 9-jointed in ?. Thorax ferruginous ochreous ; legs

blackish, coxze and base of femora ochreous. Wings smoky, stigma absent; pubescence

distinct on veins and in cells towards apex ; four posterior cells, subcostal cross-vein placed

well before the apex of the auxiliary vein, marginal cross-vein inserted at the tip of the

first submarginal cell; first submarginal cell longer than its petiole; second and third

posterior cells of nearly equal width at base. Abdomen ferruginous.

Length of body 6—7 mm.

3 wing 7 mm.

Loc. Seychelles. Mahé: Cascade Estate, 1909, 1 ¢; Mare aux Cochons, 1909, 1 9.

27. Eriocera fuscinervis, sp. n. (Plate 10, fig. 18, wing.)

Ferruginea ; alis subnigris, albidovittatis, stigmate nullo, cellulis posterioribus 4.

?. Much resembles Z. obscuripennis, but easily distinguished as follows :

Pubescence of wings almost absent ; all the veins broadly infuscated, leaving whitish

spaces in the cells; second posterior cell much contracted at base.

Length of body 7 mm.

RS wing 7 mm.

These species seem to approximate to the genus Penthoptera; the difference between

the two genera is in any case slight and the genus Penthoptera is perhaps of doubtful

validity.

Loc. Seychelles. Mahé: Mare aux Cochons, I. 1909, 1 ¢.

214

Fig. 11.

Fig. 1.

Fig. 2.

Fig. 3.

Fig. 4.

Fig. 5.

Fig. 6.

Biow(

Fig. 8.

Fig. 9

Fig. 10

Fig. 11

—

SEO OC aa Cog CN CO RO

Ln ee oe ee el

9) SSE ory EM bea

PERCY SLADEN TRUST EXPEDITION

EXPLANATION OF PLATES 10 AND 11.

PLATE 10.

Dicranomyia tipulipes Karsch, wing.

Dicranomyia gardinert, sp. n., wing.

Thrypticomyia seychellensis, sp. n., wing.

Geranomyia (Monophana) immaculata, sp. n., wing.

Limnobia mahensis, sp. n., wing.

Limnobia magnicauda, sp. n., wing.

Limnobia thomasseti, sp. n., wing.

Orimarga scotti, sp. n., wing.

Orimarga fryert, sp. n., wing.

Thaumastoptera aldabrensis, sp. n., wing.

Teucholabis flavonotata, sp. n., wing.

Ormosia perpusilla, sp. n., wing.

Mesocyphona albicapitella, sp. n., wing.

Tasiocera minutissima, sp. n., wing.

Anisomera luteipennis, sp. n., wing.

Anisomera ferruginea, sp. n., wing.

Eriocera obscuripennis, sp. v., wing.

Eriocera fuscinervis, sp. n., wing.

Puate 11.

Dicranomyia tipulipes Karsch, ¢ genitalia,

Dicranomyia gardineri, sp.n., f° genitalia.

Thrypticomyia seychellensis, sp. n., genitalia.

Limnobia mahensis, sp. n., f genitalia.

Limnobia magnicauda, sp. n., f genitalia.

Limnobia thomasseti, sp.n., { genitalia.

Teucholabis flavonotata, sp. n., § genitalia.

Styringomyia mahensis, sp. n., f° genitalia, dorso-terminal view.

Styringomyia annulipes Enderlein, $, outline of operculum.

Ormosia perpusilla, sp. n., f genitalia.

Mesocyphona maculosa, sp. n., f genitalia.

Tasiocera minutissima, sp. n., f° genitalia.

Percy SLADEN TRUST EXPEDITION TRANS. LINN. Soc.,SER.2.Z00L.VoL.XV. PL. 10.

(EDWARDS)

Engel Terzi del

ERCY SLADEN TRUST EXPEDITION.

(EDWARDS)

Engel Terzidel

TIPULIDAE.

Trans. Linn. Soc.,SER.2. ZooL. VoL.XV. PL. 11

No. XV.—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA.

By Hue Scort, M.A. (Cantab.), F.LS., F.E.S.,

Curator in Entomology m the University of Cambridge.

(With Plate 12 and 1 Text-figure.)

Read June 20th, 1912.

THIS paper is an account of the Lamellicorn and Adephagous Coleoptera of the

islands of the Western Indian Ocean visited by the Perey Sladen Trust Expedition in

1905 and 1908—9; z.e. the Seychelles, the Chagos, the Amirantes, the Farquhar Group,

and Aldabra with the neighbouring islands of Astove, Assumption and Cosmoledo, It is

mainly the result of the study of the collections formed by that expedition. But

mention is also made of.those species which were found in these islands by earlier

collectors, and not by the Perey Sladen Trust Expedition; these are included in

their proper systematic position in the present paper, so that it may be a complete

list of the known fauna of the islands up to date. The total number of Lamellicornia

and Adephaga known from these islands previous to the expedition was 32 species;

this total is now increased to 55 species, and 9 of the additional 23 are new to

science,

As regards the general nature of the fauna and affinities of the species, the

Lamellicornia and Adephaga are considered separately, a brief discussion of these

matters being placed at the beginning of the account of each group, i.e. on p. 216 and

p. 239 respectively.

Literature. Certain important works, constantly required in studying the Cole-

optera of these islands, may be mentioned. These are the following :

Alluaud’s “Liste des Insectes Coléoptéres de la Région Malgache*,” being volume

xxi of Grandidier’s “ Histoire Physique, Naturelle et Politique de Madagascar” (Paris,

1900). This list gives references not only to the original descriptions of species, but

also to later notes and records of their capture within the region in question. In it are

included all the species collected in the Seychelles by Monsieur Alluaud himself in 1892,

and those found by earlier collectors. It also includes the species collected in Aldabra

and in the Seychelles in 1893 by Dr Abbott. In short, the known fauna of the islands

in question up to 1900 is included in this list.

Linell, in his paper in the ‘Proceedings of the United States National Museum,” vol.

xix (1897) p. 695, gives the original account of Dr Abbott's collections mentioned above.

Two very important papers have appeared since the publication of Alluaud’s ‘‘ Liste.”

The first is Professor Kolbe’s ‘‘ Koleopteren der Aldabra-Inseln” (Abh. Senckenb. Ges

* Tn the systematic account I have abbreviated this title to “Alluaud, Liste Coléopt.”

SECOND SERIES—ZOOLOGY, VOL. XV. 28

216 PERCY SLADEN TRUST EXPEDITION

xxvi. 1902, p. 569), which includes all the species obtained in those islands by Voeltzkow

in 1895, together with all others known therefrom up to that date. The second is the

same author’s paper on “ Die Coleopterenfauna der Seychellen” (Mitt. Zool. Mus. Berlin,

v. 1910, p. 1), giving an account of all the species found in the Seychelles by Dr Brauer,

together with those collected there by earlier investigators. Both these papers contain

important descriptions of new genera and species.

Types. As in the case of all the Entomological Collections made by the Perey

Sladen Trust Expedition, a first set of specimens including the Types of all new species

will be placed in the British Museum. A second set will be retained in the Cambridge

University Museum.

Localities. At the end of the remarks on each species is given a list of the localities

where it was found, together with dates or any further particulars when such are

recorded. In these lists, the dates “1908,” “1909,” or ‘“1908—9,” given alone (2.e. not

followed by any collector's name) in any item, always indicate that the material was

collected by myself or by some of those who helped me while I was in the Seychelles:

similarly, “1905” always indicates that it was collected by the earlier Percy Sladen

Trust Expedition in H.M.S. “Sealark”: in all other cases, the collector’s name is placed

in brackets at the end of the item. When a species is found outside the area of the

Expedition, the locality-list is followed by a brief summary of the external distri-

bution.

I desire to express my indebtedness to a number of gentlemen who have given me

very valuable assistance. Monsieur P. Lesne has very kindly compared a number of

specimens with species in the Paris Museum, and I have also to thank Dr A. Sicard for

taking several species to Paris for purposes of comparison. Herr A. Schmidt has

examined several species of Aphodiini, on the generic position of which I was unable to

decide without his assistance. Professor Kolbe has helped me in dealing with certain

Carabide, as has also Dr W. Horn in connection with the Cicindela: and Mr G. J.

Arrow has given me his aid in the determination of a number of the Lamellicornia.

Lastly I have to thank Dr Sharp for much general assistance. Several other acknow-

ledgements of help are given below in connection with particular species.

LAMELLICORNIA.

25 species of Lamellicornia are enumerated in this paper as having been found in

the various groups of islands visited by the Perey Sladen Trust Expedition in 1905 and

1908—9. 23 of these were actually obtained by the Expedition: the remaining 2 species

(Rhyssemus goudoti and Lonchotus astovensis) have been previously recorded, but were

not found by the Expedition. Previously to the Expedition, 15 species were known

from these islands: 10 are now recorded for the first time, and 5 of these are new

to science, while for one new species it has been necessary to erect a new genus

(Nesohoplia). The 25 species are representative of 19 genera. The Lucanide are

represented by 2 species of Figulus, the Scarabzeidze as follows: Aphodiini, 9 species

representing 5 genera; Orphnini, 1 species; Dynastini, 3 species representing 3 genera ;

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 217

Melolonthini, 4 species representing 3 genera; Rutelini, 2 species representing 2 genera ;

Cetoniini, 4 species representing 4 genera.

The distribution of the 25 species will be considered under two heads: firstly, the

internal distribution, or distribution among the various groups of islands within the area

of the Expedition: secondly, the external distribution, or distribution outside that area,

and the general affinities of the species.

Distribution within the area of the Expedition.

Before considering this, certain features of the various groups of islands must be

briefly recalled. The Seychelles differ from all the other groups in being very moun-

tainous islands of granitic formation, with luxuriant and highly peculiar indigenous

forests remaining in the higher parts of the mountains. All the other groups consist of

low islands of coral formation ; of them, the Chagos Group is by far the Easternmost, and

nearest to Ceylon and India; the Amirantes lie very close to the Seychelles; while the

islands of the Aldabra Group (Aldabra, Assumption, Astove, and Cosmoledo) lie farthest

to the South-West, and are distinguished from the rest by their nearness to Madagascar,

from which country also the flora of Aldabra is largely derived.

The following table is designed to show the distribution of Lamellicornia within the

area of the Expedition, 5 groups of islands having to be taken into consideration for this

purpose.

Before the names of the species :

* indicates that the species is new to science,

+ indicates that the species is recorded from these islands for the first time.

Farquhar Group (inel. | Aldabra Group (incl. Aldabra,

St Pierre and Astove, Assumption and

Providence) Cosmoledo)

Seychelles) Chagos | Amirantes |

Greup Group Group |

Figulus striatus ............

*Figulus seychellensis ......

Aphodius lividus ............

Aphodius nigritus .........

*Oxyomus palmarum.........

*Atenius lodoicex............ |

PAbeonuUs {rater .:....sc..ece5.

Saprosites laticeps .........

tSaprosites pygmeeus.........

Rhyssemus goudoti.........

}+Rhyssemus ritseme.........

Pheeocrous insularis......... —

Lonchotus astovensis ...... —

*Temnorrhynchus truncatus

Oryctes monoceros .........

*Nesohoplia senecionis ......

}Comaserica granulipennis

Perissosoma senescens ......

*Perissosoma grande .........

Parastasia coquereli.........

Adoretus versutus .........

Oxycetonia versicolor ......

Protztia aurichaleea ...... ae

MEET ETT

HTL UI

Oxythyrea aldabrensis

Mausoleopsis aldabrensis...

$33

218 PERCY SLADEN TRUST EXPEDITION

Summarizing the above: 19 species were found in the Seychelles; 12 of these were

found only in the Seychelles proper, 2 in the Seychelles and also in the Amirantes, 2 in

the Seychelles and also in the Chagos, while 1 ranges over the Seychelles, Amirantes,

Chagos, and Farquhar Groups. 7 species were found in the islands of the Aldabra Group ;

5 of these were found only in that group, 1 was found also in the Farquhar Group, and

only 1 was found both in Aldabra and in the Seychelles, and that one species is repre-

sented in the latter group by a distinct variety.

External distribution.

In discussing the affinities of the species and their distribution outside the area of

the Expedition, it is convenient to treat of them under two heads, namely (A) species

found in the Seychelles, including under this head both those occurring only in the

Seychelles and those which occur also in other groups of islands ; and (B) species found m

the Aldabra Group (including those which occur also in certain other of the islands).

A. SerycHELies. The Lamellicorn-fauna may be divided into the following classes :

(i) Endemic forms, which may be further subdivided into :

(a) species belonging to genera known only from the Seychelles : Nesohoplia

senecionis, Perissosoma enescens, Perissosoma grande ;

(b) species belonging to very widely-distributed genera, but (so far as is

known) not closely-related to their congeners in surrounding lands:

Figulus seychellensis, Oxyomus palmarum, Atenius lodoicee.

(ii) Species peculiar to the Seychelles, but representative of a widespread oriental

genus: Parastasia coquereli (closely-related to the Ceylon species Para-

stasia basalis Cand.).

(ii) Madagascar-Mascarene species: Figulus striatus (represented in Seychelles by

a distinct variety), Saprosites laticeps.

(iv) Species common to Africa and Madagascar: Aphodius nigritus, Rhyssemus

goudoti.

(v) South-Asiatic species, which extend their range also into Madagascar and the

Mascarenes: Oxycetonia versicolor, Protetia aurichaulcea.

(vi) African species (not ranging into Madagascar): Oryctes monoceros.

(vii) Very widely-spread species: Aphodius lividus (cosmopolitan), Atenius

frater (known from West Indies and Singapore), Rhyssemus ritseme

(West Africa, with a variety in the East Indies), Saprosites pygmaeus

(Malay Archipelago and Sandwich Islands), Adoretus versutus (spread over

oriental region to Fiji, and known also from St Helena).

It is important to notice that the endemic forms were for the most part found

exclusively in the native mountain-forests among the endemic vegetation: in particular

Nesohoplia senecionis, Oxyomus palmarum and Atanius lodoicee, all appear to be

specially attached to certain endemic plants (see pp. 225, 226, 232). On the other hand,

nearly all the Southern Asiatic, African, and Madagascar species, which have extended

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 219

their range not only to the Seychelles but also to some of the other archipelagoes such as

the Chagos and the Amirantes, were not found at all in the endemic forests of the

Seychelles, but only in the cultivated lower country. This is very marked in such

a case as that of the Cetoniine Protetia aurichalcea, an Indo-Cingalese species, found

also in the Mascarene Islands; it is found in low cultivated plantations in the

Seychelles, and on the low coral-islands of the Amirantes. Such a species in no way

belongs to the true endemic fauna of the Seychelles. The same statements apply to the

very widely-spread species of class (vil). This division of the Seychelles Lamellicorn-

fauna into an endemic portion confined to the endemic forests in the mountains, and a

non-endemic portion found in the lower lands, is only in accordance with the condition

of things (so far as at present known) throughout the whole of the Coleopterous fauna—

and indeed throughout many, if not all, other parts of the Insect-fauna—of the Seychelles.

Professor Kolbe has remarked on it in the introduction to his paper on “ die Coleopteren-

fauna der Seychellen” in the following words: “Gerade in den abseits gelegenen waldigen

Teilen dieser Inseln wurden von Brauer die meisten neuen Gattungen und Arten gefunden.

Im Gegensatze hierzu fanden sich die kosmopolitischen, indischen, und madagassischen

Elemente in dem kultivierten Teile der Insel Mahé*.” There are of course exceptions,

even among the Lamellicornia, to this sharp division of the faunas of the forests and

of the cultivated country. For instance the two species of Saprosites, neither of which

is endemic, occur both in the cultivated country and in the endemic forests: and the

same may be said of Figulus striatus. But on the whole the rule holds good.

It is seen then that the Lamellicorn-fauna of the Seychelles has an endemic element

consisting of species almost confined to the forests: that it has received an element from

each of the nearest large land-areas, 7.e. Africa, Madagascar, and Southern Asia: and

that it also contains a portion consisting of very widely-distributed species.

By whatever method the non-endemic forms reached the Seychelles, whether by way

of ancient land-connections or by some form of transport across the sea, at any rate

certain of them appear to have been isolated in these islands long enough to develop into

forms which are distinct, though closely related to some of their congeners. In this

connection Parastasia coquereli is particularly interesting; it has been discussed by

Professor Kolbe on p. 5 of his paper referred to above.

The genus Parastasia is represented by a number of species in the Indian region,

and extends over the East Indian Archipelago, reaching to New Caledonia and New

Zealand. P. coquereli in the Seychelles appears to be the Westernmost outpost of the

genus: it is closely-related to, but yet distinct from, P. basalis Cand., a species found in

Ceylon and India. Kolbe (/.c.) enters briefly into the question whether Parastasia

originally reached the Seychelles by immigration across the sea, or by an old land-

connection. The Madagascar-Mascarene species /igulus striatus also is represented in the

Seychelles by a distinct form, though in this case the difference appears insufficient to

justify its being designated as more than a variety.

* Mitt. Zool. Mus. Berlin, vy. 1910, p. 4. The portion cited above is followed by the statement that the

non-endemic elements form the greater part of the Seychelles fauna. Whether this latter statement will hold

true when the collections formed by the Perey Sladen Trust Expedition are fully worked out, is doubtful.

220 PERCY SLADEN TRUST EXPEDITION

Some of the very widespread species are probably either recent immigrants, or

introduced by human agency. For example, Aphodius lividus, Aphodius nigritus,

Atenws frater, and Rhyssemus ritsem@ are (as far as my experience goes) only found

in the low cultivated country, feeding on the excreta of domestic animals: but under

purely natural conditions there would have been no such excreta for them to feed on in

the islands. Adoretus versutus also is chiefly found in gardens near the coast, among rose-

bushes (on which it feeds) and other totally non-indigenous vegetation.

B. Apasra Group. The Lamellicornia consist of 7 species. Of these, Figulus

striatus is a Madagascar-Mascarene species, found also in the Seychelles, though repre-

sented there by a distinct variety; the specimens from Aldabra are of the typical

Mascarene form. Phaocrous insularis, originally described from Aldabra, has since been

recorded from Madagascar. Temnorrhynchus truncatus and Comaserica granulipennis

are both Madagascar species, the latter belonging to a genus which is confined to

Madagascar. The genus Lonchotus is also confined to Madagascar with the exception of

Lonchotus astovensis, known only from Astove Island and not (hitherto) from Madagascar

itself. Lastly, the 2 species of Cetoniini are both allied to African forms. Mauso-

leopsis aldabrensis has actually been found in Wasin Island on the coast of British East

Africa, and it is so closely related to Mausoleopsis selika Raffray that it has been con-

sidered by Kolbe to be merely a variety of that species. Oxythyrea aldabrensis is allied

to a South African species (Oxythyrea marginalis Swartz): Oxythyrea has representatives

in Madagascar, the Comoros, and Glorioso Island.

Thus, the Aldabra Lamellicorn-fauna is entirely distinct from that of the Seychelles :

its strongest affinities are with Madagascar, as might be expected from the proximity of

that country : but it contains an African element in the shape of the two Cetoniini. 3 of

the forms, however,—the two Cetoniines and the Lonchotus—are specifically distinct ; but

one of these (Mausoleopsis) is known to be not entirely confined to the Aldabra group,

while there is the possibility that the other two may be found outside those islands.

The distribution of Cetoniini among the groups of islands visited by the Expedition

is interesting. The 4 species appear to fall into two little sets of 2 species each. On the

one hand, in the Northernmost and Northeasternmost groups, the Amirantes, Seychelles,

and Chagos, are two South-Asiatic species (Oxycetonia versicolor and Protetia auri-

chalcea), which also extend into the Mascarene Islands and Madagascar. On the other

hand, in the Southwesternmost of the islands, those of the Aldabra Group, are two species

of strongly African affinities. In the Farquhar Group of islands the two sets of species

meet, for specimens of both the South-Asiatic Oxycetonia versicolor and of the African

Mausoleopsis aldabrensis have been found there.

Condition of the wings. This has been investigated in many of the species of

Lamellicornia, and in no case has any trace of reduction or atrophy of these organs been

found.

SCOTT— COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 221

Lucanide.

Ficutus MacLeay, Horae Ent., i. 1819, p. 110.

1. Figulus striatus (Olivier).

Lucanus striatus Olivier, Ent., i. 1. 1789, p. 19, Pl. IV, fig. 14.

Figulus striatus Alluaud, Liste Coléopt., p. 298; Kolbe, Mitt. Zool. Mus. Berlin, v.

1910, p. 22.

30 specimens were obtained in the Seychelles and 3 in Aldabra. I have also

examined in the British Museum some older specimens from the Seychelles, a number

from Mauritius, and 2 from Réunion. The material thus examined falls into two distinct

groups as follows:

A. Specimens from the Seychelles. The thorax is very smooth and very little

punctured. The punctures on its lateral portions are so very fine as to be hardly visible

without a high power. The median longitudinal punctured area is little impressed, and

does not reach to the anterior and posterior margins of the thorax, but is obliterated

in front over nearly 4 the length of the thorax and to a less extent behind. (The

specimens were obtained at different dates and in several different islands of the

Seychelles group.)

B. Specimens from Aldabra, Mauritius and Réunion. Lateral portions of the

thorax fairly strongly punctured, this character being specially marked in the 3 specimens

from Aldabra. Median longitudinal punctured area reaching almost if not quite to the

anterior and posterior margins ; in the specimens from Mauritius it is markedly impressed.

Punctuation of the elytral sulci slightly stronger. The specimens from Aldabra have the

head more strongly punctured.

Form A may be said to be characterised by reduction of punctuation in comparison

with form B. I have been unable to find other characters separating the two forms.

The basal part of the zdeagus* varies in breadth, but not (as far as I have seen) in such

a way as to divide form A from form B. External sexual differences are not conspicuous :

the mandibles are usually larger in the ¢, but the sexes cannot always be determined

without dissection. In both sexes the left mandible has 2 rather blunt teeth, the right

mandible only 1 (this computation includes neither the apex of the mandible nor a blunt

protuberance at its base). The wide head with its margin distinctly sinuate in front of

either eye is characteristic. The length (incl. mandibles) in my Seychelles specimens

ranges from 133 to 174 mm.: an immature specimen from Aldabra reaches only 11 mm.

* The ¢ genital apparatus in Figulus striatus possesses a long thin membranous flagellum. This is not

present in F, seychellensis, nor in some specimens from the British Museum which I refer to /. marginalis

Ritsema. Judging from this very important difference, Mr F. Muir and Dr Sharp, both of whom examined the

specimens, consider that probably the present genus Figulus should be divided. All species of the genus,

however, would have to be examined for this character before a division could be satisfactorily made; and

until this is done it seems best in a faunistic paper like the present to include both striatus and seychellensis

under the name /igulus.

222 PERCY SLADEN TRUST EXPEDITION

Loc. Seychelles. Mahé: Cascade Estate. Silhouette: from decayed outer leaf-

bases of wild palm in high forest, IX. 1908; from fallen and decayed’ branch in forest

above Mare aux Cochons, 8. IX. 1908, 1 imago, 1 pupa and several larvee; 1 ? bred

from pupa, IX. 1908; &c. Praslin: from decayed tree-stem in Coco-de-Mer forest,

Cétes d’Or Estate, 10 specimens, XI. 1908; 3 specimens, 1905. Previously found in

Mahé by Brauer (Mamelles plantation) and Alluaud.

Aldabra: Takamaka, X.—XII. 1908, 1 g, 1 9, and 1 immature specimen (Fryer).

Mauritius, Réunion, Madagascar.

2. Figulus seychellensis, sp. nov.

Sat angustus, parallelus, niger; mandibulis unidentatis; capite grosse haud profunde,

ad marginem anteriorem subtilius, punctato, in medio excavato, inter oculos postice

tuberculis 2 punctatis, antice tuberculis 2 impunctatis, margine anteriore sinuato, canthis

oculorum ante oculos distincte sinuatis ; prothorace quadrato, circa 4 latiore quam longo,

lateribus postice crenulatis, angulis anticis parum, posticis conspicue, rotundatis, antice in

medio tuberculato, disco suleo medio fortiter punctato antice abbreviato, utrinque in

medio fere impunctato sed ad latera fortiter sat dense punctato; elytris punctato-striatis,

striis internis haud fortiter punctatis, dente humerali parvo, haud prominente; tibiis

anticis ¢ et 2 similibus (? haud ad basin calcaris dilatatis). Long. corp. (cum mandib.)

9—9F mm.

A small, rather narrow, parallel-sided, shining-black form. Mandibles slightly curved,

each with one tooth on the inner margin rather near the base, and with the actual apex

blunt. The head bears 4 obsolete tubercles, 2 near the base between the eyes, and 2

impunctate ones situated just in front of the inner margin of the orbit. With the

exception of these anterior tubercles the head is punctured, the punctures being large but

shallow, and becoming much finer and closer near the anterior margin. The margin of

the ocular canthus is distinctly sinuate in front of the eye, and the posterior angle of the

canthus is very obtuse. The prothorax is a little broader than long, with the front angles

slightly and the hind angles more widely rounded off; the lateral margins bear fine

crenulations towards the hind angles; there is a small tubercle in the middle of the front

margin ; the median longitudinal impressed and punctured line does not reach quite to the

front margin ; on either side of this the inner part of the disc is smooth and bears only

extremely fine punctures, but the lateral parts are strongly punctured. The elytra are

strongly striate, but the striae (especially those near the suture) are not at all

strongly punctured; the interstices are rather flattened; the humeral angle is very

slightly toothed. The metasternum and first 4 ventral segments bear large punctures

laterally, but are smooth with only a few extremely fine punctures in the middle; 5th

ventral segment with large punctures, especially near the margin. The length (including

that of the mandibles) is from 9—9} mm. ; one specimen, bred in captivity from a larva,

is only 63mm. I have 5 specimens.

I have only been able to distinguish the sexes by dissection. In F. marginalis

Ritsema* the male has an abrupt and conspicuous semicircular dilatation on the inner

* Ritsema described /. marginalis in Notes of the Leyden Museum, vol. i. 1879, p. 189, and added a note

about the difference of the ¢ tibie in the same publication, vol. xvii. 1895—6, p. 138.

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 223

side of the anterior tibiz at the base of the spur, and the spur itself is thickened and

curved. The male is thus readily distinguished from the female; but in F. seychellensis

there is no such distinction, the tibize of the male having no dilatation and the spur being

similarly formed in both sexes.

Monsieur H. Boileau, who kindly examined specimens of F seychellensis, gave it as

his opinion that the species is new. It bears a certain resemblance to the Indo-Malayan

fF, marginalis, of which I have examined the type and another specimen. The form of

the head is however quite different; in F. marginalis the ocular canthi are scarcely

sinuate in front of the eyes, and the strie of the elytra are much more strongly

punctured : also in the specimens which I have seen, the posterior angle of the canthus is

much less obtuse and the angles of the thorax are much less rounded off. F. marginalis

also has the above-mentioned secondary sexual difference in the tibiz. Monsieur Boileau

mentions that he has two specimens of a Migulus from Benito, Portuguese Congo, which

are much more closely-allied to F. seychellensis, but at the same time quite distinct

from it.

Loc. Seychelles. Silhouette: forest above Mare aux Cochons, over 1000 ft., IX.

1908, 1 f and 1 ? from a decaying branch of “ Bois Rouge” (Wormaa ferruginea), also

a third (very small) specimen bred from a larva found in a decaying branch of the

same tree. Mahé: Cascade Estate, 800—1000 ft., I. 1909, 2 specimens (1 ? and 1 of

undetermined sex).

Scarabeide.

Aphodiini.

Apuoptus Illiger, Kiif. Preuss., 1798, p. 15.

3. Aphodius lividus (Olivier).

Scarabeus lividus Olivier, Ent., i. 3. 1789, p. 86, Pl. 26, fig. 222.

Aphodius lividus Alluaud, Liste Coléopt., p. 240; Kolbe, Mitt. Zool. Mus. Berlin, v.

1910, p. 22.

9 specimens.

Loc. Seychelles. Mahé: from low country on the main island, and from Anonyme

Island, 1908—9; cultivated country (Brauer). Previously recorded from Seychelles by

Fairmaire. Cosmopolitan.

4. Aphodius nigritus, Fabricius.

Aphodius wgritus Fabricius, Syst. Eleuth., i. 1801, p. 73; Alluaud, Liste Coléopt.,

p- 240; Kolbe, Mitt. Zool. Mus. Berlin, v. 1910, p. 22.

15 specimens.

Loc. Seychelles. Dennis Island, 1908 (Fryer): Silhouette, 1908: Félicité, from a

coconut-plantation, XII. 1908: Mahé, cultivated country on main island, 1908—9, and

Long Island, VII. 1908; cultivated country (Brauer): La Digue (Alluaud). Madagascar,

Mascarene Islands, Tropical East Africa.

SECOND SERTIES—ZOOLOGY, VOL, XV, 29

224 PERCY SLADEN TRUST EXPEDITION

Oxyomus Castelnau, Hist. Nat. Col., 11. 1840, p. 98.

5. Oxyomus palmarum, sp. nov. (Pl. 12, fig. 1, and Text-fig. 1.)

Piceus, antennis pedibusque ferrugineis, nitidus; capite antice obsolete, postice sat

dense, punctulato; prothorace dense subrugose punc-

tato; elytris longitudinaliter carinatis, carma quique

alter’ fortius, carind quaque intermedia parum,

elevata, interstitiis grosse haud profunde sculptu-

ratis. Long. corp. 3 mm.

It is very difficult either to describe or to M2

represent in a figure the remarkable sculpture of

this insect. Head slightly elevated in the middle,

rather densely punctured in the basal portion, the

c* ¢ C,

' ' 4

' f..scutellum

punctuation becoming obsolete in front. Thorax

with a very dense subrugose punctuation, a com-

pound microscope showing very fine punctures in

the spaces between the large ones; the sides are

slightly explanate towards the anterior angles,

and only a faint trace of a median longitudinal

depression is sometimes visible. The elytral sculp- Fig. 1. Diagram of elytron of Oxyomus

ture can only be properly made out if an elytron palmarum: explanation in text.

is removed and mounted separately; it will be

best understood by reference to Text-figure 1, which represents the elytron dia-

grammatically so that all parts of it are seen at once. Between the sutural and

outer margins (s and m), both of which are elevated, are four well-marked longi-

tudinal carine (c'~*); down the middle of each interval between these carine runs a

much less elevated longitudinal ridge (7~*), dividing the interval into two interstices (7) ;

each interstice is curiously sculptured, bearing a longitudinal row of shallow punctures

connected with one another by a shallow groove. Thus the elytron bears a number of

longitudinal elevations, the alternate ones being developed into strongly-marked care,

while the intermediate ones remain as the much less elevated ridges. Carine 1, 2, 3 and

4 are not continued to the apex of the elytron: near the apex the two ridges (r' and 7°),

intervening respectively between the sutural margin and carina 1, and between the outer

margin and carina 4, become themselves developed into strong apical carine (a and a’) ;

@ curves round the apex of the elytron so that it almost meets a, the two being separated

by a slight interruption at g; a’ projects so much that it renders the true margin of the

elytron very hard to see at the apex. A short carination (#) is also present near the

apex on the ridge intervening between carine 1 and 2 (7°). Elytron 1?—2 mm, long,

wing about 3 mm. long. Mesosternum closely punctate in front, the narrow part between

the middle coxe keeled. Metasternum with its central portion elevated, smooth, almost

impunctate, rather strongly impressed, sloping on either side down to the impressed

median longitudinal line; lateral parts finely subrugose. Abdominal segments smooth

with very few fine punctures, except at the base, where each has a transverse series of

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 225

large shallow punctures separated by rugze: segments 1 and 2 have a sharp median

longitudinal keel. Tarsal claws minute and equal.

The variation appears to be very slight ; two specimens are yellow instead of pitchy

owing to immaturity. O. cameratus Schmidt, of which I have seen specimens from

S. India in the British Museum, has sculpture of the same general type as, but in details

very different from, that of O. palmarum: the elytral keels of O. cameratus are all

equally developed, and special apical carinz are absent.

Loc. Seychelles. The specimens, of which I collected 106, were found only in the

endemic forests of Silhouette and Mahé, and exclusively in the moist humus between the

bases of the leaves of precinctive species of palms and Pandanus*: not between the

decayed outer leaves, but between the inner and living ones. By far the greater number

were taken from the palm Stevensonia grandifolia, 35 in one case being obtained from a

single tree : only a small number were found in the palm Verschaffeltia splendida, only 2

in a Pandanus, and none in any other kind of tree but these three kinds. Possibly the

whole life-cycle takes place in the trees, for 4 very small Lamellicorn larvze found between

leaf-bases of a growing Stevensonia in the same place and on the same day as the “ 35

specimens from a single tree,” must almost certainly belong to this species. Of the 106

specimens, 99 are from Silhouette; possibly this is due to several causes ; collecting in

Silhouette was done in the drier months of August and September, that in Mahé from

October to March. The following is a detailed list of the finds:

Silhouette: from 5 different growing Stevensonia-palms in damp forest near Mt Pot-

j-eau, 1500—2000 ft., VIII. 1908, 8 specimens; from felled Verschaffeltia in forest just

above Mare aux Cochons, 26. VIII. 1908, 1 specimen; from two heads of a growing

~ Pandanus sechellarum, forest above Mare aux Cochons, 22. IX. 1908, 2 specimens ; from

a single growing Stevensonia, same place and day as preceding, 35 specimens; from

another growing Stevensonia, same part of forest, 24. IX. 1908, 25 specimens; from

various other palms (Stevensonia or Verschaffeltia), forest above Mare aux Cochons,

28 specimens.

Mahé: from a growing Verschaffelttia near Morne Blane, about 800 ft., 19. XI. 1908,

1 specimen ; from a palm (either Stevensonia or Verschaffeltia) in Cascade forest, IT. 1909,

1 specimen ; from a large Stevensonia in Cascade forest, 29. XII. 1908, 5 specimens.

Atra&nivs Harold, Coleopt. Hefte, i. 1867, p. 100.

6. Atanius lodoicea, sp. nov. (Pl. 12, fig. 2).

Piceus, antennis pedibusque ferrugineis, subopacus ; capite dense subtiliter parum

subrugose, ad marginem anteriorem sat obsolete, punctato; prothorace dense subtiliter

parum subrugose punctato; elytro singulo 8-carinato, carinis sat elevatis, interstitiis

regulariter punctatis subtilissimeque rugulosis, ad apicem carina in interstitio externo

abrupte elevati, ultra marginem elytri prominente. Long. corp. cirea 3 mm.

Head and thorax a little shining, elytra rather dull. Head densely and finely

* For a list of the animals found between these leaf-bases see the writer’s paper in Trans. Linn. Soe.

London, Ser. 2 (Zool.), vol. x1v, 1910, pp. 24—5: and compare the case of Copelatus pandanorum, discussed on

pp. 259, 260 of the present paper.

29 9

226 PERCY SLADEN TRUST EXPEDITION

punctured, except near the front margin, where the punctuation becomes somewhat

obsolete. Thorax densely and finely punctured, a high power showing very small punctures

scattered between the larger ones; very little explanate at the sides towards the anterior

angles. The elytral sculpture is analogous to that of Oxyomus palmarum, with which it

may be compared. Each elytron has 8 longitudinal carine in addition to the elevated

sutural and outer margins: but they are only moderately elevated and almost equally

developed throughout ; only on the sloping outer part of the elytron is there a faint trace

of the alternate ridges being more elevated than those between them, a condition which

is carried to so high a pitch of development in O. palmarwm. Interstices regularly

punctured, a shallow groove running from puncture to puncture as in O. palmarum; the

surface of the interstices on either side of the punctures is minutely rugulose. Interval

between the 8th carina and the outer margin broad, corresponding to two interstices,

between which there is no definite carina except near the apex, where a sharply-elevated

apical carina is developed. This apical carina curves round the apical part of the

elytron so that it almost meets the end of carina 1 (nearest the suture), and it projects so

much as to render the true apical margin of the elytron hard to see. Carine 2—8 are of

different lengths, terminating before the apex of the elytron. Length of elytron about

13 mm., of wing about 23 mm. Mesosternum closely punctured in front, the part

between the middle cox keeled. Central part of metasternum somewhat elevated and

finely punctured, only slightly impressed in the middle, much flatter than in O. palmarum.

Abdominal segments finely punctured, Claws of tarsi minute, equal.

Loc. Seychelles. 8 specimens: 7 were found between the bases of the leaves of a

growing ¢ Coco-de-Mer palm (Lodoicea sechellarum), which was felled and examined 28.

XI. 1908, in the Coco-de-Mer forest in the Vallée de Mai, Cétes d’Or Estate: the 8th

specimen was found in the same locality on the same date, but whether from a palm-tree

is not specified.

7. Atanius frater, Arrow.

Atenius frater Arrow, Trans. Ent. Soc. London, 1903, p. 512.

This species was described from a series obtained in St Vincent and Grenada

(W. Indies). It has since been found to occur also in the East, a specimen from Singa-

pore being in the British Museum. I obtained two specimens in Mahé which agree

closely with those from the West Indies. In this species and the allied A. strigicauda

Bates a high-power lens reveals the existence of a network of extremely fine striz

between the punctures on the thorax.

Loc. Seychelles. Mahé: Cascade Estate; low country; neither specimen is from

the endemic mountain-forests. Also W. Indies and Singapore.

SaprositEs Redtenbacher, Faun. Austr., 2 ed. 1858, p. 436.

8. Saprosites laticeps (Fairmaire).

Psammodius laticeps Fairmaire, Ann. Soc. ent. France, ser. 5, 1. 1871, p. 34.

Saprosites laticeps Alluaud, Liste Coléopt., p. 241; Kolbe, Mitt. Zool. Mus. Berlin,

v. 1910, p. 22.

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 227

41 specimens. Fairmaire in the original description stated the colour to be “d'un

brun rougedtre assez brillant.” Alluaud writes of the species (Bull. Soc. Zool. France,

1898, p. 66) as “entiérement d’un noir de poix.” Almost all my specimens are shining

pitehy black, with the anterior and lateral margins of the head, the legs, antennze, and

sometimes the anterior margin of the thorax, reddish-brown: a few specimens are a little

lighter altogether, dark reddish-brown instead of black. The head is finely and evenly

punctured. The punctuation of the prothorax seen under a high power is characteristic ;

near the anterior margin it is very finely punctured, and the rest of its surface bears

strong punctures irregularly placed, with very fine punctures between them. Fairmaire

describes the prothorax as having a scarcely distinct median longitudinal furrow ; this is

only visible at all in a few of my specimens, and even then is very indistinct. Elytra

rather deeply crenate-striate. I have examined the wing in one specimen and found it to

be about 12 times as long as the elytron. Metasternum punctured at the sides, with only

extremely fine and somewhat rare punctures in the middle, and with a marked impressed

median longitudinal line; abdominal sterna each bearing a transverse series of rug at

its base, otherwise smooth with only extremely fine punctures. Length 24—3 mm.

Loc. Seychelles: all the specimens obtained by me are from Silhouette, and as in

the case of the following species, some are from the endemic mountain-forest, others from

the low plantation-country; forest above Mare aux Cochons, [X. 1909, 21 specimens: low

coconut-planted country near the coast, Pointe Etienne, 17. IX. 1908, 12 specimens: La

Digue, 1892 (Alluaud). Chagos Islands: Egmont Atoll, 1905; this is the first record

from this archipelago. Mauritius, Madagascar.

9. Saprosites pygmeus, Harold.

Saprosites pygmaeus Harold, Ann. Mus. Genova, x. 1877, p. 91: Sharp, Trans, Ent.

Soc. London, 1879, p. 91, and Fauna Hawaiiensis, iii. p. 402 (1908).

My best thanks are due to Dr R. Gestro for lending me Harold’s type of this species

from the Genoa Museum. I compared it with specimens obtained in the Seychelles, and

with 5 specimens (in the British Museum Collection) from the Hawaiian Islands,

previously determined by Dr Sharp as belonging to this species. The comparison showed

that Dr Sharp, who had not seen the type, was correct in his determination of the

Hawaiian specimens, while those from the Seychelles must also be referred to this species.

Among the 14 specimens from the Seychelles there is considerable variation in size

(length 2—24 mm.) and in colour; the latter is usually ferruginous, but in some cases the

elytra are darker, pitchy-reddish. There is also marked variation in the degree of

closeness of the thoracic punctures, though all the specimens agree in having the

punctuation evenly distributed. In most of them the elytral strize are slightly wider and

more marked than in the type, and the interstices consequently appear slightly narrower

and more convex. But I could find no character on which either to divide the Seychelles

specimens into more than one species, or to separate them from the type.

S. pygmeus is distinguished from the other Saprosites found in the Seychelles

(S. laticeps) by its smaller size, diluter colour (reddish instead of black), and by the

228 PERCY SLADEN TRUST EXPEDITION

thoracic punctuation being even, without any mingling of large and fine punctures on the

same part of the thorax.

Loc. Seychelles: from localities differing as widely as the damp endemic mountain-

forests of Mahé and the much lower and drier forest on Félicité. Mahé: high forest near

Morne Blanc, XI. 1908; high forest between Trois Fréres and Morne Seychellois 1500—

2000 ft., XII. 1908; Cascade Estate 800—1000 ft. and forest above; from between leaf-

bases of a growing Stevensona-palm on Cascade Estate at about 1000 ft., XII. 1908,

1 specimen: Praslin, Cotes d’Or Estate, XI. 1908: Félicité, 3 specimens from forest, XII.

1908. Key Islands, Malay Archipelago (the type, collected by Beccari). Hawaiian

Islands (Blackburn).

Ruyssemus Mulsant, Coléopt. de France, Lamell., 1842, p. 314.

10. Rhyssemus goudoti, Harold.

Rhyssemus goudoti Harold, Coleopt. Hefte, iv. 1868, p. 85; Alluaud, Liste Coléopt.,

p. 241; Kolbe, Mitt. Zool. Mus. Berlin, v. 1910, p. 22.

Not obtained by the Perey Sladen Trust Expeditions.

Loc. Seychelles: Mahé, 1892 (Alluaud). Madagascar, N.E. Africa, Egypt.

11. Rhyssemus ritseme, Clouét.

Rhyssemus ritseme Clouét, Mém. Soc. ent. Belgique, vii. 1901, p. 81.

Two specimens, for the identification of which I am indebted to Herr A. Schmidt.

Loc. Seychelles. Mahé: from side of road just above beach at Port Glaud, 5. XI.

1908. The species is recorded from W. Africa (Freetown), and the var. indica Clouét

from the E. Indies.

Orphnini.

Puaocrous Castelnau, Hist. Nat. Col., 1. 1840, p. 108.

12. Pheocrous insularis, Linell.

Pheocrous insularis Linell, Proc. U. 8S. Mus., xix. 1897, p. 699; Alluand, Liste

Coléopt., p. 244; Kolbe, Abh. Senckenb. Ges., xxvi. 1902, p. 575.

14 2, 15: there is considerable variation in size in both sexes, the length varying

from 7—94 mm. The thorax in this species is of the same form in both sexes, and is not

at all explanate at the sides. The swollen terminal joints of the tarsi in the # are

characteristic.

Loc. Aldabra: 1908—9 (Fryer), and 1893 (Abbott). 4% Seychelles: a single ? is

labelled “Mahé” (1905), but I doubt whether a wrong label has not been attached to it.

Madagascar: Kolbe (/.c.) had seen no specimens from Aldabra, but had seen some

collected in the N. of Madagascar by Voeltzkow which agreed with the description of

P. insularis.

———

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 229

Dynastini.

Loncuotus Burmeister, Handb., v. 1847, p. 173.

13. Lonchotus astovensis, Arrow.

Louchotus astovensis Arrow, Ann. Mag. Nat. Hist., ser. 8, vii. 1911, p. 88.

Not obtained by the Percy Sladen Trust Expeditions.

Loc. Astove Island: 2 specimens, in Brit. Mus. (R. P. Dupont).

TEMNORRHYNCUS Hope, The Col. Man., 1837, i. p. 93.

14. Temnorrhyncus truncatus (Klug).

Geotrupes truncatus Klug, Ins. Madag., Abh. Ak. Wiss. Berlin, 1832, i. p. 165.

Temnorrhyncus truncatus Alluaud, Liste Coléopt., p. 249.

There is a single specimen of this genus, a f, 12 mm. long. It is very small indeed

for T. truncatus, but by comparison with that and other species in the British Museum

I have not been able to find any structural character separating it from 7. truncatus.

The specimen is dark reddish-brown and strongly shining ; the frontal plate is transverse,

with a slight transverse carina on its lower (anterior) part, and with its upper border

rounded and bearing a very obsolete tubercle at the summit; the thorax is quite

impunctate, with a well-marked rounded median depression anteriorly (but with no

tubercle behind this depression), and with the posterior portion very slightly depressed

medially.

From its small size and general form this specimen bears a strong superficial

resemblance to the W. African 7. repandus, which species however is at once dis-

tinguished by its tall narrow frontal plate emarginate at the summit.

Loc. Assumption Island, 1909 (Dupont). Madagascar.

Oryctes Illiger, Kiif. Preuss., 1798, p. 11.

15. Oryctes monoceros (Olivier).

Scarabeus monoceros Olivier, Ent., i. 3. 1789, p. 87, Pl. 13, fig. 122.

Oryctes monoceros Alluaud, Liste Coléopt., p. 250; Linell, Proc. U.S. Mus., xix. 1897,

p- 697 ; Kolbe, Mitt. Zool. Mus. Berlin, v. 1910, p. 23.

14 males, 11 females, from cultivated places ; the larvee are found in decaying stems

of coconut-palms. This species (locally spoken of as “boeuf banane”) is stated to be

injurious both to coconut trees and bananas (see Kolbe, /.c.). There is great variation

in both sexes in actual size, in relative proportion of length to breadth, ete.

Loc. Seychelles: Mahé, Silhouette, Praslin, Dennis Island, Frigate Island (1905

and 1908—9). Amirantes: St Joseph Island, 1905. Obtained by Abbott in Mahé and

the Amirantes, and by Brauer in cultivated places in Mahé. Also Tropical Africa.

230 PERCY SLADEN TRUST EXPEDITION

Melolonthini.

NESOHOPLIA, gen. nov. (PI. 12, figs. 3—9).

é?. Corpus angustum, supra squamis elongatis angustis adpressis vestitum, Clypeus

haud attenuatus, margine anteriore fere recto. Antennz 9-articulate. Maxillz loba

superiore haud robusta, laminata, apice bidentato. Mentum elongatum, suboblongum, ad

bases palporum vix constrictum, margine anteriore haud emarginato. Prothorax antice

fortiter angustatus, angulis posticis acutis, basi medio in angulum producto. Scutellum

minimum. Abdominis segmenta ventralia haud contracta. Tibiz antics bidentate, dente

proximali fere obsoleto, dente apicali obliquo; caleare nullo. Tibize mediz posticaeque

unicalearatze, posticee haud incrassatee.

¢. Tarsi omnes unguibus 2 inzequalibus, compressis, apice fissis.

@. Tarsi antici et medii unguibus 2 ineequalibus, apice unguis externi fisso, apice

unguis interni haud fisso. [9 Tarsi postici desunt. |

Body narrow, clothed fairly densely above (clypeus excepted) with long narrow

adpressed scales.

Mentum (PI. 12, fig. 7) about 2 as broad as long, suboblong, towards the base rather

broader with sides rounded, not sharply constricted but with the sides only sinuate at the

point of insertion of the palps, the front margin sinuate but not sharply emarginate in the

middle, the anterior angles rounded and bearing hairs: apical joint of labial palpi about

twice as long as the second. Maxillee (PI. 12, tig. 6) with the upper lobe not very robust,

a subquadrate plate with two tooth-like projections at its upper and inner angle: apical joint

of maxillary palpi swollen and fusiform, nearly as long as the second and third together.

Mandibles (Pl. 12, fig. 5) with a strongly-chitinised apical tooth and a delicate inner mem-

branaceous portion. Labrum (PI. 12, fig. 4) almost horizontal, broad and short, with the

front margin slightly sinuate medially. Antenne 9-jointed, 6th joint very short ; the club

(joints 7—9) as long as joints 2—6 taken together, the lamellee of joints 7 and 9 convex

outwardly, when closed almost concealing the slightly shorter middle lamella (joint 8).

Clypeus short and somewhat broad, with its anterior margin nearly straight, not emarginate,

reflexed, the angles rounded off; its surface slightly concave, with only few very small hairs,

devoid of the conspicuous scaly covering of the rest of the head and body. Prothorax

broader than long, strongly narrowed in front, produced in the middle of the base into an

angle (covering the base of the scutellum). Scutellum very small, ovate, with apex angular.

Elytra slightly narrowed behind the middle, separately rounded at the apex. Pygidium

vertical, ventral abdominal segments not contracted in either sex. Middle and posterior

cox contiguous, the posterior transverse and projecting slightly at the sides of the abdomen.

Anterior tibize bidentate, the proximal tooth very little developed, the apical one well-

developed and oblique: apical spur absent. The middle and posterior tibize have each

a single apical spur about as long as the first tarsal joint: posterior tibia somewhat

broader than the middle ones, but not greatly swollen or thickened as in some genera.

In the ¢ all the tarsi have 2 claws, both of which are cleft at the apex, the larger one

specially broad and flattened (Pl. 12, fig. 8). I have only seen one ?, from which the

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 231

posterior tarsi unfortunately are broken off; in it the anterior and middle tarsi have each

two claws, shorter and less flattened than in the 4, the larger one rather deeply cleft, the

smaller not cleft at all (Pl. 12, fig. 9).

Type of the genus: Nesohoplia senecionis, sp. nov.

I feel doubt as to whether certain characters of this insect are to be regarded as

generic or specific; and also as to the systematic position of the genus. According to

Péringuey’s classification of the S. African Hopliini (Tr. 8. Afr. Phil. Soc. xii. 1901—2,

p. 624) it would appear to fall into the group Scelophysides. In claw-structure and some

other points it somewhat resembles Platychelus (see op. cit. pp. 798, 802), but differs from

it widely in the form of the mentum and maxillz; neither does the general form of the

body seem to approach that of Platychelus. In superficial appearance and nature of its

setose-squamose covering Nesohoplia somewhat resembles certain unnamed Hopliini from

Madagascar in the British Museum: but from these it differs absolutely in claw-structure,

etc. It does not appear to be very close to any of the various genera described from the

Madagascar region; and Dr Sicard, to whom specimens were sent, informs me that he

could find nothing like it in the collections from that region in Paris.

16. Nesohoplia senecionis, sp. nov. (Pl. 12, figs. 3—9).

$. Piceo-ferruginea vel picea, nitida, supra squamis pallide griseo-flavescentibus

sat dense vestita; capite dense subrugose punctato; prothorace circa 4 latiore quam

longo, antrorsum fortiter angustato, angulis anterioribus fere rectis, lateribus rotundatis

pone medium leviter sinuatis, angulis posticis acutis, basi medio in angulum acutum pro-

ducta, utrinque leviter bisinuata, disco sat dense haud profunde punctato; elytris dense

subrugose punctatis, setis erectis tenuibus parcis seriatim inter squamas positis. Long.

corp. 6—7 mm.

@. Major, robustior, prothorace elytrisque minus dense punctatis. Long. corp. 8 mm.

The clypeus is clearly marked off from the rest of the head ; its punctuation is slightly

different, and it is almost bare, the scales (which clothe the rest of the head, and the

prothorax and elytra) being represented on it only by very small fine hairs. The form of

the prothorax is characteristic: its front and side margins bear erect outstanding hairs.

The adpressed scales arise from the punctures, which on the thorax and elytra are fairly

dense but not deep; the punctuation of the elytra is also subrugose. The elytra are

slightly narrowed behind the middle; they bear in addition to the scales 2 or 3 rather

irregular series of a few fine erect hairs placed far apart. Wing twice as long as the

elytron. Metasternum with a slight median longitudinal depression which is absent near

the anterior margin. Pygidium bearing procumbent pale yellowish hairs, metasternum

and abdominal segments procumbent whitish or pale yellowish hairs. The tibise bear

erect yellowish hairs. The single ? is in bad condition, most of the scaly and hairy

clothing being rubbed off: it is large and dark in colour, and has the thoracic and elytral

punctuation less close than in the 7, besides differing from the ¢ in the claw-structure as

mentioned in the description of the genus.

SECOND SERIES—ZOOLOGY, VOL, XV. 30

232 PERCY SLADEN TRUST EXPEDITION

25 specimens. I frequently beat this insect from the precinctive species of bush-

groundsel Senecio sechellensis, after which I have named it.

Loc. Seychelles. Silhouette: plateau of Mare aux Cochons and near by, over

1000 ft., VITI—IX. 1908, 14 ¢ collected by Gardiner and Scott. Mahé: Cascade

Estate, about 1000 ft., XII. 1908, 1 3; near Morne Blanc, 1908, 1 f; 1 ?, 1905

(Gardiner). Also 8 other ¢ collected by J. A. de Gaye, exact locality not specified.

ComasERIcA Brenske, Berlin. Ent. Zeitschr., xliv. 1899, p. 263 (and table, p. 235 ;

also table, op. cit. xlil. 1897, p. 356).

In this genus of Sericinze, among other characters, the anterior tibie are bidentate ;

the antennz 9-jointed, with 3 lamellee in both sexes ; the mentum convexly elevated, the

convexity flattened in front; the thorax has the hind angles rounded off; the upper

surface has setiferous punctures distinct from ordinary punctures; there is no mesosternal

process between the middle coxee, and the metasternum is not impressed in the middle ;

the posterior femora are broad at their bases, narrowed towards the apex ; the posterior

tibize cut off obliquely on the inner side at the apex ; the claws of the tarsi are cleft.

The genus is well defined, and so far known only from Madagascar.

17. Comaserica granulipennis (Fairmaire).

Homaloplia granulipennis Fairmaire, Ann. Soc. ent. Belgique, xli. 1897, p. 376.

Serica granulipennis Alluaud, Liste Coléopt., p. 258.

Comaserica granulipennis Brenske, Berlin. Ent. Zeitschr., xliv. 1899, p. 266.

A series of about 34 $ and 28 ? was collected in Aldabra by Mr Fryer. Specimens

were sent to Herr Kapitiin Moser, who informed me that the species is distinct from any

in Brenske’s collection, but suggested that it might be identical with that named by

Fairmaire granulipennis and placed by him in Homaloplia. 1 therefore sent specimens to

Monsieur Lesne, who compared them with Fairmaire’s type of H. granulipennis at the

Paris Museum, and informed me that he considers them identical with that species. He

states that the only difference he was able to see lay in the size of the granules at the

bases of the setze on the elytra, which granules are larger and more marked in the type

than in the Aldabra specimens. Fairmaire described the elytra as “ parsemées de petites

soles grises trés courtes et de soies fauves plus longues et hispides.” The “hispid yellow

hairs” are obvious enough, but what is meant by the “very short little grey hairs” I do

not know; they are not present in any of the Aldabra specimens. As Fairmaire’s descrip-

tion is not very full, I subjoin the following, made entirely from the series of Aldabra

specimens before me:

Length 53—6¢ mm. ; breadth 33—44 mm. Ovate, broadening behind ; unicolorous

reddish-brown, some specimens much darker and a few paler; lamelle of antennee

testaceous, in ¢ about twice as long as joints 1—6 together, in 9 about as long. Body

dull, sometimes with pearly opalescence (but not with coppery sheen), except the clypeus

and part of the frons and the tibize and tarsi, which are shining; bearing numerous pale

yellowish sete erect or leaning backwards. Clypeus about % as long as its breadth at the

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 233

base; anterior margin only about 4 as broad as the base, reflexed, straight or slightly sinuate

in the middle, the angles and sides rounded ; surface slightly elevated in the middle, densely

and rather coarsely punctured with some setiferous punctures. Frons just above the

suture shining, and with a group of strong setiferous punctures on either side ; upper part

of head dull and more finely punctured. Prothorax over 13 times as broad as long, rather

narrowed in front, finely margined, the sides rounded and hind angles rounded right off,

the base sinuate on either side of the middle and the median portion margined with

closely-placed minute hairs; surface finely punctured, distinct setiferous punctures

numerous, especially along the front and side margins, sete along the side margins

specially conspicuous and outstanding. Scutellum with punctures bearing small hairs.

Elytra at the base about as broad as the thorax, behind the middle about 13 times as

broad as the thorax ; striz rather broad, alternate ridges a little more elevated, but none

of the ridges are sharply defined or more than slightly elevated. Ridges impunctate, but

striz bearing numerous fine punctures, so that the elytron as a whole appears densely

punctured ; setiferous punctures forming a regular series along the inner edge of each stria,

placed rather close together in the series and each having a little granule or prominence in

front of it. Apical angle of each elytron bearing a small group of sete. Pygidium

bearing numerous sete, larger and smaller; its sides strongly converging, apex sub-

truncate. Hind coxee bearing long setz near the base, hind femora bearing short setze on

the surface and a rather close series along the hind margin. Abdominal segments each

with two irregular transverse rows of setz. Ist joint of hind tarsus a little shorter than

joints 2 and 8 together; inner apical spur of hind tibia situated further forward than the

base of the tarsus, over $ as long as the Ist tarsal joint.

Loc. Aldabra: Takamaka, XI. and XII. 1908; some are recorded as having come to

light (Fryer). Madagascar: Diego Suarez.

Prrissosoma Waterhouse, Ann. Mag. Nat. Hist., ser. 4, xv. 1875, p. 409.

18. Perissosoma enescens, Waterhouse.

Perissosoma enescens Waterhouse, op. cit. p. 410; Alluaud, Liste Coléopt., p. 269 ;

Linell, Proc. U. 8. Mus., xix. 1897, p. 703; Kolbe, Mitt. Zool. Mus. Berlin, v. 1910, p. 22.

Perissosoma tenuitarse Fairmaire, Bull. Soc. ent. France, 1895, p. eclxxvi; Alluaud,

loc. cit.; Kolbe, loc. cit.

67 specimens, all males; they agree closely with specimens of P. @nescens in the

British Museum. Examples were sent to Dr A, Sicard, who compared them with speci-

mens of P. tenuitarse at Paris; he informs me that the two species are identical, and

therefore the name tenuitarse must give way to @nescens, Fairmaire stated that the club

of the antenna of the 2? P. tenwitarse is formed of 3 lamellz ; but Waterhouse describes

the club of the antenna of the 2 P. enescens as being composed of 4 lamelle, which it

certainly is in the British Museum specimens, and in my specimens, all of which I have

examined. It appears therefore that Fairmaire was mistaken as to the number of

lamellee.

I have seen no female of this species. Fairmaire describes the ? of P. tenwitarse as

30—2

234 PERCY SLADEN TRUST EXPEDITION

“magis crassa, elytris piceis, sat fortiter punctatis, suturd valde elevata, utrinque costis

2 sat elevatis,” and states that it differs much from the $, and has the club of the antenna

composed of 5 lamellee.

There is slight variation in size ete. in the series. Length varies from 9—11 mm.

Some specimens are shining black, others are more bronze-coloured, in a few the elytra are

pitchy-ferruginous : all are strongly shining with a brassy lustre. I have measured the

wings and elytra in 3 specimens and found the length of the former averaging about twice

that of the latter.

Loc. Seychelles. Mahé: various localities, mostly about 1000 feet, X. 1908—

II. 1909. I first met with this species on Oct. 17th, 1908, at an elevation of about

1000 ft., while descending the road from Capucin to Port Victoria; over a large part of

the way specimens were flying rapidly, low over the road, occasionally settling on the

scented lemon-grass planted by the wayside; the afternoon was dull and extremely damp

after much heavy rain. Some of the specimens were obtained earlier, 1905—1907

(Thomasset, Gardiner, de Gaye). The species was previously taken in Mahé by Alluaud ~

and P. Wright. According to Linell (/. ¢.) it was found in Glorioso Island by Abbott.

19. Perissosoma grande, sp. nov.

g. Piceo-ferrugineum, eenescens, nitidum; P. enescente multo majus, latius, minus

depressum ; capite crebrius punctato, antice minus impresso, vertice unituberculato, clypeo

antice magis rotundato; antennarum clavis 3-lamellatis; thorace subtilius punctato,

lateribus medio magis rotundatis ; elytris fortius punctatis. Long. corp. 11¢—13 mm.

Distinguishable at once from P. @nescens ~ by its much greater size, much less

depressed form, and greater proportionate breadth ; by the clubs of the antennz being

composed of 3 instead of 4 lamellze ; by the head being much less strongly impressed, with

its front margin more rounded, and by its possessing a small but quite distinct tubercle on

the vertex.

The colour is brownish-bronze, as opposed to the blackish-bronze of P. @nescens.

Clypeus densely punctate, its punctuation rather subrugose ; the line of division between

it and the frons distinct. Rest of the head fairly strongly punctate, the punctuation

becoming finer on the posterior part. Thorax very finely punctured, its sides more

rounded and less nearly subangulate in the middle than in P. @nescens. Elytra propor-

tionately shorter than in P. e@nescens: as in that species, each has a distinct stria near

the suture, the space between it and the suture being impunctate ; the remainder of the

elytron is rather irregularly striate-punctate, with the interstices not very closely

punctate ; the punctures are all very distinct, and larger and stronger than in P. @nescens.

Wing nearly twice as long as the elytron. Pygidium more closely and finely punctured

than in the preceding species.

I have seen 3 specimens, all males. Two were obtained by our expedition, the third

was obtained earlier, by Mr R. P. Dupont, and is in the British Museum. My two

specimens differ greatly in size, but agree in all characters that separate P. grande from

P. anescens. Unfortunately only one specimen has the antennze intact, but in that one

they are quite perfect. I at first thought this must be the ¢ of P. tenwitarse Fairmaire ;

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 235

but Dr Sicard and Monsieur Alluaud, after examining specimens, both state without hesi-

tation that P. tenuitarse is identical with P. enescens, and that P. grande is new.

Loc. Seychelles. Praslin: from Coco-de-Mer Forest in the Vallée de Mai, Cétes

d’Or Estate, XI. 1908, 1 ¢ (Type) collected by R. P. Dupont. Félicité, XII. 1908, 1 ¢.

Rutelini.

Parastasta Westwood, Ann. Mag. Nat. Hist., ser. 1, viii. 1841, p. 204.

20. Parastasia coquereli, Fairmaire.

Parastasia coquereli Fairmaire, Ann. Soc. ent. France, ser. 4, vill. 1868, p. 789; Linell,

Proc. U. 8. Mus., xix. 1897, p. 696; Alluaud, Liste Coléopt., p. 269; Kolbe, Mitt. Zool.

Mus. Berlin, v. 1910, p. 23.

12 males and 2 females were obtained. There is considerable variation in the colouring

of the elytra: in most cases there is a lighter (yellowish-brown) patch at the base of the

elytron, sharply marked off from the dark remaining portion ; but in some specimens the

lighter colour is spread over almost the whole elytron. These colour-differences are not

dependent on sex. Dissection of two of the specimens with sharply-marked basal patches

has shown one to be f, the other ?; and it has also shown that the two specimens in my

series with the most uniformly light-coloured elytra are both males. The lamellze of the

antennal club are longer in the male than in the female. The thorax in the male is

broader in the basal portion and more abruptly narrowed before the middle, the sides

being subangulate at the middle, whereas in the female they are much more gradually

rounded from the posterior to the anterior angle.

Loc. Seychelles. Mahé: 2 ¢ which came to light near Morne Blanc, about

800 feet, X. 1908; 2 % from Cascade Estate, I]. 1909; 7 ¢ and 1 2 which came to

light at Port Victoria on a rainy night, II. 1909: also 1 ¢ and 1 ¢ obtained by the

“Sealark” Expedition (1905). Previously obtained in Mahé by Coquerel, Alluaud, and

Abbott, and in La Digue by Alluaud.

Aporetus Castelnau, Hist. Nat. Col., ii. 1840, p. 142.

21. Adoretus versutus, Harold (Pl. 12, figs. 10-—12).

Adoretus versutus Harold, Coleopt. Hefte, v. 1869, p. 124; Kolbe, Mitt. Zool. Mus. »

Berlin, v. 1910, p. 22.

Adoretus vestitus Boheman (nec Reiche), Eugenies Resa, ii. 1. 1858, p. 56.

Adoretus insularis Fairmaire, Ann. Soc. ent. Belg., xl. 1897, p. 105; Alluaud,

Liste Coléopt. p. 271.

I am indebted to Dr F. Ohaus for kindly determining this species ; he tells me that

the specimens which I sent to him are absolutely identical with a specimen of A. versutus

from St Helena, which is in his possession. Also Dr Sicard, who kindly compared

specimens with those in Fairmaire’s collection, informed me that they are identical with

A. insularis of that author. Therefore the name insularis must become a synonym of

versutus.

236 PERCY SLADEN TRUST EXPEDITION

I have about 22 males and 19 females from the Seychelles, and 5 females from the

Chagos. There is considerable variation: length varies from 93 mm. (an exceptionally

small ¢) to over 11 mm. The females are proportionately broader, and darker in colour.

In the g the clypeus is shorter, with its front margin more nearly straight ; in the ? it is

proportionately longer, with more rounded margin. In the ? the larger claw of the front

and middle tarsi is so slightly cleft at its apex that, unless looked at from a certain

position (PI. 12, fig. 10 a) it appears not to be cleft at all; in the ? it is distinctly cleft

(Pl. 12, fig. 11). In the ? also the larger claw of the middle tarsus has a sharp

indentation near its base (PI. 12, fig. 10). The ¢ genital apparatus is asymmetrical

(Pl. 12, fig. 12, a,b) at the apex, the left-hand piece being the larger and quite differently

formed to the right-hand one. I have dissected it out in five specimens and found it

exactly the same in all of them.

This species eats the leaves of rose-trees in the gardens at Port Victoria at night,

and can then often be attracted to a lantern and caught. I am indebted to Monsieur de

Gaye for showing me how thus to take it in numbers. Specimens numbered “207” were

obtained thus on the night of 9. IT. 1909.

Loc. Seychelles. Mahé: Port Victoria; Cascade Estate 800—1000 ft., 1 9; several

specimens, 1905: previously obtained in Mahé by Alluaud, and by Brauer (Mamelles

plantation, June—July). Silhouette, 19, VIII. 1908. Praslin, 1 ? from Coco-de-Mer

forest in Cétes d’Or Estate, XI. 1908. Feélicité, 1 ¢, XII. 1908.

Chagos Islands ; Egmont Atoll, 5 $ and 1 #, 1905.

The species was first described from St Helena. Dr Ohaus states that it occurs

throughout the Oriental Region (India, China, Samoa, Fiji, etc.) and is described under

several names. There are specimens from Mauritius in the British Museum.

[Adoretus umbrosus (Fabricius).

Melolontha wmbrosa Fabricius, Ent. Syst., i. 2. 1792, p. 169.

This species is recorded by Linell (Proc. U. 8. Mus., xix. 1897, pp. 696 and 703)

as having been obtained by Abbott in the Seychelles and in Glorioso Island. The

nomenclature of some species of Adoretus seems to be in confusion, so that there may be

some uncertainty as to which one Linell had before him. Judging, however, by informa-

tion received from Dr Ohaus, it appears unlikely that it was the true wmbrosus of

Fabricius. No other species besides A. versutus was obtained in the Seychelles by

Alluaud, Brauer, or myself. |

Cetoniini.

OxycerontA Arrow, Fauna Brit. India, Lamellicornia, part I, 1910, p. 163.

22. Ozxycetonia versicolor (Fabricius).

Cetonia versicolor Fabricius, Syst. Ent., 1775, p. 51.

Glycyphana versicolor Alluaud, Liste Coléopt., p. 293; Kolbe, Mitt. Zool. Mus.

Berlin, v. 1910, p. 23.

Oxycetonia versicolor Arrow, Fauna Brit. India, Lamellicornia, part I, 1910, p. 164.

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 237

54 specimens. 53 belong to var. d (=variegata Fabricius, or luctuosa Gory et

Percheron), that is, they are entirely black and opaque, with white markings. The

remaining 1 specimen (from Chagos Islands) belongs to var. b (=cruenta Pall.), being

opaque, and with the black replaced by red on the thorax (except for a pair of black

discoidal spots) and over all the middle part of each elytron.

Loc. Chagos Islands: Peros Banhos Atoll, 1905, many var. d and one var. 6.

Amirantes : Desroches and Poivre Islands, 1905. Coetivy, 1905. Farquhar Atoll, 1905.

Seychelles: Mahé, 1905 and 1908—9. This species was found over the whole area

visited by the Expedition, the Aldabra group excepted. In the Seychelles it is not

found in the endemic mountain-forests. Well-known from India, Madagascar, and the

Mascarene Islands ; var. d is apparently confined to Ceylon and the Madagascar area.

Protatra Burmeister, Handb. Ent., ii. 1842, p. 472.

23. Protetia aurichalcea (Fabricius).

Cetonia aurichalcea Fabricius, Syst. Ent., 1775, p. 49.

Cetonia maculata Fabricius, Spec. Ins., i. 1781, p. 58; Alluaud, Liste Coléopt., p. 294.

Protetia maculata Kolbe, Mitt. Zool. Mus. Berlin, v. 1910, p. 23.

Protetia aurichalcea Arrow, Fauna Brit. India, Lamellicornia, part I, 1910, p. 143,

Eee, fic. 7.

Loc. Amirantes: Desroches and Eagle Islands, large numbers, 1905. Seychelles :

Mahé, 1905 and 1909; Dennis Island, 1908 (Fryer); Praslin, 1 specimen, 1905; Frigate

Island, 1 specimen, 1905; Marie Anne Island, from plantation, several specimens, 2. XII.

1908 (Dupont). Not found in the endemic mountain-forests. Previously collected

in the Seychelles by Alluaud and Brauer. India, Mauritius, Réunion.

OxyTHYREA Mulsant, Coléopt. de France, Lamell., 1842, p. 572.

Leucocelis Burmeister, Handb. Ent., iii. 1842, p. 421.

It is pointed out by Arrow, in a footnote to p. 175 of the volume (1910) on

Cetoniine and Dynastine in the Fauna of British India Series, that Mulsant’s name for

this genus was published earlier in the year 1842 than that proposed by Burmeister.

24. Oxythyrea aldabrensis, Linell.

Oxythyrea aldabrensis Linell, Proc. U. S. Mus., xix. 1897, p. 700; Alluaud, Liste

Coléopt., p. 293.

Leucocelis aldabrensis Kolbe, Abh. Senckenb. Ges., xxvi. 1902, p. 575.

Linell states that this species is allied to the S. African O. marginalis Swartz. It

was discovered in Aldabra by Abbott, and subsequently found there by Voeltzkow. We

have a large series.

Loc. Aldabra: Picard Island, I. 1909 (Fryer); 1907 (Thomasset). Cosmoledo ;

several specimens, 1907 (Thomasset).

It is of interest to note that a quite distinct species, Oxythyrea abbotti Linell (op.

cit. p. 703), was discovered by Abbott in Glorioso Island.

238 PERCY SLADEN TRUST EXPEDITION

Mausoteopsis, Lansberge.

Mausoleopsis Lansberge, C. R. Soc. Ent. Belgique, 1882 (February), p. 29.

Microthyrea Kraatz, Deutsche Ent. Zeitschr., 1882 (Apri), p. 76.

In this genus there is a tubercle, bearing a spiracle, on either side of the body at the

posterior margin of the 5th ventral abdominal segment.

As pointed out by Kolbe (Stettin. Ent. Zeit., 1895, p. 287), Lansberge’s name should

be used for this genus as it was published a little before the name proposed by Kraatz.

25. Mausoleopsis aldabrensis (Linell).

Microthyrea aldabrensis Linell, Proc. U. 8. Mus., xix. 1897, p. 700; Alluaud, Liste

Coléopt., p. 293.

? Microthyrea providencie Linell, l.c. p. 705 ; Alluaud, /.c.

Elassochiton selika var. aldabrensis Kolbe, Abh. Senckenb. Ges., xxvi. 1902, p. 574.

The sexual characters in this species are very distinct. In the $ the claws of the

front tarsi are unequal, the external one much longer, somewhat contorted, and slightly

incrassate in the middle; in the hind legs, the femora are strongly curved, the tibiz

slightly inerassate with a groove on the inner surface and short apical spurs; ventral

abdominal segments 1—4 have a well-marked median group of close fine punctures; and

the pygidium has its apex truncate with rounded angles. In the ¢ the anterior tarsal

claws are equal, the posterior femora nearly straight, posterior tibize not incrassate nor

grooved, with apical spurs much longer and bigger than in the male; the ventral

segments have no median group of punctures; the pygidium has its apex rounded,

narrower.

M. aldabrensis was described from 3? from Aldabra, and M. providencie from 2%

from Providence Island. The description of the male characters of M. providencie

agrees with the male characters of specimens from Aldabra. In fact, according to the

description, M. providencie only differs from males of M. aldabrensis in having the sides

of the thorax “sinuate behind the middle” and a few punctures on the scutellum: in

some of the Aldabra males before me there is a faint trace of sinuation of the sides of the

thorax behind the middle, but I have not observed any specimens with punctures on the

scutellum. It seems extremely probable that M. providenciae is really the male of

M. aldabrensis ; this probability is heightened by the fact that M. aldabrensis appears to

be widely-spread in the coral-islands of this region, there being specimens in the British

Museum from Aldabra, Astove, and St Pierre.

Professor Kolbe treats M. aldabrensis as a variety of M. selika Raffray, which he

refers to (/.c.) under the name of the subgenus Elassochiton. Raffray’s species was

described as Oxythyrea selika, Rev. Mag. Zool., 1877, p. 332, from Zanzibar and E. Africa:

I have examined specimens of it in the British Museum. M. seluka and M. aldabrensis

are certainly distinct, though closely-allied, forms: whether the latter should be treated

as a different species or only as a variety of the former is not easy to decide. The

specimens of M. selika in the British Museum are smaller than most of the M. aldabrensis

before me, though the length of the species as given by Raffray varies considerably, and

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 239

that of the M. aldabrensis before me from 10—13mm. WM. selika has the white markings

more numerous: in it the anterior marginal spot on the elytra is divided into two, and

there are 4 small spots on the disc of the thorax, as well as the 6 large marginal ones: in

most of the M. aldabrensis these 4 small spots are absent. In M. selika the head is more

densely punctured and the smooth space on the vertex much reduced or practically

absent ; the thoracic punctures are a little more numerous; the ventral abdominal

segments have more numerous punctures in both sexes, and the close median grouping of

fine punctures in the ¢ is less marked: the pygidium is subcarinate in the middle and

slightly depressed on either side, while in M. aldabrensis the median elevation is often

slightly less marked. Alluaud in his “ Liste Coléopt.” in footnote (2) on p. 293, states

that M. aldabrensis might be a synonym of Oxythyrea clouet Blanchard: I have however

read Blanchard’s description and seen specimens agreeing with it, and have no doubt

that O. clower is absolutely distinct.

Loc. Aldabra, Astove, Assumption, Cosmoledo, St Pierre, Providence (?). About

50 specimens: Aldabra, Esprit and Picard Islands, XII. 1908 and I. 1909 (Fryer) ;

Assumption, IX. 1908 (Fryer); Aldabra and Cosmoledo, 1907 (Thomasset). The specimens

- from Astove and St Pierre, and one from Wasin Island (on the coast of Brit. E. Africa),

are in the British Museum.

ADEPHAGA.

*30 species of Adephaga are here enumerated from the islands visited by the Percy

Sladen Trust Expedition. 26 of these are actually represented in the collections formed

by the Expedition: one more (Hypolithus pavonimus) is doubtfully represented : while

the remaining 3 (Pentagonica mahena, Laccophilus addendus and Bidessus peringuey?)

were found in the islands by previous collectors, but not by the Expedition. 17 species

were previously known, so that the list is now increased by 13 species, 4 of which are new

to science. The 30 species are representative of 20 genera. The Cicindelide are repre-

sented by two distinct forms of a single species of Cicindela: the Carabide by 13 species

belonging to 10 genera: and the Dytiscidee by 16 species belonging to 9 genera.

Distribution within the area of the Expedition.

As in the case of the Lamellicornia, I have adopted the form of a table to

demonstrate the “internal” distribution of the species. I would also again refer to those

characteristics which distinguish the Seychelles from all the other islands in question, and

which were briefly mentioned on p. 217. In the following table it has been necessary

to add a special column for the island of Coetivy: this is a small low island of coral-

formation, which lies close to the South of the Seychelles, but which does not stand on

the Seychelles Bank.

* The number is actually 31, since in addition to those mentioned above, there is from Aldabra a single

specimen of a quite distinct kind of Carabide. It is, however, in such bad preservation that neither its species

nor its genus can be determined, and it is therefore left out of account in these introductory remarks.

SECOND SERIES—ZOOLOGY, VOL. XV. 31

240 PERCY SLADEN TRUST EXPEDITION

Before the names of the species:

* indicates that the species is new to science,

+ indicates that the species is recorded from these islands for the first time.

Aldabra Group (incl. Aldabra,

Astove, Assumption and

Cosmoledo)

Seychelles

Group

Chagos | Amirantes| Farquhar

Cocky, Group Group Group

Cicindela melancholica

trUlUNALIS | access ee ees =

Cicindela melancholica

seychellensis ......... —---

fOphionea sp. ..........0205 ==

+Pheropsophus humeralis

Tetragonoderus bilunatus | ———

Pentagonica mahena...... —

Chlenius bisignatus ......

Hypolithus pavoninus ... =e

Hypolithus sechellarum...

{Hypolithus pulchellus ... aS

Dioryche interpunctata... — a

Stenolophus fulvipes ...... — —

7Tachys bibulus ............ —— ==

*Tachys seychellarum ...... ~—

FAniIUS SP. ..-..cccceeecseees —

Canthydrus notula ...... —

Laccophilus posticus ...... —

Laccophilus addendus ... aa

7Hydrovatus humilis ...... —

+Bidessus thermalis......... —_—

+Bidessus capitatus......... a

*Bidessus farquharensis ... —

Bidessus peringueyi ...... —.

{Bidessusisp: ic .ccercseres. =a

Hyphydrus impressus ... —

*Copelatus gardineri ...... —

*Copelatus pandanorum ... | ——

Copelatus pulchellus ...... ——

Hydaticus leander......... — ——

Eretes sticticus ............ ——=

Cybister tripunctatus ... | —

The following facts can be summarized from the above table :

The single species of Cicindela occurs, under two slightly different fore in the

Seychelles, the Farquhar Group, and the Aldabra Group : the Seychelles form is described

for the first time in this paper, and I am obliged to refer to it the single specimen from

Farquhar, though one would rather expect specimens found in that group of islands to

belong to the form that is found in Aldabra.

9 species of Carabide have been found in the Seychelles, and 6 in Aldabra. Only

2 species (Tetragonoderus bilunatus and Tachys bibulus) have been found both in the

Seychelles and in Aldabra, and one of these (Tetragonoderus bilunatus) occurs also in

Coetivy, the Amirantes, and the Farquhar Group. 2 other of the species found in the

Seychelles (Hypolithus seychellarum and Stenolophus fulvipes) occur also in some of the

other islands, though they have not been found in the Aldabra Group: and one of the

Aldabra species (Dioryche interpunctata), though it has not been found in the Seychelles,

has yet been found in the neighbouring island of Coetivy.

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 241

No representative of either Cicindelidze or Carabidee has yet been found in the

Chagos Islands.

Only 4 species of Dytiscidee have been found in the Seychelles, while 10 species

occur in Aldabra. Not one of the 10 Aldabra species has been found in any of the other

islands. Only one of the Seychelles species has been found in any of the other islands,

namely the very wide-spread Hydaticus leander, which occurs also in Coetivy. A single

species (Bidessus farquharensis sp. noy.) has been found in the Farquhar Group, and a

single one (Bidessus thermalis) in the Chagos, the latter being the only form of Adephaga

known to occur in that group of islands.

External Distribution.

It is again convenient to consider the general distribution and affinities under two

principal heads, namely (A) the fauna of the Seychelles, and (B) the fauna of Aldabra.

To these must also be added a third head (C) including two species not known to occur

in either of those groups, but known from the Chagos and Farquhar Groups respectively.

A. SrycHeties. Cicindela melancholica is a widely distributed species, occurring

under various different forms (subspecies, varieties, etc.) in Southern Europe, Africa, and

Madagascar. The form found in the Seychelles is closely related to subsp. trilunaris

Klug, which occurs in Madagascar, East Africa, and Aldabra, and I hear from Dr W.

Horn that var. seychellensis is also related to var. perplexa Dejean, which was first

described from Réunion.

With the possible exception of Tachys seychellarum and Anallus sp., it may be said

that no truly endemic Carabide are known from the Seychelles. During the greater part

of 8 months I collected constantly, and by many and various methods, in the endemic

mountain-forests, and Carabidze seemed to be conspicuous only by their entire absence.

Those species which are found in the islands occur in the cultivated country, often near

the coast, and several of them are found in certain of the coral-islands in the same region.

3 of the species (Tetragonoderus bilunatus, Chlenius bisignatus, and Tachys bibulus) are

Madagascar-Mascarene species; one of them, Chlanius bisignatus, is stated by Professor

Kolbe (Mitt. Zool. Mus. Berlin, v. 1910, p. 17) to be closely related to certain African

Chlenii. Hypolithus seychellarum too, which occurs not only in the Seychelles but also

in the Amirantes and Farquhar Groups, is closely related to certain African and

Madagascan species. Stenolophus fulvipes has not been recorded from Madagascar, but

occurs in the Comoros and in parts of Africa as distant from one another as Mozambique

and Angola. Kolbe (op. cit. p. 18) writes that Pentagonica mahena is one of a number

of very similar species, and that the genus Pentagonica occurs in Madagascar, Africa,

South and East Asia, Australia, New Zealand, Tropical America, ete. Nothing can be

said as to the affinities of the undetermined Ophionea, or of the minute Tachys seychel-

larum, which latter is possibly indigenous and peculiar to the Seychelles. The presence

of the extremely minute, blind and wingless Anillus is most interesting, and it is to be

hoped that further material of it may be obtained, so that its species can be determined.

Species of Anillus have been discovered in variously widely-separated parts of the world,

31—2

242 PERCY SLADEN TRUST EXPEDITION

such as France and California. Certain apparently allied genera (Nesomicrops and

Macranillus) occur in the Hawaiian Islands (see Sharp, Fauna Hawaiiensis, vol. iii., part

i. 1903, pp. 286—7, etc.). The preponderance of affinities of the Seychelles Carabid-

fauna is therefore seen to be with Madagascar and Africa.

In the case of the Dytiscide, the Seychelles possess, in the 2 species of Copelatus

(C. gardinert and C. pandanorum), a truly endemic element in their fauna. Both of

these are found in the high parts of the islands. C. gardineri, which is practically the

only water-beetle found in the streams in the mountains, may possibly be related to

certain Madagascar species; but I have not been able to find any species closely related

to C. pandanorum, which is attached in a very special manner to certain endemic trees

(see p. 259*). With regard to the other two Dytiscide found in the Seychelles, Bidessus

peringueyt is an Afro-Madagascan species, while Hydaticus leander is very widely

distributed (South Europe, Africa, Syria, Madagascar).

If the Adephagan fauna of the Seychelles be compared with the Lamellicorn-fauna of

those islands (ante, p. 218), certain differences are apparent. In the Adephaga, the truly

endemic element is proportionately smaller: the relationships of the non-endemic species do

not point in so many directions, but are predominatingly Madagascan and African ; there

is no Eastern element in the Adephagan fauna such as that which is brought into the

Lamellicorn-fauna by the presence of Parastasia coquereli, nor are there any South-Asiatic

species corresponding to the two Cetoniines Oxycetonia versicolor and Protetia aurichalcea.

B. Axpasra Group. The subspecies trilunaris of Cicindelu melancholica is, as

stated above, a Madagascan and East African form. Of the 6 species of Carabidae found

in Aldabra, Pheropsophus humeralis and Tetragonoderus bilunatus (which also occurs in

the Seychelles) are Madagascar species; Tachys bibulus is known from Madagascar and

the Mascarene Islands; Hypolithus pulchellus occurs in Madagascar and in Africa,

liaving been described from the far side of that continent .(Senegal); Hypolithus

pavoninus is an East African species, while Dioryche interpunctata, which occurs also in

Coetivy Island, is widely distributed, being known from West Africa, Madagascar, the

Mascarene Islands, and the Coromandel coast of India.

Of the 10 species of Dytiscidee, 4 (Laccuphilus posticus, Laccophilus addendus,

Hydrovatus humilis and Bidessus capitatus) are Madagascar species; 2 (Hyphydrus

impressus and Copelatus pulchellus) are Afro-Madagascan, occurring in Madagascar, the

Mascarenes, and very widely separated parts of Africa; one species (Canthydrus notula)

is Tropical African, not known from Madagascar; while 2 (Hretes sticticus and Cybister

trypunctatus) are very widely spread, the former having a world-wide distribution.

The predominant Madagascan and African affinities of the Aldabra Adephagan fauna

are therefore evident.

C. There remain 2 species, both Dytiscide, which were found neither in the

Seychelles nor in the Aldabra Group. The former, Bidessus thermalis from the Chagos

Islands, is a widely distributed species, represented by various forms in Southern Europe,

North and West Africa, Egypt, Arabia, Persia, and Bengal. The other species, Bidessus

farquharensis from Farquhar, is described as a new species.

* Also cf. the bottom of p. 218.

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 243

Condition of the wings in the Carabide.

It has been possible to investigate this to some extent in 8 out of the 13 species.

One of the forms examined is the flightless Anzlus: another is Dioryche interpunctata, in

which a remarkable and apparently discontinuous variation has come to light, some of the

specimens having the wings reduced (see p. 249): with these exceptions no trace of

reduction or atrophy of wings has been discovered, and as far as can be seen the general

condition of these organs is one of full development.

The condition of the wings in this family is particularly interesting, as in some

insular faunas the Carabidz are remarkable for having a large number of flightless species.

This is especially the case in the Hawaiian Islands, for an account of the Carabid-fauna of

which I must refer to Dr Sharp’s very interesting introductory remarks on that family in

Fauna Hawaiiensis, vol. ii., part i. pp. 175—189. In almost every point, however, the

Carabid-fauna of the Seychelles stands in most marked contrast to that of the Hawaiian

Islands. In the latter, the endemic forests are tenanted by a large number (over 200

species) of Carabide, all of which, with the exception of one species, are confined to the

Archipelago ; this large number of species belongs to very few groups, presenting, to use

Dr Sharp’s phrase (op. cit. p. 177), the phenomenon of great “ taxonomic concentration ” ;

in their affinities they are almost all very isolated; while 90 per cent. of them are flightless

(op. cit. p. 178), having the wings more or less reduced. In the Seychelles, on the other

hand, the endemic forests are to all appearance devoid of Carabidze, such species as do

occur in the islands being found in the cultivated lower country: the Carabid-fauna is

small and fragmentary, consisting of a number of genera belonging to different groups and

represented each by either a single or at most by very few species: the species themselves

are not isolated in their affinities, but are either more or less widely-spread outside the

islands, or closely-allied to species found elsewhere: while, with the two exceptions

mentioned above, they appear to have their wings fully-developed.

Some of the points of difference between the Seychelles and Hawaiian faunas

mentioned above are probably not confined to the Carabidze, but will be found to apply

also to many other sections of the entomological fauna. But it should be added that in

one respect the Seychelles Carabid-tauna is not characteristic of the Coleopterous fauna of

those islands as a whole, and that is in its apparent lack of an endemic element. It can

be said fairly safely that many parts of the Seychelles Coleopterous fauna do possess such

an element, and in this respect the Seychelles Carabide are not a fair sample of the whole

Coleopterous fauna to use for purposes of comparison with other insular faunas.

Cicindelide.

CicinDELA Linnzus, Syst. Nat., i. 1735, p. 657.

26. Cicindela melancholica, Fabricius.

Cicindela melancholica Fabricius, Suppl. Ent. Syst., 1798, p. 63; Alluaud, Liste

Coléopt., p. 9.

I am indebted to Dr Walther Horn for assisting me in dealing with the varieties of

this species and their nomenclature, and for sending me specimens of several forms for

244 PERCY SLADEN TRUST EXPEDITION

comparison. The specimens obtained by the Percy Sladen Trust Expedition belong to

two forms of the species.

A. subsp. trilunaris, Klug.

Cicindela trilunaris Klug, Ins. Madag., Abh. Ak. Wiss. Berlin, 1832, i. p. 120, Pl. 1,

fon

Cicindela congrua Klug, Monatsb. Berlin Ak., 1853, p. 245.

Cicindela trilunaris var. aldabrica Kolbe, Abh. Senckenb. Ges., xxvi. 1902, p. 571.

A series of over 40 $ and over 30 9, all except 1 from Aldabra. Length varies from

94—124 mm. ‘There is much variation in the exact form of the white markings on the

elytra; in only few specimens is the transverse line completely separated from the

posterior discoidal spot ; in many the end of the line and the anterior part of the spot are

drawn out so that they almost meet; and in many specimens they are completely united.

In the single specimen (¢) from Assumption, the line and spot are quite separate, as is

also the case in 3 specimens which Dr Horn sent me for comparison, 2 from Madagascar

and 1 from German East Africa.

Loc. Aldabra: Takamaka, XI.—XII. 1908; Mr Fryer informed me that this

Cicindela swarmed at the end of November, and that specimens came to the lamp and

caught other insects which had been attracted: it was previously obtained in Aldabra by

Voeltzkow, ete. Assumption: 1 g, 1910 (Dupont). Madagascar, East Africa.

B. var. seychellensis, nov.

=tenuilineata Alluaud (nec W. Horn), Liste Coléopt., p. 9.

var. oculis valde prominentibus, prothorace brevi; colore et sculptura capitis protho-

racisque subsp. tri/unart affinis, sed prothorace distincte breviore distinguenda. Long.

corp. 9S—12 mm.

9 ¢, 11 &. Dr Horn tells me that this does not correspond exactly with any

described form of the species. Its eyes are more prominent than those of any other form.

The sculpture of the head and prothorax is very similar to that of trilwnaris Klug, and

(as Dr Horn informs me) almost identical with that of var. perplexa Dejean: that is to

say, it is considerably smoother than that of the true C. melancholica. The prothorax is

distinctly shorter and proportionately broader than that of trilunaris. In the series

before me, although the superficial resemblance between the two forms is considerable,

this distinguishing character in the form of the prothorax is constant. According to

Dr Horn, the var. perplexa sometimes has the prothorax of about the same shape as that

of var. seychellensis. The colour of seychellensis is very similar to that of trilunaris; a

coppery-brown, with metallic green on parts of the head and the margins of the prothorax

and in the punctures of the elytra. There is some variation in the white markings on the

elytra; in none of the specimens before me is the transverse line joined to the posterior

discoidal spot. In addition to specimens from Seychelles, I refer to this variety one

specimen from Farquhar Atoll, which is about 460 miles to the South and relatively

near the range of subsp. trilunaris.

Alluaud, in his List of Madagascar Coleoptera (p. 9), records the form tenuilineata

W. Horn as having been found by him in Praslin: but Dr Horn tells me that what was

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 245

really got in Praslin by Alluaud is the var. seychellensis, just described above. The real

tenuilineata W. Horn is a synonym of var. perplexa Dejean.

Loc. Seychelles: Praslin; in hot sunshine on bare red subsoil, paths behind Grande

Anse, ete., XI. 1908; 1905; previously obtained in Praslin by Alluaud: Mahé, 1909,

1 specimen. Farquhar Atoll: 1 9, 1905.

Carabide.

OpHionEA Klug, 1821.

Bedel (Bull. Soc. ent. France, p. 72, 1910) states that Casnonia Latreille and Dejean

(1822) is exactly synonymous with Ophionea Klug (1821); but that Casnoidea Castelnau

(1835) can be provisionally retained as a distinct genus, though differing from Ophionea

only in having the 4th joints of the tarsi bifid, while in Ophionea they are not bifid.

Casnoma Latreille is given by Alluaud in his Liste des Coléoptéres de la Région

Malgache, p. 38, as synonymous with Colliwris Degeer (1774), but Bedel (/.c.) considers

that Ophionea (=Casnonia) should be kept separate from Colliwris, at any rate for the

present.

27. Ophionea sp.

A single specimen belonging to a species not represented in the collections of the

British Museum or (as M. Lesne has informed me) of the Paris Museum. There are

however many described species which I have been unable to see, and I have thought it

best not to make this single specimen a new species. The following is a description :

Length 6; mm. Head and thorax strongly shining, dark blue; labrum and

mandibles dark reddish-brown, palpi testaceous, antennze with joints 1—3 and the base

of joint 4 testaceous, the rest of joint 4 and joints 5—11 darker; legs testaceous ; elytra

pitchy-brownish, testaceous at the apex, shining, with a slight metallic bluish reflection in

front. Head smooth and impunctate but with some very fine transverse striole, rhom-

boidal, the sides behind the eyes sloping in towards the neck, the hind angles rounded

off; the neck is constricted but not prolonged or excessively narrow. Thorax slightly

longer than broad, narrowed in front and with the anterior angles rounded off, somewhat

narrowed also at the base, with sides rounded and slightly sinuate before the posterior

angles, which are almost right angles; surface smooth and impunctate in front, with faint

transverse striole and a distinct median longitudinal line, rather closely and subrugosely

punctured at the base. Elytra at the base twice as wide as the base of the thorax, or

more, each with 8 striz bearing series of punctures becoming obsolete towards the apex,

and with a very short series of. punctures at the base between the suture and the first

stria; interstices smooth and flat. The elytra are nearly parallel-sided and obliquely

-subtruncate behind: I can see no trace on them of seriate tactile hairs such as are

mentioned by Bedel (op. cit. p. 71) as occurring in certain members of the genus.

Loc. Seychelles: Mahé, 1907 (Thomasset).

246 PERCY SLADEN TRUST EXPEDITION

PHEROPSOPHUS Solier, Ann. Soe. ent. France, ser. 1, ii. 1833, p. 461.

28. Pheropsophus humeralis Chaudoir, var. ?

Pheropsophus humeralis Chaudoir, Bull. Mosc., iv. 1843, p. 710; Alluaud, Liste

Coléopt., p. 51, and footnote 4.

Pheropsophus omostigma Chaudoir, Ann. Soc. ent. Belgique, xix. 1876, p. 39.

The collection contains a single specimen of a Pheropsophus from Aldabra. Monsieur

Lesne, to whom it was sent for examination, informs me that it does not appear to him to

differ from the species in the Paris Museum which bears the name of P. humeralis

Chaudoir. On the other hand I have compared it with two specimens in the British

Museum named P. humeralis Chaud., one of which, received from Oberthiir, bears his

label stating that it was compared with the Type of the species; and there are certain

differences between the Aldabra specimen and these two specimens. The Aldabra

specimen has the shoulders of the elytra slightly less prominent. It has the light-coloured

humeral mark much reduced, forming only a fine fleck. Chaudoir, however, in discussing

this species (Ann. Soc. ent. Belgique, xix. 1876, p. 39), remarks that the humeral mark

is “quelquefois presque eftacée.” The Aldabra specimen is 18 mm. long: it is rather

light im colour, decidedly lighter than the two specimens in the British Museum; the

eround-colour of the elytra is brown, not black, which agrees with Chaudoir’s statement

in the article just cited, that the “couleur du fond n’est pas noire, mais toujours brune” ;

the legs (excepting the dark marks at the apices of the femora) and light parts of the

head and underside are of a light yellowish-testaceous; the dark mark on the vertex

is strongly emarginate in front, somewhat narrower behind, and reaches back to the

anterior margin of the thorax. As there is only one specimen, and as the British Museum

specimens are not enough to indicate the extent of individual variation in the form of

the shoulders, ete., it is not easy to decide whether the Aldabra specimen should be

considered as a distinct species or as a form of P. humeralis, but I have decided to retain

it under that name. Wings can be seen under the elytra of the specimen.

Loc. Aldabra: Takamaka, 1907 (Thomasset). P. hwmeralis Chaud. is known from

Madagascar.

TETRAGONODERUS Dejean, Spec. Col., iv. 1829, p. 485.

29. Tetragonoderus bilunatus, Klug.

Tetragonoderus bilunatus Klug, Ins. Madag., Abh. Ak. Wiss. Berlin, 1832, 1. p. 135;

Alluaud, Liste Coléopt., p. 42; Kolbe, Abh. Senckenb. Ges., xxvi. 1902, p. 572, and Mitt.

Zool. Mus. Berlin, v. 1910, p. 17.

A series of about 41 3 and 32 9. I have mounted the elytra and wings of several

specimens and find the wings well-developed: a large ¢ has the elytron 32 mm. long,

wing 64 mm.; a small $ has the elytron 3 mm. long, wing 43 mm.; 3 2 have each the

elytron 3 mm. long, wing 5 mm.

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 247

Loc. Seychelles. None of the specimens were found in the mountain-forests, but

all in the low country or at the coast, frequently in bare and dry places where the subsoil

is exposed: Mahé, Silhouette, Praslin, Bird Island: previously recorded from Mahé by

Kolbe and Fairmaire. Coetivy, 1905. Farquhar Atoll, 1905. Amirantes, 1905: Eagle

and Desroches Islands. Aldabra, 1895 (Voeltzkow). Madagascar.

PentTaconica Schmidt-Gobel, Faun. Col. Birmaniz, 1846, p. 47.

30. Pentagonica mahena, Kolbe.

Pentagonica mahena Kolbe, Mitt. Zool. Mus. Berlin, v. 1910, p- 18.

No specimen of any species of this genus was obtained by the Percy Sladen Trust

Expedition.

Loc. Seychelles: Mahé (Brauer).

CuHLa&NIvSs Bonelli, Obs. ent., i. 1809, tabl. synopt.

31. Chlenius bisignatus, Dejean.

Chlenius bisignatus Dejean, Spec. Col., ii. 1826, p. 303; Alluaud, Liste Coléopt.,

p- 31; Kolbe, Mitt. Zool. Mus. Berlin, v. 1910, p. 17.

8 specimens, 4 of which have the yellow spot on the posterior part of the elytra,

while in the other 4 it is completely absent. Kolbe (/.c.) remarks that Fairmaire had

previously stated the species to be represented in the Seychelles by a form without the

yellow spot, but that the specimens obtained by Brauer possessed it. Thus, in the series

before me, the two forms are equally represented. I have examined the wings of two

specimens (one belonging to the form with a spot on the elytron, and one to that in which

it is absent), and find them 11 mm. long, while the elytron is about 7 mm, long.

Loc. Seychelles. Mahé; from the low cultivated country, various localities: pre-

viously obtained by Brauer, etc. Mascarene Islands, Comoro, Madagascar.

? HypouirHus.

Hypolithus Dejean, Spec. Col., iv. 1829, p. 166.

Of the following 3 species, the first (H. sechellarwm Kolbe) was described as a

Siopelus, and the remaining two are sometimes referred to that genus. They do not,

however, agree with the original description, nor with the type-species of Svopelus, in one

particular, namely with regard to the presence or absence of a median tooth in the

emargination of the mentum. Siopelus was described by Murray, Ann. Mag. Nat. Hist.,

ser. 3, 1859, vol. 3, pp. 27, 28. Murray gives as the first diagnostic character (on p. 27)

“mentum profunde emarginatum, sine dente”: and on p. 28, in the remarks following the

diagnosis, he again mentions that the mentum has no median tooth. I have examined in

the British Museum the original species, S. calabaricus, described by Murray (op. cit.

p- 28), and also S. venustulus, in both of which the median tooth is quite absent. Bates

also, in his description of S. ferreus from Ceylon (Ann. Mag. Nat. Hist., ser. 5, 1886,

vol. xvii. p. 76), definitely states that the mentum of that species is destitute of a median

tooth. On the other hand, a small but distinct median tooth is present in the specimens

SECOND SERTES—ZOOLOGY, VOL. XV. 32

248 PERCY SLADEN TRUST EXPEDITION

which I have before me of sechellarum Kolbe and pulchellus Dejean. It may be that later

work has shown that the presence or absence of this tooth is not a reliable generic

character, or has in some other way modified the limits of the genus Siopelus : but though

I have searched the works of several authors, I have not succeeded in finding statements

of any such modification, and therefore I do not feel justified in going contrary to

Murray’s diagnosis of Siopelus. The following species are therefore placed under Hypoli-

thus, with the reservation that this placing is intended to be only provisional.

32. Hypolithus pavoninus, Gerstaecker.

Alypolithus pavoninus Gerstaecker, Arch. Naturg., xxxiil. 1867, 1. p. 23; Kolbe, Abh.

Senckenb. Ges., xxvi. 1902, p. 572.

As stated below, I have seen no named specimen of HH. pavoninus, and it is with some

doubt that I refer to that species a single ¢ from Aldabra : its elytral sculpture is certainly

not so fine as in the typical H. sechellarwm and the elytra are a little longer.

Loc. Aldabra (Voeltzkow); 21 3, 1907 (Thomasset). German East Africa and

Mozambique.

33. Hypolithus sechellarum (Kolbe).

Stopelus sechellarum Kolbe, Mitt. Zool. Mus. Berlin, v. 1910, p. 17.

IT am much indebted to Professor Kolbe for kindly lending me a typical specimen of

this species for purposes of comparison. Previously to seeing it I had identified my series

as H. pavoninus Gerstaecker, of which I have seen no named specimen, and which seems to

be very close to sechellarum. Professor Kolbe tells me that sechellarum is distinguished

from pavoninus by the somewhat finer sculpture of its elytra, and by having the whole

body, and particularly the elytra, shorter. By comparison with the typical specimen, the

specimens from the Seychelles, the Amirantes, and Farquhar Atoll, are referred without

doubt to H. sechellarum: but I am not quite so certain about the specimens from

Coetivy, in one of which the elytral sculpture does appear slightly coarser than in the

typical specimen.

I have examined the wings of 2 specimens, a ? from Mahé and a ¢ from Coetivy, and

found them nearly twice as long as the elytra.

Loc. Seychelles: Mahé; Mamelles, June—July (Brauer) ; 4 ?, 1908—9. Amirantes:

Eagle, 1 g, 19, 1905. Farquhar Atoll: 2 3, 4 2, 1905. Coetivy: 2° 4, 2 2, 1905.

34. Hypolithus pulchellus, Dejean.

Hypolithus pulchellus Dejean, Spec. Col., iv. 1829, p. 181; Alluaud, Liste Coléopt.,

p- 34.

2 specimens ; I am indebted to Monsieur Lesne, to whom I sent one, for the identifi-

cation. Judging from Dejean’s description I think the dark bluish-green colour on the

elytra must be extended and the light testaceous colour consequently reduced in these

2 specimens (as compared with those originally described), so that the sutural and lateral

dark patches are united with one another.

Loc. Aldabra: 1907 (Thomasset). Cosmoledo: 1907 (Thomasset). Madagascar.

Africa ; originally described from Senegal.

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 249

DiorycHEe MacLeay, Annul. jav., 1825, p. 21.

35. Dioryche interpunctata (Dejean).

Platymetopus interpunctatus Dejean, Spec. Col., iv. 1829, p. 71.

Dioryche interpunctata Alluaud, Liste Coléopt., p. 35; Kolbe, Abh. Senckenb. Ges.,

XXvVi. 1902, p. 572.

8 4,89. I have made an examination of the wings in 5 $ and 5 ?, removing and

mounting these organs. In the material thus examined there are two distinct forms, one

in which the wings are considerably longer than the elytra, the other in which they are

about the same length, or only very slightly longer than, the elytra. The smaller form of

wing is also proportionately reduced in breadth : it appears to be in most respects a repro-

duction of the larger form ona smaller scale*. This dimorphism seems independent of

sex or locality ; large-winged and small-winged forms occur in both sexes ; and in the case

of Aldabra, both forms have been obtained in the same island. I can see no external

difference in the specimens corresponding to the difference in the wings. In the large-

winged forms (2 % from Coetivy, 1 ¢ and 1 ? from Aldabra), the length of the elytra

varies from 44—5 mm., that of the wings from 64—7 mm.: in the small-winged forms

(2 g and 1 ? from Cosmoledo, 3 ¢ from Aldabra) the measurements are, elytra 44—5 mm.,

wings 43—5} mm.

Loc. Aldabra: 1908—9, 3 specimens (Fryer); 1907, 8 specimens (Thomasset) ;

previously obtained by Voeltzkow in 1895. Cosmoledo: 1907, 3 specimens (‘Thomasset).

Coetivy : 1905, 2 specimens. Madagascar, Mascarene Islands, Africa (Senegal, according

to Alluaud’s “ Liste”), India (Coromandel).

STENOLOPHUS Dejean, Spec. Col., iv. 1829, p. 405.

36. Stenolophus fulvipes, Erichson.

Stenolophus fulvipes Erichson, Arch. Naturg., ix. 1843, 1. p. 216; Kolbe, Mitt. Zool.

Mus. Berlin, v. 1910, p. 18.

Anisodactylus basicollis Fairmaire, Ann. Soc. ent. France, 1892, Bulletin, p. cli;

Alluaud, Liste Coléopt., p. 35; Kolbe, op. cit. p. 17.

7 specimens, agreeing so closely with Fairmaire’s description of A. basicollis that I

have very little doubt they are the same, though I have seen no named specimen of that

species. As, however, the nature of the mouth-parts made it clear that the species is not

an Amsodactylus, I sent specimens to Professor Kolbe; he has compared them with the

type of S. fulvipes Erichson, and has informed me that they belong to that species. The

name Anisodactylus basicollis must therefore become a synonym of Stenolophus fulvipes.

I have examined the wings of the two specimens from Mahé, and find them to be about

8 mm., while the elytra are about 4 mm., long.

* Tt appears that the nervuration of the small form of wing is complete, and that all parts are present

though reduced in size. In many flightless Hawaiian Carabide, on the contrary, the nervuration is very much

reduced and the apical portion of the wing is absent; see Sharp, Fauna Hawaiiensis, vol. iii. pt. 11.,

p. 179 sqq.

$3—2

250 PERCY SLADEN TRUST EXPEDITION

Loc. Seychelles: Mahé, 1908—9, 1 specimen from the low country and a second

without record of exact locality ; previously found by Brauer and Alluaud. Amirantes:

Eagle Island, 1905. Comoros, Africa (Mozambique and Angola).

Monsieur Lesne has kindly sent me from the Paris Museum an unnamed specimen

labelled ‘‘ Madagascar, Dr Daullé, 1857”; it is slightly smaller than the other specimens

before me, its labrum is lighter (more reddish) in colour, and more transverse in form: in

other respects the specimen so closely resembles the series discussed above that I think it

must be referred to the same species, S. fulvipes.

Tacuys Schaum, Naturg. Ins. Deutschlands, i. 1860, p. 743.

37. Tachys bibulus (Coquerel).

Bembidium (Tachys) bibulum Coquerel, Ann. Soc. ent. France, ser. 4, vi. 1866, p. 313.

Tachys bibulus Alluaud, Liste Coléopt., p. 16.

4 specimens, agreeing closely with Coquerel’s description except in one point con-

cerning the colour. Coquerel in his diagnosis uses the expression “viridi-zeneum, nitidum,”

and in the description ‘d’un vert bronzé trés brillant.” The specimens before me are

shining and pitchy-blackish, not bronze-green; but in certain lights they have a slight

bronze reflection. In all other respects, in size, form of thorax and elytral striz, colour

and form of light markings on the elytra, etc., they correspond closely with Coquerel’s

description of 7. bibulus, to which species I therefore refer them.

Loc. Aldabra; 1908—9, 3 specimens (Fryer). Seychelles; Mahé, marshes on

coastal plain at Anse aux Pins, I. 1909, 1 specimen. Réunion, Mauritius, Madagascar.

38. Tachys seychellarum, sp. nov. (Pl. 12, fig. 13).

Sat latus, ovalis, levis, testaceus, capite elytrisque parum infuscatis, antennis pal-

pisque pedibusque pallidis; prothorace fortiter transverso, elytris conspicue angustiore,

postice angustato, angulis posticis fere rectis, lateribus antice angulisque anticis rotun-

datis; elytris unistriatis, stri4 (suturali) ad basin attingente, disco bipunctato, puncto

posteriore setigero. Long. corp. 14 mm.

Form rather broadly oval, smooth, impunctate, testaceous, with head and elytra

rather darker, and with antennz and legs pale. Joints of antenne short. Head with

2 setigerous punctures on either side just within the eye. Thorax narrower than elytra in

its broadest part, and conspicuously so at the base: about 13 times as broad as long,

narrowed behind with sharp posterior angles, with the sides rounded in front and the

anterior angles rounded off, with a setigerous puncture on either side-margin a little before

the middle and another at each posterior angle. Elytra rather broad, each with only one

stria (the sutural), which reaches to the base; dise with 2 punctures (about the region of

the 3rd stria, were other striz: present), one rather before the middle of the length, the

other about 4 of the length from the posterior end, the posterior one bearing a seta, the

anterior one having no seta (though it is possible this is broken off) ; a marginal puncture

at the shoulder and 2 others on the side-margin just behind the shoulder; apex of ely-

tron subtruncate, with a small seta near its outer margin. Wings present. Underside

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 251

impunctate, with a few minute hairs on the ventral segments, the terminal segment

bearing short minute hairs and 4 longer ones standing in a curved transverse line.

This species belongs to the group of very small light-coloured Tachys having only

1 stria on each elytron. I have compared it with several specimens of the S. African

species of this group: it is somewhat of the form of 7. humeralis Pér. and T. debilis Pér.,

z.e. somewhat broadly oval as compared with other narrower and more elongate species.

But 7. seychellarum is smaller, and is characterised by having its thorax much narrower

at the base than the elytra, whereas in 7. humilis and T. debilis it is not much narrower.

Loc. Seychelles. Mahé: Cascade Estate, between about 800 and 1500 ft., 1909;

1 specimen.

AnILuus, Jacquelin-Duval.

Amillus Jacquelin-Duval, Ann. Soc. ent. France, 1851, Bulletin, pp. Ixxii and Ixxiii;

Ann. Soc. ent. France, ser. 2, x. 1852, p. 220; the figures are given in vol. ix. (1851) of

the Annales, pl. 13, figs. 25—31.

A single specimen of a very minute, completely blind, and wingless Carabid was found

in Félicité Island. Unfortunately it got badly damaged, so that it is impossible to deter-

mine the species. I have mounted the specimen in balsam, and an examination of it thus

mounted, even in its fragmentary condition, has left very little doubt that it is a species

of Anillus.

It agrees with the original description and figures (referred to above) of the

genus Anillus in the following characters :—in general form; in the complete absence of

eyes and wings; in the moniliform character of the antennze; in the possession of a small

median tooth by the mentum ; in the form of the maxillary and labial palpi, in each of

which the penultimate joint is large and swollen while the terminal joint is fine and

' subulate, and in the case of the maxillary palpi short and very minute ; in the shape of

the prothorax ; and in the form of the elytra, which are elongate and subparallel, com-

pletely covering the abdomen (and, as far as can be seen, soldered along the suture and

not separately rounded at the apex). It must be mentioned, however, that :—(i) I have

been unable to examine the structure of tibize and tarsi, owing to the loss of these organs ;

(i) the nature of the balsam-mount has not allowed of the form of the mandibles being

closely examined ; (iii) the labrum appears to have its front margin only very shallowly

emarginate (in this respect seeming to be nearer to the closely-allied genus I//aphanus),

whereas the species of Anillus (A. cecus) on which the genus was founded is figured by

Jacquelin-Duval (/.c.) as having the front margin of the labrum more deeply emarginate.

But despite the defects in my comparison, and the difference in form of the labrum, the

balance of evidence is strongly in favour of referring the specimen to Anillus, and I have

little hesitation in doing so.

At first I thought that this specimen was a Scotodipnus : but it cannot belong to that

genus, as the elytra completely cover the abdomen, whereas in Scotodipnus they leave the

extremity of the abdomen uncovered, and Schaum (Naturg. Ins. Deutschlands, i. 1860,

p. 667) gives this as one of the principal characters on which he separated Scotodipnus

from Anillus. ,

252 PERCY SLADEN TRUST EXPEDITION

The occurrence of this blind and wingless genus in the Seychelles is very interesting.

It was originally described from France; several European species have been described,

and 1 from California: the allied Z/laphanus was described from Australia. The following

is a description of the specific characters of the Seychelles specimen as far as they can be

made out. .

39. Anillus sp. ?

Length, just under 1mm. Form narrow and elongate. Colour pale yellowish-

testaceous. Antenne with joints 1 and 2 large and subturbinate, joint 3 small and

subturbinate, joints 4—10 almost spherical, becoming gradually larger towards the apex of

the antenna, joint 11 subconical. Prothorax a little broader than long, narrowed behind

and subcordate, the anterior angles somewhat rounded, the posterior angles nearly right

angles : each posterior angle is seen under a high power to be slightly but quite distinctly

emarginate at the actual corner: dise of the thorax appearing smooth and impunctate, but

with very high magnification a few extremely minute punctures bearing very short setze

can be seen. Elytra slightly broader than broadest part of prothorax, with sides sub-

parallel, narrowing slightly behind : lateral margins under compound microscope seen to

be serrate, more markedly near the shoulders: surface smooth: near the lateral margins

are some large circular punctures, from the centre of each of which arises a very long and

very fine outstanding seta: there are 3 such in the humeral region and several in the

posterior part of the elytron; the longest and most conspicuous sete on each elytron are

(1) the middle of the 3 humeral, (ii) one arising about 4 the length of the elytron from its

apex, and (iii) one arising at the posterior extremity of the elytron, some distance from the

suture.

Loc. Seychelles. Félicité: from forest, 14—17. XII. 1908.

Note. Carabid. gen. et sp. indet.

A single damaged specimen: the absence of the head renders it impossible to fix the

genus with certainty, but the remainder of the insect is intact and has the appearance of

being possibly a Stenolophus. Length (without the head) 34 mm. Thorax brownish-

testaceous, considerably broader than long, slightly narrowed towards the base, with the

posterior angles obtuse and rounded ; surface impunctate in front, impressed on either side

and finely punctured at the base. Elytra at the base a little broader than the base of the

thorax, each with 8 strize continued to the apex and with a very short stria at the base

between the Ist and 2nd discal strive, and with smooth interstices: pitchy or blackish with

the Ist interstice testaceous throughout, with a testaceous vitta extending along the 6th

interstice, broadening out at the shoulder and behind the middle, and with the lateral

margin narrowly testaceous.

Loc. Aldabra (Fryer).

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 253

Dytiscide.

CantHyprRus Sharp, On Dytiscide, p. 269.

40. Canthydrus notula (Erichson).

Hydrocanthus notula Erichson, Arch. Naturg., ix. 1843, i. p. 220.

Canthydrus notula Sharp, On Dytiscide, p. 275; Kolbe, Abh. Senckenb. Ges., xxvi.

1902, p. 574.

Canthydrus biguttatus Régimbart, Mém. Soc. ent. Belgique, iv. 1895, p. 123, and Bull.

Soe. ent. France, 1900, p. 49; Alluaud, Liste Coléopt., p. 62.

Loc. Aldabra: Takamaka, several hundred specimens, 1908 (Fryer); 1895 (Voeltz-

kow). Widely distributed in Tropical Africa.

Laccopuitus Leach, Zool. Miscell., iii. 1817, p. 69.

41. Laccophilus posticus, Aubé.

Laccophilus posticus Aubé, Spec. Hydrocanthaires, 1838, p. 428; Sharp, On Dytis-

cidee, p. 809; Alluaud, Liste Coléopt., p. 64; Kolbe, Abh. Senckenb. Ges., xxvi. 1902,

p. 973.

A large series, about 66 specimens. In many specimens the undulating dark lines on

the elytra are interrupted at about 4 of the length from the apex, so that a transverse

pale mark, not reaching quite to the suture, is formed: there is considerable variation in

the development of this, in some specimens it is scarcely perceptible while in others it is

fairly conspicuous. Two ¢ in Dr Sharp’s collection (Brit. Mus.) have this pale band

very little marked. In the ¢ the abdomen is pitchy-black ventrally except at the base

and apex, where it is reddish brown: the 6th segment has its posterior margin sinuate

on either side, and is produced in the middle. In the ¢ the abdomen is much lighter in

colour ventrally, being reddish-brown throughout, only slightly darker in the middle: the

6th segment is a little less sharply produced in the middle, its posterior margin is slightly

sinuate on either side, and there is also sometimes a very small and slight sinuation in the

middle.

Loc. Aldabra: “ Wilson’s Well,” Takamaka, x. 1908 (Fryer): 1895 (Voeltzkow).

Madagascar and Mauritius.

42. Laccophilus addendus, Sharp.

Laccophilus addendus Sharp, On Dytiscidee, p. 316; Alluaud, Liste Coléopt., p. 63 ;

Kolbe, Abh. Senckenb. Ges., xxvi. 1902, p. 573.

Not obtained by the Perey Sladen Trust Expeditions.

Loc. Aldabra: 1895 (Voeltzkow). Madagascar.

Hyprovatus Motschulsky, Etud. ent., 1885, p. 82.

43. Hydrovatus humilis, Sharp.

Hydrovatus humilis Sharp, On Dytiscidee, p. 327; Régimbart, Mém. Soc. ent.

Belgique, iv. 1895, p. 107; Alluaud, Liste Coléopt., p. 60.

254 PERCY SLADEN TRUST EXPEDITION

A single specimen, which agrees with Dr Sharp’s type of H. humilis: it is darker in

colour, the elytra being so dark throughout that the suture does not appear any darker

than the rest of the surface. Régimbart (/.c.) considers H. humilis to be a variety of

H, sordidus Sharp, which is known from Egypt, Arabia &c.

Loc. Aldabra: ‘“ Wilson’s Well,” Takamaka, x. 1908 (Fryer). Madagascar.

Brvessus Sharp, On Dytiscidee, p. 344.

I. Species with a distinct sutural stria.

44. Bidessus thermalis (Germar).

Hydroporus thermalis Germar, Faun. Ins. Eur., 20. 3.

Bidessus thermalis Sharp, On Dytiscide, p. 353; Régimbart, Mém. Soe. ent.

Belgique, iv. 1895, p. 85.

11 specimens, varying in length between 1°5 and 1‘9mm. They are of a rather

small form, apparently approaching somewhat to the var. signatellus Klug. There is

some variation in colour; the dark marks at the base of the pronotum and elytra are

almost absent in some specimens; the inner dark band on the disc of the elytron is always

characteristically dilated outwards in the form of a hook at its posterior extremity and in

its anterior part is sometimes confluent with the shorter outer band, sometimes distinctly

separated from it. Ventrally the sterna and posterior coxee are ferruginous, while the

abdomen excepting at its extreme base and apex is much darker.

Loc. Chagos Islands: Diego Garcia, 1905: 8 of the specimens are labelled by T. B.

Fletcher “9. VII. 05. In stagnant pool in Barachois.” The species is known in various

forms from 8. Europe, N. and W. Africa, Egypt, Arabia, Persia, and Bengal.

45. Bidessus capitatus, Régimbart.

Bidessus capitatus Régimbart, Mém. Soc. ent. Belgique, iv. 1895, p. 83; Alluaud,

Liste Coléopt., p. 59. (PI. 12, fig. 14.)

Var.? 57 specimens from Aldabra. Length from just under 2 to 24mm. Head

and prothorax reddish-fulvous, the former infuscate behind and along the inner margins of

the eyes, the latter very narrowly darker along its front margin, broadly darkened behind

between the plice. Head with a slight transverse elevation at the base of the clypeus,

finely punctured: pronotum with fine and rather numerous punctures, stronger towards

the base: plicze oblique continued on to the elytra as slightly longer grooves. Elytra

rather densely and rather strongly punctured, with fine pubescence ; fuscous, with the

following pale (yellowish-testaceous) markings: the lateral margin, which is sometimes

divided behind the middle by an elongated dark mark and triangularly dilated at the

apex ; two longitudinal vittz on the front part of the disc, neither of them reaching the

base, the inner usually shorter and ending posteriorly before the middle of the elytron,

the outer longer and ending behind the middle of the elytron: these longitudinal pale

vittee are connected in front with one another and with the lateral margin by a transverse

pale vitta running obliquely from the shoulder to near the sutural stria. The sutural

area, between the sutural stria and the suture, is dark throughout its length: it, and

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 255

more especially the basal area, appear as the darkest parts. The light and dark areas

are not nearly as strongly contrasted as in some species, as most of the fuscous parts of

the disc are not very dark. There is some variation, but the most usual arrangement is

shown in Pl. 12, fig. 14. Ventrally the insect is black.

The specimens from which the above description is taken differ so little from

Régimbart’s description of B. capitatus, that I have very little doubt that they are a

form of that species, though I have seen no named specimens of it. The chief difference

appears to be in size: Régimbart gives the length as 13—14 mm. (slightly smaller than

B. geminodes Rég., op. cit. p. 88), whereas the specimens before me vary between just

under 2 and 24mm. (as large as, or slightly larger than, B. geminodes). Régimbart

uses the words “pedibus antennisque flavis,” while in these specimens the feet and

antennze are more reddish, or fulvous. He compares B. capitatus closely with B. gemi-

nodes: I have seen a specimen of B. genunodes (var. zanzibarensis) named by him, and

examined it side by side with specimens from the series under consideration, when some

of the differences mentioned by him as existing between the two species are apparent.

In B. geminodes there is no transverse ridge right across the head at the base of the

elypeus: the two longitudinal pale vittz on the front part of each elytron are entirely

separated from one another and from the lateral margin, whereas in B. capitatus they are

united in front to it and to one another by the oblique transverse vitta described above.

There are variations in arrangement of light and dark markings, but this last character

is maintained throughout, and it is this oblique vitta which gives to B. capitatus its

characteristic elytral pattern as contrasted with that of B. geminodes ete.

Loc. Aldabra: Takamaka, X. 1908 (Fryer). Madagascar, near Diego Suarez

(Alluaud).

46. Bidessus farquharensis, sp. nov. (Pl. 12, fig. 15).

Ovalis, sat convexus, elytrorum lateribus regulariter curvatis, nitidus, pedibus

antennisque flavis, his apice parum infuscatis; capite flavescente, postice et ad oculos

infuscato, tenuissime punctulato, utrinque ad basin clypei parum impresso ; pronoto flavo,

antice sat anguste, ad basin inter plicas late nigricante, in medio sparse, antice posticeque

erebrius punctato, punctis ad basin fortioribus, plicis obliquis in elytris breviter angulariter

continuatis; elytris sat fortiter haud dense punctatis, tenuissime pubescentibus, strid

suturali profunda ad basin fere attingente, nigricantibus, margine laterali flavo antice late,

pone medium parum, apice triangulariter dilatato, vittisque 2 longitudinalibus flavis basin

haud attingentibus et paulo ante medium abbreviatis: subtus sternis coxisque posteriori-

bus obscure rufescentibus, abdomine nigricante. Long. corp. cirea 2 mm.

Characterised by the rather convex oval form, the sides not being parallel but

curved: the thoraco-elytral angle is distinct but slight, the elytra are ampliated in their

middle part and their sides are gradually curved from base to apex. Also characterised

by the rather shining surface, the rather wide spacing-out of the elytral punctuation, and

the strong contrast of the light and dark markings, the former being yellow and the

latter almost black. There is no transverse ridge across the head at the base of the

clypeus, but only a slight depression on either side. The thoracic plicee are curved

SECOND SERIES—ZOOLOGY, VOL. XV. 33

256 PERCY SLADEN TRUST EXPEDITION

slightly inwards, and are continued on to the elytra as grooves of about the same length

as the thoracic portion. Sutural stria deep, reaching the apex, but not quite to the base.

Surface finely reticulate. Each elytron (Pl. 12, fig. 15) is almost black with the following

yellow markings: (i) the lateral margin, broadly dilated in its front part, slightly dilated

behind the middle (this second dilation being sometimes rather vaguely cut off from the

rest of the margin by a dark line), and triangularly dilated at the apex: and (ii) two

longitudinal vittee on the front part of the disc, not reaching the base and ending a little

in front of the middle, quite separated from the lateral margin by an intervening dark

area, but in one specimen confluent with each other at one point.

This species could not be identified with any in the British Museum collections, nor

does it appear to agree entirely with any of Régimbart’s descriptions. The colour-pattern

of the elytra is of a similar type to that found in several other species, though the colours

themselves may be different. This pattern is of the same type as that of B. geminodes

Rég., though that species is extremely different in form, colour, and punctuation : judging

from the description it is also similar to that of the W. African B. africanus Rég. (Mém.

Soe. ent. Belgique, iv. 1895, p. 90), but here again the colour itself of the elytra is described

as ‘‘d’un brun nébuleux,” the species is smaller, and there are probably many other

differences. In another case the figure and description (in Ann. Soc. ent. France, lxviii.

1899, p. 224) of a species from the Philippines, B. pseudogeminus Rég., show that the

pattern is the same; here too, according to the description, the colours themselves appear

to be fairly similar to those of B. farquharensis, but the form of the insect is described as

‘“oblongue, subparalléle.” All things considered I have felt it necessary to name and

describe this species, while recognising that, were it possible to see specimens of all

described species, it might prove to be a form of some one of them.

Loc. Farquhar Atoll: 5 specimens, 1905.

II. Species with no sutural stria.

47. Bidessus peringueyt, Régimbart.

Bidessus peringueyi Régimbart, Mém. Soe. ent. Belgique, iv. 1895, p. 84: Ann. Soc.

ent. France, xxv. 1906, p. 244.

Bidessus sechellensis Régimbart, Bull. Soc. ent. France, 1897, p. 208; Alluaud, Liste

Coléopt., p. 60.

B. sechellensis was described as a distinct species, but Régimbart afterwards (1906)

found it to be the same as B. peringueyi. I have examined specimens of B. peringueyi

named by Régimbart in the British Museum: it is a very small species belonging to the

group with no sutural stria, and was not obtained by the Percy Sladen Trust Expeditions.

Loc. Seychelles: La Digue, 1892 (Alluaud). Madagascar, E. and S. Africa.

48. Bidessus sp.

A single specimen of a very small species. It is quite distinct from B. peringueyt

Régimbart, being strongly punctured on the elytra. It does not appear to agree with

any species in Dr Sharp’s collection or elsewhere in the British Museum, but I am

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 257

uncertain whether it may not be referable to some species which I have not seen, and have

therefore thought it best not to describe it as new.

The length is about 15mm, Form somewhat narrow and elongate-oval, thoraco-

elytral angle slight. Shining; head, prothorax, antenne and legs reddish-testaceous ;

elytra brown, without distinct markings and almost concolorous, slightly darker at the

base and along the suture, and paler at the shoulders. Head finely punctulate with a

slight elevation on either side at the base of the clypeus; pronotum finely and not closely

punctured, the punctures stronger at the base, the plica on either side well-marked and

angular, continued on to the elytron as a groove of about the same length; elytra fairly

strongly and closely punctured, with excessively short and scanty pubescence (scarcely

visible except with a compound microscope) ; sutural stria absent, replaced by a line of

punctures. Beneath, ferruginous with posterior coxee and base of abdomen infuscate :

posterior coxze strongly but not very closely punctured.

Loc. Aldabra: ‘“ Wilson’s Well,” Takamaka, X. 1908 (Fryer).

Hypuyprus Illiger, Mag., i. 1802, p. 299.

49. Hyphydrus vmpressus, Klug.

Hyphydrus impressus Klug, Ins. Madag., Abh. Ak. Wiss. Berlin, 1832, i., p. 136;

Sharp, On Dytiscide, p. 380; Régimbart, Mém. Soc. ent. Belgique, iv. 1895, p. 57;

Alluaud, Liste Coléopt., p. 58; Kolbe, Abh. Senckenb. Ges., xxvi. 1902, p. 574.

6 specimens. There is a great development of the light markings on the elytra: this

species is very variable in that respect, a specimen from Madagascar in Dr Sharp’s collection

having the middle and posterior parts of the elytra almost entirely dark. Régimbart (J.c.)

mentions that certain specimens from Boma (Congo) were very dark, some even having

the elytra ‘‘entiérement noirs, sauf une étroite bordure humérale.”

Loc. Aldabra: ‘‘ Wilson’s Well,” Takamaka, X. 1908 (Fryer); 1895 (Voeltzkow).

Madagascar, Mascarene Islands, W. and 8. Africa.

CopEeLatus Erichson, Gen. Dytisc., 1832, p. 38.

50. Copelatus gardineri, sp. nov.

4%. Elongato-ovalis, angustus, nigro-piceus, capite prothoracisque marginibus

lateralibus rufescentibus, elytris vitté basali transversd angustd ad suturam vix interrupta

humerosque fere attingente, et maculd subapicali, testaceis; corpore subtus rufo-piceo,

antennis pedibusque testaceis plus minusve infuscatis; capite prothoraceque pertenuissime

punctulatis, hoc utrinque ad basin plus minusve obsolete striolato ; elytris pertenuissime

haud dense punctulatis, striis nullis, seriebus punctorum duabus distinctis, et duabus aliis

minus distinctis, postice serie submarginali punctorum tenuiter pubescentium. Long.

corp. 4;—53 mm.

f tibiis anticis ad basin curvatis intusque emarginatis, tarsorum anticorum mediorum-

que articulis 1—3 dilatatis et articulis ultimis parum elongatis.

Elongate, narrow, moderately convex, extremely finely reticulate and extremely

finely but not closely punctulate ; pitchy-black, with head and sides of thorax reddish, with

33—2

258 PERCY SLADEN TRUST EXPEDITION

a narrow yellowish-testaceous vitta across the base of the elytra, including the scutellum

and scarcely interrupted at the suture, narrowing at its outward extremities and not

reaching quite to the shoulders, and with a subapical testaceous mark on each elytron; body

beneath dark reddish-pitchy, antennz and legs testaceous, the posterior legs darker. Head

with two punctate impressions on either side near the eye. Thorax with a group of fine

punctures or punctiform striolz on either side near the base, this sculpture varying but never

very strongly developed : the thorax is also slightly impressed on either side in the region of

this sculpture. Elytra with no striz, but with 2 distinct though interrupted series of

punctures, consisting of little lines of fine punctures with gaps between them: between these

two series and between the outer one and the side-margin respectively, are two other much

less distinct series, more interrupted and often hard to see, the inner one consisting often

of isolated punctures separated by rather long intervals. In the posterior part of the elytron

there is a submarginal series of punctures bearing fine pale hairs; in some specimens the

punctures of the discal series also bear some similar hairs, as also do the punctures of the

transverse row which (as in various other species of the genus) runs across the prothorax

just behind its front margin: but in most specimens these hairs are absent, being probably

worn away. The posterior coxze and anterior abdominal segments are striolate laterally.

In the ¢ the terminal joints of front and middle tarsi are slightly longer than in the ¢:

other ¢ characters are given in the diagnosis.

This species belongs to Group I. of the genus, having no strize on the elytra.

Judging from the descriptions it seems to be allied to the Madagascar species C. regim-

bart. and C. apicalis, Fairmaire (Ann. Soc. ent. Belgique, xlii. 1898, p. 464), but is

evidently distinct: C. regimbarti has a transverse basal vitta and a subapical mark on

each elytron, but is much larger and is described as “‘ fuscus” instead of black: C. apicalis

is about the same length as C. gardineri, but has only a minute humeral mark instead of

a transverse basal vitta, and differs too in other respects. Having seen no specimens

I cannot be sure whether either of these species is really close to C. gardineri or not.

C. gardineri is not very close to any species which I have seen in Dr Sharp’s or other

collections in the British Museum.

35 specimens. It is the only water-beetle which I ever found in any numbers in the

mountain-streams of Seychelles. As far as my experience goes it is found not so much in

the swiftly-running parts of the streams (which have prawns and crabs in them), as in

more stagnant parts where the streams spread out on more level ground, such as the

Silhouette Mare aux Cochons, into pools and small swamps. It was found in such places

at elevations up to 1000 feet or over. I have dedicated it to Professor J. Stanley

Gardiner, by whom it was first found in 1905.

Loc. Seychelles. Praslin: 1905, 5 specimens. Silhouette: Mare aux Cochons

plateau, VIII—IX. 1908, 16 specimens. Mahé: from a swampy hollow near Morne

Blanc, X. 1908, 14 specimens.

51. Copelatus pandanorum, sp. nov. (Pl. 12, fig. 16).

é?. Oblongo-ovalis, depressus, ferrugineus vel interdum piceus: capite pronoto-

que persubtilissime punctulatis, hoc utrinque ad basin plus minusve striolato: elytris

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 259

subtilissime crebreque, ad apicem parum fortius, punctulatis, stri& submarginali antice

valde abbreviata, disco striis tribus integris et duabus incompletis; 2 et 4 et 5 basin attingen-

tibus fereque ad apicem continuatis; 1 et 3 solum ad apicem indicatis, in parte anteriore

tote deletis, variabilibus, seepius interruptis, interdum fere obsoletis. Long. corp. circa 5 mm.

$ tibiis anterioribus ad apicem dilatatis, ad basin curvatis intusque emarginatis,

tarsorum anteriorum et mediorum articulis 1—3 dilatatis.

Oblong-oval and depressed: unicolorous, ferruginous, or sometimes much darker, in

which case the head and thorax are pitchy-ferruginous and the elytra pitchy. Surface very

finely and minutely reticulate. Head extremely finely punctured, on either side towards

the eye often more or less impressed and with 2 or 3 small groups of stronger punctures.

Thorax with some punctiform striolz on either side near the base; this sculpture varies

greatly, being sometimes very little developed, in other cases covering an area reaching

almost to the front margin, the variation apparently independent of sex (the sculpture

being well-developed in some males): the thorax has also sometimes a slight impression

near the base on either side of the middle. Elytra with numerous very fine punctures,

more marked towards the apex: submarginal stria ending behind some distance before

the apex, and abbreviated in front at about 4 the length of the elytron from the base :

disc with 5 striz, but frequently appearing only 3-striate owing to the great reduction

of nos. 1 and 3; these are present only in the posterior part of the elytron, varying in

length, the front end of no. 1 being usually some distance behind the middle of the

elytron while that of no. 3 is nearer the middle; they end behind a little before the apex,

and are frequently interrupted in a number of places so that they often consist of a

number of separate short lines, and in some cases one of them (especially no. 1) may be

almost entirely absent: nos. 2, 4 and 5 are very distinct, starting from the base of the

elytron and being continued throughout its length, nos. 2 and 4 being abbreviated a very

little before, and no. 5 some way before, the apex; no. 5 curves slightly towards the

lateral margin just behind the base. Wings examined in 1 male and 1 female, found to

be 54mm. long, while the length of the elytron is 33mm. Underside ferruginous, the

posterior coxee and first four abdominal segments bearing striolz at the sides, those on

the coxze being longitudinal in direction and those on the segments curving inwards

towards the middle line. Male characters of the tarsi etc. are given in the diagnosis.

The habitat of this species is very remarkable. The series before me consists of 17

males and 20 females, all of which, without exception, were found living in the water that

collects between the bases of the leaves of certain precinctive species of screw-pine*

(Pandanus), many feet above the ground. They were found only in the endemic high

damp mountain-forests, in situations where the water between the leaves would never

under ordinary circumstances dry up. In one case two larvee, having a quite character-

istic Dytiscid facies, were also found between the leaves, showing that in all probability

the whole life-cycle takes place in this curious habitat. There was also very frequently

found with the Dytiscids another kind of larva, sometimes as much as 20mm, long,

elongated and somewhat depressed, with a smooth dark hard integument, with the body

* Tn all cases where there is an exact record of the species of Pandanus, it is P. Hornei: but I cannot be

certain that a few of the specimens are not from P. sechellarum.

260 PERCY SLADEN TRUST EXPEDITION

ending in a sharp acuminate process, and with apparently biforian spiracles. This larva

has somewhat the facies of an Elaterid larva; but it is quite uncertain to what beetle it

belongs, or why it should be continually found accompanying the Copelatus between the

Pandanus leaf-bases. I have thought it best to mention it here, while hoping that a full

description of it and of the Copelatus-larva may be given in a later part of this work.

With regard to the curious habitat of Copelatus pandanorum, it is interesting to compare

the cases of Oxyomus palmarum and Atenius lodoicee (supra, pp. 225, 226), and the

summary of facts concerning creatures found between bases of leaves of palms and Pandani

in my introductory paper (Trans. Linn. Soc. London, ser. 2 (Zool.), Vol. xiv. 1910,

pp. 24—5). The species was first found in 1905 by Professor Gardiner, and the rest of

the material was obtained by myself in 1908: details are given below.

Loc. Seychelles. Silhouette: from leaf-bases of two growing trees of Pandanus

Horne in forest above Mare aux Cochons, 22. [X. 1908, 8 3, 13 2, and two larvee (No. 35 a).

Mahé: from leaf-bases of growing Pandanus, near Morne Blanc, X—XI. 1908, 3 ¢ and 3 8,

all very darkly-coloured except one (No. 91); also 2 ¢ and 1 ? collected in 1905 (Gardiner).

Praslin: from leaf-bases of Pandanus Hornet in jungle on Cétes d’Or Estate, 30. XI.

1908, 42, 39 (No. 342).

52. Copelatus pulchellus (Klug).

Agabus pulchellus Klug, Symb. phys., iv. 1834, pl. xxxiii., fig. 7.

Copelatus pulchellus Sharp, On Dytiscidee, p. 583; Alluaud, Liste Coléopt., p. 66;

Régimbart, Bull. Soc. ent. France, 1900, p. 50; Kolbe, Abh. Senckenb. Ges., xxvi. 1902,

p- 574.

Régimbart has described (/.c.) the Aldabra form of this insect, and the 4 males and

4 females before me correspond with his description. It is a small form—the specimens

in question being about 5mm. long—and the female has the thorax and elytra almost

entirely covered with a dense sculpture of deep striolee which on the elytra undulate and

anastomose. The species is very variable in this respect, some females being entirely

destitute of striole, and some having only the lateral part of each elytron striolate (see

Régimbart, Mém. Soe. ent. Belgique, iv. 1895, p. 164).

Loc. Aldabra: Takamaka, some at light, X—XII. 1908 (Fryer): 1895 (Voeltzkow).

Madagascar ; E., W., and 8. Africa.

Hypaticus Leach, Zool. Miscell., ii. 1817, p. 69.

53. Hydaticus leander (Rossi).

Dytiscus leander Rossi, Faun. Etrusce., i. 1790, p. 202.

Hydaticus leander Sharp, On Dytiscide, p. 662; Alluaud, Liste Coléopt., p. 68 ;

Kolbe, Mitt. Zool. Mus. Berlin, v. 1910, p. 19.

3 ¢ from Coetivy. In 2 the thorax is reddish-brown, narrowly darker along the

posterior margin: in the third it is much darker, all the middle portion being dark, and

the head also is much darker than in the two other specimens.

Loc. Coetivy, 1905. Seychelles; La Digue, 1892 (Alluaud). Distribution very

wide ; S. Europe, Syria, Africa and Cape Verde Islands, Madagascar.

SCOTT—COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 261

Eretes Castelnau, Ann. Soc. ent. France, i. 1832, p. 397.

54. Hretes sticticus (Linneeus).

Eretes sticticus (Linn.); Sharp, On Dytiscidee, p. 699; Régimbart, Mém. Soe. ent.

Belgique, iv. 1895, p. 208; Linell, Proc. U. 8. Mus., xix. 1897, p. 698; Alluaud, Liste

Coléopt., p. 70; Kolbe, Abh. Senckenb. Ges., xxvi. 1902, p. 573.

1 male and 3 females: they have a rectangular dark patch, emarginate in front, on

the vertex; the transverse dark thoracic band is short and not divided in the middle; the

general colouring of the elytra is dark, and the postmedian dark band is not strongly

marked ; the elytral fossa of the ¢ is rather long. They appear therefore to approach

near to the var. helvolus Klug. The length is about 13—15 mm.

Loc. Aldabra: 1908—9 (Fryer); 1895 (Voeltzkow), 1893 (Abbott). Cosmo-

politan.

CyBisTER Curtis, Brit. Ent., iv. No. 151, 1827.

55. Cybister tripunctatus (Olivier).

Dytiscus tripunctatus Olivier, Ent., ii. 40. 1795, p. 14, pl. 3, fig. 24.

Cybister tripunctatus Sharp, On Dytiscide, p. 727; Linell, Proc. U. 8S. Mus., xix.

1897, p. 699; Alluaud, Liste Coléopt., p. 72; Kolbe, Abh. Senckenb. Ges., xxvi. 1902,

p- 572.

10 males and 3 females from Aldabra agree with Kolbe’s description (/.c.) of the

subsp. aldabricus in having the yellow border of the same width as in the subsp. af77-

canus, in being smaller (ca. 25 mm. long) than most specimens of that subspecies, in being

somewhat short, and having the elytra rather conspicuously broadened behind the middle.

2 of the females, however, exhibit an excessively fine, but under a powerful lens quite

distinct, sexual sculpture on the basal portion of the elytra: in this respect they approach

the condition found in the Madagascar form cinctus (Sharp) and in some specimens in the

British Museum from the Mascarene Islands. Kolbe states that in the Aldabra females

examined by him and included in the subsp. a/dabricus, there is no sexual sculpture in

the $, which thus approaches nearer to the form africanus.

Loc. Aldabra: Takamaka, 1907 (Thomasset) ; 1908—9 (Fryer) ; 1895 (Voeltzkow),

1893 (Abbott). Distributed in various forms over 8. Europe, Africa, Madagascar and

Mascarene Islands, and 8. and E. Asia to Australia.

262 PERCY SLADEN TRUST EXPEDITION

EXPLANATION OF PLATE 12.

Fig. 1. Oxyomus palmarum, sp. nov.

Fig. 2. <Atanius lodoicee, sp. nov.

Fig. 3. Nesohoplia senecionis, gen. et sp. nov.

Fig. 4. 3 - 3 % » labrum.

Fig. 5. ' " » a racndible,

Fig. 6. ” » » 5 Se omaxilla,

Fig. 7. : 5; 3) co ele biurn:

Fig. 8. » » » » , tarsal claws, ¢.

Fig. 9. » ” » » » tarsal claws, 9.

Fig. 10. Adoretus versutus Harold, claws of middle tarsus of ¥; a, dorsal view of end of bigger claw,

drawn to larger scale, showing cleft.

Fig. 11. es i claws of middle tarsus of 9.

Fig. 12. Pe - end of xdeagus; a, dorsal; b, ventral view.

Fig. 13. Tachys seychellarum, sp. nov.

Fig. 14. Bidessus capitatus Régimbart, var.?, elytron.

Fig. 15. Bidessus farquharensis, sp. nov., elytron.

Fig. 16. Copelatus pandanorum, sp. nov., $.

PERcyY SLADEN TRUST EXPEDITION. Trans. LINN. Soc.,SER.2. ZOOL. VoL. XV. PL.12.

(ScoTT)

COLEOPTERA, LAMELLICORNIA AND ADEPHAGA

No. XVI.—ORTHOPTERA: ACRYDIIDA, PHASGONURIDA, GRYLLIDA.

Par LE Dr. Ianacto Botivar.

(Planches 18 et 14.)

(CoMMUNIQUE PAR LE ProressEUR J. STANLEY GARDINER, M.A., F.R.S., F.L.S.)*

Lu le 20 juin 1912.

La série d’Orthoptéres des Seychelles et des iles situées au Nord de Madagascar

réunie au Musée Zoologique de l'Université de Cambridge et représentant le résultat

des voyages du Professeur Stanley Gardiner et de Mr Hugh Scott et de Mr J. C. F. Fryer

offre un intérét tout particulier, non seulement par le nombre considérable d’espéces

recueillies mais aussi parce qu'elle nous permet de connaitre les caractéres de la faune

de ces Archipels, pas suffisamment connue 4 présent. Grace a ces collections on peut

apprécier une trés grande différence entre les Archipels des Seychelles, Amirantes et

Chagos et celui formé par les iles Aldabra, Cosmoledo, Assumption, ete. A ce dernier

correspond un plus grand nombre de formes africaines, car, outre le Gastrimargus marmo-

ratus Thunb., Paratettix scaber Thunb., Acheta bimaculata De Geer, Curtilla africana

Pal. de Beauv. qui sont 4 la fois des formes africaines et asiatiques on trouve deux

Catantops de type africain, Acrotylus patruelis Sturm., Phaneroptera nana Charp. et

le genre Conipoda Sauss. Il ne faut cependant pas oublier que toutes ces formes sont

ailées ce qui en facilite la dispersion, de telle sorte que deux d’entre elles se retrouvent

méme jusqu’en Europe.

La faune des groupes des Seychelles et Amirantes est plus originale, on y trouve

un nombre considérable de genres propres, Procytettix, Coptottigia, Rhyncotettix, Gryl-

lapterus, Pheogryllus, Seychellesia, Phalangacris, et Zarceus, qu’on ne retrouve pas

ailleurs et qui donnent un caractére propre ’ la faune de ces iles. On pourrait dire & en

juger par les matériaux réunis dans cette collection, que la faune de toutes ces iles

renferme un fond commun africano-indien, outre des formes spéciales trés nombreuses,

notamment dans le groupe Amirante-Seychelles, car une vingtaine des espéces décrites

appartiennent & ces iles.

La faune de Chagos apparait aussi trés spéciale, toutefois elle reste en rapport

avec celle des Seychelles, comme le prouve le genre si curieux Scottia formé par de

trés petits grillonniens aptéres, dont une espéce a été trouvée & Silhouette et 4 Chagos la

deuxiéme.

* (I am indebted to Mr Hugh Scott for kindly reading the proofs of this paper. He has also selected

the specimens for illustration and added the localities where the species were obtained. J. 8. G.]

SECOND SERIES—ZOOLOGY, VOL. XV. 34

264 PERCY SLADEN TRUST EXPEDITION

Je ne dois pas terminer sans exprimer mon admiration pour le nombre considérable

d’especes réunies qui démontre le labeur extraordinaire réalisé par les savants ex-

plorateurs qui les ont recueillies. Les Orthoptéres, en général, sont peu nombreux dans

tous les pays et ceux observés aux Seychelles dépassent, & ne pas douter, le nombre

de ceux qu’on pourrait espérer de trouver dans cette faune.

Quant aux noms adoptés pour la désignation des especes je crois bon de dire que j'ai

suivi le catalogue récemment publié par Mr Kirby, bien que je ne sois pas d’accord avec

certains changements, mais je crains d’augmenter la confusion que existe déja dans la

synonymie des Orthoptéres et je pense que la mission des Congrés devrait étre de fixer

d'une maniére définitive les noms & employer, pour éviter que chaque auteur adopte

des variations quoiqu’elles paraissent justifiées. Seulement j’ai cru plus utile de conserver

les noms anciens des familles des Acrydiidee et des Gryllide puisque les noms d’Acrydium

et Gryllus subsistent dans ces familles, que de changer ces noms par ceux de Locustide et

Achetidee, le premier ayant été employé jusqu’a présent pour une autre famille et le second

étant moins commune que celui de Gryllide.

Fam. Acrydiide.

Gen. SysToLEDERUS, Bolivar.

1. Systolederus, sp.

Loc. Seychelles: Mahé, 1906 (Thomasset).

Un seul individu, trés jeune, dont on ne peut déterminer l’espéce ; cependant cette

trouvaille a beaucoup d’intérét parce que toutes les especes sont de la région orientale,

Ceylan, Sumatra, Philippines, Burmah.

Gen. Ocytettrx, Hancock.

2. Ocytettix pupulus, sp. nov. (Pl. 18, fig. 1).

Obscure ferrugineus. Vertex inter oculos lateribus sinuatus, antrorsum ampliatus,

carina media antice distincte compresso-producta, utrinque fossulatus, rugulosus, postice

nodulo parvo instructus, ab antico visus medio et supra oculos acute productus. Oculi

distincte prominuli, exserti. Antennee filiformes, longiusculz, angulum posticum loborum

pronoti subattingentes. Pronotum impresso-punctatum et inter sulcos transversos sub-

tuberculatum, antice truncatum, postice ad medium femorum posticorum extensum,

angulatim excisum ; carinis lateralibus in prozona parallelis, carina media inter humeros

elevato-rotundata, gibbosa, in metazona parum elevata sed apicem versus compressa,

dorso inter humeros utrinque nodulo elongato, compresso et in processu carinis obliquis

instructo ; carinis lateralibus fortiter compresso-elevatis atque biundatis; angulo postico

loborum lateralium extrorsum verso, apice oblique truncato. Elytra aleeque nulle.

Femora antica, carinis compressis, superioribus undatis, inferioribus dentatis. Femora

postica carinis angustissime compressis, superne lobata et minute crenulata, inferne pone

medium unidentata; pagina externa convexa, carinis obliquis, compressiusculis, carina

inferiore externa bigibbosa. Tibize posticee marginibus regulariter spinosee. Tarsi postici

BOLIVAR—ORTHOPTERA: ACRYDIIDA, PHASGONURIDA®, GRYLLIDA 265

pulvillis tribus subzeque longis, vel pulvillo secundo minore. Abdomen segmentis

dorsalibus margine postico bidentatis. Ovipositor valvulis elongatis, fortiter dentato-

spinosis.

Long. corp. ¢ 6,8; pron. 3,5; femor. post. 4,2 mill.

Long. corp. ? 10; pron. 4; femor. post. 4,5 mill.

Loc. Seychelles. ‘Silhouette: high forests near Mt Pot-d-eau and Mare aux

Cochons, VIII.—IX. 1908.”

Malgré le pronotum tronqué en arriére je range cette espéce dans le genre Ocytettix

Hane. (1907, Trans. Ent. Soc. London, p. 226) dont la diagnose devra se modifier

quelque peu mais dans des particularités non-essentielles. Le Ocytettix latihumerus

Hance., la seule espéce connue jusqu’’ présent, provient de la Baie d’Antongil au N.E. de

Madagascar.

3. Ocytettia nymphula, sp. nov.

Statura minore ; antenne brevissimze, angulum posticum loborum pronoti haud attin-

gentes ; oculi minus exserti; vertice angustiore, carina media subindistincta antice haud

producta, postice inter oculos linea transversa elevata instructo. Pronotum postice

truncatum. Pedes breviores, fusco-annulati. Tarsi postici breviores.

Long. corp. $ 6,5; pron. 3; fem. post. 3,5 mill.

Long. corp. $8; pron. 3,5; fem. post. 4 mill.

Loc. Seychelles. “Silhouette: high forests, VIII.—IX. 1908. Mahé, 1908—9:

high forest of Morne Blane and Morne Pilot; high forest behind Trois Fréres; forest

above Cascade Estate; Mare aux Cochons district, 1—2000 ft.”

J’ai fait la description d’aprés deux exemplaires ? et ¢ de Silhouette qui me semblent

adultes. Ceux de Mahé ne me semblent pas différer de ceux-ci. L’espéce étant tout d

fait aptére, il est difficile de distinguer les jeunes des adultes; cependant la longueur des

antennes et la présence de la dent des fémurs postérieurs en avant des genoux peuvent

servir pour en faire la distinction.

Gen. ProcyTertrx, gen. nov. (Pl. 13, fig. 2).

Vertex antrorsum oblique ascendens, a supero visus oculo parum latior, elongatus,

longior quam latior, ante oculos distincte productus, antice medio carinula producta

et utrinque rotundatus. Frons obliqua, inter oculos carina media perfecte explicata

ante oculos furcata, marginibus subparallelis leviter distantibus. Ocelli postici fere

inter margines anteriores oculorum siti. Oculi magni, superne elongati subexserti, a

latere visi apicem versus sensim angustati. Antenne 13-articulate, distincte ante

oculos insertee, breves, filiformes. Pronotum antice truncatum, postice medium femorum

posticorum hand attingens, truncatum vel sinuatum, dorso plus minusve tectiforme

medio distincte carinato et inter humeros gibbuloso tubereulatoque, carinis lateralibus

prope marginem anticum parallelis, in metazona ab angulis humeralibus usque ad apicem

acutis, undatis; angulo postico loborum lateralium obtusato extrorsum indistincte expanso.

Pedes elongati. Femora 4 antica angusta, carinis haud vel parum dilatatis. Tibize

34—2

266 PERCY SLADEN TRUST EXPEDITION

posticee carinis regulariter dentatis. Tarsi elongati, articulo basali articulis duobus

sequentibus unitis distincte longiore. Abdomen superne compressum haud dentatum.

Ovipositor valvulis denticulatis.

Genre prochain d’Ocytettix et aptére. La présence de la dent antégéniculaire aux

fémurs postérieurs permet de considérer comme adultes les exemplaires décrits. Je n’ai

pu examiner que deux individus adultes et un jeune.

4. Procytettix fusiformis, sp. nov. (Pl. 18, fig. 2).

Fuscus vel griseus, obscure variegatus. Caput superne leviter rugosum. Fastigium

verticis ante oculos productum, a latere visum parte producta dimidia altitudine oculorum

haud longiore. Pronotum superne rugulosum, pone sulcum medium nodulis nigris obtusis

dorsalibus quattuor: dorso inter humeros subgibbuloso, apice truncato-sinuato. Femora

postica carina dorsali dente geniculari instructa. ‘Tarsi postici pulvillis elongatis, obtusis,

-pulvillis duobus primis subzeque longis, pulvillo tertio secundo vix longiore.

Long. corp. ¢ 7; pron. 3,8; fem. post. 4 mill.

Long. corp. ? 10; pron. 4,2; fem. post. 5,5 mill.

Loc. Seychelles. ‘“ Mahé: high damp forest at summit of Morne Pilot, over 2000

feet, 1908.”

Gen. Paratettrx, Bolivar.

5. Paratettix chagosensis, sp. nov. (Pl. 18, fig. 3).

P. meridionala valde affinis; angustior, carinis anterioribus prothoracis magis dis-

tantibus ; elytris minus oblongis, brevioribus; pedibus intermediis minoribus, preecipue

in ¢; carinis femorum intermediorum minus expansis, leviter sed distincte undatis 9,

vel subintegris f. Costa frontalis integra a latere visa convexa, inter oculos haud sinuata.

Antenne distincte inter oculos site. ¢ femora intermedia quam antica haud validiora,

carina inferiore subundata.

Long. corp. 7,5; pron. 7,5; fem. post. 4,5 mill.

Long. corp. ¢ 8; pron. 9; fem. post. 5 mill.

Loc. Chagos Islands: Diego Garcia, Pointe Marianne, 10. VII. 1905.

Ce qui caractérise principalement cette espéce et contribue & la distinguer du

P. meridionalis Ramb., ce sont les fémurs intermédiaires qui sont & peine plus grands que

les antérieurs, notamment chez le g, et dont les carénes sont moins dilatées et tres

peu festonnées. Le corps est plus étroit et les carénes antérieures du pronotum sont

plus séparées entre elles, la prozone étant dans cette partie antérieure plus large, trans-

verse entre les carénes, tandis que dans meridionalis Ramb. cette portion chez le # est &

peine transverse, l’étant davantage dans la 9.

Les pulvilli du métatarse postérieur sont trés aigus, se terminant par une épine,

le dernier est plus court que les deux autres réunis. J’aurais cru par la provenance avoir

a faire au Paratettix voeltzkovviana Sauss. de Nossi-Bé, mais il y a dans la description de

cette espéce de particularités qui me font penser que cette espece pourrait n’appartenir pas

au genre Paratettix : “ verticis rostrum lanceolatum, carinatum, apice acutum.”

BOLIVAR—ORTHOPTERA: ACRYDIIDA, PHASGONURIDA, GRYLLIDA 267

6. Paratettix scaber (Thunberg), Nova Acta Upsal., vii. p. 159 (1815).

Loc. Aldabra, 1908—9 (Fryer). Seychelles: ‘Mahé; marshy country near

coast at Anse aux Pins and Cascade; Cascade Estate: Félicité, 1908, from a coconut-

plantation.”

Espéce d’Afrique mais qui s'est retrouvée aussi aux Indes orientales.

Gen. Coprorrieia, gen. nov. (Pl. 18, fig. 4).

Corpus compressiusculum. Caput haud exsertum. Vertex antrorsum subangusta-

tum, deplanatum, antice carinis transversis nullis, carinis lateralibus utrinque ad oculos

perfecte explicatis antice interruptis, carina media compressa, cum carina frontali

continua, a latere visa rotundata. Frons obliqua, marginibus antrorsum parum diver-

gentibus. Antenne filiformes, articulis 13 composite, articulis 6 apicalibus longioribus,

inter oculos insertee. Pronotum acute tectiforme, antice obtuse productum, postice apicem

versus leviter deplanatum et obtuse sinuatum ; carinis lateralibus tantum pone humeros

explicatis ; lobis lateralibus angulo postico obtuso postice subtruncato, margine inferiore

leviter extrorsum verso, postice indistincte sinuato. Elytra nulla. Femora antica

elongata superne carinata. Femora postica carina superiore ante apicem dente in-

structa. Tibize posticee superne sulcatze, apicem versus leviter ampliate, marginibus

spinosis.

Ce genre se rapproche de Coptotettix Bol. dont il différe par le pronotum en toit aigu,

la caréne frontale plus saillante entre les antennes, le manque d’ailes, &c.

7. Coptottigia cristata, sp. nov. (Pl. 18, fig. 4).

Fusco-testacea, crista dorsali pronoti nigro- et testaceo-maculata. Vertex inter oculos

oculo haud vel vix latior. Antenne basi apiceque pallide. Costa frontalis inter antennas

prominula, rotundata, haud sinuata. Pronotum impresso-punctatum, antice angulatim

productum, postice apicem femorum haud superans, carinis lateralibus pone humeros

fusco-trimaculatis. Femora carinis fusco- et testaceo-variegatis. Tibize anticee medio

annulo testaceo, posticee fuscee. Articulus primus tarsorum posticorum pulvillis tribus

eeque longis.

Long. corp. 2 10; pron. 9,5; fem. post. 6 mill.

Long. corp. ? 12; pron. 11; fem. post. 7 mill.

Loc. Seychelles. ‘Silhouette ; found among damp dead leaves in the high forests

near Mont Pot-d-eau and Mare aux Cochons. Mahé; summit of Morne Pilot, over

2000 ft. ; slopes of Morne Seychellois, about 1500 ft., &c.”

Un exemplaire de Silhouette est de couleur testacée le long du dos; il a la eréte

ornée de taches noires et les tarses piles.

Gen. Praprs, Karsch.

8. Peades cruciformis Bolivar, Ann. Soc. Ent. France, vol. lxiv. p. 376 (1895).

(P18, fig. 5).

Loc. Seychelles. Mahé, 1905 and 1908—9; Silhouette, 1908—9; “from the

mountain-forests, sitting on leaves of trees, &c.”

268 PERCY SLADEN TRUST EXPEDITION

La forme des parties anales mérite aussi quelques détails. L’abdomen est claviforme

ou gonflé vers l'extrémité. Le segment anal du ¢ est évasé en arriére et élevé au milieu

formant une apophyse divisée en deux dents obtuses et & bords noiratres. Le dernier

segment ventral est grand, convexe, avec un court sillon 4 la base, tronqué au bout mais

élargi de chaque cdté en lame dont le bord postérieur trés long est droit. Ces lames

encaissent une prolongation moyenne assez longue et élargie vers l’extrémité, parcourue

par un sillon dont les bords sont renflés, notamment vers |’extrémité, qui est de couleur

noiratre. Ce procés est parfois tout & fait noir, de méme que le bord postérieur de l’avant-

dernier segment abdominal d’un cété et d’autre.

Des exemplaires mieux conservés que ceux qui m’ont servi pour décrire cette

espéce me permettent d’en modifier la description quant & la coloration, qui est d'un

vert-jaune clair apres la mort*. La partie supérieure de la téte est brune dans

quelques exemplaires et le dos du pronotum d’une couleur chataine, ainsi que le dos de

labdomen.

Gen. AoLopus, Fieber.

9. Atolopus laticosta, sp. nov.

Fusco-griseus. Caput crassiusculum, superne fuscum, plus minusve griseo-fasciatum.

Vertex inter oculos latiusculus; fastigio concaviusculo, rhomboidali; foveole distincte

elongate, antrorsum subangustate. Costa frontalis lata ad verticem coarctata, inter

antennas grosse impresso-punctata, infra ocellum magnum convexa, sparse punctata.

Antenne filiformes crebre et minute punctate, fusco-fasciate, apicem versus fusce. Pro-

notum postice obtuse angulatum vel subrotundatum, antice coarctatum, sulcis transversis

valde impressis et fusco-repletis, sulco postico vix ante medium sito; dorso fusco, haud vel

imperfecte pallide cruciato; lobis deflexis parallelis, altis, fusco-variegatis, macula albida

superne prope marginem anticum nec non medio inter sulcos. Elytra apicem femorum

valde superantia, extus maculis magnis fusco-nigris per spatia transversa hyalina divisis ;

spatio primo hyalino introrsum angustato. Alze fuscee, basi interna dilute citrina. Femora

postica brevia, basi lata, intus nigra ante apicem flavo-annulata, subtus subsanguinea ;

extus nigro-fusco-varia, ante apicem annulo pallido, superne obscure trifasciata. Tibize

postice basi late nigra, vel basi et annulo ante medium sito nigris, pone medium flavee et

subcxruleze, prope apicem inferne infuscatee: variat, tibise apicem versus rufescentes.

g Lamina subgenitalis breviter conica, apice obtuso sursum directo, pilosa.

Long. corp. ¢ 20; pron. 3,5; elytr. 20; fem. post. 12 mill.

Long. corp. ? 25; pron. 4,2; elytr. 24; fem. post. 14 mill.

Loc. Chagos Islands, 1905: Diego Garcia; Peros Banhos Atoll; Salomon Atoll.

Farquhar Atoll, 1905.

Cette espéce ressemble beaucoup & 4. famulus, mais la grosseur de la téte, la forme

des fossettes du vertex bien plus longues, la largeur de la céte frontale et sa ponctuation,

la forme du pronotum et la longueur moindre de la métazone, permettent de la distinguer

facilement.

* Bright green during life.—H. Scorr.

BOLIVAR—ORTHOPTERA: ACRYDIIDA, PHASGONURIDA, GRYLLIDA 269

10. Molopus aldabrensis, sp. nov.

Parvus, colore multo variabile. Caput crassiusculum. Vertex inter oculos pallidus vel

vitta media pallida ornatus. Fastigium subrhomboidale, concaviusculum, antice attenu-

atum. Foveole verticis antrorsum angustatee, marginibus punctatis. Costa frontalis,

ante ocellum distincta, vage punctata, ad fastigium angustata. Antenne unicolores,

Pronotum carinula media percurrente a sulco postico interrupta, metazona quam prozona

sesqui longiore, postice obtusangula. Elytra apicem femorum posticorum quinta parte

superantia, fascia pallida ante et pone medium ; vena intercalata ad apicem versus venam

radialem vergente. Femora postica brevia basi latiora, fere ut in 4. strepente constructa.

Tibize posticee basi pallidee, denique czerulez, annulo ante medium apiceque preecipue

subtus nigris. Lamina subgenitalis ¢ breviter conica.

Variat. A. Rufo-testaceus fusco-variegatus ; capite pronoto elytrisque fuscis, fascia

media cephalothoracica fasciaque humerali elytrorum pallidis ; femora postica transverse

fusco-fasciata.

Variat. B. Pallide testaceus; capite pronoto, area scapulari elytrorum nec non

femoribus posticis viridibus ; elytra campo radiali infuscato, transverse pallide fasciato.

Variat. C. Rufo-testaceus, nigro-irroratus.

Long. corp. f 19; pron. 2,8 ; elytr. 14; fem. post. 8,5 mill.

Long. corp. ? 29; pron. 4; elytr. 20; fem. post. 12 mill.

Loc. Aldabra, 1908—9 (Fryer). Assumption, 1910 (Dupont). Cosmoledo, 1907

(Thomasset). St Pierre, 1907.

Prochain de 4. strepens Latr. mais plus petit avec le pronotum plus contracté au

milieu. Il pourrait étre voisin aussi de sansibaricus Karsch, que cet auteur compare avec

tergestinus, mais la céte frontale n’est pas sillonnée dans a/dabrensis, le pronotum étant

convexe supérieurement.

11. MHolopus dociostauroides, sp. nov.

Parvus, griseus, fusco-nigro-varius. Caput superne pallidum. Vertex inter oculos

utrinque macula fusca, fastigio subpyriforme, concaviusculo; foveole verticis antrorsum

parum angustate, trapezoidales. Costa frontalis ante ocellum minutum obliterata,

fastigium versus sensi angustata, leviter impresso-punctata. Antenne filiformes basin

versus angustate, pallidee, pone medium fusco-annulate. Pronotum linea media parum

elevata, sulco typico vix ante medium sito, margine postico obtuse angulato vel sub-

rotundato, pallido, lineis pallidis marginalibus fasciam fuscam internam limitantibus, lobis

deflexis ad dorsum fusco-variegatis. Elytra apicem femorum parum superantia, fusca,

lineis duabus transversis griseis angustis signata, campo dorsali griseo. Al limpidee

hyaline. Femora postica intus extusque fusco-trifasciata. Tibize posticw pallida, basi,

annulo ante medium apiceque fuscze.

Long. corp. ¢ 17; pron. 3; elytr. 15; fem. post. 9,5 mill.

Long. corp. 2 23; pron. 4,5; elytr. 20; fem. post. 13 mill.

Loc. Seychelles: “Mahé, 1908; Félicité, plantation near coast, 1908; Bird Island,

1908 ; Coetivy, 1905. Amirantes, 1905: Poivre, d’Arros and Desroches.”

270 PERCY SLADEN TRUST EXPEDITION

Le ¢ ressemble tout & fait par la taille et la coloration 4 certaines variétés de Docios-

taurus genet Ocsk. La coloration est trés caractéristique notamment par les élytres, qui

sont noirs avec une ligne transversale étroite non élargie antérieurement, placée avant et

une autre aprés le milieu de l’élytre. Je rapporte aussi 4 cette espéce un exemplaire $ des

fles Amirantes (d’Arros). Cette espéce se distingue de fasciatipes par sa taille plus petite.

12. Molopus fasciatipes, sp. nov.

Pallide testaceus, fusco-variegatus. Caput minus crassum, inter oculos linea fusca

arcuata transversa. Vertex obovatus, inter oculos quam costa frontalis ad ocellum vix

latior. rons leviter obliqua, costa fastigium versus sensim angustata minute impresso-

punctata ad ocellum leviter impressa. Antenne fusco-annulate, breves, in ¢ marginem

posticum pronoti haud attingentes. Pronotum linea media elevata, a sulco typico longe

ante medium sito tantum intersecta, dorso in metazona late infuscato, lateribus linea

pallida subdecussata in prozona valde sinuata et extus fusco-terminata; lobis deflexis

medio striga nigra nitida atque macula pallida ad medium. Elytra apicem femorum

superantia, campo anali griseo-testaceo, campis externis fuscis pallide interruptis, ante et

pone medium fascia pallida transversa, tertia. parte apicali hyalina fusco-maculata.

Ale hyaline, venis apicem versus obscurioribus. Pedes elongati, pallidi, fusco-fasciati

et griseo-villosi. Femora postica planiuscula basi lata, extus fasciis tribus trans-

versis interruptis in maculas solutas, area supera externa haud fasciata, intus fasciis

tribus atque geniculis fuscis. Tibize posticee pallidee, dimidio apicali ceeruleo, basi annulis-

que duobus, primo ante medium secundo ad apicem, fuscis, spinis pallidis apice nigro

armatze. Lobi mesosternales in ¢ vix, in ? satis, distantes. Corpus subtus flavescens.

Long. corp. $ 19; pron. 3,5; elytr. 17 ; fem. post. 11 mill.

Long. corp. $ 27; pron. 5; elytr. 24; fem. post. 19 mill.

Loc. Farquhar Atoll, 1905: Providence, Cerf Island, 3. X. 1905.

Cette espéce ressemble un peu A strepens par ses formes, mais les fémurs postérieurs

ne sont pas aussi larges et les jambes postérieures sont bleues dans leur moitié postérieure.

Mr Kirby a décrit une esptce (Hpacromia rufostriata, Proc. Zool. Soc., 1888, p. 550,

et dans “Christmas Island monograph”) qui pourrait étre voisine de celle-ci, mais la

description ne fournissant d’autres caractéres que ceux des couleurs, ne permet pas d’en

affirmer l'identité, méme malgré la figure de la Pl. XIII. Du reste Mr Walker en a

décrit plusieures especes qu'on ne pourra reconnaitre qu’d aide des exemplaires originaux.

13. Molopus perpusillus, nom. nov.

Epacromia tamulus (Fabr.), var. pusilla Bolivar, Ann. Soc. Ent. France, vol. lxiv. p. 378

(1895).

Loc. Seychelles: “ Praslin, 1905, and from plantations at Grande Anse in 1908 ;

Félicité, from a plantation near the coast, 1908; Bird and Dennis Islands, 1908 ; Mahé,

Long Island, and from dry scrubby country below Morne Blanc, 1908. Amirantes:

Desroches, 1905.”

' Je Vai indiquée aussi de La Digue et de Mahé. J’ai vu deux exemplaires de Poivre

(Amirantes) et de Mahé qui pourraient peut-étre se rapporter & cette espece bien que

leur taille soit beaucoup plus forte.

BOLIVAR—ORTHOPTERA: ACRYDITD4, PHASGONURIDA, GRYLLIDA 271

Je suis obligé de changer le nom pusilla car il existait déji une Hpacromia pusilla

Walker.

14. Aolopus thalassinus (Fabricius), Spec. Ins., i. p. 367 (1781).

Loc. Coetivy, 1905. Europe, Nord d'Afrique, &c.

Je n’ai vu que trois exemplaires de cette provenance, dont les couleurs ne sont pas

fraiches et ne permettent pas de juger de la coloration des jamhes postérieures.

Gen. GASTRIMARGUS, Saussure.

15. Gastrimargus marmoratus (Thunberg), Mém. Acad. Pétersb., v. p. 232 (1815).

Loc. Aldabra, 1907 (Thomasset).

Espéce d'Afrique et d’Asie trés variable. L’exemplaire que j’ai examiné se rapproche

par sa taille et par la coloration des formes de Madagascar.

Gen. Locusta, Linné (Kirby).

16. Locusta danica Linné, Syst. Nat., (ed. x1.) i. p. 702 (1767).

Loc. Seychelles: ‘Mahé, 1905; Bird Island, 1908; Félicité, 1908; Praslin, planta-

tions at Grande Anse, 1908. Amirantes: Poivre, Desroches, d’Arros and Eagle

Islands, 1905.”

Je l'avais indiquée comme se trouvant a Praslin.

C’est lespéce commune en Europe; elle se trouve aussi en Afrique et en Asie et

s’étend jusqu’’ la Nouvelle Hollande, la Nouvelle Zélande et la Polynésie.

Gen. AcrotyLus, Fieber.

17. Acrotylus patruelis (Herrich-Schaeffer), Faun. Ins. Germ., clvi., Pl. XVIII.

(1838).

Loc. Aldabra, 1908—9 (Fryer).

Espéce de l'Europe méridionale qui se retrouve aussi en Afrique.

Gen. ConipopA, Saussure.

18. Conipoda aldabre Saussure, Abhandl. Senckenb. Ges., xxi. p. 632 (1899).

Loc. Aldabra, 1908—9 (Fryer). Cosmoledo, 1907 (Thomasset). Assumption, 1909

and 1910 (Dupont).

Le genre renferme une autre espéce, C. calcarata Sauss., de Madagascar, de |’Afrique

orientale et de l'Afrique occidentale.

Gen. RuyNncHoretrix, gen. nov. (Pl. 18, figs. 6, 7).

Corpus compressiusculum. Caput breviter conicum. Fastigium horizontaliter valde

productum, triangulare, acutum, cum vertice in eodem plano jacens, suleatum: intervallum

oculorum costa frontali haud vel vix latius. Frons valde reclinata, carinis lateralibus sat

divergentibus. Costa frontalis inter antennas modice elevata, marginibus subparallelis,

ante ocellum divergentibus obliteratis. Antennz filiformes, elongate. Pronotum capite

SECOND SERIES—ZOOLOGY, VOL, XV. 35

272 PERCY SLADEN TRUST EXPEDITION

vix longius, superne subcylindricum, sulcis impressis, sulco postico longe pone medium

sito, sulcis duobus ultimis per lobos laterales longe extensis; lobis deflexis elongatis,

margine inferiore antice obliquo pone medium obtusissime angulato. Elytra apicem

femorum posticorum vix attingentia, venis crassis, areolis in dimidio basali fortiter

impressis ; limbo costali anterius angustissime membranaceo, enervi. Femora postica

parum compressa, extus convexiuscula, ante apicem haud gracilescentia, carina dorsali

apicem versus obliterata et apice non producta; lobis genicularibus apice truncato-

rotundatis. Tibize posticee quam femora valde breviores, apicem versus haud ampliatze,

marginibus obtusis, spinis extus 7—8, intus 7, spina apicali externa nulla. Tarsi postici

elongati, articulo secundo primo dimidio breviore, articulo ultimo gracili, articulis duobus

primis unitis longiore. Tuberculum prosternale transversum, basi latum. Lobi meso-

sternales subtransversi, postice valde rotundati, inter se valde distantes; lobi metasternales

in ¢ sutura contigui, in ¢ leviter contigui. Abdomen cylindricum, in $ apicem versus

pilosum, segmento ventrali penultimo ¢? apice area nitida, subcallosa. Lamina

supraanalis ¢ trigona, elongata. Cerci attenuati, breves. Lamina subgenitalis conica,

obtusa. Valvulz ovipositoris elongate apice sinuatee.

Le placement de ce genre reste pour moi douteux et, malgré le défaut d’épine apicale

externe aux jambes postérieures, je crois qu’il doit étre placé dans la division 1 de

Brunner (Systéme des Orth.) ot il prendrait place & cdté des Cranaé Stal dont il a un

peu la forme, ou prés des Oxyiz (Racilia, Tauchira) par le deuxiéme article des tarses

postérieurs, de moitié plus court que le premier. Cependant et malgré ce dernier

caractére, je placerais provisoirement cet insect prés des Cranaé par suite de la caréne

frontale qui s’oblitére antérieurement, et par la longueur des antennes et des tarses

postérieurs, dont le dernier article est plus long que les deux premiers pris ensemble.

Les jeunes ont une coloration toute différente ; ils ont le corps d’un brun chatain,

roussatre vers le bas et le dos parcouru par une bande pale. Le fastigium du vertex est

tres aigu.

19. Rhynchotettia gardineri, sp. nov. (Pl. 18, figs. 6, 7).

Viridi-olivaceus. Oculi castanei. Fastigium inter oculos sulcatum, antice acutum

apice leviter declive. Antenne, articulis duobus basalibus ¢ vel articulis 4 vel 5 primis

exceptis, nigre. Costa frontalis inter antennas sulcata, ante ocellum coarctata, deplanata.

Caput superne punctato-seriatum. Pronotum vage punctatum, antice amplectens, sinua-

tum, postice breviter rotundato-productum ; metazona brevissima quarta parte pronoti

haud superante, minute impresso-punctata ; lobis deflexis marginibus inferiore et postico

anguste incrassatis, sinu humerali obtusissimo. Elytra angusta, rufescenti-violacea, venis

longitudinalibus flavescentibus vel virescentibus. Ale fusco-subviolaces. Femora

viridia, arcu geniculari externo nec non lobo geniculari interno nigris. Tibiz posticee

in ¢ ferruginez, in ¢ ccerulese vel externe virescentes, basi apiceque inferne obscuriores.

Long. corp. f 32; antenn. 19; pron. 5; elytr. 17; fem. post. 14 mill.

Long. corp. ? 40; antenn. 19; pron. 7; elytr. 21; fem. post. 17 mill.

Loc. Seychelles. ‘Mahé: Cascade, Morne Seychellois, etc. 1905; forest above

BOLIVAR—ORTHOPTERA: ACRYDIIDA, PHASGONURIDA, GRYLLIDA 273

Cascade (f and 2 in coitw), Mare aux Cochons district, etc., 1908—9. Silhouette: high

forests, 1908. This species was only found in the high mountain-forests, sometimes in

the highest and dampest parts.

N.B. Colour during life: head, pronotum, anterior and middle legs, and posterior

femora very brilliant green. Elytra with greenish-yellow veins, interstitial parts dark

with violet tinge. Wings delicate violet near the costa, the rest infuscate. Posterior

tibiee bright red in 9, in $ blue above and greenish-blue beneath, the apices of the spines

dark in both sexes.” —(H. Scorr.)

Gen. CaTantops, Schaum.

20. Catantops insulanus Karny, Sitz. der k. Akad. Wiss. Wien, 1907, cxvi.

pp. 319, 342.

Loc. Aldabra, 1907 et 1908—9. Assumption, 1909 (Dupont). Cosmoledo, 1907

(Thomasset).

Malegré les différences qu’offrent les exemplaires que j’ai examinés je crois bien qu ils

appartiennent tous 4 l'espéce de Karny. Les fémurs ont une tendance a avoir l’aire

externe obscurcie, mais je considére cette coloration comme produit d’une mauvaise

dessiccation ; la deuxitme des bandes dorsales des mémes fémurs ne se continue pas sur

Yaire externo-médiane. La partie inférieure de ces fémurs est noire et l’aréte inférieure

de l’aire interno-médiane est d’un roux sanguin, l’aire interno-médiane étant occupée par

une grande tache noire divisée ou presque divisée vers le milieu du fémur. L’espéce

n’était indiquée que de l'ile d’Aldabra.

21. Catantops axillaris (Thunberg), Mém. Acad. Pétersb., ix. pp. 399, 426 (1824).

Loc. Cosmoledo.

Exemplaire de grande taille avec les jambes postérieures jaunes tachées de noir, non-

coloriées de rouge 4 la face inférieure. Indiquée de Massaua, Zanzibar, Milanji et Sudsomali

dans la céte orientale d'Afrique ; elle se trouve aussi au Sénégal, iles du Cap Vert, &c., sur

la cdte occidentale. C'est trés prochaine de brunnert Karny.

Gen. CyrracantrHacris, Walker.

22. COyrtacanthacris tatarica (Linn.) Stal.

Loc. Assumption, 1909 (Dupont). Aldabra, 1907 et 1908—9. Astove, 1907.

Cosmoledo, 1907.

Exemplaires de taille et de coloration trés différentes. Je crois que c'est & tort que

Mr Kirby réserve le nom de tutarica pour Schistocerca peregrina Ol.

274 PERCY SLADEN TRUST EXPEDITION

Fam. Phasgonuride.

Gen. PHANEROPTERA, Serville.

23. Phaneroptera nana Fieber, Lotos, iii. p. 173 (1853).

Loc. Aldabra, 1908—9 (Fryer). Assumption, 1910 (Dupont). Cosmoledo, 1907

(Thomasset).

Cette espeéce se retrouve en Afrique et aussi dans l’Europe méridionale.

Gen. ALLopAPa, Brunner.

24. Allodapa rostrata Brunner, Mon. Phaneropt., p. 222 (1878).

Loc. Seychelles. ‘‘Mahé: Cascade Estate, 1905 and 1908—9; &c. Silhouette :

Mare aux Cochons, about 1000 ft., 1908; &c.”

Quatre exemplaires dont deux sont femelles, ce qui me permet de signaler ses

caracteres. Monsieur Brunner a donné les dimensions de la ?, mais c’est par erreur typo-

graphique, car il se référe au ¢.

@ Ovipositor pronoto duplo longior, sensim incurvus, levis, acuminatus, apicem

versus preecipue in latere infero crenulatus. Lamina subgenitalis fortiter transversa,

truncata, brevis.

Long. corp. ? 26; pron. 5,9; elytr. 37; fem. post. 19,5 ; ovipos. 11,9 mill.

Loc. Mahé, 1908—9; Silhouette, 1908.

Le rameau radiaire de |’élytre est simplement fourchu comme chez le ¢, tandis quil

est tri-rameux dans Allodapa aliena Brunner.

Gen. Pianeta, Stal.

25. Plangia ovalifolia, sp. nov. (Pl. 18, fig. 8).

Pallide virescens. Fastigium verticis foveolatum, articulo primo antennarum sesqui

latins, cum fastigio frontis lineola contiguum. Antenne fusca basin versus pallid.

Oculi fusci. Pronotum supra planum, antice sinuatum, postice rotundatum, medio

impressione lyrata instructum, linea longitudinali media haud distincta, canthis lateralibus

rotundatis; lobis deflexis altioribus quam longioribus, margine antico pone oculos sub-

sinuato, postico rotundato. Elytra ovata, margine postico fere recto, antico medio

distincte arcuato, pone medium anguste pallescenti ; venis radialibus contiguis, fere rectis ;

vena radiali antica prope basin distincte ampliata, ramo radiali vix ante medium oriente

et ante medium furcato; vena ulnari antica ramos parum distinctos versus marginem

posticum emittente; campo tympanali ¢ in elytro dextro speculo pellucido elongato,

postice a vena incrassata bene delineato, antice imperfecte terminato ; in elytro sinistro

rotundato sed haud producto, vena plicata callosa perfecte explicata; area ulnari areolis

minutis nigro-repletis prope venam analem ornata. Ale campo triangulari apicali non

producto. Femora marginibus haud dilatatis, antica spinis 4, intermedia 3 vel 4, postica

6 vel 7 armata. Tibiz antice supra haud sulcate, subcylindrice, postice sulcatee, basi

spinarum puncto fusco apposito. Segmentum anale postice truncatum. Lamina supra-

analis trigona, subzequilateralis, subtuberculata. Cerci distincte meurvi, apice fusci. 3.

BOLIVAR—ORTHOPTERA: ACRYDIIDA, PHASGONURIDA, GRYLLIDA 275

Long. corp. $22; pron. 4,5; elytr. 29; Lat. medio elytr. 10; long. fem. post.

14 mill.

Loc. Aldabra (Fryer).

C’est une des plus petites espéces du genre ; sa coloration est presque uniforme, d’un

jaune pale passant 4 verdatre sur les élytres qui sont signés le long de la veine anale de

trés petits points noirs qu’on peut a peine distinguer & I’ceil nu.

Les épines des jambes postérieures sont ornées d'un point noir 4 la base. Elle se

distingue de P. graminea du Cap par les organes anals; ses élytres de coloration

uniforme la distinguent de guttatipennis et de nebulosa Karsch ainsi que de segonoides

Butl., et ses jambes & bords non dilatés la séparent de laminifera Karsch. P. venata

Griff., c'est une espéce & taille plus robuste. Toutes les espéces habitent Madagascar ou

l Afrique.

Gen. CoNocEPHALOIDES, Perkins.

Conocephalus, auct.

26. Conocephaloides breviceps (Redtenbacher), Verh. zool.-bot. Ges. Wien, xh.

pp. 384, 417, pl. 3, fig. 42 (1891).

Loc. Chagos Islands, 1905: Egmont Atoll, Salomon Atoll, Diego Garcia, et

Peros Banhos.

La différence entre C. insulanus Redt., acuminatus Fabr. et breviceps Redt. n’est pas

toujours facile 4 établir et du reste le ¢ des deux premiéres espéces n’est pas connu. II

faudrait pouvoir examiner plusieurs exemplaires pour bien connaitre la variabilité de la

longueur du tubercule du vertex.

C. breviceps Redt. a été signalé & Ceylan, Pondichéry et & Java. On peut en dire

autant des relations du breviceps avec pallidus, dont la principale ditférence (comparez les

descriptions des deux espéces dans Redtenbacher, pages 100 et 103, (414—417)) en relation

avec acuminatus se trouve dans le bord des élytres, qui dans pallidus devrait avoir une

étroite marge noire qui manquerait dans breviceps, or dans l'un ou l’autre des exemplaires

de Chagos on peut distinguer des indices de cette ligne noire. I] faudrait done dépasser

de plusieurs exemplaires de diverses provenances pour établir d'une maniére définitive la

validité de toutes ces espéces.

27. Conocephalordes chagosensis, sp. nov. (Pl. 18, fig. 9).

Griseo-fuscus. Fastigium verticis dimidiam frontis longitudinem haud attingens,

conicum, superne leviter convexum, deplanatum apice obtusum, subtus pallidum, basi

distincte dentatum et a fronte divisum. Genz infuscate linea albida obliqua ornate.

Dorsum verticis et pronoti indistincte brunneo-lineatum ; lobi laterales fusciores, lineis

duabus prima mediana, secunda ad dorsum posita, pallidis, angulo antico obtusissimo,

postico obtuso et rotundato; margine inferiore obliquo nigro et albido-limbato. Elytra

femora postica valde superantia, margine antico nigro, campo radiali fusco vario. Pectus

vitta nigra longitudinali interrupta ornatum. Femora 4 postica subtus obscurata ; 2 antica

spinis duabus, intermedia spinis tribus, armata; postica gracilia spinis compluribus

armata. ¢.

276 PERCY SLADEN TRUST EXPEDITION

Long. corp. 3 30; fastigii 2; pron. 8,5; elytr. 40; fem. post. 21 mill.

Loc. Chagos Islands, 1905: Salomon Atoll.

Le vertex est plus court et moins pointu que dans C. lineatipes Bol.

28. Conocephaloides nitidulus (Scopoli), Del. Flor. Faun. Insubr., i. p. 62, Pl. 248

(1786).

Loc. Seychelles: Mahé, Silhouette, Dennis Island, 1908—9; Praslin, 1905.

C'est lespéce commune en Europe; elle se trouve aussi en Afrique et en Asie.

Gen. ANISOPTERA, Latreille.

29. Anisoptera iris (Serville), Ins. Orth., p. 506 (1839).

Loc. “Seychelles: found among grass in clearings and plantations from coast up to

1000 ft. ; Mahé, Silhouette, Praslin, Dennis Island. Amirantes: Poivre, 1905. Assump-

tion, 1910. Cosmoledo, 1907. Africa, Madagascar, Mauritius, &c.”

Je crois intéressante de donner la taille des exemplaires de ces provenances compara-

tivement aux dimensions que signale M. Redtenbacher.

Long. corp. $ 11,5; pron. 2,5; elytr. 15; fem. post. 12,5 mill.

Long. corp. $15; pron. 3; elytr. 19; fem. post. 16; ovip. 13 mill.

Long. corp. (d’apres Redt.) 13; pron. 2,6; elytr. 16; fem. post. 13 mill.

Long. corp. (d’aprés Redt.) ? 16—21; pron. 3—3,5; elytr. 21—25; fem. post. 17—

19; ovip. 15—17 mill.

J’ai vu encore des exemplaires de Praslin dont la taille ne dépasse pas 11,5 mill. On

n'a pas remarqué que je sache, la disposition singuliére des épines des tibias antérieures

chez le ¢, elles sont tout & fait couchées le long des bords, en sorte qu’elles ne sont

pas saillantes.

30. Anisoptera maculata (Le Guillou), Rev. Zool., 1841, p. 294.

Loc. Aldabra, 1908—9 (Fryer). Assumption, 1910 (Dupont).

L’espéce se trouve depuis le Gaboon et le Cap de Bonne Espérance jusqu’en Asie

et & l’Occident Indien.

31. Anisoptera conocephala (Linné), Syst. Nat., ed. x11, i. p. 696 (1767).

Loc. “Seychelles, Mahé (Long Island), 1908—9; Praslin, 1905; Coetivy, 1905.

Spain, Africa.”

Malgré ses élytres plus courts que les fémurs postérieurs et ses ailes qui ne dépassent

presque pas les genoux des mémes jambes, je considére ces exemplaires comme constituant

une variété 4 organes du vol raccourcis, tout & fait comme dans A. lugubris Redt., car les

genoux postérieurs sont concolorés et les cerci sont armés comme dans conocephala

(@thiopica Thunb.) avec un tubercule trés distinct prés de la base de la dent interne.

Comparés avec des exemplaires de provenances diverses, notamment avec ceux de Valence

(Espagne), je ne trouve pas d’autres différences.

BOLIVAR—ORTHOPTERA: ACRYDIIDA, PHASGONURIDA, GRYLLIDAi 277

Gen. Puisis, Stal.

32. Phisis visenda, sp. nov.

Pallide flavescens. Oculi brunnei. Pronotum dorso lineis duabus sanguineis limbatum ;

lobis deflexis parallelis, elongatis, postice haud vel indistincte amplhatis. Elytra viridia,

campo anali fascia longitudinali flava atque margine postico rufo. Ale hyaline, antice

virescentes, speculo fusco-marginato. Prosternum bispinosum. Mesosternum tuberculo

utrinque elevato, apice crasse rotundato, instructum. Metasternum haud tuberculatum,

tantum lateribus obtuse productis. Femora antica intus extusque 5-spinosa ; intermedia

extus 4-, intus 1-spinosa ; postica extus spinis 10 parvis, intus spinis minutis 6—8 armata.

Tibize anticze utrinque spinis 7 magnis, apicem versus decrescentibus, in $ fortioribus quam

in 2; intermedize utrinque 6-spinosee, superne inermes. Segmentum anale ¢ magnum,

basi sulcatum, apice truncatum, medio excisum. Lamina supraanalis parva, trigona.

Cerci recti apicem versus sursum curvati atque depressiusculi, basi ampliati et intus

dente retrorsum directo armati. Lamina subgenitalis postice rotundata, inter stylos

circulariter sinuata. Lamina subgenitalis ? transversa postice truncata. Ovipositor

incurvus, apice acuminatus, basi subtus utrinque distincte angulato-amplhatus.

Long. corp. ¢ 18; pron. 4,5; elytr. 23; fem. ant. 9,5; post. 17 mill.

Long. corp. ? 22; pron. 5,5; elytr. 28; fem. ant. 10,5; post. 20; ovip. 13 mill.

Loc. ‘Seychelles, 1908—9. Mahé: Cascade Estate, about 800 ft.; near Morne

Blanc, about 800 ft.; Morne Seychellois, over 1500 ft. Silhouette: Mare aux Cochons,

about 1000 ft.”

Espéce plus prochaine de pectinatus, espece océanique, que de dwmosa qui habite

lV Afrique. Elle différe beaucoup de spinifera de Vile Rodriguez. C'est une espéce trés

remarquable par la coloration dont on peut juger suffisamment par un des exemplaires

qui est tres bien conservé.

Gen. GRYLLACRIS, Serville.

33. Gryllacris sechellensis Bolivar, Ann. Soc. Ent. France, lxiv. p. 379 (1895).

Loc. Seychelles. “Mahé: from forest above Cascade Estate, from near Morne Blane,

&e. 1905 and 1908—9. Silhouette: mountain-forest, 1908. Praslin, 1905.”

34. Gryllacris fryert, sp. nov.

Colore griseo-testaceo. Statura parva. Caput pallidum. Fastigium verticis articulo

primo antennarum haud vel vix latius, marginibus antice parallelis superne utrinque

subsinuatis. Pronotum antice supra caput leviter rotundato-productum, sulcis expressis

profundis, margine postico truncato ; lobis lateralibus postice valde altioribus quam antice,

margine postico valde sinuato, perpendiculari, margine inferiore obliquo, supra coxas

obtuse angulato. Elytra apicem oviscapti superantia, venis venulisque concoloribus.

Alz dilute succinez, venis fuscioribus, magne, triangulares, elytris longiores. Pedes

unicolores, pilosi et fulvo-tomentosi. Femora antica intus, intermedia et postica in

latere externo, striga ferruginea plus minusve distincta. Tibize anticz spinis pallidis sat

longis, decrescentibus. Femora postica spinis brevibus sed fortibus, apice nigro, 6—7

278 PERCY SLADEN TRUST EXPEDITION

utrinque armata. Tibiz posticee levissime incurvee, spinis minutis apice castaneo intus

extusque in latere superiore armatze. Tarsi pallidi. Ovipositor angustus, linearis, incurvus,

pallide castaneus, margine inferiore pallidiore. 9.

Long. corp. ? 19; pron. 3; elytr. 26,5; fem. post. 11; ovipos. 10 mill.

Loc. Aldabra, 1908—9 (Fryer).

Cette espéce appartient au groupe GG du Prospectus du Dr Griffini (1910, Zool.

Anzeiger, Band xxxv. No. 16, p. 509) et elle se distingue bien par sa téte toute pale.

Je remercie bien le Dr. Achille Griffini, le savant connaisseur des Gryllacridide, de

m’avoir renseigné sur la validité de cette espéce avec sa bienveillance accoutumée.

Fam. Gryllide.

Gen. Curtinia, Oken.

Gryllotalpa, Latreille.

35. Curtilla africana (Pal. de Beauv.), Ins. Afr. Amér., p. 229, pl. 2¢, f. 6 (1805).

Loc. “Chagos Islands: Egmont and Peros Banhos, 1905. Aldabra: Takamaka, 1907.

Seychelles: Mahé, 1905 and 1908—9. Africa, Asia, etc.”

J’ai signalé cette espéce de la Digue d’ot j’en ai vu un exemplaire tout petit prove-

nant des chasses de M. Alluaud.

Gen. Scorria, gen. nov. (Pl. 18, figs. 10, 11).

Corpus apterum, pilosum, setis singulis sparsis. Caput breve. Vertex deflexus.

Frons inter antennas producta parum compressa, articulo primo antennarum subzeque

lata. Antenne longze, corpore duplo longiores. Oculi elongati subtriangulares. Ocelli

pallidi in trigonum dispositi, laterales parum perspicui ab oculis distantes. Clypeus

convexus. Palpi articulo ultimo infundibuliformi, penultimo longiore. Pronotum sub-

cylindricum, superne depressiusculum, linea media longitudinali plus minusve impressa ;

lobis deflexis elongatis, antice altioribus. LElytra aleeque nulla. Tibiz anticee in latere

postico foramine aperto vel nullo, calcaribus brevibus. ‘Tarsi antici tibiis parum breviores,

articulo primo longissimo. ‘Tibize posticee cylindricze apicem versus leviter ampliate et

crassiores, haud serrulatee, in parte dimidia apicali spinis longis intus 2 vel 3, extus 38,

mobilibus armatze ; calcaribus internis binis primis validis, primo longiore. ‘Tarsi postici,

articulo primo superne cylindrico, inermi, articulo secundo compresso, cylindrico. Cerei

longi, pilosi. Ovipositor rectus, femoribus posticis haud longior.

Ce genre appartient & la tribu des Nemobites par la disposition des jambes

postérieures, cependant il a la facies des Gryllomorpha. Le ¢ de S. chagosensis est

peut étre ailé puisque la ¢ porte des tympanes tibiales, mais la ¢ est tout a fait aptére

de méme que le ?# et la ? de la deuxiéme espéce. Dans les deux espéces tout le corps est

couvert d'une villosité grisitre et orné de longs poils noirs épars et rares; les jambes sont

couvertes de petits poils noirs couchés, plus longs sur les éperons.

Je dédie ce genre si intéressant au savant conservateur des collections zoologiques

du Musée de Cambridge qui l’a découvert, ayant puissamment contribué a la connaissance

de la faune des Seychelles.

BOLIVAR—ORTHOPTERA: ACRYDIIDA, PHASGONURID®, GRYLLIDA 279

36. Scottia chagosensis, sp. nov. (Pl. 18, fig. 10).

Statura parva. Corpus pallide testaceum griseo-villosum, pilis nigris obsitum.

Oculi fusci. Caput inter oculos pilis nigris subseriatis ornatum. Pronotum antice postice-

que pilis fimbriatum, postice haud constrictum. Pedes pallidi, pilis raris, nigris, longis,

sparsis. Tibize posticze extus 3, intus 2 spinis mobilibus armate. Tarsi postici articulo

primo duobus sequentibus simul sumptis valde longiore. Cerci longe pilosi. Ovipositor

subrectus, leviter sursum directus. Lamina subgenitalis medio sinuata. Segmentum

ultimum abdominis truncatum, angulis haud productis. Lamina supraanalis trigona,

parva.

Long. corp. 2? 7; pron. 1,5; fem. post. 4,5 mill.

Loc. Chagos Islands: Salomon Atoll, Boddam, 24. V. 1905.

37. Scottia salticiformis, sp. noy. (Pl. 18, fig. 11).

Statura pusilla. Colore pallide brunneo, fusco-vario. Nigro-villosa atque longe

setosa. Antenne nigre. Pronotum postice constrictum fusco-variegatum, lateribus

longe nigro-setosis. Pedes fusco-annulati. Tibize anticee tympano nullo. Tarsi antici

articulo primo ceteris junctis longiore. Tibize posticee distincte incurve, tarsis haud vel

vix longiores, supra utrinque spinis tribus mobilibus. Metatarsus posticus articulis duobus

apicalibus simul sumptis distincte longior; articulus apicalis niger, unguiculis pallidis.

Ovipositor castaneus, femoribus brevior.

Long. corp. $? 4,5; pron. 1; fem. post. 3,2; ovip. 2,8 mill.

Loc. ‘Seychelles. From the high forests. Mahé: summit of Morne Pilot, over

2000 ft.; between Trois Fréres and Morne Seychellois, 1500—2000 ft.; Mare aux Cochons

district ; Cascade Estate. Silhouette: highest forest, sometimes over 2000 ft.”

Jolie espéce ressemblant au premier abord une araignée du g. Salticus par son corps

trapu &e.

Gen. Acueta, Linné.

38. Acheta bimaculata (De Geer), Mém. Ins., i. p. 521, pl. 43, f. 4 (1773).

LTnogryllus bimaculatus Saussure, Mém. Soc. Geneve, xxv. p. 139 (1877).

Loc. ‘Seychelles: from the lower, cleared country; Mahé, Silhouette, Praslin, Bird

Island. Assumption, 1910 (Dupont). ?Cosmoledo, 1907 (Thomasset). ?Amirantes,

Poivre, 1905. Cargados Carajos, 1905: many labelled Establishment Island. ‘lhe

Cargados specimens all with one exception belong to the form with pale elytra: those

from the other islands are all of the ordinary form.”

J’ai vu un exemplaire typique et une variété 4 élytres pales et 4 pronotum finement

ourlé de rougedtre. J’en avais déji signalé lespece de Mahé, provenant des chasses de

M. Alluaud. C'est l’espéce commune en Afrique et dans une partie de I’Asie, elle s’étend

jusqu’aux iles Philippines.

SECOND SERIES—ZOOLOGY, VOL. XV. 36

280 PERCY SLADEN TRUST EXPEDITION

Gen. ORNEBIUS, Guérin.

39. Ornebius validus (Bolivar).

Liphoplus validus Bolivar, Ann. Soc. Ent. France, vol. lxiv. p. 382 (1895).

Loc. Chagos Islands : Salomon Atoll et Peros Banhos, 1905. Seychelles: Praslin, 1905.

J’avais décrit cette espéce par des exemplaires ? provenant de Mahé qui ne me

semblent pas différer de ceux des iles Chagos; ces derniers me permettent de modifier

quelque peu la diagnose parce qu’ils sont mieux conservés.

La tuméfaction frontale est ornée d’une ligne rousse anguleuse de chaque cété, et

n'a pas de sillon médian, qui n’est représenté que par une ligne trés fine et 4 peine visible ;

la lame suranale est brundtre au milieu et entiére, et l’oviscapte peut étre tout a fait

droit. Les cerques dépassent 15 mill.

40. Ornebius syrticus, sp. nov.

Colore pallide testaceo. Corpore cinereo-squamoso. Faciei tumor valde productus,

articulo primo antennarum distincte latior, linea media impressa parum distincta. Antennze

unicolores, pallidze, griseo-villosze. Palpi concolores. Pronotum deplanatum, retrorsum

sensim ampliatum, postice subrotundato-productum, margine postico griseo-squamoso.

Elytra pronoto subbreviora, succinea, usque ad medium abdominis producta, postice

ferrugineo-limbata, venis sat distinctis, speculo magno, subtrigono, antice rotundato,

campo marginali fascia lata sanguinea. Pedes pilis rufis raris sparsis. Tibize antice

tympano minuto rotundato in margine antico munite. Tibi posticee supra deplanate

utrinque minute serrulate. Metatarsus posticus serrulatus. Abdomen nigrum, griseo-

squamosum.

? Pronotum antice posticeque subtruncatum. Elytra nulla. Ovipositor rectus vel

subdecurvus, castaneus.

Long. corp. $7; pron. 2,2; elytr. 2; fem. post. 4; tib. post, 2,8 mill.

Long. corp. 8; pron. 1,8; elytr. 0; fem. post. 4,5; tib. post. 3 mill.

Loc. Farquhar Atoll, 1905. Aldabra, 1908—9 (Fryer). Seychelles: Dennis Island,

1908.

Il est de la taille du O. novare Sauss. dont il est aussi trés voisin, mais le sillon rostral

est a peine imprimé, le corps est peu pubescent et couvert d’écailles, notamment le long du

bord postérieur du pronotum et sur l’abdomen. Les élytres s’étendent jusqu’au milieu de

Yabdomen ayant leur bord postérieur rougedtre et les veines trés distinctes; la surface

du miroir est rugueuse. Les pattes sont plus courtes que dans l’espéce de l’Océan

Pacifique. Les autres espéces de Ornebius différent par la coloration ou par la forme

du pronotum et le développement des élytres, de sorte qu’on ne peut pas les confondre.

Le pronotum est beaucoup plus large postérieurement ainsi que les élytres que dans

O. flavipalpis Kirby de Christmas Island, et l’oviscapte est plus court que dans cette

espéce.

41. Ornebius elegantulus, sp. nov. (Pl. 18, fig. 12).

Colore rufo-testaceo. Corpus squamulosum, et pilosum. Faciei tumor valde pro-

ductus, articulo primo antennarum subangustior, linea impressa plerumque parum distincta.

BOLIVAR—ORTHOPTERA: ACRYDITDA, PHASGONURIDA, GRYLLIDAR 281

Antenne remote et anguste fusco-annulate. Pronotum in g deplanatum postice rotun-

dato-productum, rufescens, margine postico squamulis pallidis fimbriatum. ¢ Elytra pallide

testacea, postice fascia lata fusca terminata, pronoto longitudine subsequantia, speculo

trigono antrorsum angustato antice rotundato, strigoso, venis obliquis duabus; campo

laterali fusco-nigro extus pallide limbato. Pronotum in ? retrorsum parum ampliatum,

longius quam latius, postice subtruncatum. ¢ Elytra nulla. Pedes utriusque sexus pallidi.

Tibize posticee supra deplanatze, canthis serrulatis. Abdomen rufescens. Cerci longi.

Ovipositor femoribus posticis brevior.

Long. corp. $ 10; pron. 3,2; elytr. 2,2; fem. post. 6 mill.

Long. corp. 2 11; pron. 2; elytr. 2,2; fem. post. 6; ovip. 5 mill.

Loc. ‘Seychelles. Most of the specimens were beaten from trees in the mountain-

forests of Silhouette, VIII.—IX. 1908 (near Mt Pot-i-eau, about 1500 ft., and Mare aux

Cochons, 1000 ft.). Mahé: Cascade Estate, I. 1909; Long Island, VII. 1908.”

Plus grand que O. syrticus, roussitre avec la bande postérieure des élytres grande et

noire, l’abdomen roussitre et la protubérance faciale 4 peine aussi large que le premier

article des antennes.

42. Ornebius succineus, sp. nov.

Colore pallide testaceo. Griseo-villosus atque squamulosus. Faciei tumor valde

productus, articulo primo antennarum subzequalis, utrinque linea rufa interrupta ornatus,

linea media tenuiter impressa. Antennze corpore concolores, remote et anguste fusco-

annulate. Palpi maxillares apice nigri. Pronotum ? retrorsum leviter ampliatum, depres-

siusculum, postice parum productum, rotundatum, squamulis fimbriatum, haud pictum.

Elytra apicem pronoti parum superantia, succinea, postice anguste fusco-marginata, campo

laterali pallido. Pedes pallidi, articulo secundo tarsorum fusco. ‘Tibize posticze superne

deplanatz, canthis serrulatis. Abdomen rufescens, griseo-squamosus.

Long. corp. $ 11; pron. 2,8; elytr. 1,2; fem. post. 6,5 mill.

Loc. “Seychelles. Silhouette: lower country, IX. 1908. Mahé: Anonyme Island,

I. 1909.”

Espéce voisine de O. nigripalpis Guér. mais 4 taille plus grande, avec les élytres

moins développées n’arrivant pas d la moitié de la longueur du pronotum ; celui-ci est en

méme temps moins développé et unicolore. L’abdomen est de la couleur du reste du corps.

Du O. xanthopterus Guér. différe aussi par un plus faible développement des élytres et par

la couleur des jambes et de l’abdomen, des antennes et des palpes.

Cette espéce ressemble beaucoup par sa coloration 4 O. validus Bol. & tel point qu’on

pourrait croire qu'elle en est la 2, mais les palpes dans O. validus sont pales dans toute leur

longueur.

Gen. EctatTopErus, Guérin.

43. Ectatoderus nigriceps, sp. nov.

Castaneus, griseo-squamosus. Faciei tumor magnus, transversus, a capite linea levi

divisus ; linea media longitudinali distincta. Antenne articulo basali parvo, quam tumore

faciali quinta parte minore. Pronotum antice suaviter sinuatum, postice supra

36—2

282 PERCY SLADEN TRUST EXPEDITION

thoracem extensum, rotundatum; lobis lateralibus nigro-pictis. Elytra sub pronoto

abscondita, nigro-maculata. Pedes breves, pallide grisei, brunneo-marmorati. Tibiz

posticee superne deplanatee, canthis serrulatis ; metatarsus posticus magnus, superne utrinque

serrulatus, dimidio tibiarum longior: articuli 2, 3que tarsorum posticorum minuti.

Abdomen griseum; cerci crassi, longe pilosi, castanei. ¢.

Long. corp. ¢ 5,5; pron. 2,5; fem. post. 3 mill.

Loc. Aldabra, 1908—9 (Fryer).

Semblable au /. pallidigeniculatus Brunn. plutot qu’au veltzkowi Sauss. de Nossi-Bé

par la taille, la coloration et la forme du pronotum, ayant de méme les élytres cachés sous

le pronotum ; c'est par ce caractére qu'il différe des autres espéces.

44, Ketatoderus squamiger, sp. nov.

Major, griseo-subargenteo-squamosus. Caput castaneum, squamis obtectum, antice

nigro- et carneo-varium, antrorsum sensim angustatum. Faciei tumor magnus, transversus,

articulo basali antennarum duplo latior, a capite linea tenui divisus, sulco longitudinali

distincto. Antennze brunneze, articulo primo nigro. Pronotum longius quam latius,

antrorsum angustatum, postice truncatum; lobis deflexis vitta longitudinali nigra pone

oculos oriunda. Pedes pilis fuscis sparsis, griseo-squamosi, fusco-variegati. Femora

postica extus pallida, superne fusco-strigata. Tibize posticee fere rectee. Metatarsus

posticus dimidio tibiarum distincte brevior. Cerci longi, castanei apicem versus fusci.

Ovipositor rectus. 9.

Long. corp. ? 9; pron. 3,2; fem. post. 6,5; ovip. 5,5 mill.

Loc. Aldabra, 1908—9 (Fryer).

Beaucoup plus grand que l’antérieur, 4 téte brune bordée de noir, de méme que

le pronotum qui offre de chaque cdté, le long du bord supérieur des lobes latéraux, une

bande noire; les jambes postérieures de couleur pale avec des lignes longitudinales

paralléles le long du bord supérieur de la face externe.

Je ne pense pas qu'elle puisse étre la ? de l’espéce précédente par les différences

signalées, par la forme de la téte dont le tumor facialis est moins fortement transverse

et la ligne divisoire longitudinale trés visible.

Gen. PENTACENTRUS, Saussure.

45, Pentacentrus nigrifrons, sp. nov. (Pl. 18, figs. 13—15).

Gracilis, dilute griseo-testaceus, griseo-villosus atque pilis nigris sparsis. Ocelli griseo-

testacei. Palpi pallidi, articulo ultimo trigono apice valde oblique truncato. Antenne,

articulis duobus primis fusco-nigris exceptis, griseo-testaceze. Pronotum dorso planiusculum

subtransversum antrorsum angustatum, antice truncatum postice obtusissime angulatum

vel subarcuatum, pilis rufescentibus fimbriatum ; lobis lateralibus valde elongatis, fuscioribus,

margine inferiore horizontali. Elytra abdomen totum tegentia, angusta: in # dispositionis

venarum forma insolita, in parte tertia antica vena transversa valde impressa campum analem

a campo discoidali dividente, venis obliquis nullis; parte dimidia postica extus ad venam

mediam areola polygonia magna, denique venis tribus irregularibus longitudinalibus versus

BOLIVAR--ORTHOPTERA: ACRYDIIDA@, PHASGONURIDA, GRYLLID A 283

apicem elytri excurrentibus ; speculo nullo; campo laterali venis quattuor longitudinalibus

subparallelis ; spatio inter venam medianam et venam humeralem lato, per venas spurias

diviso: in ? in longitudine elevato-quadrivenosa, venis transversis parum distinctis. Ale

longe caudate, transverse fusco-strigatze. Pedes breves. Tibize antice utrinque tympano

instruct; tibiee intermediz usque ad apicem distincte incrassatee. Femora postica elonga-

to-ovata, parte filiformi apicali nulla. Tibize postice compress superne planatze, marginibus

denticulatis, spinis utrinque tribus in parte tertia apicali insertis, spina apicali interna

a calcaribus distante; calcaribus internis tantum duobus subeeque longis; calcaribus

‘externis tribus, brevioribus, sed intermedio longiore. Metatarsus posticus compressus,

superne in utroque margine denticulatus, spina apicali interna magna; articulus secundus

tarsorum crassiusculus. Cerci filiformes, longissimi. Ovipositor rectus, gracilis, apice

acutus.

Long. corp. ¢ 11; pron. 1,5; elytr. 9,2; fem. post. 6,5; cere. 17 mill.

Long. corp. ? 12; pron. 1,8; elytr. 10; fem. post. 7,5; ovipos. 6 mill.

Loc. ‘Seychelles, 1908—9. Only from the mountain-forests. Mahé: above

Cascade; near Morne Blanc; between Trois Fréres and Morne Seychellois, 1500—

2000 ft. Silhouette.”

La coloration uniformément d’un gris jaundtre et la taille plus grande, distinguent

cette espéce au premier abord de P. pulchellus Sauss., mais il y a bien d'autres ditférences,

telles que la couleur noire de la téte (fig. 13) qui n’est jaundtre qu’en arriére des ocelles ; la

coloration pile du dernier article des palpes maxillaires qui est en méme temps trés large 4

son extrémité par suite d’étre trés obliquement tronqué, en sorte que l'un des cétés est de

moitié plus long que l’autre et aussi long que la partie tronquée; Toviscapte droit et

notamment la longueur extraordinaire des cerques (fig. 15) qui sont plus d’une fois et demie

aussi longs que le corps. Les males des Pentacentrus n’étant pas connus il est nécessaire

d’exposer les différences qu’ils offrent avec la plupart des insectes de cette tribu. Leur

tambour n’est pas développé, mais il y a cependant une différence assez grande entre |’élytre

des $ (fig. 14) et celui des ?. Ces derniéres se comportent comme dans pulchellus ; quant aux

miles ils offrent une division dans une partie basale et une autre apicale établie par une veine

transversale droite et assez enfoncée ; la partie apicale étant du double plus longue que la

basilaire. Cette veine divisoire pourrait ¢tre la veine anale qui serait paralléle 4 la veine

discoidale depuis la base de l’élytre, puis s’écartant brusquement en angle droit pour

arriver au neeud musical; dans cette partie basilaire on distingue deux veines axillaires

paralléles longitudinales, dont l’interne brisée en angle obtus arrive aussi au nceud musical,

l’externe se reliant 4 la veine anale par un petit trait oblique; dans la partie apicale on

distingue deux cordes prés du bord postérieur de |’élytre mais presque droites et suivant

une direction parfois paralléle 4 ce bord, se prolongeant jusqu’d l'apex de l’élytre; une

troisiéme veine partant aussi du nceud mais divergeant des antérieures (veine diagonale),

se terminant.au milieu de I’élytre en se divisant en deux branches qui divergent en angle

droit, dont l'une se joint 4 la premidre corde et l'autre se continue en se brisant en angle

obtus jusqu’A la veine discoidale ; en avant de celle-ci l’on voit une grande aréole polygonale

limitée en avant par une veine brisée en angle obtus, et du cdté extérieur par une veine

284 PERCY SLADEN TRUST EXPEDITION

assez forte, un peu sinueuse, qui part de la base et que je crois étre une deuxiéme veine

discoidale ; cette veine s’interrompt en ce lieu; le reste de la partie apicale est simplement

parcouru par une veine longitudinale qui se continue jusqu’d l’'apex de lélytre, formant

une aire allongée avec la premiére corde, qui va se rétrécissant vers l'extrémité et qui est

divisée par une veine qui se rélie & la premiére corde vers le tiers postérieur de l’élytre.

Le champ latéral est limité en haut par une veine discoidale qui forme avec lhumérale

une large bande parcourue depuis la base jusqu’au milieu par une veine médiane qui se

perd vers le tiers postérieur de I’élytre; il y en a en outre quatre veines axillaires

paralléles ou divergentes vers l’extrémité avec la veine humérale et dont la premiére

arrive J la base mais presque unie & cette veine. Les ailes sont hyalines mais elles ont

une bande discoidale opaque et ornée de lignes brunatres vers l’extrémité; c’est cette

partie qui dans le repos couvre le reste.

Le genre Pentacentrus n'est connu que de Ceylan, car P. tenellus Karsch de

Cameroon a été séparé de ce genre par la présence de cing épines sur le c6té extérieur

des derniéres jambes, et forme maintenant le genre Pentacentrodes Bol. dont les males

ont les élytres exactement conformés comme ceux des femelles. La trouvaille qu’a fait le

Professeur Gardiner d'un genre nettement indien aux Seychelles est donc intéressante en

méme temps qu'elle nous permet de connaitre la conformation spéciale des élytres dans les

males des Pentacentrus. Un autre genre prochain serait, d’aprés Mr Kirby, le genre

Salmania Walk., mais il est difficile de juger des relations de ce genre par la description

qu’en donne Walker.

Gen. GRYLLAPTERUS, gen. nov. (Pl. 14, fig. 16).

Corpus depressiusculum. Caput a supero visum transversum, antice fortiter declive,

infra oculos valde obliquum, breve. Frontis rostrum basi lateribus haud sinuatum,

antrorsum sensim angustatum, articulo primo antennarum haud latius. Ocelli in trigonum

subeequilaterale dispositi, omnes a supero discreti, ocello antico ab apice rostri distante.

Oculi ovales oblique positi. Palpi breves, articulo apicali articulo penultimo parum sed

distincte longiore, apicem versus ampliato, apice oblique truncato. Pronotum transversum,

antice posticeque truncatum, canthis rotundatis; lobis deflexis medio subinflatis, trape-

zoidalibus, margine inferiore parum obliquo, retrorsum ascendente, antice rectangulatis.

Elytra aleeque nulle. Pedes breves compressiusculi. Femora postica valida apicem

versus sensim attenuata, parte apicali filiformi subnulla. Tibiee anticee tympano nullo;

intermedi spinis apicalibus 3; posticee haud curvatee apicem versus robustiores, superne

haud sulcate, basi preecipue in margine externo minute spinosz, in utroque margine

spinis 4 magnis instructe, canthis inter spinas, cantho externo inter spinas primas

excepto, inermibus; apice calcaribus intus 3, extus 3 armatez: in latere interno

calcaribus duobus superioribus maximis; in latere externo calcare intermedio longiore.

Metatarsus elongatus, metatarsus posticus superne extus denticulatus, intus tantum

spina apicali armatus. Articulus secundus tarsorum minutus, compressus. Ovipositor

rectus, valvulee apice acuto haud denticulate. Cerci longi, pilosi.

Ce genre a des rapports avee Gryllomorphus, mais je crois devoir le placer & coté du

g. Landrevus Walk. dans la tribu des Cicanthiens, parce que les jambes postérieures ont

BOLIVAR—ORTHOPTERA: ACRYDITDA, PHASGONURIDA, GRYLLIDA 285

leurs bords et notamment le bord externe denticulés, non seulement 4 la base, mais aussi

entre les deux premiéres épines.

La forme de la téte est bien différente de celle des CEcanthiens, car en examinant

linsecte du cdté supérieur, elle apparait tout 4 fait transverse; en la voyant de cdté

on s'apercoit que le front descend obliquement jusqu’d la partie proéminente du rostre,

changeant dans cet endroit de direction et devenant oblique jusqu’au labre ; le rostre se

forme d’une maniére insensible, n’étant pas émarginé de chaque cdté & la base, ni sillonné

transversalement du cdté supérieur. Les ocelles tous placés dans le plan supérieur sont

disposés en triangle presque équilatéral, et les postérieurs sont assez éloignés des yeux,

leur distance jusqu’au bord de l’orbite est un peu moindre que celle qui les sépare de la

ligne médiane du front. Le pronotum est tout a fait transverse et les cdtés apparaissent fort

convexes par suite d’une élévation ou gibbosité peu saillante des lobes latéraux.

46. Gryllapterus tomentosus, sp. nov. (Pl. 14, fig. 16).

Fuscus vel fusco-niger ; fusco-tomentosus atque pilosus. Caput testaceo-ferrugineum

fusco-varium. Antennze basi ferrugineze. Pronotum disco nec non lobis lateralibus fuscis,

canthis tantum testaceis. Pedes obscure ferruginei, fusco-variegati. Tibize fusco-

annulate. Calcar superum internum tibiarum posticarum intermedio sublongius, calcar

intermedium griseo-villosum. Abdomen superne fusco-nigrum. 9.

Long. corp. $, 9; pron. 2; fem. post. 7; tib. post. 5,5; ovip. 6,2 mill.

Loc. ‘Seychelles. Silhouette: near Mt. Pot-d-eau, about 1500 ft., VIII. 1908.”

Gen. PHmocRYLuus, gen. nov. (PI. 14, fig. 17).

Corpus crassum, apterum. Caput parvum. Frontis rostrum productum, articulo

primo antennarum subangustius, ocello antico in ejus apice antrorsum exserto ; ocelli

postici basi rostri siti, inter se minus quam ab ocello antico distantes. Antenne graciles.

Palpi articulis elongatis linearibus, articulo apicali prope apicem dilatato, propter hoc

extus sinuato. Pronotum transversum antrorsum angustatum, dorso planiusculo, antice

posticeque truncato; lobi deflexi obliqui, angulo antico late rotundato, margine infero

retrorsum ascendente. Mesonotum pone marginem posticum pronoti utrinque ad locum

alarum incisura rimata instructum. Pedes breves compressi. Femora postica basi

latissima apicem versus sensim angustata, parte apicali filiformi subnulla. Tibize anticze

intus extusque tympano minuto instructs, apice calcaribus duobus armatze. Tibize

posticee compressze, superne sulcatze, marginibus basi et in latere interno, inter spinas

ultimas excepto, serratis, utrinque spinis 4 apice uncinatis, in latere interno spina ultima

in apice tibiarum sita ; calcaribus 6, intus 3, extus 3, duobus superioribus internis multo

longioribus; in latere interno calcare intermedio distincte longiore. Metatarsus

posticus superne in latere externo tantum spinosus; articulus secundus tarsorum

posticorum compressus; metatarsus posticus articulis duobus ultimis tarsorum simul

sumptis sesqui longior. Cerci longi et longe pilosi. Ovipositor linearis, angustissimus,

apice acuto, haud dentato.

Dans le Systéme de Saussure ce genre se range parmi les Gcanthiens Phalangopsites

et doit se placer 4 cété des Paragryllus par ses fémurs postérieurs non amincis

286 PERCY SLADEN TRUST EXPEDITION

lextrémité et ses jambes antérieures pourvues de tympans des deux cdtés. Malgré cela,

laspect de cet insecte est tout a fait celui d'un Phalangopsis & pattes trés courtes.

47. Pheogryllus fuscus, sp. nov. (Pl. 14, fig. 17).

Fuscus, griseo-tomentosus. Antenne ferrugineo-testaceze, articulo primo _ lato,

castaneo. Tibize posticse calcare supero interno intermedio longiore. .

Long. corp. ? 18; pron. 4,5; fem. post. 15; tib. post. 13,5; tars. post. 4; ovipos.

15 mill.

Loc. “Seychelles. Silhouette, VIII. 1908: Mahé, Cascade Estate, IT. 1909.”

Gen. SEYCHELLESIA, gen. nov. (Pl. 14, figs. 18—20).

Corpus depressiusculum. Caput transversum ab antico posticoque compressum.

Oculi exserti perpendiculariter positi, inferne elongati et angustati.. Frontis rostrum inter

antennas productum, angustum, articulo primo antennarum haud latius ; ocello antico in

ejus apice a supero distincto, ocellis posticis inter se parum distantibus, ab ocello anteriore

magis distantibus. Antenne graciles, fragiles. Palpi breves, articulo apicali articulo

penultimo parum longiore, prope apicem ampliato, propter hoc margine antico sinuato.

Pronotum leviter transversum, depressiusculum, disco ineequali antice posticeque truncato,

canthis ante medium transverse impressis; lobis deflexis verticaliter insertis sed canthis

rotundatis, triangularibus, angulo antico obtusato, margine inferiore retrorsum oblique

ascendente. Elytra subcornea, abbreviata, intus basi tangentia deinde dehiscentia.

Alze nullee. Pedes modice elongati, compressi. Femora postica apicem versus angustata,

subfiliformia. Tibize anticee intus tympano (excepta S. Jlongicercata) instructee.

Metatarsus anticus elongatus, articulis binis ultimis simul sumptis longior. Tuibize postice

superne sulcatee, marginibus fere a basi denticulato-spinosis, in dimidio postico intus

extusque spinis quattuor, cantho interno inter ultimas spinas haud serrato, spina ultima

interna in apice sita, externa ab apice remota: calcaribus duobus superioribus internis

elongatis, dimidium metatarsi attingentibus, superiore sublongiore; calcaribus externis

minoribus, intermedio magis elongato. Metatarsus posticus superne in margine externo

tantum spinosus, spinis apicalibus longis sed spina interna longiore. Articulus secundus

tarsorum compressus. Cerci longi, pilosi. Ovipositor rectus, apice acutus, haud

denticulatus.

Prochain de Phalangacris mais & palpes de moitié plus courts et ayant le dernier

article fortement dilaté i l’extrémité, le pronotum déprimé en dessus. Les élytres déhis-

cents en arriére avec des nervures en général droites et & champ latéral bien développé ;

dans Phalangacris ce champ est rudimentaire. Les pattes plus courtes et 4 métatarse bien

plus court ; celui-ci étant dans le genre cité le double des deux articles apicaux reunis.

48. Seychellesia nitidula, sp. nov. (Pl. 14, fig. 18).

Brunnea, nitidula. Caput flavo-ornatum, ab antico compressum, inter oculos et

rostrum valde excavatum, ocellis posticis inter se dimidio magis appropinquatis quam ab

ocello antico distantibus. Rostrum angustum, marginibus anguste flavis. Frons antice linea

flava, antrorsum ampliata. Palpi fusci, articulo ultimo articulo penultimo sesqui longiore,

—

BOLIVAR—ORTHOPTERA: ACRYDITDA#, PHASGONURIDA, GRYLLIDA 287

apicem versus ampliato et margine antico sinuato. Antenne fuse? articulo primo

transverse flavo-fasciato. Oculi exserti, brunnei. Pronotum transversum, antice posticeque

truncatum, anguste marginatum, disco medio inzequali, impresso, flavo-picto, dimidio

antico castaneo, dimidio postico nigro, lineis 4 flavis antice abbreviatis; lobis deflexis

margine antice incrassato flavo, angulo antico subacuto, margine infero antice anguste rutfo,

postice subreflexo. Elytra subcornea flavo-varia, venis crassis elevatis longitudinalibus,

in campo dorsali venis magis distantibus et vena media subflexuosa postice curvata ;

campo marginali venis axillaribus duabus valde curvatis atque inter se distantibus, apicem

versus approximatis. Alze nullee. Pedes flavo- et fusco-annulati. Tibize anticee in latere

interno tympano ovali subrotundato parvo instructae: metatarsus elongatus, dimidiam

longitudinem tibiarum distincte superans. Pedes postici breves. Femora basi valde

incrassata. Cerci corpore longiores, longe griseo-pilosi. Ovipositor cercis brevior, apice

acuto non denticulato. 2.

Long. corp. $ 11; pron. 2; elytr. 4,5; cerc. 12; ovip. 7,5 mill.

Loc. “Seychelles. Silhouette: from near Mare aux Cochons, over 1000 ft. LX

1908.”

49, Seychellesia patellifera, sp. nov. (Pl. 14, figs. 19, 20).

Pallide grisea, fusco-marmorata. Caput pallide variegatum, rostro a supero viso

articulo primo antennarum angustiore. Pronotum antice obtusissime sinuatum, postice

truncatum, subgibbulosum, fuscum, linea media nec non maculis discalibus, margini-

busque, precipue margine postica, griseo-flavescentibus; lobis deflexis fuscis, angulo antico

inferiore maculisque una vel duabus mediis griseis. Elytra brevissima, squamulas simulantia,

pronoto fere dimidio breviora, extus fusca, rotundata, indistincte venosa. Pedes fusco-

annulati. Femora postica superne fusco-fasciata atque oblique fusco-strigata. 'Tibize anticze

tympano nullo. Cerci longissimi. ¢.

Long. corp. $ 12; pron. 2,2; elytr. 1; fem. post. 12; cere. 19 mill.

Toc. “Seychelles. Silhouette, forest near Mt. Pot-i-eau, 1500 ft., VIII. 1908.

Mahé: Morne Seychellois, 1905 ; Cascade Estate, 800 ft. or over, 1908—9.”

50. Seychellesia longicercata, sp. nov.

Fusco-brunnea. Caput brunneum superne rufo-varium, rostro, vitta postoculari nec

non lineis duabus occipitalibus pallide rufis; scrobis antennalibus parvis, rostro a supero

viso articulo primo antennarum haud vel vix latiore. Palpi fusci. Antenne longissime,

pallide rufze, parum distincte brunneo-annulatie. Pronotum transversum antice posticeque

truncatum, medio linea impressa, marginibus disci vitta pallida medio ampliata; lobis

deflexis concaviusculis, angulo antico inferiore rufo. Elytra pronoto vix longiora, cornea,

intus basi tangentia, dehiscentia, venis longitudinalibus subparallelis elevatis, venis

transversis raris parum expressis, lateribus vitta pallide flava; campo marginali venis

axillaribus duabus antice curvatis. Alse nulla. Pedes rufescentes. Tibize fusco-annulate,

anticee tympano in latere interno instruct; posticee superne anguste fusco-strigate.

Cerci longi et longe pilosi. Ovipositor rectus, tibiis posticis brevior.

SECOND SERIES—ZOOLOGY, VOL, XV. 37

288 PERCY SLADEN TRUST EXPEDITION

Long. corp. f 12; pron. 2,2; elytr. 2,8; fem. post. 11 mill.

Long. corp. $ 18; pron. 3,1; elytr. 3; fem. post. 14; ovip. 12 mill.

Loc. ‘Seychelles. Silhouette: from near Mt. Pot-a-eau, VIII. 1908. Mahé:

Cascade Estate, over 800 ft.; Mare aux Cochons district, about 1500 ft. or over.”

Gen. PHALANGACRIS, Bolivar.

51. Phalangacris alluaudi Bolivar, Ann. Soc. Ent. France, vol. lxiv. p. 381 (1895).

Loc. Seychelles: Mahé, 1908—9; Cascade Estate.

En décrivant ce genre j'ai signalé la présence d’un petit miroir & la base des jambes

antérieures du c6té intérieur; mais dans les exemplaires que je viens d’examiner je ne

distingue pas ce miroir; ne se trouverait-il que dans les exemplaires adultes? Tous ceux

que j'ai vus de l’expédition de Professeur Gardiner sont jeunes. En examinant l’exemplaire

que je posséde et qui provient des chasses de M. Alluaud je constate la présence du

miroir sur l'une des jambes, mais il manque sur l’autre ; ce n’est pas un organe constant.

Gen. Cicantuus, Serville.

52. Cicanthus parvulus Saussure, Abhandl. Senckenb. Ges. xxi. p. 613 (1899).

Loc. “Farquhar Atoll, 1905 (Gardiner). Also known from Aldabra and Nossi Bé.”

Espéce trés prochaine de Cf. indicus Sauss. par la briéveté de l’oviscapte et par la

taille.

Gen. TriconipiuM, Rambur.

53. Trigonidium perpusillum, sp. nov.

Pallide flavescens, griseo-villosum. Caput postice superne maculis fuscis plerumque

pictum, antice inter oculos fascia lata transversa nigro-nitida, pilis brunneis instructum.

Palpi pallidi; articulo ultimo elongato, apicem versus sensim ampliato, infundibuliformi.

Antennz concolores pone medium brunnez, articulis primis basalibus nigris. Pronotum

dorso subtransversum, pilis sparsis; lobis deflexis ad dorsum fascia nigra percurrente.

Elytra cornea, simul sumpta plus minusve ovata, campo dorsali fortiter 5-venoso, venis

transversis indistinctis, apicem abdominis attingentia et apice extus sinuata. Ale nulle.

Pedes concolores. Femora postica plerumque striga brunnea. Tibize posticze spinis basi

puncto fusco. Tarsi omnes articulo primo apice nec non articulo secundo fuscis. Abdomen

pallidum. Ovipositor apicem versus subrufescens. Cerci apicem ovipositoris sub-

attingentes, pallidi, longe griseo-pilosi.

Long. corp. $? 4,5; pron. 1; elytr. 2,8; fem. post. 4,8; ovip. 1,8 mill.

Variat pronoto unicolore pallido, vitta nigra loborum lateralium nulla.

Loc. ‘Seychelles, 1908—9. From the mountain-forests. Mahé: high forest near

Morne Blanc ; forest above Cascade Estate, about 800 ft. and over; slopes of Morne

Seychellois, about 1500ft.; near Mt. Harrison, over 1500 ft. Silhouette: near Mt.

Pot-a-eau, about 1500 ft. ; Mare aux Cochons.”

Liespéce la plus prochaine de celle-ci est sans doute 7. erythrocephalum Walk.

(Scleropterus erythrocephalus Walk.) de Natal et de l'Afrique occidentale, mais elle se

BOLIVAR—ORTHOPTERA : ACRYDIIDA, PHASGONURIDA, GRYLLIDA 289

distingue aisément par la coloration; celle-ci varie dans l’espéce décrite et permet de

distinguer trois variétés principales :

Var. infuscatum. Pronoto maxima parte; femoribus posticis, basi annuloque ante-

apicali pallidis exceptis ; nec non fascia lata transversa segmentorum abdominis, fuscis.—

Mahé.

Var. ruficeps. Capite, macula nigra interantennali articulisque basalibus antennarum

nigris exceptis, rufo-sanguineo ; pronoto abdomineque fusco-nigris ; femoribus posticis parte

media late fuscis ; tibiis posticis fuscis.—Silhouette.

Var. impicticolle. Pronoto corpore concolore, nec nigro-vittato nec infuscato.—

Silhouette.

54. Trigonidium vittaticolle, sp. nov.

Pallide rufescens, griseo-villosum. Caput superne rufo-4-lineatum. Antenne

longissimze, pallide testaceze, remote et subindistincte fusco-annulatee. Palpi pallidi ;

articulo ultimo apicem versus sensim et valde ampliato, infundibuliformi. Pronotum in

subeylindricum, in ? subtransversum, marginibus fulvo-fimbriatis, lateribus pilis sparsis,

dorso vittis rufis longitudinalibus plus minusve confusis, lobis deflexis ad dorsum vitta

rufa. Elytra cornea, simul sumpta ovata, apicem abdominis subsuperantia, apice inter

campum marginalem et dorsalem valde sinuata; dorso 4—5-venoso, inter venas fusciore ;

venis transversis pallidis, distinctis. Alze explicate elytra parum superantes. Pedes

pallidi, unicolores, tantum articulo primo apice nec non articulo secundo fuscis, in tarsis

posticis articulo tertio fusco. Ovipositor apicem versus obscure rufus. Cerci longi et longe

pilosi.

Long. corp. $? 7; pron. 1,1; elytr. 4,5; fem. post. 6,5; ovip. 2,5 mill.

Loc. “Seychelles, 1908—9. Mahé, from the mountain-forests: high forest behind

Trois Fréres; Mare aux Cochons district ; Cascade Estate, &ce. Silhouette: Mare aux

Cochons.”

Espéce voisine de l’antérieure mais plus grande et de coloration différente.

Gen. ZARrceEus, Bolivar.

55. Zarceus fallaciosus Bolivar, Ann. Soc. Ent. France, vol. Ixiv. p. 384 (1895).

Cette espéce varie beaucoup par la taille et la coloration. Les exemplaires typiques

sont verditres pendant la vie d’aprés les indications de Mr Hugh Scott; ils ont des ailes

longues, roussitres le long du bord supérieur (antérieur), offrant de chaque cdté, considérées

au repos, une ligne noire interrompue. Mais on trouve les variations suivantes :

A. Coloration pile, uniforme, les ailes longues mais dépourvues de bande noire

interrompue.—Mahé, Silhouette.

B. Taille de beaucoup moindre, couleur uniforme, verdatre pendant la vie et couleur

de paille lorsqu’ils sont secs.—Mahé, Silhouette.

C. Taille plus grande, les ailes raccourcies arrivent 4 peine aux genoux postérieurs.

Palpes noiratres; le premier article des antennes peut étre aussi maculé de brun ainsi

que le dos du pronotum.—Mahé, Silhouette.

37—2

290 PERCY SLADEN TRUST EXPEDITION

Loc. ‘Seychelles. Found among the foliage of trees and bushes at the coast, and at

elevations extending up into the forests over 1000 ft.: the colour is a bright light green

during life. Silhouette: coast and cultivated country, IX. 1908; Mare aux Cochons,

about 1000 ft., on or near the plateau VIII—IX. 1908; near Mt. Pot-d-eau, over 1000 ft.5

VIII. 1908. Mahé: Long Island, VII. 1908; Anonyme Island, I. 1909; country near

Morne Blanc between 500 and 1000 ft. 1908 ; Cascade Estate.”

56. Zarceus major, sp. nov. (Pl. 14, fig. 21).

Major, pallide flavescens; superne rufescens. Caput confuse rufo-fasciatum. Palpi

apice valde ampliati. Antenne remote sed distincte fusco-annulate. Pronotum disco

rugoso-subealloso, rufo-vario; callis duobus mediis fuscis. Elytra abdomen ex toto

tegentia, superne rufescentia, venis longitudinalibus dorsalibus nec non venis transversis

eeque altis, exsertis, rufis. Tibize posticze spinis apice nigris. Tarsi pallidi, articulis

tantum apice angustissime fuscis. 9.

Long. corp. ¢ 7,5; pron. 1,2; elytr. 5,8; fem. post. 5,5; ovip. 2,5 mill.

Loc. “Seychelles. Mahé and Praslin, 1905 (Gardiner). Mahé, 1908—9, only

found in the highest and dampest forests, among the foliage of trees: summit of Morne

Pilot, over 2000 ft.; between Trois Fréres and Morne Seychellois; stunted forest of

‘Capucin’ (Northea) on summit of mountain above Anse Major, over 2000 ft. The

lateral parts, legs, &c., which become yellow after death, are green during life.”

Espéce qui différe du Z. fallaciosus Bol. par sa taille plus grande et par les nervures

du champ dorsal des élytres plus fortement saillantes, de couleur rousse; les veines

transverses sont saillantes dans cette espéce, tandis que dans le fallaciosus elles sont

trés peu distinctes et beaucoup moins élevées que les veines longitudinales.

Gen. HrrERoTRYPUS, Saussure.

57. Heterotrypus insularis, sp. nov. (Pl. 14, fig. 22).

Testaceus ; sicce fusco-testaceus, griseo-villosus. Antenne longissimee pone medium

fusco-annulate. Frons nitida, setis nigris magnis destituta. Rostrum antice impressum,

articulo primo antennarum latius. Pronotum antrorsum valde angustatum, antice postice-

que truncatum, setis brevibus marginatum, medio linea longitudinali impressa. Elytra

femorum posticorum apicem haud attingentia, ampla, pone medium latiora, venis obliquis 7,

tribus primis parvis, quattuor ultimis longis, sinuosis, parallelis; speculo transverso, antice

rectangulo, venis duabus transversis, prima subrecta, secunda sinuata, diviso; campo

apicali reticulato, campo laterali plurivenoso, venis perpendicularibus subparallelis, fere

rectis. Alz elytris breviores. Pedes fusco-annulati. Tibize anticze graciles basin versus

leviter crassiores, tympano intus extusque ovato aperto gerentes ; posticee graciles, spinis

intus 4, extus quoque 4; marginibus basi serratis, sed inter spinas margine externo

tantum serrato: calcare supero interno calcare intermedio valde longiore, apicem meta-

tarsi tamen haud superante. Metatarsus supra in margine externo tantum 4-spinosus. @.

Long. corp. $15; pron. 2,5; elytr. 11,5; fem. post. 11,5; antennarum 85 mill.

BOLIVAR—ORTHOPTERA: ACRYDIIDA, PHASGONURIDA, GRYLLIDA 291

Loc. “Seychelles, 1908—9. Beaten from bushes &c. in mountain-forests ; seen but

seldom, and very difficult to capture owing to the extreme swiftness with which it runs.

Silhouette: Mare aux Cochons. Mahé: near Morne Blanc, and Cascade Estate.”

L’un des exemplaires de Silhouette est d’une couleur roussitre, avec le bord postérieur

du pronotum plus obscur. L’armature des jambes postérieures ressemble celle du H. afri-

canus Sauss., mais par le reste cette espéce est plus prochaine du H. funambulus de la

Nouvelle Guinée.

Les éperons externes des jambes postérieures sont assez petits, l’imtermédiaire qui est

le plus grand n’est pas aussi grand que l’inférieur interne; le supérieur interne est deux

fois et demi aussi long que l’intermédiaire interne et ne dépasse pas le métatarse postérieur.

Cet insecte a une grande ressemblance avec Homaogryllus japonicus Haan. Outre

le H. africanus Sauss. on connait deux autres espéces du genre Heterotrypus, le laqueatus

et le maculosus Karsch, mais aucune d’elles peut se confondre avec la nouvelle espéce.

Gen. Fryeria, gen. nov. (Pl. 14, fig. 28).

Corpus subcylindricum, antrorsum subattenuatum, breviter pubescens. Caput breve,

convexum, inter antennas rostratum, inter oculos impressum. Ocelli in trigonum

gequilaterale dispositi: rostrum marginibus acutiusculis parallelis vel anterius subdiver-

gentibus. Oculi magni sed parum exserti. Antennz valid, corpore longiores. Palpi

maxillares longi; articulo ultimo subsecuriformi apicem versus valde latiore. Pronotum

subcylindricum, elongatum, antrorsum leviter angustius, superne indistincte deplanatum,

antice subsinuatum, postice medio subarcuatum et utrinque sinuatum ; lobi deflexi duplo

longiores quam altiores, angulis inferioribus rotundatis, parallelis. Elytra apicem femorum

posticorum superantia, in ¢ tympano perfecte explicato, venis obliquis anterioribus et

posterioribus divergentibus; vena mediastina ramosa. Ale elytra parum superantes,

cercorum apicem haud attingentes. Pedes validi, compressi. Tibize anticze extus speculo

ovali, in latere interno minuto. Tibiz anticze intermedizeque superne sulcatze ; inter-

mediz distincte tumide. Femora postica valde compressa, a latere visa ovaliformia, parte

apicali filiformi nulla. ‘Tibize posticee valid, inter spinas magnas spinis minoribus duabus

vel tribus instructz. Calcaria externa minuta, interna longiora, calcar superum maximum,

inferum minimum. Metatarsus brevis, extus bidentatus, intus spina apicali tantum armatus:

articulus secundus cordiformis, depressus. Cerci longe pilosi. Lamina subgenitalis ? com-

pressa, apice sinuata. Ovipositor rectus, longissimus, linearis, valvis apice haud dentatis.

Genre intermédiaire entre Madaswmma Walk. (Calyptotrypus Sauss.) et Parecanthus

Sauss. mais ressemblant tout & fait & ce dernier genre par la forme cylindrique du corps et

par le pronotum allongé,

Je me fais un plaisir de dédier ce genre si intéressant au savant Mr J. C. F. Fryer,

explorateur de lile d’Aldabra.

58. Fryeria aphonoides, sp. nov. (Pl. 14, fig. 23).

Testaceo-ferruginea, griseo-villosa. Oculi brunnei. Labrum fuscum. Antenne

concolores. Elytra ¢ venis obliquis duabus, anterioribus parvis, ultimis ab anteriori-

bus divergentibus, longis, sinuatis et parallelis, speculo antice angulato, medio

vena transversa diviso; campo apicali magno, venis plurimis regularibus, apicem

292 PERCY SLADEN TRUST EXPEDITION

versus directis, in parte proximali a venis transversis connexis, in parte distali venis

transversis nullis; campo laterali pluri-venoso, antice venis 7 subparallelis, ramis radia-

libus 8 sinuatis.

Long. corp. ¢ 34; pron. 4,5; elytr. 24; fem. post. 15 mill.

Long. corp. ? 34; pron. 5; elytr. 27; fem. post. 17; ovip. 17 mill.

Loc. Aldabra, 1908—9 (Fryer).

Gen. Euscyrtus, Guérin.

59. Huscyrtus bivittatus Guérin, Icon. R. Anim., Ins. p. 334 (1844).

Loc. “Seychelles. Often swept from grass, &c. from the coast up to over 1000 ft.

Silhouette: from near Mont Pot-d-eau, and Mare aux Cochons 1000 ft., VITI—IX. 1908.

Mahé: near the coast (Anonyme Island, &c.); Cascade Estate, &c.”

J’avais déja indiqué cette espéce comme se trouvant aux Seychelles: j'ai méme

signalé deux variétés, l'une (abbreviatus) & ailes raccourcies ne dépassant pas les

élytres, que je retrouve aussi parmi les exemplaires de Mahé; et l’autre, a ailes longues,

que j'ai nommée fuscinervis, dont le dos des élytres est orné de chaque c6té de lignes

transverses brundatres.

Parmi les exemplaires de Mahé, outre la variété abbreviatus, il y a des exemplaires 4

ailes bien développées, et dont tout le dos, 4 partir de la téte, est d’un brun obscur. Je

considére ces exemplaires plus prochains du type de lespéce tel qu'il a été décrit par

Guérin, et de Saussure ; ce dernier a indiqué le Natal comme habitat de cette espéce.

EXPLICATION DES PLANCHES 13 ET 14.

PLANCHE 13.

Fig. 1. Ocytettiz pupulus, sp. nov., 3.

Fig. 2. Procytettia fusiformis, gen. et sp. nov., ¢.

Fig. 3. Paratettiw chagosensis, sp. nov., ?, face externe du fémur intermédiaire.

Fig. 4. Coptottigia cristata, gen. et sp. nov., 2, téte et pronotum, de devant.

Fig. 5. Peades cruciformis Bolivar, ¥, extrémité de l’abdomen.

Fig. 6. Rhynchotettix gardinert, gen. et sp. nov., ?.

lee tf a - _ i » tarsus postérieur.

Fig. 8. Plangia ovalifolia, sp. nov., fg, lamina supra-analis et cerci.

Conocephaloides chagosensis, sp. nov., g’, téte, de dessus,

Fig. 10. Scottva chagosensis, gen. et sp. nov., 2.

Fig. 11. Scottia salticiformis, gen. et sp. nov., 2.

Fig. 12. Ornebius elegantulus, sp. nov., ¥

Fig. 13. Pentacentrus ngrifrons, sp. nov., g’, téte.

Fig. 14. a Fe yo ct Ghyunom

Fig. 15 ee * » » o> extrémité de l’abdomen.

PLANCHE 14,

Fig. 16. Gryllapterus tomentosus, gen. et sp. nov., 2, téte, du cdté.

Fig. 17. Pheogryllus fuscus, gen. et sp. nov. , patte postérieure, face externe.

Fig. 18. Seychellesia nitidula, gen. et sp. nov.,

Fig. 19. A patellifera, gen. et sp. nov., 2, palpe maxillaire.

Fig. 20. 5 » » » @, tibia et tarsus de la patte postérieure droite.

Fig. 21. Zarceus major, sp. nov. &.

Fig. 22. Heterotrypus insularis, sp. nov., §, extrémité de tibia, et tarsus, de la patte postérieure

droite.

Fig. 23. Fryeria aphonoides, gen. et sp. nov., gi.

Trans. LINN. Soc, SER. 2.Z00L VOL. XV, PL.13

PERCY SLADEN TRUST EXPEDITION

(BOLIVAR)

ambridge

ORTHOPTERA

ZOOL.VOL. XV. PL.14

a.4

,SER

TRANS. Linn. Soc

LADEN TRUST EXPEDITION

(BOLIVAR)

PERCY <

ORTHOPTERA

No. XVIJI.—ORTHOPTERA, PHASMIDA OF THE SEYCHELLES.

By *Dr Ienacio BotivarR AND CHARLES FERRIERE, B.Sc., University of Geneva.

(With 2 Text-figures. )

(CommunicaTeD BY Pror. J. STANLEY GarpiNer, M.A., F.R.S., F.L.S.)

Read 21st March 1912.

Tue Phasmide brought from the Seychelles by the Percy Sladen Trust Expedition

are remarkable firstly by the character of their local distribution within those islands.

Out of the 6 species found there, 5 are peculiar to the Seychelles, and only 1 single

species (Phyllium bioculatum Gray) is widely distributed. Now Mr Scott informs me

that all the specimens of the 5 peculiar species (i.e. the Carausius and Greffea) collected

by him, and among which are 3 new species, were found in the mountain-forests, most of

them in the highest parts, among the endemic forest vegetation: on the other hand no

Phyllium was found by him in the forests, but all those in the collection were given by

residents or local collectors, who stated that these insects are found in the foliage of

guava-bushes (Psidiwm), and perhaps of some other non-endemic plants in the lower

cultivated country.

If we consider now the wider geographical distribution we see that all the species of

Phyllium recorded from the Seychelles are found, outside that country and Mauritius,

only in India, Ceylon, and the East Indies; and that, likewise, the genus Carausius has

its centre of distribution in the Malay Archipelago, and extends also into India, Ceylon,

the South of China, and Australia; while the genus Greffea has been hitherto recorded

only from Australia, Celebes, New Guinea, Fiji, Society Islands and other localities in

those regionsf.

* The two authors’ portions of the work are distinguished by their names being placed in brackets at the

end of each of their several sections. The double authorship is explained as follows. A small but interesting

series of Phasmide was collected by the ‘“Sealark” Expedition in 1905. This material was worked out by

Dr Bolivar, and sent back by him to Cambridge: he found among it a new species (Carausius gurdinert), the

description of which is included in this paper, and also two others (first obtained by Alluaud in 1892) which he

had previously described in Ann. Soc. Ent. France, xiv. 1895, pp. 369—385. A much larger material was

collected in 1908—9, and this was studied by M. Ferriére at the Cambridge University Museum in the autumn

of 1911. He not only had before him the material determined by Dr Bolivar and the latter’s manuscript, but he

also visited the Hope Department of the Oxford Museum in order to consult the fine collection of Phasmidie

preserved there. In the Seychelles collection of 1908—9, he referred a large number of specimens to the species

already determined by Dr Bolivar, but he also described the two new species Carausius scotti and Greffea

seychellensis, M. Ferritre has incorporated his own and Dr Bolivar’s manuscripts into the present paper and

written the introduction thereto. I have myself added certain particulars as to localities, habits, &c., and have

also, with Dr Bolivar’s permission, translated those parts of his manuscript which were written in French.—

Hueu Scorr.

+ The Indo-Australian affinities of the Seychelles Phasmide are commented on by Professor Kolbe in the

introduction to his paper on “Die Coleopterenfauna der Seychellen,” Mitt. Zool. Mus. Berlin, v, 1910, pp. 7 & 8.

294 PERCY SLADEN TRUST EXPEDITION

The 4 Seychelles species of Carausius form within the limits of that genus a very

definite group, being all of them distinguished by certain characters which separate them

from the other members of the genus. They are the only representatives of the large

tribe of the Lonchodini found outside the geographical area formed by the Oriental and

part of the Australasian Regions.

On the other hand, of the Phasmide of East Africa and Madagascar, not a single

representative was found in the Seychelles.

As for the genus Greffea, the discovery of a representative of it in the Seychelles,

so far removed from the centre of distribution of the genus, is a remarkable fact. (C.

Ferriere.)

Tribe Phyllini.

Puywirum Illiger, Kif. Preuss. p. 499, 1798.

1. Phyllium bioculatum Gray, in Griffith's Animal Kingdom, vol. xv. (Ins. ii.),

p- 191, pl. 63, fig. 3, 1832; Bolivar, Ann. Soc. Ent. France, vol. lxiv. p. 374, 1895; Brunner

and Redtenbacher, Die Insektenfam. der Phasm., p. 174, 1906.

Loc. Seychelles. Silhouette, 1908: 1 adult and 1 immature ¢, 1 adult and several

immature ?. Mahé: 4 adult ?, and a number of immature ? in various stages of develop-

nent, and eggs; one of the adult ? was marked (when alive) with patches of reddish

colour on the femora, tibize, the large nervures of the tegmina, and the abdomen; the

other adult $ were almost uniform green. None of the specimens were found in the high

mountain-forests. Also known from Mauritius, India, Ceylon, Java, Sumatra, Borneo.

Note. Three other species of Phylliwm have been recorded from the Seychelles :

P. gelonus Gray, also known from Ceylon and the East Indies: P. celebicum de Haan,

also recorded from Burmah, Philippine Is., Celebes, &c.: and P. siccifolium Linnaeus,

also recorded from Mauritius, India, Indo-China, Philippine Is., Moluccas, &c.: see

Brunner and Redtenbacher, op. cit. pp. 174, 175 and 176. None of these were obtained

by the Percy Sladen Trust Expedition. (C. Ferriére.)

Tribe Lonchodini.

Carausius Stal, Rec. Orth. ii. p. 8, 1875.

2. Carausius alluaudi (Bolivar).

Lonchodes alluaudi Bolivar, Ann. Soc. Ent. France, vol. lxiv. p. 372, 1895.

Carausius alluwudi Brunner and Redtenbacher, Die Insektenfam. der Phasm., p. 274,

pl. 12, fig. 6b (3), 1907.

The fact that the length of the intermediate femora compared with that of the

metanotum brings this species near to the genus Lonchodes, made me originally decide to

place this species in that genus rather than in Carausius. This character distinguishes

all the Seychelles species from the rest of the species of Carausius. Redtenbacher was

wrong in ascribing to this species the character “femora omnia apice subtus mutica.” It

can be seen that I said in my original description “femora omnia inermia, tantum subtus

ante aream apicalem bidentata.” (1. Bolivar.)

BOLIVAR AND FERRIERE—ORTHOPTERA, PHASMIDA OF THE SEYCHELLES 295

Loc. Seychelles. La Digue (Alluaud). Silhouette; high damp forest, about 2000

feet, VIII. 1908, 1 3. Mahé; 1905, 3 ¢, 1 ? (Gardiner); forest near Morne Blanc, X—XI.

1908, 2 3,4 9; forest above Cascade Estate, several ¢ and 2 9. In the high jungle above

Cascade, 23. I. 1909, 6 ¢ were found clasping (with the lobes of the anal segment) a

single ? at various points on the underside of the abdomen; a 7th g¢ was close by.

When alive the adult ¢ were conspicuously reddish, while the adult ? are greyish-brown

(Scott).

3. Carausius sechellensis (Bolivar).

Lonchodes sechellensis Bolivar, Ann. Soc. Ent. France, vol. lxiv. p. 373, 1895.

Carausius sechellensis Brunner and Redtenbacher, Die Insektenfam. der Phasm.,

p. 274, pl. xii. fig. 6a (¢), 1907.

This species was originally described by Dr Bolivar from specimens obtained in Mahé

by M. Alluaud in 1892. A single # and 2 ?, obtained in Mahé and Praslin in 1905 by

Professor Stanley Gardiner, were considered by Dr Bolivar to be a new species, which he

ealled in his MS. C. bicornutus. His description of this proposed new species is as

follows :—

“ Carausius bicornutus, sp. nov.

Lonchodes sechellensis Bolivar, Ann. Soc. Ent. France, vol. xiv. (1895), p. 373, ?

(haud %).

Carausius sechellensis Brunner et Redtenbacher, Die Insektenfam. der Phasm.

W907, p. 274, ¢ (Tab. 12, fig. 6a, 9).

Caput inter oculos bispinosum ? et ? nec non occipite biseriato-tuberculato-spinoso.

Pronotum antice bispinulosum, in $ granulosum in ? spinulosum. Mesonotum atque

metanotum in ¢ minus triquetra quam in ?, granulosa, carinis lateralibus denticulatis,

in 2 spinosis. Femora intermedia et postica subtus apice utrinque unidentata, carina

media inermi; intermedia metanoto cum segmento mediano longiora. Tibize normales,

carina media inferne prope basin obtuse et breviter angulata. Segmentum anale ¢

tectiforme, triangulariter et breviter emarginatum; lobis parvis, intus dentibus nigris

seriatis instructis. Lamina subgenitalis transverse subcarinata, carina medio subgibbosa.

Seomentum anale ? semicirculariter sinuatum. Lamina supraanalis parva, trigona, apposita.

Abdomen subtus linea media plus minusve granosa.

PAE CORP cccisisxaceevevcnsseiens $68 cote ? 87

PRMD CS aiccciiesicteiccsswiceccince UG! | Mustitaas 22

» Mmetan.c.segm.m. ... 12 .... 13

Rep BORE: Ws se snneasnessses 2 Die sates 2,8

PTOMHOE TAT Ge ccs eciee cece pa pepe oe 22

5 Be ATLEORIN 5, «seas 15: 45 deat 16

% Ret OR Ge ceo, stn assis Sy ypeccute Li Fig

It will be seen from the above that Dr Bolivar thought that the ? previously

described as C. sechellensis should be referred to the proposed new species (C. bicornutus),

while the $ previously described as C. sechellensis should remain under that name: so

SECOND SERTES—ZOOLOGY, VOL. XV. 38

296 PERCY SLADEN TRUST EXPEDITION

that C. sechellensis would remain as a species of which only the ¢ is known. I have had

for examination a much larger material, consisting of a number of $ and ? obtained in

1908—9, in addition to those obtained in 1905. An examination of this series has

convinced me that it is impossible to separate C. sechellensis from C. bicornutus ¢.

According to Bolivar’s description given above, C. bicornutus differs from C. sechellensis

only in having two spines on the head between the eyes, shorter lobes on the anal segment,

the subanal lamina transversely carinate, and in having no tooth at the base of the tibiz.

But in the series of ¢ before me, the spines between the eyes vary much in length and in

some cases are very little developed ; the length of the lobes and the form of the subanal

lamina also vary from one individual to another. These small characters vary inde-

pendently of one another. As to the little tooth said to be present at the base of the

tibia in C. sechellensis, | have been unable to see it in any specimen. I consider that the

differences are only of the nature of individual variation, and quite insufficient to

separate the series into two species; I therefore retain all the specimens under the name

C. sechellensis Bolivar. (C. Ferriére.)

Loc. Seychelles. Silhouette: high damp forest near Mont Pot-i-eau, about

2000 ft., VIII. 1908, 1 ¢; near Mare aux Cochons, IX. 1908, 4 f and 3 ¢ (including a ¢

and a @ taken im coitu at night on a wild pineapple-plant). Mahé: 1 g, 1 9, and 1

immature $, 1905 (Gardiner); near Morne Blanc, Cascade Estate, and other localities,

1908—9, 2 adult ¢ and 6 immature f. Praslin: XI—XII. 1908, 1 very large 3, and 1 9;

1905, 1 2 (Gardiner). Félicité: 14—18. XII. 1908, 2 3, 2 9.

4. Carausius gardineri, sp. nov.

Caput muticum, subelongatum, retrorsum subangustatum, antice vix pone antennas

transverse impressum ; postice binodosum. Pronotum lve, sulcatum. Mesonotum et

metanotum tectiformia, in $ gracilia, marginibus parallelis, in ? antice subangustata, in

? tantum granulosa, marginibus haud dentatis sed granulis callosis, parvis, preecipue in

metanoto distinctis. Femora omnia inermia, subtus prope apicem nec lobata nec den-

tata; femora intermedia metanoto cum segmento mediano distincte ¢ vel vix 9 longiora.

Abdomen granulosum. Segmentum anale 3 compresso-tectiforme, postice profunde fissum,

lobis elongatis, intus denticulis nigris munitis. Segmentum anale ? late triangulariter

emarginatum, lobis obtusis. Lamina supraanalis parva, subtrigono-rotundata. Seg-

mentum abdominale ventrale septimum ? apice medio callosum et angulariter productum,

fuscum.

Long. Corps, .acs.ecsmeenienetee 20 OE ae 2 64

n> MCSONS eee eee 13). CL Ae Ree 17

» Mmetan. c. segm. m. een aBe 11,5

Py isieteaamh ants Soooaadcdecdusd 1 ay aes 2

» 9 fem ante eeceeeeeeeeeee WAU. <Slsees 16

A »5) “INCOTM yee eeeeeeneee LM ae ee 11,5

. 93° | POSES ear ennatinslensls Su Adstaelers 14

This new species of Carausius from the Seychelles must be placed near the other

species which are found in the same islands, on account of the form of the upper side of

BOLIVAR AND FERRIERE—ORTHOPTERA, PHASMIDA OF THE SEYCHELLES 297

the body, which is elevated in the manner of a roof (though this character is less strongly

marked than in the other species); and on account of the intermediate femora in the ¢

being markedly longer than the metanotum and median segment together, while in the ¢

they are almost of the same length. This is the only Seychelles species in which the

femora are quite unarmed. (J. Bolwar.)

Loc. Seychelles. Mahé: Morne Seychellois, 1905, 2 3, 2 ? (Gardiner) ;, 1905, exact

locality unrecorded, 2 $; high forest near Morne Blane, X—XI. 1908, 7 $, 3 3, and 2 im-

mature ?; Cascade Estate, 1908—9, 1 ¢; 1908—9, exact locality unrecorded, 1 3, 3 $.

Silhouette: from high forest near Mont Pot-d-eau, some from 2000 feet or more, VIII.

1908, 6 4, 2 9, and 1 immature ?. This is a typically mountain-forest species: the @,

which are usually very dark in colour, were frequently swept from beds of fern in the high

damp forests: the adult ¢ were brown when alive (Scott).

5. Carausius scotti, sp. nov. (Fig. 1.)

g. Caput inter oculos bispinosum, postice bituberculatum. Antenne nigree, pedi-

bus anterioribus longiores. Pronotum utrinque 3-spinosum. Mesonotum tectiforme,

tuberculis aliquibus sparsis instructum, atque postice 4-spinosum. Metanotum leve,

postice bispinosum. Segmentum medianum et segmenta abdominis 2—8 postice bi-

spinosa; segmenta 9 et 10 haud spinosa. Segmentum anale compresso-tectiforme, lobis

parvis. Lamina subgenitalis in modo ejus C. al/uaudi constructa. Femora omnia inermia,

intermedia et postica ante aream apicalem subtus bidentata: intermedia metanoto cum

segmento mediano longiora.

Long. corp. 78 mm. pron. 3. meson. 21. metan. cum segm. med. 143. segm.

med. 24. abdom. 38. fem. ant. 24. fem. int. 17. fem. post. 20.

Yellowish-brown; black at the articulations. Head short, dark brown, with two

spines between the eyes and two smaller spines on the occiput. Antenne black, longer

than the front legs. Pronotum dark, with six little spines, regularly placed in two series,

the two front ones longer. Mesonotum roof-like, parallel-sided, with only a few tubercles

and four spines near the posterior end, of which the two anterior are nearer the middle line

and longer. Mesosternum keeled and smooth. Metanotum smooth, with two spines closely

approximated near the posterior end. Median segment and the following abdominal

segments except the two last, each with two spines at the hind end, the spines becoming

gradually smaller towards the extremity of the abdomen. Abdomen narrow, suddenly

enlarged between the 8th and 9th segments. Anal segment roof-like, compressed ; lobes

short, provided inside with little black teeth. Cerci short. Subanal lamina gibbous

with the posterior edge truncate and sinuate. Front femora unarmed, longer than the

mesonotum. Intermediate and posterior femora provided at the apex with two little

teeth. Intermediate femora longer than the metanotum and the median segment together.

Tibize ‘all unarmed.

This single specimen has a peculiar and remarkable aspect owing to the presence of

the black spines regularly placed in pairs at the posterior end of each segment (except

the two last), and to the yellowish-brown colour passing to black at the articulations

of the body and legs. It comes near the other Seychelles species of Carausvus in the

38—2

298 PERCY SLADEN TRUST EXPEDITION

roof-like form of the body,—less visible on the abdomen—its long black antennz, the form

of the anal segment and the subanal lamina, and the two little teeth at the apex of the

intermediate and posterior femora, which teeth are found also in C. allwaudi and

C. sechellensis.

This species is dedicated to Mr Hugh Scott. (C. Ferriére.)

Toc. Seychelles. Silhouette: high damp forest near Mont Pot-d-eau, VU.

1908, 1 4.

\ N

Fig. 1. Carausius scotti, ; x 14. Fig. 2. Greffea seychellensis, 2 ; natural size.

Nore. The collection contains a number of immature specimens of Carausius, the

species of which cannot be determined. Many of these were green when caught, and

were swept from beds of fern in the high damp forests, often together with the little dark

males of C. gardineri.

BOLIVAR AND FERRIERE—ORTHOPTERA, PHASMIDA OF THE SEYCHELLES 299

Tribe Phibalosomini. Section Platycranie.

Grarred Brunner, in Dr Graeffe, Reisen im Innern der Insel Viti Levu, p. 46, 1868 ;

Brunner and Redtenbacher, Die Insektenfam. der Phasm., p. 370, 1908.

6. Greffea seychellensis, sp. nov. (Fig. 2.)

@. Caput elongatum, leve. Pronotum et mesonotum leve. Segmentum medianum

longius metanoto. Elytra ovata, marginem posticum segmenti mediani haud attingentia.

Alz elongate, segmentum 4 abdominis vix attingentes; ared posticd hyalina, ad

marginem exteriorem vix rosea. Cerci elongati, lanceolati. Operculum elongatum,

acuminatum, abdomen vix superans. Femora inermia, carina inferé mediana subtiliter

denticulata.

Long. corp. 106 mm. antenn. 163. cap. post antenn. 53. pron. 54. meson. 20.

metan. cum segm. med. 12. segm. med. 7. abdom. 59. cere. 8. elytror. 9. alar. 24.

fem. ant. 34. fem. int. 16. fem. post. 20.

Reddish-brown, with dark irregular spots. Head light reddish-brown, with longi-

tudinal dark lines, lighter on the cheeks and the occiput, elongate, smooth, with a fine

longitudinal groove behind each eye, small eyes and large cheeks. Antenne dark,

distinctly articulated, shorter than the front femora. Prothorax short; prosternum

almost as long as broad. Mesonotum dark-spotted, smooth, elongate, slightly wider in

front. Median segment longer than the metanotum. Abdomen elongate, segments

nearly 23 times as long as broad, the three last not much shorter. Anal segment with a

small median longitudinal keel. Cerci long, narrow, lanceolate. Operculum boat-shaped,

elongate and pointed, extending very little beyond the extremity of the abdomen. The

lower valvulz of the ovipositor are filiform. Elytra oval, not extending to the posterior

end of the median segment: veins well-marked, light on the dark-brown ground. Wings

long, reaching nearly to the posterior edge of the 4th abdominal segment: posterior part

transparent, slightly rose-coloured at the outer margin. Front femora bent at the base ;

with four carinz, of which the two upper ones are very near together and smooth. The

lower and inner carina is slightly notched in all the femora. Tibize all unarmed. Front

tarsi much elongate. (C. Ferriére.)

Loc. Seychelles. Silhouette: 1 adult ? beaten from a native palm (Stevensonia) in

the high forest above Mare aux Cochons, 27. [X. 1908; 1 immature ¢ from high damp

forest near Mont Pot-i-eau, about 2000 ft., VIII. 1908. Mahé: 1 adult ? and several

very young ? from high forest near Morne Blanc, X—XI. 1908; Cascade Estate,

1 immature ¢, 1908—9. Praslin: 1 immature ?, XI—XII. 1908. The very young

specimens were bright green when alive, two of the youngest with a dark median

longitudinal stripe on the thorax and abdomen. The colour of the adults is described

above (from the dried specimens) as reddish-brown, but during life was probably greyer

(Scott).

The genus G'reffea till now has been found only in the Polynesian islands. It is

therefore interesting to find it represented in the Seychelles, so far from its geographical

300 PERCY SLADEN TRUST EXPEDITION

centre. The fact that it has not been found either in the East Indies or in Ceylon makes

its presence in the Seychelles more curious.

That this species is a true Greffea seems to me to be quite clear from a consideration

of its various characters. In general structure it resembles G. lifuensis Sharp (in

A. Willey’s “Zoological Results,” Part I, 1898, p. 86, pl. 9, fig. 21), the type ? of which

I have examined in the Cambridge University Museum; but differs from it by its more

slender form, its smooth mesonotum and by the much more developed elytra and wings.

(C. Ferriére.)

No. XVIIL—NEW FISHES FROM ALDABRA AND ASSUMPTION, COLLECTED

BY MR J. C. F. FRYER.

By C. Tate Recan, M.A.

(CoMMUNICATED BY PROF. J. Stantey Garpiner, M.A., F.R.S., F.L.S.)

Read Ist February 1912.

A SMALL collection of fishes from the Indian Ocean made by Mr J. C. F. Fryer and

sent to me for determination by Professor Stanley Gardiner, includes examples of three

species apparently new to science, including a new eel of some interest, as although it

seems to be an Anguillid in most of its characters, it has the branchial openings into the

pharynx small, as in the Mureenidee.

Family Anguillide.

XENOCONGER, gen. Nov.

Body elongate, naked; dorsal and anal fins well developed, confluent with the

reduced caudal; no pectorals or ventrals. Snout broad and flat; nostrils lateral, the

anterior with a short tube. Mouth terminal, moderately wide; maxillary ending just

behind eye, not extending to angle of mouth. Teeth pointed, conical or slightly com-

pressed, forming broad bands in the lower jaw; maxillary teeth biserial ; vomerine teeth

a rounded patch continued backwards as a pair of curved bands, each of a smaller outer

and larger inner series.

Palato-pterygoids present, anteriorly embracing the vomer; lower pharyngeals con-

vergent anteriorly, not separating the other branchial arches; tongue not free; branchial

openings into the pharynx small; external branchial apertures lateral, of moderate size.

Apparently nearest to Nettastoma and its allies, but differing widely in the short

snout and restricted inner branchial apertures.

1. Xenoconger fryeri, sp. n.

Tail nearly twice as long as rest of fish ; head about 2 of the length from gill-opening

to vent; head as broad as deep, its depth less than } its length; snout rounded anteriorly,

slightly broader than long, its length nearly + the length of head and 3 times the

diameter of eye. Jaws equal anteriorly ; cleft of mouth horizontal, extending behind eye

a distance equal to the diameter of the latter. Anterior nostril near end of snout ;

posterior in front of lower part of eye. Dorsal commencing at a distance from the gill-

opening equal to 3 the length of head. Brownish, spotted or marbled with blackish.

A single specimen, 400 mm. in total length, from Assumption Island. Mr Fryer

captured it in a large pit in the rock, about 10 yards square and 10 to 15 feet deep, which

was apparently cut off from the sea although it was nearly full of sea-water.

302 PERCY SLADEN TRUST EXPEDITION

Family Gobiide.

PARTIOGLOSSUS, gen. nov.

Head and body strongly compressed ; head naked ; body covered with small scales.

Mouth terminal, protractile, very oblique; preemaxillaries with 6 canines, and with an

inner series of smaller teeth ; lower jaw with 4 or 5 canines on each side of the symphysis,

and with the lateral teeth smaller, uniserial. Gill-opening vertical, in front of base of

pectoral fin, not produced forward below. Two dorsals, the first of 6 spines, the second

of 16 or 17 rays; anal of a feeble spine and 15 soft rays; pelvics close together but

separate, each of a spine and 4 soft rays.

In the length of the second dorsal and anal fins this genus is intermediate between

Allogobius, Waite, 1904 and the other Gobiid genera with only 4 soft rays in the pelvic

fin. Allogobius has large scales, 10 soft rays in the second dorsal and 8 in the anal, the

head only slightly compressed, and the mouth not very oblique. Joglossus, Bean, 1882,

is nearer Parioglossus, but seems to differ in the wider gill-openings; it has 22 to 24 rays

in the soft dorsal. Vireosa, Jord. and Snyder, 1901, has a mental barbel, and Oxyme-

poton, Bleek. and Orthostomus, Kner, are distinguished by having at least 30 rays in the

soft dorsal and anal.

2. Parioglossus teniatus, sp. n.

Depth of body 6 in the length, length of head 5. Snout very short; mouth nearly

vertical, the articulation of lower jaw below the anterior margin of eye; diameter of eye

about 2 length of head. A dark band from eye to end of caudal fin; dorsals and upper

edge of caudal dusky.

Two examples, 25 and 30 mm. in total length, from the Pacard Lagoon, Aldabra.

The larger, probably a male, has the anal fin dark-edged and the dorsal fins higher, with

the rays more or less produced.

Family Blenniide.

3. Salarias aldabrensis, sp. n.

Depth of body less than length of head, 6 to 64 in the length of the fish. Anterior

profile somewhat convex, nearly vertical ; mouth subterminal ; lower jaw with a pair of

canines; a short fringed tentacle above the eye. Dorsal xiii—xiv 21—23, low, notched,

not continuous with the caudal. Anal 28, long and low. Body pale, with several pairs

of violet cross-bars ; fins pale, the spinous dorsal dark-edged.

Three specimens, 30 to 35 mm. in total length, from Dunes de Maistre, Aldanees

These fishes “sit on the rocks at low tide.”

No. XIX.—DIPTERA: LONCHAIDA, SAPROMYZIDA, EPHYDRIDA,

CHLOROPIDA, AGROMYZIDA.

By C. G. Lamp, M.A., B.Sc., Clare College, Cambridge.

(Plates 15, 16 and Text-Figures 1—33.)

(CoMMUNICATED BY PRoressor J. STANLEY GARDINER, F.R.S., F.L.S.)

Read 20 June, 1912.

Loncheide.

LoncH@A, Fallén.

Lonchea Fallén, Dipt. Suec., Ortal., (1820), p. 25.

1. Lonchea splendida Loéw, Beschr. Europ. Dipt., ii. p. 292.

Several specimens of this fine species were collected. It is known from the Medi-

terranean Region.

Localities. Seychelles. Bird Island, VII. 1908 (Fryer). Dennis Island, VIII. 1908

(Fryer). Mahé: Cascade Estate, about 800 ft. and over, 1908—9. Praslin: Cotes d’Or

Estate, XI. 1908.

2. Lonchea plumata, n. sp.

This is a black species with black legs; the calypters are pale and pale-haired ; there

is a long terminal abdominal segment in the ¢ like that of L. nequalis, Loéw.

$. The whole insect is uniformly black, including the legs.

Head (PI. 15, fig. 1). Frons nearly parallel-sided, slightly narrowing from the vertex

to the front fronto-orbital bristle. The vertex and the narrow eye-margins as far as the

insertion of the fronto-orbital bristles are very shining. The rest of the frons (including

the lower part of the eye-margins) is dull, but the space below the lunule and between

the antennal bases is covered with shining dust. The lower eye-margins are black.

Labrum just visible in front, antennal foveze shallow but evident. The face widens rapidly

from the frons to the mouth.

Eyes large, very long-oval in profile, bare.

Antennz with second joint somewhat greyish, third joint long and laterally com-

pressed, slightly concave in front in side view with a rounded tip, about four times as

long as broad, with tip extending almost to the mouth margin. Arista pale and thickened

SECOND SERIES—ZOOLOGY, VOL. XV. 39

304 PERCY SLADEN TRUST EXPEDITION

at the base, then black; it is very beautifully feathered, each ray being shaped like an

elongated S: there are about 18 rays each side. Palpi stout, fleshy, black and hairy,

somewhat compressed sideways.

One pair of fronto-orbital bristles, two pairs of verticals, the outer much weaker than

the inner, a fine pair of forwardly-directed divergent post-verticals, stout ocellars : in profile

the frons is seen to be finely haired all over.

Thorax. Dorsum clothed with adpressed hairs, but the hind part is bare. Scutellum

duller and greyish in colour. Bristles normal.

Wings (Fig. 1) pellucid with yellow veins, the fine costal ciliation black. Calypters

small, whitish yellow, pale-margined and white-haired.

Halters black with paler stalks.

Legs. Front: femora with two rows of long bristly hairs; tibize and tarsi clothed

with short bristly hairs. Middle: femora all covered with short bristly hairs, an inferior

posterior row of longer ones is conspicuous ; tibize with similar fine bristles and a terminal

crown of spines; tarsi with black bristly hairs. Hind: covered with fine bristly hairs,

among which is a somewhat conspicuous row below the femora.

Fig. 1. Lonchea plumata, n. sp., wing.

Abdomen. ¢. The last segment is slightly longer than the two previous ones

together (Pl. 15, fig. 2) and has the form of a truncate triangle with the end notched.

The two angular tips thus formed bear a bunch of black bristly hairs. The whole surface

dorsal and ventral is covered with similar hairs which are stouter on the margins of the

segments and towards the end of the last segment.

? like the male, except as follows :—Face about one-third as wide again as that of the

male ; abdomen with equal segments except the one before the ovipositor, which is a little

narrower ; the ovipositor is shining black, acicular, scarcely flattened, the sheath is paler.

Size about 4 mm.

Localities. Seychelles. Silhouette: Mare aux Cochons, over 1000 ft., IX. 1908.

Mahé: Port Victoria, XII. 1908; Long Island, VII. 1908; Anonyme Island, I. 1909 ;

marshy ground near sea-level at Cascade, 20. II. 1909 ; cultivated country about 1000 ft.,

XI.—XII. 1908; near Morne Blanc, about 800 ft., X.—XI. 1908; Cascade Estate,

800—1700 ft. and over, 1908—9; forest behind Trois Fréres, about 2000 ft., 14. I. 1909 ;

Mare aux Cochons district, about 1500 ft., I.—II. 1909.

3. Lonchea longicornis, n. sp.

A shining bluish-black species with red metatarsi, pale calypters with pale hairs.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 305

g. Head (PI. 15, fig. 3). Vertex and frons somewhat shining and slightly hairy ;

eye-margins smoother and more shining, especially from the vertex to the fronto-orbital

bristles: the front part of the frons and the lower part of frontal eye-margins dull. The

upper part of the eye-margins narrows considerably from the vertex to the fronto-orbital

bristles. A silvery spot lies between the bases of the antennze. Face with silvery dust

and a well-marked narrow central linear keel; the face widens rapidly from the antennze

to the mouth. Antennze close to eyes, so that in front view the antennee are markedly

divergent. Eyes bare. .

Antenne black with the third joint somewhat dusted inside, it is very long and

nearly parallel-sided, with an evenly-rounded tip extending in side view well below the

mouth margin ; arista long, and microscopically pubescent, brownish at the base, the rest

black.

One fronto-orbital bristle, fine post-verticals, long ocellars ; frons fine-haired in profile.

Palpi fleshy, black and hairy.

Thorax. Dorsum bristly-haired, both it and the pleure are shining black with

a distinct blue tinge. Scutellum also shining black but with a faint greenish tinge.

- Bristles normal.

Wings normal: venation much as the last species, but with the lower cross-vein

slightly more oblique ; brownish in colour, with yellow-brown veins.

Calypters pale with pale borders and hairs.

Halters all black.

Legs black except that all the tarsi are reddish-yellow. Front: femora with the

usual two rows of bristles with some irregular and shorter bristles between ; the upper

backwardly-directed row is regular, the lower downwardly-directed row has five or six

bristles which are not so long as usual. Middle: femora with a regular row of strong

hairs below ; tibize with only one stout inner bristle of the terminal crown evident. All

the legs covered with fine bristly hairs.

Abdomen. Ovate in outline with nearly equal segments and a bluntly-pointed tip.

From a top view it is seen to be bordered with long fine black bristles; the outer corners

of the second segment with abundant black hairs; dorsum with longish bristly hairs but

no very evident marginal bristles.

?. Frons wider than in male, nearly parallel-sided. Ovipositor long black non-

flattened with a black sheath ; when fully extended it is nearly as long as the rest of the

abdomen.

Size about 3 mm.

Locality. Seychelles. Mahé: Cascade Estate, about 1000 ft., 1908—9.

4. Lonchea vibrissifer, n. sp.

A black species with yellow metatarsi, calypters pale and pale-haired, and with very

long vibrissz.

39—2

306 PERCY SLADEN TRUST EXPEDITION

g. Head (PI. 15, fig. 4). Frons dull, slightly narrowimg from the vertex to the

antennze ; in side view it is seen to be bristly-haired ; the bristles on the eye-margins bend

backwards, those on the disc of the frons bend forwards, so that in profile the frons appears

to be covered with bristles crossing about at right angles. Upper eye-margins which

include the vertical and fronto-orbital bristles are bristly, slightly shining and rather short.

Face slightly silvery, widening rapidly from antennz to mouth. Jowls very evident, black-

haired. Eyes bare.

Antenne: third joint black, slightly dusted, short, about twice as long as broad:

when looked at from in front the tip of the antenna does not reach the curved mouth

margin by about half the length of the third joint. Arista pale at base then black, micro-

scopically pubescent.

The bristles are normal, the ocellars being stout. There is a prominent stout vibrissa

on each side of the mouth.

Palpi retracted, brownish black.

Thorax. Shining black with normal bristles and stout bristly hairs extending nearly

up to the prescutellar bristles. Scutellum same colour as thorax.

Wings (Fig. 2) brownish in tone with brown-yellow veins. Calypters pale with pale

borders and hairs.

Halters black with stalks slightly paler in the middle.

Legs all black except that the metatarsi and the next joint in the front and middle

legs and the next two joints in the hind legs are yellow. The front femora have the

inferior row of bristles longer than usual, forming a regular comb. Middle femora with

a stout ciliation below and the tibize with no crown of spines.

Abdomen similar to the last species but somewhat more truncate at the tip.

¢ with a wider frons, the ovipositor short and much flattened, with a pale sheath.

Size a little over 3 mm.

Localities. Seychelles. Silhouette: plateau of Mare aux Cochons, over 1000 ft.,

IX. 1908. Mahé: Cascade Estate, about 1000 ft.; Morne Seychellois, over 1500 ft.,

4, II. 1909.

LAMB—DIPTERA: LONCH HIDA, SAPROMYZIDA, EPHYDRID, ETC. 307

Sapromyzide.

PacHYCERINA, Macquart.

Pachycerina Macquart, Suite & Buffon, i. (1835), polls

5. Pachycerina seychellensis, n. sp.

This species must be closely related to P. yavana Macq.

3. Head (PI. 15, fig. 6). Frons dull yellow orange, paler towards the vertex ; the

ocellar spot dull black, nearly circular, but slightly drawn out to the vertex. The two

- fronto-orbital bristles stand on greyish spots, the spot of the hind one is the larger and

is connected to the vertex by a continuing pale greyish line. Face very shining yellow

from just above the antennal base to the mouth margin ; it has the usual two roundish black

shining spots. Palpi with black heads, the rest yellow. Tongue yellow.

Two fronto-orbitals, inner and outer verticals, crossed post-verticals, very fine ocellars

between the ocelli, and a very fine pair on the vertical black spot just at the vertex. Hind

head bristled on the eye-margins below the outer verticals. A fine row of hairs bordering

the cheeks and on the jowls.

Antennz yellow; the first joint pyriform, second cylindrical, bristled at the apex

beneath and at the base on top, third very long and gradually tapering to a blunt end;

arista black with very dense stout feathering.

Thorax. Dorsum shining, marked longitudinally with brownish and yellowish stripes.

Three dorso-central bristles, the last two in the same transverse row as the prescutellar

pair of bristles, and two regular rows of achrosticals. The surface has also various

scattered hairs; some of these form well-defined side rows of small bristles, seen best on

viewing the thorax sideways; one such row is a continuation of the dorso-central bristles,

another runs roughly parallel to the line of those bristles, but is more remote from the

centre line of the dorsum; this row begins a little before the front dorso-central bristle

and ends a little before the third. The yellowish stripes are between the achrostical rows

and on the line of the dorso-centrals, and extend to the front of the thorax ; between

these three rows are the two brownish stripes. A similar short brownish stripe runs from

the intra-humeral bristle to the front of the thorax; between this and the three post-

humeral bristles the humeri and dorsum are again yellow, which colour continues from the

side row of bristles over to the hind part of the pleure.

Pleurze yellow with a broad brown stripe extending from the wing base to the front,

a similar narrow stripe on the sterno-pleural suture.

Scutellum yellow, slightly darkened centrally and at the base, dise somewhat flattened,

the usual four strong bristles.

Wings normal in venation, yellow but slightly darkened along the costal edge ; veins

yellow.

Halters yellow.

Legs with the usual preapical tibial bristle. Front: femora yellow, brownish on the

upper surface with three rows of stout bristles, the underneath row the strongest, tibiz

308 PERCY SLADEN TRUST EXPEDITION

black with extreme tip yellowish; tarsi all black, the last joint with long hairs on the

dorsal surface. Middle: all yellow with a crown of two spines on the end of the tibia.

Hind: yellow.

Abdomen. Shining yellow brown to blackish with a few scattered hairs; the hind

margin of the segments with a row of very long bristles, especially well developed on the

third and fourth segments, these marginal bristles extend over the sides. The terminal

segments of the ¢ form a distinct hypopygium of rounded outline, a ventral view of which

is given in PI. 15, fig. 5; the last segment has a pair of projecting processes with a fine

horny process between. Sixth segment with two black dots.

¢. The female is similar to the male but has a somewhat pointed abdomen.

Size, excluding antenne, 4 mm.

Localities. Seychelles. Silhouette: near Mt. Pot-d-eau, about 1500 ft., VIII. 1908 ;

Mare aux Cochons, IX. 1908. Mahé: Long Island, VII. 1908; marshes on coastal plain,

Anse aux Pins and Anse Royale, I. 1909; from grass in cultivated country, about 1000 ft.,

XII. 1908; near Morne Blanc, 800 ft., XI. 1908; Cascade Estate, ca. 1000 ft., 1908—9.

6. Pachycerina obscuripennis, n. sp.

In general form and characters this species is much like the last, it is, however, a very

dark suffused form. The differences are given below.

é. Head. The ocellar spot is elliptical in outline, extending over the vertex with the

hind pair of ocelli standing on its minor axis. The grey line joining the vertex to the

upper fronto-orbital bristle is more evident and broader. Antenne: first and second joints

dark brown, the second with more hairs, arista more densely haired.

Thorax. Dorsum all black brown, the colour extending right up to the scutellum,

with a fine yellow line between the achrostical bristles and a yellow border extending from

the humeri to round the edge of the scutellum.

Wings suffused with black, darkening towards the costa.

Halters black.

Legs, front femora yellow with a black tip.

Abdomen. All shining black with appendages like those of the former species.

Size as last species.

Locality. Seychelles. Silhouette: forest above Mare aux Cochons, IX. 1908.

Sapromyza, Fallén.

Sapromyza Fallén, Dipt. Suec., Ortal., (1820), p. 29.

Sub-gen. SAPROMYZA, sens. str.

7. Sapromyza striata, n. sp.

This species has the general appearance and the long plumose antennz of the

‘sub-genus Minettia, but it has only one intra-alar bristle visible.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 309

Head (PI. 15, fig. 7). Frons dull, whitish yellow, a slightly darker indistinct stripe

extends from the vertex to the base of the antenne. Face white. Back of head yellow

behind the vertex, blackish behind the eyes; below the yellow part are two silvery dots

with black bristly hairs on them. Chzetotaxy normal, but the post-verticals long and

crossed not merely convergent.

Antenne yellow, slightly darkened inside at the tip; arista brown at base with black

flagellum, long haired on the top with about 15 rays, shorter rayed below.

Palpi black ; tongue pale.

Thorax. Dorsum pale brownish white with two broad brown stripes extending from

just above the shoulders over dorsum and over scutellum where they are confluent, so that

the scutellum may be said to be brown with whitish sides. Between the two brown dorsal

stripes is a whitish stripe, all three being of approximately equal breadth in front.

Cheetotaxy normal with three dorso-centrals; the achrosticals are arranged in eight

roughly parallel and equidistant rows of equal sized bristles. Pleurze yellowish white.

Wings as Fig. 3; spotted, with yellow veins.

Halters yellow.

Fig. 3. Sapromyza striata, n. sp., wing.

Legs all yellow. Front: femora with conspicuous rows of spines on the lower and hind

sides. Middle: femora with a row of five spines on the front side at the tip; tibiae with

a crown of spines at the tip. All the legs have the usual covering of small bristly hairs.

Abdomen. Yellow, the boundaries of the segments edged with black, the edging of

all but the third segment being marginal, that of the third somewhat remote from the

margin. A black and slightly interrupted median line runs along the dorsum of the

third to the fifth segments joining each transverse black line to the base of the segment.

Size, excluding the antennz, 44 mm.

Localities. Seychelles. Silhouette: near Mt. Pot-i-eau, about 1500 ft., VIII. 1908 ;

Mare aux Cochons and forest above, [X. 1908. Mahé: high damp forest between Trois

Fréres and Morne Seychellois, about 1500—2000 ft., XII. 1908. Praslin: Cotes d’Or

Estate, XI. 1908. Félicité: forest, XII. 1908.

Note. This species must be closely related to Lauxania (Sapromyza) bilineata

Speiser, Wiss. Ergebnisse d. Schwed. Zool. Exp. nach dem Kilimandjaro, Dipt. p. 173.

The next two species are structurally very similar as regards shape of head, nature of

cheetotaxy, size, etc. The principal difference is in the antenne.

310 PERCY SLADEN TRUST EXPEDITION

8. Sapromyza funebricornis, n. sp.

Head (Pl. 15, fig. 8). Frons dull brownish yellow, eye-margins and ocellar spot

somewhat shining. Face whitish yellow, jowls with scattered bristles, vertex bristly along

edge from centre round the eye-margins. Antenne with first two joints brownish, third

joint black ; arista sub-plumose, black, the basal joint pale.

Palpi pale, filiform, with a few long bristles on the lower side.

Cheetotaxy normal, post-verticals crossed about half-way ; all the bristles stout.

Thorax. Greyish yellow, uniformly covered with tiny bristles; between the dorso-

central rows these form the achrostical bristles which are somewhat irregularly arranged in

six rows, the four middle rows being fairly regular and equidistant, the bordering rows

more irregular.

Cheetotaxy normal with (1+2) dorso-centrals, humeral, two post-humeral, one

presutural, two supra-alar, one intra-alar, two prescutellar.

Scutellum the same colour as the thorax, broadly rounded at the tip.

Wings (Fig. 4) slightly tinged with yellow; veins yellow.

Fig, 4. Sapromyza funebricornis, n. sp., wing. Fig. 5. Sapromyza mahensis, n. sp., wing.

Halters yellow.

Legs all yellow. Front femora with the usual two rows of bristles towards the end

on the posterior side, both upper and lower rows have about three bristles ; the interior

lower side (where it would be clasped by the tibia if the leg were closed) has a distinct

row of tiny bristles on the tip third. Middle femora with a stout row of some five bristles

on the distal end of the anterior side, tibize with a crown of spines. Hind femora evidently

ciliated beneath, the ciliation beginning at the middle and getting longer towards the tip.

The bristly hairs so commonly present on the ventral parts of the middle and front sterno-

pleuree and on the coxze are very well developed.

Abdomen. The same colour as the thorax; margins with stout bristles which

extend over to the margin of the succeeding segment. The surface has scattered hairs.

The segments diminish slightly in size from the second to the last.

In the male there is a slightly swollen hypopygium, but none of the specimens

possessed the appendages referred to in the next species.

Size, excluding antenne, 3} mm.

Localities. Seychelles. Silhouette: low coconut-planted country near the coast,

Pointe Etienne, 17. IX. 1908; Mare aux Cochons plateau, one specimen, IX. 1908.

LAMB—DIPTERA: LONCHAIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 311

Mahé: marshes on coastal plain, Anse aux Pins and Anse Royale, I. 1909; Long

Island, VII. 1908; Anonyme Island, I. 1909 ; Mare aux Cochons district, 1000—2000 ft.,

one specimen, I.—II. 1909. All the specimens except two (indicated above) are from

near the coast.

9. Sapromyza mahensis, n. sp.

This species is very closely allied to the preceding with which it is compared.

Head. Form very like last: antennz all pale yellow; third joint slightly larger ;

arista differs as follows: in S. funebricornis the top rays are long at base and diminish to

the tip, the lower rays are finer and shorter at the base than at the apex so that the

upper and lower rays are of about equal length for the distal two-thirds of the arista:

in S. mahensis the rays are finer, more distant and on the top are of equal length for

about the first two-thirds of the arista; below they are nearly as long as above, fine

and also equally long for the first two-thirds of the arista. The venation (Fig. 5) differs

slightly as will be seen from Figs. 4 and 5.

The bunches of hairs on the sterno-pleuree and coxe are less stout. The whole

insect is more shining and of a clearer yellow colour.

In a few specimens the male genitalia are extruded (Pl. 15, figs. 9, 10). These

have a median lobe hooked at each side and notched in the middle, two side hooked

appendages and a little fleshy hump covered with hairs. In most specimens this is

retracted, when the insect has a somewhat swollen knobby hypopygium.

Size as last species.

Localities. Seychelles. Mahé: Long Island, VII. 1908; Anonyme Island, from

grass, ete., I. 1909; marshes on coastal plain, Anse aux Pins and Anse Royale, I. 1909;

cultivated country near sea-level at Cascade, II. 1909.

10. Sapromyza nudiuscula, n. sp.

Head (PI. 15, fig. 11). Frons and face entirely the same dull bright yellow: clypeus

visible in front : mouth margin slightly but sharply produced as seen in profile. Antenne

bright yellow, third joint shortish oval, arista brownish but pale at the base and very

finely pubescent.

Palpi yellow, narrow, with a few fine hairs.

Bristles less strong than the last two species.

Thorax. Dorsum yellow to brownish yellow covered with fine black bristles (1+ 2)

dorso-centrals: achrosticals in four regular rows with no irregular bordering ones.

Chetotaxy quite normal with smaller and less stout bristles than the preceding two

species. Scutellum distinctly flattened on the disc.

Wings narrower but with venation like S. mahensis, barely tinged with yellow;

veins pale.

Halters yellow.

Legs all yellow. Front femora with the usual two rows of bristles behind both very

long ; the upper row has six to seven bristles and extends from base to tip of femur, the

SECOND SERIES—ZOOLOGY, VOL. XV. 40

312 PERCY SLADEN TRUST EXPEDITION

lower row has four bristles, the basal ones being the longer, and also extends all along

the femur. Middle tibize with the terminal crown reduced to one long bristle inside.

Hind femora with one or two fine terminal bristles outside, tibiz with one very short

stout spine at the end.

The coxal and sterno-pleural hair bunches are sparser and shorter than in the last

species.

Abdomen. Yellow; surface bristly; marginal bristles present ; segments of nearly

equal length.

Size about 3 mm.

Localities. Seychelles. Mahé: near Morne Blanc, X. 1908. Silhouette: near Mt.

Pot-d-eau, about 1500 ft., VIII. 1908.

11. Sapromyza crassicaput, n. sp.

A single specimen was collected of this species, which is at once distinguished by

its unusually large head. It has two brown-black spots on the fourth abdominal segment;

except for this and the somewhat infuscate front legs, it is entirely yellow.

$. Head (Pl. 15, fig. 12). The frons is a slightly duller but brighter yellow than

the rest of the insect: ocelli reddish. Back of head with regular bristles recalling the

post-ocular bristles of the Dolichopide ; cheeks bristly.

Palpi yellow and hairy. The usual two fronto-orbital bristles present, inner and

outer verticals, post-verticals somewhat below the vertical margin towards the back of

the head and crossed, ocellars more delicate.

Antennee all yellow including the basal joints of the arista, third joint fairly long,

aristal flagellum black and slightly pubescent.

Thorax. Three dorso-centrals ; the arrangement of the achrosticals is rather difficult

to observe as the dorsum is depressed by the pin, they appear to be irregularly six-rowed.

Other bristles normal. ,

Wings normal, glassy with yellow veins.

Halters yellow.

Legs yellow except that the front pair are slightly infuscate, especially on the

tibie and tarsi, and that the middle tarsi are the same. Front femora with the usual

row of backwardly-directed bristles above and a row beneath.

Abdomen. Finely haired; marginal bristles on all but the middle part of the

segments. <A large black spot on each side of the fourth segment occupying nearly the

whole breadth.

Size, excluding the antenne, 33 mm.

Locality. Seychelles. Mahé: Cascade Estate, 800 ft. or more.

12. Sapromyza perpunctata, n. sp.

A single specimen was collected belonging to the group with pictured wings.

Head (PI. 15, fig. 13). Vertex and frons brown, yellow above the antenne. The

ocelli on a distinct tubercle, fronto-orbital bristles on small black spots. Face brown.

LAMB—DIPTERA: LONCH HID, SAPROMYZIDA, EPHYDRIDA, ETO. 313

Two fronto-orbital bristles, verticals, post-verticals a little below vertex on back of head,

ocellars. Antenne: first two joints dark brown, third paler; arista pale with fine

pubescence.

Thorax. Black-brown variegated with ochreous patches. Dorso-central bristles

(1+8) each standing on a black spot in the ochreous patch. Pleurze black-brown with

ochreous-grey patches, the bristles standing on small black spots on the grey patches.

Scutellum as thorax with a pale terminal and two side spots.

Wings variegated as in Fig. 6; darkened between costa and fourth vein, a white

spot behind auxiliary vein, three (the middle smallest) between the costa and _ first

vein, two between first and second, two rows of small spots between third and

fourth, a spot in front of cross-vein; tip between second and third white. Between

the fourth vein and the margin the wing is marked like that of a Tephritid.

Halters black.

Legs: femora all ringed with two black and two ochreous rings, beginning with a

proximal black ring; tibiz yellow with an indistinct ring proximally. Tarsi all yellow.

Fig. 6. Sapromyza perpunctata, n. sp., wing.

Front femora with the usual backwardly-directed top row of bristles and an underneath

row, the latter long. The middle tibize have a fine terminal spine in addition to the

preapical bristle.

Abdomen. Brownish-black like the thorax. On each distal and proximal margin

is a central triangular pale spot, the proximal ones being the larger; the apices of these

meet in the case of the second segment and nearly meet in the others, hence this row of

spots forms an interrupted median line: on the distal margin of each segment there is also

a row of pale circular spots three each side on the second segment, two each side on

the third, fourth and fifth; each pale spot has a black central dot from which proceeds

a marginal bristle. There are also a few other minute dots near the proximal margin of

the segments and on the disc of the same.

Size, excluding antenn, 23 mm.

Locality. Seychelles. Mahé: Cascade Estate, about 1000 ft., 1909.

Sub-gen. Homoneura, De Meijere.

Homoneura De Meijere, Tijdschr. voor Entom., li. (1908), p. 142.

Three species belong to this sub-genus, but none of them fit in with the cha-

racters in the table given by De Meijere (/.c.), nor with any hitherto published descrip-

tions.

40—2

314 PERCY SLADEN TRUST EXPEDITION

13. Homoneura varifrons, n. sp.

Head (Pl. 15, fig. 14). Dull-black behind and forward to before the antennze

where the frons is bright orange-yellow: the side stripes on which the fronto-orbital bristles

stand are shining brown-black and extend far forward on the frons to the yellow cross-

line: the margins between these stripes and the eyes are distinct from the stripes and

are dark reddish-brown; the ocellar spot is shining, and a long-pointed frontal triangle

extends forward from the spot which is perceptibly more shining than the rest of the

central part of the frons though its boundary is not well defined. The face is entirely

orange-yellow as are the eye-margins below and the jowls.

Antenne: first and second joints dark orange, third with its apical two-thirds

blackish, the rest of it dark orange; the degree of darkening is somewhat variable.

Arista with the basal joint and first part of second stout, basal joints pale, flagellum

black with a black plumosity, which is longest at the base and tapers thence to the tip,

the rays below are shorter and of fairly equal length.

Palpi darkened orange, especially on the under surface. Tongue orange with fleshy

tip. Head bristles normal; a row of fine bristles on the lower eye-margin above the

mouth edge; jowls bristly.

Fig. 7. Homoneuwra varifrons, n. sp., wing.

Thorax. All completely black, moderately shining; dorsum with a very faint brown

pollination, pleuree very slightly shining. Bristles normal, prescutellars rather small,

achrosticals in six rows. Pleurz very slightly silvery.

Wings (Fig. 7) almost glassy, very slightly tinged with yellow; veins yellow.

Halters with dark knobs and yellow stalks.

Legs. In the two males the legs are all pale yellow; front femora with the usual two

rows of bristles behind, top row with about six equal bristles, lower row three towards

the tip succeeded by a ciliation. Middle femora with two bristles at the end which are

longer than the other normal bristles, tibize with a crown of two long bristles as well as

the usual preapical one. Hind femora with an evident preapical bristle on the front side.

Abdomen. Black with marginal bristles and small ones on the surface. The male

genitalia much as Pl. 15, figs. 9, 10 but not extruded.

The females, in most cases, have slightly darkened middle and hind femora, the

darkening extending nearly all over the joints; the extent of this suffusion varies, and

in one case the legs are pale like the male.

Size, excluding antenn, about 22 mm.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 315

Localities. Seychelles. Silhouette: Mare aux Cochons, over 1000 ft., VIII.—IX.

1908; near Mt. Pot-d-eau, about 1500 ft., VIII. 1908. Mahé: Cascade Estate, ca. 1000 ft.,

1908—9 ; Anonyme Island, from grass, ete., I. 1909.

14. Homoneura atra, n. sp.

This species is in facies exceedingly like the last. The thorax and abdomen are also

completely black, but the slight pollination is practically absent, and the pleure are not

slightly silvery. The differences between the two species are given below.

Head. Frons, face and jowls entirely black except for a small brown space just

above the antennz and the brownish lower eye-margins. Antenna with the third joint

brown, the others black. Palpi black.

All the legs are slightly darker orange; front femora darkened, middle and hind

femora quite black.

Size as last.

Locality. Seychelles, Silhouette: Mare aux Cochons, over 1000 ft., IX. 1908.

15. Homoneura pulchrifrons, n. sp.

Head. The central area of the frons is of a very striking deep velvety black ; the

side stripes on which the fronto-orbital bristles stand are broad and shining black, they

extend right up to the eyes and are joined across the vertex by a narrow shining strip

from which the front point of the small shining ocellar triangle projects. The back of the

head is also shining black except for a central silvery spot. Face with the top half

shining black, the lower half yellow, the broad eye-margins are paler yellow. Below the

antenng on each side of the eye-margin is a silvery spot. Jowls yellow.

Palpi black, tongue yellow.

Antennz entirely velvety black, arista plumose with the longest rays on top at base

tapering to the tip, shorter and more uniform in length below.

Thorax. Dorsum somewhat shining brownish black, slightly dusted, with the

humeral calli and a line from them over the wing bases brownish yellow : sterno-pleurse

brown. Scutellum as the thorax but slightly paler round the margin and pale below, the

metanotum is yellow.

Wings slightly yellow, tinged with brown-yellow veins.

Halters yellowish with browner knobs.

Legs all yellow: front femora with the usual two rows of bristles, the upper extending

nearly to the base with five or six bristles, lower with two distinct bristles on the distal

third : middle femora with a distal row of four or five bristles on the front side, tibize with

a crown of two spines as well as the preapical bristle ; hind femora with small preapical

bristle.

Abdomen. Moderately shining black, with marginal bristles and small general

bristles.

Male hypopygium with a central lobe and two side hooks, the central lobe itself

ending in two hooks.

‘LIBRARY

316 PERCY SLADEN TRUST EXPEDITION

Size as last species.

Localities. Seychelles. Silhouette: from near Mt. Pot-a-eau, about 1500 ft., VIII.

1908; Mare aux Cochons and forest above, IX. 1908. Mahé: from near Morne Blane,

X. 1908; high forest of Morne Blane and Pilot, XI. 1908; Mare aux Cochons district,

about 1500 ft., I—II. 1909. Praslin: Cétes d’Or Estate, XI. 1908.

Ephydride. Notiphiline.

ACANTHONOTIPHILA, n. g. (PI. 15, fig. 23).

This genus comes near Notiphila, Fallén.

Head. [Eyes longish oval with the major axis vertical and the radius of curvature

greater at top than bottom. Jowls present. Face and frons broad, nearly parallel-sided,

in profile somewhat hollowed beneath antenne. Hind head somewhat protuberant.

Vibrissze present. Prelabrum visible.

Bristles ; inner and outer verticals, two upper fronto-orbitals (bent outward), two

lower (bent forward); divergent ocellars; fine post-verticals, two pairs of stout bristles

on the frons.

Antenna as in Notiphila; the second joint bristly with a very stout terminal spine ;

the arista with few rays (three in the typical species).

Fig. 8. Acanthonotiphila coriacea, n. g. et n. sp., wing.

Thorax and scutellum covered with stout bristly hairs, which are arranged in

moderately regular rows; they are similar in character all over the dorsum so that there

is no distinction between the achrostical and the other rows. A pair of prescutellars but

no definitely assignable dorso-centrals : one humeral, one intra-humeral, two noto-pleural,

two supra-alar, four scutellar (the terminal pair crossed at the tips), two meso-pleural, one

sterno-pleural.

Wings (Fig. 8), costa to third vein but also rather thickened between third and fourth

veins, bristly to the first, the last bristle being longer and like a small spine; third vein

with three or four bristles on the dorsal side, where it is met by the second vein.

Abdomen with segments of nearly equal length.

The texture of the insect is coriaceous.

Type, the following species.

16. Acanthonotiphila coriacea, n. sp. (Pl. 15, fig. 23).

Head. Frons darkish grey, the bristles standing on minute black spots ; the frontal

triangle is marked out by two rows of slightly converging fine hairs which begin from the

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 317

inner vertical bristles. Inside the triangle stand the ocellar bristles, two smaller slightly

convergent bristles just beyond the front ocellus, and two stout parallel bristles nearly in

a line with, but proximate to, the line joining the front pair of fronto-orbitals. There are

a few hairs in the space between the frontal triangle, the eyes and the last fronto-orbital

bristle.

Face slightly widening to the mouth, somewhat silvery, the prelabrum yellowish on

its margin. Jowls about one-fifth the vertical height of the eyes. Two vibrissz on each

side and a bristle on the jowl below the eye. Back of head the same colour as the frons.

Antennz with first and second joints yellow, third joint brown. Arista with three side

and one terminal rays.

Palpi yellow with a few stout black hairs below ; tongue rather horny.

Thorax. Olivaceous with minute granular pollination; chetotaxy as in generic

description ; scutellum darker but paler at the tip; pleure dark grey, slightly shining,

hairy on the meso-pleura and about seven hairs on the sterno-pleura, three in a horizontal

row at the top and four in a vertical row from the mid-point. Metanotum somewhat

shining, silvery grey.

Wings glassy with yellow veins, costa ciliated with fine closely-packed black hairs,

stouter on the first section.

Halters pale.

Legs. Coxe yellow; femora all dark brown-grey except the knees ; tibize suffused ;

tarsi yellow except the last joint in hind and middle and last two joints in front legs. All

the legs clothed with short bristly hairs; a longer row below the front femora; a stout

spine at the end of the middle tibia. The hairs on the tarsal joints are exceptionally

evident.

Abdomen. Shining brown-black, the last segment being the darkest; the distal

margins of the segments are very narrowly lined with a paler tone. Dorsum covered with

bristly hairs, the marginal ones longer: the last segment has some eight still longer

bristles, which stand out more nearly perpendicular to the surface.

Size. 21 mm.

Locality. Seychelles. Mahé: from seaweed on beach at Anonyme Island, I. 1909.

PARALIMNA, Loéw.

Paralimna Loéw, Monograph of the Diptera of N. America, i. (1862), p. 138.

17. Paralimna lineata De Meijere, Tijdschr. voor Entom., li. (1908), p. 165.

This species was described from Semarang: the specimens from the Seychelles agree

closely with the description.

Localities. Seychelles. Mahé: from marshy ground just behind the beach at Port

Glaud, 5. XI. 1908; marshy ground near sea-level at Cascade, 20. II. 1909.

318 PERCY SLADEN TRUST EXPEDITION

Hecamepe, Haliday.

Hecamede Haliday, Ann. Mag. Nat. Hist., ser. 1, ili. (1839), p. 224.

18. Hecamede lacteipennis, n. sp.

This is a very distinct and brightly-coloured species.

Head (Pl. 15, fig. 15). Frons with a large grey triangle extending to the lunula,

eye-margin grey, the rest of frons orange-yellow: this colour thus forms two triangles

pointing backwards from the front margin: the lunula is whiter. The bristles are as

follows: inner and outer verticals, a pair of bristles just behind the line joining the hind

ocelli, two other pairs near the margin of the triangle, the pair nearer the back of the head

being about half-way down the triangle, the other pair half-way between the former pair

and the point of the triangle; in addition the triangle has some dozen bristly hairs

of which two form a distinct pair just at the tip of the frontal triangle. There are two

pairs of fronto-orbital bristles, the front pair bent forwards, the other backwards. The

face is silvery white with a distinct suture running up each side to meet the margins

of the lunula: just along the side of this suture is a row of three vibrissz, the

top ones standing on a very small hillock; the facial knob is small, shining and very

prominent.

Fig. 9. Hecamede lacteipennis, n. sp., wing.

The jowls are shining silvery and have only one or two fine bristles instead of the

many bristles of H. albicans; the tongue is reddish-yellow with its bent tip only about

half the length of that of the latter species. The palpi are pale yellow.

Antenne as in H. albicans, with pale yellow second joint and slightly darkened third

joint ; arista short with four side and one terminal rays.

Thorax. Similar in form to H. albicans but is pale grey in colour like the

abdomen of that species; its surface and that of the concolorous scutellum is uniformly

covered with short stout bristly hairs; chetotaxy normal including the six scutellar

bristles.

Wings as Fig. 9, white, with perfectly pale veins.

Halters yellow.

Legs yellow except the femora which are rather dark silvery grey; the last tarsal

joint somewhat suffused.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 319

Abdomen concolorous with thorax, except that the base is often slightly reddish ;

dorsum with sparse scattered bristles, those on the last two segments being longer.

Size. 2 to 24mm.

Localities. Astove Island: 1907 (Thomasset). Coetivy: 24. TX. 1905. Seychelles :

Mahé, from seaweed on beach at Long Island, VII. 1908.

Mosttuus, Latreille.

Mosillus Latreille, Hist. Nat. Ins. et Crust., xiv. (1804), p. 389.

19. Mosillus albipennis Loéw, Stettin. Ent. Zeit., viii. (1848), p. 14.

This species is recorded from 8. Europe, Egypt and Teneriffe. The Cambridge

Collection contains several specimens from Durban, Natal.

Locality. Seychelles. Mahé: one specimen from Anonyme Island, I. 1909.

Encuastss, n. g. (Pl. 15, fig. 21).

A single specimen (in excellent condition) of a new genus near Moszllus was in the

collection; though but a single specimen is available it is thought best to give a full

description of the proposed genus, as the insect is of considerable interest. The genus

Mosillus was long considered to be in the Chloropide, but was finally placed among the

Ephydrid from the presence of certain structural details, although the general facies is

very strongly that of a black Chloropid. The present insect is similar to Mosillus in

many important respects but is more Ephydrid in form and is of a dull green surface

which is slightly shagreened, recalling the texture of Pelzna.

Head. Eyes bare, long, oval with axis vertical; jowls deep. Antenne with

rounded third joint, which is but little larger than the second; the basal bristle on

the second joint is minute though evident. The top fronto-orbital bristles are small and

in line with the front ocellus, the other fronto-orbitals are reduced to hairs. Small inner

verticals and a pair on the frons just beyond the front ocellus. The most striking

difference between Mosillus and Enchastes is best seen on a front view (PI. 15, fig. 22).

In Mosillus the sutures extending from the ends of the lunule each side and separating

the face from the cheeks are very nearly parallel; the eyes are round ; hence the cheeks

widen greatly from the antennal level downwards. In the present genus these sutures

diverge somewhat ; the eyes are long-oval and hence the cheeks are much more nearly

of constant breadth from the antennal level downwards.

The face is protuberant and has a large oblong shining knob: the four facial bristles

stand on extremely minute hillocks. The prelabrum is very protuberant and is rect-

angular or spade-like in profile.

Thorax and scutellum, dorsum with the surface minutely granulate and covered

with short bristly hairs instead of the fine hairs of Mosillus. The last pair of dorso-

central bristles, a single notopleural bristle just before the wing base, two mesopleural

which are not very strong, two scutellars crossed at the tip. The scutellum is rounded

at the tip. Wings and legs much as in Mosi/lus.

Type, the following species.

SECOND SERIES—ZOOLOGY, VOL. XV. 4]

320 PERCY SLADEN TRUST EXPEDITION

20. Enchastes scotti, n. sp. (Pl. 15, fig. 21).

Head (Pl. 15, fig. 22), Form etc. as described and figured for the genus; frons dull

dark grey, a frontal triangle is demarcated by two rows of tiny bristles. Eye-margins

narrow and more silvery.

Antennze orange red.

Face shining grey with four bristles each side pointing to the centre line and a few

other scattered ones; facial knob extremely shining. Jowls and back of head rather

silvery. Prelabrum horny, shining ‘with silvery sides and central spot ; tongue coriace-

ous, the palpi are hidden.

Thorax and scutellum blackish with a fine faintly greenish granulation and black

bristles.

Wings with venation as figured with third and fourth veins convergent at the end ;

veins pale.

Halters orange.

Legs: femora and tibiz dark black-grey with orange knees and tarsi except the last

joint. The middle femora with stronger bristles in front.

Abdomen shining black-grey slightly suffused with reddish at the base; second,

third and fourth segments increasing progressively in breadth, fifth pointed, pollinated

and more hairy than the others.

Size. Just under 3 mm.

Locality. Seychelles. Mahé: from seaweed on beach at Anonyme Island, I. 1909.

Discomyza, Meigen.

Discomyza Meigen, System. Beschr., vi. (1830), p. 76.

21. Discomyza similis, n. sp.

This species is allied to the Palearctic D. incwrva Meigen, from which it differs in

many points but most markedly in the breadth relative to the length. It is about as

long as D. mecurva but is proportionately more slender than that insect; the ratio of

maximum thoracic breadth to length measured from the scutellar junction to the front

margin is slightly greater than 14 in D. incurva, while in the new species the ratio is

about unity: this ratio holds approximately also for the head and abdomen.

The following description is based principally on the differences between D. similis

and D. incurva.

Head. The frontal triangle is proportionately larger and is somewhat wrinkled or

rugose instead of being flat and shining. The face is similarly knobbed on each side

below the antennz, but just below these there are from six to eight small circular pits

instead of a shining triangle. Antenna black, the third joint slightly suffused with grey

instead of the second joint being extensively bright red, the arista is six-rayed: the

cheetotaxy is the same, but the bristles are longer and less stout. Correlated with the

greater ratio of length to breadth the face is more rounded in outline.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 321

Thorax slightly greyer in tone with the scutellum more pointed, and not abruptly

cut across.

Wings, as Fig. 10, with blackened costa.

Halters pale yellow.

Legs the same, front pair all black, middle and hind black except for the bright red

first to fourth joints to the tarsi.

Size. Most specimens are from 3 to 34mm., but one measures only 21 mm.

Localities. Seychelles. Mahé: from marsh just behind beach at Port Glaud, 5. XI.

1908; Anonyme Island, I. 1909; marshy ground near sea-level at Cascade, 20. II. 1909 ;

marshes on coastal plain, Anse aux Pins and Anse Royale, I. 1909.

InyrHea, Haliday.

Ilythea Haliday, Ann. Mag. Nat. Hist., ser. 1, iii. (1839), p. 408.

Two species of this interesting genus were collected, but unfortunately the specimens

were not in first-rate condition so that very full descriptions cannot be given.

Fig. 10. Discomyza similis, n. sp., wing. Fig. 11. Llythea fractivirgata, n. sp., wing.

22. Ilythea fractivirgata, n. sp.

Head. Profile very like I. spilota Curtis, except that the back of the head behind and

below the eyes is not quite so swollen. Chetotaxy the same but the bristles less strong.

Antenne similar, but the third joint slightly smaller and the five aristal rays propor-

tionately longer. In top view the head is not quite so flattened, and in front view the

shining elongate central knob does not extend so far down to the mouth-margin.

The frons is shining, while the face, jowls and lower eye-margins are dusted with

grey. The palpi are long, thin and pale with a few bristles near the end; tongue yellow

with a bent-back tip.

Thorax. Dorsum and scutellum shining blue-black, slightly dusted: as far as can

be seen the cheetotaxy is normal, but the bristles are again proportionately weaker.

Wings as in Fig. 11, with remarkable interrupted blackish transverse bands, three in

number.

Halters yellow.

Legs all yellow.

4]—-2

322 PERCY SLADEN TRUST EXPEDITION

Abdomen black and shining, otherwise like that of /. spzlota.

Sie. 14mm.

Locality. Seychelles. Mahé: from marshy ground near sea-level at Cascade, 20.

eal 093

23. Ilythea invenata, n. sp.

This species is very close to the last as regards its main characters. The characters

of head, thorax, ete. are practically the same, the principal difference being the reddish

colour of the facial dusting, the longer scutellar bristles, the more orange-yellow legs with

the front coxee nearly black.

Wings (Fig. 12). These offer a very striking peculiarity inasmuch as the cross veins

are absent: the picture on the wings is more like that of the typical species.

Four specimens of this new species are in the Cambridge Collection and were sent by

Mr F. Muir from Durban.

Size about 14 mm.

Locality. Seychelles. Mahé: marshes on coastal plain, Anse aux Pins and Anse

Royale, I. 1909.

Fig. 12. Ilythea invenata, n. sp., wing. Fig. 13. Psilopa nitidissima, n. sp., wing.

Psttopa, Fallén.

Psilopa Fallén, Dipt. Suec., Hydromyz., (1823), p. 7.

24. Psilopa nitidissima, n. sp.

This species is very closely related to the Palearctic species P. compta Meigen ;

it is however much more shining, being brilliant green with coppery or purplish reflections

instead of pure green. In the description given comparison is made with P. compta.

Head similar in form, cheetotaxy etc. including the antenn, except for bemg

brilliantly shining.

Thorax. Similar; scutellum more swollen at the sides, the flattened part of dise

smaller, and the whole somewhat smaller in proportion and more rounded in outline.

Wings (Fig. 13) differ in that the second vein is shorter.

Legs ; differ in that the tibize are all blackened in the middle.

Abdomen, very shining, the distal part is red-coppery in colour.

Size. 2mm.

Locality. Seychelles. Mahé: from marshes on coastal plain, Anse aux Pins and

Anse Royale, I. 1909.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA®, EPHYDRIDA, ETC. 323

25. Psilopa longicornis, n. sp.

This species is rather aberrant in the genus, but seems best placed there. It is an

elongate form with an exceptionally long third antennal joint. Most of the specimens

were rather worn, so that slight uncertainty arises in regard to the colours.

Head (Pl. 15, fig. 16). Frons and vertex greenish brassy with grey pollination, the

broad eye-margins more brassy but not truly shining: a well-marked straight lunular

suture crosses the frons just above the antenna and extends from one eye-margin to the

other. Below this the face is pollinated like the frons. The pollination is frequently rubbed

off, when the ground colour beneath is seen to be reddish bronze. Jowls silvery; prelabrum

often showing slightly, shiny, and horny in texture. Inside of mouth and the palpi

yellow; tongue stout and yellowish grey.

The usual pair of fronto-orbital bristles inserted side by side, strong, the inner

pointing backwards the outer forwards; inner and outer verticals; very long ocellars ;

stout vibrissee, and the usual stout long bristle on the hind head just below the back of

the eye.

Antenne blackish with yellow tone, the basal joints being somewhat silvery; the

curved bristle on the second joint is fairly long but fine; third joint very long, arista

long pectinate with eight side rays and one terminal.

Fig. 14. Psilopa longicornis, n. sp., wing,

Thorax. Shining greenish with grey pollination; a well-marked more brassy

central line, each side of this being well pollinated. The dusting is easily knocked off,

and many specimens were bare. One pair of dorso-central bristles, scutellum dusted like

the thorax, a pair of terminal bristles and the usual pair near the base are especially long

and stout.

Wings (Fig. 14); veins yellow.

Halters, knob whitish and stalk yellow.

Legs yellow with very slightly darkened femora.

Abdomen, dark greenish black, slightly pollinated with the basal part of the dorsum

often yellowish in the centre; the whole is covered with stout bristly hairs, longer

on the margins of the segments.

Size about 2 mm.

Localities. Seychelles. Mahé: marsh just behind beach at Port Glaud, 5. XI.

1908; marshes on coastal plain, Anse aux Pins and Anse Royale, I. 1909.

324 PERCY SLADEN TRUST EXPEDITION

ALLoTRIcHOMA, Becker.

Allotrichoma Becker, Dipterolog. Studien, iv., Berlin. Ent. Zeitschr., xl. (1895), p. 121.

Some 14 specimens of an insect were collected which seems to be best placed in this

genus. The male agrees with Becker’s generic characters and possesses peculiar genitalia

like those figured by him (/.c., Plate IV, figs. 7, 8). The female is extremely like a Disco-

cerina and in both sexes the form and colour bear a strong resemblance to those of a

member of that genus.

26. Allotrichoma argentipretexta, n. sp.

Shining black like a Discocerina, covered with fine sparse golden pollination.

Head (Pl. 15, fig. 20). Vertex and frons shining black, no well-marked frontal

triangle, in good specimens the pollination is evident. Face rather silvery, with a well-

marked silvery line above the mouth extending round the lower eye-margin ; prelabrum

exserted, shining blackish.

Antenne black, arista thickened at the base with four side rays, shortening from the

base to the tip, and one terminal ray ; a well-marked bristle on the second joint.

Fig. 15. Allotrichoma argentipretexta, n. sp., wing.

Face with two well-marked side bristles; the usual chzetotaxy, backward and forward

orbital pair, ocellars, inner and outer verticals, strong forwardly directed post-verticals as

strong as the ocellars.

Thorax with fine achrostical and other similar fine bristles each side of them on the

dorsum. Scutellum rounded and slightly arched with four bristles.

Wings as Fig. 15 with dark veins. |

Halters white.

Legs dark brown with the first joints of the tarsi light brownish yellow, last joints

slightly suffused.

Abdomen ¢. Third segment about twice as long as the second; fourth pointed,

nearly as long as the previous two; fifth very tiny or drawn beneath. Hypopygium with

appendages shaped like small pale flattened strips of nearly uniform width, not spatulate

as shown in Becker's paper (i.c. Plate IV, fig. 7), two stout divergent hairs on the end

and a finer central hair, and a few various sized hairs along the side.

?. Five segments visible, each a little longer than the previous, the fourth greater

than third and third greater than second; rounded visible fifth segment, abdomen covered

with fine hairs.

i i

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 325

Size (excluding antennze) about 1} mm.

Localities. Seychelles. Silhouette: low coconut-planted country near the coast,

Pointe Etienne, 17. IX. 1908. Mahé: marshes on coastal plain, Anse aux Pins and Anse

Royale, I. 1909; near Morne Blanc, about 800 ft., X—XI. 1908; Cascade Estate, about

1000 ft., 1908—9 ; Anonyme Island, I. 1909.

Hydrelline.

HyprELuiA, Robineau-Desvoidy.

Hydrellia Robineau-Desvoidy, Essai sur les Myodaires, v. (1830), p. 790.

A single species of this genus was found which Mr J. E. Collin informs me belongs to

the griseola group.

27. Hydrellia varipes, n. sp.

A black insect with variegated legs.

Head. Frons, vertex and back of head black, rather shining, slightly brassy.

A bright silver lunule over the antennz. Face closely covered with shining brown-gold

pollination with four well-marked fine bristles bordering the eyes. Jowls small, grey as is

the lower back of the head, two bristles just below the back lower angle of the eye and

a few scattered ones behind it. Palpi yellow, antennze black with nine side rays and one

terminal.

Thorax, shining black with greenish tone : two pairs of dorso-centrals, the front pair

very near the cross suture, continued forward by a few small bristles. Achrostical bristles

in two rows, fine. Scutellum as thorax, flattened on the disc, two terminal and two

basal bristles with two fine side hairs between. Pleurze and metanotum grey.

Wings normal in venation with brown veins.

Halters, bright yellow knobs with somewhat darkened stalks.

Legs : front, coxze yellow but slightly darkened at the base in front; trochanters

yellow; femora black with extreme tips (at each end) yellow ; metatarsus yellowish, other

tarsal joints black but just perceptibly spotted with yellow at the extreme distal tip.

Other legs as front but coxee and trochanters slightly suffused and the hind metatarsi

brighter yellow.

Abdomen; black, less shining than thorax, bristly, the marginal bristles being

especially distinct ; segments of nearly equal length.

Size about 132 mm.

Localities. Seychelles. Mahé: marshes on coastal plain, Anse aux Pins and Anse

Royale, I. 1909; cultivated and marshy country near sea-level at Cascade, 20. II. 1909 ;

cultivated country about 1000 ft., XI—XII. 1908; near Morne Blane, about 800 ft.,

X—XI. 1908.

326 PERCY SLADEN TRUST EXPEDITION

Puityerta, Stenhammar.

Philygria Stenhammar, Ephydr., (1844), p. 238.

28. Philygria striata, n. sp.

A single specimen was captured which is superficially much like a small P. picta

Fall., with which the species is compared in the description. It has the same two silver

thoracic stripes and silvery eye-margins.

The differences are as follows :

Head. The third joint is much smaller, pointed, a little longer than broad, slightly

hairy at the top ; the aristal rays are much finer and less regular and pale instead of black ;

the first two-fifths of the arista is very thick and then suddenly thins out for the

remainder. The mouth is less prominent; the lower eye-margins are proportionately a

little wider. Two vertical bristles and the ocellars present but finer.

Thorax. The silvery stripes are a little wider, and the dorsum of the scutellum is

the same colour as the dise of the thorax, not deep dull black : the silvery side spots to

the scutellum are present.

Wings; the second vein is longer and all the veins thinner and paler.

Halters like picta with long whitish heads.

Legs entirely pale yellow with no infuscation.

Abdomen the same, but the anal half is not quite so shiny and the third segment

bears two small dusty spots.

Size. 1mm.

Locality. Seychelles. Mahé: marshes on coastal plain, Anse aux Pins and Anse

Royale, I. 1909.

29. Philygria sp.

There are two imperfect specimens gummed on card which belong to the picta group.

It is impossible to give any description owing to the condition of the specimens.

Locality. Seychelles. Mahé: marshes on coastal plain, Anse aux Pins and Anse

Royale, I. 1909.

Ephydrine.

Parypra, Stenhammar.

Parydra Stenhammar, Ephydr., (1844), p. 144.

The single species of this genus is somewhat aberrant in that it has a pointed

antenna and teeth on the front femora; in appearance it is nearer to P. pusilla Meig.,

than to the other more normal members of the genus.

30. Parydra tuberculifera, n. sp.

Head (Pl. 15, fig. 18). Frons, vertex and back of head shining black obscured with

yellow pollination on the back, slightly so on the eye-margin and above the antennz. In

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 327

top view the head is mainly of excessively shining black which forms an area bounded

forwardly by the pollination over the antenne and sideways by the eye-margins, but

extending in a triangular shape from the vertex almost down to the neck where the

boundaries are formed by two elongate excessively pollinated patches. The ocelli are

nearly in the centre of this shining area. The face and jowls are also shining black with

a neatly distributed sparse white pollination; in front view this invades the frons above

the antenne. Hind head swollen as are the eye-margins except just at the centre of the

hind margin of the orbits. The sides of the head behind are also well pollinated. Tongue

with dark grey chitinous basal part clothed below with fine white silky hairs, the distal

part horny, the tip with a few small teeth. Palpi linear, yellow. Antenne black, the

arista thick for the first two-fifths, of the next portion the proximal half is finely

pubescent on the top and the distal half is bare; third jomt oval with a remarkable

pointed tip.

Cheetotaxy normal; two fronto-orbital bristles, ocellars, inner and outer verticals ;

a fine but long bristle projects from each side of the facial eye-orbit and is succeeded by

side rows of eight to ten fine hairs along the lower eye-margins ; the projecting prelabrum

is the same colour as the face.

Fig. 16. Parydra tuberculifera, n. sp., wing.

Thorax and scutellum shining black with a very neat sparse yellow pollen, two

shining patches over the wings and each side of the base of the scutellum. One pair

of dorso-central bristles, other bristles normal but the achrosticals very fine and indistinct ;

pleura grey owing to pollination.

Wings as Fig. 16, finely ciliated all round the margin, thicker on the first costal

segment; veins brown; no paler or transparent “‘ windows” or patches present.

Halters orange.

Legs bright orange yellow, except the last tarsal joints which are black and finely

haired, the hairs being stronger on the hind tarsi and on the last joint of the other tarsi.

Front femora with a row of tubercles starting at the centre (Pl. 15, fig. 17), where the

femur is thickened, and forming a row of blunt saw-teeth from there up to the insertion

of the tibia ; between the tubercles are fine hairs ; middle femora ciliated below.

Abdomen. Shining black with sparse pollination; the margins of the segments

paler, yellowish and less shining.

Size about 2 mm.

Locality. Seychelles. Mahé: marshy ground near sea-level at Cascade, 20. II.

1909.

SECOND SERIES—ZOOLOGY, VOL. XV. 42

328 PERCY SLADEN TRUST EXPEDITION

ScaTELLA, Robineau-Desvoidy.

Scatella Robineau-Desvoidy, Essai sur les Myodaires, iii. (1830), p. 801.

A single species occurs which is characterised by the seven distinct ‘‘ windows” on the

wing.

31. Scatella septemfenestrata, n. sp.

Head. Profile like S. stagnalis Fall., but the facial knob is somewhat more prominent.

Frons and vertex shining black dusted, two fronto-orbitals ; face dusted with grey pollen,

a strong bristle each side above the mouth margin. Back of head and jowls black with

grey pollen, a strong bristle on the jowl below the eye. Antennze black.

Thorax densely covered with red-brown pollen; when rubbed the ground is seen to

be shining black. Scutellum with two terminal bristles and two side hairs.

Wings as Fig. 17, tinted brownish with seven windows which appear as whitish

patches on side illumination, two are between the second and third veins, the distal one

being the fainter, three between the third and fourth veins, the distal one being the

fainter, the two others lie one each side the cross vein between fourth and fifth. None

of these spots are very large nor do they appear to push the veins apart.

Halters pale whitish yellow.

Legs entirely black.

Fig. 17. Scatella septemfenestrata, n. sp., wing.

Abdomen. Like the thorax with equal segments.

Size about 13 mm.

Locality. Seychelles. Mahé: from marsh just behind beach at Port Glaud, 5. XI.

1908.

Canace, Haliday.

Canace Haliday, Ann. Mag. Nat. Hist., ser. 1, iii. (1839), p. 411.

One specimen of a new species of this interesting genus was collected on the sea-

shore of Mahé. It differs considerably from either of the two European species, being

nearer to C. nasica Hal. than to C. ranula.

32. Canace mahensis, n. sp. (Pl. 15, fig. 19).

The insect is of a uniformly dark grey colour, more silvery on the pleure and legs

and with a silvery face and labrum.

¢. Head. In profile longer than high, while in C. nasica it is the other way, this

is partly due to the smaller jowls. There is a well-marked depressed frontal triangle

and a large facial knob just touching the base of the antenne. Eyes longish oval, with

the major axis nearly horizontal, small.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 329

The bristles are as follows: three stout outwardly overhanging fronto-orbital bristles,

inner converging verticals and outer somewhat finer verticals, no true post-verticals; an

ocellar pair midway between each basal ocellus and the front one; another pair of bristles in

front of these, each about midway between the true ocellar bristles and the forward fronto-

orbital bristles. The ocelli are unusually wide apart and form an equilateral triangle.

The silvery jowl bears three bristles about equally spaced, the lowest is below about

the middle of the eye and half-way down the jowl, and points downwards and forwards,

the other hind two point somewhat upwards; on viewing the face in profile the fronto-

orbital and jowl bristles converge towards one another to form a sort of cage to protect

the eyes. The facial bristle of C. naseca is absent. The antennz are much as in that

species, black, with a faintly pubescent arista.

The silvery labrum is visible; tongue large and fleshy.

Thorax. The chextotaxy is as in C. nasica, but the four dorso-central bristles and

the marginal bristles are proportionately longer and more striking. Otherwise the

dorsum is absolutely bare and smooth, contrasting with the bristly dorsum of C. naszca.

The scutellum has four bristles, the terminal ones directed upwards, the two basal

ones backwards, but it lacks the small dorsal pairs. The pleural bristles are destroyed

by the pinning of the specimen.

Wings and halters as C. nasiea.

Legs: front femora have a row of five fine long bristles, and the middle and hind

femora are slightly spiny in front; hind femora in no way thickened.

Abdomen. Narrow and long but segmented as in C. nasica; two processes on the

dorsal side for holding the egg as shown in the figure. The preceding segment has the

pair of long bristles.

Size about 17 mm.

Locality. Seychelles. Mahé: from seaweed on beach at Long Island, VII. 1908.

A second badly preserved specimen is among some material from Coetivy.

Chloropidae. Chloropinae.

Ops, Becker.*

Ops Becker, Ann. Mus. Nat. Hung., viii. (1910), p. 402.

33. Ops glaberrima, n. sp. (Pl. 16, figs. 1—4).

g, ¢. This species must be near Chloropisca callichroma Loéw from Africa, but

differs therefrom in several essential points.

Head (Pl. 16, figs. 1, 2). The frons and face are of equal width, the eye-margins

being parallel and equidistant from the vertex to the mouth. The vertex and frons are

bright yellow with a small black shining vertical spot. The vertical “triangle” (Pl. 16,

fig. 2) is very shining and extends from the vertex (where it nearly fills the space from

* This name is preoccupied in the Lycaenidae; see de Nicéville, Journ. Bombay Nat. Hist. Soc., vol. ix.

1895, p. 296.

42—2

330 PERCY SLADEN TRUST EXPEDITION

eye to eye) to close up to the base of the antennze: the front edge terminates in a

slightly curved line which covers one-third of the frontal breadth; the side margins are

slightly concave.

Note. When the specimen is shrivelled the shape of the frons ete. has a somewhat

different appearance: the central strip of the frons is more strongly chitinized than the

spaces between it and the eyes; on drying this central strip falls in and drags the side

strips down with it so that the frons appears to be deeply furrowed; the bottom of

the furrow being the central strip, the side strips now form roughly perpendicular

boundaries of the furrow. When this occurs the eye-margins no longer appear parallel

throughout.

The face is yellow slightly dusted with silver, with two very shallow antennal fovez:

the mouth opening when viewed perpendicularly to its plane is trapezoidal in outline;

the upper lip is pale, the sides of the mouth edge are margined with a fine brown line;

palpi and tongue reddish brown.

Antenne reddish yellow with a brown slightly pubescent arista.

Back of head black with a broad yellow margin all round; jowls very small.

Thorax (PI. 16, fig. 3). Dorsum shining black with a somewhat irregular contour,

having a nick at the cross suture, and a slightly wavy and less sharply defined hind

margin. The black central part is bordered with bright yellow; pleura yellow with

a reddish linear spot just behind the cross suture and an elongated black spot on the same.

Fig. 18. Ops glaberrima, n. sp., wing.

Scutellum in the form of a nearly equilateral triangle with rounded angles: very

flattened on the dorsum; a pair of short black converging terminal bristles; metanotum

shining’ black.

Wings (Fig. 18): venation normal, the distal part of the fourth vein being much less

distinct than the other veins; extreme base of costa blackish and slightly swollen.

Halters with bright canary yellow knobs, stalks blackened beneath.

Legs pale yellow including the tarsi, which have minute black claws.

Abdomen. First and second segments reddish yellow, the latter with the usual two

tiny black spots on the extreme margin, sides paler. The third shining black including

the sides to the belly. Fourth yellowish with a broad black stripe interrupted in the

centre, the breadth of stripe and interruption varying somewhat in different specimens.

Fifth yellow with two elongate black basal side spots, the remainder being pale yellow.

Size. 2 to 24mm.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 331

Localities. Seychelles. Mahé: Cascade Estate, about 800 ft., 1909; near Morne

Blanc, X.—XI. 1908; swept from rank vegetation in marshes on coastal plain at Anse

Royale, I. 1909.

Var. dentata, n. var. A pale variety (or sub-species) occurs in which the thoracic

black dorsal mark extends less far behind and appears like a central mark with two

backwardly directed side lobes (Pl. 16, fig. 4). The abdomen is wholly devoid of black

marks, the basal part being reddish yellow, the rest pale yellow.

Localities. Seychelles. Mahé: Cascade Estate, about 800 ft., 1909; marshes on

coastal plain, Anse Royale, I. 1909.

Oscinine.

GAMPSOCERA, Schiner.

Gampsocera Schiner, Wien. Ent. Monatschr., vi. (1862), p. 431.

A single specimen of an insect was obtained which seems best placed in this genus.

The specimen agrees with Schiner’s generic characters with the exception of the shape

of the scutellum: Schiner’s description says, ‘“ Riickenschild flach gewélbt, am Rande

beborstet, Schildchen verhiltnissmiissig klein.” Becker (Archivum Zoologicum, Vol. i.

no. 10, p. 117) defines the genus and figures the head of G. scutellata Heeger; he describes

the scutellum as “halbkreisformig.” The present specimen agrees with his figure as to

the shape of the head and antennz, but the scutellum is elongate as shown in Pl. 16,

fig. 5. In other respects the agreement with the published generic character is close.

34. Gampsocera scutellata, n. sp.

g. Head. The shape is very like Becker’s figure (/.c. Plate III, fig. 68) but the

hairy eyes are not rounded at the lower inner edge, the margin being there angulated.

Frons black ; the triangle large, shining black, the base nearly filling the space between

the eyes; it extends to the base of the antenne. The antennz have the third joimt less

pointed than in Becker’s figure (/.c. Plate III, fig. 69), being more nearly kidney-shaped :

the second and third joints are yellow. The black apical arista is flattened in section and

very densely pilose, its two joints being quite distinct, the last ends in a distinct though

fine terminal bristle. The proboscis and palpi of the single specimen are completely

retracted.

Thorax (Pl. 16, fig. 5). Shining black on the dorsum and pleure. The former is

finely punctate and clothed with delicate white hairs; there are no dorsal bristles. The

scutellum has a blunt-pointed triangular outline (PI. 16, fig. 5) and is strongly arched

and more coarsely punctate than the thorax. It is black with two strong divergent

terminal bristles: the dorsum and sides have small white bristly hairs.

Wings immaculate, yellow at their insertion; the venation is as figured by Becker

(l.c. Plate III, fig. 70), except that the second vein bends more sharply up to the costa

which it meets about midway between the ends of the first and third veins.

Halters yellow,

Legs entirely pale yellow.

332 PERCY SLADEN TRUST EXPEDITION

Abdomen. Basal part orange-yellow, the rest (including the venter) shining black.

Size. 14mm. exclusive of antenne.

Locality. Seychelles. Mahé: marshes on coastal plain, Anse aux Pins and Anse

Royale, I. 1909.

ANATRICHUS, Loew.

Anatrichus Loéw, Ofvers. Kongl. Vet. Akad. Forhandl., xvii. Dipt. (1860), p. 97.

35. Anatrichus arenaceus Loéw, l.c. 97. 13.

This insect has a wide distribution in Africa ; it is known from South Africa, Egypt,

the Chirinda forest, etc.

Locality. Seychelles. Mahé: the collection contains six specimens from the marshes

on the coastal plains of Anse aux Pins and Anse Royale, I. 1909.

Meroscrnis, De Meijere.

Meroscinis De Meijere, Tijdschr. voor Entom., li. (1908), p. 172, Pl. 4, fig. 14.

This genus was established by De Meijere for a Chloropid from Semarang, Batavia.

Becker records two species from Africa in the Ann. Nat. Mus. Hung. (1910). There are

two species from the Seychelles which can be referred to this genus.

36. Meroscinis eneifrons, n. sp.

The colour is uniformly shining black except that the first two or three tarsal joints

are bright yellow and that the third antennal joint is very slightly rufous, especially on

the inner side.

Head (Pl. 16, figs. 6, 7). The vertical triangle is large, shining metallic blue; it

extends to the front antennal margin where it is abruptly cut off (Pl. 16, fig. 7). The

fronto-orbital bristles are strongly developed, and there is an inner row of strong bristles

bordering the shining vertical triangle. The former are slightly bent backwards, the

latter forwards and arching inwards towards one another. The post-ocellar pair are

crossed ; the outer vertical pair strongly developed. The mouth-margin is bristled.

Antenne with an orbicular third joint with a strongly pubescent brownish-black

arista.

Eyes bare.

Tongue and palpi black.

Thorax. Shining black, finely punctate and covered with short pale hairs: the

single post-alar bristle is fairly strong, the others very small or absent. Pleura shining

black and slightly rugose. Scutellum shining greenish-black, more densely punctate than

the thorax, the punctation being coarser : it is also covered with pale silky hairs ; two long

terminal bristles, much divergent and about as long as the scutellum.

Wings with venation as shown in Fig. 19: glassy with black veins.

Halters with black heads but yellowish stalks.

———

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 333

Legs black except for very indistinctly paler knees, the first two joints of the

front tarsi and the first three joints of the middle and hind tarsi which are yellow.

Abdomen. Entirely shining black with black hairs.

Size. 2 to 24mm.

Localities. Seychelles. Silhouette: Mare aux Cochons, plateau and forest above,

VIII.— IX. 1908. Mahé: Cascade Estate, about 1000 feet, 1908—9.

37. Meroscinis rugosa, n. sp.

This differs from the last species as follows :

Head (Pl. 16, fig. 8). The shining triangle is not so strongly blue and is pointed

at the end. The antennal joints are bright yellow-red with the arista paler and finely

pubescent.

Thorax. The punctation of both thorax and scutellum is coarser, that of the latter

being unusually coarse: the scutellum has a purplish tone of colour and a blunter tip ;

there are four scutellar bristles, the terminal pair being situated on small but noticeable

papillee, the two smaller side ones being also on papillee which are, however, smaller.

Fig. 19. Meroscinis eneifrons, n. sp., wing.

Wings with pale veins.

All the legs have yellow trochanters, black femora with yellow knees, yellow tibiz

with a broad black or blackish ring round the middle, and entirely yellow tarsi.

Size as last species.

Localities. Seychelles. Mahé: Cascade Estate, about 1000 feet; marshes on

coastal plain, Anse aux Pins and Anse Royale, I. 1909.

HipreLates, Loew.

Mippelates Loew, Berlin. Ent. Zeitschr., vii. (1863), p. 36.

This genus was founded by Loéw for certain American forms. Becker has described

one from Madeira (Archiv. Zool., i. 150), and De Meijere one from Java. Five species

occur in the Seychelles, one of which agrees with a published description.

38. LHippelates nigricornis Thomson, Eugenies Resa, p. 607.

Described from Ins. Rossi.

Locality. Seychelles. Mahé: Anonyme Island, I. 1909.

334 PERCY SLADEN TRUST EXPEDITION

39. LHippelates stigmatica, n. sp.

This is the smallest of the five species and must be nearly related to H. minor

De Meijere (Tijd. voor Entom. li. 168). The latter has black thoracic stripes and

entirely yellow legs, while the present species has brownish stripes and the whole of

the front tarsi and last joints of mid and hind tarsi black. It possesses the pleural spot

of H. minor.

49. Head. Entirely yellow except for a round black spot on which the ocelli

stand ; the frontal triangle is concolorous with the rest of the frons but is much more

shining, its base almost fills up the space between the eyes and its point extends to about

halfway between the vertex and the antennal bases. Antennze yellow with a slightly

pubescent black arista. Orbital bristles (1+3), inner and outer verticals, crossed post-

verticals ; a row of bristles along each side of the frontal triangle directed forward and

inward ; small vibrissee present. Jowls about one-fourth depth of eye. Tongue and palpi

yellow.

Thorax. Yellow-brown; in well-marked specimens there are four longitudinal

stripes of darker brown which do not meet either the front or the hind borders of the

dorsum ; these lines vary somewhat in breadth and in some cases are confluent, especially

Fig. 20. Hippelates stigmatica, n. sp., wing. Fig. 21. Hippelates longiseta, n. sp., wing.

in the case of the central pair. The last pair of dorso-central bristles are present, but the

bristles are easily damaged. Pleura with a shining black spot. Scutellum pale yellow

with two terminal and a few side and discal bristles. _Metanotum shining black.

Wings, as in Fig. 20, hairy with yellow veins.

Halters pale whitish-yellow with yellow stalks.

Legs yellow with darkened tip to tibiz and darkened tarsi in first pair; last two

joints of tarsi black in other pairs, the tibial spurs of the hind legs are small.

Abdomen. Brownish-yellow: the ovipositor shining black.

Size. About 12mm.

Localities. Seychelles. Mahé: from near Morne Blanc, about 800 feet, X.—XI.

1908; Port Victoria, XII. 1908; marshes on coastal plain, Anse aux Pins and Anse

Royale, I. 1909; Anonyme Island, I. 1909.

40. Hippelates longiseta, n. sp.

This is a very interesting form in which the tibial spurs are greatly developed, and

the male possesses a pair of very long fine bristles on the tongue. All the bristles on the

insect are pale.

— ene

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 335

4,9. Head (Pl. 16, fig. 9). Yellow with a small black ocellar dot; frontal triangle

pale shining yellow with its base nearly reaching from eye to eye and its point extending

very nearly to the antennze; face, palpi and tongue yellow. Eyes slightly pubescent.

Fronto-orbital bristles (1+ 3), outer and inner verticals the former divergent, crossed post-

verticals, strongly crossed ocellars, a row of fine inwardly convergent bristles parallel to

but slightly removed from the sides of the frontal triangle. Antenne pale with a large

third joint, a brown pubescent arista, and a strong bristle on the top edge of the second

joint.

Tongue yellow: in the male it possesses a pair of long fine pale setz: as shown in

fig. 9, the female is devoid of these sete.

Palpi yellow.

Thorax. Dorsum yellowish red: in some cases a pair of brownish red lines run

from the last pair of dorso-central bristles (the only pair present) to just behind the

humeral calli; these lines vary in intensity in different specimens. The dorsum is covered

with pale hairs. Pleura pale yellow; when the insect is viewed perpendicular to its

dorsal plane the pleural bristles stand out as long though fine. Sceutellum flattened, pale

yellow, covered with hairs; four scutellar bristles the end ones long and crossed at the

tip.

Wings as Fig. 21; veins pale.

Halters yellow.

Legs all pale yellow. The hind pair are long and the terminal tibial spur is very

black and long, being nearly equal in length to the metatarsus.

Abdomen yellow.

Size. 24 mm.

Localities. Seychelles. Mahé: Cascade Estate, about 1000 ft., 1908—9 ; Anonyme

Island, I. 1909. Amirantes: Eagle Island, 17. X. 1905. Cargados Islands: Establishment

Island, 28. VIIT. 1905.

41. Hippelates nigrescens, n. sp.

This species is similar to the last in form, venation, ete. ; it differs as follows :

All the bristles are black.

Head. Blackish brown, yellow just above the antenne. Antenne nearly black.

Lower eye-margins silvery. Frontal triangle black and shining, reaching to about

two-thirds way down to the antenns. Eyes very hairy. Tongue devoid of sete in the

male.

Thorax with dorsum dark brown, the scutellum yellow. Wings with pale veins.

Legs similar to last species but slightly stouter, also with large tibial spurs.

Abdomen black.

Size. 24 mm.

Locality. Seychelles. Mahé: scrubby forest vegetation on summit of Mount Sebert,

1800 ft. or more, I. 1909.

SECOND SERIES—ZOOLOGY, VOL. XV. 43

336 PERCY SLADEN TRUST EXPEDITION

42. Huippelates femorata, n. sp.

A single specimen labelled “ Astove 1907 (H. P. Thomasset)” differs considerably

from the above; it has distinctly incrassated hind femora. The specimen is gummed on a

card and hence cannot be fully described ; it is so distinct that no difficulty should arise

in identification.

?. Head. Frons yellow with black shining triangle; hind head completely black

but interrupted on the line of the vertex by two yellow spots one each side of the ocelli.

Bristles as in H. longiseta, but the crossed post-vertical pair are exceptionally strong.

Hyes bare.

Antenne brownish but no detail can be given as they are buried in the gum.

Thorax. Dorsum black with the central part yellowish the yellow part extending

from about the cross suture to the scutellum. The humeri are swollen and yellow

with a small brown dot in the centre of each. Pleura yellow. Scutellum black, flattened,

punctate, with two long convergent black terminal bristles.

Wing very like Fig. 21.

Halters yellow.

Legs: front and middle yellow but the details are hidden by the gum; hind legs,

femora with proximal third yellow, distal two-thirds black, incrassated; tibiee, black

flattened broadening from each end, on the inner face about the middle is a pale grey spot

apparently covered with dust; the tibial spine is black and stout about as long as the

metatarsus ; the tarsi brownish black the joints being rather stout, especially the meta-

tarsus which is fringed inside with a close row of pale hairs.

Abdomen, black, yellowish at the base with narrow yellow margins to the segments.

Size. 24 mm.

Locality. Astove Island: 1907 (Thomasset).

GAuRAX, Loew.

Gaurax Loew, Berlin. Ent. Zeitschr., vil. (1863), p. 35.

A pair of specimens seem to be best placed in this genus. Loew in his definition of

the genus says

seta subterminali plumata.” The present insect agrees substantially

with his generic description except that the arista is distinctly dorsal. Zetterstedt’s

Oscinis ephippiwm is now considered to belong to this genus, though the arista can

scarcely be considered subterminal. Pending a revision of the species it appears best to

place the present insect in the genus.

43. Gaurax seychellensis, n. sp.

3,9. Head (Pl. 16, fig. 10). Vertex and frons brownish yellow, but pale yellow

from the tip of the frontal triangle to the antenne; frontal triangle dull black with its

base not extending to the eye-margins and with the front angle rounded and extending

nearly half way to the base of the antenne, the triangle is bordered each side by a row of

pale hairs.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDAM, EPHYDRIDA, ETC. 337

Face, palpi and tongue reddish yellow, the palpi being stout, fleshy and slightly

compressed laterally.

Eyes large, closely but finely haired.

Jowls silvery below the eyes then yellow. A row of fine fronto-orbital bristles

extending from the vertex to the antennz, outer vertical pair, post-verticals, parallel pair

of ocellars.

Antenne reddish yellow with a large circular discal third joint and black pubescent

arista which is inserted about the middle of the upper side of the third joint.

Thorax. Dorsum brownish black, shining, but obscured with slight pollination and

yellow pubescence. Humerus yellow; a yellowish spot each side of the base of the

scutellum. A small pair of prescutellar bristles. Scutellum rounded, yellow, hairy with

two terminal bristles and three marginal ones each side. Pleura shining yellowish with

shining blackish spots just above the middle coxa and the base of the wings. Metanotum

shining black.

Wings much as in Gaurax ephippium but proportionately broader, the third vein is

very slightly bowed instead of being straight.

Fig. 22. Siphuneulina signata Rond., wing.

Halters and their stalks pale yellow.

Legs pale yellow except for blackened tips to all the femora and a broad blackened

ring on the hind tibie.

Abdomen blackish brown, the basal part of the dorsal surface and the venter paler.

The female has a well developed soft ovipositor.

Size about 14 mm.

Localities. Seychelles. Silhouette: Mare aux Cochons, IX. 1908. Mahé: Cascade

Estate, about 1000 ft., 1909.

SipHuNCULINA, Rondani.

Stphunculina Rondani, Prodr., i. (1856), p. 128.

44, Siphunculina signata (Wollaston), Ann. Mag. Nat. Hist., ser. 3, i. (1858),

p. 117, Pl. V, fig. 8 [Oscenis |.

This insect was described and figured by Wollaston from Madeira. Specimens in

the collection agree well with this description and also with that of Becker in the Archiy.

Zool., i. (No. 10), p. 182.

The wing is figured (Fig. 22), as Wollaston’s figure is not very clear.

Locality. Cargados Islands: Establishment Island and Siren Island, 27—28. VIII.

1905.

43—2

338 PERCY SLADEN TRUST EXPEDITION

Notonavtax, Becker.

Notonaulax Becker, Mitt. Zool. Mus. Berlin, ii., p. 153.

45. Notonaulax trisulcata, n. sp.

3, ?. Head. Frons brownish black with a brown antennal margin; quite dull

except for a somewhat shining arched line from the ocelli to the eye-margins and an

abbreviated pointed mid-line down the small frontal triangle from the ocelli. Face, jowls

and palpi yellowish brown; mouth margin and tongue shining black. Eyes pubescent.

Antennze with the second joint concolorous with the margin of the frons, the third joint

much blackened, arista black and slightly pubescent.

Thorax. Dorsum shining blackish brown, finely haired, slightly dusted, with three

deep sulci; the central sulcus is punctate in one uniform row, the side sulci are more

widely punctate, the basal part having two rows of punctures side by side; these side

sulci increase in breadth from about the level of the cross suture. Pleura same colour as

dorsum. Scutellum triangular, slightly flattened, same colour as the thorax, with black hairs:

Fig. 23. Notonaulax trisulcata, n. sp., wing. Fig. 24. Oscinis dissimilicornis, n. sp., wing.

a deep cross groove demarcates it from the rest of the thorax; there are about three

short stout marginal bristles on each side, which gradually decrease in size towards the

base, and a crossed terminal pair.

Wings (Fig. 23) with dark brown veins.

Halters yellow.

Legs yellow with slightly infuscate hind femora; the hind tibiz have on the upper

side a peculiar dusty “brand” on the middle line like that mentioned in H. femorata;

it is situated on about the middle third.

Abdomen, either concolorous with the thorax or somewhat lighter at the base ; it is

clothed with fairly long hairs.

Size. 21 mm.

Localities. Seychelles. Silhouette: high forest, 2000 ft., VITI.—IX. 1908; Mare

aux Cochons and forest above, IX. 1908. Mahé: from near Morne Blane, about 800 ft.,

X.—XI. 1908; high forest of Morne Blane and Pilot, X.—XI. 1908; Morne Seychellois,

over 1500 ft., 4. Il. 1909; Mare aux Cochons district, 1500—2000 ft., I.—II. 1909;

Cascade Estate, about 1000 ft., 1909.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 309

Osctnis, Latreille.

Oscinis Latreille, Hist. Nat. Ins. et Crust., xiv. (1804), p. 385.

46. Oscinis dissimilicornis, n. sp.

This species has different coloured antennz in the two sexes. This occurs also in

O. dimorpha Osten-Sacken as described in “ Diptera from the Philippine Islands,” Berlin.

Ent. Zeitschr., xxvi. (1882), p. 245. The present species differs in several respects ; the

head is pale, the wings non-infuscate, the hind femora and tibize are black instead of

brown, the size is about 14 mm. instead of from 2} to 3. They must be somewhat

related forms.

g. Head. Frons yellow, dull; the frontal triangle is dull ereyish-black with a

broad base extending from eye to eye and a rounded front margin; it extends to about

one-third of the distance from the vertex to the base of the antenne. Three pairs of fine

upper fronto-orbital bristles, outer orbital bristles short but stout and slightly converging

post-verticals, parallel upright ocellars one each side of the front ocellus. The rounded

front margin of the frontal triangle has small bristles, and the frons is also provided with

small bristles. Face whitish with small vibrissxe; jowls pale yellow, a little less than

one-third the vertical height of the eye; posterior eye-margins grey; back of head

black.

Eyes oval, microscopically ( x 16) pubescent.

Antenne all yellow, arista black with slightly thickened basal joint, the rest being

very finely pubescent.

Tongue black and chitinous.

Palpi yellow.

Thorax and scutellum dullish black with greyish yellow pollination and very short

bristly hairs on the dorsum of both; the last dorso-central bristles present, two parallel

terminal scutellar bristles and two shorter side ones. Pleura same colour as thorax ;

metanotum shining black.

Wings (Fig. 24) in no way infuscate, veins brown.

Halters with a rather elongate whitish head and pale yellow stalk.

Legs: front with yellow cox, infuscate femora, the rest yellow; middle with

infuscate coxee and femora, the rest pale; hind also with infuscate coxze and femora, the

tibize generally infuscate basally.

Abdomen blackish, slightly shining and slightly paler at the base.

? differs in that the second and third antennal joints are black.

Size. 12mm.

Localities. Seychelles. Mahé: marsh just behind beach at Port Glaud, 5. XI. 1908;

marshes on coastal plain, Anse aux Pins and Anse Royale, I. 1909.

LIBRAR‘*

Sow

340 PERCY SLADEN TRUST EXPEDITION

47. Oscinis acuticornis, n. sp.

This is the smallest species ; it is entirely more or less shining black except for its

paler legs and yellow halters, and can be at once recognised from its small size and the

pointed tip to the large third antennal joint.

Head (Pl. 16, fig. 11). The frontal triangle is shiny black and practically covers the

whole frons from the vertex to the rounded front margin just above the antennz, leaving

only the eye-margins free. The face is deeply pitted between the eyes and below the

lunula, and the antenn are partly sunk in this pit. Below the pit the face is seen to

project when viewed in profile. Antenne black with a large hairy third joint ending in

a small spike which is partly formed by a terminal thorn; arista blackish, stout and

pubescent (x 45), second joint with a hair. Eyes microscopically pubescent.

The specimens are not in good condition but it is possible to see a fine fronto-orbital

row of bristles, crossed post-verticals and upright ocellars. Jowls about one-sixth of the

height of the eye.

Thorax sparsely clothed with fine bristles, the last pair of dorso-centrals present.

Scutellum slightly brassy with a rounded tip and two terminal bristles.

Wings (Fig. 25), veins dark brown.

Halters pale yellow.

Legs pale brown with darker femora.

——

Fig. 25. Oscinis acuticornis, n. sp., wing.

Abdomen duller black than thorax.

Size about 3 mm.

Locality. Seychelles. Mahé: marshy ground near sea-level at Cascade, 20. IL.

1909.

The following four species form a group of very similar species which are allied to

O. atricornis Zett., and differ from the normal forms of the genus in their more slender

shape. They are shining black in colour and with wings whose length is in general

unusually great relative to the body length. They are somewhat variable in colour of

the legs and in the relative breadth and length of the wings. This is noticeably the case

in the first species (O. oculata) in which specimens occur which are exactly similar in all

the important characters except that the wings (in the extreme cases) may vary between

the forms given in Figs. 26 and 27. It is possible that further knowledge of the habits

and food plants may enable the species to be more accurately subdivided.

48. Oscinis oculata, n. sp.

3, ¢. Head (Pl. 16, figs. 12, 13). Frons black with a large shining frontal triangle

(fig. 20), the base occupies very nearly the full space from eye to eye at the vertex, the

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 341

sides are slightly convex, and the rounded apex extends nearly to the base of the

antennze: two side triangles are thus formed between the eye-margins and the triangle

which are duller than the central triangle and slightly purplish in colour. Five fronto-

orbital bristles, one vertical, crossed post-verticals, parallel ocellars. The face below the

antenne and right up to the mouth margin is deeply recessed, the bottom of this pit or

recess is paler than the rest and is sometimes quite yellowish. The mouth margin and

hind head are shining black. The large sparsely pubescent eyes occupy nearly the whole

of the head in side view (PI. 16, fig. 12). The mouth margin is finely bristled, the

bristles being of nearly equal size. Tongue, black, horny with a backwardly bent

yellowish tip. Palpi black or blackish.

The antenne are black, the third joint large, orbicular and pubescent; arista

black and strongly pubescent.

Thorax. Very shining black with fairly long bristly hairs on the dorsum, bent

backwards, the last dorso-centrals present. Scutellum also shiny black with two end

bristles situated a little dorsally of the rounded margin. Metanotum black and very

shining.

Fig. 26. Oscinis oculata, n. sp., wing. Fig. 27. Oscinis oculata, n. sp., var., wing.

Wings: the normal form is as shown in Fig. 26, the axillary lobe beng well

developed and the wing of normal outline. The second vein is always gently bent up to

the costa, the third and fourth veins are quite parallel in their distal portions. In other

specimens (which are in other respects indistinguishable) the wings are different in form.

In some the wings are of the shape given in Fig. 26, but are proportionately shorter;

while the normal wing has its length about 2°4 times the maximum breadth, in the

present case the ratio falls below 2°3: this form has usually slightly darker legs than the

typical form. A more extreme form occurs in which the shape of the wing is altered,

as shown in Fig. 27: the axillary lobe is smaller, and the wing is more “bat” shaped; the

above ratio has here a value of 3 to 1. All the forms occur together, and are more

or less connected by intermediates. It is possible that the form figured in Fig. 27 is a

distinct species, although in other respects it is practically identical with the normal type.

The veins are brownish.

Halters pale.

The legs are also slightly variable in colour; in most cases they are yellow with

various degrees of infuscation. The commonest form is as follows: front legs (including

cox) yellow; middle legs, coxze black, femora very slightly infuscate on the distal half

342 PERCY SLADEN TRUST EXPEDITION

or two-thirds, tibiz and tarsi yellow; hind legs, coxee black, femora slightly infuscate,

tibiee with an infuscate ring, tarsi yellow. In some specimens the infuscation is con-

fined to the ring on the hind tibize, and more rarely the legs are entirely yellow.

Abdomen. Shining black, sometimes paler at the base; venter pale.

Sie. 12 to 2 mm.

Localities. Seychelles. Silhouette: high forest, 2000 ft.; near Mont Pot-a-eau,

about 1500 ft., VIII. 1908; Mare aux Cochons plateau and forest above, VIII.—IX. 1908;

low coconut-planted country near coast, Pointe Etienne, 17. IX. 1908. Mahé: near

Morne Blane, about 800 ft., X—XI. 1908; high forest of Morne Blane and Pilot, X= xk

1908; Cascade Estate, about 1000 ft., and forest above up to 2000 ft., 1908—9; Mare

aux Cochons district, 1500—2000 ft., I—II. 1909; Morne Seychellois, over 1500 ft.,

4. IJ. 1909. Praslin: Cotes d’Or Estate, X. 1908.

49. Oscinis longipennis, n. sp.

This species is like the European O. atricornis Zett.

Fig. 28. Oscinis longipennis, n. sp., wing.

3, 9. Head (PI. 16, figs. 14, 15). Frons dull rufous black with a very shining

frontal triangle which is less broad at the base than in the last species (Pl. 16, fig. 13)

and has a somewhat pointed apex which does not quite reach the antennz. Five fronto-

orbital bristles, two verticals each side, crossed post-verticals, convergent ocellars; the

frontal triangle with well marked bordering bristles. Face in profile more retreating

than in last species (fig. 23), with a long pit-like furrow in the centre which is yellowish at

the bottom. Mouth margin shining black with bordering bristles, the upper pair of which

are longer and form vibrissze, Hind head shining black, lower eye-margins dull. Tongue

and palpi blackish.

Eyes microscopically pubescent.

Antenne black, third joint orbicular, arista black and pubescent, second joint slightly

paler.

Thorax and scutellum as the last species.

Wings as Fig. 28: the second vein is straight almost to the end where it suddenly

turns up to the costa; the third and fourth veins slightly and continuously divergent.

The wings are exceptionally long and ample and extend far beyond the tip of the

body: they are slightly suffused with brown and have brown veins.

Halters yellow.

Legs entirely yellow except the middle and hind coxze and occasionally a slight

infuscation on the hind tibie.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 343

Abdomen. Black, sometimes a little paler at the base. 9 with a short fine ovi-

positor.

Size about 2 mm.

Localities. Seychelles. Silhouette: highest forest, 2000 ft.; near Mont Pot-a-eau, about

1500 ft., VIII. 1908; Mare aux Cochons and forest above, [X. 1908. Mahé: high forest

of Morne Blane and Pilot, X.—XI. 1908: Mare aux Cochons district, 1500—2000 ft.,

I.— II. 1909; Cascade Estate, about 1000 ft., 1908—9.

50. Oscins halterata, n. sp.

This species is similar in form of venation to O. longipennis: it is also entirely

shining black.

Head (PI. 16, figs. 16, 17). Somewhat as O. oculata but the jowls are just visible

in profile; they are grey in colour. The antennz are not deep black, but very dark

brownish or reddish black, and reddish on the inner faces.

Thorax. Scutellum and wings as in O. longipennis, but the cross veins are nearer

together and the wings are slightly shorter.

Halters black.

Legs yellow with all the femora and the middle and hind tibize slightly darkened.

Abdomen. Shorter and dark haired. ? with a long ovipositor.

Size about 14 mm.

Localities. Seychelles. Mahé: marshes on coastal plain, Anse aux Pins and Anse

Royale, I. 1909; Anonyme Island, I. 1909.

51. Oscinis varicornis, n. sp.

Two specimens can be referred to another species. In the characters of thorax, wings,

legs and abdomen it is like O. longipennis except that the wings are slightly shorter

in proportion and the halters are infuscate and not clear yellow. The chief differences

are in the head.

Head (Pl. 16, fig. 18). Side view as figured, well marked jowls being present and

the mouth margin slightly projecting. The frontal triangle is much as in O. longipeniis,

the eye-margins black and shiny; the facial pit is less deep and slightly wider.

The third joint of the antennz is red on the lower half and black on the upper, the

arista is perceptibly pale at the extreme base.

In other respects the insect is very like O. longipennis, but the legs are clear

orange yellow.

Size. 21 mm.

Localities. Seychelles. Mahé: country above Port Glaud, 500—800 ft., 5. XI. 1908;

marshes on coastal plain, Anse aux Pins and Anse Royale, I. 1909.

SECOND SERIES—ZOOLOGY, VOL. XV. 44

344 PERCY SLADEN TRUST EXPEDITION

Agromyzidae.

Acromyza, Fallén.

Agromyza Fallén, Dipt. Suec., Agromyz., iii, (1823), p.

52. Agromyza pubicornis, n. sp.

This species is one of the relatively longer and more parallel forms; in shape it

resembles a small A. capitata.

Head (Pl. 16, fig. 19). Frons dull yellow with a black somewhat shining ocellar

spot; the lunula is sunk into the frons leaving somewhat projecting yellow eye-margins,

it extends from the base of the antennz nearly half way back to the ocellar spot and

is grey in colour, the upper rounded edge being somewhat silvery. Face, tongue, palpi,

jowls and margins behind eyes yellow; back of head black; the jowls project somewhat

and there are well marked vibrisse.

Antenne; first two joimts yellow, the third greyish but yellow inside near the base,

second joint with a fine bristle; arista somewhat thickened especially at the base which is

yellow the rest being darkened, the pubescence is well marked, stout and close set.

Fig. 29. Agromyza pubscornis, n. sp., wing.

Four fronto-orbital bristles, lower two fine and pointing inwards, upper two stouter and

pointing outwards; stout inner verticals nearly parallel, finer outer verticals; ocellars

parallel and forwardly directed; post-verticals divergent.

Thorax. Dorsum and pleure slightly shining black (1+ 3), rather unequal dorso-

central bristles; achrostical bristles in four well marked rows. Scutellum black and

somewhat pointed with four long and nearly equal bristles, the terminal pair fairly close

together, the other pair near the base and somewhat remote from the margin.

Wings as Fig. 29, glassy with brown veins.

Halters bright yellow.

Legs yellow with slightly infuscate tibize and tarsi.

Abdomen somewhat shining black with approximately equal segments, covered

dorsally with short bristles.

Size. 14mm.

Localities. Seychelles. Mahé: marshy ground near sea-level at Cascade, 20. II.

1909; marshes on coastal plain, Anse aux Pins and Anse Royale, I. 1909.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 345

The following species are more rounded in form, resembling A. e@neiventris, Fallén.

53. Agromyza funebris, n. sp.

Two specimens were collected of this species which is entirely somewhat dull black

in colour.

Head (PI. 16, fig. 20). Frons dull brown black; a well marked frontal triangle, and

broad eye-margins separated from the rest of the frons by a browner space. The fronto-

orbital bristles stand on small shining spots. Face with the base of the antennz rather

sunk in, so that the first joint of the latter is hidden. Antenne black with a very

small thick third joint and pubescent arista. Jowls very narrow, mouth margin slightly

prominent; vibrissze small.

Four fronto-orbital bristles which do not converge, inner and outer verticals of about

the same length; parallel ocellars, divergent post-verticals.

Thorax. Subquadrate, apparently with only two dorso-central bristles and many

irregular achrostical bristles. Scutellum rounded in outline with four bristles.

Wings glassy with brown veins; the veins as in Fig. 30, where the basal part is

left out as it could not be properly seen.

Halters black.

Legs all black.

Fig. 30. Agromyza funebris, n. sp., wing.

Abdomen all black clothed with short bristles.

Size. 123 mm.

Localities. Seychelles. Silhouette: near Mont Pot-d-eau, about 1500 ft., VIII.

1908. Mahé: Cascade Estate, about 1000 ft.

54. Agromyza candidipennis, n. sp.

This is an entirely shining black insect with markedly milky wings.

Head (PI. 16, fig. 21). Vertex and frons entirely black, rather shining; the frontal

triangle more shining with its base about one-half the distance between the eyes, with

a pointed end, the sides slightly concave, it extends about two-thirds of the way from the

vertex to the boundary of the lunula. The lunula is roughly semicircular in outline.

Eye-margins shining like the frontal triangle. Face black, sunk in from the lunula to the

mouth-margin so that in profile the base of the antennz is hidden. Palpi short and stout,

somewhat swollen; tongue brownish.

Eyes large, bare.

Antennz black, second joint with a bristle; third joint rounded and rather small,

arista black and bare (x45). Fronto-orbital bristles four, equally spaced and somewhat

convergent; long inner’ and shorter outer verticals, ocellars, and divergent post-verticals.

44—2

346 PERCY SLADEN TRUST EXPEDITION

Thorax. Dorsum shining metallic greenish black; almost metallic green in a

bright light; entirely covered with fine bristles; the last dorso-centrals present. Scu-

tellum with four bristles, the terminal pair small and crossed. Pleura shining black

but reddish just below the wing insertion.

Wings as Fig. 31; milky white with white veins; the costa finely bordered with

a brown line.

Halters black.

Legs all black, femora with a well marked shallow groove below into which the

tibize can fit.

Abdomen. Dark greenish black; the last segment very long, about equal in length

to the previous three segments. The male has a globular hypopygium, the female a

stout blunt cylindrical ovipositor; the last segment of the female has a fringe of extra

long black hairs.

Size about 14 mm.

Localities. Seychelles. Silhouette: Mare aux Cochons, IX. 1908; low coconut-planted

country near coast, Pointe Etienne, 17. IX. 1908. Mahé: Port Victoria, XII. 1908.

Fig. 31. Agromyza candidipennis, n. sp., wing. Fig. 32. Agromyza similis, n. sp , wing.

55. Agromyza similis, n. sp.

This species is very closely allied to the Palearctic A. eneiventris Fallén.

Head. In general outline and chetotaxy much as the last species except that the

eyes are slightly less high in proportion to their breadth; the facial pit is also flatter at

the bottom. The arista is distinctly pubescent (x45). The lunula is not evident, being

sunk in with the rest of the face just above the antenne.

Thorax as last species.

Wings as Fig. 32: glassy with brown veins.

Halters and legs all black.

Abdomen. Greenish black with practically equal sized segments, ¢ hypopygium

and ? ovipositor far less conspicuous.

Size about 2 mm.

Localities. Seychelles. Silhouette: cultivated country; low coconut-planted country

near coast, Pointe Etienne, 17. [X. 1908; Mare aux Cochons and forest above, LX. 1908.

Mahé: from near Morne Blanc, about 800 ft., X.—XI. 1908; Cascade Estate, about

1000 ft.; marshy ground near sea-level at Cascade, 20. II. 1909.

LAMB—DIPTERA: LONCH AIDA, SAPROMYZIDA, EPHYDRIDA, ETC. 347

56. Agromyza sp. ?

A single specimen of another species is in the collection, but it is not in sufficiently

good condition to warrant a full description.

The insect is in form, size, etc. very close to the last species; but it is of a moderately

shining and of a true black colour, including halters and legs. The head is black and

very similar to the last species, but the third antennz joint is small and slightly pointed,

and the arista is bare and shorter than usual. The chetotaxy cannot be given owing to

the damaged condition. The wing venation is shown in Fig. 33; the wings are slightly

milky with yellow veins and a fine dark costal line.

Locality. Seychelles. Mahé: Mare aux Cochons district, 1500—2000 ft., I—II. 1909.

Fig. 33. Agromyza, sp.?, wing.

57. Agromyza sp. ?

A second single imperfect specimen. No description can be given in any detail, but

the insect has a remarkable mouth-margin, produced each side into a pointed lobe, which

terminates in a long slightly curved white spine. The insect is quite black ; wings pale

with brown veins; discal cross-vein just about opposite the junction of the first vein with

the costa, and the relative position of the’ two cross-veins just about as shown in Fig. 33 ;

though the terminal section of the fifth vein is shorter than the part bordering the discal

cell, instead of being of about the same length.

Locality. Chagos Islands: Salomon Atoll, Ile de Passe; bred from mines in Scevola

Keenigii (1905).

Leucoris, Meigen.

Leucopis Meigen, Syst. Beschr., xi. (1830), p. 133.

58. Leucopis griseola (Fallén), Dipt. Suec., Agromyz., (1823), p. 8 [Anthomyza].

There is a fairly long series of a species of this genus; they exhibit no structural

differences from the above species, but are on the average somewhat smaller in size, being

from 14 to 12 mm. long. The legs are not quite so definitely coloured and the third

antennal joint is in most cases slightly larger. It is impossible to separate the specimens

satisfactorily from the members of the series of L. griscola in the Cambridge Museum.

Localities. Seychelles. Silhouette: Mare aux Cochons plateau and forest above,

TX. 1908; Mahé: country above Port Glaud, 500—800 ft., 5. XI. 1908; Port Victoria,

XII. 1908; Cascade Estate, about 1000 ft.; Anonyme Island, I. 1909; marshes on coastal

plain, Anse aux Pins and Anse Royale, I. 1909. Also known from the Canary Islands.

348 , PERCY SLADEN TRUST EXPEDITION

EXPLANATION OF PLATES 15 AND 16.

PLATE 15.

Fig. 1. Lonchea pluwmata, n. sp., head x 35.

Fig. 2. - 33 n. sp., f°, abdomen x 20.

Fig. 3. = longicornis, n. sp., head x 20.

Fig. 4. , vibrissifer, n. sp:, head x 20.

Fig. 5. Pachycerina seychellensis, n. sp., f, abdomen x 20.

Fig. 6. 5 . n. sp., head x 20.

Fig. 7. Sapromyza striata, n. sp. head x 20.

Fig. 8. ss JSunebricornis, n. sp., head x 20.

Fig. 9. i: mahensis, n. sp., tip of abdomen x 20.

Fig. 10. = a n. sp., tip of abdomen x 20.

Fig. 11. a nudiuscula, n. sp., head x 20.

Fig. 12. 7 crassicaput, n. sp., head x 20.

Fig. 13. ,; perpunctata, n. sp., head x 20.

Fig. 14. Homoneura varifrons, n. sp., head x 20.

Fig. 15. Hecamede lacteipennis, n. sp., head x 15.

Fig. 16. Psilopa longicornis, n. sp., head x 25.

Fig. 17. Parydra tuberculifera, n. sp., front femur x 2

Fig. 18. e - n. sp., head x 25.

Fig. 19. Canace mahensis, n. sp., x 22.

Fig. 20. Allotrichoma argentipretexta, n. sp., head x 20.

Fig. 21. Hnchastes scotti, n. g. et n. sp. x 15.

Fig. 22. * » n.g. et n.sp., head x 25.

Fig. 23. <Acanthonotiphila coriacea, n.g. et n. sp. x 22.

PLATE 16.

Fig. 1. Ops glaberrima, n. sp., head, side view x 20.

Fig. 2 5 n. sp., head, top view x 20.

Fig. 3 a " n. sp., thoracic dorsum.

Fig. 4 e - n. sp. var. dentata, nu. var., thoracic dorsum x 20.

Fig. 5. Gampsocera scutellata, n. sp., thoracic dorsum x 20.

Fig. 6. Meroscinis wneifrons, n. sp., head, side view x 25.

dee, 16 FA _ n. sp., head, top view x 25.

Fig. 8 3 rugosa, n. sp., head, top view x 25.

Fig. 9. Hippelates longiseta, n. sp., head x 30.

Fig. 10. Gauraa seychellensis, n. sp., head x 25.

Fig. 11. Oscinis acuticornis, n. sp., head x 45.

Fig. 12. » oculata, n. sp., head, side view x 25.

Fig. 13. ; a n. sp., head, top view x 25.

Fig, 14. a longipennis, n. sp., head, side view x 25.

Fig. 15. . i n. sp. head, top view x 25.

Fig. 16. » halterata, n. sp., head, side view x 25.

Fig. 17 Pe * n. sp., head, top view x 25.

Fig. 18. » varicornis, n sp., head x 25,

Fig. 19. Agromyza pubicornis, n. sp., head x 25.

Fig. 20. 3 funebris, n. sp., head x 20.

Fig. 21. 5 candidipennis, n. sp., head x 25.

PERCY SLADEN TRUST EXPEDITION. TRANS. Linn. Soc.,SER. 2.Z00L. VoL. XV. PL. 15.

(LAMB)

CGLetEWdel 5 E.Wilson, Cambridge

th wy @

ae:

“9

DIPTERA

No. XX.—THE ACARINA OF THE SEYCHELLES.

By Crcir Warsurton, M.A.

(Plates 17—19, and 4 Text-figures.)

(CommMuNIcATED BY Pror. J. STANLEY Garpiner, M.A., F.L.S.)

Read 20 June, 1912.

THe Acarina here recorded were obtained from two sources. A certain number—

naturally comprising the larger forms for the most part—were collected on the spot and

were submitted for examination either mounted on cards, or in tubes containing alcohol.

It was not to be expected that such minute objects as the smaller Oribatidee should be

represented in such a collection, and the presence of numerous examples, considerably less

than a millimeter in length, was a matter of surprise. Few species, however, were

obtained in this way, the great bulk of the collection consisting of two large Oribatidee—

Oribata alata and Neoleodes rugosus, n. sp.—and some tubes of the huge Gamasoid mites

Holothyride.

The second source possesses a particular interest. Instead of troubling to collect

creatures so microscopic, members of the Expedition were asked to send home tins

containing fresh damp moss, in which many of the Oribatide habitually live. It had

been previously ascertained* that mites will arrive alive and in good condition in such

moss when despatched from the most distant parts of the world, even if the tins are

hermetically sealed. Obviously it is possible in the laboratory to detect objects which

would certainly be overlooked in the open, and any great extension of our knowledge of

Oribatidee will probably come from the application of this method. Only once previously

has a record of mites obtained in this manner from a foreign country been published. In

1906 my friend Mr N. D. F. Pearce described, in the Journal of the Royal Microscopical

Society, the mites contained in moss from the Sikkim Himalaya.

A simple machine devised by Berlese and described by him in “ Redia,” vol. i. p. 85,

is of the greatest assistance in collecting living mites from the moss or other material in

which they live. It consists essentially of a large tin funnel surrounded by a water-jacket.

The moss is placed on a tray of wire gauze at the top of the funnel, and the water

surrounding the funnel is heated by a Bunsen’s burner. As the moss dries the mites

descend, till at length they drop down the funnel into a small vessel containing water,

placed ready for their reception. By this means the moss is searched much more

thoroughly and with much less labour than by the alternative method of shaking it over

white paper and collecting the mites individually as they reveal themselves by commencing

to crawl about over the surface.

* Proc. Camb. Phil. Soc., vol. xiv., pt. 1, p. 13.

350 PERCY SLADEN TRUST EXPEDITION

There are special difficulties in dealing with specimens of the minute size of many of

the Oribatidee mites. They are frequently so small that it is impracticable to preserve

them separately in tubes of spirit, for, apart from the fact that their legs curl up so as to

obscure important points of structure, they are extremely liable to be lost altogether. It

is therefore generally necessary to mount them speedily in balsam, but even so many

characteristics easily visible in the living specimen are lost to sight. The ideal method

would be to examine each specimen and make elaborate notes upon it before mounting,

but this would presuppose an amount of leisure on the part of the investigator which is

very unlikely to be at his disposal. The consequence is that many specimens are secured

which may easily be new species, but of which a sufficiently clear view cannot be obtained

to make out the essential points, and it is only safe to describe such species as can be

examined with some degree of accuracy.

ORIBATID.

As far as investigation has at present proceeded there appears to be a remarkable

similarity between the Oribatid fauna of the most widely separated regions of the world.

No creatures would seem to be less likely to distribute themselves widely, since they are

wingless and destitute of the silken threads by which spiders migrate, nor do they infest

ships, or cling to animals or birds. Yet what appear to be precisely the same forms occur

thousands of miles apart, and those which are obviously different seldom vary greatly from

the general European type.

In the moss from the Sikkim Himalaya, Mr Pearce found 20 species, divided among

12 genera, and of these 12 were British. In the more plentiful material from the

Seychelles, omitting numerous unsatisfactory specimens, 36 species were made out,

representing 12 genera, and of these species 12 were British or at all events deserving of

no more than varietal rank. It is remarkable that four of the British species—Oribata

alata, Tegeocranus velatus, Hermannia convexa, and Nothrus tectorum were the same in

each case. No representatives of the genera Pelops or Cepheus were found.

The following is a complete list of the Oribatidze from the Seychelles.

Oribatine. 15. Notaspis clavipectinata var. calva, n. var.

1. Oribata alata (Herm.). 16. Notaspis impolita, n. sp.

2. Oribata cuspidata, Mich. 17. Notaspis reticulata, n. sp.

3. Oribata brevis, n. sp. 18. Notaspis lamellicornis, n. sp.

4. Oribata elongata, un. sp. 19. WNotaspis flagellata, n. sp.

5. Oribata mammillata, n. sp. 20. Motaspis simplex, n. sp.

6. Oribata longissima, n. sp. 21, Wotaspis acutipes, n. sp.

7. Oribata seychellensis, n. sp. 22. Notaspis frontata, n. sp.

8. Oribata lata, n. sp. Damzine.

23. Amerus seychellensis, n. sp.

Notaspidine.

P 24, Dameus retiarius, n. sp.

9. Tegeocranus velatus, Mich. 25. Dameus complanatus, n. sp.

10. Carabodes labyrinthicus, var. clavatus, n. var.

11. Liacarus piriformis, n. sp. Nothrinz.

12. Notaspis splendens (C. L. Koch). 26. Hermannia conveaa (C. L. Koch).

13. Notaspis sculptilis, Warburton and Pearce. 27. Hermannia nasata, n. sp.

14. WNotaspis clavipectinata, Mich. 28. Meoleodes rugosus, n. sp.

WARBURTON—THE ACARINA OF THE SEYCHELLES 351

29. Neoleodes striatus, n. sp. 34. Nothrus scotti, n. sp.

30. Weoleodes femoralis, n. sp. 35. Hypochthonius pallidulus, C. L. Koch.

31. Nothrus seychellensis, n. sp.

32. Nothrus tectorum var. longipes, n. var. Phthiracarinae.

33. Mothrus prismaticus, n. sp. 36. Phthiracarus ardwus (C. L. Koch).

Notes on BRITISH SPECIES OF ORIBATIDA, OR VARIETIES OF THEM,

FROM THE SEYCHELLES.

Specimens of Oribata alata appear to be very plentiful everywhere ; a large number

were taken on the spot, and the species was present in all the consignments of moss.

Their size was extremely variable, some specimens exceeding 1°5 mm. in length, while

others were no more than ‘7 mm. They also varied somewhat in texture, some being

entirely glossy and polished, while others were more or less punctate and duller in appear-

ance. Nevertheless all attempts to divide the numerous examples into clearly marked

varieties failed. It is known that O. alata is a very variable species ; examples occurred

in the Sikkim moss examined by Mr Pearce, but these were all large (about 1:2 mm.), and

he alludes to them as O. alata var. major.

A few examples of what appeared to be O. cuspidata occurred in moss from Mt

Alphonse.

The only Tegeocranus found was the cosmopolitan 7. velatws, which occurred frequently

in moss wherever collected. It has generally been found present in moss from any part of

the world as far as investigations have been carried out hitherto. It is extremely doubtful

whether this minute creature is properly attributed to the genus Tegeocranus, and there

is no evidence that the Seychelles possess any forms allied to the extremely common

European species 7’. cepheus.

A small Carabodes occurred fairly plentifully in moss from the Cascade Estate. It

precisely resembled a somewhat small C. labyrinthicus except that the hairs on its body

were distinctly clavate, and it was therefore considered as a variety of that species and

named C. labyrinthicus var. clavatus.

The genus Notaspis is generally well represented, as regards its smaller forms, in

moss from any locality, and the Seychelles examples were numerous, and included some

which were referred without much hesitation to the British species N. splendens,

N. sculptilis and N. clavipectinata. A few agreed with the last-named species in every-

thing but the absence of hairs on the pseudostigmatic organs, and are recorded as

N. clavipectinata var. calva.

The only Hermannia found occurred in moss from Mahé. It was indistinguishable

from the well-known H. convewa, though somewhat smaller than British examples.

Among the four representatives of the genus Nothrus obtained from Seychelles moss

only one strongly resembled a previously known form. It is described below as N. tectorum

var. longipes.

The solitary species of Hypochthonius observed appeared to differ in no respect from

H. pallidulus, and there seemed to be no reason to separate the forms of Phthiracarus

obtained from the European species Ph. ardwus.

* The localities unless otherwise mentioned are in the Island of Mahé.

SECOND SERIES—ZOOLOGY, VOL. XV. 4

352 PERCY SLADEN TRUST EXPEDITION

DESCRIPTION OF NEW SPECIES OF ORIBATIDA,

Oribatine.

3. Oribata brevis, n. sp. (Pl. 17, fig. 1).

Very small, less than ‘2 mm. in length, texture rather rough. Cephalothorax as long

as abdomen; lamelle long, broad, blades on edge; pseudostigmatic organs short and

clavate. Abdomen broad-oval. Pteromorphe short, with sharp anterior projections.

Legs short, monodactyle.

Several specimens occurred in moss from Mt Alphonse.

Though not as yet described, specimens of what appears to be the same species have

been received from British Guiana.

4. Oribata elongata, n. sp. (Pl. 17, fig. 5).

Length about ‘4 mm.

Body long and narrow, only the claws of legs 4 appearing beyond it. Lamellee

narrow lateral ridges, without cusps or translamella; pseudostigmatic organs long curved

rods with oval, roughened termination. No dividing line between cephalothorax and

abdomen. Pteromorphz long, narrow, only very slightly projecting forwards. Legs

monodactyle (or tridactyle, very heterodactyle).

From moss, Mahé, Mt Alphonse.

5. Oribata mammillata, n. sp. (Pl. 17, fig. 7).

Length about ‘4 mm.

Elongate, the whole body covered with fine mammillz. Lamelle faint long ridges,

without cusps or translamella. Pseudostigmatic organs long, sinuous, clavate. Abdomen

long, with six very short clavate hairs at the posterior end; pteromorphe short, strap-like,

rounded anteriorly, mammillate like the abdomen. Legs monodactyle, 1 and 2 strong with

slight protuberance on the penultimate article, 3 and 4 weak.

~ In moss from Silhouette.

6. Oribata longissima, n. sp. (Pl. 17, fig. 6).

Very much like O. elongata, but still more elongate, the fourth pair of legs not nearly

attaining the end of the abdomen. Lamellz longer; a faint translamella. The pseudo-

stigmatic organs are long and curved backwards; in profile they appear filiform, but in

the dorsal aspect they are very slightly clavate. Legs monodactyle (or tridactyle, very

heterodactyle).

In moss from Cascade Estate, Mahé.

7. Oribata truncata, n. sp. (Pl. 17, fig. 4).

Length about -45 mm.; three specimens distinctly larger.

An Oribata of the alata type; cephalothorax unmarked, very convex, bordered by

very low ridge-like lamellee and translamella ; pseudostigmatic organs long, fairly stout

WARBURTON—THE ACARINA OF THE SEYCHELLES 353

rods. No division between cephalothorax and abdomen. Abdomen oval, truncated

behind, glossy but finely punctate ; pteromorphze roundly prominent in front, moveable,

the external border notched at its anterior third. Legs with broad flattened femora,

tridactyle.

Numerous specimens mounted on card by Mr Scott. Mare aux Cochons district,

about 1500 ft. and near Pot-d-eau, Silhouette.

7. Oribata seychellensis, n. sp. (PI. 17, fig. 3).

Length about 5 mm.

Cephalothorax rather long, fairly pointed. Lamellar ridges long, with blunt cusps

3 from anterior end, then continuing and converging nearly to the anterior border ; no

translamella. Pseudostigmatic organs short thick clavate rods. Abdomen with elegant

contour, recalling O. gracilis; pteromorphe rather short and deep, folded well downwards,

and hardly visible dorsally. Texture glossy, but with very fine shallow punctations.

Tridactyle.

Numerous specimens mounted on card. Cascade Estate, about 1000 ft. Also from

moss, Mt Alphonse.

8. Oribata lata, n. sp. (Pl. 17, fig. 2).

Length about °85 mm.

Texture dull, with minute punctations and rugosities. Cephalothorax broad and

short ; lamelle strong converging ridges extending about half the length, of the cephalo-

thorax and with very slight blunt cusps bearing strong lamellar hairs, and continued as

fainter ridges ; a strong translamella. Pseudostigmatic organs fairly long, rather strong

curved rods. A slight carina extends backwards from the middle of the translamella.

Abdomen as broad as long, presenting a shagreened appearance, with two or three

longitudinal striz in the median anterior portion. Pteromorphz moderately long but

shallow, deepest anteriorly, rounded in front. Legs tridactyle.

One specimen, mounted on card, taken in the forest above the Cascade Estate.

Notaspidine.

11. Liacarus piriformis, n. sp. (Pl. 17, fig. 8).

Length about ‘8 mm.

Pear-shaped, with fairly long, tapering cephalothorax and nearly circular glossy

abdomen. Lamellze and translamella ridge-like, making the letter A on the cephalothorax

with the cross-bar rather anterior. Strong lamellar and inter-lamellar hairs. Pseudo-

stigmatic organs fairly long, stout, curved rods with oval tip. Legslong. Femora of legs

2 with slight antero-inferior prolongation. Tridactyle. No division between cephalo-

thorax and abdomen.

One specimen (mounted on card) from Mahé, near Morne Blane; one specimen, from

moss, over 2400 ft. and four from Mare aux Cochons, both Silhouette.

45—2

354 PERCY SLADEN TRUST EXPEDITION

15. Notaspis clavipectinata var. calva, n. var.

In size and details of structure apparently precisely like N. clavipectinata except

that the clavate pseudostigmatic organs are destitute of the hairs present on those of

the type.

Moss, Silhouette.

16. Notaspis impolita, n. sp. (PI. 18, fig. 12).

Length about ‘4 mm.

Dark, piriform, texture rough. Cephalothorax long, rather bluntly pointed. Lamelleze

ridge-like extending from pseudostigmata to near the anterior border. Pseudostigmatie

organs of medium length, curved, the thickened terminal portion roughened. Abdomen

with four rather conspicuous hairs on dorsum and six very short clavate hairs at posterior

end. Legs with nearly circular femora in lateral aspect. Tridactyle, heterodactyle.

Moss, Silhouette.

17. Notaspis reticulata, n. sp. (Pl. 18, fig. 13).

Length about *5 mm.

Colour dark, the whole surface reticulate, the cells of the reticulation largest in the

median region of the abdomen. Cephalothorax rather broad and blunt anteriorly.

Lamellz narrow blades on edge. Pseudostigmatic organs fairly long, thick, clavate,

roughened and darker coloured at the end. Palps well visible dorsally. Abdomen flat

dorsally, fringed posteriorly with detachable material held by strongly-curved clavate

hairs. Legs short, stout, with similar fringing material held by clavate hairs, but easily

removed. ‘Tridactyle.

Moss, Silhouette.

18. Notaspis lamellicornis, n. sp. (Pl. 18, fig. 14).

Length about °52 mm.

Cephalothorax long and pointed. In size and general appearance the mite closely

resembles NV. maculosa (Warburton and Pearce, Proc. Zool. Soc., 1905, i. p. 567) but the

lamellee are short and converging, and the general texture is less roughened. The abdomen

possesses numerous hairs. Legs monodactyle. The pseudostigmatic organs are long and

pectinate, recalling the antennze of a lamellicorn beetle.

Moss, Silhouette.

19. Notaspis flagellata, n. sp. (Pl. 17, fig. 9).

Length about 55 mm.

Cephalothorax long and pointed, without lamellz; the hinder portion extremely

gibbous. Pseudostigmatic organs characteristic, being at first straight and clavate, but

produced beyond the oval club-head into a whip-like process of somewhat greater length.

Abdomen sub-circular, bearing a few very short hairs. Legs long and slender; monodactyle.

This mite bears a general resemblance to the very Notaspis-like Dameus nitens, but

it undoubtedly belongs to the genus Notaspis.

Moss, Palm Valley, Praslin.

WARBURTON—THE ACARINA OF THE SEYCHELLES 355

20. Notaspis simplex, n. sp.

Differs only from N. flagellata in its somewhat smaller size and in the clavate pseudo-

stigmatic organs which are destitute of the whip-like prolongation.

Moss, Palm Valley, Praslin.

21. Notaspis acutipes, n. sp. (Pl. 17, fig. 10).

Length about °35 mm.

Cephalothorax almost an equilateral triangle. Lamellze short converging ridges with

slight cusps; a well-marked translamella. Pseudostigmatic organs rather long and clavate,

with long-oval termination. Abdomen oval, somewhat pointed behind, finely punctate all

over, giving a roughened appearance. Legs long and slender ; tarsi particularly long and

sharp ; monodactyle.

Moss, Mahé.

22. Notaspis frontata, n. sp. (Pl. 17, fig. 11).

Length about “16 mm.

Cephalothorax rather broad; pseudostigmata large, pseudostigmatic organs long,

clavate, with large oval head. The cephalothorax is divided into two regions by a

transverse line between the pseudostigmata with a median anterior loop and two

backwardly projecting processes. The portion in front of this is coarsely reticulate or

pitted. Two additional short lateral longitudinal ridges on the posterior portion.

Abdomen oval, rather broad behind, with four carine in the anterior region and four

clavate hairs behind. Legs moniliform, monodactyle.

A single specimen of this minute species was found in moss from Palm Valley,

Praslin, and was fortunately examined with some care, and roughly drawn, before

mounting it in balsam. It is quite possibly common, but its small size may readily cause

it to be overlooked.

Dameine.

23. Amerus seychellensis, n. sp. (Pl. 18, fig. 15).

Length about °53 mm.

Body dark, very elongate, the cephalothorax almost equal in length to the abdomen.

Lamelle linear, very long and sub-parallel, giving off slight mternal processes a little in

front of the pseudostigmata. Pseudostigmatic organs long, flagelliform, monodactyle.

In general appearance it resembles A. speciosus, Pearce (Jour. Roy. Micr. Soc., 1906,

p. 272), but the cephalothorax is longer and the lateral projections (tectopedia) less

pronounced, while the pseudostigmatic organs are quite different. The abdomen is

similarly furnished with rather long hairs, but is more pointed posteriorly.

A single specimen from moss, Cascade Estate, Mahé.

24. Dameus retiarius, n. sp. (Pl. 18, fig. 21).

Length about *36 mm.

In size and general configuration much like D. verticillipes, Nicolet. Cephalothorax

356 PERCY SLADEN TRUST EXPEDITION

broad at the base, with rather narrow, fairly pointed rostral portion. Pseudostigmata far

apart, pseudostigmatic organs very long and rather thick, flagelliform ; lateral projections

(tectopedia) sharply curved, uncate. The sub-globular abdomen is enveloped in a loose

fine-meshed net, with several curved hairs at its posterior border. The curved lines at

the junction of cephalothorax and abdomen constitute, apparently, an apparatus for the

attachment of the net.

Legs moniliform and encrusted with flanges of detachable material. Monodactyle.

Three specimens from moss, Mt Alphonse.

The curious loosely fitting net over the abdomen occurs in no described species, but

some forms received from British Guiana have the same characteristic.

25. Dameus complanatus, n. sp. (Pl. 19, fig. 20).

Length about ‘6 mm.

The whole dorsum of one level, the abdomen being flat, as though planed (see profile,

fig, 20a). Cephalothorax sub-triangular, the lateral chitinous projections (tectopedia)

well developed. Pseudostigmata small and very far apart; pseudostigmatice organs

flagelliform. Abdomen nearly circular as seen from above. Legs long and slender, the

femora of legs 1—3 encrusted with flanges of detachable material, giving them a

feathered appearance.

One example from moss, Mt Sebert.

Nothrine.

27. Hermannia nasata, n. sp. (Pl. 18, fig. 16).

Length about “6 mm.

Cephalothorax long, with elongate, sharp-pointed rostral portion. Pseudostigmata

situated far from the abdomen, pseudostigmatic organs short stout rods. Abdomen long,

parallel-sided for most of its length, but finally the sides converge and the end is

truncated. The whole abdomen is strongly reticulate. Legs strong, tridactyle

Two specimens from moss, Mt Sebert.

28. Neoleodes rugosus, n. sp. (Pl. 19, fig. 22).

Length about 1°8 mm,

Cephalothorax broad, divided by a transverse line into two regions of about equal

length, the anterior region smooth, the posterior rugged, and bearing the pseudostigmata,

which are rather near together, and white-rimmed. Pseudostigmatic organs short, sharp,

white spikes, black at the tip (fig. 22a), Lateral chitinous projections behind the first legs

(tectopedia) prominent. Abdomen large, bluntly prominent postero-dorsally, covered by

sinuous rugosities, never, apparently, decorated by a succession of cast skins. Legs long

and strong, densely punctate, with scopulate tarsi. Leg 1 with pedunculate tarsus and

with the penultimate joint projecting somewhat over its base. Tridactyle.

This large species was strongly represented in all the collections, in tubes, in moss,

and among the specimens mounted on card, and appears to be plentiful everywhere.

WARBURTON—THE ACARINA OF THE SEYCHELLES 357

29. Neoleodes striatus, n. sp. (Pl. 19, fig. 23).

Smaller and more elongate than N. rugosus.

Length about ‘9 mm.

Cephalothorax long, the transverse line very anterior, the anterior portion not half

the length of the posterior. Both regions pitted, the posterior more coarsely. Pseudo-

stigmata large, far apart, white rimmed; pseudostigmatic organs short black rods with

oval white head (fig. 23a). Abdomen elongate, widest near the posterior end, with

a short, blunt, caudal process arising from a raised pitted oval area. The anterior median

field is deeply pitted and exhibits a few longitudinal striz, while the posterior lateral

fields have strong transverse or radiating strie. Legs much like those of NV. rugosus.

Four specimens, Praslin, Cétes d’Or Estate.

30. Neoleodes femoralis (Pl. 19, fig. 24).

Small, with pronounced caudal process.

Length about °5 mm.

Cephalothorax broad and blunt, the transverse line anterior. Anterior (rostral)

region pitted, as is also the posterior region except on triangular white areas in front of

the pseudostigmata. Pseudostigmata near together ; pseudostigmatic organs stout white

spikes with black points. Femur of leg I broadened distally and produced into an

infero-external spur.

One specimen (mounted on card) bearing two cast skins, Cascade Estate, Mahé.

31. Nothrus seychellensis, n. sp. (Pl. 18, fig. 18).

Length about °75 mm.

Cephalothorax long, punctate, with rather blunt rostrum. Rostral hairs thick,

white, clavate. Pseudostigmata far apart ; pseudostigmatic organs long, straight, rigid.

Abdomen elongate, rounded posteriorly, punctate, the dorsum concave immediately within

the periphery but raised again in a median longitudinal convex area; about five pairs of

short clavate hairs in two longitudinal rows on the convex median region, and four on

either side of the body. The rounded posterior end with four terminal and two sub-

terminal (more dorsal) clavate hairs. Legs moderately long and strong, tridactyle.

Apparently a common species in moss, Mt Alphonse, Mt Sebert, and under stones.

32. Nothrus tectorum var longipes, n. var.

In size and appearance much like NV. tectorwm but on close examination its texture is

seen to be coarser and its legs somewhat longer. The pseudostigmata are farther apart,

and the pseudostigmatic organs are long, very slender stems with slightly thickened,

black tip. The dark lateral patches on the abdomen are present, and there are some

clavate hairs at the posterior end, though (at all events in the mounted specimens) the

dorsal hairs are not visible.

Fairly common in moss from Palm Valley, Praslin.

358 PERCY SLADEN TRUST EXPEDITION

33. Nothrus prismaticus, n. sp. (Pl. 18, fig. 17).

Length about °3 mm.

A very small species, about the size of N. monodactylus. Cephalothorax long,

pointed. Pseudostigmata far apart; pseudostigmatic organs ? Abdomen divided by

straight ridges into areas in different planes, giving a prismatic effect. Sides parallel, two

longitudinal ridges dividing the greater part of the abdomen into three regions, the

median horizontal, the laterals sloping downwards; the posterior declivity truncated and

divided by ridges into two diamond-shaped and one triangular surface. Fairly long

peripheral hairs, especially at the posterior end. Legs short and not very strong.

One specimen from moss, Mahé.

34. Nothrus scotti, n. sp. (Pl. 18, fig. 19).

Length about *6 mm.

Cephalothorax almost an equilateral triangle; pseudostigmata far apart, pseudo-

stigmatic organs long, filiform; rostral hairs short and clavate. Abdomen parallel-sided,

somewhat concave dorsally but with the median area rising again slightly and bearing

five pairs of spatulate hairs; four pairs of similar hairs on either side. Posterior end

truncate and bearing two blunt protuberances each carrying a long outwardly curving

hair. The middle posterior region protrudes at a lower level and bears two short clavate

hairs. The whole surface has a roughened or shagreened appearance.

Found in company with J. seychellensis in moss from Mt Sebert, and named after

Mr Hugh Scott.

HoLoTHyRiID&.

With the exception of the Ixodoidea, or ticks, hardly any of the Acarina approach in

size the curious Gamasoid mites, for which Thorell in 1882 established the family

Holothyridz. Gervais in 1842 had described one of the forms under the generic name of

Holothyrus, “a new genus of Acarina of the family Oribates.” Thorell perceived its

nearer relation to the Gamaside, but agreed that it approached the Oribatide in some

respects. He saw, however, sufficient grounds for regarding these creatures as con-

stituting a family apart. They are certainly Gamasoid in general character.

Besides their comparatively immense size—they may attain a length of 7 mm.—the

Holothyride possess several remarkable characteristics. Perhaps the most remarkable is

the presence in the buccal cavity of a radula, strictly comparable to that of a member of

the Glossophora. Another striking feature is the great size and the complicated structure

of the female genital opening. This is large in the Oribatidze, but in the Holothyridee its

relative dimensions are very much larger and its structure quite different. Instead of two

folding doors meeting in the middle line there are four moveable pieces, the largest hging

from the posterior end, two side-pieces opening outwards, and a shallow lid-like piece hinging

in front. When open, the apparatus presents a comparatively immense gap in the body

of the animal. In material from the Seychelles Thon* found three species of Holothyrus,

* Zool. Jahrb. Bd. xxiii, 1906, p. 677.

WARBURTON—THE ACARINA OF THE SEYCHELLES 359

all new. These he named H. brauert (37), H. seychellensis (38) and H. niger (39), the

last-named being only represented by the male. All three species occurred in the

material here dealt with, which also furnished what is apparently the female of H. niger

and a new form described below as H. gardineri.

39. Holothyrus niger Thon, ¢. (Text-figure 4.)

Of the colour and general appearance of the ¢, but destitute of its leg armature and

slightly smaller (about 5°8 mm. in length). The genital armature (text-figure 4) is of

characteristic design. The median plate (hawptplatte) is unusually small, the anterior and

lateral plates encroaching much upon it. It is produced forward antero-laterally into two

cornua which entirely separate the anterior plate from the lateral plates, and its sides are

deeply excavate for the reception of the unusually broad lateral plates.

Four specimens in company with several males, from Silhouette.

40. Holothyrus gardineri, n. sp. (Text-figures 1—3).

1 4

Fig. 1. Venter of H. gardineri 6. Fig. 2. Legs I and II, and tarsi ITI and IV of H. gardineri .

Fig. 3. Genital plate of H. gardineri?. Fig. 4. Genital plate of H. niger ?.

Male about 4 mm. in length, black-brown, not highly polished. Genital area in

general design like that of H. longipes but with the prominences at its postero-lateral

limits much more salient. Peritreme broadest in the middle and tapering to either end.

Legs moderately long and slender and only sparsely clothed with hairs; leg 1 with

the tarso-metatarsus of the same colour as the rest of the animal and only slightly dilated,

and with a fairly strong spur under the distal end of the patella ; tarsi of legs 2, 3, and 4 with

three terminal spurs, two being more or less dorsal and the third lateral on the external

side, and small conical spur on the under surface towards the distal end—very small on

leg. 4.

Female about 4:5 mm., of the colour and general appearance of the male, but with

the legs destitute of the patellar and infra-tarsal spurs. Genital area large, the median

plate very broad, with sides almost rectilinear, and its anterior border a sinuous transverse

line. Lateral plates very small and narrow; anterior plate very broad and shallow.

Two ¢ and two 9, taken in the jungle, Mahé, at an elevation of over 1200 ft.

The details of structure recall H. longipes Thorell, but the legs are not especially

long, the anterior leg of the male measuring about 5 mm.

I have named this species after Professor J. Stanley Gardiner.

SECOND SERIES—ZOOLOGY, VOL. XV. 46

360 PERCY SLADEN TRUST EXPEDITION

IxopID&.

The only ticks in the collection were taken from a Fox-terrier at Mahé and belonged

to the species Rhipicephalus sanguineus (Latr.). This species, being more especially a

dog-parasite, has penetrated to most of the fairly warm regions of the world. Its original

home was probably Africa. It is known to be one of the conveyors of canine piro-

plasmosis.

(Four species of ticks, collected by the Expedition in the smaller islands which were

visited, were recorded by Professeur L. G. Neumann in the Trans. Linn. Soc., Zool., ser. 2,

vol. x11, pp. 193—6. Of these the above mentioned Rhipicephalus sanguineus (Latr.)

was obtained on Cerf Island, Providence. This is an uninhabited island only occasionally

visited by fishermen from an island, 15 miles away, on which there are no dogs. It is,

however, a great breeding place for birds, from which we supposed the ticks to have

come. J. 8. G.)

EXPLANATION OF PLATES 17, 18, AND 19.

PLaTE 17. Fig. 15. Amerus seychellensis.

Fig. 1. Oribata brevis. Fig. 16. Hermannia nasata.

iis 2 later Fig. 17. Nothrus prismaticus.

g: ° ” ° A .

Fig. 3. » seychellensis. Fig. 18. » seychellensis.

Fig. 4. » truncata. Fig. 19. » scott.

Fig. 5. Ps elongata. Prana

Fig. 6. » longissima. :

Fic. 7. , qaarmallata: Fig. 20. Dameus complanatus.

Fig. 8. Lnacarus piriformis. 3 o Profile.

Fig. 9. Notaspis flagellata. Fig. 21, Dameus retiarius.

Fig. 10. i acutipes. Fig. 22. Neoleodes rugosus.

Fig. 11. Pe Frontata. a. Profile. ? :

b. Pseudostigmatic organ.

PLaTE 18. Fig. 23. Neoleodes striatus.

Fig. 12. Notaspis impolita. a. Pseudostigmatic organ.

Fig. 13. * reticulata. Fig. 24. Neoleodes femoralis.

Fig. 14. . lamellicornis. a. Profile.

PERCY SLADEN TRUST EXPEDITION. TRANS. LINN. Soc., SER. 2.Z00L VOL.XxV PL.17

( WARBURTON)

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(WARBURTON)

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(WARBURTON)

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No. XXI.—COLEOPTERA, COCCINELLIDZ.

Par LE Dr SIcaArp.

(CoMMUNIQUE PAR M. LE Proresseur J. Stantey Garpiner, M.A., F.R.S., F.L.S.)

Lu le 20 Juin 1912.

1. Cydonia lunata (Fabr.), ab. sulphurea (Ol.); Sicard, Ann. Soc. Ent. France,

vol. 78, 1909, p. 79.

Loc. Aldabra (Fryer). Cosmoledo (Thomasset). Madagascar, Afrique Tropicale, ete.

2. Chilomenes sex-maculata (Fabr.), ab. interrupta (Fabr.).

Loc. Iles Chagos, 1905: Salomon Atoll, Ile de la Passe, sur la Scevola Kenigu ;

Peros Banhos ; Diego Garcia. Inde, Java, Sumatra, ete.

3. *Kxochomus leviusculus Weise, Arch. Naturg., 75. 1. 1909, p. 124.

Loc. Aldabra (Fryer). Madagascar.

4, Rodolia chermesina, Muls.; Sicard, op. cit. p. 116.

Loc. Seychelles. Silhouette: Mont Pot-d-eau, 1000—1500 pieds; Mare aux

Cochons. Mahé: Morne Blanc; Port Glaud (500—1000 pieds); Cascade Estate (1000

pieds) ; Mont Sebert (2000 pieds env.); Long Island. [le Dennis (Fryer). Madagascar,

Iles Mascareignes.

ab. dionysia Sicard, 1. c.

Mémes localités.

5. Pullus plutonus, Muls.; Sicard, op. cit. p. 141.

Loc. Seychelles. Silhouette: Mont Pot-i-eau (1500 pieds); Mare aux Cochons,

plateau et foréts; Pointe Etienne, endroit cultivé au niveau de la mer. Mahé: endroits

cultivés prés de Port Glaud (500—1000 pieds) ; foréts de Morne Blanc et de Morne Pilot

(1000—2000 pieds); Mare aux Cochons, foréts (1000—2000 pieds); Cascade Estate (1000

pieds) et foréts environnantes; Anse aux Pins et Anse Royale, au niveau de la mer;

Morne Seychellois (1500—2000 pieds) ; sur les branches de différents arbres abattus. Ile

Marie Anne, forét. Madagascar.

6. Pullus arrow, n. sp.

Oblongo-ovatus, niger, pilosus ; elytris macula oblonga lutea in disco notatis ; palpis

antennis ano pedibusque fulvis. Mas capite rufo.

Long. 0m. 0022.

* Kolbe records the widespread Zxochomus nigromaculatus (Goeze) as having been found in Aldabra:

see Abh. Senckenb. Ges., xxvi., 1902, p. 584.—H. Scorr.

46—2

362 PERCY SLADEN TRUST EXPEDITION

En ovale oblong, atténué en arriére ; médiocrement convexe, luisant. Téte jaune (¢)

ou noire (?), & peine pubescente ; palpes et antennes roux. Corselet noir; rétréci en avant,

& cdtés peu arrondis, sinué @ la base; ponctuation fine, pubescence jaunatre, fine et peu

dense.

Elytres réguliérement ovales, atténués a l’extrémité et arrondis ensemble en are de

cercle assez large; 4 ponctuation plus forte et & pubescence plus fournie que le corselet ;

noirs avec une grosse tache ovale, jaune paille sur le disque de chacun, couvrant un peu

plus du tiers de la longueur et environ les deux tiers de la largeur ; également éloignée de

la base et de l’extrémité dans le sens de la longueur et du bord externe et de la suture

dans le sens de la largeur.

Dessous noir, avec l’extrémité du dernier segment abdominal et les pieds roux;

plaques fémorales complétes, grandes, couvrant environ les trois quarts du premier arceau

du ventre, dont leur partie externe atteint l’angle antéro-externe. Prosternum plat,

tronqué, 4 carinules indistinctes.

Cette espéce est voisine, comme coloration, du Scymnus cryptogonoides. Elle s’en

distingue, outre les caractéres tirés des plaques abdominales, par sa forme plus oblongue

et moins convexe, et par la tache réguliérement ovale des élytres.

Elle se distingue du Nephus seychellensis, dont la coloration est analogue, par sa

tache élytrale plus courte, ses élytres concolores 4 l’extrémité, sa forme moins aplatie et

moins paralléle.

Elle parait plus rare que les deux espéces précitées.

Loc. Seychelles. Silhouette: Mare aux Cochons (1200 pieds env.).

7. Scymnus constrictus, Muls.; Sicard, Ann. Soc. Ent. France, vol. 78, 1909, p. 143.

Loc. Iles Cargados Carajos: Siren Island (1905). Iles Providence: Ile du Cerf

(1905).

Seychelles. Silhouette: presque toute la région des hautes foréts ; environs du Mont

Pot-d-eau (1500 pieds), etc. Mahé: plantes herbacées, dans les cultures: Port Victoria ;

Cascade Estate; environs du Morne Blanc (1000 pieds) ; plaine de |’Anse aux Pins et de

l Anse Royale. Ile Félicité. Bird Island (Fryer). Madagascar, Maurice, Comores.

ab. intercisus Sicard, op. cit. p. 144.

Plus répandu que le type.

Loc. Silhouette: presque toute la région des hautes foréts et des bords de la mer ;

Grande Barbe, sur les fleurs de Tournefortia argentea; Mare aux Cochons (plateau et

foréts). Mahé: environs de Port Glaud; Port Victoria; Cascade Estate (800—1000

pieds) ; plaines de l’Anse aux Pins et de l’Anse Royale; Anonyme Island.

8. Scymnus cryptogonoides, n. sp.

Subrotundatus, convexus, nitidus, pilis albidis sat dense vestitus; niger; capite (toto

g, aut antice ¢), plaga magna discali elytrorum, pedibus, antennis palpisque luteis ;

segmento ultimo abdominis epipleurisque prosterni rufis.

Long. 0m. 0025.

Subarrondi; convexe, forme et dessin du Cryptogonus orbiculus Gyll. Téte jaune

SICARD—COLEOPTERA, COCCINELLIDA 363

chez le ¢, noire chez la ?, avec deux taches triangulaires 4 la partie antéro-interne des

yeux d'un jaune pile. Antennes et palpes jaunes. Corselet noir, 4 ponctuation fine et

dense, 4 pubescence trés fine et assez clairsemée. Kcusson noir. LElytres plus larges que

le corselet & la base, 4 calus huméral petit, brillant, 4 ponctuation plus grosse et plus dense

que celle du corselet, 4 pubescence assez longue, blanchatre, souvent frottée sur la partie

convexe, qui est luisante ; noirs, avec sur le disque de chacun une grosse tache d’un jaune

paille, semilunaire 4 convexité postéro-externe, étendue environ du sixiéme aux trois

quarts de la longueur et couvrant 4 sa partie postérieure les quatre cinquiémes de la

largeur, laissant la base, une large bordure suturale élargie en avant, une étroite bordure

externe et le quart postérieur noirs.

Dessous noir, avec le dernier segment abdominal et les épipleures du corselet d’un

jaune rouge. Carénes du prosternum 4 peine visibles, trés faibles, se rejoignant en avant

en ligne courbe étroite. Mésosternum droit en avant; suture méso-métasternale 4 peine

visible, en ligne droite; mésosternum couvert de gros points superficiels écartés.

Ligne fémorale prolongée jusqu’aux trois quarts de la longueur, puis paralléle au bord

postérieur du premier segment abdominal, effacée vers les trois quarts externes avant

d’atteindre le bord latéral.

Loc. Seychelles. Silhouette: hautes foréts; Mont Pot-d-eau; Mare aux Cochons,

plateau et foréts.

ab. lunulatus, nov.

Taches des élytres trés grandes, atteignant le bord latéral et ne laissant qu'une étroite

bordure suturale noire.

Pieds d’un jaune roux.

Loc. Silhouette: Mare aux Cochons, plateau et foréts.

9. Nephus seychellensis, n. sp.

Oblongus, parum convexus, supra niger, pubescens; elytrorum plaga magna discali

limboque apicali luteis; subtus piceoniger, ultimo segmento abdominis rufo-brunneo ;

antennis palpis pedibusque luteis, femoribus posterioribus plus minusve infuscatis.

Long. 0m. 0017.

En ovale oblong, peu convexe et semblable comme forme au Nephus redtenbacheri

Muls., et sans doute au N. voeltzkowi Weise, qui m’est inconnu. Dessus noir, avec la téte

plus ou moins brundtre. Antennes et palpes d’un jaune flave. Corselet noir, 4 peine

rembruni en avant. Elytres 4 peine plus large que le corselet 4 la base, presque paralléles,

largement en ovale aplati 4 l’extrémité; noirs, avec une grande tache d’un jaune paille

couvrant les deux tiers de la longueur et les trois quarts de la largeur, un peu plus éloignée

de la base que de l'extrémité ; cette dernitre étroitement d’un jaune rougedtre. II reste

de la couleur fonciére une légére bande suturale et latérale; calus huméral oblong et

saillant, situé sur la partie noire; ponctuation fine, pubescence blanchitre, courte et assez

dense.

Dessous d’un noir de poix avec l'extrémité de l’abdomen plus claire. Prosternum

large, sans carénes, rebordé entre les hanches ; suture méso-métasternale effacée ; premier

364 PERCY SLADEN TRUST EXPEDITION

segment ventral aussi long que les trois suivants réunis; plaque abdominale grande,

incomplete, ligne fémorale en are de cercle qui n’atteint pas tout a fait la partie postérieure

du premier segment, et lui reste paralléle jusqu’auprés du bord latéral, avant lequel elle

est. effacée.

Le N. voeltzkowi a, d’aprés la description, la tache plus rousse et le corselet roux avec

une tache noire a la base.

Loc. Seychelles. Silhouette: environs du Mont Pot-d-eau (1500 pieds); Mare aux

Cochons et foréts voisines. Mahé: environs de Port Glaud (500—1000 pieds) et du

Morne Blanc (1000 pieds) ; sur les plantes herbacées, dans les endroits cultivés ; Cascade

Estate (800 & 1000 pieds) ; plaine voisine de l’Anse aux Pins et de l’Anse Royale; sur les

arbres des Capucins (Northea) rabougris au sommet de la Montagne de l’Anse Major

(2000 pieds et au dessus).

10. Nephus oblongo-signatus (Muls.); Sicard, Ann. Soc. Ent. France, vol. 78, 1909,

p. 145.

Loc. Iles Cargados Carajos ; Establishment Island et Siren Island (1905).

Seychelles. Silhouette: presque toute la région des hautes foréts ; environs du Mont

Pot-d-eau (1500 pieds); Mare aux Cochons et foréts voisines. Mahé: environs de Port

Glaud (500—1000 pieds), environs du Morne Blane (1000 pieds); sommet du Mont Pilot

(2000 pieds) ; sur les plantes herbacées jusqu’é 1000 pieds; Port Victoria; Cascade Estate

(1000 pieds) ; plaines de l’Anse aux Pins et de l Anse Royale; Anonyme Island; Long

Island. Maurice.

ab. grinere (Sicard), 7. ¢.

Ne se distingue que par la tache plus petite, arrondie au lieu d’étre ovale, et com-

mengant seulement @ partir du milieu de l’élytre ou plus en arriére.

Seychelles, méme localités, et aussi Bird Island (Fryer). Madagascar.

11. Sticholotis madagassa Weise, Arch. Naturg., 75. 1. 1909, p. 124.

Loc. Seychelles. Mahé: Cascade Estate (800—1000 pieds) ; prés du Morne Blane,

et dans les terrains marécageux au niveau de la mer; Long Island. Madagascar.

PHLYCTENOLOTIS, n. g.

Corpus oblongum, parvum. Palpi maxillares crassi, articulo ultimo acuto. Caput

magnum, insertum, oculis rotundatis, parvis, grosse granulatis. Thorax fortiter trans-

versus, lateribus rotundatis, antice haud angustatis; pilis brevibus sparsim vestitus.

Elytra subparallela, apice rotundata, convexa, glabra, callosa, bullis translucentibus ornata.

Prosternum latum, haud carinatum; mesosternum antice et postice rectum; meta-

sternum magnum, longitudinaliter suleatum, postice rectum. Abdomen 5-segmentatum ;

laminz abdominales extus apertz ; lineze ventrales marginem posteriorem segmenti primi

attingentes.

Pedes mediocri: unguiculi dente basilari instructi.

Ce genre se distingue de tous les autres par les callosités transparentes des élytres,

qui le rapprochent du Pharoscymnus eburifer Sic. Il différe de ce dernier genre par son

———

SICARD—COLEOPTERA, COCCINELLIDA 365

corselet trés transversal, 4 peine rétréci en avant, par ses élytres paralléles & repli trés

étroit, tombant presque droit sur les cdtés, glabres; il a le facies du genre Cephaloscymnus

dont le distinguent ses yeux petits, arrondis en dedans, la forme de ses palpes, sa téte

insérée jusqu’aux yeux dans le corselet. I] doit prendre place prés du genre Pharo-

scymnus Bedel (Pharus auct.).

12. Phlyctenolotis scotti, n. sp.

Oblongo-ovatus, rufus, nitidus; capite nigro, elytris brunneo-ccerulescentibus, bullis

4 luteis subpellucidis ornatis; pedibus rufis.

Ovale oblong, d’un roux fauve avec la téte noire et les élytres bleudtres. Téte grosse,

d’un noir luisant passant au brunatre sur l’épistome et le labre. Front trés large. Yeux

petits, Iégérement ovales, 4 peine entamés par les joues 4 leur partie antérieure ; antennes

rousses, aussi longues que la largeur du front, de onze articles, 4 massue de 4 articles plus

longs que larges, le dernier en triangle 4 l'extrémité; palpes maxillaires roux, trés gros, 4

dernier article un peu rembruni, aigu, non sécuriforme. Menton trés grand, irréguligrement

triangulaire; ponctuation de la téte fine et éparse; pubescence rare, fine et écartée.

Corselet trés transversal, non rétréci en avant, convexe, roux, i cdtés arrondis et légére-

ment rebordés, a base en are de cercle large, finement rebordée ; échancrure antérieure trés

grande et trés profonde, légérement convexe au milieu de son bord postérieur, logeant

la téte jusqu’a la partie postérieure des yeux: angles antérieurs avancés, aigus, les

postérieurs arrondis ; ponctuation fine, peu dense sur le disque, plus serrée sur les cétés et

surtout au niveau des angles antérieurs; pubescence fine, roussitre, clairsemée. Ecusson

extrémement petit, en triangle équilateral. Elytres de la largeur du corselet & la base, &

peu pres paralléles jusqu’aux trois quarts de leur longueur, ow ils s’arrondissent en are de

eercle large (pris ensemble) 4 l’extrémité; trés convexes, 4 cdtés abrupts, non explanés,

avec un rebord mince, extrémement étroit, prolongé jusqu’’ l’extrémité; d'un brun noir

bleuadtre avec une grosse bulle jaunitre, transparente, couvrant environ le quart antérieur

de I’élytre, semilunaire 4 convexité antérieure, et 4 peu prés également éloignée de la base,

de la suture et du bord externe; une deuxiéme bulle, arrondie, de méme couleur, plus

petite, au niveau de la déclivité postérieure des élytres, plus éloignée de l’extrémité que de

la suture et du bord latéral; ponctuation grosse, simple et assez dense, sauf au niveau les

bulles qui sont lisses. Dessous roux, 4 pubescence assez rare, prosternum large, plan

entre les hanches, au niveau desquelles il est fortement rebordé, puis convexe A la partie

antérieure, non caréné. Mésosternum plus large en avant qu’en arriére. Métasternum

grand, lisse, sillonné longitudinalement, coupé carrément 4 sa partie postérieure. Abdomen

de cing segments, le premier plus large que les deux suivants réunis. Plaques abdominales

incomplétes ; ligne fémorale en are de cercle, rejoignant la partie postérieure du segment

avant le milieu en dedans, et confondue ensuite avec elle. Epipleures planes, étroites,

pubescentes, prolongées jusqu’a l’extrémité élytrale en se rétrécissant légtrement.

Fémurs longs, dépassant la partie externe des élytres, droits en arriére, convexes en

avant, sillonnés; tibias plus courts que le fémur, sillonnés pour recevoir le tarse, qui est

large avec des ongles robustes, dentés & la base.

Long. 0m. 002.

366 PERCY SLADEN TRUST EXPEDITION

Loc. Seychelles. Silhouette: Mare aux Cochons et foréts environnantes. Mahé:

Cascade Estate (1000 pieds); environs de Port Glaud (500—1000 pieds) et du Morne

Blane (1000 pieds).

XAMERPILLUS, ND. g.

Oblongus, convexus, supra pilosus; palpi maxillares articulo ultimo subcylindrico,

antice triangulariter emarginato. Abdomen 5-segmentatum. Prothorax transversus.

Elytra subparallela, epipleuris anguste terminatis.

Trés voisin du genre Phlyctenolotis, dont il différe surtout par ses élytres pubescents

et ses palpes maxillaires 4 dernier article cylindrique et bidenté au sommet.

13. Xamerpillus gahani, n. sp.

Oblongus, supra convexus, pilosus; niger; plagis duabus in elytro singulo fulvis;

abdominis segmento ultimo brunneo-rufescente ; epipleuris pedibusque nigris, tarsis dilu-

tioribus.

Long. 0m. 0022.

En ovale oblong, non atténué, mais plutét largement arrondi en arriére avec la

déclivité postérieure des élytres abrupte. Noir, pubescent. Téte noire avec |’épistome

d’un rouge brun. Antennes noires, palpes d’un brun foncé, 4 dernier article subeylindrique

et fortement échancré au sommet, ce qui le fait paraitre bidenté. Yeux arrondis, petits ;

front large et légérement convexe. Prothorax transversal, trés convexe, fortement

échancré en avant avec le bord postérieur de |’échancrure convexe, finement rebordé sur

les cdtés et & la base ; & ponctuation forte et assez dense, 4 pubescence courte, blanchatre,

hérissée. Elytres de la largeur du prothorax & la base ; subparalléles jusqu’aux deux tiers

de la longueur, en arc de cercle large 4 l’extrémité, 4 déclivité postérieure abrupte, 4 bords

latéraux tombant droit, non explanés, & rebord trés étroit et continu, 4 épipleures étroites,

rétrécies & l’extrémité; & ponctuation semblable 4 celle du corselet ; pubescence courte,

blanchatre et dense; noirs & deux taches jaunes: la premiére semi-lunaire, convexe en

avant, droite en arriére, plus rapprochée de la base et de la suture que du bord latéral, la

seconde plus petite, située au niveau de la déclivité postérieure des élytres.

Dessous noir; prosternum large, non caréné; suture méso-métasternale droite ;

métasternum & sillon médian bien marqué, avec deux rangées de gros points le long du

bord antérieur. Ligne fémorale se confondant vers les deux cinquiémes internes avec le

bord postérieur de l’arceau. Ventre de cing segments, le premier aussi long que les deux

suivants.

Pieds noirs avec les tarses brundtres. Ongles dentés & la base.

Loc. Seychelles. Silhouette: environs du Mont Pot-d-eau. Mahé: environs de

Port Glaud (500—1000 pieds) et du Morne Blane (1000 pieds) ; hautes foréts du Morne

Blane et de Pilot; foréts entre Trois Fréres et Morne Seychellois (1500—2000 pieds) ;

sommet du Mont Sebert (2000 pieds); Cascade Estate (1000 pieds) et foréts voisines ;

Mare aux Cochons (1000—2000 pieds).

L’absence de Coccinellides phytophages est tout spécialement & noter.

No. XXII.—TERRESTRIAL ISOPODA, PARTICULARLY CONSIDERED IN

RELATION TO THE DISTRIBUTION OF THE SOUTHERN INDO-

PACIFIC SPECIES*.

By THE LATE Dr G. BuppE-Lunp, CopENHAGEN.

(CoMMUNICATED BY Pror. J. StaNLEY Garpriner, M.A., F.R.S., F.LS.;

Revised BY Rev. T. R. R. Srepsine, M.A., F.R.S.)

(Plates 20—22.)

Read 20th June, 1912.

THE collections of Terrestrial Isopoda obtained from the islands of the Indian Ocean

during the Sealark Expedition were made in the following localities: Chagos Islands,

Cargados, Coetivy, Farquhar, Amirante Islands, and Seychelles.

While collections from the Seychelles Islands have been gathered by different persons,

until now no investigation appears to have been made with regard to these animals living

in the five first-mentioned localities. Consequently I have set forth here all that I have

found belonging to the Isopod-fauna of these islands.

From the Chagos Islands the Sealark Expedition has brought back the following six

species :

Nagara nana Budde-Lund, a species found in Madagascar; I have also seen specimens

from Java and Sumatra.

Metoponorthus pruinosus (Brandt); this cosmopolitan species is taken in all the

islands and in great number.

Allonscus pigmentatus Budde-Lund; this species, first found in Madagascar, was

later taken in many localities on the coasts of the Indian Ocean.

Setaphora pilosa, n. sp. This new species, which I describe below, is related to many

described and hitherto undescribed species found in the Indian islands.

Olibrinus pigmentatus, n. sp. This new species, which I describe below together with

two other new species, one from Djibouti, the other from the Malay Peninsula, belonging

to the same new genus, points as well as the above-mentioned species to the affinity of

the fauna with the fauna of the East Indies.

Spherillo parvus Budde-Lund, from Madagascar, is spread over the islands of the

Indian Ocean.

* All the footnotes are by the Revisor,

SECOND SERIES—ZOOLOGY, VOL, XV. 47

368 PERCY SLADEN TRUST EXPEDITION

From the Cargados Islands the expedition brought back three species :

Angara lenta Budde-Lund. This species is known from most countries around the

Mediterranean Sea; perhaps it is of cosmopolitan distribution.

Metoponorthus* pruinosus (Brandt), a cosmopolitan species.

Trichorhina minutissima, n. sp. Though this species is a new one, I dare not

consider it as peculiar to these islands. The species of the genus Trichorhina are very

tiny animals, and, inhabiting moss and mouldering vegetable refuse, easily escape collectors.

Further, because of their white colour they are easily confounded with the young of other

species. This species, I think, has a wider diffusion.

From Coetivy Island the expedition has brought back four species :

Angara lenta Budde-Lund.

Metoponorthus pruinosus Brandt.

Setaphora suarezi (Dollfus).

Spherillo parvus Budde-Lund.

The two last species have probably entered from Madagascar; the other two are

nearly cosmopolitan.

In the island Farquhar were collected during the expedition the following six species:

Metoponorthus pruinosus (Brandt).

Agnara madagascariensis Budde-Lund.

Alloniscus pigmentatus Budde-Lund.

Aphiloscia annulicornis Budde-Lund.

Setaphora suarez (Dollfus).

Bethalus simplex (Dollfus).

These species are not peculiar to Farquhar. They all inhabit Madagascar and some

extend into East Africa.

From the Amirante Islands are also presented four species, all cosmopolitan :

Angara lenta Budde-Lund.

Cubaris murina Brandt.

Metoponorthus pruinosus (Brandt).

Spherillo parvus Budde-Lund.

Most rich and interesting is the fauna of the Seychelles Archipelago. The first

species of terrestrial Isopods brought home by Prof. Mébius were only two, Cubaris

murina Brandt and Spherillo parvus (Budde-Lund (1) p. 28 and p. 25). In the year

1893 M. A. Dollfus+ gave a catalogue of the species collected by M. Charles Alluaud, in

all seven species. Besides the two species above named, he had brought home Metoponor-

thus pruinosus (Brandt), Alloniscus pallidulus Budde-Lund{, Pseudophiloscia angustissima

Budde-Lund§, Ligia exotica Roux, and Tylos minor Dollfus.

* That Metoponorthus, Budde-Lund, 1879, is a synonym of Porcellionides, Miers, 1877, is explained by

Stebbing in “Records of the Indian Museum,” vol. vi. pt. 4, p. 188, Sept. 1911.

+ Bull. soc. zool. Fr. vol. xviii. p. 186. Paris, 1893. { Anomaloniscus ovatus Dollfus.

§ On p. 372 the species by Dollfus supposed to be Philoscia mina, Budde-Lund, is stated to be P. lateralis.

BUDDE-LUND—TERRESTRIAL ISOPODA 369

Subsequent collectors and the Sealark expedition have obtained twelve species new

to the fauna of Seychelles, and so the total number of the species found in the Archipelago

is to-day twenty :

1. Spherillo parvus (Budde-Lund) M.

2. 5 peltatus Budde-Lund 5.

3h _ maculosus Budde-Lund_ S.

4. Pseudophiloscia lateralis, n. sp. 8.

5. 2 angustissima, n. sp. 8.

6. Mahehia maculata, n. sp. S.

ke - laticauda, n. sp. S.

8. Be bicornis, n. sp. 8.

i):

Cubaris murina Brandt C.

10. Pagana dimorpha (Dollfus) M.

11. Metoponorthus pruinosus (Brandt) C.

12. Nagara cristata (Dollfus) C.

het: 7” nana Budde-Lund M.

14. Alloniscus pallidulus Budde-Lund M.

5, pigmentatus Budde-Lund M.

16. Setaphora ovata, n. sp. 8.

17. mS pallidemaculata, n. sp. 8.

18. Aphiloscia annulicornis (Budde-Lund) M.

19. Lngia exotica Roux C.

20. Tylos minor Dollfus_ 8.

Among these twenty species the half, 10 species, above marked with “8,” are

peculiar to Seychelles ; four species marked with ‘“‘C” may be considered as cosmopolitan ;

and six species marked with an ‘‘M” are common to these islands and Madagascar, being

regarded as certainly introduced from that country.

It is not only the large number of peculiar species that gives to the fauna of Seychelles

its particular stamp. It is rather the character of the species; thus there are three

species of a new genus, Mahehia, of which no representative is known from anywhere else,

and two species of a genus Pseudophiloscia, of which species are not found nearer than

New Zealand, Upolu, Chile. The species of Spherillo and Setaphora only point to a

connection with the Australasian Islands, while no form points to any connection with

Africa, Madagascar being excepted.

From Mauritius are known the following ten species :

1. Sunniva minor Budde-Lund.

2. Spherillo testudinalis (Budde-Lund).

47—2

370 PERCY SLADEN TRUST EXPEDITION

Spherillo collaris Budde-Lund.

ie parvus Budde-Lund.

Angara lenta Budde-Lund.

Pagana dimorpha Dollfus.

» maculosa Budde-Lund.

» jissifrons Budde-Lund.

9. Metoponorthus pruinosus Brandt.

oN Oo fF yw

10. Aphiloscia annulicornis Budde-Lund.

Four species, nos. 1, 3, 6, 7, are known only from Mauritius. The other six species

are found in Madagascar and the East Indies.

In my paper on the Isopoda from Madagascar (Budde-Lund (5)) I have recorded

32 species as inhabiting that large island.

L. A. Borradaile in his paper on the Land Crustaceans in the Fauna: Maldives and

Laccadives, vol. i., p. 28, has recorded six species from those islands :

Ingia exotica Roux.

Porcellio maldivensis Borradaile= Agnara madagascariensis Budde-Lund ?

Alloniscus maldivensis Borradaile = Alloniscus pigmentatus Budde-Lund ?

Philoscia gracilis Budde-Lund ? = Setaphora sp.

‘i sp.

Cubans murina. Brandt.

The descriptions of the new species given by Borradaile are very superficial* and

apply to many different species, being without essential characters.

Besides the Isopoda collected by the Sealark Expedition Mr Thomasset during

a sojourn at the Aldabra Islands has taken a new species, Zura angusta, which I on this

oceasion describe together with the other species of this genus.

This small collection of the Isopod-Fauna confirms the conclusion I have drawn

(Budde-Lund (2), p. 40) that the Seychelles Islands and East Madagascar are remnants of

a submerged continent, which occupied a large part of the globe, now to a great extent

covered by sea.

While the Seychelles Islands, East Madagascar, Mauritius and Bourbon mark the

occidental outline of this submerged continent, the west coast of South America is its

oriental outline, confined by the Andes mountains; of the countries between these two

outlines some of the East Indian Islands, the Malay Peninsula, East Australia, New

Zealand and the Pacific Islands are remnants. In those times certainly North and South

America were separated, and several of the West Indian Islands (Cuba, Porto Rico and

Jamaica) were belonging to a submerged continent.

* Tt should be remembered that Borradaile’s paper was published in 1901 before the dawn of that new era,

in which, as a comparison of Herr Budde-Lund’s earlier and later writings clearly testifies, the terrestrial

Tsopoda have been enabled to claim a far more searching analysis than in earlier times they were accustomed

to receive.

BUDDE-LUND—TERRESTRIAL ISOPODA 371

Another more recent connection has existed between West Africa and South America

and between South Africa and West Australia.

Familia Oniscide.

Onisci Budde-Lund (1), p. 18, 1885.

Subfamilia Spherilloninze Budde-Lund (2), p. 41, 1904.

Included in this subfamily are a number of genera, Spherillo, Sunniva, Saidjahus,

Scleropactes, Suarezia, Arhina, Pseudophiloscia, Ambounia, Pseudarmadillo, Acantho-

niscus and Anaphiloscia.

I have earlier given the reasons for joining these genera in a subfamily. Of the

above-named genera the Sealark Expedition has brought back species of the genera

Spherillo, Pseudophiloscia, and a new genus Mahehia.

Genus SPHERILLO Budde-Lund (2), p. 51 Dana.

(UsS) Expl, Hxp., vol. xii, p. 719, 1853.)

Five species of this genus are found in the Islands of the Indian Ocean. Two of

them are only known from Seychelles, one only from Mauritius, the other species are of

wide distribution eastwards.

1. Spherillo parvus.

Armadillo parvus Budde-Lund (1), p. 25.

Spherillo parvus Budde-Lund (2), p. 91; B.-L. (5), p. 270. Taf. 12, fig. 30—37.

Distribution. Seychelles Archipelago: Mahé, 1600 feet, many specimens; Mt.

Harrison at an altitude of 2000 feet; Trois fréres, 1500 feet, 17 Nov. 1905: Silhouette

a single specimen: Praslin on dry hills, five specimens. Desroches, very abundant. Coetivy,

seven specimens. Chagos Archipelago at Coin, Peros, and at Egmont, many specimens.

This species was taken many years ago in Seychelles by Prof. Mobius ; later M. Ch.

Alluaud found it at Mahé, at Praslin and in Madagascar ; also specimens were obtained

from Mauritius. In the British Museum, London, are preserved specimens from Cocos-

Keeling Island, taken in July 1902 by Mr Wood-Jones.

2. Spherillo purpurascens, n. sp.

Cubaris officinalis Stebbing, Willey’s Zool. Results, 1900, p. 655.

Oculi mediocres, ocelli magni, numero 13.

Antennarum articulus 1 flagelli duplo brevior quam articulus 2.

Trunci segmentum 1 margine laterali crasso, per totam longitudinem sulcato, post

inaequaliter sulcato: lacinia exterior multo major quam lacinia interior ; margo posterior

utrinque leviter incurvus. Segmentum 2 epimeris ante fissis, lacinia interiore brevi,

obtusa; pronotum fere quart parti dorsi longitudine squale ; margo posterior utrinque

levissime incurvus.

372 PERCY SLADEN TRUST EXPEDITION

Uropodum endopoditum apicem telsi non attingens ; exopoditum minutum, non, nisi

desuper, visibile, in fossa laterali scapi positum.

Color fusco et flavo variegatus ; interdum fuscus maculis pallidis notatus.

Lg. 13 mm.

Distribution: Isle of Pines ; South of New Caledonia.

[Spherillo purpurascens is certainly a new species. In the manuscript of the late

Mr Budde-Lund, however, this was not expressly stated. |

3. Spherillo collaris.

Spherillo collaris Budde-Lund (2), p. 60, 1904.

Mauritius (Mus. Paris).

4. Spherillo peltatus.

Spherillo peltatus Budde-Lund (2), p. 78, 1904.

Seychelles Archipelago (Mus. Hamburg).

5. Spherillo testudinalis.

Armadillo testudinalis Budde-Lund (1), p. 29, 1885.

Spherillo r Budde-Lund (2), p. 80, 1904.

Mauritius (Mus. Paris). This species is spread over the greatest part of the Asiatic

and Australian islands ; also found in Madagascar.

6. Spherillo maculosus.

Spherillo maculosus Budde-Lund (2), p. 80, 1904.

Seychelles Archipelago, Mahé (Mus. Hamburg).

Genus PsEupopHitoscta Budde-Lund (2), p. 42, 1904.

The discovery in the Seychelles of the two new species described below is very

interesting and corroborates my hypothesis concerning ancient continental lands.

I have before recorded three species in this genus: Pseudophiloscia gracilis (Budde-

Lund) (1), p. 220 and (2), p. 42 from Upolu Island; Pseudophiloscia fragilis Budde-Lund (2),

p. 43 from New Zealand; Pseudophiloscia infleca Budde-Lund (2), p. 43 from Chili, I |

should also think the Paraphiloscia stenosoma Stebbing*, from New Britain, to be a

Pseudophilosciat, whereas the Philoscia gracilis Borradaile{ from the Maldives is certainly

not identical with Ph. gracilis Budde-Lund but rather a Setaphora.

7. Pseudophiloscia lateralis, n. sp. (Plate 20, figs. 1—6.)

Philoscoa mina Dollfus (1), p. 188 (neque Budde-Lund), 1893.

* Stebbing, Willey’s Zool. Results, 1900, p. 648.

{ In agreement with this opinion it should be conceded that Psewdophiloscia Budde-Lund, 1904, becomes

a synonym of Paraphiloscia, Stebbing, 1900, and that Budde-Lund’s three species above named should

consequently be transferred to the latter generic name.

{ L. A. Borradaile, Land Crustaceans, Gardiner’s Fauna Maldives and Laccadives, i. p. 98.

EE ee

BUDDE-LUND—TERRESTRIAL ISOPODA 373

Superficies subleevis, nitida, setis minutissimis sparse munita.

Oculi magni, angulos anticos capitis utrinque occupantes ; ocelli numerosi, densissime

congregati, numero plus quam viginti.

Antenne fere tres quartas partes corporis longitudine zquantes; scapi articulus 2

paulo longior et crassior quam articulus 3; articulus 4 plus duplo longior quam articulus

3, articulus 5 quarta parte longior quam articulus 4. Flagellum paulo longius quam

articulus 5 scapi, articulus 1 longior quam articuli 2 et 3 subzequales simul sumpti.

Maxille prioris paris lamina exterior dentibus 4 (secundo ceteris multo minore) + 6

(omnibus apice fissis, subzequalibus).

Frons ante non marginata. Epistoma linea transversa in medio leviter procurva.

Trunci segmenta 1, 2 margine posteriore curvato, segmenta 3, 4 margine posteriore

subrecto, segmenta 5, 6 leviter segmentum 7 profunde in medio incurva; anguli postici

segmentorum 1—4 rotundate obtusi, segmentorum 5—6 subrecti, segmenti 7 rotundate

truncati. Segmentum 2 pronoto quarta parte dorsi vix longiore, wgre discreto, utrinque

angulos priores laterales segmenti occupante.

Cauda trunco abrupte angustior; omnia segmenta, preesertim segmenta 4 et 5

magna.

Telsum triangulum, lateribus leviter incurvis, post late rotundatum.

Uropodum scapus multo longior quam latior, latere exteriore profunde canaliculato ;

processus endopoditi non brevior quam scapus; exopoditum duplo longius quam scapus ;

endopoditum gracile, paulo longius quam scapus.

Color fuscus, in medio trunco maculis et striis oblongis crebratus ; segmenta trunci

macula laterali rotunda albida, etiam anguli postici segmentorum perlucente albidi.

Long. 8mm. Lat. 3°5 mm.

Distribution. Seychelles Archipelago: many specimens of this species were

obtained during the Sealark expedition: Montagne Alphonse, Cascade, 1800 feet; summit

Mt. Sebert ; Silhouette. In the Museum at Hamburg are preserved specimens taken by

Dr A. Brauer in Mahé, 2—8 May, 1901. It had already been taken in the year 1892

by M. Ch. Alluaud at Mahé, Marianne and Praslin; Dollfus referred it wrongly to

Philoscia mina Budde-Lund. I have seen the original specimens in the Museum at Paris.

8. Pseudophiloscia angustissima, n. sp. (Plate 20, figs. 7—10.)

Superficies levis, nitidissima.

Oculi mediocres, angulos anticos capitis utrinque occupantes; ocelli minuti, sub-

confluentes.

Antenne duas corporis partes longitudine subsquantes; scapi articulus 2 non

longior quam articulus 3, articulus 4 fere duplo longior quam articulus 3, articulus 5

quarta parte longior quam articulus 4. Flagellum scapi articulo 5 longitudine zequale.

Maxille prioris paris lamina exterior dentibus 4 (dens primus posterior longissimus,

2 longus, 3 et 4 parvi) + 6 (dens 1 longus, 5 parvus, ceteri mediocres, omnes acuti,

integri).

374 PERCY SLADEN TRUST EXPEDITION

Frons ante non marginata. Epistoma linea transversa recta, infra inter antennulas

tuberculo ovali, minuto.

Trunci segmenta 1, 2, 3 margine posteriore curvato, segmentum 4 subtransversum,

segmenta 5, 6 levissime, segmentum 7 fortius medio incurvo; anguli postici segmentorum

1, 2, 3 late rotundate obtusi, anguli segmentorum 4, 5, 6 rotundate subrecti, segmenti

7 acutiores.

Cauda trunco abrupte angustior; segmenta angusta post sensim longiora; 1, 2, 3

breviora, 4, 5 longa; epimera inflexa, brevia, non post retroducta.

Telsum plus duplo latius quam longius; basis brevis, transverse rectangula; apex

brevis, triangulus, lateribus levissime incurvis, post obtusior.

Uropodum scapus manifesto longior quam latior, latere exteriore late et profunde

per longitudinem canaliculato ; processus endopoditi nonnihil brevior quam scapus.

Color e fusco griseus maculis et striis crebris albescentibus ornatus.

Long. 5mm. Lat. 1°5 mm.

Distribution. Seychelles Archipelago: Mahé; Mt Alphonse, 3 Dec. 1905, 3

specimens. The Museum at Hamburg possesses 7 specimens taken by Dr A. Brauer,

2 May, 1901.

9. Pseudophiloscia brevicornis, n. sp. (Plate 20, figs. 11—16.)

Superficies minute et densius hirsuta, nitida.

Oculi minores ; ocelli pauci, numero 9—10.

Antenne breviores, tertiam partem corporis longitudine vix eequantes ; scapi articuli

ad apicem versus gradatim longiores; flagellum scapi articulo 5 longitudine subeequale,

articulo primo ceteris longiore.

Maxille prioris paris lamina exterior dentibus 2 (dens prior postremus longissimus,

validus) + 4 (dens 2 ceteris subzequalibus nonnihil longior, omnes acuti, integri).

Frons ante non marginata. Epistoma linea transversa tenui, recta, infra inter

antennulas transverse elevatius.

Trunci segmenta 1—4 margine posteriore curvato, segmentum 5 margine posteriore

subtransverso, segmenta 6 et 7 margine posteriore in medio leviter incurvo; anguli

postici segmentorum 1—5 rotundate obtusi, anguli postici segmenti 6 subrecti, anguli

postici segmenti 7 acutissimi, apice retroducto.

Cauda trunco non abrupte angustior; segmenta 1—5 lata, subeeque longa, epimeris

minutis, adpressis.

Telsum plus duplo latius quam longius, post rotundate triangulum.

Uropodum scapus paulo longior quam latior, latere exteriore late et profunde per

longitudinem sulcato ; processus endopoditi nonnihil brevior quam scapus. Exopoditum

semiplice longius quam scapus, apice stylis longissimis ornatum. Endopoditum vix

longius quam scapus, apice stylis longis ornatum.

Color flavus crebre fuscomaculatus, in epimeris fuscis macula rotunda flava; antennee

albescentes.

BUDDE-LUND—TERRESTRIAL ISOPODA 375

Long. 7°5 mm. Lat. 1°5 mm.

Distribution. New Zealand, Auckland. I have examined a few specimens sent by

Mr Suter to the Museum at Hamburg under the name Oniscus punctatus Thoms. This

adds a second species to the New Zealand fauna and a sixth species to the genus, which

ranges from Seychelles to Chili.

MAHEBIA, nov. gen.

Antennarum flagellum 2-articulatum.

Pleurz capitis concrete ; linea marginalis verticalis utrinque ante oculos producta,

marginem frontalem attingens.

Trunci segmentum primum epimeris integris, infra dente longo, acuto instructis.

Pleopodes omnium parium tracheis instructi.

Telsum triangulum, apice truncato aut acuto.

Uropodes longi, producti; exopoditum longum.

Utrum adsit necne folliculus abdominalis sive marsupium, nescio.

10. Mahehia maculata, n. sp. (Plate 20, figs. 17—25.)

Superficies capitis et segmentorum priorum trunci maxime segmenti primi subtiliter

et sparse granulata, praesertim in lateribus, post subleevis, nitidissima.

Oculi magni, ocelli numero ec. 23.

Antenne longissime, fere 8 corporis longitudinem superantes ; scapi articulus 1,

brevissimus, articulus 2 brevis, crassior, articulus 3 fere triplo longior quam articulus 2,

articulus 4 paulo longior quam articulus 3 et gracilior, articulus 5 nonnihil longior quam

articulus 4 gracillimus. Flagellum gracillimum, duas partes scapi articuli 5 longitudine

zequans, articulo priore plus duplo breviore quam articulo altero; articulus alter seta

apicali instructus.

Frons ante marginata, utrinque lobata; lobi laterales minores, rotundati, linea

marginalis crassior in medio leviter procurva; frons utrinque intra lobos laterales tuberculo

oblongo, parvo, obliquo instructa. Epistoma convexum, in medio carinis duabus curvatis

se attingentibus, a margine frontali ad clypeum ductis, munitum. Tubercula antennaria

majora, acutiora, exteriora.

Trunci segmentum 1 post marginem anteriorem sulco profundo per transversum

ducto; margo posterior utrinque profunde incurvus, angulis lateralibus acutissimis,

retroductis ; epimerum infra procul a margine laterali dente longo, acuto instructum.

Segmentum 2 pronoto magno, plus tertiam partem dorsi occupante ; margo posterior

subtransversus, angulis lateralibus rotundate obtusis.

Caude segmenta 3, 4, 5, epimeris magnis ; epimera segmenti 5 lateribus interioribus

pavallelis, telso paulo brevioribus. Pleopodes primi paris in utroque sexu parvi, inter se

longe distantes.

Telsum triangulum ; paulo, fere quinta parte latius quam longius, lateribus leviter

incurvis, apice obtusiore, supra per medium ad longitudinem impressum.

SECOND SERIES—ZOOLOGY, VOL. XV. 48

376 PERCY SLADEN TRUST EXPEDITION

Uropodum exopoditum plus quam dimidio longius quam scapus.

Color e nigro fuscus ; in trunci segmentis macule senze aut octonz parvee rotund in

seriem transversam, in caudee segmentis macule quaternee aut senze sepe evanide posite ;

antennee nigree.

Long. 19mm. Lat. 8 mm.

Distribution. Seychelles Archipelago. I have seen four specimens of this species

from Mahé. Two specimens were taken during the Sealark expedition, 3 December

1905; the other two, preserved in the Museum at Hamburg, were found by Dr Brauer,

2 May 1900.

11. Mahehia laticauda, n. sp. (Plate 20, fig. 26; plate 21, fig. 1—6.)

Superficies trunci medii sparse granulata, epimerorum segmentorum trunci et cauda

dense squamata.

Oculi majores vel magni; ocelli numero ec. 14, posteriores ceteris majores.

Antenne graciles, longiores, dimidio corpore paulo longiores; scapi articulus 1

brevissimus, articulus 2 brevis, subglobosus, articulus 3 duplo longior quam articulus 2,

articulus 4 tertia parte vel plus longior quam articulus 3, articulus 5 quarta parte longior

quam articulus 4, gracilis. Flagellum gracile, paulo longius quam dimidium articuli 5

scapi, articulo priore plus duplo breviore quam articulo altero, seta apicali instructo.

Frons ante marginata, utrinque lobata, lobi laterales minores, oblique rotundati, linea

marginalis ad mediam frontem fortius procurva. Epistoma in medio convexum, supra

eminentia semicirculata marginata infra et ad latera excavatum.

Trunci segmentum 1 sulco transverso collari minus profundo; margo posterior

utrinque levius incurvus, angulis lateralibus acutis, non retroductis; epimerum infra procul

a margine laterali dente longo, acuto instructum. Segmentum 2% pronoto magno, margo

posterior levissime utrinque incurvus. Segmenta 2—7 epimeris magnis, tetragonis, paulum

obliquis, angulis lateralibus subrectis.

Caudz segmenta 3, 4 epimeris permagnis; epimera segmenti 5 valida, oblique

tetragona, lateribus interioribus subparallelis.

Telsum trapezoidale vel triangulum apice late truncato, paululo (septima parte) latius

quam longius.

Uropodum scapus dimidio longior quam latior, exopodito pene dimidio longior.

Subunicolor, grisea, seepe decolorate pallida; antennarum articulus 5 scapi parte

apicali albida.

Long. 13mm. Lat. 7°5 mm.

Distribution. Seychelles Archipelago: Mahé; many specimens taken on “ Montagne

Alphonse, Cascade, 1800 feet,” in the days 30 Nov., 2 Dec., 4 Dec. 1905: Praslin, three

specimens from 1000 feet under dead palm leaves.

12. Mahehia bicornis, n. sp. (Plate 21, figs. 7—11.)

Tota superficies densius et scabrius maxime ad latera et in epimeris trunci

granulata.

BUDDE-LUND—TERRESTRIAL ISOPODA 377

Oculi magni, semiglobosi ; ocelli numero c. 22—23.

Antenne longissime ; scapi articuli et flagellum ut in M. maculata.

Frons ante marginata et utrinque lobata; lobi laterales longiores et angustiores,

subtrianguli, apicibus obtusis, linea marginalis frontalis in medio profundius emarginata,

ut media frons bicornis fiat. Epistoma medium triangulis elevatis, superiore et inferiore

se in medio attingentibus, convexum. Clypeus magnus, declivis, non lobatus.

Trunci segmentum 1 sulco anteriore collari tenui; margo posterior utrinque pro-

fundius incurvus, angulis lateralibus acutissimis, non retroductis; epimerum infra dente

longo, gracili, acuto. Segmentum 2 pronoto magno. Segmenta 2—7 margine posteriore

utrinque levissime incurvo, angulis lateralibus post sensim acutioribus.

Caude segmenta 3, 4 epimeris magnis; epimera segmenti 5 epimeris precedentibus

angustiora, acute triangula, telso paulo breviora, lateribus interioribus subparallelis.

Telsum triangulum, ejusdem longitudinis atque latitudinis, lateribus levissime

incurvis, apice obtusiore, supra per medium ad longitudinem leviter sulcatum.

Uropodum exopoditum multo longius quam scapus.

Color in medio corpore e nigro fuscus, in epimeris trunci caudeeque flavus ; antennz

flavee vel albidee ; color interdum pulchre purpureus, lateribus anguste albidis.

Long. 16mm. Lat. 8 mm.

Distribution. Seychelles Archipelago: Mahé, one specimen from mountain forest,

Noy. 1905: Silhouette, five specimens. I have also had many specimens for examination,

taken the 2 May 1901 by Dr A. Brauer and preserved in the Museum, Hamburg.

Subfamilia Oniscing, Budde-Lund (1), p. 75.

This subfamily contains the largest number of the known forms of terrestrial Isopods.

In nearly sixty genera are contained about one thousand species, Authors have produced

an abundance of new species on very superficial descriptions. These are very often

quite incorrectly placed, because the external characters on which the affinities are

founded are often without any value.

I have lately in a paper ((7), p. 8) given hints, which should certainly lead to the

understanding of the affinities between the numerous genera. By later examinations

of the given characters and of other new ones, I have reached so far as to think that

I can give a survey of the genera, not only useful for determination but also in the main

points in accord with a natural system.

Subgenus Cusparis Brandt, Bull. Soc. Nat. Moscou, vol. vi. p. 189, 1833.

Budde-Lund (6), p. 54, 1909.

13. Cubaris murina.

Cubaris murina Brandt, Conspectus, p. 28, 1833.

Armadillo murinus Budde-Lund (1), p. 27; (2), p. 119. Tab. X. figs. 20—22.

Cubaris murina Budde-Lund (6), p. 54.

48—2

378 PERCY SLADEN TRUST EXPEDITION

Seychelles Archipelago: Silhouette and Curieuse Island very abundant: Praslin,

Cascade, 700 ft.; Mahé, on Mt. Harrison, alt. 2000 ft.; Trois Fréres, 1500 ft., the 17th

Nov. 1905: Desroches, very common in sand hills. Already Prof. Mobius had taken this

species in the Seychelles, also M. Ch. Alluaud in Mahé and Marianne (sec. Dollf.).

Specimens from Mahé are also preserved at the Museum, Hamburg, found by Dr A.

Brauer.

Concerning the wide distribution of this species, consult the /.c., 2, p. 119, where all

the hitherto known localities are mentioned. I can add that specimens have been

obtained from Cocos-Keeling Island (Mr Wood-Jones in Museum, London).

Genus Porcetyio Latreille, Hist. Nat. Crust. et Ins., vol. vii., p. 45, 1804.

Budde-Lund (5), p. 280.

Subgenus Tura Budde-Lund (5), p. 282, 1908.

During his stay at the Aldabra Islands in 1907, Mr H. P. Thomasset took several

specimens of a little new species belonging to this genus. ‘Till then I knew only one

species, also from the Aldabra Islands, taken by Prof. Voeltzkow, who had secured it also

in N. Madagascar. Subsequently I have seen two more new species from Abyssinia ; later

on I give a review of all these nearly related species.

14. Tura angusta, n. sp.

Superficies squamis minutissimis dense obtecta.

Frons cum epistomate superiore leviter producta, crista squamarum minutissimarum

ante marginata ; processus laterales minores, late rotundati.

Trunci segmenta 1, 2, 3 margine posteriore curvato, segmentum 4 margine posteriore

subrecto, segmenta 5, 6, 7 margine posteriore in medio fortius incurvo; anguli laterales

posteriores segmentorum 1, 2, 3 late rotundate obtusi, segmenti 4 rotundate subrecti,

seomentorum 5, 6, 7 acutiores.

Caudze epimera segmentorum 8, 4, 5 longiora, angusta, acuta, subadpressa.

Telsum breve, triangulum, epimera segmenti 5 satis superans, lateribus fortiter

incurvis, apice acutissimo.

Color e fusco brunneus, obscure pallide maculatus.

Long. 455mm. Lat. 2 mm.

Distribution. Aldabra: several specimens (H. P. Thomasset).

15. Tura testacea,

Tura testacea Budde-Lund (5), p. 282. Tab, 14, fig. 1—14, 1908.

Superficies squamis minutis dense obtecta.

Frons media cum superiore epistomate leviter bulbose producta, ante obscure

marginata ; processus laterales rotundate obtusi.

Trunci segmenta 1, 2, 3 margine posteriore curvato, segmenta 4—7 margine

posteriore in medio leviter incurvo; anguli laterales posteriores segmentorum 1, 2, 3

BUDDE-LUND—TERRESTRIAL ISOPODA 379

late rotundate obtusi, segmenti 4 rotundate subrecti, segmentorum 5, 6, 7 acutiores,

subrecti.

Caudee epimera segmentorum 3, 4, 5 breviora, latiora, distantia.

Telsum breve, triangulum, duplo latius quam longius, epimera segmenti 5 nonmihil

superans, lateribus leviter incurvis, apice acutiore.

Unicolor, testaceus.

Long. 6—7 mm. Lat. 3—3°7 mm.

Distribution. Aldabra. Majunga in W. Madagascar (Museum, Berlin).

16. Tura albipennis, n. sp.

Superficies squamis minutissimis sparsius obtecta.

Frons ante leviter producta, ab epistomate linea squamarum minus manifesto

discreta ; processus laterales majores, oblique rotundati.

Trunci segmentum 1 margine posteriore curvato ; segmenta 2—3 margine posteriore

subrecto vel levissime curvato; segmenta 4—7 margine posteriore post sensim in medio

magis incurvo; anguli laterales posteriores segmentorum 1, 2, 3 rotundate obtusi,

seomentorum 4—7 acuti.

Caude segmentorum 3, 4, 5 epimera latiora, acuta, distantia.

Telsum late triangulum, epimera segmenti 5 nonnihil superans, lateribus leviter

incurvis, apice acuto.

Uropodum scapus telso multo brevior; exopoditum breve, vix duplo longius quam

latius.

Unicolor e flavo brunneus; antenne albe.

Long. 7mm. Lat. 4 mm.

Distribution. Abyssinia, near Harrar and at Dire-Danah, 5 specimens taken by

Herr E. Wache preserved in the Museum, Hamburg.

17. Tura laticauda, n. sp.

Superficies squamis crassioribus densissime obtecta.

Antennarum scapi articuli ad longitudinem sulcati.

Frons ante cum superiore epistomate fortius producta et marginata; processus

laterales majores, prominentes, latere interiore rotundato ; epistoma convexum, infra linea

transversa obscuriore in medio procurva munitum.

Trunci segmenta 1, 2 margine posteriore curvato, segmentum 3 margine posteriore

subrecto, segmenta 4—7 margine posteriore post sensim in medio magis incurvo ; anguli

laterales posteriores segmentorum 1, 2 late rotundati, segmenti 3 rotundate subrecti,

segmentorum 4—7 post gradatim acutiores.

Caudz epimera segmentorum 3, 4, 5 breviora, latiora, distantia.

Telsum breve, triangulum, epimera segmenti 5 vix superans, lateribus fortius incurvis,

apice acuto.

Unicolor, e testaceo fuscus.

380 PERCY SLADEN TRUST EXPEDITION

Long. 5°5—6°5 mm. Lat. 3°2—3°5 mm.

Distribution. Abyssinia, Rio Faressa (Mission du Bourg de Bozas de Feltner, Juin

1901, 4 specimens in Museum, Paris); Arussi Galla, at Aduabeba in “ Hanasch Thal,” 2

specimens (O. Neumann in Museum, Berlin).

Perhaps the following species belongs to this genus: Leptotrichus inquilinus Koelbel,

Wasmann, Verzeichn. myrmecoph. u. termitoph. Arthrop. Berlin, 1894, p. 221; from

Somaliland.

Subgenus Pacana Budde-Lund (5), p. 287, 1908.

18. Pagana dimorpha.

Metoponorthus dimorphus Dollfus, Mém. Soe. Zool. Fr. viil., p. 184, 1895.

Pagana dimorpha Budde-Lund (5), p. 288, Taf. 15, fig. 1—10.

Seychelles Archipelago. I have only seen the rudiments of a single specimen from

“Baie Praslin, 1876,” taken by M. de I'Isle (Mus. Paris). The species is also found at

Réunion and Mauritius.

The other two known species of the genus, Pagana maculosa, Budde-Lund (5), p. 288,

and P. fissifrons, Budde-Lund (5), p. 289, are found only in Mauritius.

Subgenus ANGARA Budde-Lund (4), p. 5, 1908.

19. Angara lenta.

Lyprobius lentus Budde-Lund (1), p. 230.

Leptotrichus lentus Dollfus, Mém. Soc. Zool. Fr., ix. 542, 1896.

Angara lenta Budde-Lund (4), p. 7, Tab. 1, fig. 1—16.

The expedition has brought back specimens from the following localities : Cargados

Islands, 5 specimens: Coetivy Island, 1 specimen: Desroches Atoll, 5 specimens.

This species seems to be cosmopolitan. I have seen specimens from Italy, Algeria,

Egypt, Greece at Mykene (17. III 1905, Dr R. Schiitt in Mus. Hamburg), Port au

Prince (7. V. 1894, 1 specimen in Mus. Hamburg), Progreso (20. X. 1905, 1 specimen,

physician C. G. Budde-Lund), Mauritius (Dr Emmery, in Mus. Paris), Chester (Mr

Beresford).

Subgenus MeroponortHus Budde-Lund 1879.

20. Metoponorthus pruinosus.

Porcellio pruinosus Brandt, Consp., p. 19.

Metoponorthus pruinosus Budde-Lund (1), p. 169.

This cosmopolitan species, spread world-wide, inhabits most of the islands of the

Indian Ocean. The Sealark Expedition brought back specimens from the following

localities: Chagos Archipelago: Coin, Peros; Salomon; Egmont; Diego-Garcia. Car-

gados Archipelago, Siren Island, very abundant. Farquhar, 30 Sept. 1905. Amirante

Archipelago, Eagle Island, 17 Oct. 1905. Seychelles Archipelago: Praslin; Mahé,

Trois Fréres, at an altitude of 1500 feet, and Mt. Harrison, 2000 feet; Bird Island.

Coetivy.

BUDDE-LUND--TERRESTRIAL ISOPODA 381

Subgenus AcNaRA Budde-Lund (5), p. 286, 1908.

21. Agnara madagascariensis.

Metoponorthus madagascariensis Budde-Lund (1), p. 189.

Agnara madagascariensis Budde-Lund (5), p. 286. Taf. 14, figs. 48—54.

Farquhar Island, 30 Sept., 1905, a few specimens. This species seems not to be rare

in North Madagascar.

Subgenus BerHatus Budde-Lund (6), p. 54, 1909.

22. Bethalus simplex (Plate 21, figs. 12—15).

Armadillo simplex Dollfus, Mém. Soc. Zool. Fr., viii. 180, text-fig. 1, 1895.

a 5 Budde-Lund (2), p. 132.

Distribution. Only two defective specimens were taken at Farquhar, 30 Sept.

Certainly this species was imported from Madagascar, where found by M. Charles Alluaud

on “ Montagne d’Ambre.”

To supplement the description given by Dollfus, /.c., I add a few essential characters ;

T also give drawings of other characteristic and instructive features.

Trunci segmentum 2 pronoto fere quintam partem dorsi zquante.

Pleopodes primi paris feminz parvi, inter se longe distantes, area operculari subnulla.

Subgenus Nacara Budde-Lund (5), p. 284, 1908.

23. Nagara cristata.

Porcelhio cristatus Dollfus, Notes fr. Leyden Mus., xi., 1891, Taf. v. fig. 2.

Nagara cristata Budde-Lund (5), p. 284, Taf. 14, figs. 27—39.

Seychelles Archipelago; eight specimens, all females, were collected at Mahé, at an

altitude of 1600 feet.

This species is obtained also in Madagascar and seems to be widely spread over the

countries within the warm zone. I have never seen a male specimen of this species.

24. Nagara nana.

Nagara nana Budde-Lund (5), p. 285, Taf. 14, figs. 40—47.

Seychelles Archipelago: one specimen was found at Praslin, dry hills; in the museum

of Paris is also one specimen from Praslin. Chagos Archipelago: two specimens from

Egmont, and four specimens from Coin, Peros.

Formerly, this species was only known from Madagascar ; lately I have seen

specimens from Java (Buitenzorg 24. II. and 2. IIL, Tjibodas 25. III. 04, Prof. K.

Kraepelin in Mus. Hamburg), Singapore (Mus. Hamburg), Ceylon at Mahavaliganga

(Dr G. Duncker 16. VIII. 09, in Mus. Hamburg), Formosa at Takao (Dec. 07, Mr H.

Sauter in Mus. Hamburg). The species seems to be widely spread.

382 PERCY SLADEN TRUST EXPEDITION

Genus TricHoRHINA Budde-Lund (5), p. 293, 1908.

The species of Trichorhina are tiny Isopods, not exceeding 2—3 mm. in length ; it is

only natural, therefore, that they should often escape being taken by naturalists, most

likely because of their likeness to young ones of other Isopods.

The Sealark Expedition brought back a rather large number of specimens of a species,

which I class in this genus ; while most of the characters of this species are confluent with

the characters of the genus, given in the above-cited paper, the first pair of maxille

presents a remarkable variation as to the teeth.

Such differences as to this pair of the trophi I have also observed in other species

belonging to this group of Isopods, and I give a review of the species known by me, based

on these relations.

Besides that the whole surface of the animal has a characteristic cover of tiny

setaceous scales, found on all the species ; an essential character may also be had from the

mandibles, the inferior seta having only two or three branches and the interior lobe of the

left mandible having a row of small papillee (Plate 21, fig. 18).

Together with the small species from the Siren Island, Cargados, brought back by

the expedition, I describe below another new species from Mauritius. Many years ago I

got a single small specimen of a species for which I could find no place in my system until

now ; it was brought to Denmark on a sailing ship carrying a cargo of sugar.

CoNSPECTUS SPECIERUM.

Maxille prioris paris lamina exterior :

a. Dentibus 4+ 5 (dentes 1, 2 apice fisso, dentes 3, 4, 5 serrati).

1. Trichorhina minutissima, n. sp.

2. Trichorhina micros, n. sp.

aa. Dentibus 4+4 (dentes 1, 3 apice fisso, dentes 2, 4 integri).

3. Trichorhina albida Budde-Lund (5), p. 294, Taf. 17, figs. 5—8.

aaa. Dentibus 3+ 4 (dentes 1, 2, 3 apice fisso, dens 4 integer).

4. Trichorhina tomentosa Budde-Lund.

5. Trichorhina quisquiliarum Budde-Lund.

The two first species, 7’. minutissima and T’r. micros, I describe below. Of Tr, albida

I have only seen one specimen, described in the cited treatise, and I cannot add any new

point, whereas I give below new descriptions of the two species 7'’r. tomentosa and Tr.

quisquilianum, which I earlier described and placed in the genus Allonescus.

Alloniscus papillosus Budde-Lund, Entom. Medd. 1893, p. 193 and Allonascus

ambiguus Budde-Lund, ibid., p. 124, both species from Venezuela, which I referred

(Budde-Lund (5), p. 293) to the genus Trichorhina, are in the mouth-parts so different

from this genus, that I now place them in a new genus, (redania, which has several

representatives, not yet described, in South America. However I should think that

the Platyarthrus simont Dollfus (Ann. Soc. ent. Fr., lxii., p. 342) from Venezuela is a

Trichorhina.

i Nr a eae

BUDDE-LUND—TERRESTRIAL ISOPODA 383

25. Trichorhina minutissima, n. sp. (Plate 21, figs. 16—24).

Superficies squamis minutis et setis minutissimis in marginibus clavatis dense

obtecta.

Oculi parvi; ocelli numero 6—7, fortius nigropigmentati.

Antennz breviores, scapi articuli 2, 3, 4 subzeque longi, articulus 5 ceteris paulo

longior ; flagellum articulo 5 scapi vix brevius; articulo priore duplo vel plus breviore

quam articulo altero.

Frons ante marginata; linea marginalis utrinque ante oculos paulum producta ;

epistoma supra convexum, infra inter antennulas tuberculo semicirculato.

Trunci segmentum 1 margine posteriore fortius curvato, segmentum 2 margine

posteriore levius curvato, segmenta 3 et 4 margine posteriore subtransverso, segmenta 5 et

6 margine posteriore in medio leviter incurvo, seomentum 7 margine posteriore in medio

fortiter incurvo. Anguli laterales posteriores segmentorum 1, 2, 3, 4 rotundate obtusi,

anguli laterales posteriores segmentorum 5, 6, 7 rotundate subrecti.

Caude segmenta 3, 4, 5 epimeris mediocribus, segmentorum 3 et 4 acutioribus,

segmenti 5 obtusioribus.

Telsum triangulum, lateribus leviter incurvis, apice acuto, epimera segmenti 5 paulum

superans.

Uropodum scapus telso brevior, latere exteriore ad longitudinem fisso ; exopoditum

plus duplo longius quam scapus, teres, latere exteriore ad longitudinem suleato ; endopo-

ditum satis brevius et multo tenuius quam exopoditum.

Unicolor, albida.

Long. 2°5-—3 mm. Lat. 1—1°25 mm.

Distribution. Cargados; several specimens were taken in Siren Island during the

Sealark Expedition.

26. Trichorhina micros, n. sp. (Plate 21, figs. 25—27).

Superficies squamis clavatis minutissimis sparsius obtecta.

Oculi parvi; ocelli pauci, numero c. 3—4, zegre pigmentati.

Antenne...

Frons ante marginata; linea marginalis tenuis in medio leviter producta; frons

utrinque in processum obtusum producta; epistoma convexum, supra linea elevata trans-

versa in medio procurva, inter processus laterales frontales ducta, infra inter antennulas

tuberculo oblongo parvo, in medio coarctato instructum.

Trunci segmenta marginibus posterioribus et angulis lateralibus eodem modo fere ut

in Tr. minutissima formatis.

Caudz segmenta 3, 4, 5 epimeris mediocribus, acutioribus, subadpressis.

Telsum triangulum, epimera segmenti 5 paulum superans, quarta parte latius quam

longius, lateribus subrectis vel levissime incurvis.

Uropodum scapus latere exteriore subintegro.

SECOND SERIES—ZOOLOGY, VOL. XV. 49

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384 PERCY SLADEN TRUST EXPEDITION

Color albidus.

Long. 2°3 mm. Lat. 1 mm.

Distribution. Mauritius; I have only seen one specimen belonging to my collection.

27. Trichorhina tomentosa (Plate 22, figs. 1—5).

Alloniscus tomentosus Budde-Lund, Ent. Med. 1895, p. 126.

Bathytropa thermophila Dollfus, Feuil. Jeun. Nat., s. 3, v. 26, p. 94, text-fig. 2,

1896.

Superficies squamis vel setis clavatis minutissimis dense obtecta; margo posterior

capitis et omnium segmentorum trunci caudzeque serie squamarum majorum setis minutis

interpositis munitus.

Oculi simplices, minuti, zegre pigmentati.

Antenne breviores, dimidio corpore breviores ; scapi articulus 4 paulo longior quam

articulus 2; flagellum scapi articulo 5 longitudine quale, articulo priore plus duplo

breviore quam articulo altero. |

Frons linea marginali squamarum clavatarum subrecta, in medio levissime producta,

ab epistomate discreta; processus frontales laterales parvi, rotundati. Epistoma supra

cum fronte productum, linea transversa elevata in medio subrecta utrinque sinuate

recurva, infra tuberculo rotundate tetragono inter antennulas munitum ; clypeus magnus,

porrectus.

Trunci segmentum 1 margine posteriore curvato, segmenta 2, 3 margine posteriore

subrecto, segmenta 4—7 margine posteriore in medio leviter incurvo; anguli postici

laterales segmentorum 1—4 rotundate obtusi, segmentorum 5, 6 subrecti, segmenti 7

acutiores. Segmenta 2, 3, 4, stria suturali manifesta in femina.

Caudee seomenta 3, 4, 5, epimeris majoribus, triangulis, latere exteriore curvato.

Telsum breve, triangulum, duplo vel plus latius quam longius*, epimera segmenti 5

paululum superans, lateribus subrectis, apice obtuso.

Unicolor, albida vel ex albido grisea.

Long. 3—3'5 mm. Lat. 1°3—1°5 mm.

Distribution. Jamaica at Kingston (1905, C. Gagzo in Mus. Hamburg.). Venezuela

(Mus. Kjébenhavn). Ecuador at “ Purnio ob Magdalena” (Birger in Mus. Gottingen) ;

Paris (Dollfus), Haiti, at Port au Prince (Nepperschmidt in Mus. Hamburg.); Kew Garden,

London (Bagnall), Naranjito 9. III. 01 (V. Ortoneda), Guayaquil (F. v. Buchwald,

10. VIII. 03, Mus. Hamburg.).

28. Trichorhina quisquiliarum (Plate 22, fig. 6).

Alloniscus quisquiliarum Budde-Lund, Ent. Med., 1895, p. 125.

Tota superficies densius setis clavatis obtecta ; margo posterior omnium segmentorum

serie papillarum minutissimarum ornatus.

* Dollfus describes the telson as “aussi long que large,” and fig. 5 in pl. 22 of this Memoir

represents it far less than twice as broad as long, with incurved sides.

BUDDE-LUND—TERRESTRIAL ISOPODA 385

Oculi parvi; ocelli pauci, numero c. 6, quorum solum bini pigmentati.

Antenne corporis dimidium longitudine subzequantes ; scapi articuli tres priores inter

se longitudine subzequales, articulus 4 sesqui longior quam articulus 3; flagelli articulus

prior altero fere triplo brevior.

Processus frontales laterales parvi, obliqui; epistoma convexum cum fronte paulum

productum, infra inter antennulas linea transversa sinuata carinatum.

Trunci segmenta duo priora margine posteriore curvato, segmentum 3 margine

posteriore subtransverso.

Caudee segmenta 3, 4, 5, epimeris brevioribus et latioribus.

Telsum breve triangulum, epimera segmenti 5 vix superans, plus duplo latius quam

longius*, lateribus late incurvis™, apice acutiore.

Unicolor, alba.

Long. 2°8—3 mm. Lat. 1°2—1°3 mm.

Distribution. Venezuela.

Attoniscus (Budde-Lund (1), p. 224), Dana, Pr. Ac. Philad. vol. vil., p. 176, 1856.

29. Alloniscus pigmentatus (Plate 22, fig. 7).

Alloniscus pigmentatus Budde-Lund (1), p. 227; (5), p. 297, Taf. 15, figs. 23—38.

Chagos Archipelago: Coin, Peros, three; Egmont, eight specimens. Farquhar,

four specimens, 30 Sept. 1905. Providence, six specimens. Desroches, one specimen.

Aldabra Isl. (H. P. Thomasset). Mahé (Mus. Paris).

This species is very common in Madagascar, and is found in many localities in the

East Indies.

I give a figure of the exterior lobe of the first maxilla, because I have seen that it

bears a little appendix not before observed.

30. Alloniscus pallidulus.

Alloniscus pallidulus Budde-Lund (1), p. 228, 1885.

Anomaloniscus ovatus Dollf. (1), p. 187, text-fig. 2a, b, c, 1893.

Distribution. Seychelles: Mahé (Anse Royale) sec. Dollfus Le.

I have not seen specimens of this species from Seychelles, but I have no doubt that

the specimens described by Dollfus as Anomaloniscus ovatus belong here.

Alloniscus pallidulus is very common in Madagascar; I have seen specimens taken at

“ Fort Dauphin,” ‘‘ Vynang du Maramboro,” ‘‘'Tamatave,” “ bords de la Tarasy,” ‘‘ prés du

lac d’Anongy,” “ Androhomana dans grotte,” “ Baie d’Antongil céte Est” (M. Ch. Alluaud

in Mus. Paris), at Isl. Ste. Marie (Professor Voeltzkow in Mus. Berlin), at Tamatave (Herr

A. O'Swald in Mus. Hamburg). One specimen taken at Fort Dauphin has an extra-

ordinary size, 19 mm. long by 12 mm. broad.

A third species, Alloniscus brevis Budde-Lund, has been taken at the Comoro Islands

(Budde-Lund (5), p. 298, pl. 15, figs. 39, 40); the other species of this genus are indigenous

in the East Indies and Australasia.

* Fig. 6 in pl. 22 does not agree with these characters.

386 PERCY SLADEN TRUST EXPEDITION

Alloniscus maldivensis Borradaile (Land Crustaceans in Gardiner’s Fauna Maldives

and Laccadives, vol. i., p. 98, text-figs. 2, 3a,6, 1901) from the Maldive Archipelago is

scarcely different from All. pigmentatus ; the description gives no information”.

Genus SerapHorA (Budde-Lund (5), p. 290), 1908.

In the quoted paper I have given the provisional characters of this genus which I

have separated from the large genus Philoscia.

Of the species of Phaloscia, registered in Crust. Isop. Terr. only one species, Ph.

angusticauda Budde-Lund (1), p. 216, from “Borneo,” has to be placed in the genus

Setaphora. But of species of Philoscia afterwards described the following belong to

this genus:

Ph. lubricata Budde-Lund (Ann. Mus. Civ. Gen. 5. 2, v. 14, p. 610), from ‘‘ Burmah.”

Ph. comta Budde-Lund (ibid., p. 611), from Burmah.

Ph. ceca Budde-Lund (ibid., p. 611), from Burmah.

Ph. truncatella Budde-Lund (Proc. Zool. Soc. Lond. 1902, p. 379), from ‘ Malay

Peninsula.”

Ph. incurva Budde-Lund (ibid., p. 380), from ‘‘ Malay Peninsula.”

Ph. suarezi Dollfus (Mém. Soc. Zool. France, v. 8, p. 185), from ‘‘ Madagascar, East

Africa,”

Ph. laticeps Bagnall (Ann. and Mag. Nat. Hist., ser. 8, v. 1, p. 429), “ Europe,”

imported? and I dare say also the following:

Ph. truncata Dollfus (Weber, Reise Niederl. Ost. Ind. iv., p. 376), from Celebes and

Flores.

Ph. variegata Dollfus (ibid., p. 377), from Celebes.

Ph. weberi Dollfus (ibid., p. 378), from Sumatra.

Ph. cinctella Dollfus (ibid., p. 378), from Celebes.

Ph. sundaica Dollfus (ibid., p. 379), from Sumatra and Java.

Ph. pallida Dollfus (ibid., p. 380), from Java.

Ph. alba Dollfus (ibid., p. 381), from Celebes.

Ph. lifuensis Stebbing (A. Willey’s Zool. Results, v., 1900, p. 648).

Besides the three new species described below, I know about twenty undescribed

species of the genus Setaphora from different localities, most of them from the Kast Indies

and the Indian islands.

31. Setaphora ovata, n. sp. (Plate 22, figs. 8—13).

Superficies leevis, nitida, vix punctata.

Oculi mediocres, ocelli dense congregati, numero ec. 20.

* The description in fact agrees closely with that given in 1885 without figures by Budde-Lund for his

A. pigmentatus, except that the length of that species is stated to be 10 mm., while the longest specimen

of A. maldivensis measured only 3:5 mm.

BUDDE-LUND—TERRESTRIAL ISOPODA 387

Antenne duas corporis partes longitudine vix equantes (;8;); flagellum scapi articulo

5 non longius, articuli subequilong!.

Caput fere duplo latius quam longius. Frons ante non marginata. Epistoma supra

planum, linea transversa solita in medio paululo procurva.

Trunci segmenta 1 et 2 margine postico valde curvato, segmentum 3 margine postico

leviter curvato, segmenta 4, 5, 6, 7, margine postico medio sensim magis incurvo, Anguli

externi segmenti 1 late rotundati, segmenti 2 rotundate obtusi, segmenti 3 obtusi,

segmenti 4 subrecti, segmentorum 5, 6, 7, sensim acutiores. Segmentum 2 pronoto

4 dorsi non superante, ad latera majore, angulos laterales anticos late occupante.

Cauda corpore non abrupte angustior; segmenta longitudine subzequalia, epimeris

paulum distantibus.

Telsum breve, triplo latius quam longius, triangulum post rotundatum.

Uropodum scapus latere exteriore ad longitudinem canaliculato, processus endopoditi

nonnihil brevior quam scapus.

Color e brunneo violaceus, in dorso spe pallide evanescens, maculis albidis conspersis,

ad latera macula parva rotunda in trunci segmentis 1—7, anguli postici epimerorum szepe

perlucentes ; pedes pallidi, antennz brunnez, radice flavo.

Long. 7°5 mm. Mats 32>:

Distribution. Seychelles, some specimens taken by Dr A. Brauer under palm leaves

at Mahé, 2—8 May 1901.

32. Setaphora pallidemaculata, n. sp. (Plate 22, figs. 14—18).

Superficies leevis, nitida, vix punctata.

Oculi mediocres, angulos anticos capitis utrinque occupantes ; ocelli dense congregati,

numero ¢c. 20.

Antenne tres quartas partes corporis longitudine equantes; flagellum articulo 5 scapi

longitudine equale, articulus 1 articulis 2 et 3 subsequalibus simul sumptis fere longior,

articulus 3 stylo apicali dimidio articulo longitudine subzequali munitus.

Frons ante non marginata. Epistoma supra in medio carina ad longitudinem ducta

leviore, inter margines superiores foraminum antennarum linea tenui elevata transversa

in medio leviter procurva ducta.

Trunci segmentum 1 linea collari simplice, ad angulum anticum segmenti utrinque

ducta, area articulari capitis solum antica minima; margo posterior valde curvatus,

angulis externis late rotundatis ; anguli antici segmenti late rotundate obtusi. Segmentum

2 pronoto 4 dorsi paulum superante, ad latera majore, angulos anticos late occupante ;

margo posterior leviter curvatus, angulis externis late rotundatis. Segmenta 3 et 4

margine postico subrecto vel leviter curvato, angulis externis late rotundatis. Segmenta

5, 6, 7, margine postico medio post sensim magis incurvo, angulis segmenti 5 obtusis,

segmentorum 6 et 7 acutioribus. Stria suturalis epimeri in femina manifesta in segmentis

Pi iy Lhe

388 PERCY SLADEN TRUST EXPEDITION

Caudz segmentum 1 subobtectum, segmentum 2 breve, segmenta 3, 4, 5 majora;

epimera segmenti 3, 4, 5 parva, adpressa, acuta, retroducta.

Telsum breve triangulum, post rotundatum.

Uropodum scapus latere exteriore ad longitudinem canaliculato, processus endopoditi

nonnihil brevior quam scapus.

Color e griseo vel e fusco violaceus, maculis et striis parvis dorsalibus albidis ; anguli

postici trunci segmentorum pellucide albidi; pedes grisei leviter violaceo picti.

Long. 10—12mm. Lat. 4—4°5 mm.

Distribution. Seychelles; the Sealark Expedition collected many specimens, chiefly

in Mahé, at Montagne Alphonse, 1800 ft., the 4 Dec. 1905; Mt. Harrison, 2000 ft.,

Trois fréres, 1500 ft., 17 Nov. 1905; mountain forest, Cascade, 2000 ft., 3 Dec. 1905:

also in Silhouette 1 specimen and in Praslin 2 specimens. In the museum at Hamburg

are many specimens, taken by Dr A. Brauer, 2 to 8 April, 1901.

33. Setaphora suarezi.

Philoscia suarezt Dollfus, Mém. Soc. Zool. Fr. v. 8, p. 185, text-fig. 7, 1895.

Setaphora suarezi Budde-Lund (5), p. 291, Taf. 16, fig. 6—14, (7), p. 15.

Several specimens from Coetivy and Farquhar. This species is common in East

Africa, in the Comoro Islands and in North Madagascar.

34. Setaphora pilosa, n. sp. (Plate 22, figs. 19—23).

Superficies sparse, in segmentis caudie densius, setis minutissimis obtecta.

Oculi magni; ocelli numero circiter 17—18.

Antenne longze, duas partes corporis longitudine superantes; flagellum articulo 5

scapi paululo longius, articulus 1 longissimus, articuli 2 et 3 equilongi, articulus 3 seta

apicali longa.

Frons ante non marginata; lobi laterales parvi, adpressi, rotundate ovales. Epistoma

supra planum, infra linea elevata transversa, subrecta.

Trunci segmentum 1 margine posteriore valde curvato, segmenta 2, 3, 4, margine

posteriore leviter curvato, subrecto, segmenta 5, 6 leviter segmentum 7 fortiter margine

postico medio incurvo; anguli postici segmentorum 1—5 obtusi, rotundati, anguli postici

segmentorum 6—7 subrecti.

Candee segmenta 3, 4, 5, epimeris minimis, adpressis, acutissimis.

Telsum breve triangulum, lateribus leviter incurvis, apice late rotundato.

Color e fusco violaceus, maculis striis parvis punctis albescentibus crebratus, in

epimeris segmentorum 2, 3, 4, 5, trunci macula oblonga albida utrinque posita, in epimeris

ceterorum segmentorum macula evanida; anguli postici trunci segmentorum maxime

posteriorum perlucente albidi; antennze fuscz, flagello flavo.

Long. 5mm. Lat. 2 mm.

Distribution. Chagos Archipelago: many specimens from Salomon; 3 specimens

from Diego Garcia; 6 specimens from Egmont.

——— =e

BUDDE-LUND—TERRESTRIAL ISOPODA 389

Genus Apuitoscra (Budde-Lund (5), p. 291), 1908.

35. Aphiloscia annulicornis.

Philoscia annulicornis Budde-Lund (1), p. 211, 1885.

nd e Dollf., Mém. Soc. Zool. Fr., v. 8, p. 184, text-fig. 6, 1895.

Aphiloscia % Budde-Lund (5), p. 291; Taf. 16, fig. 15—31, 1908.

Seychelles Archipelago: Mahé, mountain forest, Cascade, one large specimen,

9°5 mm. long, 4°5 mm. broad. Farquhar, 30 Sept. 1905, several small specimens.

This species seems to be common in Madagascar and in the Comoro Islands; it is

also found in Mauritius and Réunion.

Subfamilia Olibrininae.

Antenneze longissim, flagello longo, multiarticulato (10—15).

Maxille prioris paris lamina exterior longa, angusta, margine posteriore nudo, apice

dentibus c. duodecim, omnibus integris, simul appendice longa, mobili; lamina interior

apice dense crinito penicillis duobus minus manifesto discretis instructa.

Maxille alterius paris lamina angusta indivisa, apice integro, dense crinito.

Maxillipedum articulus labialis angustus, margine exteriore et interiore ad apicem

pilis longis instructo; palpus magnus, latus, 2-articulatus, articulus 1 brevis spinis solitis

duabus minutis instructus, articulus 2 permagnus, latus, margine interiore ad apicem

undulate producto cum margine exteriore crinibus longis instructo; mala palpo multo

brevior, ad apicem angustata.

Exopoditum pleopodum trachea destitutum.

OLIBRINUS hoy. gen.

Having rather hurriedly to give a report of the collection of terrestrial Isopods from

the Malayan Peninsula gathered by the Skeat Expedition, I had no opportunity to make

a profound examination of the few specimens of the below-mentioned species ; on account

of its habitus and the multi-articulated flagellum of the antennz I placed the species in

the genus Z'richoniscus. I now have had a somewhat larger number of specimens for

examination, and, as it seems, of three different though very nearly allied species.

Olibrinus has to be placed in the family Oniscoide, even though not only by the antennze

but also by the structure of the trophi it makes a transition to the family Ligude. I

have, however, considered it necessary to distinguish it as a subfamily.

36. Olbrinus antennatus (Plate 22, figs. 24—26).

Trichoniscus antennatus Budde-Lund in Proc. Zool. Soc. London, 1902, p. 379.

Superficies levis, nitida.

Oculi minores ; ocelli 8—10.

Antenne perlongz, gracillimz, corpus longitudine paulum superantes ; scapi articulus

1 brevis; articuli 2 et 3 breviores, subsquales; articulus 4 fere duplo longior quam

390 PERCY SLADEN TRUST EXPEDITION

articulus 3; articulus 5 paulo, fere quarta parte longior quam articuli 3 et 4 simul sumpti;

flagellum paulo longius quam scapi articulus 5, 15-articulatum, articulo primo ceteris

longiore.

Trunci segmenta quattuor priora margine posteriore subrecto vel leviter curvato,

angulis posticis rotundate obtusis; segmenta 5 et 6 margine posteriore in medio leviter

incurvo; segmentum 7 margine posteriore in medio fortiter incurvo; anguli postici

segmenti 5 subrecti, segmentorum 6 et 7 acutiores. Segmentum 2 pronoto quarta parte

dorsi vix longiore, utrinque intra angulos laterales desinente.

Caudze segmenta 1—5 post sensim majora, epimeris minimis, adpressis, inflexis.

Telsum breve, medio leviter rotundate triangulo producto.

Uropodes producti, longi, tertiam corporis partem longitudine paulum superantes ;

scapus teres, oblongus, plus duplo longior quam latior ; exopoditum elongate conoidale,

multo, fere duplo, longius quam scapus, apice setis brevibus instructum ; endopoditum

processui brevi scapi insertum, quam scapus paulo brevius, apice tamen scapum superante.

Subunicolor e fusco violaceus.

Long. 5—6mm. Lat. 2—2°3 mm.

Distribution. Malay Peninsula.

37. Olubrinus pigmentatus, n. sp.

Oculi minores, ocelli numero 11.

Antenne perlongee, corpore vix breviores. Flagellum articulo 5 scapi longius,

13-articulatum ; articulus primus ceteris paulo longior.

Frons ante marginata, linea marginalis utrinque decurrens, lobos minores amplectens.

Fosse antennarum permagne, maximam partem inferiorem epistomatis occupantes. An-

tennule sese fere attingentes, spatium inter fossas antennarum occupantes. Clypeus

magnus leviter fornicatus; labrum magnum porrectum. Os porrectum.

Trunci segmenta 1, 2, 3 margine posteriore leviter curvato, utrinque vix incurvo ;

segmentum 4 margine posteriore subrecto; segmenta 5, 6, 7 margine posteriore in medio

post sensim magis incurvo; anguli posteriores segmentorum 1, 2, 3, 4 rotundate obtusi, 5

subrecti, 6, 7 acuti.

Caudze segmenta 5 priora subeeque longa, epimeris omnibus minutis, adpressis.

Segmenta 1, 2 brevia, 3, 4, 5 longiora, epimeris perparvis acutis.

Pleopodes trachea nulla muniti.

Telsum brevissimum, medio anguste rotundate paulum producto.

Uropodes longi, producti, tertiam corporis partem longitudine subzequantes ; scapus

angustus, processu endopoditi brevi; endopoditum gracile scapum paulum superans;

exopoditum longum dimidio longius quam scapus, gracile, teres.

Color albidus, punctis nigris minutissimis pigmentatus.

Long. 6mm. Lat. 2°2 mm.

Distribution. Chagos Archipelago: Salomon, one specimen; Coin, Peros, four

specimens.

ye se

BUDDE-LUND—TERRESTRIAL ISOPODA 391

38. Olbrinus olivaceus, n. sp.

Oculi minores, ocelli majores, c. 10.

Antenne long, gracillime, paulo ($) breviores quam corpus; articulus 1 scapi

brevissimus ; articuli 2 et 3 breves subzequales; articulus 4 plus duplo longior quam

articulus 3; articulus 5 vix longior quam articuli 3 et 4 simul sumpti; flagellum fere

quarta parte longius quam articulus 5 scapi, 10-articulatum, articulo primo longiore

quam ceteris.

Mandibula dextra penicillo altero fixo, altero libero.

Frons ante marginata; linea marginalis medio subrecto, utrinque in lobos laterales

mediocres obtusos, deflexos producta.

Trunci segmenta 1, 2, 3 margine posteriore leviter curvato vel subrecto ; segmentum

4 margine posteriore recto; segmenta 5, 6 margine posteriore in medio incurvo; segmentum

7 margine posteriore in medio fortiter incurvo ; anguli posteriores segmentorum 1, 2, 3, 4,

late rotundate obtusi, segmenti 5 rotundati subrecti, segmentorum 6, 7 acuti. Pronotum

seomenti 2 quart parti dorsi longitudine zequale.

Caudee segmenta 3, 4, 5 post sensim longiora, epimeris parvis, adpressis, acutis,

retroductis.

Telsum breve, medio semicirculatim producto.

Subunicolor e griseo olivaceus.

Long. 8mm. Lat. 2°5 mm.

Distribution. A few specimens were taken at Djibouti by Prof. H. Coutiére in the

year 1897 (Mus. Paris).

Familia Tylide (Tylides, Budde-Lund (1), p. 272), 1885.

39. Tylos minor.

Tylos minor Dollf. (1), p. 189, text-fig. 4a—e, 1893.

Seychelles, sec. Dollf.: ‘‘ Mahé, digue, plage, sous Algues” (Ch. Alluaud).

Familia Ligiide (Zigiw, Budde-Lund (1), p. 242), 1885.

40. Ligia exotica.

Ingia exotica Roux (Crustacés de la Méditerranée et de son littoral...Marseille 1828,

Livr. 3, Tb. 13, fig. 9).

» 5 Budde-Lund (1), p. 266.

Seychelles, sec. Dollf.: ‘“ Plage de l’ile Ronde, rochers prés de la mer” (Ch. Alluaud).

SECOND SERIES—ZOOLOGY, VOL. XV. 50

PERCY SLADEN TRUST EXPEDITION

LITERATURE.

The papers most frequently quoted with abbreviated titles are the following :

BuppE-LUuND.

Do.uirus, AD.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(1)

(2)

Crustacea Isopoda Terrestria, Hauniae, 1885.

A Revision of Crustacea Isopoda Terrestria: I. Eubelum, Kjébenhavn, 1899

(5 Tabb.); IL Spherillonine; III. Armadillo, Kjébenhavn, 1904 (5 Tabb.).

Die Land-Isopoden der Deutschen Siidpolar-Expedition, 1901—1903, rx. Zoologie 1.

Berlin, 1906. (Mit 2 Taf.)

Terrestrial Isopoda from Egypt, in: Results of the Swedish Zoological Expedition

to Egypt and the White Nile, 1901, under the direction of L. A. Jagerskidld.

Nr. 26, A. Upsala, 1908. (With 1 Tab.)

Isopoda von Madagascar und Ostafrika, in: Voeltzkow, Reise in Ostafrika in den

Jahren 1903—1904, ii. Stuttgart, 1908. (Mit 7 Taf.)

Land-Isopoden, in: L. Schultze, Forschungsreise im westlichen und zentralen

Siidafrika, ausgefiihrt im den Jahren 1903—1905 (Denkschr. d. medi.-

naturwiss. Ges. xiv. Jena 1909). (Mit 3 Taf.)

Crustacea. 2 Isopoda, in: Wissenschaftliche Ergebnisse d. Schwedischen

zoologischen Expedition nach dem Kilimandjaro, dem Meru und den

umgebenden Massaisteppen Deutsch-Ostafrikas, 1905—1906. Stockholm,

1910. (With 2 Plates.)

Crustacés Isopodes terrestres, in: Voyage de M. Charles Alluaud aux Iles

Séchelles. (Bull. d. 1. Soc. Zool. de France, t. xvii. p. 186. Paris, 1893.)

(With text figures.)

Isopodes terrestres recueillis & Diégo-Suarez, a Tamatave et a la Réunion, in:

Mission de M. Ch. Alluaud dans le territoire de Diégo-Suarez (Madagascar-

Nord), Avril-Aofit, 1893. (Mém. d. 1. Soc. Zool. de France, t. viii. p. 180.

Paris, 1895.) (With text figures.)

BUDDE-LUND—TERRESTRIAL ISOPODA 393

EXPLANATION OF PLATES 20—22.

PLATE 20.

Fig. 1. Pseudophiloscia lateralis, n. sp. Distal portion of the right mandible, from below. x 135.

Hie 2 = . i Distal portion of the left mandible, from below. x 135.

Hig, 3 ., z% % Distal portion of the exopodite of right 1st maxilla. x 135.

Fig. 4 7 3 Distal portion of the endopodite of the same maxilla. x 135.

Fig. 5. 5, ue 5 Distal portion of the left pes maxillaris. x 75.

Fig. 6 ‘; 5 * Right uropod. x 16,

Bigs 17 - angustissima, n. sp. Distal portion of the right mandible, from below. x 135.

Fig. 8 a ‘5 Distal portion of the left mandible, from above. x 135.

Bio 9 * ie a Distal portion of the exopodite of the left 1st maxilla.

x 250.

Fig. 10. Be - Ms Distal portion of the left pes maxillaris. x 150.

Fig. 11. 3 brevicornis, n. sp. Distal portion of the right mandible, from below. x 150.

Fig. 12. i Rf as Distal portion of the left mandible, from below. x 150.

Fig. 13. 5 - > Distal portion of the exopodite of the left 1st maxilla.

Sle

Fig. 14. x) ai Distal portion of the right pes maxillaris. x 150.

Hig. 15. 5 i 4 Left uropod, from the outer side. x 50.

Fig. 16. a z z Left uropod, from below. x 50.

Fig. 17. Mahehia maculata, n.sp. The head, from above. x 10.

Fig. 18. 5 - Fe Right part of the first segment, from above. x 4

Fig. 19. “ ¥ FA Right part of the second segment, from above. x 4.

Fig. 20. % z, " The right antenna. x 10.

Fig. 21. . 55 5 Distal portion of the right mandible, from below. x 35,

Fig. 22. ¥ ms 7 The apex of the seta of the right mandible. x 135,

Fig. 23. if 5 Fe Distal portion of the exopodite of the left 1st maxilla, x 60.

Fig. 24. m ;. Ee Distal portion of the right pes maxillaris. x 60.

Fig. 25. ¥ . . Right uropod of a female. x 20.

Fig. 26. A laticauda, n. sp. Dorsal aspect. x 4.

PLATE 21.

Fig. 1. Mahehia laticauda, n. sp. Distal portion of the left mandible, from below. x 60.

Fig. 2 Fs s ; Distal portion of the left mandible, from above. x 75,

Fig. 3 P m1 , Ist appendix of the endopodite (lacinia mobilis) of the left

mandible, from above. x 75.

Fig. 4. ‘5 5 i Distal portion of the left pes maxillaris. x 15.

Fig. 5. FA - - 7th leg of the male. x 12.

Fig. 6. is ie - The apex of the same leg. x 135.

Boards - bicornis, n. sp. The head, from above. x 12.

Fig. 8. : é a Distal portion of the right mandible, from below. x 75,

Fig. 9 95 ps , Distal portion of the exopodite of the left Ist maxilla, x 75.

Fig. 10 » % - Posterior part of the cauda. x 4.

Fig. 11. » » : Left uropod of the male. x 20.

50—2

”

PERCY SLADEN TRUST EXPEDITION

. 12. Bethalus simplea Dollfus. Distal portion of the right mandible, from above. x 100.

Distal portion of the left mandible, from below. x 100.

Distal portion of the exopodite of the right Ist maxilla. x 200.

Distal portion of the left pes maxillaris. x 100.

Trichorhina minutissima, nu. sp. The head, from above. x 25.

Trichorhina tomentosa Budde-Lund. Distal portion of the right mandible, from below. x 250.

”

Alloniscus pigmentatus Budde-Lund. Distal portion of the exopodite of right Ist maxilla.

3 Distal portion of the right mandible, from below. x 250.

Distal portion of the left mandible, from below. x 250.

a Distal portion of the exopodite of the left Ist maxilla. x 450.

. The apex of the endopodite of the right 1st maxilla. x 450.

3 Distal portion of the left pes maxillaris, x 135.

3 The apex of right Ist leg. x 500.

a Posterior part of the cauda, from above. x 30.

; Right uropod. x 75.

Distal portion of the exopodite of left Ist maxilla. x 450.

Distal portion of the endopodite of the same maxilla. x 350.

Distal portion of the right pes maxillaris. x 250.

PLATE 22.

Fs Distal portion of the left mandible, from above. x 300.

: Distal portion of the exopodite of the left Ist maxilla. x 350.

% Distal portion of the left pes maxillaris. x 250.

: Posterior part of the tail. x 25.

qusquiliarum Budde-Lund. Posterior part of the tail. x 50.

SSD:

Setaphora ovata, n. sp. Distal portion of the right mandible, from above. x 135.

” ”

Distal portion of the left mandible, from above. x 135.

Distal portion of the exopodite of the left 1st maxilla. x 250.

Distal portion of the endopodite of the same. x 170.

Distal portion of the left pes maxillaris. x 135.

Right uropod. x 25.

pallidemaculata, n. sp. Distal portion of the left mandible, from below. x 75.

m Distal portion of the exopodite of the left 1st maxilla.

Malaos

5 Distal portion of the endopodite of the left 1st maxilla.

1335),

_ Distal portion of the left pes maxillaris. x 135.

Right uropod. x 15.

Distal portion of the exopodite of the right 1st maxilla. x 250.

Distal portion of the endopodite of the same. x 250.

Distal portion of the left pes maxillaris. x 150. ;

Left 1st leg of male. x 70.

Right uropod. x 25.

antennatus Budde-Lund. Antenna. x 15.

» Distal portion of the exopodite of the left 1st maxilla. x 250.

» Left uropod. x 30.

PERCY SLADEN TRUST EXPEDITION. TRANS. LINN. Soc.,SER.2.Z00L.VoL.XV PL. 20

(BuDDE — LUND)

Budde-Lund, del. p E.Wilson, Cambridge

TERRESTRIAL ISOPODA.

PERCY SLADEN TRUST EXPEDITION. TRanS. Linn. Soc., SER. 2.Z00L.VoL.XV PL. 21

(BUDDE —- LUND)

Te eee

Budde-Lund, del. E. Wilson, Cambridge

TERRESTRIAL ISOPODA.

PERCY SLADEN TRUST EXPEDITION. TRANS. LINN. Soc. SER.2.Z00L VoL. XV. PL. 22.

(BUDDE —LUND)

E.Wilson, Cambridge,

No. XXIIIL—PELAGIC ACTINIARIAN LARVA.

By Epira E. Bamrorp, NEWNHAM COLLEGE, CAMBRIDGE.

(Plates 23 and 24.)

(CommuNIcATED BY Pror. J. Stantey Garpiner, M.A., F.R.S., F.L.S.)

Read 2nd November, 1911.

THE collection of Actinian larvee from the Indian Ocean, though small, proves to be

of considerable interest. It consists of thirteen different types ; of these four belong to

the group Zoanthidea, three to the Cerianthidea, and the remaining six probably to the

Actiniaria. The chief interest of the collection lies in the four Zoanthidean larvee ; they

are all new species of the genus Zoanthina (v. Beneden*), and they form a considerable

addition to the few species so far recorded. There are only single specimens of all the

types in the different groups with the exception of one Zoanthina, which has two

representatives.

The larvee were brought home in formalin in seawater. Subsequently they were

put into a saturated solution of corrosive sublimate for one hour and stained with borax

carmine. Serial sections were cut at right angles to the oro-aboral axis and stained with

picronigrosin. The second larva of the Zoanthidean with two representatives was cut

longitudinally.

Zoanthidea.

Four different forms of larve are assigned to this group, but they all belong to the

same type as Semper's first larva, to which v. Beneden gave the generic name, Zoanthina.

Carlgren slightly modified and extended the diagnosis of the genus: “ Pelagische Antho-

zoenlarve von eiformiger Gestalt mit einer ringférmigen, transversal verlaufenden,

geisseltragenden, tiefen Furche, die den Kérper in zwei Partien, einen oralen kleineren,

die die Mundscheibe und das Schlundrohr enthiilt, und einer aboralen grésseren, mehr lang

gestreckten, teilt .”

The four forms belong to undescribed species. Larva IV. is rather discoidal than

egg-shaped. All have twelve mesenteries, of which six are incomplete, among them being

the dorsal directives. Three of the species have the microtype arrangement of mesenteries,

but larva II. has the microtype arrangement on one side and the macrotype on the other.

Of this arrangement Duerdent{ recorded examples as a variation in adults of Palythoa

mamallosa (Ell. & Sol.), Palythoa caribea (Duch. & Mich.) and Gemmaria variabilis

(Duerden), both genera belonging to the Zoanthidea. The endodermal swellings on

* Plankton Expedition, Les Anthozoaires, 1898, p. 196.

+ Nordisches Plankton, Zoantharien Larve, x1. 1906, p. 89.

{ Trans. Roy. Dub. Soc. 2, vi. 1898, Jamaica Actiniw, p. 331.

396 PERCY SLADEN TRUST EXPEDITION

the mesenteries of larva IIL. are of interest, as is also the peculiar development of the

filaments and endodermal outgrowths in larva IV.

1. Larva I. Zoanthina diamanta, n. sp. (Pl. 28, figs. 1, 2.)

The specimen is ovoidal, 3 mm. long by 2°25 mm. in diameter; it is a light brown

colour with darker brown patches. The circular groove is deep and carries long flagelle ;

the oral part is smaller than the aboral, the base of which tapers somewhat. There are no

longitudinal depressions on the surface and no tentacles.

The buccal orifice is circular but the stomodzal cavity is fissure-like. The stomo-

deeum reaches almost to the circular groove, and is conspicuously ridged over the

attachments of the mesenteries. All the mesenteries extend from one pole to the other,

passing through the narrow pedicle between the oral and aboral halves. The endoderm

forms a short central pillar into the aboral end of the ccelenteron, which is also largely

obliterated by thickenings of the parietal endoderm. The mesenterial filaments are direct

continuations of the stomodzal ridges and extend almost to the aboral end.

The ectoderm is a well-marked epithelium containing, (1) numerous, small, radially

directed nematocysts, each with a close spiral filament and, (2) deeply stained, ovoidal,

granular and mucous gland cells, the whole densely packed together on its surface ;

beneath lie numerous spherical nuclei with a few larger, possibly immature nematocysts,

and there is a thin nervous layer over the structureless lamella. The ectoderm both of

the stomodzum and of the mesenterial filaments is ciliated, with numerous granular

gland cells and a few mucous cells; there are no nematocysts.

The structureless lamella is relatively thick and contains a few isolated cells. The

muscles form a single layer over well developed banners in the mesenteries. Parieto-

basilar muscles are also present.

The endoderm is comparatively dense with spherical nuclei near its free edge ; large

patches of a yellow, slightly granular substance and scattered yellow granules are found in

it, particularly over the mesenteries.

Loc. Lagoon, Peros Banhos, Chagos Archipelago, 9 fathoms.

2. Larva II. Zoanthina variabilis, n. sp. (Pl. 23, figs. 3, 4.)

The two specimens are similar in appearance and size to larva I., but there are

indications of ridges on the surface and the aboral end is less tapering.

The stomodzeum extends to the circular groove and is conspicuously ridged, the ridges

continuing on to the mesenterial filaments, which are convoluted towards the aboral end.

The mesenteries extend to the aboral end, and are large and conspicuous in the pedicle.

They are broad and thick, and almost fill up the ccelenteron ; those which are incomplete

are sharply bent backwards, on the sides on which their muscles lie, towards the polyp

wall. At the aboral end is a central column of endoderm, to which radiating endodermal

outgrowths from the base and sides are fused for part of its length.

The histology of the tissues is similar to that of larva I., but the ectoderm and the

endoderm are much thicker ; the deeply situated, possibly immature, nematocysts in the

external ectoderm are very numerous. The endoderm is crowded with small round yellow

BAMFORD—PELAGIC ACTINIARIAN LARV Ai 397

globules, like yolk globules. The muscular fibres form a single layer and parieto-basilar

muscles are present.

Loc. Off Salomon Atoll, Chagos Archipelago, surface ; two specimens.

One specimen has been cut into transverse and the other into longitudinal sections.

The former has the mesenteries in the stomodzeal region arranged on one side in the

microtype manner and on the other in the macrotype.

The arrangement in the other larve of the genus is that the dorsal-directives are

incomplete mesenteries, viz. do not meet the stomodzum and have no filaments, while the

ventral directives, being complete, fuse with the stomodzeum and have filaments; laterally,

complete and incomplete mesenteries alternate from the dorsal to the ventral side, the

whole arrangement being the microtype. In the larva now referred to, on the side with

the macrotype arrangement, the mesentery next but one to the dorsal directive is complete

in that it extends to the stomodzeum throughout its length, but it is not provided with

a filament on its free edge. In the cases referred to as described by Duerden it is the

usually incomplete mesentery of the second pair from the dorsal directives.

3. Larva III. Zoanthina sladeni, n. sp. (Pl. 28, figs. 5, 6.)

The specimen is 1°5 mm. long by 1:125 mm. in diameter ; its colour is white. The

pedicle is comparatively long and the circular groove deep. The oral part is marked by

twelve longitudinal depressions, but the aboral part is not grooved; no tentacles are

present.

The stomodzeum extends to the circular groove and is a fissure-like opening at the

base of a rather ovoidal buccal orifice ; no ridges are present. The mesenteries reach from

the oral to the aboral pole, and towards the latter both extend almost equally into the

coelenteron ; in the pedicle the incomplete mesenteries are minute. There is no aboral

pore, but the centre of the aboral surface is depressed externally and this gives rise

to an upgrowth within the ccelenteron, in some sections simulating the pillar found in larvee

I. and II.

A peculiar feature of the mesenteries is the development of endodermal outgrowths as

in fig. 6. They are circular in section and consist of much vacuolated endoderm with

a central axis formed by the structureless lamella ; neither gland cells nor nematocysts

occur in them. On examining sections from the oral to the aboral end, these outgrowths

are seen near the base of the stomodzeum, and there they are fused together. Near the

base of the circular groove 6 are distinct, 5 in a circle with 1 in the centre. Towards the

aboral end the complete mesenteries are bent sharply back from the centre of the

ccelenteron on the side opposite the muscles. At these bends the structureless lamella

and the endoderm of the outgrowths are fused up with the corresponding structures of

the mesenteries, more aborally appearing to be the direct radial continuations of the

mesenteries on which the filaments look like appendages (fig. 6). Nearer the base the

filaments stop, and the mesenteries left are in half their breadth formed of the above

outgrowths*. Similar endodermal swellings are found on the free edges of the incomplete

mesenteries.

* It is useless to speculate on the function or the homologies of the outgrowths here described, as there is

only one larva and the early stages of its development are quite unknown.

398 PERCY SLADEN TRUST EXPEDITION

The ectoderm is a broad layer with long, granular gland cells passing almost to

the structureless lamella, regular nematocysts with close spiral and also a few, small,

ovoidal nematocysts with loose spiral. The mesenterial filaments are ciliated with granular

gland cells and ovoidal nematocysts ; the stomodzeal ectoderm is similar. The endoderm

of the column, stomodzeum and mesenteries is crowded with zooxanthelle, and contains

a number of ovoidal nematocysts. Throughout the endoderm are patches of a slightly

granular, perhaps yolky substance.

Loc. Off Salomon Atoll, Chagos Archipelago, surface.

4. Larva IV. Zoanthina gardineri, n. sp. (PI. 28, figs. 7—12.)

The specimen is somewhat discoidal, 1-4 mm. long by 2°5 mm. in diameter; the

colour is yellow-brown. The aboral part forms almost a shallow saucer into which the

base of the oral part accurately fits; the circular groove is shallower than in the previous

larvee. Twelve longitudinal depressions on the surface, corresponding to the attachments

of the mesenteries, are found on both parts and to some degree on the oral and aboral

surfaces (fig. 7). There is a still deeper depression on the aboral surface than in larva IIL,

this forming an upgrowth within the ccelenteron.

The stomodzeum nearly reaches the circular groove and is wider than in the previous

larvee, almost quadrilateral; no ridges are present. The mesenteries reach from pole to

pole, but the incomplete ones are very small in the pedicle, where the complete mesenteries

almost fill up the ccelenteron ; aborally they are of nearly the same radial width.

The ventral directive mesenteries show peculiarities which are present to some

degree in the two lateral pairs of complete mesenteries. On examining serial sections the

following structures are found :

(a) Towards the base of the stomodzum, near the stomodzeal wall, a piece of detached

endodermal tissue is seen in each space between the ventral directives and the nearest pair

of lateral complete mesenteries.

(b) These unite with the two complete mesenteries on either side of each space and

also with the endoderm of the stomodeeal wall (fig. 8).

lower is found to be due to the growth upwards and outwards over them of the free lower

edges of the stomodzum ; structureless lamella is next seen below this epithelium.

(d) In each space the web continues for some distance attached to the mesenteries

on either side. Then their attachments to the lateral mesenteries cease and they appear

as outgrowths from the directive mesenteries (figs. 9, 10).

(ec) The stomodzum terminates and the ventral directives are free with the out-

growths, which are now clearly those of the mesenterial filaments, attached to one side of

each.

(f) On the opposite side of each of the directives an enormous thickening of

endoderm appears, leaving fissures below as in fig. 11. These later become filled up, but

the endoderm of these sides of the mesenteries is always very thick.

Similar structures are found also in the other spaces between the complete mesenteries,

BAMFORD—PELAGIC ACTINIARIAN LARVA 399

but their relationship is less clear (figs. 8—11). The whole would appear to be a stage in

the growth downwards of the stomodzeal ectoderm to form the mesenterial filaments. No

trace of such structures are found in connection with the incomplete mesenteries.

The ectoderm resembles that of the last larva (III.) with both types of nematocysts;

mucous cells are conspicuous. The stomodzeal ectoderm and the mesenteries are likewise

similar. The muscle banners are especially conspicuous. The endoderm is also similar,

ovoidal nematocysts being particularly abundant on the mesenteries near the stomodzeum.

It exhibits a quantity of granular, greenish-yellow substance and patches of large bright

yellow granules.

Loc. To the South of Saya de Malha Bank, surface.

Cerianthidea.

Three larvee belong to this division; one is a new species of Dactylactis, v. Beneden*,

and the others approximate most closely to Ovactis, v. Benedent, but are new. All, as is

usual in the division, show the right side preceding the left in development, and larvee II.

and III. are in a stage when there is only present the right mesentery of the couple in

formation. The orientation is the same as that given by v. Beneden ; the terms right (7)

and left (/) are used for the sides to the right and left of the directives when viewed from

the position of the chamber of multiplication.

5. Larva I. Dactylactis cerfensis, n. sp. (Pl. 24, fig. 13.)

The larva is translucent and measures 3 mm. from the aboral end to the end of the

longest tentacle by 2 mm. in greatest diameter. The peristome is introflected and without

lips; no aboral pore is present. Eleven marginal and ten labial tentacles are developed ;

the former approximate to each other at the base and there is no circular groove separating

them from the column. There are 12 mesenteries, 5 on each side of the 2 directives, and

12 chambers, 1 of direction, 1 of multiplication and 5 on each side. A marginal tentacle

is found above each chamber except that of multiplication ; the labial tentacles lie against

the marginals, but there is no tentacle above chamber 5 /.

Towards the oral end mesenteries 57 and 5/ do not reach the stomodzeum, but in

lower sections both reach it, though 5/ only through 2 sections ; both of these mesenteries

stop short considerably above the aboral end; 5/ has no filament, but owing to the loss of

certain sections no statement can be made as to 57. The directives are the shortest of

the remaining mesenteries and have no filaments. The latter are found on all the rest and

are markedly convoluted on 1, 2 and 4. No acontia are present. There is a deep sulcus

with flagellated cells differentiated for a considerable distance, but the presence of a

hyposulcus and hemisulci is doubtful.

The marginal tentacles are quadrilateral in section though slightly flattened. The

ectodermic muscles are most highly developed on their adaxial sides, but near the column

they are well developed on their abaxial sides also. Their nematocysts are long and

narrow with a close spiral filament. There is no glandular zone and the ectoderm of the

column is without glands. The latter has a few tentacular nematocysts with others larger

* Plankton Expedition, Les Anthozoaires, 1898, p. 103. + loc. cit., p. 84.

SECOND SERIES— ZOOLOGY, VOL. XV, 51

400 PERCY SLADEN TRUST EXPEDITION

and obliquely placed. The ectodermic longitudinal muscles are well developed, but there

are no ridges of the structureless lamella for their support.

The mesenterial filaments have numerous granular glands and some large deeply

stained nematocysts with alight central axis. The stomodzeum has well developed ridges,

and its ectoderm has both the tentacular and mesenterial nematocysts as well as granular

gland cells.

The endoderm is much vacuolated. It forms a definite layer on the walls of the

stomodzeum and of the column, but most of this region is filled in with delicate tissue, no

definite boundary limiting the mesenteries. Near the aboral end the mesenteries are well-

defined and leaf-like in section.

Loc. Providence reef, off Cerf Island, surface.

Genus Ovactis, v. Beneden.

V. Beneden defined the genus as follows*: ‘‘ Larves ovoides ou pyriformes, qui l’on

prendrait & premiére vue pour des ceufs. Elles portent a la périphérie du disque buccal un

cercle de mamelons tentaculaires marginaux, si peu saillants, qu’’ peine ils s’apergoivent &

Veil nu, quoique les larves mesurent plusieurs millimetres suivant leur grand axe. L’ap-

parition du tentacule médian est trés-tardive ; elle est toujours postérieure & la formation

des quatre premier couples de tentacules marginaux. II n’en existe encore aucune trace

chez des larves pourvues de douze tentacules chez O. brasiliensis. On peut en dire autant

des tentacules labiaux. Je n’ai trouvé aucune indication de ces organes chez aucune des

especes rapportées & ce genre. Le céne buccal est peu saillant. I] existe des fibrilles

musculaires longitudinales sur les deux faces des sarcoseptes latéraux. Les cloisons iS

seules portent des aconties. Les cloisons directrices atteignent 4 peu prés le pdle aboral.”

The two larvee in the collection are neither egg-shaped nor pyriform, but sub-spherical,

flattened on both their oral and aboral surfaces. No longitudinal muscular fibres are found

on the lateral mesenteries and there are no acontia. The time of the development of the

median tentacle is not known, but in the second larva (larva III.), where there are tenta-

cular processes, the median process is the smallest so that it is evidently late in developing.

6. Larva II. Ovactis superficialis, n. sp. (Pl. 24, fig. 14.)

The larva is colourless, translucent and almost spherical, flattened orally and con-

siderably depressed aborally ; its length is 2 mm. and its maximum diameter 2°8 mm. On

each side of the median plane the oral surface is raised forming the lips of the buccal cone.

There are no tentacles nor rudiments of tentacles.

In transverse section the stomodzeum is small, quadrilateral above, but nearer the

enterostome broadly elliptical. A sulcar groove is differentiated, there are stomodzal

ridges near the enterostome, and both hyposulcus and hemisulci are present but short.

There are 17 mesenteries which are all complete, 8 on the right and 7 on the left of the

2 directives. Mesentery 8 is the shortest, then mesentery 7/ and next mesentery 7 7.

With the exception of mesentery 6/, which nearly reaches the base, all the mesenteries

extend to the aboral end. The mesenteries in transverse section are somewhat leaf-like in

* loc. cit. p. 84.

i ae

BAMFORD—PELAGIC ACTINIARIAN LARV Zi 401

form ; no muscles can be distinguished. There are mesenterial filaments on all except

8 and 7/. Convolutions are found on mesenteries 1, 2, 4, and 6, and also mesenterelles ;

on mesenteries 4 7 and 6 / they are slight. There are no acontia.

The ectoderm of the column has granular glands and a few spiral nematocysts ; that

of the stomodzum is similar. The tissue of the mesenterial filaments has numerous

granular glands and a few spiral nematocysts occur in the filaments. The structureless

lamella is produced into long narrow processes simple or branched which bear the longi-

tudinal ectodermal muscles. The endoderm is a thin but compact layer on the column and

stomodzeum ; on the mesenteries it is much vacuolated.

Loc. Off Salomon Atoll, Chagos Archipelago, surface.

7. Larva II. Ovactis indiana, n. sp. (Pl. 24, fig. 15.)

The larva is like the last, but it is shrunken in places; its length is 2°5 mm. and its

maximum diameter 2°75 mm. The peristome is introflected and there is no buccal cone ;

the edge of the peristome is seen in the sections to be produced into protuberances, the

beginnings of tentacles, above some of the mesenterial chambers.

The stomodzeum has a broadly elliptical cavity; it possesses no ridges and the

epithelium of the sulear groove is not differentiated; a hyposuleus and hemisulci

are present.

The ectoderm of the stomodeum is in direct continuity with the mesenterial

filaments. There are 17 mesenteries near the oral end, 8 on one side and 7 on the

other side of the two directives. Mesentery 8 is the shortest, then mesentery 7 /, and

these do not extend below the stomodzeum; the next shortest is mesentery 77. Near

the oral end there are 17 inter-mesenterial chambers, but below the stomodzeum only

14. Mesentery 8 and mesentery 7/ have no mesenterial filaments; the rest have

filaments, except mesentery 7 7, which has a terminal swelling not continuous with the

ectoderm of the stomodeum but provided with spiral nematocysts. The filaments of the

even numbered mesenteries and also 17 and / are convoluted. In section the mesenteries

are leaf-like and those which have convolutions have also mesenterelles. Acontia are

absent.

In the ectoderm of the column are numerous glands, some large, stained blue, con-

taining large granules, others small, stained red, containing small granules. Nematocysts

of the common form, long and narrow with a close spiral, are numerous, and at the oral

end and on the peristome are a few exceptionally large nematocysts, deeply stained, with

straight axes. On each of the tentacular prominences, or on the column just below each,

is a group of mucous gland cells. Greenish spherical bodies, which in some cases have

a rough external surface, are fairly numerous near the base of the ectoderm ; in transverse

section they show two or three lightly coloured spots. The mesenterial filaments have

closely packed granular glands and a few spiral nematocysts; the stomodzeal ectoderm

is similar, with additional long, narrow and deeply stained nematocysts. The ectodermal

muscles are carried on rounded projections of the structureless lamella. There is as yet no

trace of muscles, but banners have commenced to form.

Loc. Lat. 4° 16’S., long. 71° 53’ E., North of Chagos Archipelago, 25 fathoms.

51—2

402 PERCY SLADEN TRUST EXPEDITION

HEXACTINIAN LARVA.

The Hexactinian™ larvae described by vy. Beneden formed two groups: (1) larvee

with 8 mesenteries; (2) larvee with 24 mesenteries; these larve he did not name.

In 1906 Carlgrent divided his larvee into four groups according to their mode of life,

the arrangement of the tentacles, and the time when the latter begin to develop.

“A. Larven mit einem pneumatischen Apparat, mit vielen Tentakeln und vielen

Mesenterienpaaren: die Minyaden. (Nicht in nordischen Meeren angetroffen.)

B. Larven, die parasitisch an Medusen leben, und also nur in zweiter Linie ein

pelagisches Leben fiihren. Die Tentakeln werden in dem Achtmesenterien-stadium

angelegt. Alle sechs Exocoeltentakeln des Halcampulastadiums sind in dem Stadium

mit acht Tentakeln vorhanden.

C. Larven, die wiihrend liingerer Zeit pelagisch leben und die bis zu einem Stadium

mit zwei Mesenteriencyklen keine Tentakeln entwickeln.

D. Larven, die als solche ein kiirzeres Leben haben und die in dem Achtmesenterien-

stadium Tentakeln ausstiilpen. Nur zwei Exocoeltentakeln des Halcampulastadiums sind

in dem Stadium mit acht Tentakeln vorhanden.”

In the collection there are six different types of larvee which probably belong to the

Hexactiniae, and if so, according to Carlgren’s divisions, they should all be placed in

group C. Of these six larvae, two have 8 mesenteries, three have 12, and one has 20, and

all are without tentacles.

It is impossible to classify them generically and specifically. All that can be said

is that they are probably all different species and that the larvee with more mesenteries

do not represent older stages of the larvee with fewer mesenteries : apparently they are

not the same species as any that have been so far described.

The chief points of interest are the presence of embryos in one of the specimens

with only 8 mesenteries and the peculiar relation of the mesenterial filaments.

Larva wits Eiaut MESsENTERIES.

8. Larva I. (Pl. 24, fig. 16.)

The larva is white and subspherical, its aboral end produced into a hollow pro-

tuberance ; its length is ‘5 mm. and diameter ‘75 mm. There are eight radiating grooves

on the peristome.

Eight complete mesenteries are present, continued to the base but little projecting in

that part; with their well-developed muscles they have the Edwardsian arrangement.

Filaments are present on all, but on the directives they only extend through a few

sections; they are much convoluted on the ventro-lateral mesenteries. Epithelial cells

are found on the enterostomal wall within the mesenterial chambers, due to the edge of

the enterostome either being slightly turned up or having slightly grown up. The

filaments are connected with this epithelium, which also grows up orally on the dorsal

* Plankton Expedition, Les Anthozoaires, 1898, pp. 150 and 183.

7 Nordisches Plankton, Zoantharien Larve, x1. 1906, p. 80.

BAMFORD—PELAGIC ACTINIARIAN LARV Ai 403

sides of the lateral mesenteries, becoming detached at its ends so as to form free filaments

within the chambers. Such a free filament has passed through the left dorso-lateral

mesentery. Parieto-basilar muscles are developed.

The ectoderm of the column contains granular glands and nematocysts with close

spiral threads. That of the aboral part is very thick and has numerous nematocysts with

loose irregularly coiled threads, the close spiral kind being absent. The ectoderm of the

stomodzeum is ciliated with numerous granular glands, the filaments are similar with large

and long nematocysts with close spiral threads, and others which stain deeply but not

clearly; there are thus three (or four) kinds of nematocysts. The endoderm has no

nematocysts ; zooxanthellz are present in its cells and there are numerous vacuoles which

appear to have been occupied by them. Between the mesenteries parietal endodermal

outgrowths, which are large aborally, project into the ccelenteron.

Loc. South of Saya de Malha Bank, surface.

9. Larva IJ. (Pl. 24, figs. 17—19.)

The larva is white, cylindrical, tapering slightly aborally with a depression but

no pore; it is 1°5 mm. long and 1mm. broad. The peristome shows eight grooves,

which continue down the side of the column. The stomodeeum is rather more than

a third the length of the column and has a circular lip about its middle projecting into

its cavity.

The eight mesenteries are complete with filaments on all and reach to the aboral end,

but their muscles are too little developed for their arrangement to be ascertained. The

filaments on the pairs of directives though of considerable length are shorter than those on

the lateral mesenteries which almost reach the aboral end; on the lateral mesenteries they

are much convoluted. There is a distinct upturned fold of the enterostomal wall and the

connection of the filaments of the lateral mesenteries with this epithelium falls within the

mesenterial chambers.

The ectoderm is only preserved in a few places and its detailed structure is

uncertain. That of the stomodzeum has granular and mucous gland cells and long

narrow nematocysts with a close spiral thread, as well as other deeply stained

nematocysts. The endoderm is much vacuolated and the ccelenteron is almost filled

with loose endodermal tissue.

Loc. Mauritius, 5 miles west of Black River, 300 fathoms.

Within the endoderm are three embryos (fig. 20) in different stages of development.

Four embryos were described by v. Beneden in the larva of Zoanthina nationalis

(v. Beneden). He suggested that the larva and its embryos were offspring of a viviparous

parent, and that the embryos found their way into the larva within the parent and

subsequently continued their development. In all parts of the endoderm of the present

larva, particularly in that of the mesenteries, unicellular cells are found with large

nuclei; these look like reproductive cells. It may also be remarked that with the

ccelenteron almost filled with endodermal tissue the entrance of young embryos is

unlikely.

404 PERCY SLADEN TRUST EXPEDITION

LARVA witH TWELVE MESENTERIES.

10. Larva I. (Pl. 24, fig. 20.)

The larva is opaque-white, much flattened orally and aborally ; its length is “5 mm.

and diameter ‘75mm. There are 12 radiating grooves on the peristome. The stomodeeum

is short and without ridges.

Of the mesenteries 8 are complete and 4 incomplete but their muscles are so

little developed that their arrangement is uncertain. Filaments are only produced for

any distance on one lateral and one directive mesentery, and on these they have very

large nematocysts.

The ectoderm of the column and stomodzeum is thick and vacuolated; nematocysts

are comparatively few but of two kinds, small with a close spiral thread and large with

a loose spiral thread; granular and mucous gland cells occur. The endoderm is compact,

with numerous zooxanthellz; between the mesenteries it is produced into the ccelenteron

and more vacuolated.

Loc. South of Saya de Malha Bank, surface.

11. Larva I. (Pl. 24, fig. 21.)

The larva is opaque-white, irregularly cylindrical, narrowing aborally; its length is

‘66 mm. and diameter °5 mm. There are no grooves on the peristome. The stomodzum

is very short.

All the mesenteries reach the aboral end, but, as the stomodzeum is excentric and as

the parts are not clearly defined on the side where the mesenterial chambers are small, it

is impossible to see their arrangement. One mesentery has a much greater radial extent

than the others and is the only one with a filament. The latter has large spiral

nematocysts, and on the free edges of two other mesenteries similar nematocysts are

found near their aboral ends.

The ectoderm of the column and stomodzeum is similar to that of the last larva,

but it is more compact and only the smaller nematocysts are found. The endoderm is

likewise similar; zooxanthellae are numerous and smaller, elongated, homogeneously

staining bodies, pointed at each end and quadrilateral in section.

Loc. South of Saya de Malha Bank, surface.

12. Larva I7f. (Pl. 24, fig. 22.)

The larva is translucent, flattened orally and aborally and shrunken; its length

is 1 mm. and diameter 1°66 mm. The stomodzum is long but of small diameter.

Of the mesenteries 8 are complete and 4 incomplete, but filaments are only found

on the 4 complete laterals; the epithelium of the enterostome is continued on to the

sides of these and then passes to form their filaments, spreading out over their greatly

expanded edges (fig. 23). Beneath the latter occur spherical bodies, homogeneous

parietally and vacuolated within, and some large nuclei are found near. What these

bodies are is uncertain, but they occupy to some degree the position of reproductive

cells. Muscles are not distinguishable.

——

BAMFORD—PELAGIC ACTINIARIAN LARVA 405

The ectoderm is thin and compact, so thin indeed that the nematocysts with close

spiral threads, which alone are present, are placed obliquely; mucous gland cells are

abundant. The stomodzal ectoderm is thick with numerous granular glands but no

nematocysts, and the filaments are similar but with long narrow nematocysts. The

structureless lamella is thicker than the ectoderm and also than the endoderm, which

is peculiarly thin.

Loc. Three miles N.W. of Desroches Atoll, 100 fathoms.

Larva witH Twenty MEsENTERIES. (PI. 24, fig. 23.)

13. A single translucent, almost spherical larva, 1°5 mm. long by 1:2 mm. in

diameter, with a deep depression on one side to which sponge spicules adhere, has

12 complete and 8 rudimentary mesenteries. The stomodzeum is very short. Longi-

tudinal muscles are present on some of the complete mesenteries. Filaments occur on all

except the couple next to one of the directive pairs; they are shortest on the directives

opposite to the pair mentioned above, but all stop some distance above the

aboral end.

The ectoderm is a comparatively thick layer of vacuolated tissue with scattered

nematocysts of a long and narrow form with somewhat irregularly and loosely coiled

threads; a second large kind of nematocyst is found and granular glands are present.

The ectoderm of the stomodzum is dense with the first kind of nematocysts and granular

glands; it is continuous on the sides of the mesenteries and forms the filaments which

have spirally-threaded nematocysts.

Toc. Lat. 3° 31'S., long. 72° 27’ E., north of the Chagos Archipelago, 100 fathoms.

406 PERCY SLADEN TRUST EXPEDITION

EXPLANATION OF PLATES.

PLATE 28.

Zoanthidea.

Fig. 1. Larva I, Zoanthina diamanta, n.sp.: (a) side view; (b) oral surface.

Fig. 2. Transverse section of larva I, across aboral part.

Fig. 3. Larva II, Zoanthina variabilis, nsp.: (a) side view; (b) oral surface.

Fig. 4. Transverse section of larva II, across aboral part.

Fig. 5. Larva III, Zoanthina sladeni, n.sp.: (a) side view; (b) oral surface.

Fig. 6. Transverse section of larva III showing the endodermal swellings and their attachment

to the mesenteries.

Fig. 7. Larva IV, Zoanthina gardineri, n.sp.: (a) side view; (6) oral surface; (c) aboral surface.

Figs. 8—12. Transverse sections of larva IV, showing the mesenteries and mesenterial filaments,

series drawn near the enterostome.

PLATE 24.

Cerianthidea.

Fig. 13. Larva I, Dactylactis cerfensis, n.sp.: (a@) side view; (b) oral surface.

Fig. 14. Larva II, Ovactis superficialis, n.sp.: (a) side view; (6) oral surface.

Fig. 15. Larva III, Ovactis indiana, u.sp.: (a) side view; (b) oral surface.

Hexactiniaria.

(1) Larve with 8 mesenteries.

Fig. 16. Larva I: (a) side view; (b) oral surface.

Fig. 17. Larva II: (a) side view; (b) oral surface.

Fig. 18. Transverse section of larva II showing reflexed free edge of stomodeum within

mesenterial chambers.

Fig. 19. Transverse section of larva II showing the convoluted mesenterial filaments, the loose

endodermal tissue within the ccelenteron, the largest embryo cut longitudinally and

a second embryo.

(2) Larve with 12 mesenteries.

Fig. 20. Larva I: (a) side view; (0) oral surface.

Fig. 21. Larva II: (a) side view; (0) oral surface.

Fig. 22. Transverse section of part of the wall of the column of larva III and a mesentery

expanded at its free edge in which are spherical bodies.

(3) Larva with 20 mesenteries.

Fig. 23. Larva: (a) side view; (0) oral surface.

PERcY SLADEN TRUST EXPEDITION. TRANS. LINN. Soc. SER. 2.Z00L.VoL. XV PL. 23

E Wilson, Cambridge

PELAGIC , ACTINIARIA

PERCY SLADEN TRUST EXPEDITION. TRANS. LINN. Soc. SER.2.Z00L.VOL.XV. PL. 24.

E Wilson, Cambridge

20 b a 21 b

PELAGIC ACTINIARIA.

No. XXIV.—ON THE FERNS OF THE SEYCHELLES AND THE

ALDABRA GROUP*.

By Cart CHRISTENSEN, M.Sc. (Copenhagen).

(ComMUNICATED BY PRoFEssor J. Srantey Garpiner, M.A., F.R.S., F.L.S.)

(Plate 25.)

Read 6th June, 1912.

On the suggestion of Dr O. Stapf, Keeper of the Herbarium and Library, Royal

Botanic Gardens, Kew, I undertook the determination of a collection of ferns made in

the Seychelles by Professor J. Stanley Gardiner during the ‘ Sealark’ Expedition in 1908,

and the preparation of a complete list of the ferns of the Seychelles. It is true, the

islands are not a terra nova for pteridography ; nevertheless a revision of the fern-flora

of the islands was thought desirable so as to bring it into line with modern ideas of

pteridography.

The ferns of the Seychelles have been dealt with twice by J. G. Baker}, and later on

by M. Kuhn {, who published a list of the ferns occurring in theislands. Whilst Baker

knew 74 species of true ferns indigenous in the island, Kuhn enumerated 76 species, and

my list includes 78 species.

It was an easy task to name the specimens in accordance with Baker’s treatment, but

as my ideas of the delimitation of nota few species differ essentially from those of Baker,

who takes the species in a much broader sense, I examined the material critically and

compared it with specimens which the authorities of Kew kindly forwarded to me for

that purpose. For this my best thanks are due to Sir David Prain and Dr Stapf. As

will be seen, I do not agree with all of Baker’s determinations, and therefore my list differs

in certain points from his. My nomenclature too is, of course, very different from his.

With few exceptions, I follow the nomenclature of my ‘ Index Filicum,’ which is quoted

under each species. In that work the essential synonyms and references will also be

found, wherefore it is unnecessary to repeat them here.

So far as is known, the Seychelles are inhabited by 78 species of ferns, all but one

(Ceropteris calomelanos, which probably is introduced) indigenous in the islands. All

these species were collected in the higher islands, Mahé and Silhouette; three or four

were also found in Bird Island and Long Island. No fern is known from the other

islands (Praslin, La Digue, and Curieuse). Prof. Gardiner has added four species to

the fern-flora of the islands.

* Reprinted from Trans. Linn. Soc., ser. 2, Bot., vol. vii. pp. 409-25, pl. 45, 1912.

+ J. G. Baker: “On the Seychelles Fern-Flora,” in Trans. R. Irish Acad. vol. xxv. (1875), pp. 509-518,

tabb. 28-31; ‘ Flora of Mauritius and the Seychelles ’ (1877).

+ M. Kuhn: Cryptogame vasculares, in ‘ Botanik von Ost-Afrika’ in Von der Decken’s Reisen, vol. iii. part 1

(1879), pp. 68-69.

SECOND SERIES—ZOOLOGY, VOL. XV. 52

405 PERCY SLADEN TRUST EXPEDITION

The composition of the fern-flora of the Seychelles is of some interest, because the

group is situated so far east from the African continent. ‘The following table shows the

Specres oF Western DistRiBurion.

American species extending

eastwards to tropical

Asia: 4.

American species extending

eastwards to the

Seychelles: 5.

Species confined to Africa

and the South-eastern

Africau islands: 10.

Species confined to the

South-eastern African’

islands: 6.

Hymenophyllum polyanthos., Polypodium serrulatum.

H, ciliatum.

Elaphoglossum petiolatum.

E. spathulatum.

|P. cultratum.

Elaphoglossum martinicense,

E. latifolium.

Ophioglossum palmatum.

Trichomanes erosum.

Oleandra articulata.

Davallia cherophylloides.

Stenochlena tenuifolia.

Pellea Doniana.

P. viridis.

Pteris atrovirens.

Adiantum rhizophorum.

Lonchitis pubescens.

Vittaria isoetifolia.

| Hymenophyllum hygrometricum.

| Dryopteris strigosa.

D. mauritiana.

Aspidium pleiotomum.

Diplazium sechellarum.

Monogramma graminea.

SPECIES ENDEMIC IN THE

SEYCHELLES: 12.

Cyathea sechellarum.

Dryopteris Hornet.

D. Wardii.

Leptochilus bipinnatifidus.

Lindsaya Kirkii.

L. Hornet.

Asplenium complanatun.

Stenochlena Pervillei.

Pteris Barklye.

Polypodium Pervillet.

P. albobrunnewn.

Elaphoglossum Hornet.

Sprcres oF Eastern Disrrrsurion.

CosmoromiraNn SPECIES: 1],

Species extending from

tropical Africa to

Polynesia: 18.

Microlepia spelunce.

Schizoloma ensifolium.

Asplenium nidus.

A, unilaterale.

Adiantum caudatun.

Actiniopteris australis.

Pteris tripartita.

Vittaria elongata.

V. scolopendrina.

Hymenolepis spicata.

Polypodium punctatum.

P. phymatodes.

Cyclophorus spissus.

Platycerium bifurcatum.

Ceratopteris thalictroides.

Gleichenia linearis.

Marattia fraxinea.

Angiopteris evecta.

distribution of the different species.

Polynesian-Asiatie species

reaching westwards to the

South-eastern African

islands, not in continental

Africa: 10.

_| A. caudatum.

Trichomanes cupressoides.

Dryopteris cucullata.

Odontosoria chinensis.

Asplenium tenerum.

A. affine.

A. bulbiferum.

Antrophywm immersum.

A. callifolium.

Schizea digitata.

Ophioglossum pendulum.

Dr yopteris parasitica.

Polystichum adiantiforme.

Nephrolepis cordifolia.

NV. hiserrata.

Asplenium lunulatum.

Pteris biaurita.

P. quadriaurita.

HMistiopteris incisa.

Elaphoglossum conforme.

Acrostichum aureum.

remaining 65 species can be sorted into three groups :—

Not considering the 11 cosmopolitan species, the

I. 9 (4-45) species have their centre in tropical America, 5 of these reaching their

eastern limit in the Seychelles.

CHRISTENSEN—FERNS OF SEYCHELLES AND ALDABRA 409

II. 28 (10+6+12) are confined to Africa, including the islands; 18 of these are

not found in tropical Africa, but are endemic in the South-eastern islands, and 12

species are endemic in the Seychelles. Nearly all these endemic species may

be regarded as specialized forms of groups which are richly developed in other

regions, perhaps with the exception of Pteris Barklye, a peculiar species, which is

probably most closely related to the Mascarene Ochropteris. If we take the

relationship of the endemic species into consideration, we find that some of them

point westwards (Dryopteris Wardii, Polypodium Pervillei, Elaphoglossum

Hornet), others eastwards (Leptochilus bipinnatifidus, Lindsaya Kirkii, L. Hornet),

while Asplenium complanatum, Stenochlena Pervillei, and perhaps Polypodium

albobrunneum are members of groups specially developed in the Mascarene and

other South-eastern African islands.

III. 28 (18+10) species have their maximum in tropical Asia and Polynesia; 10

of these reach their western limit in the South-eastern African islands, and among

these there are 4 species (Asplenium tenerum, A. bulbiferum, Antrophyum callifolium,

and Schizea digitata) which have their western boundary in the Seychelles.

The above may be summarized thus: the fern-flora of the Seychelles is a mixture of

western and eastern species, the latter being in majority. Five species here reach their

eastern limit, four their western. The fern-flora as a whole shows no peculiar character ;

16 per cent. of the species are endemic.

From the Aldabra group only one species is known, the common mangrove fern,

Acrostichum aureum.

HYMENOPHYLLACE.

1. TRICHOMANES EROSUM, Willd.(?); Baker, Fl. Maur. 464; C. Chr. Ind. 639.—

? 7. cuspidatum, Kuhn, Bot. v. Ost-Afr. 68.

Common in the mountain forests, Horne. Silhouette, 2000 feet on trees, Gardiner !

It is with the greatest doubt that I refer the specimens from the Seychelles to 7. erosum,

Willd., which is a West-African species. In general habit the small leaves agree much

more with 7’. cuspidatum, Willd., but they differ in the lack of an intramarginal, spurious

vein and in the more distinct midrib and lateral veins. The fronds vary in shape,

from circular and entire to triangular-oblong, 3 em. long by 1-1} em. broad, and

irregularly repand or serrate, not regularly pinnatifid as in the true Z. eroswm. The

form may be specifically distinct from 7. evoswm as well as from T, cuspidatum.

2. TRICHOMANES CUPRESSOIDES, Desy. Prodr. 330, 1827; C. Chr. Ind. 638.— 7. obscurum,

var. pectinata, Mett.; Kuhn, Fil. Afr. 35. 7. rigidum, Baker, Fl. Maur. 465.

Mahé, Silhouette, and Long Island, Gardiner! A typical fern on rocks on mountains,

2000-2500 feet.

52—2

410 PERCY SLADEN TRUST EXPEDITION

This species, which was originally described from plants from the Seychelles, is

common in all the South-east African islands. The Malayan 7. obscurwn, Blame,

is very similar and very likely not specifically different.

3. HYMENOPHYLLUM POLYANTHOs, Sw.; Baker, Fl. Maur. 462; C. Chr. Ind. 366.

Mahé, Horne, 146! Gardiner! Silhouette, on trees, 2000 feet, Gardiner!

Also found in Madagascar and tropical West Africa and widely spread in tropical

America. A closely allied species, H. Blumeanum, Spr., occurs in tropical Asia.

4, HYMENOPHYLLUM CILIATUM, Sw.; Baker, Fl. Maur. 462; C. Chr. Ind. 358.

Mahé, Gardiner! Widely spread in the tropics.

5. HYMENOPHYLLUM HYGROMETRICUM (Poir.), Desv.; Baker, Fl. Maur. 463; C. Chr. Ind.

362.

Mahé, Pervillé, Horne, Gardiner! in jungle anywhere and at any altitude, on trees

or rocks. Silhouette, Gardiner! i

The species is confined to the South-east African islands.

CYATHEACE.

6. CYATHEA SECHELLARUM, Mett.; Baker, Fl. Maur. 467.

Mahé, Horne, 208! Silhouette, Gardiner !

Endemic.—I quote from the labels. Horne says: ‘Common at and above 1000 ft.

in Mahé. Trunk in ravines 40-50 ft. Stipe 1-2 ft. Frond 4-9 ft. long, 2-4 ft.

broad.” Gardiner: “ Part of a tree-fern [from the summit of the island of Silhouette,

above 2120 ft.]. There are no trunks; the base rising only about 6 in. above ground.”

Gardiner’s specimen is sterile and may, of course, have been taken from a young

plant without a developed caudex. It is surprising that Gardiner did not collect the

species in Mahé, where in 1871 it was common, according to Horne, which suggests

that it is nearly or quite extinct. [It is still found in the indigenous jungles of the hill-

tops of Central Mahé, but is disappearing. It was ina press from Mount Harrison

which went astray.—J. 8. G.]

POLY PODIACEA.

7. DRYOPTERIS sTRIGOSA (Willd.), C. Chr. Ind. 295.—Aspidium strigosum, Willd.; Kuhn,

Bot. v. Ost-Afrika, 37. Nephrodiwm tomentosum, Baker, Fl. Maur. 496, pro parte.

I list this species with some doubt among the ferns of the Seychelles, as I have seen

only a single, rather scanty specimen from the islands (Horne, 678), determined by

Baker as Nephrodium tomentosum. It does not belong to the true Dryopteris tomentosa

(Thouars), but rather to D. strigosa (Willd.), according to Kuhn’s delimitation of that

species. Still the determination is rather doubtful, the basal pair of veins is truly united.

The species is known from the Mascarenes and Madagascar.

CHRISTENSEN—FERNS OF SEYCHELLES AND ALDABRA 411

8. DRryYoPTERIS PARASITICA (Linn.), O. Kuntze; C. Chr. Ind. 282.—Nephrodium molle,

Baker, Fl. Maur. 4.99.

Mahé, Horne, 202!

The species taken in a broad sense is common in all tropical and subtropical regions.

The form growing in the Seychelles is scarcely conspecific with the common American

D. mollis (Jacq.), Hieron.

9. DRYOPTERIS CUCULLATA (Blume), Christ, Philippine Journ. Sci. Bot. ii. 194, 1907.—

Nephrodium cucullatum, Baker, Fl. Maur. 498. Dryopteris unita (Linn.), O. Kuntze ;

C. Chr. Ind. 299.

Mahé, Silhouette, and Long Island, Gardiner! Typical fern of open spaces,

1000-2000 feet.

Distribution. Through tropical Asia and Polynesia, and common in the South-east

African islands.

10. DRYOPTERIS MAURITIANA (Fée), C. Chr.—Nephrodium elatum, var. mauritianum,

Baker, Fl. Maur. 499.—Aspidiwm procerum, Bojer; Kuhn, Bot. v. Ost-Afrika, 41

(with description).

Var. GARDINERI, C. Chr. (var. nov.).

A forma typica differt: pznnis brevioribus, ad 12 cm. longis 2 em. basi latis, atro-

viridibus, tenuiter membranaceis, ad costas costulasque supra albido-setosis, infra

breviter et sparse hirtis, inter venas utrinque glabris, infra glandulis sessilibus

subdense glandulosis; laciniis vix obliquis, obtusis; vents 8-10-jugis, pellucidis,

basalibus 2-4 alternatim unitis ; ¢adusiis magnis, glabris.

Silhouette, Gardiner, Aug. 2,1908. Mahé, H. P. Thomasset (this is more like the

type). .

The typical form of D. mauritiana was found previously in the Mascarenes and

Comoros. The species is new to the Seychelles. The single leaf collected measures

14 m. in length ona stipe scarcely 10 cm. long ; it narrows downwards rather gradually

through about 15 pairs of auriculiform pinnz, 3-2 cm. long and broad, and hastate. It

differs from the type mainly in the glandular underside and its patent, obtuse segments.

The pinne taper from a broad base towards the acuminate apex.—I am inclined to

believe that Aspidiwm elatum, Bojer, from Mauritius is specifically distinct.

11. Dryopreris Warpir (Baker), O. Kuntze; C. Chr. Ind. 301.—Nephrodium Wardii,

Baker, Trans. R. Irish Acad. xxv. (1875), tab. 30; Fl. Maur. 496.

Mahé, Ward! Horne, 177! Gardiner! Silhouette, Gardiner !

Endemic. Rhizome horizontal, about 2 cm. thick, densely covered with glossy, brown,

narrow acuminate scales, 1-2 cm. long. Stipe about 25 cm, long, slightly scaly at the

base. Lamina about 50 em. long, 40 em. broad at the base, entirely glabrous. In habit

not unlike D. effusa (Sw.), Urban, of tropical America.

412 PERCY SLADEN TRUST EXPEDITION

12. Dryopreris Hornet (Baker), O. Kuntze; C. Chr. Ind. 271.—Nephrodium Hornei,

Baker, F]. Maur. 497.

Mahé, Horne, 182! Silhouette, Horne, 685 !

Endemic. The pubescence is peculiar, the coste and costule above are rufous-tomen-

tose from short, articulated hairs (the typical pubescence of my subgenus Ctenitis) ; the

veins beneath are densely covered with very short and thick, appressed glandular hairs,

which in well-preserved specimens are glossy, golden yellow, in old specimens whitish,

meal-like. I remember only one species which shows a similar pubescence, viz.

D. chrysotricha (Baker), C. Chr., from Samoa, but in that the hairs are bright yellow.

13. ASPIDIUM PLEIOTOMUM (Baker), Kuhn; C. Chr. Ind. 88.—Nephrodium pletotomum,

Baker, Tr. Roy. Irish Acad. xxv. (1875), tab. 313; Fl. Maur. 500.

Mahé, Horne. Silhouette, Gardiner !

Also Madagascar, fide Baker.

14, PoLYsTICHUM ADIANTIFORME (Forst.), J. Sm.; C. Chr. Ind. 578.—Aspidiwm capense,

Willd.; Baker, Fl. Maur. 492. <Aspidiwm coriaceum, Sw.; Kuhn, Bot. v. Ost-

Afrika, 69.

Mahé and Silhouette, Gardiner! Sometimes partially epiphytic.

Distribution. Australia and Southern Polynesia. South Africa and adjacent islands.

America from Cuba and Jamaica to Fuegia. A common species in most oceanic islands

of the southern hemisphere. The numerous specimens collected by Gardiner are rather

different, especially in size; some of them are scarcely more than bipinnatifid with a

lamina not more than 10 em. long, but fully fertile.

15. LeprocHILus BIPINNATIFIDUS (Mett.), C. Chr. comb. nov.—Chrysodium bipimna-

tifidum, Mett.; Kuhn, Fil. Afr. 50. Acrostichwm repandum, Baker, Fl. Maur. 514

(non Blume).

Mahé, Boivin! Gardiner! Silhouette, near the summit, Gardiner!

Perhaps endemic. It is also recorded from Réunion (coll. Boivin); but Jac. de

Cordemoy has not seen it. All Boivin’s specimens in the Museum of Paris seen by me

are from the Seychelles.

T now think that this can safely be regarded as a species distinct from the Asiatic and

Polynesian L. cuspidatus, C. Chr. (Acrostichum repandum, Blume). It differs in the more

deeply cut pinnee, which are truncate at the base, not cuneate, and in the more decidedly

scaly coste. The lowermost pinne are rather unequal-sided, the upper ones decurrent

at the lower base, and the fertile pinnee deeply cut into bluntly rounded lobes. ‘The

sterile fronds often have rooting tips.

16. OLEANDRA ARTICULATA (Sw.), Pres] ; Baker, Fl. Maur. 493; C. Chr. Ind. 466.

Mahé, Gardiner! Silhouette, near the summit, Gardiner! “ Epiphytic, notable

climber.”

Distribution. Through tropical Africa to Cape Colony, and especially common in the

South-east African islands.

CHRISTENSEN—FERNS OF SEYCHELLES AND ALDABRA 413

17. NEPHROLEPIS CORDIFOLIA (Linn.), Presl; Baker, Fl. Maur. 493; C. Chr. Ind. 453.—

NV. tuberosa, Presl; Kuhn, Bot. v. Ost-Afr. 69.

Seychelles, teste Baker. A cosmopolitan tropical species.

18. NEPHROLEPIS BISERRATA (Sw.), Schott; C. Chr. Ind. 453.—N. exaltata, var. biserrata,

Baker, Fl. Maur. 493.

Mahé, Silhouette, Long Island, Bird Island, Gardiner !

19. HumaAta REPENS (Linn. f.), Diels; C. Chr. Ind. 354.—Davallia pedata, Sw.; Baker,

Fl. Maur. 468.

Mahé and Silhouette, Gardiner! Climber, dominant near the tops of trees; also in

moss of the highest jungle in open places, Morne Pilot, 2700 feet, Mahé.

Distribution. From the South-east African islands through tropical Australia and

Asia to Japan.

20. DAVALLIA CH#ROPHYLLOIDES (Poir.), Steud.; C. Chr. Ind. 208.—D. elata, Baker, FI.

Maur. 469. D. denticulata, var. intermedia, Mett.; Kuhn, Fil. Afr. 158.

Mahé and Silhouette, Gardiner! Common in jungle, everywhere. In Silhouette it

is said to be “a glacis fern, growing in moister holes in the rock.” The fertile frond is

densely glandulose throughout. The species is an African representative of and nearly

related to the Asiatic and Polynesian D. denticulata (Burm.), Mett.; it is known from

tropical West Africa, Natal, the Comoros, Madagascar, Mauritius, Rodriguez, and the

Seychelles.

21. MICROLEPIA SPELUNC# (Linn.), T. Moore; C. Chr. Ind. 428.—Davallia spelunce,

Baker, Fl. Maur. 469.

Mahé, Gardiner! Thomasset !

Cosmopolitan in the tropics of the Old World.

22. ODONTOSORIA CHINENSIS (Linn.), J. Sm.; C. Chr. Ind. 464,—Lindsaya chinensis,

Mett.; Kuhn, Fil. Afr. 67. Davallia tenuifolia, Sw.; Baker, Fl. Maur. 469.

Seychelles (fide Baker, not seen),

Distribution. From Japan through tropical Asia and Polynesia and again in the

South-east African islands,

23. SCHIZOLOMA ENSIFOLIUM (Sw.), J. Sm.; ©. Chr. Ind. 618.—Lindsaya ensifolia, Sw. ;

Baker, Fl. Maur. 472.

Mahe, Gardiner! Thomasset |

Distributed through the tropics of the Old World.

414 PERCY SLADEN TRUST EXPEDITION

24. Linpsaya Kirxit, Hook.; Baker, Trans. R. Irish Acad. xxv. (1875), tab. 28; Fl.

Maur. 473 ; C. Chr. Ind. 394.—Z. Pervillei, Mett.; Kuhn, Fil. Afr. 17 et 68.

Mahé, Gardiner! Thomasset. Silhouette, Gardiner !

Endemic. A large pretty species, common in the islands, growing on the ground and

often partially epiphytic.

25. Linpsaya Hornet (Baker), C. Chr. Ind. 210 (omitted under Lindsaya).—Davallia

Hornet, Baker, F]. Maur. 470.

Mahé, Horne, 677!

Endemic, common fide Horne, but not collected by Gardiner. It is a true Lindsaya, but

a rather problematic species. It is, perhaps, a small form of LZ. Kirkii, with which it

agrees in soral characters and basal scales ; still the shape of the segments is somewhat

different, their lower edge being much upcurved while in LZ. Kirhii it is decurved.

26. DIPLAzIUM SECHELLARUM (Baker), C. Chr. Ind. 238.—Aspleniwm sechellarum, Baker,

Fl. Maur. 491.

Mahé, Bouton! Horne! ‘Common in the damp shady forests,” but not collected by

Prof. Gardiner.

According to Baker also found in Madagascar. I[t is a large, tripinnatifid species,

related to the Asiatic D. polypodioides, Blume, characterized by the muricated rachis.

27. ASPLENIUM NipDUS, Linn.; Baker, Fl. Maur. 491; C. Chr. Ind. 123.

Mahé, Gardiner! Thomasset! Silhouette, Gardiner!

Distribution. Through tropical Polynesia, Australia, and Asia, extending westwards

to tropical West Africa.

28. ASPLENIUM UNILATERALE, Lam.; C. Chr. Ind. 186.—<A. vesectwm, Sm.; Baker, Fl.

Maur. 485.

Seychelles, Kirk!

Distribution. Through the tropics of the Old World.

29. ASPLENIUM LUNULATUM, Sw.; Baker, Fl. Maur. 486.

Mahé, Horne, 404 (not seen).

Distribution. Regarded as a collective species, 4. lunulatwm is widely spread through

the tropics ; the typical form is South African.

30. ASPLENIUM-TENERUM, Forst.; Baker, Fl. Maur. 486; C. Chr. Ind. 134.

Mahé, Horne, 684!

Spread through tropical Polynesia and Asia; it is not aan from the other African

islands.

Rhizoma obliquum, fere 1 cm. crassum, squamis parvis, ovatis, nigrescentibus, subdense

onustum. Stipites numerosi, subapproximati, virides, glabri, complanati, supra late

CHRISTENSEN—FERNS OF SEYCHELLES AND ALDABRA 415

canaliculati, sursum anguste alati, ad 7 cm. longi. Lamina pinnata, lanceolata,

usque ad 20 cm. longa, 5 em. lata, versus apicem pinnatifidum seu grosse serratum,

breviter acuminata, viridis, omnino glabra, textura carnosula. Rachis complanata,

a basi ad apicem alata, alis 1 mm. latis. Pinne numerose, 24 cm. longze, 1 em.

latze, suberectee, inferiores vix abbreviatze, breviter petiolatee, ad rachin articulate,

basi inferiore cuneatee, superiore truncatze, seepe subauriculatze, marginibus apiceque

obtuso grosse serratis. Vene indistinctee, simplices, oblique. Sori mediales, 1-2 mm.

longi, 1 mm. lati, indusiis margine integris.

Silhouette, Gardiner !

This new species resembles the Australian A. obtusatum, Forst., in colour and texture

and the short thick sori, but in general habit it is not unlike 4. tenerwm, from which it

differs in its short sori, fleshy texture, and winged rachis. It is a well-known fact that

‘several pinnate species of Aspleniwm vary extraordinarily in cutting. The most cut

forms are often dareoid, ¢.e. the ultimate segments are narrow with the sori marginal.

Such dareoid varieties look very different from the pinnate forms of the same species,

and they are commonly described as proper species. It has, however, been proved by

botanists who have studied the different forms in the field that certain old species of

Darea really are dareoid forms of species which, in the “normal” state, are pinnate

only. Thus is Darea bifida, Bory, the dareoid variety of A. lineatum, Sw.; D. Belangeri,

Bory, of A. tenerwm. Dareoid forms are especially common in the Mascarenes and

South Africa, and some of them are not known in the pinnate state. My proposed new

species, 4. complanatum, may be the pinnate form of a species which so far is known as

dareoid only, viz. Aspleniwm borbonicum, Hook., a species from Réunion and Mauritius,

but not known from the Seychelles. It is very probable that such is the case, but

I cannot prove it at present, and I therefore think it best to describe the new form as a

new species.

32. ASPLENIUM CAUDATUM, Forst.; Baker, I'l. Maur. 488; C. Chr. Ind. 104.

Mahé, Horne, 668! Thomasset! Silhouette, Gardiner! “A typical fern of the

1000-2000 feet zone in fairly open places.”

Var. minor, C. Chr. (var. nov.):—Lamina 20 em. longa, pinnis 3 cm. longis, 4-1 cm.

latis, apice acutis nec caudatis.

Mahé and Silhouette, Gardiner!

This variety is a very doubtful form, in size and general habit very much resembling

A. pellucidum, Lam., to which species Baker (Fl. Maur. 487) referred a specimen from

the Seychelles (coll. Kirk!). It differs from that species in its lower pinne being not at

all reduced. I think I am right in considering it a small form of 4. caudatum, from

which it differs in its small size and non-caudate pinne, whilst it agrees with it in colour,

texture, pubescence, and other characters. A specimen from Silhouette (Gardiner) is

exactly intermediate between the large 4. cauwdatum and the variety.

A. caudatum is a cosmopolitan tropical species.

SECOND SERIES—ZOOLOGY, VOL. XV. 53

416 PERCY SLADEN TRUST EXPEDITION

Maur. 489.

Mahé, Gardiner! Thomasset |

Distribution. Common in the South-east African islands ; tropical Asia and Polynesia.

It may be a variety of A. cuneatum, Lam., the typical form of which is West Indian.

Some of the leaves are proliferous at the apex (conf. 4. viviparioides, Kuhn).

34. ASPLENIUM BULBIFERUM, Forst.; Baker, Fl. Maur. 489; C. Chr. Ind. 108.

Seychelles, Kirk (fide Baker, not seen).

Whether this is the true 4. bulbiferum, Forst., 1 cannot say. Kuhn did not list

A, bulbiferum as an African species.

35, StENOCHLENA PxERvVILLEI (Mett.), Underw. Bull. Torr. Club, xxxiii. (1906), 49,

fig. 1_—Lomariopsis Pervillei, Mett.; Kuhn, Fil. Afr. 58. Acrostichum sorbifolium,

Baker, Fl. Maur. 513.

Mahé, Gardiner! Thomasset |; common over 1000 feet. Silhouette, Gardiner !; rare

epiphytic climber.

Endemic. The upper base of the sterile pinnz is commonly nearly parallel to the

rachis, and not so cuneate as shown in Underwood’s figure quoted above.

36. STENOCHLENA TENUIFOLIA (Desv.),T. Moore; C. Chr. Ind. 626.—Acrostichum tenu-

folium, Baker, Fl. Maur. 518. Polybotrya tenuifolia, Kuhn, Fil. Afr. 52.

Seychelles, Pervillé, 464 (fide Kuhn, not seen).

Distribution. Tropical and South Africa, with the adjacent islands.

37. CEROPTERIS CALOMELANOS (Linn.), Underw.; C. Chr. Ind. 169.

Mahé, Gardiner !

An American species, probably introduced, as in several tropical countries in the Old

World.

88. Petuza Dontana, Hook.; Baker, Fl. Maur. 477; C. Chr. Ind. 479.

Mahé, Gardiner! Thomasset! Silhouette, Gardiner! “This fern occurs right

down in the mangroves at Grande Barbe.”

Spread through tropical Africa ; not known from the other islands.

39. PrLumA virivis (Forsk.), Prantl; C. Chr. Ind. 483.—P. hastata, Link; Baker, Fl.

Maur. 478. Pteridella viridis, Mett.; Kuhn, Bot. v. Ost-Afr. 16.

Seychelles (fide Baker, not seen).

Through tropical Africa to the Cape and the South-eastern islands.

40. ADIANTUM CAUDATUM, Linn.; Baker, Fl. Maur. 474, part.; C. Chr. Ind. 24.

Seychelles, Kersten, 9 (fide Kuhn, not seen).

Tropical Africa and Asia.

CHRISTENSEN—FERNS OF SEYCHELLES AND ALDABRA 417

41. ADIANTUM RHIZOPHORUM, Sw.; Kuhn, Fil. Afr. 66; C. Chr. Ind. 33.—A. caudatum,

part., Baker, Fl. Maur. 474.

Seychelles, Pervillé, 212 (fide Kuhn, not seen).

Southern Africa and adjacent islands.

42. ACTINIOPTERIS AUSTRALIS (Linn. fil.), Link; C. Chr. Ind. 21.—Pteris dichotoma,

var. elongata, Mett.; Kuhn, Fil. Afr. 80. P. dichotoma, Baker, Fl. Maur. 481. Acti-

niopteris dichotoma, Mett.; Kuhn, Bot. v. Ost-Afr. 68.

Seychelles, Pervillé (fide Kuhn, not seen).

Distributed from Africa with the South-eastern islands to tropical Asia.

43. Preris Barkiya (Hook.), Mett.; Kuhn, Fil. Afr. 77 (as Barkleye)—Pellea

Barklye, Baker, Fl. Maur. 477; C. Chr. Ind. 478.

Seychelles, Kirk! Lady Barkly! Gardiner! (Mahé).

Endemic. A very distinct species, the proper place of which must be in the genus

Pteris. The essential difference between Pellea and Pteris is the different habit; in

soral characters the two genera agree. In Pellea the sterile tips of the fertile segments

are entire, in Pteris nearly always distinctly serrated; in this character the present

species agrees with Péeris. It is perhaps nearest related to Ochropteris pallens (Sw.),

J. Sm., from the Mascarenes, resembling it closely in cutting, but the sori are truly

pteridoid and the rachis is purplish and polished.

44, PTERIS BIAURITA, Linn.; Baker, Fl. Maur. 481; C. Chr. Ind. 593.

Seychelles (fide Baker, not seen).

45. PrERIs BIAURITA, Linn., subsp. P. guADRIAURITA, Retz.; Baker, Fl. Maur. 480.—

P. nemoralis, Willd. ; Kuhn, Fil. Afr. 86.

Seychelles, Kersten, 20 (fide Kuhn). Mahé, Gardiner!

P, biaurita, with its subspecies quadriaurita, is cosmopolitan in the tropics.

46. PYERIS ATROVIRENS, Willd.; Baker, Fl. Maur. 482; C. Chr. Ind. 593.

Mahé, Horne, 652 (fide Baker, not seen),

Spread through tropical Africa ; not found in the other islands of the Indian Ocean.

47. PTERIS TRIPARTITA, Sw.; C. Chr. Ind. 608.—P. marginata, Bory ; Baker, Fl. Maur.

482.

Silhouette, Gardiner! Pervillé (fide Kuhn).

Spread through the tropics of the Old World.

48. Histiopreris tncisa (Thunb.), J. Sm.; C. Chr. Ind. 852.—Péeris incisa, Baker, Fl.

Maur. 483.

Mahé, Gardiner! Pervillé, 75 (fide Kuhn).

Through the tropics and the southern temperate regions.

418 PERCY SLADEN TRUST EXPEDITION

49. LONCHITIS PUBESCENS, Willd. ; Baker, Fl. Maur. 475; C. Chr. Ind. 409.—L. hirsuta,

Kuhn, Bot. v. Ost-Afr. 10.

Seychelles, Kirk (fide Baker, not seen).

Through tropical and Southern Africa, with the Eastern islands.

50. MonoGRAMMA GRAMINEA (Poir.), Schkuhr; Baker, Fl]. Maur. 501; C. Chr. Ind. 430.

Seychelles, Pervillé (fide Kuhn and Baker, not seen).

Confined to the Seychelles and Mascarenes.

51. VITTARIA ELONGATA, Sw., var. ENSIFORMIS (Sw.).— V/V. ensiformis, Sw.; C. Chr. Ind.

653. V. plantaginea, Bory; Kuhn, Fil. Afr. 55. V. elongata, Baker, Fl. Maur. 471.

Silhouette, 2000 feet, Gardiner!

The variety is probably confined to the Mascarenes and Seychelles ; the species, in

several forms, is widely spread through the tropics of the Old World.

52. VITTARIA ISOETIFOLIA, Bory; Kuhn, Fil. Afr. 55; C. Chr. Ind. 654.—V. lineata,

Baker, Fl. Maur. 471.

Mahé, Gardiner! Thomasset! Silhouette, Gardiner !

South Africa and adjacent islands. The determination is rather doubtful.

53. VITTARIA SCOLOPENDRINA (Bory), Thwait.; Baker, Fl. Maur. 471; C. Chr. Ind. 655.

Mahé and Silhouette, near the summit, Gardiner!

Distribution. From Mozambique through tropical Asia to Samoa.

54. ANTROPHYUM IMMERSUM (Bory), Mett.; Baker, Fl. Maur. 509; C. Chr. Ind. 60.

Seychelles | fide Baker, not seen).

Mascarenes, Seychelles, and Malesia.

5b. ANTROPHYUM CALLIFOLIUM, Blume; C. Chr. Ind. 59.—4A. reticulatum, Baker, FI.

Maur. 509.

Mahé, Horne, 683! Silhouette, near summit, very scarce, Gardiner!

Distribution. Malesia, Polynesia, Seychelles.

According to Mettenius’s description in Ann. Mus. Lugd.-Bat. iv. 171, this is A. calli-

folium, not A. reticulatum (Forst.), Kaulf.

56. HyMENoLEPIS sPrcATA (Linn. fil.), Pr.; C. Chr. Ind. 356.—Acrostichum spicatum,

Linn. fil.; Baker, Fl. Maur. 514.

Seychelles (fide Baker, not seen).

Spread through the tropics of the Old World, continental Africa excluded ; common

in the South-east African islands.

57. Potypopium PerviLet, Mett.; Kuhn, Fil. Afr. 150; Baker, Trans. R. Irish Acad.

xxv. tab. 314; Fl. Maur. 504; C. Chr. Ind. 552.

Mahé, Pervillé! Gardiner! On rocks in streams or damp tree-trunks over 1000 feet.

Endemic.

CHRISTENSEN—FERNS OF SEYCHELLES AND ALDABRA 419

58. PoLYPODIUM SERRULATUM (Sw.), Mett.; Baker, Fl. Maur. 504; C. Chr. Ind. 563.

Mahé, Thomasset !

Distribution according to Hieronymus (‘ Hedwigia, vol. xliv. 80) :—Tropical America

(common), tropical West Africa, Madagascar, Mascarenes, Seychelles.

59. PoLYPODIUM ALBOBRUNNEUM, Baker, Fl. Maur. 505; C. Chr. Ind. 508.—P. sechel-

larum, part., Baker, Fl. Maur. 505.

Mahé, Horne, 681! 682! Gardiner! Thomasset! Silhouette, near the summit, scarce ;

epiphyte high up on trees.

Endemic.

P. sechellarwm, Baker, was founded partly on asmall sterile plant from Mahé (Horne,

n. 194) and partly on a single leaf from Mauritius (Lady Barkly), both of which I have

seen. The description in Fl. Maur. is evidently written from the Mauritian specimen,

which belongs to a species distinct from P. albobrunneum. The specimen from Mahé is,

I have no doubt, only a small sterile plant of P. albobrunneum; some of the rather

numerous specimens collected by Gardiner agree exactly with it. P. sechellarwm, Baker,

is thus not known from the Seychelles, and the name therefore is very inappropriate.

60. PoLypopIUM cULTRATUM, Willd., var. ELASTICUM (Bory).—P. elasticum, Bory.

P. asplenifolium, var. minor, Mett.; Kuhn, Fil. Afr.146. P. eultratum, Baker, FI.

Maur. 505.

Mahé, on tree-trunks over 2000 feet, rather scarce, Gardiner! Thomasset !

P. cultratum (type) is a tropical American species, and is also found in the island of

Fernando Po, Guinea. The variety elasticum is apparently confined to the Mascarenes

and Seychelles. It is very like the type, especially some of its smaller forms, but it is

more hairy, with longer and shorter hairs mixed on the upper surface and along the

margins.

61. PotypoprumM PUNCTATUM (Linn.), Sw.; C. Chr. Ind. 557.—P. irioides, Lam. ; Baker,

Fl. Maur. 507.

Mahé, Thomasset !

Through the tropical regions of the Old World.

62. PotypopiumM pHyMaAtTopES, Linn.; Baker, Fl. Maur. 508; C. Chr. Ind. 553.

Mahé, Gardiner! Thomasset! Bird Island, in dry places, Fryer! Long Island,

Gardiner! Silhouette, Gardiner!

Distribution. From South Africa through tropical Africa, Asia, Australia, and

Polynesia to Corea.

63. CycLopHorus sPrssus (Bory), Desy. ; C. Chr. Ind. 201.—Polypodium spissum, Bory;

Kuhn, Fil. Afr. 153. P. adnascens, Baker, Fl. Maur. 506.

Seychelles (fide Kuhn and Baker, not seen).

South Africa and the Eastern islands; scattered through tropical Asia.

4,20 PERCY SLADEN TRUST EXPEDITION

64. ELAPHOGLOSSUM MARTINICENSE (Desv.), T. Moore, var. optusuM, C. Chr. (var. nov.).—

Acrostichum simplex, var. martinicense, Baker, Fl. Maur. 510.

Mahé, Horne, 676! Gardiner! Not uncommon in Mahé and Silhouette (Horne).

Differs from the typical 2. martinicense of the West Indies, which certainly

is specifically different from #. simplex, by the shortly acute or rounded-obtuse apex of

the lamina (not long and gradually acuminate) and by the long decurrent base of the

sterile frond, the stipe being winged nearly to the base. Sterile lamina 10-20 cm. long

by 1 cm. broad, very coriaceous; fertile lamina shorter but of the same breadth on a

much longer stipe. This variety may be the same as Acrostichum lineatum, Kubn

(Christ. Mon, Elaph. 146), from Madagascar, but that is said to have a stipe 10 cm. long.

Other similar forms are found in tropical West Africa. The true Z. martinicense is

probably confined to the West Indian islands.

65. ELAPHOGLOSSUM CONFORME (Sw.), Schott; C. Chr. Ind. 304.—<Acrostichum conforme,

Sw.; Baker, Fl. Maur. 511.

Mahé and Silhouette, Gardiner!

Through the tropical regions.

66. ELAPHOGLOSSUM LATIFOLIUM (Sw.), J. Sm.; C. Chr. Ind. 309.—Acrostichum lati-

folium, Sw.; Baker, Fl. Maur. 511.

Mahé and Silhouette, Gardiner !

I follow Baker in referring the fern in question to Z. latifolium, which by some

authors is considered an exclusively American species. I really cannot see how the

specimens can be safely distinguished from the American form. Christ, in his

monograph of the genus, refers all the large glabrous forms of Hlaphoglossum from

the South-east African islands to £. Sieberi (Hook. & Grev.); but that species is said to

have linear-subulate, almost black scales; our specimens have, however, light brown

lanceolate scales, resembling those of the genuine Z. latifolium. I am inclined to

believe that the form from the Seychelles is just the same as Acrostichwm ellipticum,

Fée, Acrost. tab. 4, referred by Baker to L£. Steberi; Fée describes the scales as

“ aurantiaco-rufidulis.” It resembles also very much the Javan Z. callifoliwm (Blume),

T. Moore. Kuhn (Bot. v. Ost-Afr. 69) lists #. Sieberi among the ferns of the Seychelles,

but his 4. Sieberi is no doubt the same as Z. latifolium as understood here.

Li. latifolium is widely distributed in tropical America; a form very much resembling

that from the Seychelles is known from the Comoros.

67. ELaPHoGLOssuM Hornet, C. Chr. (sp. nov.). (Pl. 25, figs. 4-7.)

Syn.: Acrostichum viscosum, var. glabrescens, Baker, Fl. Maur. 512 (non A. glabrescens, Kuhn).

Rhizoma breviter repens, paleis rufis crispis anguste linearibus subintegris dense

onustum. Stipites dense fasciculati, stricti, parce paleacei denique nudi, 1-2 mm.

crassi, 5-7 cm. longi. Lamina sterilis lanceolata, usque ad 35 cm. longa, medio

4 cm. lata, apice breviter attenuata, acuta, basi longe cuneata, papyracea vel sub-

coriacea, preeter costam paleis minutis rufis laceratis subtus parce ins:ructam ubique

CHRISTENSEN—FERNS OF SEYCHELLES AND ALDABRA 421

nuda. Vene plerumque fureate, intra marginem callosam apicibus subclavatis

desinente. Lamina fertilis similis, 15-17 cm. longa, 2 cm. lata, stipite longiore

(10 cm.).

Mahé, Horne, 171! (type), Gardiner! Silhouette, 2000 feet, Gardiner !

I cannot agree with Baker in regarding this as a variety of H. petiolatum. It differs

from that species in its much larger leaves, its glabrous surfaces, and the different scales

of the rhizome. In #. petiolatum the scales are dark brown, glossy, very narrow, and

nearly hair-like. In general habit our new species resembles not a little . flaccidum.

68. ELAPHOGLOSSUM PETIOLATUM (Sw.), Urb., var. sALIcIFOLIUM (Willd.).—Acrostichum

salicifolium, Willd. A. viscosum, Baker, F]. Maur. 512.

Mahé and Silhouette, Gardiner !; apparently common.

Most specimens are rather densely clothed all over both surfaces with minute pseudo-

stellate scales.

E. petiolatum type is common in tropical America; the variety is frequent in the

South-east African islands, and Kuhn refers specimens from tropical West Africa to it.

Very similar forms occur in Southern China and the Himalaya (A. neriifolium, Wall.).

69. ELAPHOGLOSSUM SPATHULATUM (Bory), T. Moore; C. Chr. Ind, 316.—<Acrostichum

spathulatum, Bory ; Baker, Fl. Maur. 512.

Mahé, Horne (fide Baker, not seen).

Distribution. South Africa with the adjacent islands, Ceylon, tropical America.

70. ACROSTICHUM AUREUM, Linn.; Baker, Fl. Maur. 514; C. Chr. Ind. 5.

Seychelles; Mahé, Gardiner! Silhouette, Gardiner! Bird Island, Fryer! Aldabra

Group, near Pte. Hodone, &. Dupont, 36 !

71. PLATYCERIUM BIFURCATUM (Cav.), C. Chr. Ind. 496.—P. alcicorne, Baker, Fl. Maur.

515.

Seychelles (fide Baker, not seen).

East Africa and islands, Australia and New Caledonia, Lord Howe Island.

As suggested in my ‘Index,’ it is uncertain whether this East-African Platyceriwm is

the same as the true P. bifurcatum from Australia,

PARKERIACE.

72. CHRATOPTERIS THALICTROIDES (Linn.), Brongn. ; C. Chr. Ind. 169.

Mahé, Anse Royale, and Terné, Gardiner! Silhouette, Grande Barbe, Gardiner!

New to the Seychelles. The true C. thalictroides is widely distributed through the

Old World tropics, and according to Benedict (Bull. Torr. Club, vol. xxxvi. (1906) 469)

it is probably confined to the Old World, the American forms belonging to three

different species.

422 PERCY SLADEN TRUST EXPEDITION

GLEICHENIACEA.

73. GLEICHENIA LINEARIS (Burm.), C. B. Clarke; C. Chr. Ind. 322.—G. dichotoma,

Baker, Fl. Maur. 460.

Mahé, Silhouette, and Long Island, Gardiner !

Common through the tropical and subtropical regions of the Old World, and closely

related forms occur in tropical America.

SCHIZHACEA.

74, ScHIzHA DierTaTa (Linn.), Sw.; C. Chr. Ind. 616.—S. digitata, var. intermedia

(Mett.), Baker, Fl. Maur. 516.

Mahé, Gardiner!

This is the genuine S. digitata, a species widely distributed through tropical Asia and

Polynesia, but, so far as Africa is concerned, known from the Seychelles only. The

locality Madagascar is doubtful. Baker referred the Seychelles specimens to 8. inter-

media, a species from New Caledonia distinetly different from S. digitata by having the

sporangia intermixed with long paraphyses.

MARATTIACE.

75. MARATTIA FRAXINEA, Sm. ; C. Chr. Ind. 414.

Mahé, Gardiner! New to the group.

Distributed through the tropics of the Old World.

76. ANGIOPTERIS EVECTA (Forst.), Hoffm.; Baker, Fl. Maur. 517.

Mahé and Silhouette, Gardiner!

Widely spread through the Old World tropics.

OPHIOGLOSSACE.

77. OPHIOGLOSSUM PENDULUM, Linn.; Baker, Fl. Maur. 517; C. Chr. Ind. 471.

Mahé, Gardiner! Thomasset! Silhouette, Gardiner! Apparently common.

Tropical Asia, Australia, and Polynesia, the South-east African islands, but not known

from the African continent.

78. OpHioGLossum PALMATUM, Linn.; Kuhn, Fil. Afr. 178; C. Chr. Ind. 471.

Seychelles, Pervillé (fide Kuhn, not seen).

Florida and tropical America; Madagascar, Réunion, and Seychelles.

EXPLANATION OF PLATE 25.

Fig. 1. Asplenium complanatum, natural size. Fig. 5. Portion of frond, showing venation.

2. Portion of pinna enlarged, showing sori. 6. Part of fertile frond, enlarged.

3. Sporangium, enlarged. 7. Sporangium, much enlarged.

4. Elaphoglossum Hornei, natural size.

PrERcy SLADEN TRUST EXPEDITION. Trans. Linn.Soc.Sger. 2. Zoo. Vou.XV.P1.

(Christensen )

M. Smith del. West, Newman imp.

J.N.Fitch ith.

‘1-3 ASPLHENIUM COMPLANATUM. 4-7 BELAPHOGLOSSUM HORNEI.

No. XXV.—DIPTERA, PSYCHODIDA.

By THE Rev. A. E. Eaton, M.A., F.E.S.

(CommunicaTED BY Pror. J. STANLEY GarpINER, M.A., F.R.S., F.L.S.)

(Plate 26.)

Read 16th January, 1913.

Or this Family of the Diptera eight species were obtained in the Seychelles by

Mr Hugh Scott, and a ninth on the distant island of Aldabra by Mr J. C. F. Fryer. Six

of the nine are new and admit of description ; two were published long ago; and the one

remaining can only be placed in its genus at present. The nine species are :

Brunettia indica, sp. nov. Philosepedon humeralis, Hoffmann.

Panimerus scotti, gen. et sp. nov. Philosepedon triungulatus, sp. nov.

Notiocharis insignis, gen. et sp. nov. Telmatoscopus fryeri, sp. nov.

Psychoda alternata, Say. Sycorax, sp.

Psychoda solitaria, sp. nov.? :

So far as they are now known, the genera of the whole Family can be assorted into

four principal Groups, by referring to the wings and antenne. These Groups, not

necessarily of the status of Sub-Families or Tribes, contain nearly related forms and

distant kindred, like a chart depicting archipelagoes with solitary outliers. In the

Seychelles two of these Groups only are represented. For reference a figure (Pl. 26, fig. 1)

is given of a wing of a $ fly selected out of another Group, and lettered in accordance

with Comstock and Needham’s terminology of nervures.

This figure (Pl. 26, fig. 1) resembles the neuration of wings of all of the genera (except

Sycorax) in the collection in one particular: the anterior basal cell is bounded in front

by the main stem of the radial sectors, almost exclusively, so close to the wing-roots does

R* branch off from R'. But the first six of the genera all (except Notiocharis) have

wings apically pointed at the end of #’; and none of the eight (except Panimerus) has

the Sectorial Fork pedicellate to the anterior basal cell.

Brunettia is an Indo-Malayan genus, nearly related to the European genus Pericoma

Halid., Walk., Ins. Brit. Dipt. vol. iii. p. 256 (1856); as restricted by Eaton, Ent. M.

Mag., ser. 2, vol. vil. p. 121 (June 1897).

Panimerus, represented by several species in Europe and North Africa, contains the

Baltic Amber insect named Pericoma formosa by Meunier, Ann. Mus. Nat. Hungarici,

iii. p. 243, pl. 7, figs. 1 and 2, antenne ¢ and ¢ (1905).

Notiocharis may be endemic to the Seychelles.

SECOND SERIES—ZOOLOGY, VOL. XV. 54

424 PERCY SLADEN TRUST EXPEDITION

Philosepedon and Psychoda seem to be fossil in Baltic Amber (cf: Meunier, op. cit.,

pl. 7, figs. 5 and 6) under the names Psychoda oxyptera Loew, and Psychoda eocenica

Meun., respectively.

The Aldabran Telmatoscopus very likely frequents still or slowly moving waters.

No citation can be made of American Psychodidae, because they have not yet been

assorted.

The seventh genus (Sycorax) represented in the collection belongs to a different

group, which is outlined on pp. 430—431.

Brunettia, Annandale. (PI. 26, fig. 2 a—f and fig. 3 a—f.)

Brunettta Annandale, Records Ind. Mus. vol. v. part 8, pp. 141—144, pl. 12

(Sept. 1910).

Diplonema Annandale, Journ. Asiatic Soc. Bengal, vol. iv. p. 353 (1908) and

Records Ind. Mus., vol. iv. p. 39 (1910); nec Loew (1845).

Distinguished from Pericoma, restrict., by the subsequent radial sectors branching

at acute angles unilaterally from &* within approximately the basal 4 of the wing’s

length ; wing-markings of small white scale spots by the ends of most of the nervures ;

wing-membrane in f to a large extent densely squamate beneath with thin longitudinally

striate scutiform or cuneate scales; joints of the antennal flagellum furnished each with

a pair of long narrow flattened articular appendages tapering gradually to their points,

laxly sub-spiral and widely arcuate, that reach to the base of the following joint ; and by

the inferior ¢ genital appendages having indefinitely numerous capillaceous tenaculee with

expanded tips. Number of joints in the antenne, and place of the apical extremity of the

wing varying with the species. Type Brumettia superstes Annandale, and one other

species described. Distribution : Indo-Malaysia and the Seychelles.

1. Brunettia indica, sp. nov. (Pl. 26, fig. 2 a—f and fig. 3 a—f)

Antennz 15-jointed in both sexes: Ist joint in g very little shorter than the next

two combined ; 2nd globular; 3rd subequal to the fourth, fusiform—urceolate in outline

with slight gibbosity, followed by gibbous obclaviform or pernoid joints; 14th oval;

15th rounded, apiculate. Wings ? ovate, acute; four veins strong, f’, R*, R* and Cu’;

the other radial sectors, the median and Cw! basewards attenuated and the vein A thin:

* branching from F?* a little nearer to the fold of deflection than to the axil of the

sectorial fork ; the pedicel of this fork } the length of the pedicel of the median fork,

and 4th the length of R* Post radial plica strong, widely gaping; anterior basal cell

linear, ill-defined, almost filled up by the thickened base of #* and the spur of R*; cross-

vein & to M faint: marginal area sphenoid with base oblique, and its costal border nearly

straight, heavily fringed ; beyond this the costal fringe is denser than that of the opposite

margin, but shorter. Wing of a rich brownish black, with purple and greenish satiny

gloss; some whitish bristling hair on the usual nervures in approximately the basal 4 of

the wing, and squamz beneath on the membrane of the basal $. Nine small marginal

spots, one at the end of every vein except Sc and A, formed of white linear scales laid

EATON—DIPTERA, PSYCHODID/Ai 425

lengthwise, are probably a generical feature; on each margin the two nearest to the base

are slightly larger than the others. Legs brownish black with white markings :—a white

gloss at the knee; a whitish gleam down the upper half of the tibia, and a white scale-

spot on the exposed side of its tip; also a narrow oblique annulation, broadened on one

side in the hind foot, at the apex of the 1st joint in the tarsus. The tibial bristles take

a white gloss. Indumentum of the head and thorax in ¢ generally concolorous with the

predominant tint of the wings; in 3g, parts take a white gloss, e.g. the sepia-black-brown

palpi, the frontal scales and scales on the inner side of the basal joints of the antennee ;

indumentum of the pronotum and in front of the wing-roots is also liable to a light gloss.

Abdomen (in contrast with the scutellum and metanotum) smooth haired ; the hairs long

and silky, of the prevailing dark hue. Superior genital appendages in ¢ similar (viewed

broad-side) to the upper part of a bird’s head: protopodite longer than broad, rounded

externally ; exopodite produced obliquely along the articulation, faleate or subulate with

decurved tip garnished with two minute, erect, preapical setulz ; endopodite wanting,

unless present in the guise of an upper penis-cover composed of two strong oblique-

pointed, acuminate spines, grooved longitudinally within, and extended laterally at the

base, flanking a pair of short compressed subulate blades produced from the termination

of the ductus ejaculatorius, subtended by a short, subacute, triangular lobe, (?) lower

penis cover, that is not to be confounded with the obtusely sub-triangular terminal lobe

projecting to the rear beyond the insertions of the inferior genital appendages.

Wings of ? ovate lanceolate: R* branching from R* midway between the axil of the

sectorial fork and the fold of deflection; marginal area (subtended by #’) narrower than

the maximum breadth of the space between Cu* and the inner margin.

Loc. Seychelles. Mahé: Cascade Estate, about 800 feet, many examples, from

windows of house, &c.; near Morne Blanc, about 800 feet. Silhouette: plateau of Mare

aux Cochons, over 1000 feet, [X. 1908, 1 specimen. Also known from India; Matheran,

W. Ghauts, Bombay, 800 m. (Bird, 8. VII. 1902: ex Mus. Nat. Hung., Budapest, by

favour of Dr Kertesz). Prep., Eaton, no. 44, a—f/.

Panrmmervs, gen. nov. (PI. 26, fig. 4).

Wings obovate—lanceolate, acute at /*, the costa arcuate in a less degree than the

opposite margin, and the endings of veins posterior to the apex rather wider apart than

those of the radius and its branches in most cases: anterior basal cell extended beyond

the fold of deflection ; pedicel of the sectorial fork weakly attached to this cell, usually

at some point interior to the cross-vein R to M, seldom subopposite thereto in individual

flies (cf. P. hirtus; Prep. Eaton, no. 47, d and k): sectorial fork longer than the median,

and extending inwards deeper than the middle of the wing, except in the Algerian

species P. nadorensis, sp. nov. (Prep. Eaton, no. 51 a) which has these forks of almost

equal length, reaching to about the wing’s middle ; cubital fork sessile ; cross-veins some-

what vague; f°’ sometimes shortly prolonged into the basal cell. _Wing-membrane nude ;

the nervures beneath, to a distance from the roots differing with the species, clad in

$ flies with narrow-linear or linear-lanceolate distichous scales narrowed basally to a short

54—2

426 PERCY SLADEN TRUST EXPEDITION

stalk ; bristling hair rather capillareous; in ? as usual, the indumentum of the nervures

is more hair-like throughout. Wing-markings chiefly dark hair-spots at the ends of

nervures, not extended into the fringe; some dark hair, constituting either spots by the

sectorial and median forks, or a transverse fascia thereabouts, skirted externally in most

of the species with a narrow space of whitish-glossed outward spreading hair; also the

ranks of bristling hair, whitish or opalescent, and in some instances a few additional dark

hair-spots interspersed ; fringes for some distance around the wing’s apex light-glossed ;

dark elsewhere. Prothoracie air-tubes claviform, retained by the ¢, deciduous in the

aged. Antenne 16-jointed; ¢ Ist joint elongate claviform, subequal in length to the

next three joints combined; 2nd joint densely squamate like the first, pyriform, or

inversely triangular and truncate like the butt-end of a gun-stock, and ciliated along the

outer edge with long acicular spinules contrasted in their light colour with the dark,

obtuse scales, which spinules tend to be fasciculate distally ; 3rd joint according to stand-

point shortly fusiform-ovoid, fusiform-urceolate, or somewhat truncate-biconical, subequal -

in length to the fourth joint but with a shorter neck ; 4th—14th joints lageniform with

ovoid, not quite symmetrical bulbs, each with a small sensory pore on the more pro-

tuberant side above the zone of hair, and with a single pair of long setiform articular

appendages (used perhaps for adjusting, from within, the whorl of hairs and for the

alignment of joints) inserted close together beside the pore and reflected apart with a

wide twisted curve towards the opposite side of the joint, slanting upwards; 15th joint

either sub-globular, ovoid, or oblong, closely approximated to the apiculate bulbous

16th joint. In antennz of $, long, dense, setaceous scales on one side of the Ist joint,

that reach as far as the whorl of hairs of the 4th joint, serve as a check to the obovoid

2nd joint, which has no tuft of acicular spinules; 3rd joint asymmetrical, narrowly

amphoroid or vase-shape with sloping shoulder and short neck, or fusiform urceolate.

Protopodite in ¢ superior genital appendages stout, rounded externally; exopodite

expanded at the articulation, unciform or falcate ; endopodite (#) a long, curved, subulate

spine. Inferior appendages short, little longer than the segment: tenacular spinules

numerous if distributed along the whole length of the forceps-limb, but if subapical fewer

and of graded lengths, the longest shorter than the limb. Ovipositor rostrate: sub-

genital plate in 2 ending in a deep median sinus flanked by obtuse lobes.

Type Panimerus hirtus (Linn.) (notabilis Eaton), the only species previously described

out of 4 Palearctic species and 1 species from the Seychelles, sub mand.

2. Panimerus scotti, sp. nov. 2. (Pl. 26, fig. 4.)

Wings dark ashen-grey with fringes of the same colour from the base to the end of

FR on the costa, and to the hair-spot at the end of Cu’ on the opposite margin; from

thence to the apex with somewhat cupreous-, or dull gold-glossed fringes, “shot” with

the aforesaid grey to a large extent; and on the disk with black hair-spots set off with

white hairs, viz.:—(in addition to some ill-defined dark markings close to the wing-roots)

a dark rounded spot in the depression near the cross-vein Sc to R*; another at the end of

this depression, between #' and the costa; 7 spots marking endings of ranks of bristling

hair, set off with a few spreading white hairs externally (namely on the veins R’, R*, Rs

EATON—DIPTERA, PSYCHODID A 427

M, at the median fork, opposite the spot on R*, Cu’ and A); and at the margin of the

disk 8 small spots of spreading hair at the ends of nervures preceded by some white

hairs invaded by the coppery gloss of the fringe in the apical portion of the wing,—

amounting altogether to 9 blackish spots or tufts on the disk and 8 clear of the fringe

along the margin or 17 in all: #* and F* lacking the terminal dark spots. Abdomen and

under parts of head and thorax blackish; its dense suberect dorsal hair frosted with

white at the tips of the hairs when turned about. Pubescence of the upper parts of head

and thorax whitish, or greyish-white with white-tipped hairs, according to standpoint ;

frons and palpi, from in front, greyish-brown or blackish. Antennz brown; scape with

impure whitish-glossed, light brown scales; hair of flagellum whitish-warm sepia grey,

shifting to impure white with change of standpoint. Legs light brownish-grey shifting

to blackish, and adorned with impure white scale-markings, viz.:—a small spot or narrow

edging externally at the tibio-tarsal joining ; a narrow apical annulation on the first tarsal

joint (metatarsus) ; the 2nd joint wholly whitish; the last 3 joints black-scaled, more or

less tinged with dull testaceous in certain aspects, and from other standpoints glossed

throughout with whitish, Wing 2 mm. long.

Loc. Seychelles. Mahé: from near Morne Blanc, about 800 feet, 29. Feélicité:

XII. 1908, 19. g unknown. Prep., Eaton, no. 49 a, wing denuded.

NorrocuaRris, gen. nov. (Pl. 26, fig. 5 a—/).

Wings ovate-lanceolate, subacute apically between R* and F*; cross-veins obsolescent ;

anterior basal cell vaguely indicated, about 4th of the wing’s length; pedicel of the

sectorial fork nearly twice the length of the part of the stem between the sectors R* and

R*; cubital fork shortly petiolate ; vein A short, and nearly straight.

Antenne in ¢ (if not defective) 12-jointed; Ist joint elongate, somewhat triquetrous,

on one side protuberant and scale-clad at the tip, longer than the third ; 2nd joint ovoid,

ample, shorter than the next, squamate; 3rd joint, subcylindrical, slender, equal in

length to the 4th and 5th joints combined, and beset with crowded verticels of long

curved spreading hair nearly throughout ; the succeeding joints ovoid-fusiform with long

subverticelate curved hairs spreading much in the same fashion as in Panimerus or

Clytocerus ; 12th joint Indian-club-shaped, approximated to the eleventh.

Genitalia imperfectly explored; inferior ? appendages subequal in length to their

s q gs

basis; tenacular setze wiry and numerous; the longest nearly as long as the limbs.

3. Notiocharis insignis, sp. nov. (Pl. 26, fig. 5 a—f).

Wings with conspicuous hair-markings, in part black, blackish grey, light yellow and

in part white; viz.:—a narrow basal band at the roots, impure whitish; a broad band

extending from near the fold of deflection outwards to the end of FR! on the costa and to

that of Cu‘ on the inner margin, subtransverse basally, oblique apically, and widest

posteriorly, occupying the greater part of the disk, and enclosing 3 small but con-

spicuous snow-white spots formed of depresso-convex scales lying lengthwise clear of the

fringe, and placed at the wing-margin outside the ends of vein A and of the two cubital

428 PERCY SLADEN TRUST EXPEDITION

veins on a darkened ground, black or blackish. The exterior edge of this dark band

anteriorly defines the outer limits of 6 of the usual 8 series of dark horrescent hair ;

its posterior fringe, taleose-glossed, is reinforced by linear black scales about 4 the length

of the long hairs of the fringe ; and in the disk, anterior to the 1st cubital vein, the dark

tint is somewhat lightened by an admixture of whitish hairs on the veins, so that from

some standpoints the colouring appears to be light blackish grey. From the costa to R*,

or just beyond, the dark band is skirted by a narrow abbreviated stripe of spreading

white hair, widened in the costal fringe. Apical remainder of the wing-veins clad with

old gold or golden brown hair, glossed with gold, and with a few black hairs at the nearer

parts of the radial sectors, and some of a dark colour that enter the costal fringe in the

neighbourhood of #* and of R*. Wing-fringe matching in colour the adjacent part of the

disk, but liable to shift from glossy yellowish to whitish, with a talcose gloss.

Head and thorax light yellowish-testaceous, with pale flaxen pubescence ; a cluster

of minute narrow black scales on the meso-pleuron, and some on the prominent veins

beneath the wings at the roots. Abdomen blackish brown, with somewhat harsh and

partly erect dorsal hair,—part inclined over appressed elongate scales inserted towards

the bases of segments. Genitalia and their hair in 3 dull light-hempen brown. Antennze

concolorous with the head ; when shifted about, some of the scales at the tip of the basal

joint become blackish, and the flagellum towards the extremity, like the palpi, assumes

a greyish or light brownish-grey tint. Legs glossy cream-coloured ; broadly fuscescent-

grey; at the tip of the tibia, and narrowly at the apex of the Ist tarsal joint on the

exposed side in the hinder legs; and with the terminal joint black or black-brown. The

long spreading hair-like tibial bristles, and some hairs on some of the tarsal joints shift

with change of posture from flaxen to brownish and black. Wing 1°75 to 2 mm. long.

Loc. Seychelles. Mahé: near Morne Blanc, about 800 feet, 1 3. Mare aux

Cochons district, about 1500 feet, I—II. 1909, 53, 29. Prep., Eaton, no. 61 a, b.

The specimens from the Mare aux Cochons district were caught (2. II. 1909)

in a swampy place shaded by Hugenia-trees and great Pandanus Horne, near a

mountain-stream. They were flying near partly dried up pools among dead Pandanus-

leaves (Scott).

Psycuopa Latr. (1796), et auct.; restricted Eaton (1904).

Type Psychoda alternata Say. Out of 9 or 10 species sub mand, 3 have been

described :—Psychoda phalenoides Latr., P. alternata Say, and P. albipennis Zett.—

Distribution: Tropical and Temperate regions: 2 occur in the Seychelles.

4. Psychoda alternata, Say (1824).

Psychoda seapunctata, Curtis (1839).

Loc. Seychelles. Mahé: Cascade Estate, about 800 feet, 11 examples (pinned).

Prep., Eaton, no. 70.

A species widely dispersed: N. America, Europe, Africa N. and 8., India, New

Guinea and Australia.

EATON—DIPTERA, PSYCHODIDAH 429

5. Psychoda solitaria, sp. nov. ¢ (Pl. 26, fig. 6 a—d).

This is one of some doubtful species related closely to Psychoda albipennis Zett.

in colour and structure (if indeed distinct) having ovate wings pointed at the end of R’,

an ill-defined anterior basal cell, the sectorial fork sometimes incomplete, the 1st joint in

the antenna shorter than the next two combined, the 3rd joint equal in length to the

4th and like most of the joints in the flagellum lageniform with a rounded or napiform

base and a subfiliform neck. Gonopods geniculate ; protopodite subequal in length to the

exopodite.

In Psychoda albipennis (Pl. 26, fig. 7 a—d), joint no. 13 in the antenna is followed

by two diminutive rudimentary joints; no. 14 visible only under a high power, is

colourless, narrow and small; no. 15, sub-globular or ovoid and dark. Length of wing

0-9 to 1°8 mm.

Loc. Europe from Scandinavia to the Basses Pyrénées. Prep., Eaton, no. 76.

Psychoda solitaria (P1. 26, fig. 6 a—d) appears to differ in having joint no. 14 of

the antenna also sessile but terminal, and subglobular with an apiculus. The question

of identification arises in connection with the possibility of this appearance being mis-

leading. Length of wing 1:15 mm.

Loc. Seychelles. Mahé: Cascade Estate, about 800 feet, 33 specimens (carded).

Prep., Eaton, no. 76 A.

PHILOSEPEDON, Eaton (1904).

Differs from Psychoda in having no bristling hair on F'; obtuse external §

genitalia, and the ovipositor being not rostrate. Appendages of ¢ inferior genitalia

few tenaculate.

6. Philosepedon humeralis (Hoffmann); Meig.

A single ? fly agrees with the European insect.

Loc. Seychelles. Mahé: Cascade Estate, about 800 feet.

7. Philosepedon triungulatus, sp. nov.

Four flies, carded similarly to the preceding, and obtained at the same locality, differ

from it in being darker in the wing-membrane (the hair is largely destroyed) ; and the ¢

apparently has 3-tenaculate (not 2-tenaculate) inferior genital appendages; the tenacule

equal and divergent, otherwise similar to the corresponding parts in Philosepedon

humeralis, so far as can be seen.

Loc. Seychelles. Mahé: Cascade Estate, about 800 feet.

TeLtmatoscopus, Eaton (1904).

As constituted hitherto, there are 14 species sub mand ranked in this genus, 12 of

which have been described ; but of some only one of the sexes is known. ‘The terminal

joint in the ¢ 16-jointed antenna is not relatively diminutive in comparison with its

predecessors, and the 3rd joint equals the 4th in length. Wings ovate-lanceolate ;

pedicel of the sectorial fork inserted in or at the anterior basal cell. Tenacular spinules

of the inferior genital appendages of ¢ numerous.

430 PERCY SLADEN TRUST EXPEDITION

A few species have wings apically acute exactly at the end of R*; the insertion of

the pedicel of the sectorial fork in the basal cell quite as far from the cross-vein R to M

as the cell’s apical width; and Ist joint in the antenna of the $ shorter than the combined

lengths of the 2nd and 3rd joints. TZ. advena rothschildix and meridionalis, Katon

(cf. Ent. M. Mag., January 1912). Preps. Eaton, nos. 94—96.

The remaining species have the wing’s apex sub-acute or acute between the veins

R‘ and R’, or it is divided asymmetrically by &’, the costal portion exceeding the lower.

They can be roughly assorted thus :—

Axil of the sectorial fork nearer than that of the median fork to the base of the

wing. TZ. fraterculus and labeculosus, Eaton. Preps. nos. 84 and 85.

Axils referred to equidistant from the base of the wing. 7. ustwlatus, Hal. MBS.,°

Walker (1859), morulus and ambiguus, Eaton. Preps. nos. 86—88.

Axil of the sectorial fork nearer than that of the median fork to the wing’s apex.

T. soleatus, Halid., Walk., decipiens and consors, Eaton. Preps. 91—93 and 3 species

sub mand not named, including the one obtained at the island of Aldabra.

8. Telmatoscopus fryert, sp. nov.

@ (dried).—Wings of a somewhat light sepia-grey, with fringes to match, glossed

with impure creamy-whitish at the apex from about the end of R* to that of WM’, and

4 small spots standing in an almost straight,

with black-hair markings on the disk, viz. :

slightly oblique line with one another at the ends of ranks of bristling hair, and a 5th at

the end of the subcosta; of these the outermost (at the axil of the sectorial fork) stands

very little farther from the wing-roots than the three others: and besides these, at the

ends of the veins are small blackish spots of appressed spreading hair that do not

contribute to the fringe ; wing-margin outlined in black. Legs and nearly all of the left

antenna deficient. Ovipositor pitch-brown. Length of wing 2 mm.

Loc. Aldabra, 1908—9 (Fryer): a single defective specimen was brought back by

the Seychelles Expedition.

The seventh genus represented in the collection belongs to a different group, the

Group of Trichomyia and Sycorax, which is outlined below.

Basal cells cuneate at the base; the anterior bounded in front for nearly half its

length by the primary trunk of the radius R', and then deeply recessed,—a cross-vein

linking to the trunk the common stem of the sectors and blending with the stem;

R* suppressed. Wings obovate, rounded apically and widely at the end of k*. Antennze

15-jointed ; 3rd joint longer than the scape or than the 4th joint ; joints of the flagellum

mostly filiform or pastiniform. Palpi short ; the last joint firm.

This group contains 3 genera, one of which is represented in the Seychelles collection:

they are as follows :

a. Anal vein long (3 long veins follow the median fork) :

(i) Eatonisca, Meunier (1905), from Baltic amber ; sectorial fork sessile upon the

anterior basal cell.

(ii) Trichomyia, Halid., Curtis (1839), Walker (1856); sectorial fork stalked,

EATON—DIPTERA, PSYCHODIDA 431

proboscis short, palpi shorter than the head. Type, 7. urbica, Europe, the only

species.

aa. Anal vein obsolete or reduced to an abbreviated rudiment that is not continued

to the wing-margin (2 long veins follow the median fork).

(iii) Sycorax (see below).

Sycorax, Haliday; Curtis (1839); figured by Westwood in Walker, Ins. Brit.

Dipt. (1856).

Sectorial fork stalked ; proboscis short ; palpi shorter than the head. Type, Sycorax

silacea Halid., described: and 2 other species from Germany and Algeria, in addition

to one below from the Seychelles, undescribed, sub manu. Prep., Eaton, nos. 98—100.

Name misapplied in America.

9. Sycorax, sp.

Two carded specimens, too defective for description.

Loc. Seychelles. Mahé: Cascade Estate, about 800 feet.

SECOND SERIES—ZOOLOGY, VOL. XV.

432

Fig.

PERCY SLADEN TRUST EXPEDITION

EXPLANATION OF PLATE 26.

1. Ulomyia fuliginosa Meig., 2 (Europe). Wing-neuration, for reference: A, anal vein; Be, basal

cells, the anterior (Bc!) separated from the posterior (Bc?) by the median vein; C, costa or anterior

margin of wing; Cu, cubital veins, Cu! anterior or upper branch, Cu? posterior branch; M* and

M?, branches of the median vein enclosing the median fork; R?, radius, and R? to R* its branches

the radial sectors, of which R? and R* enclose the sectorial fork; Sc, subcosta. Cross-veins are

cited by quoting the lettering of the veins they link together: e.g. the cross-vein Sc to R', Opposite

this cross-vein a plait or fold in the wing-membrane, shown by a dotted line, often causes difficulty

in ascertaining precisely the place of insertion in R‘ of the pedicel of the sectorial fork, without

first denuding the wing thereabouts: and cross-veins are sometimes hardly visible, x 38.

2. Brunettia indica, sp. nov., f: a, wing (denuded), x 50; b, antenna (denuded), x 110; ¢, halter ;

d, superior genital appendage, viewed laterally; e, inferior genital appendages, x 110.

. 3. Brunettia indica, sp. nov., 2: a, antenna (denuded), x 110; 6, palpi; ¢, anterior, and d, posterior

leg, x 45; e, ovipositor ; f, sub-genital plate, x 100.

. 4. Panimerus scotti, gen. et sp. nov., $: wing, denuded but with the positions of the dark hair

spots indicated, x 33.

g.5. Notiocharis insignis, gen. et sp. nov., g: a, wing (denuded), x 45; b, antenna; c¢, anterior,

and d, posterior leg (denuded), x 45; e, inferior genital appendage; /, tenacular spines of inferior

genital appendage under pressure.

6. Psychoda solitaria, sp. nov.?, f: a, antennal joints 1—4; 6, antennal joints 11—14; c, gonopod;

d, inferior genital appendage, x 110.

7. Psychoda albipennis Zett., f, for comparison with Psychoda solitaria ; a, antennal joints 1—4;

b, antennal joints 11—15; c, gonopods and penis; d, inferior genital appendage, x 110.

PERCY ae ms EXPEDITION. TRANS. LINN. Soc.,SER.2.Z00L.VOL, XV. PL. 26.

ATON

—————————

AE. Eaton del. E.Wilson, Cambridge

DIPTERA, PSYCHODIDA.

No. XX VI.—EPHEMERID &.

By THE Rey. A. E. Earon, M.A., F.E.S.

(ComMUNIcATED BY Pror. J. STANLEY Garpiner, M.A., F.R.S., F.L.S.)

(1 Text-figure.)

Read 16th January, 1913.

A SINGLE species of this Family was obtained by the Seychelles Expedition. The

genus Hagenulus represented by it was previously known from Cuba and the Tenasserim

Valley (cf: Eaton, 1882 and 1892); but the habits of the flies were unrecorded.

Hacenutus Eaton, Ent. M. Mag., vol. xviii. 1882, p. 207; Revisional Monograph*

of Recent Ephemeride, Trans. Linn. Soc. London, ser. 2 (Zool.), vol. 11. 1888, pp. 83, 113,

Pl 15, figs. 21 bis.

1. Hagenulus scotti, sp. nov.

A. Wings of H. scotti, 2? im., not fully flattened ont; the fore wing

4mm. long. B. Hind wing more enlarged.

Subimago (dried). Wings light grey, the neuration subopaque or piceous, but

nowhere dark-bordered.

Imago (dried and carded). Cross-veinlets about 9 or 10, simple and nearly straight,

in the pterostigmatic portion of the marginal area, but evanescent or wanting before the

* In the “ Analysis” at the end of this Monograph, on p. 313, it is stated that in Hagenulus “at the

roots of the fore wing the Ist Axillar (9') meets the 2nd Axillar nervure.” An examination of the wing of the

Seychelles species shows that it would be more correct to say that the Ist Axillar meets or almost meets the 2nd

Axillar nervure.

55—2

434 PERCY SLADEN TRUST EXPEDITION

bulla; generally absent from the terminal margin ; less numerous in the disk than in the

type-species. Caudal setze 3, equal, more than twice the length of the body. Costal

projection of the hind wing subacute, roughened apically with minute setule. Thorax

brown ochreous; the point of the scutellum may be of a bright yellow. Abdomen in

segments 1—7 translucent white, outlined narrowly along the apical edges of the segments

with black or piceous, the dark edging blending with a small triangular spot of the same colour

on each side where tracheal branchize were inserted in the nymph ; and sometimes a small

dot is visible at the base of the segment on each side: segments 8—10 and the base of the

forceps, also the caudal setee white. Hinder legs white or whitish, with a black or fuscous

spot (sometimes lacking) at the tip of the tibia, and two bands (or a submedian spot and

an apical band) of a like colour on the femur: fore femur wholly, or only in its distal half,

tinged with fuscous or bistre grey, not concealing the bands, and sometimes with a dark

short streak at its base. Genitalia ¢ difficult of delineation from carded specimens ;

? egg-valve produced and conspicuous as in H. caligatus Hag. MS., the type-species.

Length of wing 4 and of sete about 10 mm.

Twenty-nine carded specimens include 8 # and 3 ? subim.; and 15 3, 3 2 im.

Loc. Seychelles. Mahé: near Morne Blanc, about 800 feet; Cascade Estate,

800 feet and over; Mare aux Cochons district, about 1500 feet. One of the specimens

from near Morne Blanc was caught in the afternoon in a ravine (13. X. 1908); others,

from the same locality, at sunset (10. XI. 1908) in a swampy hollow containing pools,

long grass, wild palm-trees, &c. Some of the Cascade specimens were obtained in the

morning (10. I. 1909) from dense undergrowth of fern, &c., in a shady valley filled

with palm-forest (Scott).

No. XX VII.—ODONATA.

By Herpert Campion.

(CommuNIcATED BY Pror. J. Stantey Garpiner, M.A., F.R.S., F.LS.)

Read 16th January, 1913.

THE Dragonflies collected by the first (1905) Percy Sladen Trust Expedition to the

Indian Ocean, which I have had under review, were reported upon by Mr F. F. Laidlaw

(Trans. Linn. Soc. London, ser. 2, Zool., xii. pp. 87—89, 1907), and his report included a

statement of the literature which he had consulted.

The majority of the Odonata which form the subject of the present paper were

obtained by Mr Hugh Scott in the Seychelles Archipelago during eight months ending

in March, 1909. Simultaneously, Mr J. C. F. Fryer, who accompanied Mr Scott to the

Indian Ocean, explored the island of Aldabra, and obtained Pantala flavescens Fabr.,

Tramea basilaris Pal. de Beauv., Anax tristis Hag., Lestes ochraceus Selys (forma), and

Ischnura senegalensis Ramb. Mr H. P. Thomasset, in addition to taking an active part

in the collecting in Mahé, presented a pair of Lestes ochraceus (forma) taken by himself

in Cosmoledo in 1907. Finally, Mr R. P. Dupont, Curator of the Botanic Station in

Mahé, also assisted Mr Scott during his visit to that island, and moreover made a

collection in the island of Assumption in 1910, after the return of the Expedition to

England. His collection consists of the following species :—Dzplacodes lefebvrei Ramb.,

Philonomon luminans Karsch, Pantala flavescens Fabr., Rhyothemis semihyalina Desj.,

Tramea basilaris Pal. de Beauv., and Tramea limbata Des}. (forma).

Although no species new to science were discovered, there has to be recorded a new

and remarkable case of structural dimorphism affecting the 2 of Agriocnemis pygmaea

Selys (Synopsis). Beyond this, the female of Gynacantha stylata Martin has been found,

and other interesting additions have been made to our knowledge of the forms inhabiting

the islands. The occurrence of Philonomon luminans and of a representative of the

Subfamily Lestinz in those islands appears to be now recorded for the first time.

Apparently, the only Dragonfly previously published from Aldabra was the almost

cosmopolitan Pantala flavescens, and I believe that hitherto the Odonate-fauna of

Assumption and Cosmoledo has remained entirely unknown.

I have much pleasure in acknowledging my indebtedness to two Continental experts,

for kind assistance rendered by them in the preparation of this report. Dr F. Ris, of

Rheinau, Switzerland, has obligingly given me the benefit of his unrivalled knowledge

436 PERCY SLADEN TRUST EXPEDITION

of the Libellulinze in connection with the less-known species falling into that Subfamily :

he has also devoted much time to the study of the Agriocnemis from the Seychelles.

Monsieur René Martin, of Paris, has been so good as to identify several other species

belonging to a Dragonfly-fauna with which he is so well acquainted. His valuable paper

on the ‘‘ Odonates des Iles Séchelles” (Mém. Soc. Zool. France, ix. pp. 101—112 (1896))

has also been freely consulted. Moreover, frequent use has been made of the monographs

by both these specialists which are appearing in the Selysian Catalogue (“Collections

Selys ”).

The subjoined list enumerates not only the species collected in 1908—1910 in

Seychelles, Assumption, Aldabra, and Cosmoledo, but also such additional species as

I have found to be recorded elsewhere from the same islands. It may be added that

Dr Philip P. Calvert mentions a male Dragonfly in the United States National Museum

collection, from the Seychelles, collected by Dr W. L. Abbott, which may belong to

Agrion insulare Selys (Proc. U.S. Nat. Mus., xviii. p. 142 (1895)). Notices of species not

represented in the present collection are enclosed within brackets. No attempt has been

made to state the full synonymy of the species discussed, but the original descriptions

are always cited, and reference is also made to the Selysian Catalogue in all those cases

where the present incomplete state of that great work has permitted of this being done.

Libellulide. Libelluline.

1. Orthetrum stemmale wrighti (Selys).

Lnbellula wrightia Selys, Ann. and Mag. Nat. Hist. (4), iii. p. 272 (1869).

Orthetrum stemmale wrighti Ris, Coll. Selys, Libell., fase. x. p. 219 (1909).

Loc. Seychelles. Mahé: 5 g (Dupont); 2 3, Cascade Estate; 3 2, Long Island,

VIL. 1908; 1 f, 1, taken in coitu, Port Glaud, 5. XI. 1908. Silhouette: 8 3, 42, plateau

of Mare aux Cochons, IX. 1908. Bird Island: 1? (Fryer), VII. 1908. Dennis Island :

1 ¢ (Fryer), VIII. 1908. Praslin, 1905. Coetivy, 1905.

The younger males in the series closely resemble the females in the matter of

coloration, but when full maturity has been attained the yellow markings on the face,

thorax and abdomen are entirely obscured by blue pruinosity ; even the yellow terminal

appendages take on a bright purple colour. One or two aged females also tend to become

pruinose. This is the Seychellean form of a species occurring on the Continent of Africa

(O. stemmale capense), in Madagascar (O. stemmale lemur), and in Mauritius and Réunion

(O. stemmale stemmale). De Selys (op. cit. p. 273) mentioned wrighti as occurring also in

Mauritius, but Ris (loc. czt.) has referred this insect to the typical form, O. stemmale

stemmale.

According to Mr Laidlaw’s report, a long series of O. wrighti were obtained from

the Chagos Archipelago by the Expedition of 1905. No specimens from that locality,

however, are now discoverable in the collection, but the data which he quotes are found

to apply to a certain number of specimens of Diplacodes trivialis, a species which

Laidlaw failed to record at all from Chagos. So far as our knowledge goes, therefore

the Seychelles Islands remain the sole habitat of O. stemmale wrighti.

CAMPION—ODONATA 437

2. Diplacodes lefebvrer (Ramb.).

ee lefeburii Ramb., Ins. Névr., p. 112 (1842).

Tnbellula tetra Ramb., op. cit., p. 119 (1842).

Diplacodes lefebvrer Ris, Coll. Selys, Libell., fase. xii. p. 465 (1911).

Loc. Assumption Island: 1 ¢ (Dupont), 1910.

Rambur’s Libellula lefebvrii, described from Egyptian females, and Libellula tetra,

representing the Mauritian male, are considered by Dr Ris to be conspecific, and tetra

becomes a mere synonym of /lefebvriz. The species is recorded from numerous localities in

Africa, and from Asia Minor, Arabia, Sokotra, Madagascar, Mauritius, and Réunion.

3. Diplacodes trivialis (Ramb.).

Libellula trivialis Ramb., Ins. Névr., p. 115 (1842).

Diplacodes trivialis Ris, Coll. Selys, Libell., fase. xii. p. 468 (1911).

Loc. Seychelles. Mahé: 3 3,19 (Dupont). Silhouette: 9%, 62, plateau of Mare

aux Cochons, IX. 1908; 12, Mont Pot-a-eau about 1500 feet, VIII. 1908. Praslin, 1905.

Coetivy, 1905.

A common East-Indian species, known also from Suez and Queensland.

4. Philonomon luminans (Karsch).

Sympetrum luminans Karsch, Berl. Ent. Zeitschr., xxxviil. p. 22 (1893).

Philonomon lumanans Ris, Coll. Selys, Libell., fase. xiii. p. 697 (1911).

Loc. Assumption Island; 3 ¢ (Dupont), 1910.

A widely-distributed species in Africa ; the British Museum possesses single specimens

from Zanzibar and Abyssinia.

5. Pseudomacromia luctifera (Selys)*.

Zygonyx (*) luctifera Selys, Ann. and Mag. Nat. Hist. (4), iil. p. 273 (1869).

Schizonyx luctifera Karsch, Berl. Ent. Zeitschr., xxxiil. p. 281 (1890).

Loc. Seychelles. Mahé: 1 ¢, Morne Blanc, 800 feet, 1908; 1¢, Long Island, VII.

1908; 22 (Dupont). Praslin, 1905.

The following particulars are given in view of the variability of the species in respect

that the triangle and subtriangle in the forewing may be either free or traversed :—

In all the specimens the anterior triangles are free. In one male the subtriangle in the

left forewing is 1-celled, becoming 2-celled, while in the right forewing it is 2-celled ; in

another male the subtriangle in both forewings is 2-celled, and in the remaining male and

in the female it is 3-celled.

Various opinions have been held respecting the true systematic position of this

endemic species, but Dr F. Ris informs me that he has now come to the conclusion that

it should go into Pseudomacromia, an African genus already including two species from

Madagascar which he considers to be the nearest allies of the insect before us. The

British Museum possesses a pair (¢ and ?) presented by Monsieur René Martin in 1900.

* See postscript, p. 446.

438 PERCY SLADEN TRUST EXPEDITION

[6. Zyxomma petiolatum Ramb.

Zyxomma petiolatum Ramb., Ins. Névr., p. 30, pl. 2, fig. 4d (1842).

Zyxomma sechellarum Martin, Mém. Soc. Zool. France, ix. p. 103 (1896); Laidlaw,

Trans. Linn. Soc. London, ser. 2, Zool., xii. p. 89 (1907).

Loc. Seychelles and Chagos Islands, 1905.

Not represented in the present collection.

Concerning this species Dr Ris has written to me as follows :—‘“I cannot find

any appreciable difference between specimens from the Seychelles and a series from

Borneo and another from Cape York which I possess. The differences are in size, which

is variable, and in colour of wings, which is variable according to maturity.” I may

add that I had arrived independently at the conclusion that Martin’s insect could not

be separated specifically from Rambur’s. |

7. Tholymis tillarga (Fabr.).

Iibellula tillarga Fabr., Ent. Syst., Suppl., p. 285 (1798).

Loc. Seychelles. Mahé: 1 $ (Dupont). Praslin, 1905.

A common East-Indian species, recorded, inter alia, from Mauritius and Réunion.

8. Pantala flavescens (Fabr.).

Tibellula flavescens Fabr., Ent. Syst., Suppl., p. 285 (1798).

Loc. Seychelles. Mahé: 2 ¢ (Dupont); 2 ¢, 1?, Long Island, VII. 1908; Praslin,

1905. Aldabra: 10 3, 39 (Fryer). Assumption: 4 ¢, 8 ? (Dupont), 1910.

“In Aldabra this species began to be seen in December, beginning of wet season”

(Fryer).

A Dragonfly of exceptionally wide distribution, occurring in all the warmer parts of

the world, but not in Europe.

9. Rhyothemis semahyalina (Desj.).

Inbellula semihyalina Desj., Rapport Soc. Maurice, i. (1832).

Loc. Seychelles. Mahé: 2 g, 8 ? (Dupont); Praslin, 1905; Coetivy, 1905.

Assumption Island: 1 ¢ (Dupont), 1910.

A species described from. Mauritius, and known also from various parts of Africa.

10. Tramea basilaris (Pal. de Beauv.).

Tibellula basilaris Pal. de Beauv., Ins. Afr. Amér., p. 171, t. 2, f. 1 (1805).

Loc. Aldabra: 1 ¢ (Fryer). Assumption Island: 1 ¢ (Dupont), 1910.

This African species has been recorded from Madagascar and the Glorioso Islands,

and the British Museum Collection contains specimens from Bechuanaland, Mashonaland,

Natal, the Congo, and the Gold Coast. There are certain other specimens in the same

collection, from Ceylon, which I consider should be referred to this species, rather than to

the Indian form, 7. burmezstert Kirby.

CAMPION—ODONATA 439

11. Tramea limbata (Desj.), forma.

ae lumbata Desj., Rapport Soc. Maurice, i. (1832).

Tibellula mauriciana Ramb., Ins. Névr., p. 34 (1842).

Tramea limbata Calvert, Proc. U. 8. Nat. Mus., xviii. p. 121 (1895); Ent. Nachr.,

Xxl. p. 217 (1896).

Tramea continentalis Selys, Mitth. Mus. Dresd., iii. p. 299 (1878); Martin, Mém. Soe.

Zool. France, ix. p. 102 (1896); Laidlaw, Trans. Linn. Soc. London, ser. 2, Zool., xii. p- 88

(1907).

Tramea madagascariensis Kirby, Trans. Zool. Soc. London, xii. p. 317 (1889).

Loc. Seychelles. Mahé: 423, 39 (Dupont). Silhouette: Mare aux Cochons, 1 3,

19, IX. 1908. Praslin, 1905. Coetivy, 1905. Assumption Island: 3 2, 1 @ (Dupont),

1910. Chagos Island, 1905.

Dr Ris has very kindly given me a very full statement of his views, not yet published,

respecting Zramea limbata and the various geographical forms which it assumes. The

species was originally described from Mauritius, and under the single specific name Dr Ris

has gathered together numerous forms, usually regarded as distinct species, ranging from

Dakar in Senegal on the West, to New Caledonia and Samoa on the East. Restricting

ourselves to the area with which we are at present more directly concerned, it may be

said that, while the particular specimens to which the names continentalis Selys (from

Dakar) and madagascariensis Kirby (from Madagascar) were applied by their authors are

themselves sufficiently distinct from each other and from typical limbata, nevertheless,

specimens may be produced from both of these localities which closely resemble each other,

and to that extent differ from the typical forms of their respective habitats. For this

reason the use of the names continentalis and madagascariensis is attended with great

difficulty, and it seems to be preferable, for the present at all events, to designate as

T. limbata (forma) any specimen falling within the limits of variation of the species, but

not agreeing exactly with the typical form from Mauritius.

Viewing as a whole the series obtained by the two Percy Sladen Trust Expeditions,

we see how variable the species is in respect of the size and form of the reddish-brown

basal spot on the hind wings. Thus, in the three males from Assumption Island (1910)

the basal spot is bounded externally by an almost straight line drawn downwards from the

cubito-anal cross-vein. Some of the Seychelles males are similar to these, but in others

the basal patch extends a little further outwards, while in two males from the Chagos

Archipelago (1905) the spot is very nearly as full as it is in typical limbata from

Mauritius. There is also variation in respect that the spot may either continue to the

hind margin of the wing or else curve inwards at some point before the margin is reached.

In the females the spot is not less variable. In at least one of them (that from

Silhouette) it encloses a large hyaline space and is decidedly convex outside. It is

interesting to note how nearly some of the females approximate towards the specimen

from Madagascar which Mr W. F. Kirby presumed to be the female of his maduagas-

cariensis. In addition to variability in this respect, one of the females, from Mahé,

has 8 antenodal cross-veins in each hind wing, instead of the normal number of 7.

SECOND SERIES—ZOOLOGY, VOL. XV. 56

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440 PERCY SLADEN TRUST EXPEDITION

Corduliine.

[12. Hemicordulia similis (Ramb.).

Cordulia similis Ramb., Ins. Névr., p. 147 (1842).

Hemicordulia delicata Martin, Mém. Soc. Zool. France, ix. p. 105 (1896).

Hemicordulia similis Martin, Coll. Selys, Cord., fase. xvii. p. 14 (1906).

Not represented in the collection.

Hemicordulia includes several generalised members of the Subfamily, found in the

Oriental, Australasian, and Oceanic regions; but, although it is represented in Madagascar

by two species, one of them being H. similis, it is not known to occur on the Continent of

Africa. |

Aéschnidee. Aischnine.

13. Anaw tristis Hag.

Anaz tristis Hag., Verh. zool.-bot. Ges. Wien, xvii. p. 35 (1867); Ris, Ann. Soc. Ent.

Belg., lv. p. 320 (1911).

Anaz goliath Selys, Rev. Zool., xxiii. p. 178 (1872); Martin, Coll. Selys, Aesch.,

fasc. xvili. p. 15 (1908).

Loc. Aldabra: 19, Basin Cabri, Picard Island (Fryer).

This huge Dragonfly, to which Ris (loc. cit.) has lately restored the name ¢ristis, is

widely spread over the Continent of Africa, and occurs also in Madagascar.

14. Anax guttatus (Burm.).

Aeschna guttata Burm., Handb. Ent., ii. p. 840, n. 14 (1839).

Ana guttatus Martin, Coll. Selys, Aesch., fasc. xviii. p. 23 (1908).

Loc. Seychelles. Mahé: 4 ¢ (Dupont).

A species widely distributed in the Oriental Region, and occurring also in Queensland,

but not recorded from Continental Africa.

15. Hemianax ephippiger (Burm.).

Aeschna ephippigera Burm., Handb. Ent., ii. p. 840, n. 15 (1839).

Hemianaz ephippiger Martin, Coll. Selys, Aesch., fase. xviii. p. 28 (1908).

Loc. Seychelles. Mahé: 1 9, Cascade Estate.

Common both in Africa and Asia.

16. Gynacantha stylata Martin.

Gynacantha stylata Martin, Mém. Soc. Zool. France, ix. p. 106 (1896); Coll. Selys,

Aesch., fase. xx. p. 181 (1909).

Loc. Seychelles. Silhouette: 19, Mont Pot-a-eau, about 1500 feet, VIII. 1908;

12, Mare aux Cochons, IX. 1908.

The specimen taken in August had evidently been ovipositing, for the ventral surface

of the terminal segments is coated with brown mud.

CAMPION—ODONATA 441

Gynacantha is one of the dominant genera of Aeschnine, and has numerous repre-

sentatives in Africa, Asia, and America. (‘. stylata was described from a unique ¢ from

Mahé, preserved in M. Martin’s collection, and has been stated by that author to

resemble G'. bispina Ramb., a species occurring in Mauritius, Madagascar, and Africa.

The following particulars of the ?, which hitherto has been unknown, can now be given :—

Total length 68°5 mm. Length of abdomen, including anal appendages, 54°5 to 57 mm.

Coloration of head, thorax, pterostigmata, and legs as in male. Wings faintly tinged with

yellow at the base as far as the triangle; the yellow fills the costal and subcostal spaces

before the nodus, and extends along the costa until the pterostigma is reached. Pterostigma

4°5 mm. in length, surmounting from 4 to 5 cells. Reticulation reddish-brown ; membrane

with copperish glint. The branch of the radial sector departing before the level of the

pterostigma brace-vein. Two cells in subtriangle. Forewing 47 mm. long, and with

22 to 25 antenodal and 18 to 19 postnodal crogs-veins. 5 to 8 cells in triangle.

Hindwing 46 mm. long; 16 to 18 antenodals and 20 to 22 postnodals. Five cells in

triangle. Anal loop with 11 cells (August specimen) or 12 cells (September specimen) ;

supplemental anal loop 5-celled, 6-celled or 7-celled.

Abdomen reddish-brown, with the greenish coloration of the thorax reappearing upon

parts of segments 1, 2, and 3. Segment 9 carrying below a pair of apical two-jointed

filaments. Segment 10 ending above in an obtuse point ; produced below into a tongue

directed backwards and downwards, presenting a glossy-black, triangular, concave surface

dorsally, and terminating with a pair of long, curved, glossy-black spines, forming a fork.

Anal appendages 6°5 mm. long (about the length of segments 8, 9, and 10 taken together),

flat, narrow, lanceolate, clothed with short hairs, reddish-brown. Ovipositor-spine reddish,

very smooth and glossy, curving upwards towards the end of the abdomen, which its

length about reaches, thin, and sharply pointed.

The specimen obtained in September, which may be taken as the type of the 2, has

been placed in the British Museum.

Agrionide. Lestine.

17. Lestes ochraceus Selys (Synopsis) ( forma)*.

Lestes ochracea Selys (Synopsis), Bull. Acad. Belg. (2), xi. p. 325 (1862).

Loc. Aldabra: 8 2, “found round pools in rocks at all seasons” (Fryer). Cosmoledo :

14, 12, 1907 (Thomasset).

For the identification of this species I am indebted to Monsieur René Martin, who

says, however, that he finds some differences between the specimens submitted to him

and those which he considers to represent true ochraceus. He adds that there are, in

Africa, several closely-allied species falling into the ochraceus group.

Lestes ochraceus was described by De Selys from the male sex alone, the habitat

being given as Africa, probably the Cape of Good Hope. The terminal segments of the

abdomen were unknown to De Selys.

* See postscript, p. 446.

442 PERCY SLADEN TRUST EXPEDITION

I think it advisable to give the following brief particulars of the present insect, in

view of the many respects in which it differs from the one described by De Selys :—

g. Length of abdomen, including anal appendages, 34°5 mm. Hindwing 21°5 mm.

in length, with 10 (occasionally 11) postnodal cross nervures. Colour characters rather

variable. Labium yellowish. Labrum greenish-grey. Vertex chocolate. Ocelli garnet

colour. Pronotum mostly yellowish. Dorsum of meso- and meta-thorax chocolate-brown,

with a variable amount of greenish-yellow. Sides and lower surface of thorax yellowish,

with a pair of black rounded spots on the pectus. Femora of forelegs yellowish, bordered

with black; tibize with a median black line on the upper surface. Mid- and hindlegs

yellowish, not lined with black. Tarsi of all legs partly black; claws and spines black.

Wings hyaline; reticulation reddish-brown ; pterostigmata dark chocolate-brown, cover-

ing two cells. Abdomen generally glossy dark brown; segments 1, 2, and 10 partly

yellowish ; 3, 4, 5, and 6 with blackish markings near the apex; 7 largely, and 8 and 9

wholly, blackish ; 8 with numerous dark denticulations on the apical margin. Upper anal

appendages yellow, blackish at the tips, the inner margin with a large sharp tooth above

and two smaller blunt teeth below ; several minute blackish denticulations on the outer

margin ; lower appendages blackish above, about a third of the length of the upper.

?. Length of abdomen 32°5, of hindwing 21°5 mm. Postnodals 11 (in 3 wings) to

12 (left forewing). The single ? in the collection (from Cosmoledo) appears to be an aged

individual, inasmuch as the wings are decidedly smoky, as well as considerably frayed.

The insect generally is darker than the 2, the whole of the face, head, and abdomen being

of a uniform blackish brown. A lighter colour, however, is observable in portions of the

thorax, and the legs are of a warm brown. ‘The anal appendages, which are coloured like

the abdomen, are a little shorter than the 10th segment.

Agrioninz.

18. Allolestes maclachlani Selys.

Allolestes M’ Lachlani Selys, Ann. and Mag. Nat. Hist. (4), iii. p. 275 (1869).

Loc. Seychelles. Mahé: 1 3 (immature), Morne Seychellois, over 1500 feet, 4. IL.

1909 ; 12, Cascade Estate, about 800 feet; 19, from near Morne Blane. Silhouette: 1 2

(immature), Pointe Etienne, low cultivated country, IX. 1908. Praslin, 1905.

19. Allolestes nigra Martin.

Allolestes nigra Martin, Mém. Soc. Zool. France, ix. p. 107 (1896).

Loc. Seychelles. Silhouette: 1 ¢ (mature), Mare aux Cochons, IX. 1908.

The genus Allolestes has Oriental affinities and is confined to the Seychelles, and the

two known species are extremely rare in collections. They are included among the

remarkable Agrionine forms having long pterostigmata, and sectors interpolated between

the principal veins of the wings, as in the true Lestine.

20. Leptocnemis (= Hemicnemis) bilineata (Selys).

Trichocnemis bilineata Selys, Ann. and Mag. Nat. Hist. (4), ii. p. 276 (1869).

Loc. Seychelles. Mahé: 8 3, 29, from near Morne Blanc; 2 g, Cascade Estate; 1 ¢

CAMPION—ODONATA 443

(Dupont). Silhouette: 4%, Mare aux Cochons, IX. 1908; 1 3, Pointe Etienne, low

cultivated country, [X. 1908. Praslin, 1905.

[21. Leptocnemis (= Henucnemis) cyanops (Selys).

Trichocnemas cyanops Selys, Ann. and Mag. Nat. Hist. (4), i. p. 275 (1869).

This species was described by Baron E. de Selys-Longchamps from a male, or males,

taken in the Seychelles by Prof. E. Perceval Wright, but it does not appear to have been

re-discovered by later investigators.

Through the courtesy of Mr H. M’Lachlan, I have had an opportunity of examining

the type ¢, the sole representative of the species, contained in the late Mr R. M’Lachlan’s

collection. Upon comparing it with the type of LZ. bilineata, preserved in the same

collection, and also with specimens taken by the Expeditions of 1905 and 1908—9,

I failed to discover in it any distinctive characters such as would enable me to refer

other specimens to the same species with any degree of certainty.

M. René Martin says of this insect :—‘‘Spéciale aux Séchelles, ot elle doit étre

rare. Peut-étre H. cyanops n’est-il pas une espéce différente de H. bilineata. On trouve

des individus du bilineata qui ont, mélangés, les caractéres assignés par M. de Selys a

chacune des espéces” (Mem. Soc. Zool. France, ix. p. 109 (1896)). |

22. Ceriagrion glabrum (Burm. ).

Agrion glabrum Burm., Handb. Ent., ii. p. 821, n. 18 (1839).

Loc. Seychelles. Silhouette: 6 g, 3 2, Mare aux Cochons, IX. 1908; 4 3, 1 2,

Pointe Etienne, low cultivated country, [X. 1908. Praslin, 1905.

I have seen this pretty brick-red Dragonfly from Madagascar, Sokotra, and from

numerous localities in Continental Africa.

23. Ischnura senegalensis (Ramb.).

Agrion senegalense Ramb., Ins. Névr., p. 276 (1842).

Loc. Aldabra: 1 2 (Fryer).

Widely distributed in the tropical parts of Africa and Asia, and recorded also from

the Seychelles.

24. Agriocnemis pygmea Selys (Synopsis).

Agriocnemis pygmea Selys (Synopsis), Bull. Acad. Belg. (2), xliii. p. 146 (1877).

Agriocnemis exilis Martin, Mém. Soc. Zool. France, ix. p. 110 (1896); Laidlaw,

Trans. Linn. Soc. London, ser. 2, Zool., xii. p. 89 (1907) (nee Selys (Synopsis)).

Loc. Seychelles. Mahé: 1 g, 1 2, marshes on coastal plain at Anse aux Pins and

Anse Royale, I. 1909. Silhouette: 14 ¢, 15 3, Pointe Etienne, low cultivated country, IX.

1908; 1 3, Mare aux Cochons, IX. 1908. Praslin, 1905. Coetivy, 1905.

Dr Ris, who has specially studied the genus, has been good enough to examine the

whole of the Agriocnemis material brought from the Seychelles by the Expeditions of 1905

and 1908—9. He finds that A. ewilis, the species to which Mr Laidlaw referred the

specimens obtained in 1905, is not represented at all. The males are rather large, but

444 PERCY SLADEN TRUST EXPEDITION

all of them belong undoubtedly to A. pygmea, as defined in the Selys-Synopsis. In that

species the male is characterised especially by the very peculiar shape of the inferior anal

appendages, and in that respect our specimens agree perfectly with a series from Colombo,

Ceylon, which Dr Ris has examined, and also with odd specimens from Australia. The

prothoracic lobe is very much the same in all the males which he has studied.

The distinguishing feature of the typical pygmea female is the form of the hind

margin of the prothorax. This form is unique in the genus, the margin being without a

backward prolongation or lobe, almost straight, and with two very minute and very

laterally-placed tubercles, a condition entirely different from that found in the corre-

sponding male. This form of the female Dr Ris has seen from Ceylon, Java, Queensland,

and Sydney.

In addition to the regular males and females just considered, the Percy Sladen Trust

Collections contain a certain number of females which belong to an unknown form. These

females are characterised by the pronotum having a thin, elevated, quadrangular, and very

slightly emarginated median lobe, whereas the normal females are devoid of any lobe

whatever. At first sight, it seemed as if we were dealing here with a distinct species,

but, owing chiefly to the absence of any males which could be referred to a second

species, Dr Ris is now practically certain that these females represent a very curious

and interesting case of structural dimorphism. Structural dimorphism in the same sex,

as distinguished from colour dimorphism, is of rare occurrence in Dragonflies, but Dr Ris

has drawn my attention to another instance afforded by the Mediterranean Aeschnine

Boyeria irene Fonsc., in the female of which the terminal appendages may be either

long or short. Furthermore, in his newly-published monograph of ‘‘ The North American

Dragonflies of the Genus Aeshna,” Dr E. M. Walker figures variations in the length

and depth of abdominal segments 1—4, as well as variations in the length of the anal

appendages, in the females of certain North American species of that genus.

In Agriocnemis, as in the closely-allied genus Jschnura, the females are subject to

rufous dimorphism, and the present species affords no exception to the rule. In the

Seychellean females, therefore, we get two distinct morphological forms, and two colour

phases of each form. The matter may be tabulated thus :—

Hind-margin of prothorax not if Ground-colour of body green, ?a

lobed (forma typica) \Ground-colour of body orange, 2b

Hind-margin of prothorax dis- (Ground-colour of body green, 9c

tinetly lobed (forma nova) eee of body orange, ?d

The four females from Coetivy (1905) are all of the orange, lobed form (2d). The

16 females from Mahé and Silhouette (1908—9) can be grouped in this way :—

“ee Geen

3 jose ve Svoceib ivarate latencies ee el retetoteainele pisvove Ge

8 1 «Se ed nes SR AER EERE CoP ERE Teche ve 2 7 Lobed

1 specimen of uncertain coloration.........

CAMPION—ODONATA 445

The 16 lobed females, therefore, represent as much as 80°/, of the total number of

females collected (20).

The $2 and d are alike in coloration ; and, so far as can be judged from the material

which is available, there are also no colour differences between ?a@ and 9c.

The synonymy of this species is in an unsettled state, and the identity of Rambur’s

pygmea (1842) is very uncertain. It has therefore been deemed advisable, for the purposes

of this paper, to designate the Seychellean insect as the pygmea of the Selys-Synopsis,

where there is a very good description, indicating the structural characters of both sexes.

The distribution of pygm@a is astonishingly wide, extending as it does from the

Seychelles on the West to Australia on the East: such a distribution, unaccompanied

by local modification in different parts of the range, suggests recent and rapid dispersal

of the species.

25. Teinobasis alluaudi (Martin).

Telebasis alluaudi Martin, Mém. Soc. Zool. France, ix. p. 110 (1896).

Loc. Seychelles. Silhouette: 1%, Mare aux Cochons, IX. 1908; 1 ¢, Pointe Etienne,

low cultivated country, IX. 1908. Mahé: 2 ¢, Mare aux Cochons district, about 1500 feet,

I.—II. 1909.

Monsieur René Martin makes the following observations respecting this species (op.

cit. p. 111) :—‘* Parait assez commun & J’ile Mahé, ot le R. P. Philibert a pris un certain

nombre de males et de femelles. Cette espéce, qui n’a jamais été observée qu’i Mahé,

est la seule Te/ebasis qui ne soit pas de |’Asie tropicale et de l’Océanie. Toutes les autres

Telebasis habitent les Philippines, les Moluques, Célébes, la Nouvelle-Guinée, Singapore.

Les espéces les plus voisines de 7. alluwaudi sont la T. lorquint des Moluques, et la

T. rufithorax de Vile dObi.” It will be observed that the present collection contains

specimens from Silhouette as well as from Mahé. It also appears that the species is now

known from Madagascar, for the British Museum possesses a female from the East of that

island, presented by M. Martin in 1899.

I follow Mr W. F. Kirby in retaining the term Telebasis for the New World genus

which De Selys renamed Erythragrion; and for the Oriental genus to which the species

under consideration belongs I adopt the name of Tevnobasis which Mr Kirby has proposed

for it. This course has been taken, in dealing with American Dragonflies, by Prof. P. P.

Calvert and Mr R. A. Muttkowsky, and the reasons for doing so appear to be adequate.

GENERAL CONCLUSIONS.

The collection from the coral island of Assumption might have been made on the

mainland of Africa without occasioning any surprise, as it consists entirely of Libellulinze

belonging to Ethiopian species. The few Dragonflies from Aldabra, another coral atoll,

might also have been obtained in Africa.

When we come to the granitic islands constituting the Seychelles Archipelago,

however, we find the number of purely African species reduced to two, viz. Rhyothemis

semihyalina and Ceriagrion glabrum. Three others are common to the Ethiopian and Oriental

regions: these are 7ramea limbata, Hemianaax ephippiger, and Ischnura senegalensis.

The single Corduliine, at one time thought to be peculiar, is now considered to be

446 PERCY SLADEN TRUST EXPEDITION

conspecific with the Madagascar Hemicordulia similis. Teinobasis alluaudi is another

species which is common to Madagascar and the Seychelles. The forms which are really

peculiar to the Archipelago are Orthetrum stemmale wrighti, Pseudomacromia luctifera,

Gynacantha stylata, Allolestes maclachlani, Allolestes nigra, and Leptocnemis bilineata.

Pantala flavescens belongs to no particular zoogeographical region. The remaining species

appertain to the Oriental fauna, and are as follows :—Diplacodes trivialis, Zyxomma petio-

latum, Tholymis tillarga, Anax guttatus, and Agriocnemis pygmea. An analysis of the

indigenous species and subspecies reveals the interesting fact that the three Anisoptera—

Orthetrum stemmale wrighti, Pseudomacroma luctifera, and Gynacantha stylata—are

allied to forms found in Africa or Madagascar, while the three Zygoptera—Allolestes

maclachlam, A. mgra, and Leptocnenns bilineata—have affinities with Asiatic forms.

It may be taken that the Odonate-fauna of the Seychelles is now fairly well known,

and the apparent deficiencies in it are quite remarkable. For instance, notwithstanding

decided relation with the Oriental region, there is no representative of the characteristic

Asiatic genus Newrothemis (Libelluline). The Libelluline genera Palpopleura, Croco-

thenns, Brachythenis, and Trithemis are also unrepresented, although they occur quite

commonly both in Asia and Africa. Furthermore, it is worthy of remark that the

important Subfamilies Calopterygine and Gomphinz have never been met with.

The presence of larval water-mites (Hydrachnidee) is a very noticeable feature of

some of the specimens of Tramea limbata from the Seychelles, and also of the Tramea

basilaris from Aldabra. In some instances the thorax carries only two or three of the

large ruddy mites, while in other cases the sides and under surface of the thorax are

thickly encrusted with them. It would appear that these Arachnids are not met with

at all commonly upon the bodies of Anisopterous Dragonflies, and one of the few other

cases of the kind which have come under my notice concerns an Australian Tramea.

Sympetrum meridionale Selys furnishes a notorious instance of larval water-mites

clustering in great numbers on the wings of an Anisopterous species, and Mr K. J.

Morton possesses a specimen from Asia Minor whose wings bear not less than 220 of

these curious little creatures. Among the Zygoptera from the Seychelles, at least one

specimen of Agriocnemis pygmea has mites on the sternum. The nature of the relation

subsisting between Acari and their Dragonfly hosts is not at present well understood.

(See on this subject Berlese, Gli Insetti, vol. il. pp. 138 and 26.)

POSTSCRIPT.

Since the foregoing was written (June, 1912), I have seen several recent papers by Dr Ris bearing more or

less directly upon the species discussed, but unfortunately it has not been found possible to insert references to them.

One of these publications is fase. xiv. of the Selysian Catalogue, which includes Dr Ris’ revision of Pseudo-

macromia. The Seychellean Dragonfly originally described as Zygonyx luctifera, and formerly believed to have

affinities with certain Asiatic forms, is now definitely referred to the African genus Psewdomacromia, as fore-

shadowed in the present paper.

Again, the ¢ anal appendages of the species designated herein as Lestes ochraceus (forma) are very similar

to those figured by Dr Ris for Lestes wnicolor, M’Lach., from the River Nile (Gondokoro) and from Madagascar

(Sitzungs. Akad. Wissen. Wien., Mathem.-naturw., exxi., p. 153 (1912)). In connection with the preparation

of my report I compared the type ¢ of L. wnicolor with other males from the Percy Sladen Trust Collection,

and I made a note at the time of this similarity in the matter of the anal appendages, in addition to other

points of agreement between the insects compared. I also found a still closer agreement between the type

9 of L. unicolor and the @ from Cosmoledo. Nevertheless, in view of certain differences which I discovered

and to which I attached some importance, I felt disinclined to identify the series from Aldabra and Cosmoledo

with M’Lachlan’s types from Madagascar.

24 January, 1913. H. C.

No. XXVIII.—LES CARIDINES DES SEYCHELLES.

PAR LE PROFESSEUR EuGcENE L. Bouvisr, F.M.L.S.

(CoMMUNIQUE PAR LE PROFESSEUR J. STANLEY GARDINER, M.A., F.R.S., F.L.S.)

PLANCHES 27—29.

Lu le 16 janvier 1913.

Dans son étude sur les ‘‘ Land and Freshwater Decapoda” recueillis sous la direction

de M. Stanley Gardiner au cours de la “Percy Sladen Trust Expedition,” M. L. A.

Borradaile (1907, 67) signale aux Seychelles deux espéces de Caridines plutdt rares,

Caridina nilotica Roux, ? C. multidentata, Stimpson, et quatre fort communes, les

C. typus Edw., similis Bouvier, brevirostris Stimpson, singhalensis Ortmann. “La

collection, écrit-il, contient un nombre immense dindividus appartenant 4 ces espéces

(les quatre derniéres) qu il est extrémement difficile de séparer les unes des autres &

cause des grandes variations qu’elles présentent sur tous les points dont Bouvier se

sert pour leur diagnose. Je considére comme probable que la distinction de ces espéces

ne sera pas maintenue dans tous les cas. M. Stanley Gardiner serait heureux d’envoyer

les spécimens 4 quiconque voudrait prendre 4 tiche de les examiner pour en faire la

statistique.”

Etant donnés ce passage et les travaux que je consacre depuis prés de dix ans a la

famille atyienne, j’étais en droit de regarder comme personnelle l’invitation précédente.

J’y répondis avec d’autant plus de satisfaction que la variabilité des Caridines semble

hautement suggestive, et que je désirais particuliérement I’étudier sur les especes des

Seychelles. Voil’ comment j’ai pu, grace 4 l'intermédiaire de M. Borradaile, recevoir de

M. Stanley Gardiner les trés nombreuses Caridines de la ‘“‘ Percy Sladen Trust Expedition ”

et réunir les matériaux scientifiques du présent mémoire.

Ce travail a été long et pénible, car j'ai di examiner par le menu et d plusieurs

reprises tous les exemplaires de la collection qui en renferme 3000 & 4000. Mais je

ne regrette pas de l’avoir entrepris, car il comporte deux résultats principaux qui

paraitront sans doute de réelle importance: une refonte compléte de la classification

des Caridines et des notions précises sur l’origine des mutations évolutives dans la famille

des Atyidés. Je remercie M. Borradaile et M. Stanley Gardiner pour leur aimable

obligeance et pour le plaisir qu’ils m’ont procuré en me permettant de mettre en lumiére

des notions scientifiques de quelque valeur.

SECOND SERIES—ZOOLOGY, VOL. XV. 57

448 PERCY SLADEN TRUST EXPEDITION

M. Borradaile n’avait pas exagéré en disant que les Caridines soumises 4 son

examen présentent une variabilité extréme et que cette variabilité aurait vraisemblable-

ment pour conséquence de faire passer en synonymie plusieurs espéces jusqu’alors admises.

En fait, les Caridines seychelloises sont pour la plupart tout 4 fait stables, mais l'une

d'elles varie 4 un tel degré et suivant des voies si diverses qu'on doit y rattacher plusieurs

espéces considérées jusqu’ici comme indépendantes, et qu il faut regarder cette Caridine

elle-méme comme une’‘espéce en pleine période évolutive.

L’espece & laquelle je fais allusion me parait devoir étre rapportée a la Caridina

brevirostris Stimpson. L/identification reste douteuse car le type de Stimpson a été

perdu et la diagnose qu’en a donnée |’auteur présente des lacunes regrettables ; mais cette

diagnose répond de tous points 4 l’espéce que j'ai décrite antérieurement sous le nom de

C. brevirostris et qui provenait également des Seychelles.

La C. brevirostris est représentée par plus de 3000 spécimens dans la collection de

M. Gardiner dont elle forme la majeure partie: j’ai pu |’étudier dans tous ses détails

et en suivre les innombrables variations. C’est & examen de ces derniéres que sera

consacrée la premiére partie du présent mémoire ; j’exposerai ensuite les conclusions que

lon peut tirer de cette étude et je terminerai par une revue rapide des diverses espéces

comprises dans la collection.

LES VARIATIONS DE LA Caridina brevirostris.

La variabilité de la C. brevirostris s'affirme dans toutes les parties du corps, presque

sans exception, mais comme elle atteint son amplitude maximum dans le rostre et dans

les chélipeédes, c’est 14 tout d’abord qu'il convient de 1|’étudier.

VaRIATIONS DU ROSTRE. Comme on le sait depuis longtemps, les Caridines les plus

primitives sont toutes armées d’un trés-long rostre qui se reléve a la pointe et affecte la

forme d’un sabre latéralement caréné, muni en dessus d’une rangée de spinules, et en

dessous d’un certain nombre de denticulations.

Dans les exemplaires de notre espéce qui se rapprochent le plus de ce type, le rostre

(Pl. 27, fig. 2) présente une structure semblable; il atteint ou dépasse légérement l’extrémité

distale des pédoncules antennulaires, mais ne se prolonge pas en une longue pointe et

reste droit ot se reléve & peine dans sa partie terminale. Examiné dorsalement, il montre

une base large, puis devient assez brusquement beaucoup plus étroit; sur les flanes, il

est parcouru de chaque cété par une caréne latérale qui se continue en arriére avec le bord

orbitaire et divise longitudinalement lorgane en deux carénes beaucoup plus fortes: la

caréne dorsale qui est spinuleuse, la caréne ventrale qui est denticulée.

On peut partir de ce type primitif pour suivre les innombrables variations du rostre,

et les grouper autour de trois types essentiels: variations de l’armature, variations des

carénes, variations de longueur et de forme.

1°. Variations de larmature. (PI. 28.) L’armature spinuleuse de la caréne dorsale

peut étre observée dans la majorité des exemplaires, mais elle disparait totalement chez

les autres et l’on observe tous les passages entre ces deux états extrémes. Quand son

développement est maximum (Pl. 27, fig. 2; Pl. 28, fig. 1) elle comprend en moyenne

BOUVIER—LES CARIDINES DES SEYCHELLES 449

13 spinules, qui forment une série commengant trés peu en arriére de l’orbite et se

terminant toujours avant la pointe; ce nombre est rarement dépassé, mais souvent il

reste inférieur et alors la disposition en série présente fréquemment des modifications

profondes. On trouve des individus ot la série se dissocie en fragments (Pl. 28, fig. 2)

d'autres ott elle se réduit 4 un petit groupe de spinules (PI. 28, fig. 12) qui peut occuper

toutes les positions sur la caréne, parfois méme il n’y a plus qu'une spinule (Pl. 28, fig. 10)

dont la position n’est pas moins variable que celle du groupe précédent. On arrive ainsi

& une caréne dorsale inerme par suppression totale des spinules. (PI. 28, fig. 7, 8, 9, 13.)

Le méme résultat est également atteint par atténuation des spinules, qui se réduisent

alors & de petites dents fort peu saillantes. Cette atténuation peut frapper toutes les

spinules (Pl. 28, fig. 5) ou seulement un certain nombre d’entre elles; dans le premier cas,

on est bien prés de la structure qui caractérise les rostres dorsalement inermes. II est

possible que la réduction précédente soit une simple étape conduisant & la disparition des

spinules, mais comme elle est rare, je crois plutét que le rostre peut devenir dorsalement

inerme par deux procédés: la disparition brusque des spinules et la réduction préalable

de ces derniéres 4 l'état de simples denticulations.

J’en dirai autant, pour la méme raison, des denticules de la caréne ventrale. Leur

nombre ne semble guére dépasser 7, il est méme le plus souvent inférieur (Pl. 28, fig. 11) et

varie jusqu’a la disparition compléte de l’armature. Dans certains individus les denticules

sont trés réduits, 4 peine saillants (Pl. 28, fig. 5), ce qui conduit, par une autre voie, d la

disparition compléte de l’armature ventrale.

2°. Variations des carénes. (Pl. 28.) Quelle que soit son armature, la caréne

dorsale persiste presque toujours, plus forte généralement quand elle est armée de

spinules, plus faible dans le cas contraire, surtout quand ce caractére coincide avec une

grande briéveté du rostre; mais il y a des exceptions 4 cette double régle, plusieurs

individus 4 rostre court (Pl. 28, fig. 7) ayant une caréne dorsale bien développée. Je n'ai

vu la caréne totalement disparaitre que chez certains exemplaires ov le rostre se réduisait

4 une simple saillie frontale (Pl. 28, figs. 9 et 10).

Bien plus intéressantes sont les variations de la caréne ventrale. Dans les individus

ot le rostre est en sabre, cette caréne atteint son maximum de hauteur vers le milieu

(Pl. 27, fig. 2, Pl. 28, fig. 1), et se réduit progressivement dans les deux sens pour arriver

au niveau des carénes latérales: en avant, ce niveau est atteint dla pointe méme, en arriére

prés de la base des pédoncules optiques. Toutefois, méme dans les individus ov le rostre

est en sabre, cette disposition n’est pas toujours réalisée: dans certains cas, la caréne

ventrale n’est apparente que dans la moitié antérieure ou dans une région peu étendue de

la partie antérieure du rostre (PI. 28, fig. 11), parfois au contraire elle reste apparente,

quoique en s'atténuant, jusqu’au niveau d’insertion des pédoncules oculaires (Pl. 28, fig. 12).

Les mémes observations s'appliquent aux cas bien plus nombreux ow le rostre, plus ou

moins court, n’affecte plus la forme d’un sabre; alors, il est méme des individus ov la

earéne ventrale s’exhausse en arriére (PI. 28, figs. 6 et 7), d’autres ot elle présente au

milieu son maximum de hauteur; des observations de cette nature peuvent étre faites

jusque sur des spécimens dont le rostre est beaucoup plus court que les pédoncules

oculaires. Quelle que soit la longueur du rostre, il arrive enfin que la caréne ventrale

57—2

450 PERCY SLADEN TRUST EXPEDITION

disparaisse et alors le rostre devient plat en dessous, et recoit presque exclusivement sa

forme des carénes latérales que nous allons étudier (Pl. 28, figs. 9, 10, 13, 14, 15).

3°. Variations de lonqueur et de forme (P1. 28). Les carénes latérales, en effet, sont

toujours bien développées, méme chez les exemplaires oti le rostre devient rudimentaire.

La régle, qui ne comporte aucune exception, cest qu’elles s'atténuent de la base &

lextrémité, leurs bords formant un angle dont le sommet se trouve & la pointe du rostre ;

les différences proviennent de la direction des cétés de langle et de la longueur du

rostre.

Dans la trés grande majorité des cas les carénes latérales convergent beaucoup plus &

la base qu’au sommet du rostre. I] en résulte que ce dernier, vu du cdté dorsal, présente

la forme d'un triangle dont le sommet s’étire en pointe (Pl. 28, fig. 1’). Lorsque le rostre

est allongé, le changement de convergence apparait d’ordinaire vers le milieu de sa

longueur ; dans le cas contraire, la pointe qui résulte de ce changement devient beaucoup

plus courte (figs. 2’, 3’, 4’, 6’); quand le rostre est bref ou trés bref, cette pointe se réduit &

un simple mucron (figs. 7’, 8’). Il est trés rare d’observer une convergence réguliére des

cotés des carénes latérales, auquel cas le rostre se présente sous la forme d’un triangle &

bords parfaitement rectilignes (fig. 5’).

J’ai dit plus haut que le rostre pouvait atteindre et méme dépasser le bout distal des

pédoncules antennulaires, j’ajoute quil peut se réduire 4 une simple avance frontale trés

peu saillante et qu’entre ces deux extrémes on peut trouver tous les intermédiaires

(figs. 1’ & 10’ de la Pl. 28). Quand le rostre est trés court, plus court que les pédoncules

oculaires, les bords des carénes latérales forment une ligne convexe en dehors, de sorte

que les cotés du triangle rostral sont arrondis (figs. 6’ 4 10’). Méme dans ces cas persiste

alors le plus souvent le mucron terminal; toutefois, dans les individus rarissimes ot la

réduction du rostre atteint son maximum, on voit disparaitre le mucron en méme temps

que les carénes dorsale et ventrale (figs. 9’, 10’). Le rostre consiste alors en une légére

avance frontale dont les bords et le sommet sont arrondis ; on se croirait en présence de

la Caridina singhalensis, mais je montrerai dans la suite que cette derniére espéce est

fonciérement différente de la nétre.

Au surplus, si l'on se bornait & lexamen du rostre, la plupart des espéces de

Caridines pourraient étre rapportées 4 la C. brevirostris et cela montre la vanité de toute

classification établie sur la structure rostrale. Pourtant l’espéce que j’ai appelée C. sumilis

doit étre considérée comme une simple forme de la C. brevirostris ; elle en posséde tous

les autres caractéres et d’ailleurs provient aussi des Seychelles. La forme similis peut

étre distinguée par son rostre long ou assez long, le développement de ses deux carénes

impaires et la présence de denticules sur sa caréne ventrale (Pl. 28, fig. 11). J’ai groupé

dans une autre forme, appelée Gardiner, les individus qui présentent des caractéres

identiques, mais avec une caréne dorsale spinuleuse, quelle que soit d’ailleurs la caréne

ventrale (Pl. 27, fig. 2; Pl. 28, figs. 1 & 5 et fig. 12). Quant aux individus ot le rostre est

plus court que les pédoncules oculaires, ils représentent la forme typica de lespéce ; le

plus souvent leurs carénes impaires sont inermes ou disparaissent, mais il va sans dire

qu’on peut trouver entre eux et les formes précédentes les transitions les plus ménagées

(Pl. 28, figs. 6—10 et fig. 15).

BOUVIER—LES CARIDINES DES SEYCHELLES 451

Variations DES cHELIPEDES (PI. 29). Avant d’aborder |’étude des chélipédes de notre

espéce, il ne sera pas inutile de noter que les genres Caridina et Ortmannia sont trés

voisins l'un de l'autre, que le second dérive sirement du premier et qu'il en differe

seulement par une plus grande similitude des chélipédes: alors que ces deux paires

d’'appendices sont fort dissemblables dans les Caridines, ceux de la premiére étant bien

plus courts et plus massifs que ceux de la seconde, avec le carpe échanecré en avant, ils

sont au contraire 4 peu prés du méme type dans les Ortmannies, ceux de la seconde étant

seulement un peu plus gréles et plus longs avec une échancrure carpienne plus faible.

Ceci étant rappelé, nous allons voir que la C. brevirostris présente tous les passages entre

le type caridinien le plus net et une forme préortmannienne qui annonce le type

Ortmannie sans que ce type lui-méme soit toutefois réalisé.

1°. Forme nettement caridinienne. Chez les individus qui présentent la premiére

forme (Pl. 29, figs. 1 et 1’) les chélipédes ressemblent tout 4 fait 4 ceux des Caridines les

plus typiques, voire & celles qui appartiennent aux espéces primitives du genre. Dans les

chélipédes antérieurs (fig. 1), les pinces restent assez faibles, parce que peu dilatées dans

leur portion palmaire qui est plus courte que les doigts, le carpe est bien plus long que

large avec une échancrure antérieure médiocre, ce qui correspond & la médiocre saillie

postérieure de la portion palmaire. Les chélipédes suivants (fig. 1’) se distinguent par

leur longueur et leur gracilité beaucoup plus grandes: la pince est faible et rétrécie a

la base de sa portion palmaire qui est beaucoup plus courte que les doigts, le carpe est

étroit, un peu dilaté en avant, aussi long ou plus long que les pinces. D’ailleurs, dans les

chélipédes des deux paires, les doigts se terminent par un gréle stylet qui égale 4 peu pres

les soies denticulées contigués (Pl. 29, figs. la et 10).

2°, Forme préortmannienne (Pl. 29, figs. 6 et 6’). Dans cette forme, les pinces

antérieures (fig. 6) sont fortes, massives, ovoides, ce qui tient au grand développement

de la portion palmaire qui est plus longue que les doigts, fort large et d’ordinaire plus

ou moins rétrécie d’arriére en avant; le carpe qui porte ces pinces est lui-méme trés-

massif, plus large que long, beaucoup plus court que les pinces, avec une profonde

échancrure, ce qui correspond & la forte saillie postérieure de la portion palmaire. Dans

les exemplaires ott se manifeste la plus grande ressemblance avec les Ortmannies, les

pinces de la seconde paire (fig. 6’) sont ovoides comme les précédentes, mais notablement

moins fortes, le carpe est assez large et un peu plus court que les pinces; dans d'autres

exemplaires moins modifiés (fig. 5’), la pince peut se rétrécir un peu en arriére, le carpe

rester gréle et dépasser la pince en longueur. Mais dans tous les cas, les doigts des deux

paires de pinces sont au plus aussi longs que la portion palmaire et se terminent tous par

un ongle large et fort (5’a, 6a) dont l’extrémité distale est arrondie (Pl. 29, figs. 5 et 5,

6 et 6’). Les exemplaires de cette forme se rapprochent beaucoup de lOrtmanma

Edwardsi Bouv. dont ils ne se distinguent que par deux caractéres: l'absence de toute

échancrure sur le bord antérieur du carpe des pattes de la seconde paire et le

développement d’un seul ongle au lieu de cing 4 l’extrémité des doigts.

Entre ces deux formes extrémes s’intercalent des intermédiaires nombreux, surtout

au point de vue de la forme des pinces, de la longueur des doigts, des dimensions du carpe

452 PERCY SLADEN TRUST EXPEDITION

(PI. 29, figs. 2, 3, 4); quant aux variations de l’armature terminale des doigts, elles sont

forcément plus restreintes et se limitent soit & une certaine variation de longueur dans les

ongles, soit & la substitution de l’ongle au stylet dans les pattes de la premiére paire.

Jamais on ne trouve d’ongles aux pattes postérieures quand il existe des stylets au bout

des doigts de la paire précédente.

En somme, on peut dire de la structure des chélipédes ce que nous avons dit

en traitant de la structure du rostre; les variations qu'elle présente apparaissent si

nombreuses et si étendues qu’on ne saurait en tirer parti pour caractériser l’espéce et qu'il

faut, par cela méme, les éliminer dans la systématique du genre Caridine.

AUTRES CARACTERES LARGEMENT VARIABLES. D’autres caractéres varient dans une large

étendue, encore quils présentent une stabilité assez grande chez la plupart des

individus.

Je signalerai en premier lieu, comme appartenant 4 ce groupe, l’angle infra-

orbitaire qui occupe le bord antérieur de la carapace. Cet angle présente du cété des

yeux une dilatation aliforme et, presque toujours, se termine en une pointe aigué (PI. 28,

figs. 1, 2, etc.) qui présente des variations considérables ; tant6t assez longue et vraiment

spiniforme (figs. 1, 2), tantét réduite, mais plus rarement, 4 un simple mucron (PI. 28,

fig. 5) qui peut méme disparaitre (fig. 7). C’est & peu prés exclusivement dans certains

individus de la forme typica la plus nette que l’épine se réduit & un mucron; chez

d'autres individus de la méme forme, surtout chez ceux ot le rostre est fort court, le

mucron disparait lui-méme et alors la saillie infra-orbitaire n’est plus autre chose

qu'un angle arrondi (fig. 7), comme dans la C. singhalensis Ortmann et dans la C.

atyowdes Nobili.

De méme nature, quoique moins étendues, sont les variations de l’épine qui fait

saillie en dehors & l’extrémité distale du premier article des pédoncules antennulaires.

D’ordinaire, cette épine est gréle, trés aigué et égale au tiers de la longueur du second

article (Pl. 27, fig. 2; Pl. 28, figs. 1, 2, etc.) sur les flancs et & la base duquel on

la trouve. Or, elle peut se réduire beaucoup en longueur en méme temps qu'elle

s’élargit, et prendre la forme d’un triangle 4 sommet peu aigu (PI. 28, fig. 7). C'est

également chez les individus typica dont le rostre est particuliérement bref qu’on observe

cette réduction ; toutefois l’épine ne disparait jamais complétement et méme, en aucun cas,

ne devient rudimentaire comme on l’observe dans la C. singhalensis.

Il convient de signaler également les variations assez considérables de l’angle sous-

antennaire formé par le bord du deuxiéme article des pédoncules des antennes 4 son

extrémité inféro-externe (Pl. 27, fig. 4). Quand il est bien développé, ce qui est le cas

de beaucoup le plus fréquent, cet angle apparait comme une épine quand on examine

la crevette latéralement (Pl. 27, fig. 2), mais quand on regarde celle-ci par dessous (Pl. 27,

fig. 4), il se présente sous sa forme réelle, c’est-a-dire comme un angle aigu assez largement

ouvert, un peu infléchi en dedans, terminé en pointe mais sans prolongement spiniforme.

C’est encore chez les formes & long rostre qu’il est d’ordinaire le plus développé, mais

d’ordinaire aussi, on le voit se réduire chez les formes brévirostres et bien souvent alors il

ne se présente plus qu’a l'état d’une faible saillie obtuse (Pl. 28, fig. 7).

C'ARACTERES CONSTANTS OU PEU VARIABLES. Les caractéres constants ou peu variables

BOUVIER—LES CARIDINES DES SEYCHELLES 4538

sont nombreux, mais il faut y établir deux groupes: un premier pour les caractéres

communs aux diverses Caridines, un second pour ceux qui paraissent de nature spécifique.

Les caractéres du premier groupe ne méritent pas de nous arréter, ils se rapportent aux

fouets antennulaires et antennaires, aux appendices buccaux et aux branchies, 4 l’angle

formé latéralement, sur son bord postérieur, par le sixitme segment abdominal, au telson

et 4 l’endopodite des uropodes. Une analyse et des recherches plus minutieuses

reléveront sans doute quelques traits spécifiques parmi ces caractéres, mais la tache que

javais entreprise était suffisamment ardue et il m’a semblé prudent et convenable den

laisser une part 2 d'autres.

La seconde série de caractéres est plus importante parce qu'elle fournit le moyen

d’ébaucher une nouvelle classification des Caridines. Je vais passer successivement en

revue chacun des caractéres de cette série.

1°. La carapace (P1. 27, fig. 1). Elle présente une voussure dorsale trés nette dans

notre espéce ot dailleurs elle est relativement courte, sa hauteur maximum égalant environ

les # de sa longueur post-orbitaire, cette dernitre étant mesurée depuis le fond de l’orbite

jusqu’au bord postérieur correspondant. L’angle antéro-inférieur est arrondi et obtus,

cest-a-dire un peu plus grand qu’un angle droit. Les variations de ces caractéres sont

trés réduites.

2°, Pédoncules oculaires (Pl. 27, fig. 2, et Pl. 28). Ils sont subcylindriques, la

région cornéenne n’étant pas dilatée ou |’étant fort peu; celle-ci recouvre 4 peu prés

la moitié de la longueur des pédoncules qui sont relativement courts; il y a une petite

échancrure dorsale sur le bord postérieur de la cornée.

3°. Région antennulaire. L'arceau (Pl. 27, fig. 3) qui porte les antennules est

triangulaire et aplati; son sommet est aigu ou subaigu et son axe ne s‘éléve jamais en

une forte caréne verticale & bords tranchants comme dans les Caridines du groupe de la

C. typus. Lracicule antennulaire dépasse un peu les yeux (Pl. 28), mais n’atteint pas

Yextrémité distale du premier article des pédoncules antennulaires. Le rapport de la

longueur préorbitaire de ces derniers 4 la longueur post-orbitaire de la carapace varie

entre 0°71 et 0°55; il atteint d’ordinaire son maximum chez les individus ot le rostre est

allongé, son minimum chez les typica ow le rostre est le plus réduit.

4°, Antennes. Elles présentent des variations assez grandes. D’ordinaire, le dernier

article de leurs pédoncules est court (Pl. 27, fig. 2; Pl. 28, fig. 1), dépasse peu le bout distal

du premier article des pédoncules antennulaires et n’atteint pas le milieu de Jécaille ;

lépine de cette derniére apparait d’ordinaire peu large 4 la base et trés aigué. C'est

chez les individus 4 rostre long ou médiocre qu’on observe les dispositions précédentes,

mais dans beaucoup de typica, surtout chez ceux ow le rostre est bref, le pédoncule des

antennes peut atteindre le milieu de l’écaille et |’épine de celle-ci devenir large et un

peu obtuse (Pl. 28, fig. 7’).

5°. Epipodite des pattes-machoires postérieures. L’épipodite des maxillipédes pos-

térieurs présente, chez toutes les Caridines, un prolongement basilaire dirigé contre

les branchies. Ce prolongement, dans sa forme et dans sa longueur, varie d’une espéce

& lautre. Chez la C. brevirostris il est un peu plus court que |'épipodite lui-méme

454 PERCY SLADEN TRUST EXPEDITION

et se présente sous la forme d’une lame triangulaire droite qui se termine en pointe

obtuse (Pl. 27, figs. 5 et 6). J’ajoute que beaucoup d’autres espéces offrent une disposition

semblable.

6°. Pattes ambulatoires. Les pattes ambulatoires (PI. 27, figs. 8 et 9) sont assez

gréles, avec le propodite 4 peu prés droit, ce qui distingue notre espéce de certaines

autres, notamment de la C. Davidi Bouv. ot les mémes appendices sont épaissis, avec le

propode nettement arqué.

Je ne crois pas qu’il soit possible d’utiliser pour la systématique les grosses épines du

méropodite et du carpe, non plus que celles, plus menues et plus courtes, du bord inférieur

du propodite (Pl. 27, figs. 8 et 9); les premiéres m’ont paru 4 peu prés constantes chez

les diverses Caridines et les secondes assez variables d’un exemplaire 4 l’autre dans une

méme espéce (figs. 8 et 9). Par contre je pense, 4 l’exemple de M. de Marn, qu’on peut

trouver de bons caractéres spécifiques dans la forme des doigts, dans leur armature et

dans leur longueur relative, encore que ces caractéres soient frappés de variations plutét

étendues.

Les doigts des pattes ambulatoires de la 1° paire (p*) sont triangulaires,

légérement arqués et, comme de coutume, se terminent par un forte griffe courbe (PI. 27,

fig. 7). Leur bord interne est droit ou faiblement convexe, armé de 5 & 7 épines dont

la premicre (l’épine voisine de la griffe) est la plus forte. Comme on le verra par le

tableau de la page suivante, ils sont assez courts, leur longueur variant, a trés peu

pres, du 4 au }? de la longueur du propodite.

Les pattes ambulatoires de la 2° paire (p*) sont tres sensiblement identiques aux

précédentes.

Les pattes ambulatoires de la derniére paire (p*) sont tres différentes, leur doigt

étant rectiligne, rarement triangulaire, mais presque toujours avec les deux bords

subparalléles (je veux dire peu convergents) et le bord inférieur droit ou un peu convexe,

toujours fortement convexe avant la griffe (Pl. 27, fig. 10). Comme dans les autres

Caridines, ce dernier bord est muni d’une peigne de spinules contigués, incisées sur leurs

bords. Dans notre Caridine ces incisions microscopiques sont peu accentuées et le nombre

des spinules varie ordinairement de 30 & 35, encore qu'il s'éléve parfois 4 37 ou descende

a 26. Il est peu de Caridines ot le nombre des spinules soit aussi faible. Le doigt des

pattes ambulatoires postérieures est plus long que celui des pattes précédentes, mais le

propode est également plus allongé, de sorte que le rapport des deux articles reste 4 peu

pres le méme: il varie entre 4 et 5.

7°. Epimeéres abdommaux. Les épiméres du 1° segment abdominal sont différents

dans les deux sexes, leur bord antéro-inférieur étant un peu convexe chez les males

(Pl. 27, fig. 11) et chez les jeunes, droit et méme le plus souvent un peu concave chez

les femelles (fig. 12). Des différences analogues s’observent dans plusieurs autres

espéces, mais non chez toutes, de sorte quelles peuvent servir a caractériser la C.

brevirostris.

Dans le 4° segment abdominal l’angle postérieur des épiméres est arrondi ou largement

obtus (Pl. 27, fig. 13), tandis que le méme angle est subaigu dans les épiméres de |’anneau

BOUVIER—LES CARIDINES DES SEYCHELLES 455

suivant dont les deux bords sont d’ailleurs nettement convexes (PI. 27, fig. 14). Ces deux

caractéres sont sujets 4 quelques variations, mais ils ne semblent pas sans valeur encore

quils se présentent chez de nombreuses autres Caridines.

8°. Uvropodes, Les caractéres des uropodes ont une importance beaucoup plus

grande. Dans le C. brevirostris, Particle basilaire de ces appendices se prolonge sur

Yexopodite, ot il forme un angle uropodial aigu ou mucroné dont le bord supéro-interne,

ordinairement droit ou concave, est aussi long ou plus long que la distance de sa base

au bord opposé (PI. 27, figs. 17 et 18). D’autre part, la ligne articulaire spinuleuse de

lexopodite (Pl. 27, figs. 17, 19, 20) a une direction légérement sigmoide, elle atteint & peu

prés l’axe médian de l’appendice (fig. 19), et présente un assez grand nombre de spinules

mobiles, de 15 & 20 presque toujours, trés rarement 14 (fig. 20).

9°. (ufs. Les ceufs sont largement ovoides, toujours de grande taille et par

conséquent assez peu nombreux ; leur grand diamétre descend rarement au-dessous de

1 mm. et peut atteindre 1 mm. 3, leur petit diamétre varie autour de 0°80.

On trouvera dans le tableau ci-joint les nombres relatifs 4 quelques caractéres

médiocrement variables, dans un certain nombre d’individus trés divers de la C.

brevirostris.

Longueur des péd. antennu-

laires et de la carapace Pattes ambulatoires antérieures Pattes ambulatoires postérieures

Epines

uro-

@ a rostre trés

Rapport | Epines Rapport |Spinules| Podiales

Ped. ant.|Carapace | Rapport ER hee eeneece des du Beng ay pong a des du

8 prop longueurs| doigt OB Pere longueurs| doigt

Typica

Jeune 9 normale |2 mm.|3°6mm.| 0°55 |0:33 mm. 1:7 mm.) 5:1 5 0-43mm.|}2 mm.| 4:08 28 17

@ a& rostre court

et armé......... Sale ts) TAO OvOsmeOrDl 3. | 2: 4°9 Ce | LOE ET eV Lee 4:9 37 21

Spamosirercourt,|2°9 ,, |5 ,, | 0:58 |052 ,, |21 ,, 4 ae OH stsie ey etsh oe 4:8 26 17

dg a rostre trés

COULL aecee ates sD 4 Ses OLGON OOS) 44-| Le8" 5, 48 6 Oman erate) c35 4-7 30 14

Similis

Qarostre long... |3 _,, SS ales 4-4 35 | 20

Q a rostre long

et inerme...... 2-9 Oo 5 4:1 32 15—16

Gardineri

[aya seonenebeded Se Deen COOL 0:42, 2-1 ,, 0-60 , |26 ,, | 4:3 Si) | 16

Pimerostreliong: io) 5, 45205. i O:71 0:44 ,, | 1-7 ,, east: 4 36

Qa rostre moyen |2:7 ,, |4°8 ,, | 0°56 |0:36 ,, |2 ,, : 24... 5-2 SEY || uy

@arostre moyen /2:°9 ,, |46 ,, | 063 |0:38 ,, /2 ,, BO" 4:3 35 19

9 a rostre assez

court...........- 46 ,, | 054 [0-47 ,, [21 ,, 25 ,, | 49 26 | 15—16

@ A rostre court Dee OOo O42 |, ° | 2°) ,, ae, 4-7 37 17—18

SECOND SERIES—ZOOLOGY, VOL. XV. 58

456 PERCY SLADEN TRUST EXPEDITION

SUR L'ORIGINE ET L'IMPORTANCE ZOOLOGIQUE DES VARIATIONS DE LA CARIDINA

BREVIROSTRIS.

Ainsi, la Caridina brevirostris est le si¢ge de variations nombreuses, les unes légeres,

les autres assez grandes, certaines d’une amplitude extraordinairement étendue. I] nous

faut maintenant chercher l’origine de ces variations et montrer |'importance qu’elles pré-

sentent au point de vue zoologique.

LE MECANISME ET L’ORIGINE DE CES vaRraTIONS. Avant de remonter & lorigine de ces

variations, il convient d’étudier le mécanisme qui les a produites, et, sur ce point, je crois

suffisant de relever les considérations suivantes empruntées 4 une note préliminaire de date

récente (1912", 919).

“ Etant données les innombrables variations de l'animal et les passages qui relient ces

variations entre elles, on pourrait croire que notre Caridine, au lieu d’étre une forme auto-

nome, résulte du croisement de deux espéces, l'une primitive 4 long rostre du type

Gardineri avec les pinces de la premitre paire fort différentes des suivantes, l’autre & rostre

court de la forme typica, avec des chélipédes peu dissemblables et plus ou moins ortman-

niens. Cette hypotheése a l'avantage d’expliquer fort simplement la plupart des variations

observées et respecte l’ancienne classification en accordant au rostre et aux chélipédes

une importance systématique de premier ordre; les deux espéces présumées, dans cette

hypothése, seraient situées aux deux pdles du genre, l'une trés primitive, ]’autre a évolu-

tion trés avancée. Mais alors, comment expliquer que deux espéces aussi lointaines se

croisent avec une telle facilité? Comment admettre surtout qu’elles se ressemblent par

ailleurs de tous points, qu’elles aient le méme facies, le méme air spécifique et, en somme,

cette multitude de caractéres communs qui nous ont permis de les distinguer des autres

espéces du méme genre ?

“Tl nous faut done abandonner l’hypothése de deux espéces en croisement et considérer

notre Caridine comme une forme autonome.

“ Mais cela ne résout pas le probléme des extraordinaires variations de l’espéce,...sont-

elles le résultat de transformations lentes et progressives ou proviennent-elles brusquement

de mutations ?

“Si l'on admet une variation lente et progressive, il faut admettre pour point de

départ une forme trés longirostre 4 pinces nettement caridiniennes et pour terme ultime

des individus 4 rostre presque nul et 4 pinces plus ou moins ortmanniennes; ces deux

formes extrémes sont identiques 4 celles que nous avons admises dans l’hypothése de

deux espéces en hybridation, mais la seconde dérive de la premiére par des passages pro-

gressifs au lieu d’étre un point de départ comme elle, tous les individus étant d’ailleurs

capables de se croiser entre eux.

“La supposition n’a rien d’invraisemblable, encore que les deux formes extrémes soient

trés rares et que la seconde ne présente jamais des représentants de grande taille. Ce qui

la rend sujette & caution, c'est qu'elle réclame une continuité absolue dans des influences

modifiantes qui devaient étre fort dissemblables, puisque les unes agissaient sur le rostre

(et les pédoncules antennulaires, les épines orbitaires de la carapace, etc.), les autres in-

BOUVIER—LES CARIDINES DES SEYCHELLES 457

dépendamment sur les chélipédes. Diailleurs, j’ai constaté des variations plus grandes

encore dans une espéce de Maurice, la Caridina Richtersi Thallw., ot l'on arrive 4 des

individus franchement ortmanniens qui, séparés des autres par un large hiatus, n’en

peuvent provenir par évolution lente.... Pour ces motifs, il me parait peu rationnel

d’attribuer & une évolution lente et progressive la plupart des variations de la C. bre-

virostris.

“Nous voici done, semble-t-il, devant un type en mutation active qui dépense &

Vheure actuelle une force d’évolution longuement accumulée et qui donnera sans doute

naissance, dans la suite, 4 bon nombre de formes nouvelles, les unes du genre Caridina, les

autres du genre Ortmannia. Par ses variations nombreuses et trés diverses, notre

espece n’est pas sans analogie avee la Draba verna, petite Crucifére multiforme sur

laquelle ont appelé l’attention les célébres expériences culturales d’Alexis Jordan. Mais

la ressemblance ne va pas plus loin: comme le fait remarquer M. de Vries, les varia-

tions de la Draba verna se fixent trés vite en ‘petites espéces, d’abord parce que ‘les

anthéres s’ouvrent dans les boutons floraux et pollinisent les stigmates avant l’ouverture

des fleurs,’ ensuite parce que ces derniéres sont ‘trés peu visibles,’ et ne regoivent guére

la visite des Insectes; tandis que les représentants de la Caridina brevirostris, quelles

que soient leurs variations, peuvent & coup str se croiser entre eux, ce qui entrave, dans

une large mesure, l'isolement des formes nouvelles. Pour que des formes semblables,

dans nos Crevettes, arrivent 4 s’isoler, il faut qu’elles soient le résultat d’une mutation

fort ample, capable de s’opposer au croisement; il en est sans doute ainsi chez les

espéces d’Ortmannia qui, trés variables, donnent brusquement des Atya parfaitement

stables ; la Caridina brevirostris s'essaye, 4 n’en pas douter dans des directions multiples,

mais elle n’a pas encore atteint le type générique supérieur, celui du Ortmannia, ot elle

pourrait se fixer.”

Lisolement d’animaux agiles commes les Crevettes est, 4 coup str, difficilement

réalisable dans les conditions naturelles, mais quand par hasard il se produit, on voit se

fixer en races certaines des formes issues de la mutation. C'est la, semble-t-il, ce que l'on

peut constater en divers points des Seychelles pour notre Caridine. Les captures

effectuées dans ces iles par M. Stanley Gardiner sont réparties en 12 bocaux qui corre-

spondent sans doute & un méme nombre de péches distinctes ; or, tandis que la plupart de

ces flacons renferment des individus fort variés, trois d’entre eux ne comprennent que des

typica normaux peu différents les uns des autres: deux proviennent de la Cascade

de Mahé, l'un avec 50 individus, l'autre avec 150, le troisitme fut rempli au Morne

Seychellois, le 22 novembre 1905, et comprend une centaine de typica.

Tandis que les individus de la forme typica peuvent se trouver sans mélange et

constituer en certains lieux une race 4 peu pres pure, les représentants des autres

formes sont toujours extraordinairement variés et presque toujours en compagnie de

typica auxquels ils se relient par de nombreux passages. Et puisque les individus plus

ou moins longirostres se rapprochent bien plus que les brévirostres du type caridinien

primitif, on a des raisons de croire que la C. brevirostris tend 4 s'éloigner de ce type par

des mutations nombreuses, par une explosion de caractéres, et que la forme typica issue

de ces mutations représente un état d’équilibre nouveau qui, sous l’influence de I’isole-

58—2

458 PERCY SLADEN TRUST EXPEDITION

ment, se traduira dans la suite par la naissance d’une race, peut-étre méme d'une espéce

nouvelle.

Il est trop évident que la sélection naturelle ne saurait expliquer les variations

nowbreuses de la Caridina brevirostris; et quant 4 la théorie Weismannienne de la

sélection germinale, elle ne fait que reculer la difficulté puisqu’elle suppose des variations

dans les déterminants, c’est-d-dire dans le plasma germinatif des individus. II faut done

nous résoudre & voir dans les mutations de cette sorte—comme dans toutes les mutations—

le résultat d’une influence de milieu qui s’est fait longuement sentir et qui s'est pour ainsi

dire accumulée dans le protoplasme des représentants de l’espéce avant de se manifester

au dehors par une explosion de caractéres. Sans doute, l’influence du milieu n’est pas

aussi nettement visible dans les mutations que dans les variations lentes, mais il est des

exemples magnifiques oti elle se manifeste également sur des jeunes qui n’ont pu en

ressentir les effets: c'est parce que leurs ancétres furent de francs herbivores que les

jeunes Ruminants quittent l’utérus maternel avec les tubercules molaires arasés; et de

méme, c'est parce que les Paguriens habitent depuis une longue série de siécles des

coquilles dextres que leurs glaucothés symétriques deviennent asymétriquement dextres

avant de chercher un logis. Dans les deux cas, l’influence du milieu sur le nouveau-né

est réduite ou nulle, ce qui compte, c’est l’influence sur les ancétres, influence qui se

révele par l’éclosion brusque de certains caractéres. I] doit en étre de méme dans

notre Caridine; ses représentants ont longuement subi l’influence du milieu ot ils

vivaient et la manifestent aujourd’hui par une éclosion brusque de caractéres.

CONSKQUENCES PRINCIPALES DES OBSERVATIONS QUI PRECEDENT. De tous ces caractéres

éclos par mutation, ceux relatifs aux chélipédes me paraissent les plus intéressants parce

quils mettent en évidence le processus suivant lequel les Caridina évoluent dans le

sens du type générique immédiatement supérieur, le type Ortmannia. En méme temps

qu’elle subit des modifications nombreuses dans sa carapace, ses appendices céphaliques,

ses segments et ses appendices abdominaux, notre Caridine se rapproche peu & peu

des Ortmannies par la structure de ses chélipédes dont les deux paires finissent par

étre peu dissemblables et acquitrent alors un facies pseudo-ortmannien. On pourrait

croire que ces variations des chélipédes sont le résultat d'un croisement entre Cari-

dines et Ortmannies, mais il faut renoncer 4 cette hypothése, car les Ortmannia ne

présentent aucun représentant aux Seychelles, et parmi les 3,000 individus de Caridina

brevirostris capturés dans ces iles, je n’en ai pas trouvé un seul du type franchement

ortmannien. On doit par conséquent admettre que notre espéce évolue d’elle-méme

dans le sens Ortmannia, sans aucun rapport sexuel avec les représentants de ce dernier

genre. Cette évolution est indépendante de toutes les autres variations subies par

l’espéce ; elle peut se manifester chez toutes les formes de notre Caridine, qu’elles soient

longirostres ou brévirostres ; elle se manifeste méme chez les typica en isolement comme

j'ai pu le constater dans un groupe capturé 4 Praslin et qui renfermait 70 individus

de cette forme. On peut dire en somme que ce qui domine dans les variations de la

Caridina brevirostris, c'est la tendance des chélipédes & se rapprocher du type ort-

mannien.

Le type Ortmannia ne semble pas encore réalisé chez la Caridina brevirostris

BOUVIER—LES CARIDINES DES SEYCHELLES 459

mais les observations que j'ai pu faire (1912’) sur le Caridina Richtersi Thallw.

montrent que cette réalisation se manifestera quelque jour. La C. Richtersi est une

espece particulitre 4 Il'ile Maurice; j’ai eu la bonne fortune de pouvoir en réunir

250 exemplaires qui proviennent presque tous des environs de St Louis ot ils furent

capturés 4 mon intention par un trés aimable correspondant, M. le Dr Barbeau. L’espéce

est en pleine mutation comme la C. brevirostris; elle varie 4 peu prés de la méme

maniére, toutefois avec cette différence intéressante que certains de ses représentants,

5 sur 250, sont des Ortmannia tout & fait typiques; beaucoup d'autres exemplaires

appartiennent au type caridinien le plus net, mais la plupart se rapprochent 4 divers

degrés du type des Ortmannies par leurs chélipédes et plusieurs d’entre eux réalisent

une forme préortmannienne identique & celle de la C. brevirostris : jai donné a la mutation

ortmannienne de la C. Richtersi le nom d’Ortmannia Hdwardsi (1905, 103). Les cing

exemplaires de cette forme sont bien réellement du type spécifique de la C. Richtersi,

mais ils se distinguent par leurs caractéres de genre qui sont du type Ortmanma le plus

net. Ici, la mutation est de pleine évidence, et de grande envergure: avec le carpe de

leurs chélipédes postérieurs sans échancrure distale et longle simple qui termine leurs

pinces, les individus préortmanniens de la C. Richtersi sont encore de vraies Caridines,

tandis que l’Ortmannia Edwardsi présente une échancrure carpienne sur ses chélipédes

des deux paires et se rapproche de l’'Ortmannia Henshawi par les ongles multiples de

ses pinces (5 ongles dont un impair et les quatre autres en deux paires). Et il n'y

a pas de transitions entre les deux formes !

Cette similitude dans les variations de la C. Richtersi et de la C. brevirostris en-

traine des conséquences importantes. De ce fait que les chélipédes varient de la méme

maniére dans les deux espéces, on peut conclure que la Caridina brevirostris évolue dans

le sens ortmannien comme la C. Richtersi et qwelle attendra sirement, comme cette

derniére, le stade générique supérieur, celui des Ortmannia. Et du fait que les individus

plus ou moins ortmanniens de la C. brevirostris ne sont pas des hétérozygotes provenant

d'une hybridation entre Ortmannia et Caridina, on doit conclure que les mémes formes

de la C. Richtersi sont également indépendantes de toute hybridation’; ce qui revient 2

dire que /’évolution ortmannienne, dans les deux crevettes, s'effectue au sein méme de

Lespéce, sans le concours daucune forme du type ortmannen.

Cette conclusion n’est-elle pas également applicable aux espéces d’Ortmannia qui

donnent actuellement des Atya? Ces espéces ressemblent aux précédentes par leur

variabilité extraordinaire qui frappe surtout les chélipédes et par le profond hiatus qui

éloigne les individus ortmanniens des individus atyiens ; chez elles, toutefois, la mutation

bat son plein, elle donne en grand nombre des individus des deux formes, d’ot l'on a pu croire

que la production d’individus atyiens et ortmanniens par une femelle ortmannienne résulte

du croisement de cette femelle avec un mile atyien. L’hypothése est de M. Cuénot

(1911, 399); bien que trés plausible, on doit la tenir pour superflue, la C. Richters: nous

1 Au surplus, comme je l’ai fait observer ailleurs (1912, 922), on ne saurait attribuer au croisement de la

Caridina Richtersi avec YOrtmannia Edwardsi les individus incomplétement ortmanniens de la Caridine ; ces

individus, en effet, sont extrémement nombreux, alors que ceux de la forme Ortmannia Hdwardsi ne comptent

que pour J, dans le chiffre de l’espéce.

460 PERCY SLADEN TRUST EXPEDITION

montrant que les variations initiales d’une espéce et l’accession de cette derniére au type

générique immédiatement supérieur peuvent s’effectuer en dehors de toute hybridation.

Je fais allusion aux deux espéces d’Ortmannia ot j'ai mis en évidence les mutations évolu-

tives (1904, 1905, 1909°): V Ort. Alluaudi Bouv. qui donne des Atya serrata Sp. Bate et

POrt. Henshawi Rathb. qui donne des Atya bisulcata Rand. On sait que M. Bordage

(1908, 19097, 1909"), en élevant des femelles ovigéres d’Ortmannia Alluaudi, a obtenu

des individus de cette forme et des Atya serrata, tandis que des femelles d’Atya serrata

niont donné que des exemplaires de leur type. Il y a mutation évolutive de

POrtmannia Alluaudi, mais le type atyien réalisé ne semble pas faire retour en arriére.

APPLICATIONS 4 LA SYSTEMATIQUE DU GENRE Caripinre. Un autre résultat de l'étude

qui précéde, c'est la disqualification du systéme actuellement en usage pour la classifi-

cation des Caridines. J’ai récemment exposé comme il suit les bases et l’histoire de ce

systéme (1912*):

“Les Crevettes d’eau douce du genre Curidina sont assez nombreuses ; on en connait

aujourd’hui pres de 50 espéces et la liste n’est strement pas close. Ces espéces semblent

trés voisines les unes des autres, encore que leurs formes extrémes présentent un contraste

frappant ; il n’est pas facile de les caractériser et l’on doit quelque reconnaissance & M. J. G.

de Man qui a tenté un sérieux effort dans ce but. La classification de M. de Man, établie

en 1892 (1892), divise les Caridines en deux groupes d’aprés l’armature du bord supérieur

du rostre qui est tant6t inerme, tant6t pourvu de denticules. Cette classification a été

légérement modifiée par M. Ortmann en 1894 (1894) et par moi-méme en 1905 (1905), sans

cesser de recevoir pour base la structure du rostre; ainsi, les trois groupes dans lesquels

j'ai réparti, en 1905, les diverses espéces du genre ont pour caractéres respectifs : un rostre

denticulé au moins en dessus et plus long que les pédoncules antennulaires (groupe de la

C. nilotica), un rostre analogue mais plus court que ces pédoncules (groupe de la C. laevis),

enfin un rostre inerme du cété dorsal et ordinairement peu allongé (groupe de la C. typa).

Ces groupes correspondent assez bien 4 ’évolution du genre, les espéces du premier ayant

des caractéres primitifs qu'on ne rencontre pas dans les autres ; au surplus, pour distinguer

les espéces de chaque groupe, j’ai eu recours, comme MM. de Man et Ortmann, a des

caractéres en apparence moins importants tels que l’armature épineuse de la carapace, des

antennules et des antennes, la forme et les dimensions des chélipédes ou pattes 4 pinces,

la longueur relative des divers articles des pattes des trois paires postérieures ou pattes

ambulatoires.”

Etant données les variations extraordinaires de la Caridina brevirostris, et celles plus

étendues encore de la C. Richtersi, il est trop évident que la classification précédente ne

résiste pas Ad la critique. Fondée sur la structure rostrale, elle a une base fragile, presque

protéiforme, qui permettrait de rapporter notre Caridina brevirostris & plus de vingt

espéces ; et quant aux autres caractéres qu'elle emploie, la plupart sont également ver-

satiles, surtout ceux relatifs aux chélipédes qui rivalisent, 4 ce point de vue, avec les

caracteres du rostre.

M. Borradaile avait amplement raison et j’ai da chercher ailleurs les régles essentielles

de la classification des Caridines.

Lune des plus importantes, 4 mon avis, doit étre tirée des modifications adaptatives

BOUVIER—LES CARIDINES DES SEYCHELLES 461

subies par les divers représentants de la famille des Atyidés en ce qui concerne le genre de

locomotion. Comme les Acanthéphyridés qui ont servi d’ancétres a la famille, les Atyidés

primitifs se distinguent par leur grande légéreté natatoire, légéreté qui provient surtout

d'une grande souplesse dans les uropodes: en effet, chez les Xiphocaris, Xiphocaridina,

Troglocaris et Atyaéphyra, les deux rames de chaque uropode sont minces, trés flexibles,

et l’on ne trouve qu'une spinule sur la ligne articulaire qui pénétre en dehors

dans la rame exopodiale ou externe; cette ligne est droite, et d'ailleurs fort courte, son

bout interne n’atteignant jamais, il s’en faut, le milieu de la rame, c’est-d-dire l’axe longi-

tudinal médian de l’exopodite uropodial. Inversement, 4 l’autre pdle de la famille, et

surtout dans les Atya, la natation doit étre lourde, comme la forme de l’animal qui semble

plutét fait pour se déplacer par saccades au milieu des herbes et méme pour fouir sur les

rives; alors, toute flexibilité disparait dans les rames uropodiales dont |’exopodite trés-

coriace présente une ligne articulaire sinueuse et allongée, d’ailleurs appuyée sur un rang

dorsal d’épines de soutien fortes et nombreuses. Entre ces deux extrémes se placent les

Caridina et les Ortmannia dont lexopodite uropodial présente toujours une ligne articu-

laire soutenue par des épines, mais avec des variations considérables dans le nombre de

ces derniéres et dans la longueur de la ligne. Ces variations mesurent, pour ainsi dire,

le degré d’adaptation des espéces dans le sens atyien; elles sont fort étendues quand

on passe d’une espéce & l’autre mais assez réduites dans le sein méme d'une espéce.

A tous ces points de vue, elles me paraissent fournir une base sérieuse et solide a la

classification des Caridines.

Un autre caractére de valeur presque égale est tiré du développement des pédoncules

antennulaires. I] est facile de constater que les Caridines les plus primitives, c’est-a-dire

les plus sveltes et sans doute les plus légéres, se distinguent par la longueur de ces pé-

doncules, tandis que les plus évoluées, qui sont en méme temps les plus lourdes, présentent

des pédoncules épais et courts. Les dimensions de la carapace étant d’ordinaire peu

variables, il s’ensuit qu’on pourra fixer assez bien le point d’évolution d'une espéce en

déterminant le rapport qui existe entre la longueur préorbitaire des pédoncules et la

longueur post-orbitaire de la carapace. Ce rapport peut étre plus grand que 1 ou tomber

au-dessous de 0°50; pour une espéce donnée, il est beaucoup moins constant que le nombre

des épines uropodiales, mais ses variations n’excédent pas certaines limites et on peut les

utiliser dans la classification pour établir des groupements. I] va sans dire qu’on n’observe

pas un parallélisme absolu entre les transformations des pédoncules antennulaires et celles

de l’exopodite uropodial ; les deux caractéres sont indépendants encore que relatifs l'un et

lautre 4 l’évolution des Caridines.

Un troisiéme caractére, de nature bien différente, doit étre également introduit dans

la classification des Caridines, il est tiré de l’arceau qui relie 4 leur base les pédoncules

antennulaires. Chez les formes primitives, cet arceau est peu dilaté dans sa partie médiane

ou il s’élargit en triangle et forme deux pans réunis par une aréte obtuse, peu saillante, et

souvent méme peu distincte; dans les Atya au contraire, et dans plusieurs Ortmannia, il

s’élargit bien davantage et son aréte s’éléve en une caréne verticale haute, et 4 bords

tranchants. La premiere disposition semble étre l’apanage des Caridines ; pourtant, quel-

ques-unes de ces derniéres présentent la seconde et constituent, par 14 méme, une petite

462 PERCY SLADEN TRUST EXPEDITION

série naturelle fort bien caractérisée. Cette série prend place parmi les espéces ot les

épines uropodiales sont nombreuses et les pédoncules antennulaires de faible ou médiocre

longueur ; elle ne renferme que des espéces & évolution trés avancée dont la C. singhalensis

Ortm. est, 4 tous égards, une des Caridines les plus éloignées du type primitif.

Je donne ci-apreés une ébauche de classification établie sur ces bases; les caractéres

de l'arceau des antennules y occupent le premier rang parce qu ils sont tranchés et per-

mettent de diviser les Caridines en deux groupes primordiaux fort distinets. Le second

de ces groupes, celui ot l'arceau antennulaire est caréné, me parait des plus naturels ;

quant au premier, qui est beaucoup plus étendu, il se subdivise en deux séries d’aprés la

longueur des pédoncules antennulaires: une série primitive ot le rapport qui exprime

cette Jongueur dépasse 0°80, et une série plus évoluée qui comprend les autres formes.

Dans état actuel de nos connaissances, il parait impossible d’établir des subdivisions en

utilisant le nombre des épines uropodiales, mais ce nombre, comme je l’ai dit plus haut, a

une importance spécifique de premier ordre et j'ai eu soin de |’indiquer en regard du nom

de chaque espéce. J’ai indiqué de méme le nombre des épines qui se trouvent sur le bord

du doigt des pattes postérieures (p*) car, en dépit de ses variations étendues, il offre

une importance spécifique tres réelle, comme l’a montré M. de Man. C'est également a

M. de Man (1908) que l’on doit ’heureuse introduction, dans la systématique caridinienne,

du rapport qui existe, dans les pattes ambulatoires, entre la longueur du propodite et

celle des doigts. Beaucoup d'autres caractéres moins importants doivent étre utilisés

pour la détermination des espéces ; on les trouvera indiqués dans le tableau ci-joint.

Ce tableau n’est qu'une ébauche, non seulement parce qu'il est limité aux seules

espéces dont j’ai vu des exemplaires, mais aussi parce que certaines de ces derniéres

étaient représentées par un tres petit nombre de spécimens, quelquefois par un seul ; or,

il faut de nombreux individus pour bien fixer les caractéres d’une espéce, l’exemple des

C. brevirostris et Richtersi en donne la preuve. Tel qu’on le trouve plus loin, ce tableau

présentera toutefois quelques avantages, dont le plus important, & coup sir, est celui de

préter aux critiques et, par li, de hater la production d’une ceuvre définitive. C'est pour-

quoi je me permets de le relever ici; n’est-il pas, au surplus, le fruit de mes recherches sur

les variations de la Caridina brevirostris? Etant données ces variations, il est trop évident

qu'on ne pouvait mettre en ligne de compte les caractéres considérés jusqu’ici comme

primordiaux, je veux dire ceux du rostre et ceux des chélipédes ; ces caracteres ne sont

pas sans valeur pour certaines espéces, mais ils varient tellement chez la plupart qu'on

doit les exclure d’un tableau systématique.

Dans le tableau, le nombre des spinules des doigts des pattes ambulatoires postérieures

est précédé du symbole p’, et celui des épines uropodiales du symbole wr.

1°. Groupe des Caridines od V’arceau antennulaire est dépourvu de caréne.

A‘ Rapport de la longueur préorbitaire des pédoncules antennulaires 4 la longueur post-

orbitaire de la carapace égal ou supérieur & 0°80.

B' Ce rapport est égal ou supérieur 4 l’unité; p’?; ur. 10—11 witrensis Borr., 1898

(Fidji).

B® Ce rapport est inférieur a l'unité.

BOUVIER—LES CARIDINES DES SEYCHELLES 463

~C* Angle antéro-inférieur de la carapace longuement tronqué et fort peu au

dessous de l’angle infra-orbitaire ; p’ 45—50; ur. 9—10

ensifera Schenkel, 1902 (Célébes).

_C* Angle antéro-inférieur de la carapace obtus et fort éloigné de l’orbite.

D* Doigt de p’ subtriangulaire et égalant presque la moitié du propode; p’ 48—

52; ur. 14—15 sis at propinqua de Man, 1908 (Indes 2).

D* Doigt de p’ 4 bords subparalléles égalant moins du } et plus du } du propode ;

p’ 30—56; ur. 8—15... atte a nilotica Roux, 1833

(Afrique orient. et région indo-pacifique).

D* Doigts de p’ et de p’ subtriangulaires et égalant au plus le + du propode.

E' Angle sous-antennaire prolongé en épine; p* 34—50; ur. ?

brachydactyla de Man; 1908 (Célébes, Flores, etc.).

EK’ Angle sous-antennaire sans épine ; p’ 25—30; ur. 13—14

multidentata Stimpson, 1860 (Célébes).

A’ Rapport de la longueur préorbitaire des pédoncules antennulaires & la longueur post-

orbitaire de la carapace inférieur 4 0°80.

B' Prolongement épipodial des maxillipedes postérieurs long, étroit et arqué ; p’ 42—

60 arom... ha =a Simoni Bouvier, 1904 (Ceylan).

B’ Prolongement épipodial des maxillipédes postérieurs droit ou peu arqué, de longueur

faible ou médiocre.

C’ Le doigt de p* plus court que le 4 du propode.

D* Les spinules du doigt de p* et de p* toutes étroites (doigts des pattes ambula-

toires ayant au moins le } du propode) ; p* 52; ur. 7

gracillima Lanchester, 1901 (rég. de Singora).

D’ La spinule distale des doigts de p* et de p*‘ bien plus grosse que les autres.

E’ L’angle infra-orbitaire et souvent aussi l’angle sous-antennaire sont terminés

en épine; pédoncules oculaires nettement dilatés dans la région cor-

néenne.

F* Lacicule antennulaire atteint ou dépasse le bout distal du 1° article des

pédoncules ; p’ 15; ur. 15—16

serratirostris de Man, 1892 (Seychelles, Flores, etc.).

F* L’acicule antennulaire n’atteint pas le bout distal du 1° article des

pédoncules,

G' Lépine antennulaire atteint presque le milieu du 2° article des

pédoncules; p’ 27; ur. 7—9

fossarum Heller, 1862 (Perse, Syrie).

G’ Lépine antennulaire atteint au plus le bout du tiers basal du 2° article

pédonculaire.

H' Pédoncules oculaires presque aussi larges que longs ; p’ 20; ur. 8—9

brevicarpalis de Man, 1892 (Célébes).

SECOND SERIES—ZOOLOGY, VOL. XV. 59

east

{

jLIBRAR’

464 PERCY SLADEN TRUST EXPEDITION

H* Pédoncules oculaires nettement plus longs que larges.

I’ Angle uropodial franchement aigu.

K’* Le doigt de p’ égale environ le 4 du propode; p’?; ur. 20

pareparensis de Man, 1862 (Célébes).

K’ Le doigt de p*® égale environ le 1 du propode; p> 47—50;

ur. I—11 madagascariensis Bouvier, 1904 (Madagascar).

I’? Angle uropodial obtus ou mucroné.

K* Le doigt de p’ n’égale pas le 4 du propode; angle antéro-

inférieur de la carapace court et subaigu; p’ 31—53;

Un lee ... Richtersi Thalliwitz, 1891 (Maurice).

K’ Le doigt de p’ égale plus du + et moins du 4 du propode; angle

antéro-inférieur de la carapace largement arrondi.

L' 5 épines sur le doigt de p*; 46—50; ur. 8—10

Grandidieri Bouvier, 1904 (Madagascar).

L’ 6a 8 épines sur le doigt de p*; p’ 45—60; ur. 11—15

spathulirostris Richters (Maurice).

EK’ L’angle sous-antennaire et parfois aussi l’angle infra-orbitaire ne se pro-

longent pas en épine; pédoncules oculaires peu ou pas dilatés.

F" Le rapport entre la longueur des pédoncules antennulaires et celle de la

carapace supérieur & 0°50.

G* Les doigts de p* et de p’ égalent au plus le 4 du propode ; p’ 28—37 ;

ur. 14—21 brevirostris Stimpson, 1860 (Loo-Choo, Seychelles).

G’ Le doigt de p* égale environ le 4 du propode ; p’ 28—30; ur. 8—10

isaloensis Coutiére, 1899 (Madagascar).

F°’ Le rapport entre la longueur des pédoncules antennulaires et celle de la

carapace égal au plus 4 0°50; yeux trés réduits; p’ 28—30; ur. 8—10

Mauritw Bouvier, 1912 (Maurice).

C* Le doigt de p’ égale au moins le 4 du propode.

D* L’angle infra-orbitaire et l’angle sous-antennaire sont terminés en é6pine.

K* Propodite des pattes ambulatoires droit et assez gréle, égalant plus de 3 fois

la longueur des doigts dans les pattes 3 et 4.

EF" Doigt de p’ subtriangulaire égalant 4 peu prés } du propode; p’ 75—95;

ieee aes ma i ... laevis Heller, 1862 (Java).

F’ Doigt de p’ égalant environ le 4 du propode.

G’ Epines uropodiales nombreuses, 20 en moyenne pareparensis de Man.

G* Epines uropodiales peu nombreuses, 10 ou 11 ordinairement ; p* 42

togoensis Hilgendorf, 1893 (Afrique occidentale).

E* Propodite des pattes ambulatoires large et nettement arqué, n’égalant pas

3 fois la longueur des doigts ; p’ 54; ur. 12—14

Dandi Bouvier, 1904 (Inkiafou).

BOUVIER—LES CARIDINES DES SEYCHELLES 465

D* Les angles infra-orbitaire et sous-antennaire sont réduits et ne se terminent

pas en épine.

K’ Les doigts de p*, p* n’égalent pas le + du propode.

F* Propodite des pattes ambulatoires large; épine antennulaire normale ;

p 45; ur. 9 ae a temorensis de Man, 1893 (Timor).

F* Propodite des pattes ambulatoires assez gréle; épine antennulaire trés

réduite ... ee 50 os ... tsadloensis Coutiére.

K’ Les doigts des pattes ambulatoires sont assez gréles et plus longs que le

4 du propode; p’ 45—60; ur. 10—11

edulis Bouvier, 1904 (Madagascar).

2°. Groupe des Caridines ot l’arceau antennulaire est armé d’une caréne

forte et tranchante.

(Dans ce groupe, le nombre des épines uropodiales est supérieur 4 15, le rapport de la

longueur des pédoncules antennulaires & celle de la carapace inférieur 4 0°80.)

‘A’ Acicule antennulaire trés aigu.

B’ Le pédoncule antennaire dépasse peu le milieu de l’écaille.

C* Le doigt de p’ est égal au + du propode; caréne antennulaire médiocre ; p’ 50 ;

ur, 22—23 See ae ee japonica de Man, 1892 (Japon).

C’ Le doigt de p* plus petit que le 4 et plus long que le 4 du propode; caréne

antennulaire bien développée.

D’ Angle antéro-inférieur de la carapace largement arrondi.

E' Bord antéro-inférieur du 1° épimére abdominal arrondi, au moins chez la

femelle; p’ 58; ur. 22—25 ... angulata Bouvier, 1905 (Madagascar).

E’ Bord antéro-inférieur du 1 épimére abdominal droit ou concave, au moins

chez la femelle ; p’ 60—65 ; ur. 19—22

Weberi de Man, 1892 (Flores, Célébes, ete.).

D’* Angle antéro-inférieur de la carapace court et subaigu; bord antéro-inférieur

du 1° épimére abdominal droit ou concave, au moins chez la femelle ;

p’ 60; ur. 19—20 ae Er typus Edw., 1837 (Indo-Pacifique).

B’ Le pédoncule antennaire dépasse largement le milieu de l’écaille et atteint presque

ou dépasse le bout distal du 2° article des pédoncules antennulaires; caréne

antennulaire bien développée ; le doigt de p° plus court que le 4 du propode ;

pf; ur, 22 ac Baie ums parvirostris de Man, 1892 (Flores).

A’ Acicule antennulaire en lame obtuse ; le doigt de p* plus long que le 4 du propode ;

p’ 57; ur. 30—40 ... - ... stnghalensis Ortmann, 1894 (Ceylan).

J’ai montré ailleurs (1912”, 295) que la Caridina wpiocheles Bouvier est une simple

forme de la C. Richtersi et qu’au lieu de provenir des Seychelles, comme je l’avais supposé

tout d’abord, elle est propre 4 Tile Maurice ; je crois bien que la C. syriaca Bouvier devra

étre identifiée avec la C. fossarwm Heller et on a vu plus haut que la C. similis Bouvier

59—2

466 PERCY SLADEN TRUST EXPEDITION

appartient & la méme espéce que la C. brevirostris. J’ajoute quil m’a paru convenable

d’élever au rang spécifique la C. nilotica var. brachydactyla de M. de Man et d’identifier

la C. gracilirostris de Man avec la C. nilotica.

Diagnose de la Caridina brevirostris. Nous pouvons maintenant résumer, dans une

diagnose, les caractéres de la C. brevirostris. Voici les termes de cette diagnose.

Carapace un peu votitée dorsalement, assez courte, sa hauteur maximum égalant

environ les # de la longueur post-orbitaire de la carapace ; angle antéro-inférieur largement

arrondi, angle infra-orbitaire prolongé en une pointe qui devient parfois nulle. Pédoncules

oculaires plus longs que larges, peu ou pas dilatés dans la région cornéenne. Arceau

antennulaire sans caréne; acicule plus court que le 1 article des pédoncules; épine

antennulaire trés variable, égalant au plus le } du 2° article des pédoncules ; rapport de

ces derniers 4 la longueur post-orbitaire de la carapace 0°71—0'54. Angle sous-antennaire

infléchi en dedans, souvent aigu, mais non spiniforme, parfois peu saillant et arrondi; le

pédoncule des antennes ne dépasse que trés-rarement le milieu de |’écaille. Prolongement

épipodial des maxillipédes postérieurs en lame triangulaire droite un peu plus courte que

l’épipodite. Pattes ambulatoires assez gréles et 3 propode presque droit; dans les pattes

ambulatoires antérieures le doigt subtriangulaire porte de 5 47 épines dont la premiére

est de beaucoup la plus forte; dans les pattes postérieures, ses bords sont presque toujours

subparalléles et il porte 26 & 37 spinules légérement incisées. La rapport de la longueur

du propodite & celle du doigt varie de 4 4 5:1 dans les pattes ambulatoires antérieures,

et de 4 & 5:2 dans les postérieures. Bord antéro-inférieur des épiméres du 1° segment

abdominal droit ou un peu concave chez la femelle, un peu convexe chez les males et les

jeunes; l’angle postérieur de |’épimére du 4° segment est arrondi ou largement obtus, celui

de l’épimére suivant aigu ou subaigu, 4 bords nettement convexes. Angle uropodial

presque toujours aigu, parfois mucroné, & bord supérieur droit ou concave, et pour le moins

aussi long que la distance de sa base au bord opposé; ligne articulaire de lexopodite

uropodial un peu sigmoide, atteignant & peu prés l’axe médian de l’appendice et armée de

14 & 21 spinules, sans compter la pointe terminale. Les ceufs sont volumineux, leur grand

diamétre atteignant pour le moins 1 mm. et le petit environ 0°8.

Le rostre et les chélipedes sont extraordinairement variables comme je l’ai montré

plus haut.

La position zoologique et les affinités de l’espéce se trouvent indiquées dans le tableau

ci-dessus.

CARIDINES RECUEILLIES EN DIVERS POINTS DES SEYCHELLES SOUS LA DIRECTION

pE M. STantEyY GARDINER.

Les Caridines qui m’ont été obligeamment communiquées par M. Stanley Gardiner

furent toutes recueillies aux Seychelles sous la direction de ce savant. Elles comprennent

trois espéces, dont une extraordinairement prédominante, la C. brevirostris, et deux autres

moins répandues, la C. typus et la C. serratirostris, cette derniére étant de beaucoup la

plus rare.

Le tout se trouvait réparti dans douze flacons, prevenant chacun d'une péche

BOUVIER—LES CARIDINES DES SEYCHELLES 467

particuliére. Voici le relevé trés approximatif du nombre des spécimens contenus dans

les divers flacons.

No. 3. Mahé, Cascade, 800 pieds, 8 décembre, 1905.

C. brevirostris ; 300 individus, la plupart de la forme typica, 15 °/, des deux autres

formes, tous trés variés.

C. typus ; 175 individus de moyenne ou de petite taille, les plus grands ne mesurent

pas plus de 30 mm.

C. serratirostris ; 30 individus.

No. 7. Mahé, Cascade, 1000 pieds.

C. brevirostris ; 150 individus de la forme typica, peu variés ; 4 rostre assez court.

No. 10. Mahé, Cascade R.

“C. brevirostris ; 50 individus de la forme typica, peu variés ; & rostre assez court.

No. 8. Mahé, Chateau-Margot, 1600 pieds.

C. brevirostris ; 400 individus de la forme typica, 4 rostre court ou assez court,

certains avec des chélipédes plus ou moins ortmanniens; 60 Gardineri (ou similis), a

rostre peu allongé et peu ou pas caréné ventralement, 4 chélipédes variés.

No. 12. Mahé, Chateau-Margot, 1600 pieds.

C. brevirostris; 150 individus de la forme typica, & rostre court ou assez court,

certains (9) plus ou moins ortmanniens; 30 Gardineri (ou svmilis) semblables 4 ceux

du numéro 8.

No. 1. Praslin.

C. brevirostris; 50 exemplaires de la forme typica, trés variés et 4 rostre assez

souvent denticulé du cété ventral; 950 Gardinert (ou similis) également trés variés et

‘a rostre presque toujours denticulé en dessus.

_ C. typus ; 23 exemplaires de grande ou de moyenne taille.

No. 2. Praslin.

C. brevirostris ; 50 typica et 700 Gardineri (ou similis) semblables aux précédents.

C. typus ; 134 individus semblables aux précédents.

No. 5. Praslin, Stream de La Blague.

C. brevirostris ; 50 typica tout d fait normaux, pourtant avec certaines variations du

rostre et des chélipédes ; 2 Gardiner, l'un & rostre court, l'autre 4 rostre assez long.

No. 6. Praslin.

C. brevirostris ; 70 exemplaires de la forme typica & rostre plus ou moins modifié et

passages aux chélipédes plus ou moins ortmanniens.

No. 9. Praslin, marais de la Céte d’Or.

C. typus ; 22 exemplaires adultes, mais petits et ne dépassant guére 25 mm.

468 PERCY SLADEN TRUST EXPEDITION

No. 9. Morne Seychellois, 22 nov. 1905.

C. brevirostris ; 100 exemplaires de la forme typica, normaux, avec les chélipédes et

le rostre assez peu variés.

No. 11. Silhouette.

C. brevirostris; 75 typica dont 25 plus ou moins ortmanniens, tous avec le rostre

court ou assez court ; 200 Gardineri dont 50 avec des tendances ortmanniennes, tous avec

le rostre plutét court et armé au moins de quelques spinules sur la caréne dorsale.

Je n’ai pas trouvé dans la collection deux espéces signalées par M. Borradaile, l'une

avec certitude, la C. nalotica Roux, l'autre avec doute, la C. multidentata Stimpson ; les

autres espéces mentionnées par cet auteur sont la C. typus, la C. brevirostris, la C. sumalis

et la C. singhalensis; il est certain que M. Borradaile a déterminé sous le nom de

singhalensis les exemplaires de brevirostris 4 rostre fort court, et quant & la C. semilas,

jai montré plus haut qu'elle doit étre considérée comme une forme de la C. brevirostris.

Au total, les Caridines recueillies aux Seychelles comprennent environ 3760 exem-

plaires dont 1400 C. brevirostris typica, 2000 Gardineri (ou similis), 354 C. typus et

30 C. serratirostris, Cette dernitre espéce n’a pas été signalée par M. Borradaile, mais

peut-étre faut-il y rapporter les exemplaires que cet auteur attribuait avec doute & la

C. multidentata St.

i a

BOUVIER—LES CARIDINES DES SEYCHELLES 469

INDEX BIBLIOGRAPHIQUE

RELATIF AUX VARIATIONS DES CARIDINES ET AUX MUTATIONS DES ATYIDES.

1911. BrarincHem (L.). Les transformations brusques des étres vivants, 1911, pp. 187—195.

1908. Borpace (Edm.). Recherches expérimentales sur les mutations évolutives de certains

Crustacés de la famille des Atyidés. Comptes rendus Acad. des Sciences, vol. cxlvii,

pp. 1418—1421.

1909*. Id. Recherches expérimentales sur les phénoménes de régénération hypotypique chez

certains Crustacés de la famille des Atyidés. Id., vol. cxlviii, pp. 47—50.

1909. Id. Mutation et régénération hypotypique chez certains Atyidés. Bull. Scient. de la France

et de la Belgique, t. xlii, pp. 93—112.

1912. Id. Les nouveaux problemes de l’hérédité: la théorie de la mutation. Biologica, 2° année,

No. 18, pp. 161—175. :

1907. Borrapatte (L. A.) The Percy Sladen Trust Expedition, III. Land and Freshwater

Decapoda, Trans. Linn. Soc. London (2), Zool. t. xii, p. 67.

1904. Bouvier (KE. L.). Sur le genre Ortmannia Rathb. et les mutations de certains Atyidés,

Comptes rendus Acad. des Sciences, vol. exxxviii, pp. 446—449.

1905. Id. Observations nouvelles sur les crevettes de la famille des Atyidés. Bull. Scient. de la

France et de la Belgique, t. xxxix, pp. 57—134.

1909*. Id. Sur Ylorigine de l’évolution des Crevettes de la famille des Atyidés. Comptes, rendus

Acad. des Sciences, t. exlviii, pp. 1727—1731.

1909". Les Crevettes d’eau douce de la famille des Atyidés qui se trouvent dans l’ile de Cuba.

Bull. du Mus. d’Hist. nat. de Paris, 1909, pp. 327—336.

1912*%. Id. Sur la classification du genre Caridina et les variations extraordinaires d'une espéce de

ce genre, la Caridina brevirostris Stimpson. Comptes rendus Acad. des Sciences, t. 154,

pp. 915—922.

1912". Id. Les Caridines de Vile Maurice, d’aprés les envois faits au Muséum par M. le D" L.-G.

Barbeau. Bull. du Mus. d’Hist. nat. de Paris, 1912, pp. 291—303.

1910. Catman (W. T.). The Researches of Bouvier and Bordage on Mutations in Crustacea of the

Family Atyide. Quart. Journ. Micr. Science, vol. 55, pp. 785—797.

1911. Cutnor (L.). La genése des espéces animales, 1911, pp. 898—400 et p. 411.

1911. Hansen (H. J.). The Genera and Species of the Order Euphausiacea, with account of

remarkable variation. Bull. Inst. océanog. No. 210.

1892. DE MAN (J. G.). Decapoden des Indischen Archipels. Zool. Erg. Reise niederl. Ost-Indien

von Max Weber, B. ii, pp. 265—527.

1908. Id. On Caridina nilotica (Roux) and its varieties. Rec. Indian Mus., Vol. ii, 255—283.

1894, OrTMANN (A. E.). A Study of the systematic and geographical distribution of the Decapod

family Atyide Kingsley. Proc. Acad. Nat. Sc. Philadelphia, 1894, pp. 397—416.

470)

Les

PERCY SLADEN TRUST EXPEDITION

EXPLICATION DES PLANCHES.

PLANCHE 27.

1, La carapace vue de cété dans une femelle adulte de Praslin (No. 1); longueur post-orbitaire

5 mm. 2, hauteur maximum 4mm. D’aprés la structure du rostre qui est de longueur médiocre

cet exemplaire tient des trois formes de |’espéce.

. 2. Partie antérieure de la carapace et appendices céphaliques dans un male adulte de la forme

Gardineri capturé & Praslin (No. 2). Gr. 10.

. 8. L’arceau antennulaire vu en dessus dans sa partie médiane; § de la fig. 1. Gr. appr. 20.

. 4. Pédoncule antennaire vu par dessous dans la méme femelle. Gr. 20.

. 5. Maxillipede postérieur droit vu du cété ventral; les soies médianes du dernier article ne sont

ni assez nombreuses, ni assez serrées. f de la fig. 2. Gr. 20.

. 6. Portion de larticle basilaire du méme maxillipéde droit montrant l’épipodite avec son

prolongement triangulaire. Gr. 46.

.7. Doigt d’une patte ambulatoire antérieure; 2 de la fig. 1. Gr. 96.

. 8. Patte ambulatoire postérieure droite, face externe; * de la fig. 2. Gr. 20.

.9. Patte ambulatoire postérieure droite, face externe; @ de la fig. 1. Gr. 20.

.10. Doigt de la patte représentée dans la fig. 9. Gr. 96.

. 11. Bord antéro-inférieur de ?épimére droit du 1% segment abdominal; ¥* de la fig. 2. Gr. 20.

. 12. Le méme bord dans la ? de la fig. 1. Gr. 20.

. 13. Epimére droit du 4° segment abdominal; ¢ de la fig. 1. Gr. 20.

. 14. Epimére droit du 5° segment abdominal dans la méme femelle. Gr. 20.

.15. Endopodite du pléopode antérieur droit dans le ~ de la fig. 2; face postérieure (le bout

de l’endopodite est accidentellement réfléchi). Les soies, denticulées au bout, sont barbelées sur le

reste de leur étendue. Gr. 46.

. 16. Appendice interne de l’endopodite du 2° pléopode droit dans le méme male; face

postérieure. Gr. 96.

.17. Telson et uropode droit, vus de coté; 2 de la fig. 1. Gr, 20.

. 18. Angle formé par l’article basilaire des uropodes; ¢ de la fig. 2.

g.19. Extrémité de l’exopodite uropodial avec ses épines de soutien; $ de la fig. 2. Gr. 20.

ig. 20. Ligne articulaire de cet exopodite avec ses épines de soutien. Gr. 43.

5 Valle Extrémité du telson dans le méme individu. Gr. 43.

PLANCHE 28.

figs. 1 & 10 sont surtout consacrées & la réduction longitudinale du rostre, les suivantes a la

réduction de la carene ventrale.

Figs. 1 et 1’. Rostre et appendices céphaliques vus de cété (1) et dorsalement (2), dans une femelle

Gardineri de Praslin (No. 2). Gr. 10.

Figs. 2 et 2’. Les mémes parties dans une autre ? Gardineri de Praslin (No. 2). Gr. 10.

Figs. 3 et 3’. Les mémes parties dans une troisieme femelle Gardineri de Praslin (No. 2). Gr. 10.

Figs. 4 et 4’. Les mémes parties (sauf les pédoncules antennaires dans 4 et en outre les pédoncules

antennulaires dans 4’) chez une femelle adulte de Praslin (No. 1). Gr. 10.

Figs. 5 et 5’. Les mémes parties que dans la fig. 4 chez une femelle Gardineri ot l’'armature du rostre

est des plus réduites. Mahé, Chateau-Margot (No. 8). Gr. 20.

BOUVIER—LES CARIDINES DES SEYCHELLES 471

Figs. 6 et 6’. Rostre et appendices céphaliques dans une femelle Gardineri passant & typica. Praslin

(No. 2). Gr. 10.

Figs. 7 et 7’. Les mémes parties (mais seulement avec le rostre et les pédoncules oculaires dans 2’)

chez une femelle typica ot l’on voit encore la carene dorsale. Mahé, Cascade (No. 10). Gr. 10.

Figs. 8 et 8’. Rostre, avec les pédoncules oculaires et antennulaires dans la fig. 8, sans ces derniers

dans la fig. 8’, chez un male typica ot la caréne dorsale a disparu. Praslin (No. 1). Gr. 10.

Figs. 9 et 9’. Rostre et appendices céphaliques dans un male typica ou le rostre est arrondi, sans

traces de carénes impaires. Praslin (No. 2). Gr. 10.

Figs. 10 et 10’. Rostre et appendices céphaliques dans un male typica ot le rostre, dépourvu de

carenes impaires, atteint sa réduction maximum, encore qu'il présente une spinule dorsale. Praslin

(No. 1). Gr. 20.

Figs. 11 et 11’. Rostre et appendices céphaliques dans une femelle similis tres longirostre ot la caréne

ventrale est réduite & sa partie antérieure. Praslin (No. 2). Gr. 10.

Figs. 12 et 12. Rostre avec les pédoncules oculaires et antennulaires (sans ces derniers dans 12’), chez

une femelle Gardineri ot la caréne ventrale se réduit & une faible saillie postérieure. Praslin

(No. 2). Gr. 10.

Figs. 13 et 13’. Rostre avec les appendices céphaliques chez une femelle typica tres longirostre. Praslin

(No. 2). Gr. 10.

Figs. 14 et 14’. Rostre et parties voisines des appendices dans une femelle Gardineri a rostre court.

Praslin (No. 2). Gr. 10.

Figs. 15 et 15’. Rostre et parties voisines des appendices dans une jeune femelle typica ou la caréne

ventrale a disparu. Silhouette (No. 11). Gr. 20.

PLANCHE 29.

Figs. 1 et 1’. Chélipédes d’un male de Praslin (No. 1), Gardineri a pinces trés caridiniennes munies

d’un stylet terminal.

1. Chélipéde antérieur droit, face supéro-externe. Gr. 23.

1". Extrémité du doigt mobile de la pince, face interne, avec le stylet terminal et le premier rang

de soies denticulées d’un de ses bords. Gr. 96.

1’. Le stylet terminal et les deux premiéres soies denticulées d’un bord. Gr. 423.

1’. Chélipéde postérieur droit, face supéro-externe ; l’armature des doigts est la méme que dans le

chélipéde antérieur. Gr, 23.

Figs. 2 et 2’. Chélipédes d’un male typica recueilli & Praslin (No. 2); c’est le male de la fig. 9, Pl. 28.

2. Chélipede antérieur droit, face supéro-externe. Gr. 23.

2’. Chélipéde postérieur droit, face supéro-externe. Gr. 23.

Figs. 3 et 3’. Chélipédes d’une femelle Gardineri recueillie & Praslin (No. 2); c'est la femelle de la

fig. 3, Pl. 28. Ongle au chélipéde antérieur, stylet au postérieur.

3. Chélipéde antérieur gauche, face supéro-externe. Gr. 20.

3’. Chélipéde postérieur gauche, face supéro-externe. Gr. 20.

Figs. 4 et 4’. Chélipédes d’une femelle Gardineri & rostre médiocre. Praslin (No. 2). Ongle aux

chélipédes antérieurs dont la pince est ortmannienne, stylet aux chélipédes postérieurs qui sont

encore frés caridiniens.

4. Chélipéde antérieur droit, face supéro-externe. Gr. 23.

4°. Extrémité du doigt mobile de la pince, face interne avec l’ongle terminal et le premier rang

de soies denticulées d’un des bords. Gr. 96.

4°. La 9° soie de cette rangée. Gr. 423.

4°. La 14° soie de la méme rangée. Gr. 423.

4’, Chélipede postérieur droit, face supéro-externe. Gr. 23.

SECOND SERIES—ZOOLOGY, VOL. XV. 60

A472

PERCY SLADEN TRUST EXPEDITION

Figs. 5 et 5’. Chélipedes d’une femelle Gardineri ot larmature rostrale est des plus réduites. Mahé,

Fig.

Chateau-Margot (No. 8). C’est la femelle de la fig. 5, Pl. 28; le chélipéde antérieur est tres

ortmannien, le suivant un peu moins, les doigts de tous deux se terminent par un ongle.

5. Chélipéde antérieur droit, face supéro-externe. Gr. 23.

5’. Chélipéde postérieur droit, face supéro-externe. Gr. 23.

5. Ongle terminal des doigts de ce chélipéde, avec les trois premieres svies denticulées qui

lavoisinent. Gr. 211.

6. Chélipedes d’une jeune femelle typica recueillie & Silhouette (No. 11); cest la femelle de la

fig. 15, Pl. 28. Les chélipedes y sont presque aussi franchement ortmanniens que dans la forme

Ortmannia Edwardsi de la Caridina Richtersi, mais le carpe des chélipédes postérieurs n’a pas

encore d’échancrure distale et les doigts des deux chélipédes n’ont qu’un seul ongle au lieu de 5.

Cet individu, comme le précédent, réalise la forme pré-ortmannienne de l’espece.

6. Chélipede antérieur droit, face supéro-externe. Gr. 23.

6°. Ongle terminal du doigt mobile de ce chélipede avec les soies denticulées avoisinantes;

ces soies sont insuffisamment représentées, étant identiques 4 celles de 46. Gr. 96.

6’. Chélipéde postérieur droit, face supéro-externe. Gr. 23.

PERCY SLADEN TRUST EXPEDITION. TRANS. LINN. Soc,.SER.2.Z00L.VOL.AV. PL.27

(BOUVIER)

E.L B. del E Wilson,Cambridge

LES CARIDINES DES SEYCHELLES

———

PERCY SLADEN TRUST EXPEDITION TRANS. LINN. Soc,.SER.2.Z00L VoL.XV. PL. 28.

(BOUVIER)

E.L.B.del E Wilson, Cambridge

LES CARIDINES DES SEYCHELLES

PERCY SLADEN TRUST EXPEDITION. TRANS. LINN. Soc., SER.2.Z00L.VOL.XV PL

(BOUVIER)

E.LB del E Wilson, Cambridae

LES GARIDINES DES SEYCHELLES

[Nore.—Synonyms and Native Names are printed in italics.

INDEX.

Acamarchis dentata, Lamx., 141.

Acanthéphyrides, mentioned, 461.

Acanthonotiphila*, Zamb, 316.

coriacea*, Lamb, 316, fig. 316;

mentioned, 348.

Acari and their Dragonfly hosts

not at present understood, men-

tioned, 446.

Acarina of the Seychelies, by Cecil

Warburton, 349-360.

Achea cedipodina, Saalm., men-

tioned, 9.

Acherontia atropos, Linn., 15.

Acheta, Linn., 279.

bimaculata, De Geer, 279; men-

tioned, 263.

Acidalia consentanea, Walker, 16.

Acolus, Férster, 55.

lucidiceps*, Kieffer, 55.

zonatus*, Kieffer, 55.

Acrostichum aureum, Linn., 421;

mentioned, 408.

conforme, Sowerby, 420.

ellipticum, /ée, mentioned, 420.

glabrescens, Kuhn, 420.

latifolium, Sowerby, 420.

lineatum, Awhn, mentioned,

420.

neriifolium, Wadl/., mentioned,

421.

repandum, Baker, 412.

Blume, mentioned, 412.

salicifolium, Willd., 421.

simplex, var.

Baker, 420,

sorbifolium, Baker, 416.

spathulatum, Bory, 421.

spicatum, Linn, fil., 418.

tenuifolium, Baker, 416.

martinicense,

Acrostichum viscosum, Baker, 421.

var. glabrescens, Baker,

420,

Acrotylus, Fieber, 271.

patruelis (Herrich-Schaeffer),

271; mentioned, 263.

Acrydiide, par Dr Ignacio Bolivar,

263-292.

Actiniarian Pelagic Larvee, by Edith

E. Bamford, 395-406.

Actiniopteris australis (Linn. f.),

Link., 417; mentioned, 408.

dichotoma, Mett., 417.

Adeliopria, Ashmead, mentioned, 68.

Adeonella subsuleata, Smitt, 154;

mentioned, 138.

Adephaga and Lamellicornia, by

Hugh Scott, 215-262.

Adiantum caudatum, Linn., 416;

mentioned, 408.

caudatum, part Baker, 417.

rhizophorum, Sowerby,

mentioned, 408.

Adoretus, Castlenau,

tioned, 236.

insularis, Fairmaire, 235.

Fabr., mentioned,

235; men-

umbrosus,

236.

versutus, /7arold, 235; men-

tioned, 217, 218, 220, 262.

vestitus, Boheman, 235.

AXolopus, Fieber, 268.

aldabrensis*, Bolivar, 269.

var. A, 269.

var. B, 269.

var. C, 269.

dociostauroides*, Bolivar, 269.

mentioned,

famulus, Brunn,

268.

417 ;.

A star is added to names which

appear to be used for the first time.]

A®Molopus fasciatipes*, Bolivar, 270,

mentioned, 270.

laticosta*, Bolivar, 268.

perpusillus*, Bolivar, 270.

sansibaricus, Karsch, men-

tioned, 269.

strepens, Latr., mentioned, 269.

tergestinus, Charp., mentioned,

269.

thalassinus, Yabr., 271.

Aischna, Fabr., mentioned, 444.

ephippigera, Burm., 440.

guttatus, Martin, 440.

fEschnide, 440.

Alschnine, 440.

Aeschnine, Mediterranean, Boyeria

irene, Fonsc., mentioned, 444.

dimorphism in, mentioned, 444.

fBtea recta, Hincks, 139;

tioned, 137.

Agabus pulchellus, Klug, 260.

Agnara, Budde-Lund, 381.

madagascariensis, Budde- Lund,

381; mentioned, 368, 370.

Agriocnemis, Se/ys, mentioned, 436,

443, 444.

ewilis, Selys, 443.

pygmea, Selys, 443; men-

tioned, 435, 444, 445, 446.

Agrion glabrum, Burm., 443.

insulare, Se/ys, mentioned, 436.

men-

senegalense, Ramb., 443.

Agrionide, 441.

Agrionine, 442.

Agromyza, Fallén, 344.

wneiventris, Fallén, mentioned,

345, 346.

candidipennis*, Lamb, 345, fig.

346, mentioned, 348.

60—2

474

Agromyza capitata, Fallén, men-

tioned, 344.

funebris*, Lamb, 345, fig. 345;

mentioned, 348.

griseola, Vallén, 347.

pubicornis*, Lamb, 344, fig.

344; mentioned, 348.

similis*, Lamb, 346, fig. 346.

sp. 1 347, fig. 347. P

Agromyzide, by C. G. Lamb,

303-348.

Aldabra group, Ferns of the, by

Carl Christensen, 407-422.

Allocamptus, Zhoms, mentioned,

173.

Allodapa, Brunner, 274.

aliena, Brunner, mentioned,

274.

rostrata, Brunner, 274.

Allogobius, Waite, mentioned, 302.

Allolestes, Selys, mentioned, 442.

Maclachlani, Selys, 442 ; men-

tioned, 446.

nigra, Martin, 442; mentioned,

446.

Alloniscus, Budde- Lund, 385; men-

tioned, 382.

ambiguus, Budde-Lund, men-

tioned, 382.

brevis, Budde-Lund,

tioned, 385.

maldivensis, Borradaile, men-

tioned, 370, 386, footnote

386.

pallidulus, Budde-Lund, 385 ;

mentioned, 368, 369.

pigmentatus, Budde-Lund, 385;

mentioned, 3867-370, 382,

386, footnote 386, 394.

Budde-Lund,

men-

quisquiliarum,

384,

tomentosus, Budde-Lund, 384.

Allotrichoma, Becker, 324.

argentipretexta*, Lamb, 324 ;

mentioned, 348.

Amblyaspis, Forster, 78.

bifoveatus*, Kieffer, 79; men-

tioned, 78.

flavosignatus*, Kieffer, 78.

Amerus seychellensis*, Warburton,

355; mentioned, 350, 360.

speciosus, Pearce, mentioned,

355.

Amesicrium, Hnderlein, 190; men-

tioned, 181.

nanum, Hiderleim, 190.

INDEX

Amyna octo, Guen., 8.

Analyta calligrammalis,

27.

Anatrichus, Loew, 332.

arenaceus, Loew, 332.

Anax goliath, Selys, 440.

guttatus (Burm.), 440; men-

tioned, 446.

guttatus, Martin, 440.

Mabille,

tristis, Hagen, 440; mentioned, |

435.

Andrenide, 30.

Angara, Budde-Lund, 380.

lenta, Budde-Lund, 380 ; men-

tioned, 368, 370.

Angiopteris evecta (Yorst.), Hoffm.,

422; mentioned, 408.

Anguillide, 301.

Anillus, Jacquelin-Duval, 251.

cecus, Jacquelin-Duval, men-

tioned, 251.

sp.? 252; mentioned, 240, 241,

243.

Anisodactylus basicollis, Fairmaire,

249,

Anisomera, Meigen, 212; mentioned,

195.

ferruginea*, Hdwards, 212

mentioned, 214.

luteipennis*, Hdwards, 212

mentioned, 214.

Anisomerine, 212.

Anisomerini, mentioned, 195.

Anisomysis, Hansen, 126;

tioned, 127.

bifurcata*,

men-

Tattersall, 126;

mentioned, 138.

laticauda, Hansen, mentioned,

127.

Anisoptera, Latreille, 276.

conocephala, Linn., 276.

iris, Serville, 276.

maculata, Le Guillow, 276.

Anisopterous

tioned, 446.

Anochetus sp., 159.

Anomaloniscus ovatus, Dollfus, 385;

mentioned, footnote, 368.

Anteon, Jurine, 47.

oriphilus*, Kieffer, 47.

Anteonide, 45.

Anthomyza griseola, Fallén, 347.

Anthophora, Latreille, 37.

antimena, Saussure, 37 ; men-

tioned, 30.

Anthophoride, 37.

Dragonflies, | men-

Anthophorine, 37.

Antigastra catalaunalis, Dup., 28.

Antrophyum _ allifolium,

418; mentioned, 408.

immersum (Bory), Mett., 418 ;

mentioned, 408.

reticulatum, Baker, 418.

Aphiloscia, Budde-Lund, 389.

annulicornis, Budde- Lund,

389; mentioned, 368, 369,

370.

Aphiocheta, Brues, 107.

aculeipes*, Collin, 108 ; men-

tioned, 107, 109, 118.

brevis*, Collin, 113;

tioned, 108.

consueta*, Collin, 113; men-

tioned, 108, 114.

Blume,

men-

egena*, Collin, 110; men-

tioned, 107, 113, 118.

extans*, Collin, 112; men-

tioned, 108, 113, 114, 118.

formicarum, Verrall, mentioned,

109.

frontata*, Collin, 115; men-

tioned, 108.

innocens*, Collin, 112;

tioned, 108, 118.

invenusta*, Collin, 115; men-

tioned, 108.

latinervis*, Collin, 116; men-

tioned, 108, 114, 118.

men-

limbata, Brwes, 110; men-

tioned, 107, 118.

media*, Collin, 116; men-

tioned, 108.

mera*, Collin, 109; mentioned,

107.

planipes*, Collin, 114; men-

tioned, 108, 114, 118.

soluta*, Collin, 117; men-

tioned, 108, 118.

spreta*, Collin, 115; men-

tioned, 108, 118.

viduata*, Collin, 111; men-

tioned, 108, 110, 118.

Aphodiini, 223.

Aphodius lividus, Olivier, 223;

mentioned, 217, 218, 220.

lividus, Alluaudi, 223.

nigritus, Fabr., 223; men-

tioned, 217, 218, 220.

Apide, 40.

Apis, Linn., 40; mentioned, 41.

adansoni, Lat7., 41.

disjuncta, Fabricius, 39.

Apis unicolor, Zat., 40; mentioned,

29, 30, 41.

var, adansoni, Latr., 41.

Apoidea, 29-41.

Aptanogyna,

191.

Arzopterum goniophora, Hamps.,

mentioned, 11.

griseata, Hamps., 11.

minimale*, Mryer, 11.

Arctiade, 4.

Argina astrea, Drury, 14.

pardalina, Walker, mentioned,

14,

pylotis, Fabr., mentioned, 14.

Armadillo) murinus, Budde- Lund,

377.

parvus, Budde-Lund, 371.

simplex, Budde-Lund, 381.

simplex, Dollfus, 381.

testudinalis, Budde-Lund, 372.

Arrade erebusalis, Walker, 14.

massalis, Swinhoe, 14.

Asinchrona nesta, Fletcher, 11.

Aspidium elatum, Bojer, mentioned,

411.

capense, Willd., 412.

coriaceum, Sowerby, 412.

pleiotomum, Baker, 412 ; men-

tioned, 408.

procerum, Bojer, 411.

strigosum, Willd., 410.

Asplenium, JLinn., variation of

species of, mentioned, 415.

Borner, mentioned,

affine, Sowerby, 416; men-

tioned, 408.

Belangeri, Bory, mentioned,

414.

borbonicum, Hooker, men-

tioned, 415.

bulbiferum, Forst., 416; men-

tioned, 408.

caudatum, Vorst., 415; men-

tioned, 408, 415.

var. minor*, C. Chr., 415.

complanatum*, C. Chr., 414;

mentioned, 408, 415, 422.

cuneatum, Lam., 416;

tioned, 416.

var. affine, Baker, 416.

lineatum, Sowerby, mentioned,

415.

lunulatum, Sowerby, 414 ; men-

tioned, 408.

nidus, Zinn., 414; mentioned,

408.

men-

INDEX

Asplenium obtusatum, Forst., from

Australia, mentioned, 415.

pellucidum, Zam., mentioned,

415,

resectum, Sm., 414.

sechellarum, Baker, 414.

tenerum, VJorst., 414;

tioned, 408, 415.

unilaterale, Zam., 414; men-

tioned, 408.

viviparioides,

tioned, 416.

(Euasplenium) complanatum*,

C. Chr.,414; mentioned, 422.

Atenius, Harold, 225.

frater, Arrow, 226; mentioned,

217, 218, 220.

lodoicere*, Scott, 225; men-

tioned, 217, 218, 260, 262.

Atella phalantha, Drury, 18.

philiberti, Joann., 18.

Atopomyrmex — alluaudi,

mentioned, 161, 162.

foreli, Emery, mentioned, 162.

scotti*, Forel, 160.

steinheili, orel,

160, 161, 162.

Atya, Leach, mentioned, 457, 459,

461.

men-

Kuhn, men-

Emery,

mentioned,

bisuleata, Rand., mentioned,

460.

serrata, Spence Bate, men-

tioned, 460.

Atyaéphyra, mentioned, 461.

Atyide, mentioned, 461, 469.

Beine, 52.

Beus, Haliday, 52; mentioned, 53.

castaneus, Cresson, mentioned,

52.

curvatus*, Kieffer, 52.

Bamford, Edith E., Pelagic <Acti-

niarian Larvie, 395-406.

Baryconus, Yérster, 64.

calopterus*, Kieffer, 64.

Bathalus simplex, Dollfus,

tioned, 394.

Bathytropa thermophila, Dollfus,384.

Beania intermedia, Hincks, 142;

mentioned, 137.

Belyta, Jurine, 74.

exsul*, Kieffer, 74.

Belytide, 45, 74.

Bembidium (Tachys)

Coquerel, 250.

Bethalus, Budde-Lund, 381.

men-

bibulum,

475

Bethalus ecristatus, Dollfus, 381.

simplex, Budde-Lund, 381

mentioned, 368.

Bethylide, 45, 47.

Bidessus, Sharp, 254.

africanus, Régimbart,

tioned, 256,

capitatus, Légimbart, 254 ;

mentioned, 240, 242,255, 262.

var.(?), mentioned, 262.

men-

farquharensis*, Scott, 255;

mentioned, 240, 241, 242, 256.

geminodes, égimbart, men-

tioned, 255, 256.

var. zanzibarensis, Régim-

bart, mentioned, 255.

peringueyi, Régimbart, 256;

mentioned, 239, 240, 242,256,

pseudogeminus,

mentioned, 256.

hégimbart,

sechellensis, Régimbart, 256.

sp., 256; mentioned, 240.

thermalis, Germar, 254; men-

tioned, 240, 241, 242.

var. signatellus, Klug,

mentioned, 254,

thermalis, Sharp, 254.

Bifaxaria, Busk, mentioned, 145.

reticulata, Busk, mentioned,

145,

vagans*, Thornely, 145; men-

tioned, 137, 138, 157.

Blenniidz, 302.

“ Bois Rouge” (Wormia ferruginea,

Baillon), mentioned, 223.

Bolivar, Dr Ignacio, Orthoptera,

Acrydiide, Phasgonuride, Gryl-

lidee, 263-292.

and Ferriére, Charles, Or-

thoptera, Phasmide of the Sey-

chelles, 293-300.

Borboride from Seychelles,

James E. Collin, 101-104.

Borborus illotus,

tioned, 101.

venalicus, Osten Sacken, 102.

Bouvier, Eugtne L., Les Caridines

des Seychelles, 447-472.

Boyeria irene, Fonse., mentioned,

444,

Brachycara, Thomson, 95.

ventralis, Zhomson, 95.

Brachymyrmex patagonicus, Mayr.,

165,

Williston, men-

subsp. cordemoyi, /ore/,

165,

476

Brachythemis, Brawer, mentioned,

446,

Bradina aureolalis, Joann., 25.

Brunettia, Annandale, 424; men-

tioned, 423.

indica*, Haton, 424;

tioned, 423, 432.

Bryophila rederi, Standf., 11.

Bryophilopis reederi, Standf., 11.

Budde-Lund, Dr G., the late;

Terrestrial Isopoda, particularly

considered in Relation to the

Distribution of the Southern

Indo-Pacific Species, 367-394.

Bugula dentata, Lama., 141; men-

tioned, 137.

men-

gracilis, Busk, 141; men-

tioned, 137.

neritina, Linn, 141; men-

tioned, 137.

—— var. minima, Waters,

141; mentioned, 137.

var. ramosa*, Thornely,

142; mentioned, 137, 157.

var. rubra*, Thornely,

142; mentioned, 137, 157.

var. tenuata*, Zhornely,

142; mentioned, 137, 157.

uniserialis, Hincks, mentioned,

142.

Caberea boryi, Aud., 140; men-

tioned, 137.

var. zelanica, Busk, men-

tioned, 140,

rostrata, Busk, mentioned, 140.

Calogalesus*, Kieffer, 73.

parvulus*, Kiefer, 73.

Caloptera, Guérin, mentioned, 197.

Calopterygine, important subfamily,

never been met with in the Sey-

chelles, mentioned, 446.

Calyptotryphus, Sausswre,

tioned, 291.

Campion, Herbert, Odonata, 435-

446.

Camponotus

166.

—— subsp. aldabrensis, Forel,

166.

subsp. aldabrensis, Yorel ;

var. fryeri*, Forel, 166.

subsp. grandidieri, Forel,

166.

greeni, Morel, mentioned, 167.

maculatus, Forel, 165.

men-

foraminosus, orel,

INDEX

Camponotus subsp.

fulvus, Hmery ; var. octonotata,

Forel, 165.

subsp. radamex, Vorel ;

var. mixtella, Forel, 165.

thomasseti*, Forel, 166.

wedda, Forel, mentioned, 167.

Canace, Haliday, 328.

mahensis*, Lamb, 328; men-

tioned, 348.

nasica, Haliday,

328, 329.

ranula, mentioned, 328.

Canda retiformis, Powrtalés, 141;

mentioned, 137, 142.

Canthydrus, Sharp, 253.

biguttatus, Régimbart, 253.

notula, Hrichson, 253; men-

tioned, 240, 242.

notula, Sharp, 253.

Carabide, 245; mentioned, 241 ;

condition of the wings in the,

243.

Carabodes, Koch, mentioned, 351.

maculatus,

mentioned,

labyrinthicus, JZichael, men-

tioned, 350, 351.

—— var. clavatus*, War-

burton, mentioned, 350,

351.

Carausius, Stal, 294; mentioned,

293, 294, 296, 297.

alluaudi, Bolivar, 294; men-

tioned, 298.

alluaudi, Brunner & Redten-

bacher, 294.

bicornutus*, Ferriére, 295;

mentioned, 296.

gardineri*, Bolwar, 296 ; men-

tioned, 293, 298.

scotti*, Ferriére, 297, fig. 298 ;

mentioned, 293.

sechellensis, Bolivar,

mentioned, 296, 298.

sechellensis, Brunner & Redten-

bacher, 295.

Cardiocondyla emeryi, Forel, 163.

subsp. rasalame, orel,

163.

Caridina, Hdw., mentioned, 458.

angulata, Bouvier, from Mada-

gascar, 465.

apiocheles, Bowvier, mentioned,

465,

atyoides,

452.

brachydactyla, de Man, 463.

Nobili,

mentioned,

Caridina brevicarpalis, de Man,

from Célébes, 463.

brevirostris, Stimpson, men-

tioned, 447, 448, from Loo-

Choo, Seychelles, 464; origin

of important zoological varia-

tion in, 456-462; valuation

of, mentioned, 448-468.

brevirostris typica, Stimpson,

mentioned, 468, 471.

davidi, Bouvier, 464; men-

tioned, 454.

edulis, Bouvier, from Mada-

gascar, 465

ensifera, Schenkel, from Célebes,

463.

fossarum, feller, 463; men-

tioned, 465.

Gardineri, mentioned,

451, 467-472.

gracilirostris, de Man, men-

tioned, 466.

gracillima, Lanchester, 463.

grandidieri, Bouvier, from

Madagascar, 464.

isaloensis, Coutiére, 465 ; from

Madagascar, 464.

japonica, de Man, from Japan,

465.

levis, Heller, from Java, 460,

464.

madagascariensis, Bowvier, 464.

Mauritii, Bouvier, 464.

multidentata, Stimpson, men-

tioned, 447, 468; from

Célébes, 463.

nilotica, Rowx, 463; mentioned,

447, 460, 466, 468.

var. brachydactyla, de

Man, mentioned, 466.

pareparensis, de Man,

from Célébes, 464.

Man,

450,

464;

parvirostris, de from

Flores, 465.

propinqua, de Man, 463

richtersi, Thallw., 464; men-

tioned, 457, 459 footnote,

459, 460, 462, from Mau-

ritius, 464, 465, 472.

serratirostris, de Man, 463;

mentioned, 466, 467, 468.

similis, Bouvier, mentioned,

447, 450, 465, 467, 468,

471.

Simoni, Bouvier, from Ceylon,

463.

Caridina singhalensis, Ortmann,

465; mentioned, 447, 450, 452,

462; from Ceylon, 465, 468.

spathulirostris, Fichter, from _

Mauritius, mentioned, 464.

syriaca, Bowvier,mentioned, 465.

timorensis, de Man, from Timor,

465.

togoensis, Hilgend., from East

Africa, 464.

typa, Hdvw.,from Indo-Pacifique,

465; mentioned, 447, 448,

450, 466, 467.

typica, Hdw., mentioned, 450,

452, 453, 456, 457, 458, 460,

467, 468, 471, 472.

vitiensis, Borr., 462.

Weberi, de Man, from Flores,

Célébes, ete., 465.

Caridines des Seychelles, Les, par

Eugéne L. Bouvier, 447—472.

Casnoidea, Castelnau, mentioned,

245,

Casnonia, Latreille and Dejean,

mentioned, 245.

Catantops, Schawm, 273;

tioned, 263.

axillaris, Thunberg, 273.

brunneri, Karny, mentioned,

273.

insulanus, Karny, 273.

Catatasis*, Kertész, 96.

men-

clypeata*, Kertész, 97, 96,

figs. 1-4.

Catenaria lafontii, Aud., 139;

mentioned, 137.

otophora, Airkp., 139; men-

tioned, 137.

Catenicellabuski, Wyville-Thomson,

139.

erystallina, Wyville-Thomson,

139.

Catephia olivescens, Gwen., 9.

Catopsilia florella, Fabr., 18.

Celama, sp.? 4.

squalida (Stand.), 4.

squalida, Hamps., 4.

Cellepora costata, Mac,

mentioned, 138.

discoidea, Busk, 156.

foliata, MacG., 155.

longirostris, WacG., 154 ; men-

tioned, 138.

mamillata, Busk, 155.

megasoma, .VacG., 154; men-

tioned, 138.

154;

INDEX

Cellepora rota, MacG., mentioned,

154.

simplex, MacG., 155.

vagans, Busk, 154; mentioned,

138, 157.

Cephalochrysa*, Kertész., 99.

hova, Bigot, 99.

Cephaloscymnus, Crotch, mentioned,

365.

Cepheus, Koch, mentioned, 350.

Cephonodes hylas, Zinn. 15.

Ceraphron, Jwrine, 50.

saxatilis*, Kieffer, 50.

Ceraphronide, 45, 50.

Ceratina, Latreille, 34.

bakeri, H. S. Smith, men-

tioned, 36.

dentiventris, Gerst., mentioned,

36.

fryeri*, Cockerell, 34; men-

tioned, 29.

var. duponti*, Cockerell,

35.

madecassa, /riese, mentioned,

35.

nautlana, Cockerell, mentioned,

36.

nodosiventris*, Cockerell, 35 ;

mentioned, 29, 36.

tabescens*, Cockerell, 36; men-

tioned, 29.

Ceratinide, 34.

Ceratiosciara, Enderlein, 191; men-

tioned, 181.

corniculata, Hnderlein, 191;

mentioned, 194.

Ceratobeus, Ashmead, 53; men-

tioned, 54.

insularis*, Aveffer, 53.

Ceratocheilus, Wesché, 203; men-

tioned, 196.

cornigerum, Speiser, mentioned,

196, 204.

seychellarum*, Hdwards, 203 ;

mentioned, 196.

winn-sampsoni, Wesché, men-

tioned, 204.

Ceratopteris thalictoides (Linn.),

Brongn., 421; mentioned, 408.

Ceriagrion glabrum, Burm., 443 ;

mentioned, 446.

Cerianthidea, 399 ;

395.

Ceriops candolleana, Arn., Ophiusa

mentioned,

mercatoria, /abr., caught at the

flowers of, 19.

477

Ceropteris calomelanos, Linn., 416 ;

probably introduced in the Sey-

chelles and mentioned, 407.

Cetonia awrichalcea, Fabr., 237.

maculata, Kolbe, 237.

versicolor, Fabr., 236.

Cetoniini, 236.

Chalaraspis unguiculata,

Suhm., 121.

Chalciope hyppasia, Cramer, 8.

Charops, Holmgr., mentioned, 173.

Will.-

Chasminia sericea, Hamps., 7.

Cheilostomata, 139.

Chilomenes

361.

sex-maculata, abr.,

ab. interrupta, /abr., 361.

Chironomid, 208.

Chlenii, African, mentioned, 241.

Chlenius Bonelli, 247.

bisignatus, Dejean, 247 ; men-

tioned, 240, 241.

Chloridea armigera, Hiibner, 6.

assulta, Guen., 6.

Chloroclystis metallicata, Fletcher,

16.

sp.? 16.

Chloromyia formosa, Scop., men-

tioned, 99.

stigmatica, v. d. Wulp., men-

tioned, 99.

Chloropide, by C. G. Lamb, 303-

348.

Chloropine, 329.

Chloropisca callichroma, Loew,

mentioned, 329.

Chonocephalus, Wandolleck, 105.

kiboshoénsis, Brués, men-

tioned, 105, 106.

mexicanus, Silvestri, men-

tioned, 105,

similis, Brués, 105.

sp.? ¢, 105.

Christensen, Carl, On the Ferns

of the Seychelles and the Aldabra

Group, 407-422.

Chrysonotus

tioned, 99.

Chrysopimpla ornatipes, Cameron,

170.

Chusaris nigerrimalis*, Pryer, 13 ;

mentioned, 28.

hovas, men-

Bigot,

novatusalis, Walker, 13.

oculalis, Moore, 13.

Cicindela, Linn., 243; mentioned,

240.

congrua, Klug, 244.

478

Cicindela melancholica, Fabr., 243 ;

mentioned, 241, 242, 244.

subsp. trilunaris, Klug,

244; mentioned, 240, 241.

Dejean,

var. perplexa,

241, 244, 245.

var. seychellensis*, Scott,

244; mentioned, 240, 241,

245,

tenuilineata, Allwaud, 244;

mentioned, 245.

trilunaris, Klug, 244.

aldabrica,

Kolbe,

var.

244,

var. perplexa, Dejean,

mentioned, 244.

Cicindelide, 241, 243.

Cirphis leucosticha, Hamps., 7.

loreyi, Dup., 7.

Cirrochrista perbrunnealis, /Jetcher,

23:

Cladolipes, Zoew, mentioned, 212.

Cletthara valida, Walker, 8.

Coccinellide, par le Dr Sicard,

361-366.

Cockerell, T. D. A., Hymenoptera,

Apoidea, 29-41.

“ Coco-de-Mer” (Lodoicea sechel-

larum, Labille), mentioned, 226.

Coleoptera, Coccinellide, par le

Dr Sicard, 361-366. j

— Lamellicornia and Ade-

phaga, by Hugh Scott, 215-

262.

Collin, James E., Diptera, Borbo-

ride from Seychelles, 101—104.

Phoridee, from Seychelles,

105-118.

Colliuris, Degeer, mentioned, 245,

Comaserica, Brenske, 232.

granulipennis, Yairmaire, 232;

mentioned, 217, 220.

granulipennis, Brenske, 232.

Comostola lesaria, Walker, 16.

Comostolopis simplex, Warren, 16.

Conipoda, Saussure, 271;

tioned, 263.

aldabre, Sausswre, 271.

calcarata, Saussure,

tioned, 271.

Conocephaloides, Perkins, 275.

acuminatus, Yabr., mentioned,

men-

275.

breviceps, Redtenbacher, 275.

chagosensis*, Bolwar, 275;

mentioned, 292.

INDEX

Conocephaloides insulanus, /edten-

bacher, mentioned, 275.

lineatipes, Bol., mentioned, 276.

nitidulus, Scopoli, 276.

pallidus, edt.,

275.

Conocephalus, auct., 275.

Conostigmus, Dahlbom, 50.

seychellensis*, Kieffer, 50.

Copelatus, Hrichson, 257 ;

tioned, 242, 260; larva

tioned, 260.

apicalis, Fairmaire, 258.

gardineri*, Scott, 257 ;

tioned, 240, 242, 258.

pandanorum*, Scott,

mentioned, 225, 240,

260, 262.

pulchellus, Alug, 260 ;

tioned, 240, 242.

pulchellus, Sharp, 260.

regimbarti, airmaire, men-

tioned, 258; from Mada-

gascar, mentioned, 258.

Coptottigia*, Bolivar, 267; men-

tioned, 263.

cristata*, Bolivar, 267; men-

tioned, 292.

Cordulia similis, Ramb., 440. _

Corduliins, 440.

Cosmophila erosa, Hiibner, 10

Crabro _ (Dasyproctus) _scotti,

Turner, mentioned, 44.

mentioned,

men-

Crambus auronivellus*, Fryer, 22 ;

mentioned, 28.

seychellellus, /letcher,

tsp.? 22.

Cranaé, Stal, mentioned, 272.

Craspedra actuaria, Hamps., 16.

minorata, Boisd., 16.

DY)

aa.

Cremastogaster gibba, Hmery, 164.

rasoherine, Forel, 164.

Cremastus, Gravenh., 175.

decoratus, Holmgr., mentioned,

176.

punctus*, Morley, 175.

schoenobius, Zhomson (=de-

coratus, Holmgr.), men-

tioned, 176.

Cribrilina, Jullien,

annulata, JFabr., mentioned,

145.

figularis, Johnston, 144; men-

tioned, 138.

radiata, Moll., 144; men-

tioned, 138.

Cribrilina radiata, var. flabellifera,

Kirkp., 144; mentioned, 138.

reticulata*, Zhornely, 144;

mentioned, 137, 138, 157.

Crisia boryi, Aud., 140.

conferta, Bush, 156;

tioned, 138, 157,

Crocidolomia binotalis, Zeller, 27.

Crocothemis,, Brauer, mentioned,

446.

Cryptine, 169.

men-

| Cryptoblabes plagioleuca, Zurner,

24.

sp.! near plagioleuca, Turner,

24.

Cryptogonus orbiculus, G'y//., men-

tioned, 362.

Cryptus notulatorius, Fabr., 170.

Cubaris, Brandt, 377.

murina, Brandt,

tioned, 368-370.

murina, Budde-Lund, 377.

officinalis, Stebbing, 371.

Culex, Zinn., 86; mentioned, 81.

estuans, Wiedem., 88.

albopictus, Skuse, 82.

annulitarsis, Macq., 81.

anxifer, Coquerell (Bigot),

88.

bancroftii, Skuse, 82.

calopus, Meigen, 81.

elegans, Ficalbi, 82.

exagitans, Walker, 82.

excitans, Walker, 82.

fatigans, Wiedemann,

mentioned, 81.

Jormosus, Walker, 81.

JSrater, Rob. Desv., 81, 82.

impatabilis, Walker, 82.

inexorabilis, Walker, 81.

konoupi, Brullé, 81.

mosquito, Arrib., 82.

mosquito, Rob. Desv., 81.

pallipes, Meigen, 88.

pipiens, Linn., mentioned, 89,

pungens, Wiedem., 88.

rossii, Giles, 82.

scottii*, Theob., 86, figs. 4, 5;

87, figs. 6, 7; mentioned,

94.

scutellaris, Walker, 82.

teniatus, Wiedem., 81.

377; men-

88 ;

toxorhynchus, Macq., 81.

variegatus, Doleschall, 82.

viridifrons, Walker, 81.

zonatipes, Walker, 82.

Culicelsa, /elt., 84; mentioned, 81.

fryeri*, Theob., 84 ; mentioned,

85, fig. 3.

Culicidee, by Fred. V. Theobald,

81-94,

Culladia admigratella, Walker, 22.

Curtilla, Oken, 278.

africana, Pal. de Beauv., 278 ;

mentioned, 263.

Cyathea sechellarum, JJett., 410;

mentioned, 408.

Cyatheacer, 410.

Cybister, Curtis, 261.

africanus, subsp., Kolbe, men-

tioned, 261.

aldabricus, subsp., Kolbe, men-

tioned, 261.

cinctus, Sharp, from Mada-

gascar, mentioned, 261.

tripunctatus, Olivier, 261;

mentioned, 240, 242.

subsp. africanus,

mentioned, 261.

—— subsp. aldabricus, Kolbe,

mentioned, 261.

Cyclophorus spissus (Bory), Desv.,

419; mentioned, 408.

Cyclostomata, 156.

Cydonia lunata, Fabr., ab. sul-

phurea, Olivier, 361.

Kolbe,

Cylindrecium giganteum, Bush,

157; mentioned, 138.

Cynthia thompsoni, Milne-Edw.,

122.

Cyrtacanthacris, Walker, 273.

tatarica (Linn.), Stal, 273.

Dactylactis, v. Beneden, 399.

cerfensis*, Bamford, 399; men-

tioned, 406.

Dameine, 350, 355.

Dameus complanatus*, Warburton,

356 ; mentioned, 350, 360.

nitens, Koch, mentioned, 354.

retiarius*, Warburton, 355;

mentioned, 350, 360.

speciosus, Pearce, mentioned,

355.

Danais chrysippus, Linn., 17.

Darea bifida, Bory, mentioned, 415,

Dasysciara, Kieffer, mentioned, 191.

Davallia cherophylloides (Poir.),

Steud., 413; mentioned, 408.

denticulata, Burm., 413.

var. intermedia, Mett.,

413.

INDEX

Davallia elata, Baker, 413.

Hornei, Baker, 414.

pedata, Sowerby, 413.

spelunce, Baker, 413.

tenuifolia, Sowerby, 413.

Deilemera seychellensis, Hamps.,

14,

Deilephila nerii, Linn., 15.

Diachoris intermedia, Busk, 142.

Diapria, Latreille, 71; mentioned,

TAS

mahensis*, Aieffer, 73 ;

tioned, 71.

men-

saxatilis*, Aveffer, 73; men-

tioned, 71.

scotti*, Aieffer, 72; mentioned,

(fle

seychellensis*, Kieffer, 72;

mentioned, 71, 73, 80.

Diapriide, 45, 68.

Diathraustodesleucotrigona, Hamps.,

25.

Dicamptus, Szepligeti, 173.

Dicolus, Forster, 177.

equatorius*, Morley, 177 ; men-

tioned, 178.

Dicranomyia, Stephens, 197; men-

tioned, 196, 199, 201.

afra, Fabr., mentioned, 196.

consimilis, Lergroth, men-

tioned, 196, 197.

gardineri*, Hdwards, 197 ;

mentioned, 196, 214.

pulchra, Loew., mentioned,

196.

saltans, Doleschall, mentioned,

211.

seychellarum, mentioned, 198.

spadicithorax*, Hdwards, 198 ;

mentioned, 196.

sp., 198.

tangentialis,

tioned, 196, 197.

tipulipes, Aarsch, 197; men-

tioned, 196, 214.

umbrata, Meijere, mentioned,

201, 202.

vicarians, Schiner, mentioned,

196, 198.

(Thrypticomyia) saltans, Dole-

schall, mentioned, 211.

Dicranoptycha, Osten-Sacken, men-

tioned, 196.

Dioctes, Férster, 174.

vulgaris, Morley, 174.

Dioryche, Macleay, 249.

Speiser, men-

SECOND SERTES—ZOOLOGY, VOL. XV.

479

Diorycheinterpunctata, Dejean, 249;

242, 243.

interpunctata, Alluaud, 249.

Diplacodes lefebvrei (Ramb.), 437 ;

mentioned, 435.

lefebvrei, Ris, 437.

mentioned, 240,

trivialis (Ramb.), 437; men-

tioned, 436, 446.

trivialis, Ris, 437.

Diplazium polypodioides, Blume,

mentioned, 414.

sechellarum, Baker, 414 ; men-

tioned, 408.

Diplonema, Annandale, 424.

Diploptera, 43-44.

Diptera, Borboridz from Seychelles,

by James E. Coliin, 101-104.

Culicidee, by Fred. V. Theobald,

81-94.

Loncheide, Sapromyzidee, Eph-

ydride, Chloropide, Agromy-

zide, by C. G. Lamb, 303-

348.

Phoridz from Seychelles, by

James E. Collin, 105-118.

Psychodride, by Rev. A. E.

Eaton, 423-432.

Sciaride, von Dr Gunther

Enderlein, 181-194.

Stratiomycide, by Dr K.

Kertész, 95-104.

Tipulide, by F. W. Edwards,

195-214.

Diptychophora minutalis, //amps.,

mentioned, 23.

muscella*, Fryer, 23,

tioned, 28.

Dirades theclata (Guwen.), 17.

men-

Discocerina, Macg., mentioned,

324.

Discomyza, Meigen, 320.

incurva, Meigen, mentioned,

320.

similis*, Lamb, 320, fig. 321.

Discoporella holdsworthii, Busk,

Raye

Dissomphalus, Ashmead, 49.

excisicrus*, Aveffer, 49.

Dociostaurus genei, Ocsk., mentioned,

270.

Dohrniphora, Dah/, 106; mentioned,

107.

cleghorni, Ligot, 106 ;

tioned, 107, 118.

divaricata, A//rich, mentioned,

107.

men-

480

Dohrniphora divaricata, var. per-

plexa, Brues, mentioned, 107.

dohrni, Dahl, mentioned, 107.

papuana, rues, mentioned,

107.

sp.? 107; mentioned, 118.

Dolichopidze, mentioned, 312.

Draba

457,

Dragana pansalis, Walker, 10.

Dragonflies, 435-436.

anisopterous, mentioned, 446 ;

verna, Linn., mentioned,

water-mites clustering on

wings of, mentioned, 446.

colour dimorphism in,

tioned, 444.

hosts of,

446.

structural

men-

Acari, mentioned,

dimorphism in,

mentioned, 444.

Dryinide, 45.

Dryopteris — chrysotricha,

tioned, Baker, 412.

cucullata, Blume, 411; men-

tioned, 408.

men-

effusa, Sowerby, mentioned,

411.

Hornei, Saker, 412; men-

tioned, 408.

mauritiana (Fée), C. Chr.,

411; mentioned, 408.

var. Gardineri*, C. Chr,

411.

mollis, Jacg., mentioned, 411.

parasitica, ZLinn., 411; men-

tioned, 408.

strigosa, Willd.,

tioned, 408.

tomentosa, 7’howars, mentioned,

410.

unita, Linn. 411.

Wardii, Baker,

tioned, 408.

Dynastini, 229.

Dytiscide, 241, 253.

Dytiscus leander, Rossi, 260.

tripunctatus, Olivier, 261.

men-

410;

411;

men-

Kagris sabadius, Gray, 20.

20; mentioned, 28.

Earias insulana, Loisd., 11, prob-

ably introduced with

plant (Gossypium), 11.

Eaton, Rev. A. E., Diptera, Psy-

chodide, 423-432.

cotton

var. aldabranus*, Mryer, |

INDEX

Katon, Rev. A. E., Ephemeridee,

433-434.

Eatonisca,

430.

Echthromorpha, Holmgr., 170.

continua, Krieg., 170.

leva, Cameron, 170;

tioned, 170.

var. insulana,

mentioned, 170.

latibalteata, Cameron, 170.

notulatoria, Yabr., 170.

iil

Meunier, mentioned,

meni-

rufa, Cameron,

tioned, 171.

rufo-maculata, Cameron, 170.

variegata, Brullé, 170.

variegata, Krieg., 170.

(Stagnopimpla) hyalina, Sawss.,

mentioned, 171.

Eetatoderus, Guérin, 281.

pallidigeniculatus,

mentioned, 282.

men-

Brunn.,

squamiger*, Bolivar, 282.

Edwards, F. W., Diptera, Tipu-

lide, 195-214.

Elaphoglossum ecallifolium (Blume),

7. Moore, mentioned, 420.

conforme, Sowerby, 420; men-

tioned, 408.

Hornei*, C. Chr., 420; men-

tioned, 408, 422.

latifolium, Sowerby, 420; men-

tioned, 408.

martinicense (Desv.), 7’. Moore,

mentioned, 408, 420.

var. obtusum*, C. Chr.,

420.

petiolatum

(Sowerby), Urb.,

421; mentioned, 408, 421. |

var. salicifolium, Willd.,

421,

Sieberi, Hooker & Grev., men-

tioned, 420.

simplex, Sowerby, mentioned,

420.

spathulatum (Bory), 7. Moore,

421; mentioned, 408.

Elassochiton selika, var. aldabren-

sis, Kolbe, 238.

Elephantomyia, Osten-Sacken, 203.

Edwards, 203 ;

mentioned, 196. ;

wahlbergi, mentioned, 196,

Enchastes*, Lamb, 319.

scotti*, Lamb, 320 ; mentioned,

348,

insularis*,

Krieger, |

Enderlein, Dr Giinther, Diptera,

Sciaridse, 181-194.

Endotricha flavofascialis*,

24+: mentioned, 28.

mesenterialis,

Fryer,

Walker, 24;

mentioned, 25.

vinolentalis, Rag., 24.

Enicospilus antarkarus, Sauss.,

173.

leionotus, Tosquinet, 173.

Enneascello*, <ieffer, 59; men-

tioned, 80.

exaratus*, Aveffer, 59; men-

tioned, 80.

Entalophora proboscidea, Ztlne-

Edw., 156; mentioned, 138.

Entomacis, /érster, 69 ; mentioned,

68.

curticornis*, Aveffer, 70 ; men-

tioned, 69.

longicornis*, Kieffer, 69.

Entomopria*, Aveffer, mentioned,

68.

solida, Vhoms., mentioned, 68.

Epacromis pusilla, Walker, men-

tioned, 271.

rufostriata, Airby, mentioned,

270.

tamulus, Fabr., 270.

var. pusilla, Bolivar, 270.

Ephemeride, by Rev. A. E. Eaton,

433-434.

| Ephestia cautella, Walker, 23.

Ephydride, by C. G. Lamb, 303-

348.

Ephydrine, 326.

Epicrocis, n.sp.? 23.

Epiplema moza, Butler, 17.

Epiplemide, 17.

Ercta ornatalis, Dup., 26.

Eretes, Castelnau, 261.

sticticus, Linn. 261;

tioned, 240, 242.

helvolus,

men-

—— var. Klug,

mentioned, 261.

sticticus, Sharp, 261.

Kriocera, Macquart, 212;

tioned, 195, 197.

fuscinervis*, Hdwards,

mentioned, 214.

obscuripennis*, Hdwards, 212;

mentioned, 213, 214.

Erioptera, Osten-Sacken, 209; men-

tioned, 211.

albicapitella*, Hdwards, 209.

maculosa*, Hdwards, 209.

men-

213;

Eriopterini, 195, 208.

Eriopus maillardi, Guen., 7.

yerburi, Hamps., 7.

yerburil, butler, 7.

Erythragrion, Selys,

445,

Eschara ciliata, Pallas, 146.

Kscharella rostrigera, Simitt, men-

tioned, 151.

Etiella zinckenella, Z’reits., 24.

Euasplenium complanatum, C. Chr.,

414.

Eublemma costimacula, Saalm., 10.

plagiopera, Hamps., 10.

Euchetomera, G. O. Sars, 125.

glyphiophthalma, ///ig., men-

tioned, 126.

limbata, Ulig., 125.

125 ;

mentioned,

oculata, Hansen, men-

tioned, 126.

typica, G. O. Sars, 125; men-

tioned, 120.

Eueopia, Dana, 121; mentioned,

120.

australis (pars), G. O. Sars,

121.

seulpticauda, Maxon., 122.

sculpticauda, Hansen, 122.

unguiculata, W2ll.-Swhm., 121,

unguiculata, Hansen, 121.

Eucopiide, 121.

Eugenia-trees, mentioned, 428.

Rulalia, Meigen, 96.

wqualis, Walker, 96.

Eumenes, abr., 43.

alluaudi, Pérez, 43; mentioned,

44.

Eumenide, 43.

Euphausia, Dana, 130,

Euphausia (pars), Sars, 132.

Euphausia, Stebbing, 132.

Luphausia (pars), Tattersall, 132.

gibba, Hansen, mentioned,

gracilis, Dana, 132.

gracilis, G. O. Sars, 131.

hemigibba, Hansen, 151; men-

tioned, 120.

latifrons, Hansen, 132.

latifrons, G. O. Sars, 132.

latifrons, Stebbing, 132.

latifrons, Tattersall, 132.

mutica, Hansen, 130.

mutica, Tattersall, 130.

pellucida (pars), G. O. Sars,

130.

INDEX

Luphausia paragibba, Hansen, 131.

similis, G. O. Sars, 131.

var. crassirostris, //ansen,

mentioned, 131.

similis, Hansen, 131.

tenera, Jansen, 131; men-

tioned, 132.

Euphausiacea, and Mysidacea, col-

lected in Indian Ocean during

1905, by W. M. Tattersall, 119-

136.

Euphausiide, 128.

Euplea mitra, Moore, 17.

Eurrhyparodes tricoloralis, Zeller,

Euseyrtus, Guérin, 292.

bivittatus, Guérin, 292.

var. abbreviatus, Bolivar,

mentioned, 292.

var. fuscinervis, Bolivar,

mentioned, 292.

Eutelia inextricata, Moore, 8.

Euxoa microtica, Hamps., 7.

Kuzophera scabrella, Hag., 23.

Evanioptera, Guérin, mentioned,

197.

Evyleus nicolli*, Cockerell, 32.

Exochomus leviusculus, Weise, 361.

men-

nigromaculatus, Croeze,

tioned, 361.

Farella atlantica, Busk, 157; men- |

tioned, 138.

gigantea, Busk, 157.

Fenestrula hyadesi, Jullien, 146.

Ferns, On the, of the Seychelles,

and the Aldabra Group, by Carl

Christensen, 407-422.

Ferriére, Charles, Bolivar,

Dr Ignacio, Orthoptera, Phas-

and

mide of

300.

Ficalbia, 7'heob., mentioned, 90, 92.

inornata, 7'heob., mentioned, 81.

nigripes, Zheob., mentioned,

81, 90.

Figulus, Macleay,

D6, 223:

marginalis, Ritsema, mentioned,

footnote, 221, 223.

221; mentioned,

seychellensis*, Scott, 222; men-

tioned, 217, 218, footnote,

221, 223; from a decaying

branch of ‘ Bois Rouge”

(Wormia ferruginea, Buill.),

mentioned, 223.

the Seychelles, 293- |

481

Figulus striatus, Olivier, 221; men-

tioned, 217-220.

striatus, Alluaud, 221.

Fishes, New, from Aldabra and

Assumption, collected by Mr J.

(OL 1, Fryer ; by C. Tate Regan,

301-302.

Flustra bouchardii, Aud., 144.

Fryer, 9;

aldabrana™*, ;

Fodina

mentioned, 28.

pentagonalis, mentioned, 10.

Forel, A., Fourmis des Seychelles

et des Aldabras, recues de

M. Hugh Scott, 159-167.

| Fourmis des Seychelles et des

Aldabras, regues de M. Hugh

Scott par <A. Forel, 159-

167.

Fryer, J. C. F., Lepidoptera of

Seychelles and Aldabra, exclusive

of the Orneodide and Pteropho-

ride and of the Tortricina and

Tineina, 1-28,

Fryeria*, Bolivar, 291 ; mentioned,

292.

aphonoides*, Bolivar, 291;

mentioned, 292.

Fureomyia, Coqui//et, mentioned,

196.

| Galesus, Curtis, mentioned, 74.

Gamasoid mites, tubes of the huge,

mentioned, 349.

curious, mentioned, 358.

Gampsocera, Schiner, 331.

scutellata*, Lamb, 331; men-

tioned, 348.

scutellata, Heeger, mentioned,

Spills

Gastrimargus, Saussure, 271.

marmoratus, .Zhunberg, 271;

mentioned, 263,

Gastrosaccine, 125.

Gastrosaccus, Vorman, 125.

indicus, Hansen, 125

parvus, Hansen, 125.

Gaurax, Loew, 336.

ephippium, Ze/ferstedt,

tioned, 337.

men-

seychellensis*, Lamb, 336;

mentioned, 3548.

Gedania, Budde-Lund, mentioned,

382.

Gemellaria avicularis, Pieper, 139.

Gemellipora glabra, form striatula,

Smitt, 149; mentioned, 138.

61—2

482

Gemellipora lata, Smitt, 149; men-

tioned, 138.

striatula, Smitt,

tioned, 138.

Gemmaria variabilis, Duerden, men-

tioned, 395.

Geometride, 15.

Geotrupes truncatus, Klug, 229.

149;

men-

Geranomyia, Haliday, 200.

(Monophana) —immaculata™*,

Edwards, 200; mentioned,

196, 214.

Gleichenia dichotoma, Baker, 422.

linearis (Burm.), C. B. Clarke,

422 ; mentioned, 408.

Gleicheniacexe, 422.

Glycyphana versicolor, Alluaud,

236,

Glyphodes india, Sawnd., 27.

sericea, Drury, 26.

sinuata, Fabr., 27.

stolalis, Guen., 27.

subamicalis, Fletcher, 27.

tritonalis, Snellen, 27.

unionalis, Htibner, 27.

Gnathophausia, Will.-Suhm., 121;

mentioned, 120.

bengalensis, Wood-Mason, 121.

calearata, G. O. Sars, 121.

calcarata, Ortmann, 121.

Gobiidx, 302.

Gomphine, important subfamily,

never been in the

Seychelles, mentioned, 446.

Gonomyia, Meg., mentioned, 208.

Theobald, mentioned,

met with

Grabhamia,

86.

Greffea, Brunner, 299 ; mentioned,

293, 294, 300.

lifuensis, Sharp,

300.

seychellensis*, Ferriere, 299 ;

mentioned,

mentioned, 293.

Grammodes delta, Boisd., 8.

geometrica, Mabr., 8.

stolida, Fabr., 8.

Gronocerus felina, Gerst , mentioned,

30.

Gryllacridide, 278.

Gryllacris, Serville, 277.

fryeri*, Bolivar, 277.

sechellensis, Bolivar, 277.

Gryllapterus*, Bolivar, 284; men-

tioned, 263, 292.

tomentosus*, Bolivar, 285;

mentioned, 292.

INDEX

Gryllide, par Dr Ignacio Bolivar,

263-292.

Gryllomorpha,

278, 284.

Gryllotalpa, Latreille, 278.

Gymnoscelis tenera, Warren, 16.

Fieb., mentioned,

Gynacantha, Lamb., mentioned,

441.

bispina, Ramb., mentioned,

441,

stylata (Martin), 440; men-

tioned, 435, 441, 446.

stylata, Martin, 440.

Hadena littoralis, Boisd., 7.

Hadronotus, Férster, 56.

festivus*, Kieffer, 56.

saxatilis*, Kieffer, 56.

Hagenulus, Haton, 433.

caligatus, Hagen MS., men-

tioned, 434.

scotti*, Haton, 433, fig. 433.

Halictine, 31.

Halictus, Latreille, 31.

aldabranus*, Cockerel/, 31;

mentioned, 29.

cooleyi, mentioned, 33.

diversus, Smith, mentioned,

flavovittatus, W. F. Kirby,

mentioned, 32.

geigeria, Cockerell, mentioned,

33.

mahensis, Cameron, 33; men-

tioned, 29, 34.

mahensis race _ praslinensis*,

Cockerell, 34.

minikoiensis, Cameron, men-

tioned, 33.

nicolli*, Cockerell, 32; men-

tioned, 29, 33.

spp., mentioned, 30.

(Evyleus) nicolli*, Cockerell,

Hecamede, Haliday, 318.

albicans, Meigen, mentioned,

318.

lacteipennis*, Lamb, 318, fig.

318; mentioned, 348.

Hellula undalis, Fabr., 27.

Hemianax ephippiger (Burm.), 440;

mentioned, 446.

ephippiger, Martin, 440.

Hemicnemis bilineata, Selys, 442 ;

mentioned, 443.

cyanops, Selys, 443.

Hemicordulia, Selys, mentioned,

440,

delicata, Martin, 440.

similis (Ramb.), 440;

tioned, 446; from Madagas-

car, mentioned, 446.

similis, Martin, 440.

Hemisiriella, Hansen, 123; men-

tioned, 124.

gardineri*, Tattersall,

mentioned, 124, 136.

parva, Hansen, mentioned, 124.

pulchra, Hansen, mentioned,

124.

Hemiteles cingulatorius*, Morley,

169; mentioned, 170.

Bridg.,

men-

123:5

subannulatus, men-

tioned, 170.

Henicospilus, Stephens, 173.

anceps, Tosquinet, 173.

antarkarus, Sauss., 173.

leionotus, Z'osquinet, 173.

var. longicornis*, Morley,

Was

longescutellatus, Ariechb., 173.

Heriades, Spinola, 39.

aldabranus*, Cockerell,

mentioned, 29.

argentatus, Gerst., mentioned,

39)

carinatus, Cresson, mentioned,

39.

truncorum, Linn., mentioned,

39. ae

Hermannia, WVic., mentioned, 351.

convexa, OC. L. Koch, 351 ; men-

tioned, 350.

nasata*, Warburton, 356 ; men-

tioned, 350, 360.

Herse convolvuli, Zinn., 15.

Hesperidee, 20.

Heterographis insularella, Rag., 23.

Heteronycha dolosa, Arrib., 88.

Heterotrypus, Saussure, 290.

africanus, Sawsswre, mentioned,

30k

291.

funambulus, Saussure, from

Nouvelle Guinée, mentioned,

291.

insularis*, Bolivar, 290; men-

tioned, 292.

laqueatus, Karsch, mentioned,

291.

maculosus, Karsch, mentioned,

291.

Hexactinian Larve, 402.

Hippelatas, Loew, 333.

femorata*, Lamb, 336.

longiseta*, Lamb, 334, fig.

334; mentioned, 336, 348.

minor, mentioned,

334.

nigrescens, Lamb, 335.

nigricornis, Thomson, 333.

stigmatica*, Lamb, 334, fig.

334.

Hippothoa pes-anseris, Smitt, 149.

Meijere,

spongitis, Smitt, 148.

Hippotion aurora, Rothsch. & Jord.,

15.

eson, Cramer, 15.

osiris, Dalm., 15.

Histiopteris incisa (7hunb.), J. Sm.,

417; mentioned, 408.

Holoporella albirostris, Smitt, 155 ;

mentioned, 138.

discoidea, Busk,

tioned, 138.

foliata, WacG., 155; mentioned,

138.

156;

men-

mamillata, Busk, 155; men-

tioned, 138.

simplex, MacG., 155; men-

tioned, 138.

tridenticulata, Busk, 155;

mentioned, 138, 155.

Holothyride, 349, 358.

Holothyrus, Gervais, mentioned,

358,

braueri, Zhon,, mentioned,

359.

gardineri*, Warburton, 359,

fig. 359.

longipes, Z'horel/, mentioned,

359.

niger, Thon., 359.

seychellensis, 7’hon., mentioned,

359.

Homaloplia, Weg., mentioned, 232.

granulipennis, Fairmaire, 232.

Homeogryllus africanus, Savsswre,

mentioned, 291.

japonicus,

291.

Homoneura, Meijere, 313.

atra*, Lamb, 315.

pulchrifrons*, Lamb, 315.

varifrons*, Lamb, 314, fig.

314; mentioned, 348.

Homoptera glaucinans, G'uen., 8.

Hornera robusta, MacG., 156 ; men-

tioned, 138.

Haan, mentioned,

INDEX

Hosts of Dragonflies, mentioned, 446.

Humata repens, Linn. f., 415.

Hyblea puera, Cramer, 14.

xanthia, Hamps., 14.

Hydaticus, Leach, 260.

leander, Ross?, 260; mentioned,

240, 241, 244.

leander, Sharp, 260.

Hydrachnide,

of, mentioned, 446.

Hydrellia, Robineau-Desvoidy, 325.

griseola, Robineaw-Desvoidy,

mentioned, 325.

larval water-mites

varipes*, Lamb, 325.

Hydrelline, 325.

Hydrillodes, Guen., mentioned, 12.

perplexalis*, Mryer, 12; men-

tioned, 28.

repugnalis, mentioned, 12.

sp. (#), 12.

Hydrocanthus notula, Evichson, 253.

Hydroporus — thermatlis,

254.

Hydrovatus, Motschulsky, 253.

humilis, Sharp, 253; mentioned,

240, 242, 254.

sordidus,

254.

Hymenolepis spicata (Linn. fil.),

Pr. 418; mentioned, 408.

Hymenophyllacez, 409.

Germar,

Sharp, mentioned,

Hymenophyllum Blumeanum, Spren-

gel, mentioned, 410.

ciliatum, Sowerby, 410; men-

tioned, 408.

hygrometricum (Poir.), Desv.,

410; mentioned, 408.

polyanthos,

mentioned, 408.

Hymenoptera, Apoidea, by T. D. A.

Cockerell, 29-41.

Diploptera, by Geoffrey Meade-

Waldo, 43-44.

Ichneumonide, — by

Morley, 169-179.

Proctotrupoidea, by Dr J. J.

Kieffer, 45-80.

Hymenoptychis sordida, Zeller, 25 ;

410;

Sowerby, ;

Claude

larva feeds on mangroves (2hizo-

phora, Bruguiera, and Ceriops),

mentioned, 25.

Hypena masurialis, Guen., 13.

varialis, Walker, 13.

Hyphydrus, //liger, 257.

impressus, A/lug, 257; men-

tioned, 240, 242.

483

Hypochthonius, Koch, mentioned,

351.

pallidulus, C. Z. Koch, men-

tioned, 351.

Hypolamprus obscuralis, Hamps.,

20.

Hypolimnas misippus, Zinn., 18.

Hypolithus, Dejean, 247; men-

tioned, 248.

pavoninus, Gerstaecker, 248 ;

mentioned, 239, 240, 242,

248.

pulchellus, Dejean, 248 ;

tioned, 240, 242, 248.

sechellarum, Kolbe, 248; men-

tioned, 240, 241, 247, 248.

Hypolycena philippus, /abr., 20.

Hypospila bolinoides, Guen., 19.

thermesiana, Guen., 10.

Hypsa subretracta, Walker, 14.

Hypside, 14.

Hypsopygia mauritialis, Boisd., 25.

men-

Ichneumon notulatorius,

170.

Ichneumonide, Hymenoptera, by

Claude Morley, 169-179.

Idiophlebia, Griinberg, 206.

crassicosta, Speiser, mentioned,

Thunb.,

208.

pallida, Grimshaw, mentioned,

208.

Idmonea atlantica, Forbes, 156;

mentioned, 138,

milneana, d’Orb., 156; men-

tioned, 138.

radians, Lamark, 156; men-

tioned, 138.

serpens, Linn., 156; mentioned,

138.

Ilema, Moore, mentioned, 4.

contorta*, Fryer, 4.

decreta (Butler), 5.

decreta, Hamps., 5.

sp.? 4,

Ilaphanus, MacLachlan, mentioned,

251.

Ilythea, Haliday, 321.

fractivirgata*, Lamb, 321.

invenata*, Lamb, 522, fig.

322.

spilota, Curtis, mentioned, 321,

322.

Todi’s stibolepida, Butler, 16.

Toglossus, Bean, mentioned, 302.

Ischnura, Charp., mentioned, 444.

484

Tschnura senegalensis (Ramb.), 443 ;

mentioned, 435, 446.

Ischnurges expeditalis, Led., 27.

Isopoda, ‘Terrestrial, particularly

considered in Relation to the

Distribution of the Southern

Indo-Pacific Species, by the late

Dr G. Budde-Lund, 367-394.

Ixodidx, 360.

Txodoidea, 358.

Kertész, Dr K., Diptera, Stratio-

myiidee, 95-104.

Kieffer, Dr J. J., Beschreibung

neuer Sciariden von den Sey-

chellen-Inseln, 192—194.

Hymenoptera, Proctotrupoidea,

45-80.

Koptorthosoma caffrum, Cameron,

mentioned, 37.

Labeo, Haliday, 46.

saxetanus*, Kieffer, 46.

Laccophilus, Leach, 253.

addendus, Sharp, 253; men-

tioned, 239, 240, 242.

posticus, Aubé, 253 ; mentioned,

240, 242.

Lagenipora spinulosa, Hincks, 147 ;

mentioned, 138.

growing on Nellia oculata, 147.

tuberculata, MacG'., 146; men-

tioned, 138.

Sapromyzide, Ephydride, Chloro-

pide, Agromyzide, 303-348.

Lamellicornia and Adephaga, by

Hugh Scott, 215-262.

distribution of, 217.

Lamproteleia*, A%effer, 63; men-

tioned, 80.

fasciatipennis*,

mentioned, 80.

pulchripennis*, Kieffer, 53.

Landrevus, Walker, mentioned, 284.

Larve, Hexactinian, 402.

Pelagic Actiniarian, by Edith

E. Bamford, 395-406.

with Eight Mesenteries, 402.

with Twelve Mesenteries, 404,

406.

with Twenty Mesenteries, 405,

406.

Lauxania (Sapromyza)

Speiser, mentioned, 309.

Leionotus, Sauss., 43.

Kieffer, 63;

bilineata,

INDEX

Lepidoptera of Seychelles, etc., by

J. C. F. Fryer, 1-28.

Lepralia bicornis*, Zhornely, 151;

mentioned, 137, 138, 157.

cireennata, MacG., 148.

cleidostoma, Smitt, 150; men-

tioned, 138.

crassa*, Thornely, 150; men-

tioned, 137, 138, 157.

depressa, Busk, 151;

tioned, 138.

diadema, MacG., 146.

dorsiporosa, Bush, mentioned,

150.

feegeensis, Dusk, 150; men-

tioned, 138.

marginata*, Thornely,

mentioned, 137, 138, 157.

150;

men-

poisson, <Azd., men-

tioned, 138.

turrita, Smitt, 150; mentioned,

138.

Leptochilus bipinnatifidus,

412; mentioned, 408.

cuspidatus, C. Chr., mentioned,

Mett.,

412.

Leptocnemis (= Hemicnemis).

bilineata, Se/ys, 442; men-

tioned, 443, 446.

( ) eyanops, Selys, 443.

Leptogenys maxillosa, Smit/, 159.

var. vinsonella, Duzt.,

159.

Leptomysine, Vorman, 125.

Leptorhaptus, /érster, 77.

heteropus*, Aveffer, 77

insulanus*, Mieffer, 77.

Leptotrichus inquilinus, A’oe/be/,

mentioned, 380.

lentus, Dollfus, 380.

Lepyrodes capensis, Walker, 27.

Lestes ochraceus, Selys (forma),

441; mentioned, 435,

ochracea, Selys, 441.

Lestine, 441.

Leucocelis, Burm., 237.

aldabrensis, Kolbe, 237.

Leucopis, Meigen, 347.

griseola, Mallén, 347.

(Anthomyza) griseola, /allén,

347.

Liacarus piriformis*, Warburton,

353; mentioned, 350, 360.

Libellula basilaris, Pal. de Beauv.,

438.

Jlavescens, Fabr., 438.

150)

Libellula /efebvrii, Ramb., 437.

limbata, Desj., 439.

mauriciana, Ramb., 439.

semihyalina (Desj.), 438.

tetra, Ramb., 437.

trivialis, Ramb., 437.

wrighti, Selys, 436.

Libellulidee, 436.

Libelluline, 436.

Lichenopora holdsworthii,

157; mentioned, 138.

Ligia exotica, Budde-Lund, 391.

exotica, Roux, 391; mentioned,

368, 369, 370.

Ligiw, 391.

Ligiide, 389, 391.

Limnobia, Meigen, 201; mentioned,

196, 197.

iridescens*, Hdwards, 202.

202;

Busk,

magnicauda*, Hdevards,

mentioned, 214.

mahensis*, Hdwards, 201;

mentioned, 196, 202, 214.

rhizosema, Speiser, 201; men-

tioned, 196.

thomasseti*,

Edwards,

mentioned, 214.

202 ;

trentepohlii, Wied., mentioned,

211.

umbrata, J/eijere, mentioned,

202.

Limnobiidee, 208.

Limnobiine, 197.

Limnobiini, 197 ; mentioned, 195.

Limnophila, J/acg., mentioned, 195.

Limnophilini mentioned, 195.

Limonia, Meigen, 201; mentioned,

TIC ore

rhizosema, Speiser, 201.

Limosina, Macquart, 101.

acrostichalis, Becher, 101.

acutangula, Zeft., mentioned,

101.

albipennis, Rond., mentioned,

101.

angulata, Thomson, 102.

brachystoma, Stenhammer, 104.

clunipes, Mergen, 104.

curvinervis, Stenhammer, 102.

ferruginata, Stenhammer, 101;

mentioned, 101.

fontinalis, /allén, mentioned,

102. Y

halidayi, mentioned, footnote,

101.

heteroneura, Haliday, 104.

Limosina hirtula, ondani, 101;

mentioned, 102.

litoralis, Stenhammer, men-

tioned, 101.

lugubris, Haliday, mentioned,

101, 102.

munda*, Collin, 103.

var. bracata*, Collin, 103.

punctipennis, Wiedem., 102.

roralis, Rondani, 102.

sp.? 104.

thalhammeri, St#vob/, | men-

tioned, 101.

vagans, //aliday, mentioned,

101.

Lindsayo chinensis, Mett., 413.

ensifolia, Sowerby, 413.

Hornei, Baker, 414;

tioned, 408.

Warkii, Hooker, 414; mentioned,

408, 414. ry

Pervillei, Mett., 414.

Liogryllus bimaculatus, Saussure,

279.

Liphoplus validus, Bolivar, 280.

Lithosia decreta, Butler, 5.

Lithurgine, 38.

Lithurgus, Berthold, 38.

Sichel,

men-

albofimbriatus, men-

tioned, 38.

andrewsi, Cockerell, mentioned,

38.

atratiformis,

tioned, 38.

atratus, Smith, mentioned, 38.

men-

Cockerell,

dentipes, Bingham, mentioned,

38.

illudens, Saussure, mentioned,

38.

scotti*, Cockerell, 38; men-

tioned, 29.

Locusta, Linn., 271.

danica, Linn., 271.

Lodoicea sechellarum, Labi/l., men-

tioned, 226.

Lomariopsis Pervillei, Mett., 416.

Lonchea, Fallén, 303.

inequalis,

303.

longicornis*, Lamb, 304 ; men-

tioned, 548.

plumata*, Lamb, 303, fig. 364;

mentioned, 348.

splendida, Loew, 303.

vibrissifer*, Lamb, 305, fi

306; mentioned, 348.

Loew, mentioned,

gS.

INDEX

Loncheidee, by C. G. Lamb, 303—

348.

Lonchitis hirsuta, Kuhn, 418.

pubescens, Willd., 418; men-

tioned, 408.

Lonchodes, Gray, mentioned,

alluaudi, Bolivar, 294.

sechellensis, Bolivar, 295,

Lonchodini, 294.

Lonchotus, Burm., 229 ; mentioned,

220.

astovensis, Arrow, 229; men-

tioned, 216, 217, 220.

Lophogaster, J. Sars, 120; men-

tioned, 121.

294,

typicus, var. J/. Sars, 120.

Lophogastrid, 120.

Lophoteles, Loew, 95.

plumula, Loew, 95.

Loxotropa, Férster, 70.

exsul*, Aveffer, 70.

semirufa*, Aveffer, 70.

Lucanide, 221.

Lucanus striatus, Olivier, 221.

| Lycenide, 19, 329.

Lycoria, Meigen, 181.

Lymantride, 14.

Budde-Lund,

Lyprobius — lentus,

380.

Maceda mansueta, Walker, 8.

the

mentioned,

Macranillus, Sharp, from

Hawaiian Islands,

242.

Macroglossa alluaudi, Joann., 15.

Maecroglossum alluaudi (Joani.),

15.

Macroteleia, Westw., 59.

flavigena*, Kieffer, 61; men-

tioned, 59.

mahensis*, Aveffer, 60; men-

tioned, 59.

versicolor*, Aieffer, 60; men-

tioned, 59, 80.

Madasumma, /Valker, mentioned,

291.

Magulaba imparata, Walker, 12.

miestalis, Walker, 12.

Mahehia*, Badde-Lund, 375 ; men-

tioned, 369, 371.

bicornis*, Budde-Lund,

mentioned, 369, 393.

laticauda*, Budde-Lund, 376;

mentioned, 369, 393.

maculata*, Budde-Lund, 375;

376;

mentioned, 369, 393.

roe

Mahensia*, /ryer, 5; mentioned,

28.

seychellarum*, /ryer, 5; men-

tioned, 28.

Marasmia trapezalis, Guen., 26.

trebiusalis, Walker, 26.

venilialis, Walker, 26.

Marattia Sm., 422;

mentioned, 408.

Marattiacee, 422.

fraxinea,

Marginomyia, mentioned, 196.

Mausoleopsis, Lansberge, 238 ; men-

tioned, 220.

aldabrensis, Linell, 238 ; men-

tioned, 217, 220, 239.

selika, Raffray, mentioned, 220,

238, 239.

Meade-Waldo, Geoffrey, Hymenop-

tera, Diploptera, 43-44.

Megachile, Latreille, 39.

albiscopa, Sausswre, mentioned,

40,

apicalis, Spinola,

40.

disjuncta, Fabricius, 39; men-

mentioned,

tioned, 29.

mystacea, Cameron, mentioned,

39.

palmarum, erkins, mentioned,

29, 40;

Hawaiian

tioned, 40,

quinquelineata, Cockerell, men-

tioned, 40.

rutiventris, Guérin, 39; men-

introduced into

Islands, —men-

tioned, 29, 30.

seychellensis, Cameron, 40;

mentioned, 29.

race aldabrarum*, Cocke-

rell, 40; mentioned, 29.

Megachilide, 38.

Megachiline, 39.

Megastylus, Schiodte, mentioned,

Lite

Melanitis leda, Drury, 17.

Melolontha umbrasa, /abr., men-

tioned, 236.

Melolonthini, 230.

Membranipora granulitera, //incks,

143 ; mentioned, 137.

lineata, Linn., mentioned, 143.

magnilabis, Busk, 145.

normaniana, @’Orb., 142 ; men-

tioned, 137.

pedunculata, Manzoni, 143;

mentioned, 137.

486

Membranipora radicifera, /Hincks,

142.

var. intermedia, Airkp.,

142; mentioned, 137.

savartil, Aud., 143 ; mentioned,

137.

variegata, LHincks, 143; men-

tioned, 137.

Membraniporella aragoi, Aud., men-

tioned, 144.

magnifica*, Thornely, 144;

mentioned, 137, 138, 157.

Meroscinis, Metjere, 332.

eneifrons*, Lamb, 332, fig. 333.

Mesenteries, larvee with eight, 402,

406.

—— with twelve, 404, 406.

with twenty, 405, 406.

Mesocyphona, Osten-Sacken, 209.

albicapitella*, Hdwards, 209 ;

mentioned, 214.

Edwards, 209;

maculosa*,

mentioned, 214.

(Erioptera) albicapitella*, Hd-

wards, 209.

) maculosa*,

209.

Mesodryinus, Kieffer, 45.

mahensis*, Aveffer, 45; men-

tioned, 80.

Mesotrichia,

tioned, 30.

caffra, Linn., mentioned, 30,

37.

incerta, Pérez, mentioned, 30.

incerta seychellensis*, Cockerell,

36; mentioned, 29.

( Edwards,

Westwood, 36; men-

lateritia, Alwg, mentioned, 30,

olivacea, Spinola, mentioned,

30.

Metoponorthus, Budde-Lund, men-

tioned, footnote, 368, 380.

dimorphus, Dollfus, 380.

madagascariensis, Budde-Lund,

381.

pruinosus, brandt, 380; men-

tioned, 367-370.

Microchrysa, Loew, 99; mentioned,

99.

flaviventris, Wiedem., 99.

Microgalesus*, Kieffer, 74.

quadridens*, Kieffer, 74.

Microlepia speluncee (Linn), 7’.

Moore, 413; mentioned, 408.

Micropora bouchardii, Awd., 144 ;

mentioned, 138, 157.

INDEX

Micropora brevissima, Waters, 144;

mentioned, 138.

coriacea, Erper,

tioned, 138.

Microporella ciliata, Pallas, 146;

mentioned, 138.

diadema, MacG., 146; men-

tioned, 138.

men-

143 ;

hyadex, Jullien, 146; men-

tioned, 138.

magnirostris, MacG., 146;

mentioned, 138.

wnalusii, Aud., 146 ; mentioned,

138, 157.

renipuncta, MacG., 146; men-

tioned, 138.

Microthyrea, Kraatz, 238.

aldabrensis, Linell, 238.

providencie, Linell, 238.

Minettia, Desv., mentioned, 308.

Mongoma, Weste., 211; mentioned,

208.

pennipes, Osten-Sacken, 211.

Mongomioides, Brunetti, mentioned,

211.

Monogramma graminea_ (Poir.),

Schkuhr, 418; mentioned, 408.

Monomorium fossulatum, mery,

163.

subsp. sechellense, Hmery,

163.

sp. 164.

termitobium, Yorel, mentioned,

164.

Monophana, Hdwards, 200.

immaculata*, Edwards, 200;

mentioned, 214.

Morley, Claude, Hymenoptera,

Ichneumonide, 169-179.

Mosillus, Latredlle, 319.

albipennis, Loew, 319.

Mucialla (?) rufivena, Walker, 22.

.Mucronella coccinea, Abild., 153;

mentioned, 138.

delicatula, Bask,

tioned, 138.

ellerii, MacG., mentioned, 138,

153, 157.

multi - aviculariata *,

153;

men-

Thornely, 153; mentioned,

137, 138, 157.

porelliformis, Kirkp.,

mentioned, 138.

Mycosciara, Ateffer, mentioned, 191.

Mysidacea and Euphausiacea, col-

lected in the Indian Ocean during

1b3:;

1905, by W. M. Tattersall, 119-

136.

Myside, 122.

Mysine, 126.

Mysis quadrispinosa, J/lig., 127;

mentioned, 136.

Nacoleia charesalis, Walker, 26.

maculalis, Fletcher, 26.

niphealis, Walker, 26.

vulgaris, Guen., 26.

Nagara, Budde-Lund, 381.

cristata, Dollfus, 381; men-

tioned, 369.

cristata, Budde-Lund, 381.

nana, Budde-Lund, 381; men-

tioned, 367, 369.

Nellia oculata (Lagenipora spinu-

losa, Hincks), growing on, 147.

Nematobrachion, Calman, 133;

mentioned, 124.

bodpis, Calman, 133.

boépis, Holt & Tattersall, 133.

botpis, Hansen, 133.

flexipes, Ortmann, 133.

Jlexipes, Hansen, 133,

Nematodactylus

133.

flewipes, Calman, 133. :

Nematoscelis, G. O. Sars, 132;

bodpis, Calman,

mentioned, 124.

gracilis, Hansen, 133.

G. O. Sars, 132.

Hansen, 132.

microps, Tattersall, 132.

rostrata, G. O. Sars, 132.

tenella, G. O. Sars, 133.

tenella, Hansen, 133.

Nemotelinez, 95.

Neoleodes femoralis*, Warburton,

357 ; mentioned, 351, 360.

microps,

macrops,

rugosus*, Warburton, 356;

mentioned, 349, 350, 360.

striatus*, Warburton, 357;

mentioned, 351, 360.

Neostyringomyia, Alexander, 203.

Nephele hespera, Yabr., 15.

Nepheus oblongo-signatus, Muds.,

364.

ab. grinere, Sicard, 364.

redtenbacheri, J/uls., men-

tioned, 363.

seychellensis*, Sicard, 363 ;

mentioned, 362.

voeltzkowi, Weise, mentioned,

363, 364.

Nephopteryx emussitatalla, ay.

mentioned, 23.

n. sp., 23.

Nephrodium

411.

elatum, Bojer, mentioned, 411.

var. mauritianum, Baker,

411.

Hornei, Baker, 412.

molle, Baker, 411.

pleiotomum, Baker, 412.

tomentosum, Baker, 410.

Warduw, Baker, 411.

Nephrolepis _ biserrata,

413; mentioned, 408.

cordifolia, Linn., 413; men-

tioned, 408.

exaltata, var. biserrata, Baker,

413.

tuberosa, Presl., 413.

Nesohoplia*, Scott, 230 ; mentioned,

216, 231, 262.

cucullatum, Baker,

Sowerby,

senecionis*, Scott, 231; men- |

tioned, 217, 218; found on

bush groundsel, Senecio se-

chellensis, Baker, 232, 262.

Nesomicrops, Sharp, from the

Hawaiian Islands, mentioned,

242.

Nettastoma, Raf, mentioned, 301.

Neuroteleia*, Avieffer, 61;

tioned, 80.

heterocera*, Kieffer, 62.

rufa*, Kieffer, 61; mentioned,

80.

Neurothemis, Brauer (Libelluline),

characteristic Asiatic genus, men-

tioned, 446.

Noctua litura, /abr., mentioned,

footnote, 7.

Noctuids, 6.

Nodaria externalis, Guen., 12.

Nola squalida, Staud., 4.

Nomophila noctuella, Schiff, &

Denis, 27.

Notaspidine, 350, 353.

Notaspis, Herm., mentioned, 351,

354.

acutipes*, Warburton,

mentioned, 350.

clavipectinata, Michael, 354 ;

mentioned, 350, 351.

var. calva*, Worburton,

354; mentioned, 350, 351.

flagellata*, Warburton, 354;

mentioned, 350, 355.

men-

BDD ;

INDEX

Notaspis frontata*, Warburton,

355; mentioned, 350,

impolita*, Warburton,

mentioned, 350, 360.

lamellicornis*, Warburton, 354 ;

mentioned, 350, 360.

maculosa, Warburton & Pearce,

mentioned, 354.

reticulata*, Warburton, 354 ;

mentioned, 350, 360.

sculptilis, Warburton & Pearce,

mentioned, 350, 351.

simplex*, Warburton,

mentioned, 350.

splendens, C. LZ. Koch; men-

tioned, 350, 351.

Nothrinz, 350, 356,

Nothrus, Koch, mentioned, 351.

monodactylus, Michael, men-

tioned, 358.

prismaticus*, Warburton, 358;

mentioned, 351, 360.

scotti*, Warburton, 358; men-

tioned, 351, 360.

seychellensis*, Warburton, 357 ;

mentioned, 351, 358, 360.

tectorum, Michael, 357; men-

tioned, 350, 351.

— var.longipes*, Warburton,

357 ; mentioned, 351.

Notiocharis*, Haton, 427 ;

tioned, 423.

insignis*, Haton, 427; men-

354 :

BDD 5

men-

tioned, 423, 432; caught

among dead Pandanus-

leaves, mentioned, 428.

Notiphiline, 316.

Notonaulax, Becker, 338.

trisuleata*, Lumb, 338,

338.

Nymphelide, 17.

Ochropteris pallens, Sowerby, men-

tioned, 417.

Ocoloides, Howard, 54.

unicolor*, Kieffer, 54.

Ocytettix, Hancock, 264; men-

tioned, 266.

latihumerus,

tioned, 265.

Hancock,

men-

nymphula*, Bolivar, 265.

pupulus*, Bolivar, 264; men-

tioned, 292.

Odonata, by Herbert Campion,

435-446.

SECOND SERIES—ZOOLOGY, VOL. XV.

Notiphila, Fallén, mentioned, 316. |

tig. |

487

Odontacolus*,

tioned, 80.

longiceps*, Aieffer, 54; men-

tioned, 80.

Kieffer, 54; men-

Odontomachus hematodes, Linn.,

159.

Odontomyia, Meigen, 96.

Odontosoria chinensis (Linm.),

“J. Sm.,” 413; mentioned, 408.

Odynerus, Latr., 43.

cenocephalus, Cameron, 43.

chagosensis, Cameron, 43.

cylindricus, Perez, 43.

farquharensis, Cameron, 43.

seychellensis, Dalla Torre, 43 ;

mentioned, 44.

trilobus (fabr.), Lepel., 43.

var. chagosensis, Cameron,

43.

Ccanthus, Serville, 288.

indicus, Saussure, mentioned,

288.

parvulus, Sausswre, 288.

(Edebasis ovipennis, Hamps., 9.

Oleandra articulata, Sowerby, 412 ;

mentioned, 408.

Olibrininz, 589.

Olibrinus*, Budde-Lund, 389.

antennatus, Budde-Lund, 589;

mentioned, 394.

olivaceus*, Budde-Lund, 391.

pigmentatus*, Budde-Lund,

390; mentioned, 367.

Omphisa anastomosalis, Gwen., 27.

Onisci, 371.

Oniscide, 371.

Oniscinze, 377.

Oniscoidee, mentioned, 389.

Onychocella velata, Hincks, 143 ;

mentioned, 138.

Ophideres materna, Linn., 11.

Ophioglossacez, 422.

Ophioglossum palmatum, Linn.,

422; mentioned, 408.

pendulum, Linn., 422;

tioned, 408.

Ophion anceps, Tosquinet, 173.

rufus, Brullé, mentioned, 173.

men-

rufus, Kriechb., mentioned,

173.

rufus, Tosquinet (= antarkarus,

Sauss.), mentioned, 173.

Ophion (Enicospilus) — leionotus,

Tosquinet, 173.

(Henicospilus) longescutellatus,

Kriechb., 173.

will@Rary

—

Wass:

488

Ophionea, A7ug, 245; mentioned,

241.

sp., 245; mentioned, 241.

Ophionine, 173.

Ophiuche conscitalis, Walker, 14.

Ophiusa algira, Linn., 9.

angularis, Boisd., 9.

catella, Gwen., mentioned, 9.

melicerta, Drury, 9.

mercatoria, Fabr., 9; obtained

at the flower of Ceriops

candolleana, Arn., 9.

tirhaca, Cramer, 9.

violaceofascia,

tioned, 9.

Ops, Becker, 329.

Saalm., *men-

glaberrima*, Lamb, 329, fig. |

330; mentioned, 348.

Orbitata alata, Herm., mentioned,

349-352.

var. major, Pearce,

tioned, 351.

brevis*, Warburton, 352;

tioned, 350, 360.

men-

cuspidata, Michael, 351; men-

tioned, 350.

elongata*, Warburton, 352;

mentioned, 350, 360.

gracilis, mentioned, 353.

lata*, Warburton, 353; men-

tioned, 350, 360.

longissima*, Warburton, 352;

mentioned, 350, 360.

mammillata*, Warburton, 352 ;

mentioned, 350, 360.

seychellensis*, Warburton, 353;

mentioned, 350, 360.

truncata*, Warburton,

mentioned, 360.

Orchesia micans, Panz., mentioned,

M9:

Oribata alata, Herm., mentioned,

349,

Oribatide, 349, 350.

Oribatine, 352.

Orimarga, Osten-Sacken, 204.

fryeri*, Hdwards, 204; men-

tioned, 214.

scotti*, Hdwards, 204; men-

tioned, 214.

Oriscelio*, Kieffer, 58 ; mentioned,

80.

seychellensis*,

mentioned, 80.

Ormosia, Rondani, 208.

58 ;

Kieffer,

var. dentata*, Lamb, 331. |

INDEX

Ormosia perpusilla*, Zdwards, 208 ;

mentioned, 214,

| Ornebius, Guérin, 280.

elegantulus*, Bolivar,

mentioned, 292.

flavipalpis, Kirby, mentioned,

280 ;

280.

nigripalpis, G'uérin, mentioned,

281.

novare, Saussure, mentioned,

280.

succineus*, Bolivar, 281.

syrticus*, Bolivar, 280 ;

tioned, 281.

men-

validus, Bolivar, 280; men-

tioned, 281.

xanthopterus, Gwérin, men-

tioned, 281.

Orneodidz, mentioned, 1.

Orphnini, 228.

| Orthetrum stemmale capense, men-

tioned, 436.

lemur, mentioned, 436.

stemmale, Ris, mentioned,

436.

Wright's (Selys),

mentioned, 436, 446.

wrightii, Ris, 436.

436;

| Orthocentrus, Gravenh., 172.

9h9. |

3D2 ;

insularis, Ashmead, mentioned,

172.

protuberans, Holmgr., 172.

var. deletus*,

Moriey,

172.

Orthoptera :

Acrydiide, Phasgo-

nuride, Gryllide, par Dr Ignacio |

Bolivar, 263-292.

—— Phasmide of the Seychelles,

by Dr Ignacio Bolivar and

Chas. Ferriére, 293-300.

Orthostomus, ner., mentioned,

302.

Ortmannia, Rathb., mentioned, 451,

457, 458, 459; evolution of,

mentioned, 459-469.

alluaudi, Bouvier, mentioned,

460.

edwardsi, Bouvier, mentioned,

451, 459, footnote 459, 472. |

henshawi, Rathb., mentioned,

459, 460.

Oruza rupestre*, /ryer, 10; men-

tioned, 28.

Oryctes, I/liger, 229,

monoceros, Olivier, 229; men-

tioned, 217, 218.

Oryctes monoceros, Alluaud, 229.

Oscinine, 331.

Oscinis, Latreille, 339.

acuticornis*, Lamb, 340, fig.

540; mentioned, 348.

atricornis, Zetterstedt,

tioned, 340, 341.

dimorpha, Osten-Sacken, men-

tioned, 339.

dissimilicornis*,

fig. 339.

ephippium, Zetterstedt,

tioned, 336.

halterata*, Lamb, 343; men-

tioned, 348.

longipennis*, Lamb, 342, fig.

342; mentioned, 343, 348.

oculata*, Lamb, 340; men-

tioned, 340, fig. 341, 343,

348.

signata, Wollaston, 337.

varicornis*, Lamb, 343 ; men-

tioned, 348.

Osmiine, 39.

men-

Lamb, 339,

men-

Ovactis, v. Beneden,

tioned, 399.

brasiliensis, v. Beneden, men-

tioned, 400.

indiana*, Bamford, 401; men-

tioned, 406.

superficialis*, Bamford, 400;

mentioned, 406.

Oxycetonia, Arrow, 236.

luctuosa, Gory & Percheron,

mentioned, 237.

versicolor, /abr., 236; men-

tioned, 217, 218, 220, 242.

var. cruenta, Pall., men-

tioned, 237.

var.

400; men-

variegata,

mentioned, 237.

versicolor, Arrow, 236.

Oxymepoton, Slecker, mentioned,

302.

Oxyomus, Castelnau, 224; men-

tioned, 226.

cameratus, Schmidt, mentioned,

225.

palmarum*, Scott, 224; men-

tioned, 217, 218, 225; found

on different species of palms,

226, 260, 262.

Oxythyrea, Mailsant, 237; men-

tioned, 220.

aldabrensis, Linel/, 237; men-

tioned, 217, 220.

Fabr.,

Oxythyrea clouei, Llanchard, men-

tioned, 239.

marginalis, Swartz, mentioned,

220.

selika, Raffray, mentioned,

238. |

Ozolla inexcisata*, Fryer, 16 ; men-

tioned, 28.

Pachycerina, Macquart, 307.

javana, Macquart, mentioned,

307.

obscuripennis*, Lamb, 308.

seychellensis*, Lamb, 307;

mentioned, 348.

Pachygastrine, 95.

Pachyrrhina, Macquart, mentioned,

195,

Pachyzancla mahensis, Fletcher, 27.

minoralis, Warren, 28.

pheopteralis, Gwen., 27.

Pagana, Budde-Lund, 380.

dimorpha, Budde-Lund, 380 ;

mentioned, 369, 370.

fissifrons, Budde-Lund, from

Mauritius, mentioned, 370,

380.

maculosa, Budde-Lund, from

Mauritius, mentioned, 370,

380.

Pagyda traduealis, Zeller, 26.

Palpopleura, amb., mentioned,

446,

Palythoa caribea, Duch. & Mich.,

mentioned, 395.

mamillosa, Hillis dé: Tol., men-

tioned, 395.

Rumpf. ex Linn.

259.

Pandanus, ifs

mentioned, 225,

Hornei, Balf. #:, mentioned,

259, 260, 428; Pseudo-

ficalbia pandani*, Theob.,

caught flying amongst dead

leaves of, mentioned, 91, 92.

sechellarum, Balf. 7., mentioned,

225, footnote 259.

Panimerus*, Zaton, 425; mentioned,

423,

hirtus, Zinn., mentioned, 425,

426.

nadorensis, Haton, mentioned,

425.

notabilis, Haton, mentioned,

426.

scotti*, Haton, 426; mentioned,

423, 432.

INDEX

Paniscus perforator, Smith, 173.

Panoplites, Theob., 89.

Fabr.,

Pantala flavescens,

5 Se |

mentioned, 435, from Aldabra ;

mentioned, 435, 446.

Pantoclis, Férster, 75.

insulanus*, Aveffer, 75 ;

tioned, 75.

scotti*, Kieffer, 76; mentioned,

75.

seychellensis*, Kieffer, 75.

Papilio disparilis, Boisd., var. nana,

Oberth., 18.

Papilionide, 18.

Parabeus*, Kieffer, 53 ; mentioned,

80.

ruficornis*, Kieffer, 53; men-

tioned, 80.

Paragreenia, Cockerell, mentioned,

af.

Paragryllus,

285.

Paralimna, Loew, 317.

men-

Guérin, mentioned,

lineata, Meijere, 317.

Paranteris*, Kieffer, 65.

densiclava*, Kieffer, 67 ; men-

tioned, 65.

flaviclava*, Kieffer, 67; men-

tioned, 65.

nigraticeps*, Kieffer, men-

tioned, 65.

nigriclava*, Kieffer, 66; men- |

tioned, 65, 67.

nitidiceps*, Kieffer, 67 ; men-

tioned, 65.

striatigena*, Kieffer, 67 ; men-

tioned, 65.

Paraphiloscia, Stebhing, mentioned,

footnote, 372.

fragilis, Budde-Lund, men-

tioned, 372.

gracilis, Budde-Lund, men-

tioned, 372.

inflexa, Budde-Lund, men-

tioned, 372.

stenosoma, Stebbing, from New

Britain, mentioned, 372.

Parasierola, Cameron, 47.

rostrata*, Kieffer, 47.

Parastasia, Westw., 235;

tioned, 219.

basalis, Cand., mentioned, 218, |

219.

coquereli, Fairmaire, 235;

mentioned, 217, 218, 219,

242.

438 ; |

489

| Paratettix, Bolivar, 266.

chagosensis*, Bolivar, 266;

mentioned, 292.

meridionalis, Ramb., mentioned,

| 266.

| seaber, Thunberg, 26

tioned, 263.

‘

; men-

voeltzkovviana, Sauss., men-

tioned, 266.

| Parathysanopoda foliifera, Mllig.,

129.

Paratrimorus, Kieffer, 64; men-

tioned, 80.

atriceps*, Kieffer, 64; fig. 2,

64; mentioned, 80.

Paratropesa, Schiner, mentioned,

208.

Parioglossus*, Regan, 302.

teniatus*, Regan, 302.

Parkeriacez, 421.

Parnara borbonica, Boisd., 20.

gemella, Mabille, 20.

morella, Joann., 20.

Pareecanthus, Sawsswre, mentioned,

| 291.

Parydra, Stenhammar, 326.

pusilla, J/eigen, mentioned,

326.

tuberculifera*, Lamb, 326, fig.

327 ; mentioned, 348.

Pelagic Actiniarian Larvie, by Edith

E. Bamford, 395-406.

| Pelina, Haliday, mentioned, 319.

| Pelleea Barkly, Baker, 417.

Doniana, Hooker, 416; men-

tioned, 408.

hastata, Link, 416.

viridis (Forst.), Prantl, 416 ;

mentioned, 408.

Pelops, Koch, mentioned, 350.

Pentacentrodes, Bolivar, mentioned,

284.

Pentacentrus, Saussure, 282; men-

tioned, 283, 284.

nigrifrons*, Bolivar, 282;

mentioned, 292.

pulchellus, Sausswre, —men-

tioned, 283.

| tenellus, Aarsch, mentioned,

| 284,

Pentagonica, Schmidt-Gobel, 247 ;

mentioned, 241.

mahena, Kolbe, 247 ; mentioned,

239, 240, 241.

Penthoptera, Schiner, mentioned,

195, 213.

62—2

490

Pecedes, Karsch, 267.

cruciformis, Bolivar, 267; men-

tioned, 292.

Pericoma, Hal. MS., Walker, men-

tioned, 423, 424.

formosa, Meunier, mentioned,

423,

Perigea capensis, Gwen., 7.

Perissosoma, Waterh., 233.

wnescens, Waterh., 233; men- |

tioned, 217, 218, 234, 235.

grande*, Scott, 234; mentioned,

217, 218; 235.

tenuitarse, Fairmaire, 233;

mentioned, 234, 235.

Petrodava leucicolor, Butler, 16.

Pheocrous, Castelnau, 228.

insularis, Zinell, 228; men-

tioned, 217, 220.

Pheogryllus*, Bolivar, 285; men-

tioned, 263, 292.

fuseus*, Bolivar, 286; men-

tioned, 292.

Phalangacris, Bolivar, 288; men-

tioned, 263, 286.

alluaudi, Bolivar, 288.

Phalangopsis, Bolivar, mentioned,

286.

Phaneroptera, Serville, 274.

nana, ieber, 274; mentioned,

263.

Pharoscymnus, Zedel, mentioned,

365.

eburifer, Sicard, mentioned,

364.

Pharus, Awct., mentioned, 365.

Phasgonuride, par Dr Ignacio

Bolivar, 263-292.

Phasmide of the Seychelles, by

Dr Ignacio Bolivar, and Chas.

Ferriére, 293-300,

Pheidole punctulata, Mayr, 164.

Pheropsophus, Solier, 246.

humeralis, Chaudoir, var.? 246;

mentioned, 240, 242.

omostigma, Chaudoir, 246.

Phibalosomini, 299.

Philenora subfusea*, Fryer, 5; men-

tioned, 28.

Philonomon luminans(Karsch), 437 ;

mentioned, 435.

luminans, Ris, 437.

Philosepedon, 429 ;

tioned, 424.

Eaton, men-

humeralis, Hoffman MS., Meig.,

429; mentioned, 423.

INDEX

| Philosepedon triungulatus*, Haton, |

| 429; mentioned, 423.

Philoscia alba, Dollfus, mentioned,

386.

angusticauda, Budde-Lund,

mentioned, 386.

annulicornis, Budde-Lund, 389.

annulicornis, Dollfus, 389.

ceca, Budde-Lund, mentioned,

386.

cinctella, Dollfus, mentioned, |

386.

comta, Budde-Lund, men-

tioned, 386.

gracilis, Borradaile, mentioned,

Ba.

gracilis, Badde-Lund = Seta-

| phora, sp. mentioned, 370.

| incurva, Budde-Lund,

tioned, 386.

lateralis, mentioned, footnote

men-

368.

laticeps, Bagnall, mentioned,

386.

lifuensis, Stebbing, mentioned,

| 386.

lubricata, Budde-Lund, 386.

mina, Dollfus, 372.

368, 373.

pallida, Dollfus, mentioned,

386.

sp., mentioned, 370.

suarezi, Dollfus, 388; men-

tioned, 386.

sundaica, Dollfus, mentioned,

386.

truncata, Dollfus, mentioned,

386.

tioned, 386.

variegata, Dollfus, mentioned,

386.

weberi,

386.

Philygria, Stenhammar, 325.

picta, Fallén, mentioned, 326.

sp. ? 326.

striata*, Lamb, 326.

Phisis, Stal, 277.

Dollfus, mentioned,

dumosa, Karsch, mentioned,

| 277.

pectinatus, Guérin, mentioned,

277.

spinifera, Butler, mentioned,

277.

truncatella, Budde-Lund, men- |

mina, Budde-Lund, mentioned, |

Phisis visenda*, Bolivar, 277.

Phlyctenodes massalis, Walker, 28.

Phlyctenolotis*, Sicard, 364; men-

tioned, 366.

scotti*, Sicard, 365.

Phora chlorogastra, Becker, men-

tioned, 107.

Phoride from Seychelles, by James

E. Collin, 105-118.

Phthiracarine, 351.

Phthiracarus, Perty, mentioned, 351.

arduus, CU. Z. Koch, mentioned,

351.

Phycita (sub-genus?) pectinicor-

nella*, Fryer, 23.

Phylactella columnaris, Kirkp., 153;

mentioned, 138.

galeata*, T'hornely, 153; men-

tioned, 138, 157.

Phyllini, 294.

Phyllium, Z/iiger, 294; mentioned,

293.

bioculatum, Gray, 294; men-

tioned, 293.

celebicum, de aan, mentioned,

294,

gelonus, Gray, mentioned, 294.

siccifolium, Linn., from

Mauritius, mentioned, 294.

| Picride, 18,

Pimpla citrina, Holmgr., mentioned,

ikg/ile

continua, Brullé, 170.

macula, Brullé, mentioned, 171.

var. vittata, Brullé, men-

tioned, 171.

variegata, Brullé, 170.

Pimpline, 170.

Pionea aureolalis, Led., 28.

ferrugalis, Hiibner, 28.

Plagiolepis alluaudi, Hmery, 165.

madecassa, Forel, 165.

Plangia, Stal, 274.

graminea, Serv., mentioned,

275.

guttatipennis, Marsch, men- |

tioned, 275.

laminifera, Harsch, mentioned,

275.

nebulosa, Aarsch, mentioned,

275.

ovalifolia*, Bolivar, 274; men-

tioned, 292.

segonoides, Butler, mentioned,

275.

venata, Griff, mentioned, 275.

Plastophora, Brues, mentioned, 109.

formicarum, Verral/, men-

tioned, 109.

Platyarthrus simoni, Dol/fus, men-

tioned, 382.

Platycerium, Desvaua, mentioned,

421.

alvicorne, Baker, 421.

bifurcatum (Cav.), C.

421; mentioned, 408.

Platychelus, mentioned,

231.

Platychirus, St Fargeau & Serville,

mentioned, 109.

Platycraniz, 299.

Platygaster, Latreille, 79.

mahensis*, Kieffer, 79.

seychellensis*, Aveffer, 79.

Platygasteride, 45, 78.

Platymetopus interpunctatus, De-

jean, 249.

Platythyrea wroughtoni, Morel, 159.

Plectiscus, Gravenh., 178.

oceanicus*, Morley, 178.

Plusia chalcytes, sper, 9.

Chr.,

Burm.,

limbirena, Gwen., 9.

signata, Fabr., 9.

Polistes, Zatr., 44.

hebreus, Cameron (nec Fabr.),

44,

macensis, Mabr., 44.

Pollaplecium gilbertensis, Maple-

stone, 141; mentioned, 137.

Polyamma Kriechb.,

170.

Polybotrya tenwifolia, Kuhn, 416,

Polyommatus beticus, Linn., 19.

Polypodiacex, 410.

Polypodium adnascens, Baker, 419.

continwum,

albobrunneum, Saker, 419;

mentioned, 408.

asplenifolium, var. minor,

Mett., 419.

cultratum, Willd., var. elasti-

cum, Bory, 419 ; mentioned,

408.

cultratum, Baker, 419.

elasticum, Bory, 419.

irioides, Zam., 419.

Pervillei, AMett., 418;

tioned, 408.

phymatodes, Linn., 419; men-

tioned, 408.

punctatum (Linn.), Sowerby,

419; mentioned, 408.

sechellarum, part., Baker, 419,

men-

INDEX

Polypodium serrulatum (Sowerby),

Mett., 419; mentioned, 408.

spissus, Bory, 419.

Polysphincta, Gravenh., 172.

bohemani, Holmgr., 172.

var. tropicus*, Morley,

172.

Polystichum adiantiforme, Yorst.,

412; mentioned, 408,

Polyzoa, Marine, of the Indian

Ocean, from H.M.S. “Sealark,”

by Laura Roscoe Thornely,

137-157.

Ponera ragusai, Hmery, 159.

Porcellio, Latreille, 378.

cristatus, Dollfus, 381.

maldivensis, Borradaile, men-

tioned, 370.

pruimosus, Brandt, 380.

(Tura) albipennis*, Budde-

Lund, 378.

) angusta*, Budde-Lund,

(

378.

(——) laticauda*, Budde-

Lund, 378.

(——) testacea*, Budde-

Lund, 378.

Porcellionides, iers, mentioned,

footnote, 368.

Porella concinna, var. gracilis,

Hincks, 151; mentioned, 138.

nitidissima, Hincks, 151 ; men-

tioned, 138.

Porina subsulecata, Smitt, 154.

Porthesia pectinata*, Fryer, 14;

mentioned, 28.

Precis clelia, Cramer, 18.

orithyia, var. madagascarensis

(Guen.), 18.

rhadama, Boisd., 18.

Prenolepis —_ bourbonica, —- orel,

165.

longicornis, Lato, 165.

mixta, ‘Morel, 165.

steinheili, /orel, 165,

Pristocera, Alug, 47.

crucifera*, Aveffer, 48; men-

tioned, 47, 49.

pallidimanus*, Kieffer, 48;

mentioned, 47.

remota*, Kieffer, 48; men-

tioned, 47.

Pristomeridia, Ashmead, 176.

marginicollis, Cameron, men-

tioned, 176.

ruficaput*, Morley, 176.

491

Pristomerus, Holmgr., mentioned,

176.

Proctotrupoidea, by Dr J. J. Kieffer,

45-80,

Procytettix*, Bolivar, 265; men-

tioned, 263, 292.

fusiformis*, Bolivar, 266; men-

tioned, 292.

Prodenia littoralis, Boisd., 7.

Progonia patronalis, Walker, 12.

Protetia, Burm., 237.

aurichalcea, Fabr., 237;

tioned, 217, 220, 242.

aurichalcea, Arrow, 237.

maculata, Aolbe, 237.

Psammodius

226.

Psectrosciara*, Kieffer, 192 ;

tioned, 192.

mahensis*, Kieffer, 193; men-

tioned, 192, 194.

Pseudeuphausia, Hansen, 132.

latifrons, G. O. Sars, 132.

latifrons, Hansen, 132.

Pseudoficalbia*, Zheob., 89; men-

tioned, 81, 88.

nepenthes*, Z'heob., 92, fig. 11;

larva of mentioned, 93, 94.

Theob.,

men-

laticeps, Fairmaire,

men-

nigripes,

92.

pandani*, Zheob., 90, fig. 8;

mentioned, 89, fig. 9, 90, fig.

10, 91; caught flying amongst

dead

hornei, Balf. f., mentioned,

91, 94.

Pseudomacromia, Kirby, mentioned,

437.

luctifera (Selys), 437 ;

tioned, 446.

Pseudophiloscia, Budde-Lund, 372;

mentioned, 368, 369, 371.

angustissima*, Budde-Lund,

373; mentioned, 369, 393.

brevicornis*, Budde-Lund, 374;

mentioned, 393.

mentioned,

leaves of Pandanus

men-

fragilis, Budde-Lund, from New

Zealand, mentioned, 372.

gracilis, Budde-Lund, from

Upolo Island, mentioned,

372.

inflexa, Budde-Lund, from

Chili, mentioned, 372,

lateralis*, Budde-Lund, 372;

mentioned, 369, 393.

Psilopa, Fallén, 322.

62—3

492

Psilopa compta, Meigen, mentioned,

322.

longicornis*, Lamb, 323, fig.

323; mentioned, 348.

nitidissima*, Lamb, 322, fig.

322.

Psiloteleia, Kieffer, 57.

atra*, Kieffer, 57.

Psychoda, Linn., et auct., 428;

mentioned, 424.

albipennis, Zetterstedt,

tioned, 428, 429, 432.

alternata, Say, 428; mentioned,

423, 428.

eocenica, Meunier, mentioned,

424,

oxyptera,

424,

phalznoides, Zinn., mentioned,

428.

seapunctata, Curtis, 428.

men-

Loew, mentioned,

solitaria*, Haton, 429; men-

tioned, 423, 429, 432.

Psychodide, by Rev. A. E. Eaton,

423-432.

Pteridella viridis, Mett., 416.

Pteris, Linn., habit of, mentioned,

417.

atrovirens, Willd., 417; men-

tioned, 408.

Barklyze (Hook.), Mett., 417 ;

mentioned, +08.

biaurita, Linn.,

tioned, 408.

subsp. quadriaurita, Retz,

417; mentioned, 408.

dichotoma, Baker, 417.

var.

417; men-

elongata, Mett.,

417.

incisa, Baker, 417.

marginata, Bory, 417.

nemoralis, Willd., 417.

quadriaurita, subsp., Zetz, 417;

mentioned, 408.

tripartita, Sowerby, 417; men-

tioned, 408.

Pterophoride, mentioned, 1.

Pullus arrowi*, Sicard, 361.

plutonus, Muls., 361.

Pycnocrepis, Enderlein, 206.

annulipes, Hnderlein, 207.

Pyralile, 22.

Pyralis farinalis, Linn., 25.

manihotalis, Gwen., 25; men-

tioned, 3.

Pyrameis cardui, Linn., 17.

INDEX

Pyrausta incoloralis, Guen., 28.

mahensis, Fletcher, 28.

Racilia, Sta, mentioned, 272.

Reedomyia, Ludlow, 83 ; mentioned,

81, 84.

neobiannulata, Zheob., men-

tioned, 84.

seychellensis*, Kieffer, 83;

mentioned, 94.

var. similis, Zheob., 83,

fig. 2B; mentioned, 84.

Regan, C. Tate, New Fishes from

Aldabra and Assumption, col-

lected by Mr J. C. F. Fryer,

301-302.

Remigia repanda, Habr., 9.

undata, Fabr., 8.

Retepora denticulata, Bush, 147;

mentioned, 138.

monilifera, MacG., var. nov.,

147; mentioned, 137, 138.

porcellana, MacG., 147; men-

tioned, 138.

Rhamphidiini, 195, 203.

Rhamphidine, mentioned, 208.

Rhipicephalus sanguineus, Latr.,

mentioned, 360.

Rhipidia afra, Bergroth, mentioned,

199.

pulchra, Meijere, 199.

Rhodogastria aldabrensis*, Fletcher,

6; mentioned, 28.

astreas, var. madagascarensis,

Bois, mentioned, 6.

Rhodoneura aldabrana*, Fryer, 21;

mentioned, 28.

apicale*, /ryer, 21; mentioned,

28.

tibiale*, Fryer, 20.

Rhopalocampta arbogaster, Guen.,

20.

Rhopalopria*, Kieffer, 71; men-

tioned, 80.

vulgaris*, Aveffer, 71; men-

tioned, 80.

ihynchopora bispinosa, Hincks,

149.

Rhynchotettix*, Bolivar, 271;

mentioned, 263, 292.

gardineri*, Bolivar, 272; men-

tioned, 292.

Rhyncozoon _ bispinosa,

149; mentioned, 138.

incisor, Zhornely, 149; men-

tioned, 138.

Johnston,

Rhyothemis,

445,

semihyalina (Desj.), 438 ; men-

tioned, 435, 446.

Rhypholophus, Kolenati, 208.

Rhyssemus, dMJulsant, 228.

goudoti, Harold, 228; men-

tioned, 216, 217, 218.

ritseme, Clouét, 228;

tioned, 217, 218, 220.

Rivula_ dimorpha*,

Hagen, mentioned,

men-

Fryer, 12;

mentioned, 28.

Rodolia chermensina, Muls., 361.

ab. dionysia, Sicard, 361.

Roena, Cameron, mentioned, 59.

Rutelini, 235.

Salarias aldabrensis*, Regan, 302.

Salicornaria tenuirostris, Busk,

145; mentioned, 138.

Salmania, Walker, mentioned, 284.

Salticus, Jolie, mentioned, 279.

Sapromyza, Fallén, 308.

bilineata, Speiser, mentioned,

309.

crassicaput*, Lamb, 312 ; men-

tioned, 348.

funebricornis*, Lamb, 310,

fig. 310; mentioned, 311,

348.

mahensis*, Lamb, 311, fig.

310; mentioned, 348.

nudiuscula*, Lamb, 311; men-

tioned, 348.

perpunctata*, Lamb, 312, fig.

313; mentioned, 348.

striata*, Lamb, 308, fig. 309 ;

mentioned, 348.

Sapromyzide, by C. G. Lamb,

303-348.

Saprosites, Ledtenb.,

tioned, 219.

laticeps, Fairmaire, 226 ; men-

tioned, 217, 218, 227.

laticeps, Alluaud, 226.

pygmeus, Harold, 227; men-

tioned, 217, 218.

Sarginee, 98.

Sargus, Fabr., 98.

flaviventris, Wiedem., 99.

seychellensis*, Kertész, 98.

(Chrysonotus) hovas, Bigot,

mentioned, 99.

Scarabeide, 223.

Scarabeus lividus, Olivier, 223.

monoceros, Olivier, 229.

226; men-

Scardamia metallaria, mentioned, 15.

(2?) percitraria*, 15;

mentioned, 28.

Scatella, Robineau-Desvoidy, 328.

septemfenestrata*, Lamb, 328,

fig. 328,

Seatella stagnalis,

tioned, 328.

Scelio, mentioned, 59.

Scelionide, 45. <A. Telonomine,

Fryer,

Fallén, men-

51. B. Beine, 52. C. Scelio-

nine, 56.

Scelionine, 56.

Schistocerca peregrina, Olivier,

mentioned, 273.

Schizea digitata (Linn.), Sowerby,

422; mentioned, 408.

digitata,var.intermedia(Mett.),

Baker, 422.

Schizeacer, 422.

Schizoloma ensifolium (Sowerby),

J. Sm., 413; mentioned, 408.

Schizonyx luctifera, Karsch, 437.

Schizoporella armata, Hincks, 148 ;

mentioned, 138.

biaperta, Michelin, 148; men-

tioned, 138.

cecilii, Aud., 147; mentioned,

138.

circinnata, MacG., 148; men-

tioned, 138.

dutertrei, Aud.,

tioned, 138.

var. pes-anseris, Smite,

149; mentioned, 138.

hyndmani, Johnston,

mentioned, 138.

lata, MacG'., 148; mentioned,

138.

nivea, Busk, 148; mentioned,

- 138.

scintillans, //incks, mentioned,

148.

spongites, Smitt, 148; men-

tioned, 138.

subsinuata, Hincks, 149 ; men-

tioned, 138.

triangula, Hincks, 147; men-

tioned, 138, 149.

viridis, Zhornely, 148; men-

tioned, 138.

Schizopria*, Aveffer, 68 ; mentioned,

70.

fallax*, Kieffer, 68.

flaviclava*, Kieffer, 69; men-

tioned, 68.

149; men-

149 ;

INDEX

Sciara, eigen (= Lycosia, Meigen),

181; mentioned, 190, 191,

193.

albicoxa*, Hnderlein, 183;

mentioned, 194.

biformata*, Hnderlein, 185;

mentioned, 194.

divergens*, nderlein, 187;

mentioned, 194.

leucocera*, Kieffer, 193; men-

tioned, 188, 194.

mahensis*, Aveffer, 193 ; men-

tioned, 188, 194.

nigriceps *, Hnderlein,

mentioned, 194.

rimiscutellata*, Hnderlein, 181 ;

mentioned, 194.

seychellensis*, Enderlein, 182;

mentioned, 194.

Sciaride, Diptera, von Dr Giinther

Enderlein, 181-194.

Sciariden von den Seychellen-

Inseln, von J. J. Kieffer, 192-

194.

Scleroderma, A7wg, 50.

seychellensis*, Aveffer, 50.

Scleropterus erythrocephalus, Wad-

ker, mentioned, 288.

186 ;

Scolodipnus, Schawm, mentioned,

251.

Scott, Hugh, Coleoptera, Lamel-

licornia and Adephaga, 215-

262.

Scottia*, Bolivar, 278 ; mentioned,

263.

chagosensis*, Bolivar, 279;

mentioned, 292.

salticiformis*, Bolivar, 279;

mentioned, 292,

Scrupocellaria cervicornis, Bush,

mentioned, 140.

frontis, Airkp., 140; men-

tioned, 137.

macandrei, Busk, 140; men-

tioned, 137.

obtecta, Haswell, 139 ;

tioned, 137, 140.

pilosa, Busk, 139 ; mentioned,

men-

137.

scrupea, Bush, var. dongolensis,

Waters, 139; mentioned,

137.

Scymnus constrictus, Muls., 362.

ab. intercisus, Sicard,

362.

erytogonoides*, Sicard, 362.

493

Scymnus crytogonoides*, ab, lunu-

latus*, Sicard, 363; found on

flowers of Tournefortia argentea,

Linn. f., mentioned, 362.

Seythropochroa, Znderlein,

mentioned, 181.

latefurcata, Hnderlein, 189.

Senecio sechellensis, Baker, beetle

Nesohoplia senecionis, Scott, found

on, 232.

Serica granulipennis, Alluaud, 232.

Setaphora, Budde-Lund, 386; men-

tioned, 369, 372.

ovata*, Budde-Lund,

mentioned, 369, 394.

pallidemaculata*, Budde-Lund,

387 ; mentioned, 369, 394.

pilosa*, Budde-Lund, 388 ;

mentioned, 367, 394.

sp., mentioned, 370.

suarezi, Dollfus, 388; men-

tioned, 368.

Seychelles, Caridines, par Eugéne

L. Bouvier, 447-472.

189 ;

386 ;

| Seychelles and the Aldabra Group,

Ferns of the, by Carl Christen-

sen, 407-422.

Seychellesia*, Bolivar, 286; men-

tioned, 263, 292.

longicercata*, Bolivar, 287.

nitidula*, Bolivar, 286; men-

tioned, 292.

patellifera*, Bolivar,

mentioned, 292.

Sicard, Dr, Coleoptera, Coccinel-

lide, 361-366.

minutula,

287 ;

Siculodes

mentioned, 22.

Saalmiiller,

Sima rufonigra, Jerdon, 164.

Simplicia inareolalis*, Fryer, 12;

mentioned, 28.

inflexalis, Gwen., 12.

Siopelus, Murray, mentioned, 247,

248.

calabaricus,

tioned, 247.

ferreus, Bates, mentioned, 247.

sechellarum, Kolbe, 248.

Murray, men-

venustulus, J/urray, men-

tioned, 247.

Siphunculina, Rendani, 337.

signata, Wollaston, 337.

(Osecinis) signata, Wollaston,

337.

Siriella, Dana, 122; mentioned,

124.

494

Siriella quiremis, Hansen, 122;

mentioned, 123.

gracilis, Dana, 122; mentioned,

120.

gracilis, Sars, 122.

gracilis, Hansen, 122.

paulsoni, Aossmann,

tioned, 123.

thompsoni, /.

122; mentioned, 120.

thompsoni, Hansen, 122.

men-

Sirielline, 122.

Smittia affinis, Hincks, 151; men-

tioned, 138.

glomerata*, Zhornely, 152;

mentioned, 137, 138, 157.

landsborovii, Johnston, 151;

mentioned, 138,

marmorea, Hincks, 151; men-

tioned, 138.

murarmata, Kirkp., 153; men-

tioned, 138, 157.

nitida, Verril/, 152; mentioned,

138.

ornata*, Thornely, 152; men-

tioned, 137, 138, 157.

signata, Waters, 151;

tioned, 138.

trispinosa, Johnston, 152 ; men-

tioned, 138, 153.

tubula, Airkp., 151; mentioned,

138.

Sodoptera abyssinia, Guen., 7.

mauritia, oisd., 7.

men-

Solenopsis seychellensis, /ore/, 164 ;

mentioned, 159.

Sphecodes, Latreille, 30.

scotti*, Cockerell, 30;

tioned, 29, 31.

Sphecodine, 30.

Spherillo, Budde-Lund, 371; men-

tioned, 369, 371.

collaris, Budde-Lund,

mentioned, 370.

maculosus, Budde-Lund, 372 ;

mentioned, 369.

parvus, Budde-Lund, 371; men-

tioned, 367-370.

peltatus, Budde-Lund, 372;

mentioned, 369.

purpurascens*, Budde-Lund,

3715; mentioned, 372.

testudinalis, Budde-Lund, 372;

mentioned, 369.

Spherillonine, 371.

Sphingide, 15.

men-

372;

Milne-Edw., |

INDEX

Stagnopimpla hyalina, Sawss., men-

tioned, 171.

Steganoporella magnilabris, Bush,

145; mentioned, 138.

rozeri, Hincks, 145.

Stegomyia, Zheob., 81.

fasciata, Fabr., 81 ; mentioned,

83.

Jasciata persistans, Banks, 82.

pseudoscutellaris, Z’eob., men-

tioned, 83.

scutellaris, Walker, 82; men-

tioned, 81, 83.

Stenochlena Pervillei, Mett., 416 ; |

mentioned, 408.

tenuifolia (Desv.), 2. Moore,

416; mentioned, 408.

Stenolophus, Dejean, 249;

tioned, 252.

men-

fulvipes, Hrichson, 249: men- |

tioned, 240, 241, 250.

Stevensonia, /. Dune., mentioned,

225.

grandifolia, J. Dune, men-

tioned, 225.

Sticholotis madagassa, Weise, 364.

Stictoptera antemarginata (Saalm.),

cucullioides, Guen., mentioned,

pecilosoma, Saalm., 8.

Stratiomyiide, by Dr K. Kertész,

95-104.

Stratiomyiine, 96.

Stratiomys cequalis, Walker, 96.

Strumigenys godeffroyi, Mayr,

mentioned, 160.

rogerl, Hmery, 160.

scotti*, Forel, 159.

Stylocheiron, G. O. Sars, 134.

abbreviatum, G. O, Sars, 134.

abbreviatum, Hansen, 134.

carinatum, G. O. Sars, 134.

carinatum, Hansen, 134.

chelifer, Chun., 134.

elongatum, G. O. Sars, 135;

mentioned, 120.

elongatum, Hansen, 135.

elongatum, Holt & Tattersall,

135;

Jflexipes, Ortmann, 133.

longicorne, G. O. Sars, 134.

longicorne, Hansen, 134.

microphthalma, Hansen, 134.

suhmi, G. O. Sars, 134.

suhmi, Hansen, 134.

Styringomyia, Loew, 206; men-

tioned, 196, 207, 208.

annulipes, Enderlein, 207;

mentioned, 196, 214.

ceylonica, Edwards, mentioned,

196, 208.

crassicosta, Spetser, mentioned,

196, 206, 207, 208.

didyma, Grimshaw, mentioned,

208.

gracilis, Loew, mentioned, 208.

howardi, Alexander, mentioned,

208.

mahensis*, Hdwards,

mentioned, 207, 214.

seychellarum, mentioned, 208.

206 ;

venusta, Loew, mentioned, 208.

(Idiophlebia) crassicosta, Spei-

ser, mentioned, 208.

Sufetula minimalis, Fletcher, 25.

Sunniva minor, Budde-Lund, men-

tioned, 369.

Sycorax, Curtis, mentioned, 431.

silacea, Hal. MS., mentioned,

431.

sp. 431; mentioned, 423, 424.

Sylepta derogata, Mabr., 26.

Sympetrum luminans, Karsch, 437.

meridionale, Se/ys, water-mites

clustering on wings of, men-

tioned, 446.

Syngamia abruptalis, Walker, 26.

Synnotum aviculare, Piper, 139 ;

mentioned, 137.

Syntarucus telicanus, Lang, 20.

Systolederus, Bolivar, 264.

sp., 264.

Tachys, Schawm, 250.

bibulus, Coquerel, 250; men-

tioned, 240, 241, 242.

bibulus, Alluaud, 250,

debilis, Pér., mentioned, 251.

humeralis, Pé7.,

251.

humilis, read humeralis, Pér.,

mentioned, 251,

seychellarum*, Scott, 250; men-

tioned, 240, 241, 251, 262.

Teniorhynchus, <Arribalzaga, 89 ;

mentioned, 81.

species? (probably new), 89.

Tapinoma melanocephalum, Fabr.,

164.

Tarache malgassica, MJab., 10.

rachiastris, Hamps., 10.

mentioned,

Tarytia, Cameron, 175.

minuta*, Morley, 175.

Tasiocera, Skuse, 210; mentioned,

195, 211.

minutissima*, Hdwards, 210;

mentioned, 214.

Tattersall, W. M., On the Mysi-

dacea and Euphausiacea collected |

in the Indian Ocean during 1905,

119-136.

Tauchira, Sfa/, mentioned, 272.

Technomyrmex albipes, Smith, 164;

mentioned, 165.

Tegeocranus, Vicol, mentioned, 351.

cepheus, Can. e Fan., men-

tioned, 351.

velatus, Michael,

350, 351.

Teinobasis, Airby, mentioned, 445.

alluaudi (Martin), 445; from

mentioned,

subsp. foreli, Lmery, 164. |

Madagascar, mentioned, 446. —

Telebasis, Se/ys, mentioned, 445.

alluaudi, Martin, 445,

lorquini, Se/ys, mentioned, 445.

rufithorax, Se/ys, mentioned,

445,

Telenomus, Haliday, 51.

mahensis*, Kieffer, 52.

myrmidon*, Kieffer, 52.

seychellensis*, Kieffer, 51.

Telmatoscopus, Haton, 429; men- |

tioned, 424.

advenarothschildii, Zaton, men-

tioned, 430.

ambiguus, Zaton, mentioned,

430.

consors, Eaton, mentioned,

430.

decipiens, Haton, mentioned,

430.

fryeri*, Haton, 430; men-

tioned, 423.

meridionalis, Haton, mentioned,

430.

- morulus, Zaton, mentioned,

430.

Rothschildii, Haton, mentioned,

430.

soleatus, Haliday MS., Walker,

mentioned, 430.

ustulatus, Haliday MS., Walker,

mentioned, 430.

Telonomine, 51.

Temnora fumosa, subsp. peckoveri,

Butler, 15,

INDEX

Temnora fumosa peckoveri, Rothsch. |

& Jord., 15.

Temnorrhyncus, Hope, 229.

repandus, Burm., mentioned,

229.

truncatus, Alug, 229;

tioned, 217, 220.

truncatus, Alluaud, 229.

Teracolus aldabrensis, Holland, 19.

evanthides, Holland, 19.

pernotatus, Butler, 19.

Terias, Swainson, mentioned, 19.

boisduvalliana, Mabille, 19.

brigitta, Cramer, 19.

men-

desjardinsi, Boisd., mentioned,

119:

floricola, Boisd., 19.

Terrestrial particularly

considered in Relation to the

Distribution of the Southern

Species, by the late Dr G. Budde-

Lund, 367-394.

Tetragonoderus, Dejean, 246.

Tsopoda,

bilunatus, A/ug, 246; men-

tioned, 240, 241, 242.

Tetramorium blochmanni. J ore/,

160.

subsp. montanum, Vore/,

160.

Teucholabis, Osten-Sacken, 205;

mentioned, 208.

flavonotata*, Hdwards, 205 ;

mentioned, 196, 214.

Thalamoporella falcifera, Hincks,

mentioned, 145.

indica, /incks, mentioned, 145.

rozieri, Aud., 145; mentioned,

138.

Thaumastoptera, Mik, 205.

aldabrensis*, Hdwards, 205;

mentioned, 195, 214.

Theobald, Fred. V., Diptera, Culi-

cide, 81-94.

Thermesia rubricans, Zoisd., 10.

Thersilochus, //olmg7., 178.

evanescens*, Morley, 178.

minutus, Bridgm., mentioned,

179.

moderator, Gravenh.,

tioned, 179.

Tholymis tillarga, /abr., mentioned,

446.

Thornely, Roscoe, The

Marine Polyzoa of the Indian

Ocean, from H.M.S. “ Sealark,”

137-157.

Laura

men- |

495

Thrypticomyia, Skuse, 199; men-

tioned, 195, 200.

| auripennis, Skwse, mentioned,

196, 200.

saltans, Doleschal/, mentioned,

211).

seychellensis*, Hdwards, 199 ;

mentioned, 196, 200,211,214.

Thyridid, 20.

Thysanopoda, H. Milne-Edw., 128.

| equalis, Hansen, 128.

equalis, Tattersall, 128.

agassizii, Ortmann, 128.

agassizii, Hansen, 129.

129.

distinguenda, Hansen, 129.

ctenophora, Ilig.,

distinguenda, Holt & Tatter-

sall, 129.

microphthalma, G. 0. Sars, 129.

microphthalma, Hansen, 129.

monacantha, Ortmann, 128;

mentioned, 129, 136.

monacantha, Hansen, 129.

obtusifrons, G. O. Sars, men-

tioned, 128.

orientalis, //ansen, mentioned,

129.

pectinata, Ortmann, 129 ; men-

tioned, 136.

pectinata, Hansen, 129.

tricuspidata, HH. Milne-Edw.,

128.

Tinda, Walker, 95.

modifera, Walker, 95.

Tineidz, mentioned, 1.

| Tineina, distrib. of mentioned, 2.

Tipula, Zinn., mentioned, 195.

Tipulide, Diptera, by F.W. Edwards,

195-214.

Tipulidze longipalpi, mentioned, 195.

Tortricide, mentioned, 1.

Tortricina, distrib. of mentioned, 2.

Tournefortia argentea, Linn. (/:,

mentioned, 362.

Toxorrhina madagascariensis, Mev-

nier, mentioned, 196, 204.

Tramea, //agen, Australian, men-

tioned, 446.

basilaris (Pal. de Beauv.), 438 ;

mentioned, 435, 446; from

Aldabra, 446,

burmeisteri, Airby, mentioned,

138.

continentalis, Selys, 439.

limbata (Desj.), forma, 439 ;

mentioned, 435, 446.

496

Tramea limbata, Calvert, 459.

madagascariensis, Kirby, 439.

Trentepohlia, Bigot, mentioned, 211.

Trichoenemis bilineata, Selys, 442.

cyanops, Selys, 443.

Trichomanes cupressoides, Desv.,

409; mentioned, 408.

cuspidatum, Kuhn, 409.

erosum, Willd. (2), 409; men-

tioned, 408.

obscurum, Blume, mentioned, |

410,

var. pectinata, Mett., 409. |

rigidum, Baker, 409.

Trichomyia, Haliday MS., Curtis,

mentioned, 430.

urbica, Haliday, mentioned, 430.

Trichoniscus, Brandt,mentioned, 389.

antennatus, Budde-Lund, 389.

Trichorchina, Budde-Lund, 382;

mentioned, 368.

albida, Budde-Lund, men-

tioned, 382.

micros*, Budde-Lund, 383;

mentioned, 382, 394.

minutissima*, Budde-Lund,

383; mentioned, 368, 382, |

383, 394.

quisquiliarum, Budde-Lund,

384: mentioned, 382, 394.

tomentosa, Budde-Lund, 384 ;

mentioned, 382, 394.

Triglyphothrix striatidens, Hmery,

160.

var. felix*, Forel, 160.

Trigonidium, Rambur, 288.

erythrocephalum, Walker, men- |

' tioned, 288.

perpusillum*, Bolivar, 288.

var. impicticolle, Bolivar, |

289.

var, infuscatum, Bolivar, |

289.

var. ruficeps, Bolivar, 289. |

vittaticolle*, Bolivar, 289. |

Trithemis, Brauer, mentioned, 446. |

Troglocaris, Dorm., mentioned, 461. |

Tryphonine, 172.

Tubucellaria cereoides, Ellis &: Sol.,

145; mentioned, 138.

var. chuakensis, Waters,

146; mentioned, 138.

Waters,

zanzibarensis, men-

tioned, 138.

Tura, Budde-Lund, 378.

albipennis*, Budde-Lund, 378.

| Utetheisa

| Vitaticella

| Vittaria elongata,

INDEX

Tura angusta*, Budde-Lund, 378 ;

mentioned, 370.

laticauda*, Budde-Lund, 378.

testacea, Budde-Lund, 378.

Tylide, 391.

Tylides, 391.

Tylos minor, Dollfus, 391; men-

tioned, 368, 369.

Ulomyia fuliginosa, Meigen, men-

tioned, 432.

aldabrensis, /Tetcher,

mentioned, 6.

diva (Mab.), 6.

elata (abr.) ab. diva (Mab.), 6.

lactea, subsp. aldabrensis,

Fletcher, 6.

pulchella, Zinn., 6.

pulchelloides, Hamps., 6.

Verschafteltia, H. Wendl., men-

tioned, 225.

splendida, H. Wendl., men-

tioned, 225.

Vespide, 44.

Vireosa, Jord. & Snyder, mentioned,

302.

buskii,

139; mentioned, 137.

erystallina, Wyv.-Thoms., |

mentioned, 137.

Sowerby, var.

ensiformis, Sowerby, 418; men-

tioned, 408.

elongata, Baker, 418.

ensiformis, Sowerby, 418.

isoetifolia, Bory, 418; men-

tioned, 408.

lineata, Baker, 418.

plantaginea, Bory, 418.

scolopendrina (Bory), Thwait.,

418; mentioned, 408.

Vollenhovia levithorax, Hmery, 162. |

— subsp.alluaudi, Hmery,162. |

piroske*, Morel, 162.

subtilis, Hmery, mentioned,

162, 163.

Wallacea, Dol., 95.

albopilosa, Meijere, 95.

Warburton, Cecil, The Acarina

of the Seychelles, 349-360.

Water-mites, larval (Hydrachnide),

mentioned, 446.

Wormia ferruginea, Baillon, men-—

tioned, 223.

Wyv.-Thoms., |

Bie) 5 |

Xamerpillus*, Sicard, 366.

gahani*, Sicard, 366.

Xanthexochus, mentioned, 174.

Xanthocampoplex, mentioned, 174.

Xanthocharops*, Morley, 173;

| mentioned, 174.

primus*, Morley, 174.

| Xanthopimpla, Sawsswre, 171; men-

tioned, 174.

eous*, Morley, 171.

immaculata, Morley,

tioned, 171.

men-

tigris, Krieger, mentioned, 171.

Xenoconger*, Regan, 301.

fryeri*, Regan, 301.

| Xenotoma, /érster, 76.

insularis*, Kieffer, 76.

| Niphocaridina, Bouvier, mentioned,

461.

Xiphocaris, mentioned, 461.

Xylocopa caffra, Pérez, mentioned,

37.

Xylocopide, 36.

Zaodontomerus, Ashmead, men-

tioned, 36.

| Zarceus, Bolivar, 289; mentioned,

263.

fallaciosus, Bolivar, 289 ; men-

tioned, 290,

major*, Bolivar, 290; men-

| tioned, 292.

| Zinckenia fascialis, Cramer, 25.

| Zizera gaika, Trimen, 19.

| lysimon, Hiibner, 19.

| maha, Kollar, 19.

(1) malathana, Boisd., 19.

| Zoanthidea, 395-398.

| Zoanthidean larvee, mentioned, 395.

| Zoanthina, v. Beneden, mentioned,

395.

diamanta*, Bamford, 396;

mentioned, 406.

gardineri*, Bamford, 398;

mentioned, 406.

sladeni*, Bamford, 397 ; men-

tioned, 406.

variabilis*, Bamford, 396.

Zygonyx (2) luctifera, Selys, 437.

Zygoptera, Popofsky, of the Sey-

chelles, mentioned, 446; with

mites on the sternum, mentioned,

446.

Zyxomera petiolatum (Ramb.), 438 ;

mentioned, 446.

sechellarum, Martin, 438.

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VI. Parts I-VIII. 1894-99...617 6.5 3 3 sai a coe “fy ee : e

ar > ace Ho ofan

VII. Parts 1-XI. 1896-1900...6 7 9...415 9 (In progress.)

VIII. Part IL .:. 1900 ...010 0:..0 7 6 | "Meee Part I. ... 1908 ... 0) 2 OneneIeeeenn

Part IL‘: ....). 1900-10-10) "0.0" Foe Part Il. ... 1909...0 8 0 xGnuRuee

Part IDL: iJ. 91900... 0 10" O20 738 Part III. ... 1909 ..:0° 6 @ s.sQueeeeee

Party 1V, -.c 11901 2. O40 2 Ome Part IV. ... 1909 ... 012 0 .. QUugeee

Parte Ve -s.5 1901 13.0) 5 Ol OF eo 8 Part V. ... 1909 ...0 2 0... Ommme

Part Vises cs. aLOOL) ... OPLO) Oe Omer nG Part VI. ..- 1910:... O11 0) 2cocOkeesmeee

Part’ 40K... 1908 420. BO 2y08 Ss Part IX. «=. 1911 ..0 2 6 an

Rats 3° 4° 1908 vs. 0 On Outen Part X. .... 1911 ....0 2 06 sougnneeee

Part eX; 2:3... 1903. ..2 @iOrasomenaG (In progress.)

seer eee ae a ake : : XI Pat L ... 1907.1 8 0 an

ae : 3 te se : Part Il. ... 1907)... 1 4 Oo Oa

iX. Park 1 ewons. of 6. 9 OOraeies Bee al 1908 2 Gir: Oe

ParoelV.. .... 1909)'2a de 1Om0 1 eS

Part JU * 26 9903. -.:.0 8° Oulor 60 GeV. Index 1909 ... 0 5k? Ga

Part TGR? 24908)... 4. O'. 0 18) 6 amen a

ah =i S, i “ee 6 0..0 4 6 | yiT Pert T. ... 1909... 1 4 0 0) ee

Py TG. o 6 Ot ae Pat Il. ... 1910...2 8 0... aaa

Pak iE EA. o : mee A ; Part Ill. ... 1910...016 0.012 0

Cage as aa IV. Ind ate Bes 3 9

Part VIII. ... 1904 ...010 0...0 7 6 pe, dex 1910. ee

Part IX. ... 1905 ..0 6 0..0 4 6] XIV. Part I. ... 1910...118 0..1 8 6

Part: “Xeno elo Obie .e-.0) 419.40) 2. Onno mA Part ll. ... 1911.2. 1 (0 MO eO mle

Part XI. ... 1907 ...012 0...0 9 0 Part Ill. ... 1911 ... 1 SON.

Part XII... 1907 ...0 3 0...0 2 3 Part IV. Index 1912 ...0 5 0..0 3 9

Bare XCLUL cies GOR e085 GO Meera ane

Part XIV. Index1907. -..0 3 0...0 2 3 | XV. Pars TE «. 1912)-.. 1) 900

2nd Ser. ZOOLOGY. | (VOL. XV. PART 2.

THE

TRANSACTIONS

LIBRARY|

le D> ip

THE PERCY SLADEN TRUST EXPEDITION

THE. INDIAN OCEAN IN 1905,

UNDER THE LEADERSHIP OF

Mr J. STANLEY GARDINER, M.A.

VOLUME Iv.

REPORTS Nos. 11—18 of this volume; Nos. 69—76 of the whole series.

LONDON:

PRINTED FOR THE LINNEAN SOCIETY

BY JOHN CLAY, M.A, AT THE UNIVERSITY PRESS, CAMBRIDGE.

SOLD AT THE SOCIETY'S APARTMENTS, BURLINGTON HOUSE, PICCADILLY, W.,

AND BY LONGMANS, GREEN, AND CO., PATERNOSTER-ROW.

September 1912.

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LINNEAN SOCIETY OF LONDON.

MEMORANDA CONCERNING TRANSACTIONS.

The First Series of the Transactions, containing both Botanical and Zoological contributions, has been

completed in 30 Vols., and a few entire sets are still for sale. Only certain single volumes, or parts to

complete sets, may be obtained at the original prices. The price of the Index to Vols. 1-25 is 8s. to

the public, and 6s. to Fellows; to Vols. 26-80, 4s. to the public, and 3s. to Fellows.

The Second Series of the ‘l'ransactions is divided into Zoological and Botanical sections. The prices

of the Zoological parts of those which have been published are as undermentioned :—

Srconp Srer1Es.—Zoooey.

When Price tu the

Volume Published Public

Soman

I. Parts I—VIII. 1875-79 ... 8 10

II. Parts I. XVIII. 1879-88 ... 7 17

Ill. Parts I+ VI. 1884-88 ... 5 18

IV. Parts I.-III. 1886-88 ...3 8

Venbarismele el aSSS—94 ceo 0

VI. Parts I.—-VIII. 1894-99... 6 17

VII. Parts I.-XI. 1896-1900...6 7

VillieeParte sl: me L900L ee ON10

Parte ls e900) ee OO

Parte cee O00) cee OM

Parti. een L901 ee0) 14

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Porte Vilaw son OOS Oe 0

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PartaVilliles. 1902) 0) 4

(Parte | 1902) 0" 5

Part X. eee 905 and)

Rarteexdumnece 81903) 2.80) 06

Partaxdiiewee.) 9903) =..10) 10

Part XIII. Index O18

LX. “Part eee GOS Vec-kO) 29

Parts ieee 903) ae Ole 8

liethen IMME sss TIGKO8 i Asan alan

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Part XIV. Index1907 ...0 3

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(0) Bae

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Cee) a) SS) eS) ee SS ea)

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Volume

XII.

XIII.

XIV.

XV.

Seconp SeRiES.—ZooLoay (continued).

When Price to the Price to

Published Public Fellows

co) GR Li retand.

leery JE «- 1904 ... 0 3) 10) oO vem

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Part IV. ... 1905 ...'0 10° 0 <2nOMaveetG

Part V. -. 1906... 0 7% (6) 20M

Part VI. .... 1906 ... 0 “3 (0) ssiOumDeeey

Part VII. ... 1907 ... 0 3 0 cen Qieue

Part VIII. ... 1907 ... 0 4 0) eenOMEamnO:

Part IX. ... 1909 ... 1 1 0 000i

Part X. ... 1911 ..: 10° 4 (0 enOMeenO

(In progress.)

Part) 1. .» 1908... 0 4 Ol Se Omeseeny

Part II. ... 1909... 0 8 0) =0—NGmeO

Part III. ... 1909 ... 0 6 Of .9nOMeeaueS

Part IV. ... 1909 ... 012 Op ORROmED

Part V.. ... 1909 ... 0. 2) {0's Reet

Part VI. ... 1910... 0 1 (O02 350seuees

Part VII. ... 1910 ...'0 5 0) ).4m0MeemeS

Part VIII, ... 1911 ... 0 4 0 =.50NoME

Part IX. ... 1911.0 2 6 ...G/——

Port X. ... 1911...0 2 6 ene

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Part J. ... 1907 ... 1 (Si <Q) cei

Part I]. ... 1907... 1 40 ..sOMiSmee

Part, III. ... 1908 ... 0416) 0° -2s0miemaG

Part IV. ... 1909 ... 110 ‘O02 cc

Part V. Index 1909 ...0 5 0... 0 “3999

Part I. ... 1909 ... 1 4,0 2:00mIemeG

Part I]. «... 1910 ... 2 13> Ope samilagemee

Bart) JIT. ... 1910 ... 016) OsHiOmemmO

Part IV. Index 1910 ... 0-5) (0). Ou

Party I. ... 1910 ... 1:18) Oe ioeee

Part) II. ... 1911 ... 2 (0; Os 20Mismee

Part III. ... 1911 ... 1-8 0 73

Part IV. Index 1912 ...0 5 0...0 3 9

Bartecl. ... 1912)... 292 Olesen lend ee

arty D. ... 1919.2 1 4 Ore nO wim

Parteelil.: ... 19129 .: GH OmeeeO no me

Part IV. ... (In preparation.)

2nd Ser. ZOOLOGY. | [VOL. XV. PART 3.

THE

TRANSACTIONS

THE LINNEAN SOCIETY OF LONDON.

THE PERCY SLADEN TRUST EXPEDITION

THE INDIAN OCEAN IN 1905,

UNDER THE LEADERSHIP OF

Mr J. STANLEY GARDINER, M.A.

VOLUME Iv.

REPORTS Nos. 19—24 of this volume; Nos. 77—82 of the whole series.

LONDON:

PRINTED FOR THE LINNEAN SOCIETY

BY JOHN CLAY, M.A. AT THE UNIVERSITY PRESS, CAMBRIDGE.

SOLD AT THE SOCIETYS APARTMENTS, BURLINGTON HOUSE, PICCADILLY, W.,

AND BY LONGMANS, GREEN, AND CO., PATERNOSTER-ROW.

December 1912.

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LINNEAN SOCIETY OF LONDON.

MEMORANDA CONCERNING TRANSACTIONS.

The First Series of the ‘Transactions, containing both Botanical and Zoological contributions, has been

completed in 30 Vols., and a few entire sets are still for sale. Only certain single volumes, or parts to

complete sets, may be obtained at the original prices. The price of the Index to Vols. 1-25 is 8s. to

the public, and 6s. to Fellows; to Vols. 26-30, 4s. to the public, and 3s. to Fellows.

The Second Series of the Transactions is divided into Zoological and Botanical sections. ‘The prices

of the Zoological parts of those which have been published are as undermentioned :—

Srconp Serres.—Zooxoey. Seconp SERiEs.—ZooLoay (continued).

When Price to the Price to When Price to the Price to.

Volume Published Public Fellows | Volume Published Public Fellows

£ s.. d. £5 d, £ ie de ey th

J. Parts J.-VIII. 1875-79 ...8 10 0...6 76 X. Bart I. - 1904... 0 3 (0) ce O Riau

Part II. ... 1904 °..°0 $8) O};ROREEEE

III. Parts I. VI. 1884-88...518 0...4 8 6 Part IV. ... 1905 -.. 0 10) 0 =a

Part V. ... 1906... 0 7 (6G esesOReee

IV. Parts I-III. 1886-88 ...3 8 0...2 11 70 Part VI. ... 1906 ....0 3 O)@nOieeemee

; Part VII. ... 1907 ...0 3 0 00namme

V. Parts I-XI. 1888-94...610 6...417 9 Part VIII. ... 1907 ... 0. 4 0 :nOnMeHED

VI. Parts I-VIII. 1894-99...617 6..5 3 Fort IX. ... 1909-1

Part X. ... 1911 ...°0 4 (O0perORme

VII. Parts 1—-XI. 1896-1900...6 7 9...4 15 9 (In progress.)

VII. Part I... 1900 ..010 0..0 7 6| XL Part I... 1998...0 4 0..0 3 0

Part “TV... bi Sao Om aeenee Part IV. ... 1909 ...012 0 ..00gmmm

Pach Viet vc. 1901 Lee eee Part VI. ... 1910... 011 0 aan

Part VIL... 1901 1 @ Oh ee Part VII. ... 1910... 0) 5) O}senOneeee

Part VIII. -... 1902 0-4 0.2.0 30 Part VIII ... 1911 ... 0 4 0) aOR

Part IX. 4 1902 (Oesy Wnty 8) Part IIx we. «61901 22025 6a 0 2 0

Part X. k 1903 1 On OMeROntD eo Part x; .-- 1911 ...'0 2) ‘6 Soe

Part XL... 1903... 0 160 vOut einen

Part XII... 1903 0°10’ 10... OF 6s Sxlieeart I: - 1907 ... 1:8) (0).

Part XIII. Index 0. 2. 9 SO pserS Part IJ. ... 1907... 1 4 0) 330mieEee

Part III. :.. 1908 ... 0116 0 \-RORiemO

IX. Part Sik :s “1903 \....0 99 WORPOlGeeo Part IV. ... -1909 ... 1 10-0).

Part, Wee, 1903. «.-..0° 8 “ONO eGeaO Part V. Index 1909 :.. 0 5 Ol2.0mameG |

Part UG Sel 903. 1) 4s 10. nOMISEO )

Part IV. ... 1904 ...0 6 0..0 4 6 | SWE Part I... 1909 ...1 4 0 S250RteRe

Part Vo S904 ....0 “6.03 Gee Part II. ... 1910 ... 2 3 OQ) Ssgiiioes |

Part VI. 5, 0904. ....0 6.0... Oe Part III. ... 1910 ... 0°16 0) -290mizene

Part VII. ... 1904 ...0 6 0..0 4 6 Part IV. Index 1910 ...0 5 0...0 3 9

Port VIM, = 1904 ...0 10 0:.0 7 67) Gaye I... 1910 eae

Part TX eer905: --0" 6) Oe OmeeeG Poet TI 1911 a OF 6 015 0

Part X.° 2 9a806.-..:- 0/12 -0%4 Ono — a pid

Par X0, 20 SUOR v0 49) Open Part II]. ... 1911 ... 1) 8) (0)

Patt ale | OMOT hs -0- 3,0 a Part IV. Index 1912 ...0 5 0... O00 geee

Part Xd cea ave O- 6) One Omel ang XVerePart I.- .... 191255. 19) OOM ee

Part XIV. Index1907 ...0 3 0...0 2 8 Part. II. ... 1912... 1 4° O0siioeae

™

ra +

2M NY ‘\

O° \o ;

-\° and Ser. ZOOLOGY.) (VOL. XV. PART 4

THE

TRANSACTIONS

THE PERCY SLADEN TRUST EXPEDITION

THE INDIAN OCEAN IN 1905,

UNDER THE LEADERSHIP OF

Mr J. STANLEY GARDINER, M.A.

VOLUME Iv.

REPORTS Nos. 25—28 of this volume; Nos. 83—86 of the whole series

with

TITLEPAGE, CONTENTS, AND INDEX.

LONDON:

PRINTED FOR THE LINNEAN SOCIETY

BY JOHN CLAY, M.A. AT THE UNIVERSITY PRESS, CAMBRIDGE.

SOLD AT THE SOCIETY'S APARTMENTS, BURLINGTON HOUSE, PICCADILLY, wW.,

AND BY LONGMANS, GREEN, AND CO., PATERNOSTER-ROW.

’

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‘

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LINNEAN SOCIETY OF LONDON.

MEMORANDA CONCERNING TRANSACTIONS.

he First Series of the ‘Transactions, containing both Botanical and Zoological contributions, has been

completed in 30 Vols., and a few entire sets are still for sale. Only certain single volumes, or parts to

complete sets, may be obtained at the original prices. The price of the Index to Vols. 1-25 is 8s. to

the public, and 6s. to Fellows; to Vols. 26-30, 4s. to the public, and 3s. to Fellows.

The Second Series of the 'I'ransactions is divided into Zoological and Botanical sections. ‘I'he prices

of the Zoological parts of those which have been published are as undermentioned :—

SeconD SERIES.—ZooLoey. SECOND Szries.—ZooLoey (continued).

When Price tu the Price to When Price to the Price to

Volume Published Public Fellows Volume Published Public Fellows

Hy MUR =o ee is £8 was £ 85) Gde

I; | Parts T=VIl as%5=79i. 8 10° 0-26 9% 6 xG ‘Part I. «as L904 ... 10S NOR Ome

E Bartel ... 1904 ... 0-38) 0) Or Gene

Ie Partsle XV wsy9=sSiee la (O)--o a8) vo Parte, .. 1905 ... 0 9) 0... kOUnGame

IIL. Parts I. VI. 1884-88...5 18 0..4 8 6 ee (1905 -. 080

Parteave.... 1906. ..: 0: WWoGieeen (eames

IVa eRarts) Uo wISS6-88ineeo eS) Ore 2 lO Parte vile’ ... 1906 ... 0 93 Of sOmeoem

Panta: =... 1907 .:. 0: 3° Ome Oune emer

VI. Parts I-VIII. 1894-99...617 6.5 8 8 Tee +1909"... 1

Partwexe, s. 1911 ... 0 4 0) Se t0neemn

VII. Parts I.—XI. 1896-1900...6 7 9...415 9 (In progress.)

Xi.’ Pareles... 1908 ....0 4 0) .. Oem

Vill. Part 1 ceo LSOTO) SO IKGY TORSO 7h Parties... 1909 .«. 0 80)... 0mIGHEU

Part Il .. 1900 ..010 0...0 7 6 Parole... 1909 ... 0 6 0 c. Gemma

Rants lUileeee 1900) wes OMlO mn eetO iz Partsive. ... 1909 ... 0 12 6 ....Geuomen

Part UV ee S90 lO 14 Ore OM0R 6 Partmevee eee..11909 ... 0 2°10) eon OMnieenG

Part V. ... 1901 ..0 5 0..0 3 9 Part Vibes. 1910 ... 0-11 “Wee nOucomee

Part VI. ... 1901 ..010 0...0 7 6 Part. Viluw 1910 ....0 5 OeeOueomee

Part VII... 1901 ..1 8 O..1 1 0 Part Vil @.. 1911 ... 0 4,.0...03uNO

Part) Ville... 1902 9...10) (4. 0...210) SiO Part =iXeeee 1911 ....0 2 GesOmecent

Parti xeee weeL902) 23510 Ds Ole On on) Parte Kau) 1911 .... 0 2 G SOnaoeee

Parhoe Xe O03) sl) 0) 40i 0) Lon 0 (In progress.)

Part XI. &s 0903 <-..0 6 O....0) 4. 6) Atl santo 907: 5. 1 8° (0 Seana

Part, Xd) 22-2903 =O 10 "Ox. .0) HE 6 Part II. ye 11907 ... 1 4 OF SRORISiRO

Part XIII. Index Pic 2 95.10) Oe 8 Part Dees 1908 3.0 16 Ob OMgee

, Bart Vacs 61909! :... 1 10 0%. ol? ae

IX. Part IL... 1903 ..0 9 0...0 6 9 Part V. Index 1909 ...0 5 0...0 3 9

Part Uy «+903, 90 8 0.50 6 0 | yi eee eee goo... 1 eno). One

Parte Wi OOS le 4 0 ONS HO) ;

Pie 1 1904 6 0 Pantymlilae ese, L9T0"--.)2). 3) 0! .. eal mnes

keg en Ot eeEA< G esky : : Part Mile’ s. 1910016 0 .monoene

Part “VI. cae a0 MOE OO i ‘ Part IVedndexs1910)... 0 5 0 12800 Sieg

Part Ville 904. EeOnmGN TON. Ol 4eG XIV. (Partie eee Loo e.. 1 18 “ORealacuae

Part VIII ... 1904. ...0 0 0...0 7 6 Part Il ... 1911...1 0 0..015 0

Part UX.) «25. 190h. PewOre Gy 0.2110 2G Parte leek oli ... 1 SUyORec aie a0

Part Xo oan LOCGm eR OMIOL F014. 0) SOO Part suVeindex L912... 0 S 10h. Om sind

Part) Xe a) 190% ROME sO... O 998 iO XV. warty ees SLOLS ..0 1. (ORO meri nD

Partexty os... LOOT BenOmowO > ..10) sOiens Partamlileeeee: 1912... 1. A Or ee aise)

Bart Ke. TOOT semen Ol. 0nAanG Partial sr 1912 ... 10 W6eORee Omg hac

Part XDV. Index 1907— <-..0) 3" 0....0 2.53 Part! (Ve &:se.' 1913. «.. 0 1250) nO O20)