1. STRATIOMYIIDAE

Von Erwin LINDNER (Stuttgart) x4

Das BrITISCHE MusEuM betraute mich mit der Bearbeitung der Stratio-

myiiden der ,, Ruwenzori-Expedition 1934/35 des Britischen Museums“. Die

Ausbeute der Expedition bestand aus 22 Arten in 57 Exemplaren, die zum

iiberwiegenden Teil von Dr. F. W. Edwards zusammengebracht wurden und die

durch die besondere Giite der Erhaltung bzw. die auf den ersten Blick sich

verratende fachmannische Behandlung schon beim Fang sich auszeichnen.

Diesem letzteren Umstand ist es auch zu verdanken, dal’ verhaltnismabig

viele kleine Formen gefunden wurden, und daB die Pachygastrinen in

zahlreichen neuen Arten festgestellt werden konnten. Nicht weniger wie I1

der 22 Arten der Sammlung gehoren zu den Pachygastrinen und 6 von ihnen

waren bisher unbekannt.

Die meisten neuen Formen stammen natiirlich aus der Hochregion des

Ruwenzori. Besonders ergiebig war offensichtlich das Hochlager im Namwamba

Valley, von wo ich je eine neue Solvine, Geosargine, Stratiomyiine und nicht

weniger wie 4 neue Pachygastrinen beschreiben kann, zu welch letzteren noch 2

bekannte Arten hinzukommen.

Von den neuen Arten dieser Hochregion ist eine als neue Gattung festgestellt

worden (Himantochaeta), und sehr interessant ist das gemeinsame Vorkommen

einer neuen Platynomyia zusammen mit Platynomyia dimorpha Kert. Ich

benenne sie zu Ehren des Sammlers Platynomyia edwardsi. Beide Arten sind

sehr a4hnlich, aber deutlich verschieden und in der neuen Art scheint ebenso der

Hochgebirgscharakter zum Ausdruck zu kommen ( Verdunkelung), wie bei einer

neuen Microchrysa ruwenzoriensis (von derselben Ortlichkeit) mit auffallend

langer Behaarung. Uberraschend ist das Vorkommen einer Dyosimomyia

(mercurialis ), die sehr Ahnlich der von Kertész beschriebenen Art Dros. natalensis

ist.

Merkwiirdig scheint, da8B der Charakter der Gattung Ptecticus in der neuen

Art rufipes vom Mobuku Valley aus 7-8000 ft. Hohe so wenig verandert ist.

Nicht nur da8 das Tier iiberhaupt keine Verdunkelung aufweist; auch die #, die

bei den meisten Arten + schwarz gezeichnet sind, sind fast ganz ungezeichnet

rot.

Der héchste Fundort, der Mt. Karangora, 9900 ft., brachte noch eine neue

Microchrysa; ein bemerkenswerter Fund, insofern als er den Unterschied dieser

ih, 3

2 RUWENZORI EXPEDITION

tropischen Hochgebirge von unseren europaischen aufzeigt, in welchen in tiber

3000 m. Hohe sicher keine Microchrysa mehr vorkommt.

Im Ganzen kann gesagt werden, dal das Ergebnis der Untersuchung darauf

hinweist, daB aus den afrikanischen Gebirgen noch viel neue interessante

Formen, besonders aus den héheren Regionen zu erwarten sind und daB8 die

friiher vermutete Armut Afrikas an Pachygastrinen darauf zuriick zufiihren

ist, daB die meisten ,,Sammler“ in Afrika eben ,,GroBwildjager ‘‘ waren.

Hanauia gracilifemur sp. n.

9. Schwarz, mit der gewohnlichen gelblichen Zeichnung und silberigen

Behaarung auf Kopf und Thorax. Riissel und Taster wie bei den beiden andern

Arten gelblich. Fihler etwa 1 1/2 solang wie der Kopf, dunkelbraun, auf der

Innenseite etwa bis zur Halfte zart gelblich. Schulterflecken, die Verbindung

zu den Fliigelwurzeln und das Schildchen gelb; dieses an der Basis schwarz

oder schwarzlich. Hiften und # gelblich. Die Tarsen gegen das Ende gebraunt.

Endtarsen ganz dunkelbraun. Ebenso die ¢3 dunkelbraun, mit Ausnahme

der Basis auf der Innenseite und einem ebenso hellgelblichen, dorsalen Streifen

von der Basis bis etwa zur Mitte. Abdominaltergite schwarz, mit schmalen

gelben Hinterrandsiumen. Von der Mitte des Abdomens ab macht sich eine

Orangefarbung bemerkbar, die sich nach hinten allmahlich erweitert und die am

Hinterrand des 5. und Vorderrand des 6. Tergits sehr stark auftritt. Bauch

gelb. Fliigelgeader typisch.

5-7 mm.

UGaNbDA: Ruwenzori, Namwamba Valley, 6500 ft., und Fort Portal. 3 9.

Auch diese neue Hanauia-Art ist sehr ahnlich aurolimbata Lind. und einer

andern neuen Art aus dem Sudan (H. tbialis Lind., 1938, Mitt. Deutsch. Ent.

Ges. E. V., 8:67). Sie unterscheidet sich von aurolimbata durch die weniger als

zweimal kopflangen Fiihler und dadurch, daB’ das 1. Geibelglied betrachtlich

dicker und langer als die folgenden Glieder ist. Von tibialis ist gracilifemur durch

die langeren, schlanken f, die auf der Unterseite weniger dicht gek6rnelt sind,

und durch die Farbung der ¢3 verschieden.

Ptecticus elongatus Fabricius, subspec.

Es liegt zweifellos eine Subspecies vor, die sich von der Stammform nur

wenig unterscheidet. Die Unterschiede sind folgende: Geringere GrdéBe,

leichte Verdunkelung der Oberseite, groBere Schwarzfarbung an den p. Der

Beginn des 2. Tarsalgliedes der #3 und das letzte Tarsalglied sind in gréBerer

Ausdehnung schwarz. Nicht nur die Vordertarsen, sondern auch die 4 End-

glieder der Mitteltarsen sind schwarz (bei der Stammform sind sie r6tlichbraun!).

10 mm.

UGANDA: Ruwenzori, Kilembe, 4500 ft. 2 ¢1 9.

STRATIOMYIIDAE 3

Ptecticus rufipes sp. n.

Kopf wie der der vorigen Form. Nur die Fiihler etwas gréSer, orange-

farben. Stirn schwarz, Scheitel hinter dem Ozellenhécker gelb. Thorax

rotlichbraun, auf dem Mesonotum leicht verdunkelt, aber ohne deutliche

Streifenzeichnung. Behaarung gelb, auf den dunkeln Stellen schwiarzlich.

p rotgelb. Schwarz sind nur das basale Drittel der 43 und die Behaarung der 4

Endtarsalglieder an den pr und #2. Tarsen der $3 ganz rostrot. Fliigel an

der Basis gelblich, an der Spitze leicht grau. Abdomen rostgelb, dorsal durch

dunkle Behaarung dunkel, das 5. Tergit in der Mitte mit einem schwarzen

Fleck. Hypopygium gro8, rostgelb.

11,5 mm.

UcGanpDA: Ruwenzori, Mobuku Valley, 78000 ft., 1 g. Die Art steht der

vorigen sehr nahe, ist aber sofort an den mit Ausnahme der schwarzen ¢3-Basis

ganz rostroten p3 zu erkennen.

Chrysochroma consors Griinberg

UGANDA: Budongo Forest, 7.11.35. I 9.

Chloromyia caeligera sp. n.

. Kopf schwarz und schwarz behaart. Augen gleichmabig klein facettiert,

mit schwarzer, nicht sehr dichter Behaarung. Fiihler braun, basal und apikal

dunkler. Thorax und Schildchen dunkelgriin, grob gepunktet, schwach

glanzend, auf dem Mesonotum etwas anliegend goldgelb, an den schwarzen

Pleuren weiblich behaart. Fligel grau getriibt, an der Basis ungefarbt durch-

sichtig. Schwinger weiBlich. » gelbbraunlich, f -- schwarz, die Enden braun.

Abdomen wie das Mesonotum grob gepunktet, mit nicht sehr auffallender,

gelblicher Behaarung, dunkelgriin, in der Mitte violett. Auf dem 2., 3. und

4. Tergit findet sich an den Vorderrandern je ein groBer Spiegel ohne die grobe

Punktierung, von prachtvoll blau violetter Farbung.

7 mm.

Kenya: Nairobi, x.1934. I 9.

Microchrysa loewi sp. n.

g. Fihler rotgelb. Kopf schwarz, Untergesicht glanzend smaragdgriin.

Pleuren griin, glanzend. v4 vorhanden, Randmal gelb. Abdomen honiggelb,

letztes Tergit etwas dunkler. gelb, /3 und #3 mit braunem Ring.

Q. Fiihler dunkelbraun (bei dem einen 2 aus 8000 ft. Héhe schwarz).

Stirn schwarz ohne weibes Bandchen. Hinterkopf schwarz. Untergesicht

smaragderiin, ebenso die Pleuren; Sternalregion wie beim 3 schwarz. p gelb

4 RUWENZORI EXPEDITION

mit braunen Ringen an f3 und ¢3, sowie Andeutungen solcher an ¢z und 22.

Abdomen ganz violett, an der Basis griin.

5-6 mm.

Ucanpa: Ruwenzori, Kilembe, 4500 ft. und Mt. Karangora, ggoo ft.;

Kigezi, Mt. Mgahinga, 8000 ft., 4 3, 2 &.

Microchrysa edwardsi sp. n.

Die neue Art ist M. loewi nahestehend. Sie unterscheidet sich aber durch

die etwas andere Form des Kopfes, seine griin-violette Farbung, die braungelben

Basalglieder des Fiihlers, und die gro8ere D.

2. Kopf und Korper griin und violett. Stirn stark violettblau, glanzend.

Untergesicht smaragdgriin. Behaarung wei8lich. Von einem hellen Bandchen

der Stirn ist nichts zu sehen, nur von einer Querfurche; es ist aber méglich,

da8 sich dariiber bei frischen Stiicken doch das helle Bandchen findet. Fiihler

braungelb (das 3. Glied fehlt!), Thorax und Schildchen griin mit violett.

Pleuren griin. Behaarung kurz, gelblichwei8, auf dem Mesonotum nach vorne

gerichtet. Fligelrandmal und Adern gelb, die Adern proximal der D gebraunt.

D ziemlich groB. 74 vorhanden, aber auf den beiden Fliigeln schwach. # ein-

schlieBlich Trochanter und Vorderhiiften gelb, in der distalen Halfte von /3

und ¢3 mit je einem breiten dunkelbraunen Ring. é¢z apikal wenig deutlich

gebraunt. Tarsen apikal gebraunt. Schwinger gelblich. Abdomen dunkel

violett, mit weiblicher Behaarung. Bauch schwarz.

5,5 mm.

UGANDA: Ruwenzori, Bwamba-Pass (west side), 5500—7500 ft., I .

Microchrysa ruwenzoriensis sp. n.

Die Art kénnte als neues Genus, zum mindesten als neues Subgenus auf-

gefaBt werden. Die Behaarung des Ozellenhéckers und des Untergesichts ist

viel langer, die oberen Augenfacetten des ¢ sind weniger vergroBert wie bei den

andern Arten.

g. Obere Augenfacetten groéBer wie die unteren. Stirndreieck und Unter-

gesicht smaragdgriin, ersteres durch eine tiefe Langsspalte geteilt, beide ziem-

lich lang braunlich behaart. Fihler klein, rotbraun, apikal dunkelbraun.

Thorax und Schildchen smaragdgriin glanzend, mit aufrecht stehender langerer

Behaarung und darunter nur halb so langer. # braunlichgelb, mit dunkleren

Endtarsen. Fliigel mit Ausnahme des gelben Randmales und der hellen Basis

schwach grau. Schwinger gelb. Abdomen dunkelgriin, glanzend. Die Tergite

durch starke Einschnitte stark gewolbt.

9. Stirn schwarz, ohne weiBes Bandchen. Untergesicht griin. Behaarung

am Kopf sehr fein und kurz. Thorax violett. Auf den Pleuren griin, glanzend.

Fuhler rotbraun, apikal braun. Abdomen rotgelb mit schwarzen letzten

STRATIOMYIIDAE 5

Tergiten, schwarzen Seitenrandern, Seitenflecken und Mittelflecken der andern

Tergite. Erste zwei Segmente sehr schmal. # gelb, nur mit Spuren von braunen

Ringen an f/3 und #3. Tarsen gegen das Ende braunlich.

Die Zusammengehérigkeit dieses 2 mit dem vorher beschriebenen ¢ ist

nicht ganz gesichert.

4-5 mm.

UGANDA: Ruwenzori, Namwamba Valley, 6500 ft., 2 g (incl. type); Kigezi,

Mt. Sabinio, 7000 ft., 1 9.

Microchrysa ? sp. n.

Das Stiick ist dem g¢ von M. loewi sehr ahnlich, hat aber ganz gelbe p, mit

Ausnahme der etwas geschwarzten Endtarsen. Es ist vielleicht eine var.

oder eine ab. von loewt. Solange nicht groBeres Material aus Kenya vorliegt,

mochte ich von einer Beschreibung und Benennung Abstand nehmen.

4 mm.

Kenya: Chania Falls, 4000 ft., 1 ¢.

Die mir bis jetzt aus Afrika bekannt gewordenen Microchrysa-Arten konnen

nach folgender Tabelle bestimmt werden:

BESTIMMUNGSTABELLE (nur fur die 9)

1. vq fehlt. Stirn griin, mit weiBem Querbandchen. Abdomen schwarz mit violettem und

dunkelgriinem Schimmer. ¢ ohne schwarzen Ring . 0 2 deannulata Lind.

v4 Normalerweise vorhanden : 5 2 d : 5 : : : 74

2. Stirn des 9 ohne weiBes Bandchen : : : é A a 3;

Stirn des 2 mit weiBem Bandchen, Blaech ware: ‘Pahler gelb. Abdomen violett mit

gelbem Saum, f3 und ¢3 mit schwarzen Ringen 5 - Qeivcumscriptum Loew.

(¢ mit Ausnahme des Kopfes wie das 9)

3. Stirn des Q blaugriin oder violettblau. Fiithler, wenigstens die Basalglieder, gelb;

f teilweise mit schwarzem Ring. Abdomen dunkel, nicht griin ; : 4:

Stirn des 9 schwarz . 5.

4. Stirn des ? blaugriin. Piihler pal fe and S3 amit Peierareors Ring. Abdomen ess

Stirn des violettblau. Fiihlerbasalglieder gelb; 3 und ¢3 mit je einem breiten, dunkel-

braunen Ring. Abdomen dunkelviolett . . , 9 edwardsi sp. n.

5. Fihler schwarz oder teilweise dunkelbraun. Abdomen ganz violett, an der Basis griin.

f3 und #3 mit schwarzen Ringen. Endtarsen braunlich . é . loewi sp. n.

Fihler nicht schwarz . : : 0 . : : . ¢ 5:

6. Fiuhler braun. Abdomen Blauschaare: ie und #3 in der Mitte breit schwarzbraun, p2

fast ganz schwarzbraun : : 2 congoensis sp. n. *

Fihler rotbraun, apikal braun. /3 und 13 nur Gat Sour von schwarzbraunen Ringen.

Abdomen rotgelb, mit schwarzen letzten Tergiten, schwarzen Seitenrindern,

Seitenflecken und Mittelflecken der andern Tergite. Erste zwei Tergite sehr schmal

Q ruwenzorviensis Sp. N,

(g Stirn, Ozellenhécker und Untergesicht sehr lang behaart).

* congoensis Lind, in Bull, Mus. roy. d’Hist. natur. Belg., vol. XIV, No. 54.

6 RUWENZORI EXPEDITION

Eulalia disparina Lindner aff.

Augen etwas behaart. Kopf ganz schwarz, Untergesicht etwas mehr

gerundet wie bei disparina. Farbung und Behaarung von Thorax und Schild-

chen, ebenso das Fliigelgeader wie bei dieser Art. Das Abdomen hat nur zwei

Paare gelber Seitenflecken, die nach innen gerundet sind und die auf den Tergiten

3 und 4 liegen; dazu ist der Seitenrand dieser Tergite und des letzten gelb

gesiumt. Bauch gelb wie bei disparina. p etwas mehr verdunkelt wie bei

dieser Art.

8 mm.

UGANDA: Ruwenzori, Namwamba Valley, 6500 ft., 1 3.

Das Exemplar zeigt groBe Ahnlichkeit mit der von mir beschriebenen

disparina.

Eulalia blastulaefrons sp. n.

Kopf ganz griin, mit schwarzem Ozellenhoécker, etwas verdunkelter Fiihler-

basis und ebensolchen Querfurchen oberhalb dieser. Die Stirn ist durch

eine Langsfurche und drei Querfurchen in 6 stark gewdlbte Segmente geteilt.

Die Mittellangsfurche und die oberste Querfurche schneiden sich im Ozellen-

hécker. Riissel schwarz. Untergesicht stark hervortretend, an den Seiten

etwas silberig behaart. Starker golden ist der Augenhinterrand behaart.

Fithler ziemlich schlank; 1. Glied wesentlich langer als das 2., schwarz, 2. rost-

gelb, 3. schwarz. Thorax und Schildchen griin mit schwarzem, anliegend golden

behaartem Mesonotum. Auch die Sternopleural- und Postnotalregion sind

schwarz. p braungelb mit verdunkelten Endtarsen. Fliigel mit 2 m-Asten

aus D. Abdomen griin mit schwarzen Vorderrandquerstreifen der Tergite 2-5.

Bauch griin.

7,5 mm.

UcaAnpDA: Kalinzu Forest (Jackson), 1 9.

Platyna hastata Fabricius

UGANDA: Ruwenzori, Kilembe, 4500 ft.,7 ¢; Kalinzu Forest (Jackson), 2 3.

Platynomyia dimorpha Kertész

UGANDA: Ruwenzori, Namwamba Valley, 6500 ft., 3 ¢ 1 9.

Platynomyia edwardsi sp. n.

Bei dieser neuen Art ist der Geschlechtsdimorphismus derselbe wie bei der

vorigen: Das Abdomen des ¢ ist fast dreieckig, das des 2 rund bzw. flaschen-

formig. Der schéne Silberglanz der ¢ von dimorpha fehlt bei der neuen Art,

- STRATIOMYIIDAE . Fh

alle Individuen sind aber sofort als edwardsi kenntlich an der Anordnung der

goldgelben, anliegenden, nicht sehr auffallenden Behaarung des Mesonotums,

die im vorderen Teil zwei parallele Streifen der schwarzen Grundfarbe frei laBt.

Kopf schwarz, Fihler braun, apikal dunkler, Fiithlerborste schneeweiB,

das Untergesicht wie bei dimorpha an den Seitenrandern und ebenso der

Hinterkopf unten weiBlich behaart. Riissel schwarz. Thorax und Schildchen

schwarz mit anliegender, nicht sehr auffallender Behaarung auf Mesonotum

und Schildchen. # gelblich, Fliigel etwas mehr gebraunt wie bei dimorpha.

Schwinger groB, elfenbeinwei8, mit gelblichem Stiel. Abdomen beim 3

dreieckig, beim 9 rund, flach, schwarz, glanzend, dorsal etwas weniger glanzend,

mit. groben Grubenpunkten und Harchen darin. AuBerdem sind Seiten-,

Hinterrand und Unterseite langer weiBlich behaart.

4-5 mm.

UGanDA: Ruwenzori, Namwamba Valley, 6500 ft.

Argyrobrithes argenteus Grinberg

Ucanpa: Ruwenzori, Kilembe, 4500 ft., 2 &.

Diese von Westafrika und dem Kongogebiet bis Ostafrika verbreitete Art

war aus Uganda bereits bekannt.

Chelonomima notata sp. n.

6. Die Augenfacetten sind sehr groB, die oberen viel gréBer wie die

unteren. Nur die ersten drei bis vier Fihlerglieder sind gelb, die iibrigen

schwarzbraun. Hinterkopf flach, oben schwarzbraun; Cerebrale und

unterer Teil hellgelb. Thorax hellgelb, glanzend, mit zwei breiten dunkel-

braunen Seitenstreifen, die auf die Seiten des Schildchens tibertreten, mit

zwei schmaleren, schwach braunen Mittelstreifen vor der Naht und mit einem

dreieckigen Fleck auf den Pleuren vor den Fliigeln. Metanotum und Post-

notum ebenfalls dunkelbraun. Behaarung des Thorax sparlich, abstehend.

p hellgelb, mit Ausnahme der schwarzbraunen Tarsen und #3. ¢3 in der Mitte

der AuBenseite und distal davon in Form eines schmalen Streifens hellgelb.

Auch. f2 auBen braun. Fliigel farblos, durchsichtig; Adern dunkelbraun mit

Ausnahme der farblosen m-Aste und cur, distal der D, sowie der an, die nur an

der Basis ein kurzes Stiickchen dunkelbraun, dann farblos ist. Stigma schwach

braungrau. Schwinger grau mit hellgelbem Stiel. Abdomen hellgelb; das 4.

und 5. Tergit dunkelbraun, nur an den Seiten gelb. Behaarung des Abdomens

lang, abstehend, weiBlich, sparlich.

5,5 mm.

UGANDA: Ruwenzori, Bwamba Pass (West side), 5500-7500 ft., 14.

Enderlein errichtete 1914 diese Gattung mit der westafrikanischen Ch.

8 RUWENZORI EXPEDITION

partiticeps und zwar beschrieb er nur das 9. Man k6nnte versucht sein, in der

neuen Form das ¢ dazu sehen zu wollen. Es liegen mir gleichzeitig 3 von

partiticeps vor, die sich doch sehr wesentlich von dem neuen unterscheiden.

Tinda nigra Macquart

UGANDA: Ruwenzori, Kilembe, 4500 ft., 3 3.

Aspidacantha aethiops sp. n. (Fig. 1)

Das Stiick zeigt sehr groBe Ahnlichkeit mit atva Kert., unterscheidet sich

aber u.a. durch die p-Farbung und die andern Proportionen im Fliigelgeader.

Ich halte das Stiick fiir ein 9, wenn auch die Stirnbreite fiir ein solches etwas

gering ist; sie betragt etwa 1/7 der Kopfbreite; Kertész gibt fiir atra 1/10

der Kopfbreite fiir das 3 an.

®. Stirn glanzend schwarz, in der unteren Halfte mit einer Langsfurche.

Wangen an den Augenrandern mit weiBlicher Pubeszenz. Filer ganz hellgelb.

Abb. 1.—Aspidacantha aethiops sp. n.

Thorax und Schildchen schwarz, etwas porig. Mesonotum silberig behaart,

besonders an den Seiten vor der Quernaht, langs dieser, vor ihr und vor dem

Schildchen. Dieses oben flach, unten etwas gewélbt und am Ende mit einer

ziemlich scharfen Spitze. Es ist die Form der Dornen, die sich bei sehr vielen

afrikanischen Stratiomyiiden findet und die man mit der Brust einer Negerin

vergleichen kénnte. Der obere flache Teil des Schildchens ist etwas glanzend,

kaum behaart, und etwas porig, der untere Teil und die Seiten sind mit dicht ste-

henden Stiftchen bestanden, die kurze Harchen tragen. # fast ganz gelblich, nur

mit schwach angedeuteten braunlichen Ringen. Fliigel am Vorderrand vor dem

gelblichen Randmal mit einer deutlichen wolkigen Braunung, die an dieser

Stelle, c, sc und vz erfaBt und auch die Az erfiillt; sonst farblos mit gelblichen

Adern. v4-+5 ist verhaltnismabig lang ; somit ist das Verhaltnis der Randader-

abschnitte 5, 6, und 7 ungefahr 1: 0:1 (keinesfalls wie bei atva 12:0: 27).

2,5 mm.

UcanpDA: Budongo Forest, I @ (?).

Nach der Festellung dieser neuen Art, die ich fiir nicht identisch mit A. atra

STRATIOMYIIDAE 9

Kert. halte, glaube ich, da8 auch friiher von mir als A. atva bestimmte Tiere

aus S. Rhodesia, die etwas robuster sind als die vorliegende Art eine andere

Art sind.

Aspidacantha atra Kertész

In diesem Stiick glaube ich das bisher unbeschriebene 2 zu A. atra Kert.

sehen zu diirfen, wenn auch das Fliigelgedder in seinen Proportionen sich nicht

ganz mit der Zeichnung deckt, die Kertész davon gibt.

Q. Die Stirn nimmt fast 1/3 der Kopfbreite ein; sie ist glanzend schwarz.

Der Ozellenhécker tritt ziemlich stark hervor. Die beiden Fiihlerbasalglieder

sind klein, gelblich, das verhaltnismabig groBe 3. Glied ist braungelb mit

dunkler Borste. Behaarung wie beim 3. p gelblichwei8, die f2 und /3 mit

breiten braunen Ringen in der Mitte. f7 in der Mitte nur mit schwacher

Verdunklung. Von den gelben Adern ist nur die Basis von rz vor dem Randmal

dunkel.

2,5 mm.

UGANDA: Ruwenzori, Namwamba Valley, 6500 ft., I 9.

Neopachygaster africana sp. n. (Fig. 2)

6. Kopf schwarz. Stirn am unteren Ocellus am schmalsten, etwa 1/10

Kopfbreite, gegen die Fiihler breiter. Fiihler deutlich tiber der Mitte des Kopf-

profils. Behaarung nur sehr sparlich, oben dunkel, unten hell; neben den Augen

Abb. 2.—Neopachygastey africana sp. n.

feine weiBe Rander auf den Wangen. Fiihler braun, in der Mitte (2. und Basis

des 3. Gliedes) gelblich; Fiithlerborste gelblich. K6rper schwarz, Mesonotum

und Schildchen sparlich, anliegend, goldgelb behaart. Auf den Mesopleuren

nur ein Biischel silberwei8er Haare. Schildchen ziemlich flach, in einem stump-

fen Winkel zur Prascutellarflache. Abdomen rund, etwas breiter als der Thorax,

mit nicht auffallender gelblicher Behaarung. # samt Hiiften gelblich, die / vor

dem Knie wenig dunkler. Fliigel leicht grau, Randmal gelb, Adern braun,

Schwinger schmutzigwei8.

Io RUWENZORI EXPEDITION

9. Stirn fast von 1/3 Kopfbreite, glanzend schwarz. Schwingerknopf mit

einem braunen Fleck an der Wurzel. Sonst vom ¢ nicht verschieden.

3,5-4 mm.

Ucanpa: Ruwenzori, Namwamba Valley, 6500 ft., 2 3, 2 9 (incl. type 3) ;

Kilembe, 4500 ft., 1 2.

Die Bestimmungstabelle Kertész fiihrt auf Neopachygaster Aust. und zwei-

fellos ist der Platz fiir diese neue Form auch ganz in der Nahe, wenn sich auch

der Habitus nicht ganz mit der europaischen Gattung deckt. Die Afrikanerin

ist schlanker, auch hinsichtlich der Fliigel und Fihler. Es widerstrebt mir

aber unndtigerweise neue Gattungen zu schaffen. Besonders hervorgehoben

zu werden verdient eine Bildung an den Fiihlern, die der Tendenz der Streckung

dieser Form entspricht. Es ist ein kleiner gliedartiger FuB, auf dem jeder Fiihler

sitzt. Kertész hat ihn auch fiir Abiomyia erwahnt. Er ist so deutlich ent-

wickelt, daf man versucht sein kénnte von 3 Basalgliedern zu sprechen!

Ein weiteres 2 von Budongo Forest, 7—8.xi.35, hat dunkle Basalglieder der

Fithler und helles 3. Glied.

Himantochaeta gen. n.

_ Eine Gattung aus der nachsten Verwandtschaft Neopachygaster Aust., die

viel Ahnlichkeit mit der vorhergehend beschriebenen Art dieser Gattung zeigt.

So findet sich bei ihr auch das dort erwahnte Merkmal des gliedfo6rmigen Fusses,

auf welchem das erste Fiihlerglied aufsitzt. Zur Aufstellung einer neuen

Gattung zwingt aber die riemenformige Endborste des Fiihlers, die eine nahere

Verwandtschaft mit Argyrobrithes und Gattungen, die sich um diese gruppieren,

verraten, Formen mit spindelf6rmigem Komplexglied. Bei der neuen Gattung

ist das Komplexglied aber langlichrund, seitlich zusammengedriickt.

Der Kopf ist ziemlich hoch und breit. Thorax, Abdomen und pf wie bei

Neopachygaster africana! Das Schildchen ist etwas aufgerichtet und ziemlich

spitz endend, am Rande mit zahlreichen Kornchen.

Himantochaeta cultellata sp. n. (Fig. 3)

§. Kopf schwarz. Stirn etwa von 1/8 Kopfbreite. Ozellenhécker ziemlich

hoch. Die beiden ersten Fiihlerglieder ziemlich klein, das 2. innen etwas vor-

gezogen; alle drei Glieder des Fiihlers braun, innen gelblich. Fiihlerborste

riemenformig, etwas langer wie die Fiihlerglieder zusammen, schwarzbraun.

Wangenrander weiblich feinhaarig. Thorax und Schildchen schwarz, mit an-

liegender, unscheinbarer, gelblich oder weiBlich glanzender Behaarung, die vorne

Spuren von zwei Langsstreifen freilaBt und an der Schulter etwas langer und

mehr glanzend ist. Die glanzend schwarzen Pleuren tragen auf den Mesopleuren

silberweibe Behaarung in Form eines Streifens, der einen gegen die Fliigelwurzel

STRATIOMYIIDAE DEE

gedfineten Winkel bildet. Fliigelgeader wie bei Neopachygaster. Rr schmal,

das Randmal wie die Adern gelblich, nur vz vor dem Randmal braun. Schwinger

braunlichgelb.

Abb. 3.—Himantochaeta cultellata gen. et sp. n.

Das 9 unterscheidet sich nur durch die breitere Stirn (etwa 1/3 Kopfbreite)

vom 3.

3,5-4 mm.

UcanpDA: Ruwenzori, Namwamba Valley, 6500 ft., 2 dr 9.

Drosimomyia mercurialis sp. n.

3g. Die Beschreibung pa8t ganz auf die Angaben Kertész’, bis auf die fol-

genden Punkte.

Der Komplex des 3. Fiihlergliedes ist nicht rotlichgelb, sondern dunkelbraun

und kontrastiert dadurch lebhaft mit den hellgelben Basalgliedern. Mesonotum,

Schildchen und Abdomen sind fein silberig glanzend, allerdings so, daB davon nur

bei bestimmtem Lichteinfall etwas zu sehen ist; andernfalls erscheint z.B. das

Abdomen vollkommen samtschwarz, mit Ausnahme der sparlichen, langeren,

abstehenden, weiblichen Behaarung. Hiiften und # gelblich. Fliigel mit

obiger Ausnahme wie von Kertész fiir natalensis angegeben. Schwinger weiB.

2,8 mm.

UGANDA: Ruwenzori, Namwamba Valley, 6500 ft., 1 gd (?).

Zweifellos eine Drosimomyia, wenn auch Kertész in seiner Gattungsdiagnose

angibt, da8 ,,der Hinterast der Radialis‘‘ (= r4) fehlt. Bei dem prachtigen

vorliegenden Stiick ist 74 aber auf beiden Fliigeln deutlich vorhanden, wenn auch

die Neigung zur Riickbildung in verschiedenem Masse auf beiden Fliigeln

wahrnehmbar ist. Die Diagnose Kertész mtiSte somit erganzt werden: ,,74

fehlt gewohnlich“ oder ,,74 fehlt bei Stiicken aus Natal, ist aber bei nérdlicher

beheimateten -- vorhanden. ‘‘

Das Stiick vom Ruwenzori diirfte ein ¢ sein.

2. RHAGIONIDAE, TABANIDAE, ASILIDAE,

BOMBYLIIDAE

By H. OLproyp, M.A. yr+

(With Plates I and IT)

THE material dealt with in this paper comprises all the Brachycera-

Orthorrhapha collected by the Ruwenzori Expedition, excepting the families

Stratiomyiidae—already reported upon by Dr. Lindner—Empididae and

Dolichopodidae. Unless it is otherwise stated, all the specimens mentioned

below were collected by Dr. F. W. Edwards, and are deposited in the British

Museum.

RHAGIONIDAE

The family Rhagionidae is very poorly represented in collections of African

Diptera. Bezzi (Ann. S. Afr. Mus. 1926 xxiii : 287—324,) was able to list only

nine Ethiopian species, placed in three valid genera, to which he added thirteen

species, and with later additions the total now stands at thirty species and

seven genera. These are:

VERMILEONINAE

Lampromyia

appendiculata Bezzi, 1926: 301 : : ; : . ‘Ceres, Cape

argentata Bigot, 1885, Ann. Soc. Ent. Ryance (6) v, Bull.: 68 1 lex River

brevirostris Bezzi, 1926: 303. ’ ; ; : Zululand

pilosula Engel, 1929, Ann. Transv. Mus. xili: 172. Mira North, Cape

pilosula flavida Engel & Cuthbertson, 1937, Trans. Rhodes. Sci.

ASSES 3 5e.2) : . S. Rhodesia

sericea Westwood, 1876, WEG Bae Soc. Stondhs ow . Damaraland, Cape

CHRYSOPILINAE

Chrysopilus

cricosphaerota Speiser, 1914, Deutsch. Ent. Zeitschr.: 4. . Cameroons

fulvidus Bigot, 1891, Ann. Soc. Ent. France (7) I: 370. : Abyssinia

incidens Curran, 1927, Rev. Zool. Afr. 15: 95 . : : . Cameroons

II 2

I4 RUWENZORI EXPEDITION

obscuripes Speiser, 1923, Wien. Ent. Zeit. 4o: 98. 3 s Ethiopia

testaceus Loew, 1858, Ofvers. Kongl. Vet. Akad. Forh. 1857, 14:

367; and 1860, Dipt.-Fauna Sudafr. 1: 172 : : : Caffraria

tuckert Bezzi, 1926: 320 : é : : : . Humansdorp, Cape

RHAGIONINAE

Atherix

androgyna Bezzi, 1926: 314. . ; ; : ; Tulbagh, Cape

barnardi Bezzi, 1926: 313 : : : Caledon Div., Cape

disciclara Speiser, 1914, Deutsch. BAe sie Sete 3 . Cameroons

incompleta Bezzi, 1926: 315. : : : : . Paarl, Cape

peringueyt Bezzi, 1926: 311. ; ; : . crallcnbes on Cape

Suragina

agramma Bezzi, 1926: 306. . Barberton, Transvaal

bezzat Curran, 1928, Bull. Amer. vere Nai Hist 58: 172 . Bengamisa, Congo

binominata Bequaert, 1921 (nom. nov. for longipes Loew, 1863,

Wien. Ent. Monat. 7: 12, nec Bellardi, 1861). Bloemfontein, Orange F. S.

bivittata Bezzi, 1926: 308 F ; E Natal and Transvaal

dimidiatipenmis Brunetti, 1929, ee Mag: Nat. Hist. (10) 4: 3

Kampala, Uganda

imaequalis Bezzi, 1926: 307. ; ; : 2 . Karkloof, Natal

monogramma Bezzi, 1926: 305 : : : Zululand

nigromaculata Brunetti, 1929, Ann. Mag. Nat. Hist. (1 OVAEs

Saw-mills, Rhodesia

pilitarsis Lindner, 1925, Konowia 4: 22 . : : : 2 Gaboon

varicolor Brunetti, 1929, Ann. Mag. Nat. Hist. (10) 4: 2 Kampala, Uganda

Pachybates

braunst Bequaert, 1921, Psyche 28:1. : ‘ Stellenbosch, Cape

Atherimorpha

albipenmis Bezzi, 1926: 318. : : : ; ; Caledon, Cape

ARTHROTELINAE

Arthroteles

bombyliiformis Bezzi, 1926: 322 5 ; . . Clanwilliam Div., Cape.

RHAGIONIDAE 15

‘Contrasting this with the seventeen genera and one hundred and fifty species

of the Palearctic Region we see the extreme paucity of the Rhagionid fauna of

Africa, a paucity which is also reflected in the number of species described or

recorded from single specimens. The very considerable variation which may

be found in one species, coupled with the difficulty of obtaining adequate series,

makes the placing of single specimens difficult, especially in such groups as the

testacea group of Chrysopilus.

The list of genera is an interesting one, most of the species belonging to the

four genera Lampromyia, Chrysopilus, Suragina (Atrichops), and Atherix. The

predominance of Suvagina is a feature which the African fauna shares with

that of the Orient, while the entire absence of Rhagio from the list is noteworthy.

There are, however, in the British Museum three unnamed specimens from

S. Africa (Pondoland and Zululand) which appear to belong to this genus.

The present collection consists of eleven specimens, to which are added a

few specimens standing unnamed in the Museum collection. Five species are

represented, of which three are here» described as new.

I wish to express my gratitude to Dr. A. J. Hesse and the authorities of the

S. Africa Museum, Cape Town, who very kindly lent me for study the types of

the species described by Bezzi (1926).

Suragina Walk.

Suvagina Walker, 1860, Journ. Proc. Linn. Soc. London. 4: 110. (Type—illucens

Walk., 1860, monotypic.)

? Atvichops Verrall, 1909, British Flies, 5: 291. (Type: Atherix crassipes Meig., 1830,

by original designation.)

Malloch (1932 Stylops, 1: 113) has given an account of the characters which

establish this as a valid genus, distinct from Atherix Meig., and examination of

Walker’s type in the British Museum confirms Malloch’s remarks in every

particular. This genus appears to absorb all the Ethiopian and Oriental

species described under Atrichops Verr.as well as a number of those placed under

Atherix, but whether Atrichops crassipes Meigen, the type species, is a Suvagina

or not is a moot point. There is the same bare, shining appearance, and the

same hind-coxal spur, but the width of the frons and the position of the ocelli

in the female are of the Atherix type.

Suragina falsa sp. n.

A brightly coloured species, with mesonotum largely black, abdomen largely

orange, and hind femora black-ringed in the female.

Q. Head: face, lower half of frons, and vertex with grey tomentum, upper

half of frons velvet-black. Antennae orange, first and second segments a little

dusky, with black hairs, third bright, with arista black. Palpi largely reddish

with reddish hairs.

16 RUWENZORI EXPEDITION

Thorax: humeri and areas round spiracles shining yellow. Central stripe

grey-dusted, does not extend laterally beyond lines of dorsocentrals; on each

side of this stripe two black spots, presutural large, uniting in front with central

stripe, but not filling angle of transverse and notopleural sutures, postsutural

spot small, leaving considerable orange area above wing and in front of scutellum.

Scutellum bright yellow on margin, obscurely blackish basally. Pleura largely

yellow except meso- and sternopleura and a little of lower pteropleuron, which

are blackish-grey. Metapleuron yellow, grey-dusted, with pale hairs. Meso-

phragma brown in middle, yellow at sides.

Abdomen: first three segments have a dark brown median stripe, and

second and third have also narrow, ill-defined lateral stripes; fourth and fifth

segments indistinctly darkened in middle line, while sterna of third and fourth

segments are indistinctly blackened. Short dorsal hairs black, longer lateral

and ventral hairs yellow.

Legs: coxae yellow, middle pair blackish in front and on inner surface, with

black hairs. Fore and middle femora yellow, with pale hairs, first pair having

a few black hairs above at tip. Hind femora yellow at base and tip, very broadly

black in middle. Middle tibiae and first two tarsal segments yellow with black

hairs; fore and hind tibiae and tarsi entirely black.

Wings: yellowish brown, slightly darker at tip, and with a post-stigmal

brown band.

Length of body, 9 mm.; of wing, 9 mm.

RUWENzORI: Kilembe, 4500 ft., Type 9.

This species is very close to Atherix pilitarsis Lindner from Gaboon, which

the author compares with A. longipes Loew (= binominata Beq.), and which is

therefore presumably a Suvagina. It differs from Lindner’s description in

having the sides of the thorax orange, especially above the wing-bases, and in

the slightly different abdominal pattern. This species also somewhat resembles

S. inaequalis Bezzi from Natal, but the latter shows much more markedly the

single median stripe, as in monogramma Bezzi, and moreover has the black-

ringed hind femora only in the male.

Three female paratypes show something of the variation of this species.

One from the same place as the type has the proboscis and palpi bright orange,

and the middle coxae scarcely darkened, almost without black hair. A female

from the Namwamba Valley, 6500 ft., has the outer side of the palpi and the

tip of the proboscis black, with black hairs, the median dorsal stripe on the

thorax pointed at its front end, and the black area of the hind femora much

extended. The wings, too, are almost uniformly brown. The remaining female,

from the same locality as the last-named, has similar features, except that the

cells near the wing-tip have clearer centres, the brown colour being distributed

along the veins. None of these three specimens shows at all clearly the median

dorsal stripe of the abdomen.

RHAGIONIDAE 17

Chrysopilus Macq.

Chrysopilus Macquart, 1826, Rec. Soc. Agric. Lille, 1826: 403. (Type: Rhagio aureus

Meigen, 1804, by designation of Westwood, 1840, as R. diadema F.)

Chrysopilus testaceus Loew

Chrysopilus testaceus Loew, 1858, Ofvers. Kongl. Vet. Akad. Forh. 14, 1857: 367.

One male from Ruwenzori, Mobuku Valley, 4500 ft., which I refer to this

species, though the stigma is not so short as descriptions would suggest, while

the four last abdominal segments show some black colouration. The peculiarly

long base to the second posterior cell is well shown.

A second male from Kilembe, 4500 ft., seems to fall within the range of

variation of this species.

Chrysopilus bisectus sp. n. (Fig. 1, a)

A distinctive species, at once recognizable by the creamy-yellow first and

second abdominal segments, which contrast sharply with the chocolate brown

of the rest of the abdomen.

6. Head: face, proboscis, palpi and antennae brown, epistoma and second

antennal segment only a little lighter in colour than the rest. Lower occipital

hairs black.

Thorax: uniformly light chocolate brown. Dorsally with a fairly thick

covering of greenish yellow pile, metapleural and mesophragmal hair-tufts thick

and yellowish white. (Mesonotum of type is entirely denuded, and pilosity is

described from paratype from Tiriki.) Halteres yellow-stalked, black-tipped.

Abdomen: ground colour of first two tergites—except sides of first, which

are brown—and first three sternites creamy yellow, rest of abdomen chocolate

brown. Hairs mainly concolorous with ground colour, though sparse black

ones are present on all sternites.

Legs: coxae and trochanters chocolate brown. Femora pale yellow with

yellow hairs, hind pair a little brownish towards tip, with brown hairs. Tibiae

and tarsi pale, tarsi darker beyond first segment.

Wings: entirely hyaline, except for stigma which is long and acute apically,

though not quite filling end of marginal cell (Fig. 1A).

Length of body, 6 mm.; of wing, 6°5 mm.

RUWENZORI: Kilembe, 4500 ft., 1 g. Type.

Kenya: Tiriki, N. Kavirondo, 5200 ft., 20.v.1g11 (S. A. Neave), 1 3. Para-

type.

NaTAL: Karkloof, Feb. 1897 (G. A. K. Marshall), 1 g. Paratype.

PONDOLAND: Port St. John, Nov. 1923 (R. E. Turner), 2 J. Paratypes.

This species stands very near to C. cricosphaerota Speiser. Characters which

do not accord with Speiser’s description include: the elongate stigma, and the

II, 20

18 RUWENZORI EXPEDITION

absence of any trace of a brown band between the stigma and the fork of R4+5,

or even of a brown tip to the wing; the very conspicuous creamy colour of the

base of the abdomen, which is poorly conveyed by Speiser’s expression “‘aus-

gesprochen gelbbraun”’; the yellowish white abdominal hairs of cricosphaerota

are certainly conspicuous on the first two segments, but beyond this are replaced

by black ones; and the knobs of the halteres are entirely black, without the

black ring which Speiser makes a key character.

Chrysopilus sp.

Differs from the preceding species in the entirely dark brown dorsum of the

abdomen, the creamy base being represented only by a lightening of the two

Fig. 1.—Wings of (a) C. bisectus, sp. n.; (b) C. lateralis, sp. n.

basal sternites. Dorsally the abdomen, although rubbed, shows traces of

golden pile on all segments. The proboscis is entirely pale yellow, palpi black,

lower occipital hairs pale. Wing similar to that of the preceding species, but a

little browned at tip.

RuWENzorI: Namwamba Valley, 6500 ft., 1 3.

Chrysopilus lateralis sp. n. (Fig. 1, b)

A very distinct species, easily recognized by the conspicuous dark brown

RHAGIONIDAE t9

band which runs across the upper half of the pleura and along the length of the

abdomen.

§. Head: dark brown, with greyish tomentum. Proboscis and palpi pale

yellow. Antennae with first two segments brownish yellow, third segment

and arista dark brown.

Thorax: mesonotum dark brown with yellowish stripes, a few fine black

bristles, and a thin covering of greenish yellow pile. Scutellum similar, marginal

bristles black. Mesopleuron and upper part of pteropleuron chocolate brown,

forming part of a brown horizontal stripe which runs whole length of thorax

and abdomen; lower half of pleura, and coxae pale yellow. Scanty pleural

hairs yellow. Halteres yellow-stalked with brown knob.

Abdomen: tergites dark brown, testaceous on hind margins and at sides.

A few black hairs, especially noticeable on terminal segments, and yellow pile.

Brown stripe of thorax is continued along lateral suture of abdomen, and bears

long, rather sparse black hairs. Venter pale yellow to third segment, brown

beyond, with sparse black hairs.

‘Legs: pale yellow, only tarsi becoming blackish towards tips. Hind femora

with a cluster of black scales above at tip.

Wings: practically hyaline, only a faint infuscation around tips of veins.

Stigma short and sharply defined, leaving a clear area in tip of marginal cell.

Base of posterior cell rather shorter than that of third posterior cell. (Fig. 1B).

9. Closely resembling male. Segments forming ovipositor (5-7) pale yellow.

Base of R4 which is always sharply angled, may bear an appendix.

Length of body, 8 mm.; of wing, 7 mm.

RUWENZORI: Namwamba Valley, 6500 ft., 1 g. Type.

Ucanpa: Namanve, 9.12.1934 (J. Ford). 19. Allotype.

RUWENZzORI: Namwamba Valley, 6500 ft., 1 $; Kilembe, 4500 ft., 1 3.

Paratypes.

UcanpDA: Namanve, 9.12.1934 (J. Ford), 2 3, 3 9; Kampala, 3.x11.1934

(G. H. E. Hopkins) x 2 [in Imp. Inst. Coll.].. Paratypes.

TABANIDAE

The present collection of Tabanidae is not an extensive one. The eighty-six

specimens represent twelve species, of which three belong to the genus Tabanus

(sensu lat.) and the others to Chrysozona; the subfamily Pangoniinae is un-

represented.

The species which make up this collection were described or have been

recorded from the mountains of Kenya, Uganda, or the eastern boundaries of

the Congo. The main item of interest is the occurrence of a new species of

Chrysozona at a high altitude on Mt. Elgon.

The useful keys given by Bequaert (1930, Medical and Economic Ento-

mology in Strong, Reps. Harvard Exped. Liberia & Belgian Congo : 797-1001),

include many of the species occurring in this part of Africa.

Tabanus Linn.

Tabanus Linnaeus, 1758, Syst. Nat. Ed. X: 601. (Type: T. bovinus Linn., by desig-

nation of Latreille, 1810).

Tabanus (Tabanus) secedens Walk.

Tabanus tibialis Walker, 1848, List. Dipt. Brit. Mus. 1: 162 (nec. Macq., 1845).

Tabanus secedens Walker, 1854, List. Dipt. Brit. Mus. 5, suppl. 1: 224

UcanpDa: Kalungi Swamp, 12.xi.34, I 9.

Bequaert (1930: 938), has given the full synonymy of this species. He

states that the solitary record for Tanganyika given by Austen (reporting on the

Tabanidae collected by the Swedish Expedition to Central Africa in 1921) was

based on an error of locality, and that although common and widely distributed

in West Africa and the Congo, 7. secedens does not occur in East Africa proper.

Tabanus (Therioplectes) ruwenzorii Ric.

Tabanus vuwenzorii Ricardo, 1908, Ann. Mag. Nat. Hist. (8) 1: 332.

RuWENzoRI: Namwamba Valley, 6500 ft., 6 9.

The species was described from E. Ruwenzori, 5000-13,000 ft. Bequaert

(1930: 916), says: “This species is known only from Ruwenzori, the nearby

Mpanga Forest in Uganda, and Ankole, Uganda. It is decidedly a mountain

form, occurring at altitudes between 5500 and 7000 ft.”’

Tabanus (Sziladynus) sp.

RUWENZORI: Bwamba Pass (West Side), 5500-7500 ft., I 9.

This specimen differs from 7. muluba Beq., in the much smaller tooth of

the third antennal segment, in the united frontal callosities, and in the absence

of longitudinal rows of spots on the abdomen. It has some affinities with

T. capensis Macq., but is much less pubescent.

TABANIDAE 21

Chrysozona Mg.

Chrysozona Meigen, 1800, Nouv. Class.: 23 (no species).

Haematopota Meigen, 1803, Ill. Mag. 2: 267. (Type: Tabanus pluvialis Linn., mono-

typic.)

Chrysozona distincta Ric.

Haematopota distincta Ricardo, 1906, Ann. Mag. Nat. Hist. (7) 18: 106, pl. 3, Fig. 6.

Kenya: Aberdare Range, Mt. Kinangop, r0,000 ft., 11 9; Aberdare Range,

Katamayo, 8000 ft., 5 9; Aberdare Range, Nyeri Track, 10,500 ft., 2 9; Mt.

Elgon, Heath Zone, 10,500—11,500 ft., 1 9; Mt. Elgon, Forest Zone, 8500 ft., 1 9;

(all F. W. Edwards).

Mt. Kinangop, 10,000 ft., 5 9; and Nyeri Track, 10,500-11,000 ft., 4 9

(J. Ford).

Described from the Zomba Plateau, Nyasaland, this species is represented

in the Museum collection by specimens from Rhodesia and from several localities

in Kenya, including the Aberdare Mts. (gooo ft.), and the Nandi Escarpment

(5800 ft.).

Chrysozona alluaudii Surc., melan. f.

Haematopota alluaudii Surcouf, 1908, Bull. Mus. Hist. Nat. Paris: 153.

KenyA: Nairobi, x.1934, I 2.

This form, unnamed, was recorded by Edwards (1916, Bull. Ent. Res. 7 (2):

147) from Mt. Mlanje, Nyasaland, and the British Museum collection also in-

cludes a number of specimens from Kenya. The chief characteristics of the

form are the generally blacker appearance, the virtual disappearance of the

median thoracic stripe, and the reduction of the lateral stripes to very fine lines

terminating in a pair of small, but distinct spots.

Chrysozona furva Austen

Haematopota furva Austen, 1912, Bull. Ent. Res. 3: 334, pl. 11.

RUWENZzORI: Kilembe, 4500 ft., 9 9; and Mobuku Valley, 4500 ft.,

S.W. UcAnDA: Kigezi District, Lake Mutanda, 6000 ft., (J. Ford).

Described from Uganda, this species is in the British Museum from various

localities in Uganda and Kenya, from heights of roughly 4000-8000 ft. It has

been taken on Mt. Elgon, but not by the present expedition.

Chrysozona ugandae Ric.

Haematopota ugandae Ricardo, 1906, Ann. Mag. Nat. Hist. (7) 18: 105, pl. 3, Fig. 5.

Ucanpa: Kigezi District, Kanaba, 7800 ft. (F. W. Edwards), 29; Kalinzu

Forest (J. H. E. Jackson), 1 9.

22 RUWENZORI EXPEDITION

Chrysozona hirta Ric.

Haematopota hivta Ricardo, 1906, Ann. Mag. Nat. Hist. (7) 18: 1o1, pl. 3, Fig. 1.

One female from each of the following localities in UGANDA: Kigezi District,

Kanaba, 7800 ft.; Kigezi District, Kanaba Gap, 7500 ft.; Kigezi District, Mt.

Sabinio, 8000 ft.; Fort Portal (all &. W. Edwards); Imatong Mts., 8—go00 ft.

(D. R. Buxton).

The British Museum series of C. hirta consists entirely of East African speci-

mens, but Bequaert (1930: 965), gives several localities in the neighbouring

parts of the Belgian Congo.

Chrysozona (?) sanguinaria Aust.

Haematopota sanguinaria Austen, 1908, Ann. Mag. Nat. Hist. (8) 1: 417.

One male from UGANDA, Kigezi District, Mabungo, 6000 ft. (J. Ford),

may belong to this species, which was described from N. W. Rhodesia, and also

occurs in the Belgian Congo (Katanga District). There are no males in the

British Museum collection.

Chrysozona completa sp. n.

A medium-sized species, closely resembling C. distincta Ric., but dis-

tinguished by the shorter and paler first antennal segment, by the grey stripes

Fig. 2.—Chrysozona completa, sp. n., head.

of the mesonotum being continuous with the median grey area, and by the

whitish hind tibiae,

TABANIDAE 23

9. Head: frons a little longer than wide, narrowing a little to the vertex,

where it is about two-thirds the width of an eye; two large brown spots each,

touching the eye-margin and a very small median spot. Frontal callus occupy-

ing about one-sixth of the frons, parallel-sided, but widened into a small point

in the middle line. Antennae as figured (Fig. 2): first and second segments

pale reddish yellow, third blackish, hairs black. Palpi white, with black and

white hairs.

Thorax: dorsally blackish brown, with grey pattern—a narrow median

line and a pair of thicker lateral lines, uniting behind with a large median area,

which is prolonged over middle of scutellum. Pleura grey, a little brownish

on meso- and sternopleura. Halteres brownish yellow, pale yellow at tip.

Abdomen: dorsally dark brown, segments with very distinct grey hind-

margins, and from second onwards with a pair of large grey spots. Venter grey,

Fig. 3.—Chrysozona completa, sp. n., wing.

with each segment yellowish basally. Abdominal hairs yellow, both dorsally

and ventrally.

Legs: forelegs—coxae grey basally with white hairs, brownish apically,

with black hairs; femora brownish, paler in middle below; tibiae brownish,

paler at base and in front; tarsi brown, pale at base. Middle legs—coxae

brownish; femora whitish, brown only at tip; tibiae dark brown at knee, other-

wise pale brown, with two indistinct paler rings; tarsi brown, paler at base. Hind

legs—coxae grey with white hairs; femora whitish, a little browned above;

tibiae brown, with one fairly distinct pale ring, and a poorly defined lower one,

the whole rather whitish-dusted; tarsi brown, whitish at base.

Wing: see Fig. 3. ;

Length of body, 9 mm.; of wing, 8 mm.

g. Closely similar to the female in most respects, but generally more pilose;

third antennal segment is relatively shorter, and first is moderately swollen and

paler, with numerous long black hairs, which are longer and more silky than

in the female. Both the colour and the length of the first antennal segment

are rather variable, and in some specimens it is quite short and almost black.

The wing-markings are similar in position to those of the female, but the pale

24 RUWENZORI EXPEDITION

areas are usually smaller; in both sexes there is some slight variation in

pattern along the hind margin, especially in the third posterior cell.

Kenya: Mt. Elgon, Heath Zone, 10,000-11,500 ft. 1 2 Type, 1 ¢ Allotype,

7 9 and 9g ¢ Paratypes.

Ucanpba: Mt. Elgon, Bulambuli, 9500 ft. (J. Ford), 1 2 paratype.

It is noteworthy that the males of this species taken should outnumber

the females.

There is a single female from the Alpine Zone (12,000-13,000 ft.), on Mt.

Elgon which differs from the above species in having the frontal callus very

broadly expanded in the middle, and the brown spots much larger, so that they

almost fill the angles between the callus and the eyes. Two males from this zone

might be associated with this female, though no very clear difference is apparent

between them and the males of completa; unfortunately they are both greasy.

In addition to those named above there are in the collection the following

specimens of Chrysozona species which I have not been able to name, but which

I prefer not to describe as new until better series are available:

1. RUWENzoRI: Nyamgasani Valley, 6000-go00 ft. (D. R. Buxton), 2 &.

The extensive pale areas of the wing rather resemble the figure of C. avida

Speiser, from Kilimandjaro, but the rather long, uniformly swollen first antennal

segment and the single ring on the hind tarsi distinguish the species.

2. RuweENzor1: Mpanga Valley, 6000 ft., 1 9; and Bwamba Pass (West

Side), 6500-7500 ft., I 2.

Distinguished by thoracic markings—a single median grey line along the

whole length, including scutellum, and on each side a wide grey line ending in

a grey spot near suture—and by the extensive yellow pubescence on thorax,

abdomen, and on the (black) first antennal segment. Hind tarsi with one pale

ring.

3. RuweEnzor1: Kilembe, 4500 ft., 1 3.

Differs from the male of C.? sanguinaria Austen in the longer and more

swollen (pale) first antennal segment ; the longer second palpal segment ; the

darker wing, with more distinct pale areas; and the darker legs. The male

of C. furva Austen, of which females were taken at Kilembe, is much blacker

in general ground colour, with antennae entirely black.

ASILIDAE

The terrain covered by the present expedition invites comparison with that

of the Swedish Zoological Expedition to Kilimandjaro and Meru in 1905-6,

which was led by Prof. Dr. Ynge Sjéstedt. The Asilidae from that expedition

were reported upon by Speiser (Wissenschaftliche Ergebnisse der schwedischen

zoologischen Expedition nach dem Kilimandjaro, dem Meru, und den umgebenden

Massaisteppen Deutsch-Ostafrikas, 10 (4), 1910). The following is a comparative

list of the Asilidae taken by the two expeditions:

RUWENZORI EXPEDITION

Leptogaster entebbensis sp. nov.

Euscelidia artaphernes Speis.

as lucida, sp. nov.

Ms sp.

Stichopogon punctum Lw.

Neolaparus trifasciatus sp. nov.

Laxenecera albicincta Lw.

gs auricomata Herm.

Proagonistes praedo Austen

Alcumus taeniopus Rond.

Bactria wollastont Hobby

», metoxa, sp. nov.

» Uugandiensts Ric.

Neolophonotus porcellus Speis.

‘i elgon, sp. nov.

Neomochtherus unctus, sp. 1.

Neowtamus africanus Ricardo

Machimus ugandiensis Ricardo

ss sp.

ae (Tolmerus) juxta, sp n

A is gymnus, sp. N.

Ommatius? canicoxa Speis.

i ? chiastoneurus Speis.

. dasypogon, sp. N.

ai macroscelis Bezzi

KILIMANDJARO-MERU EXPEDITION

Leptogaster stugmaticalis Lw.

5 artaphernes Speis.

a pictipenmis Lw.

in nememusha Speis.

a agrionina Speis.

/Holcocephala caligata Speis.

Neolaparus ophion Speis.

Ks holotaenia Speis.

Laxenecera albicincta Lw.

. apifornis Walk.

7 dasypoda Speis.

5 scopifera Speis.

Proagonistes athletes Speis.

Ancylorrhynchus hylaeiformis Speis.

5 nyukinus Speis.

Gontoscelis submaculatus Speis.

phacopterus Schin.

13 xanthopogon Speis.

Hoplistomerus zelimina Speis.

Lamyra gulo Loew.

Tolmerus pammelas Speis.

Machimus caudiculatus Speis.

s penicillatus Speis.

Dysmachus porcellus Speis.

Alcimus tristrigatus Lw.

Heligmoneura monobia Speis.

Promachus gossypiatus Speis.

chalcops, Speis.

3 binucleatus Bezzi

Ommatius chiastoneurus Speis.

”

venator Speis.

Genera 13; species 25; new species 9. Genera 15; species 31; new species 23.

Species common to both lists, 4.

26 RUWENZORI EXPEDITION

The genera included in the two lists are very similar, the only notable

difference being the absence from the Ruwenzori Expedition list of such genera

as Ancylorrhynchus, Gonioscelis and Hoplistomerus—particularly Hoplistomerus,

for, although the localities of the long series of H. nobilis Lw. in the British

Museum suggest that this species does not range so far north, the six other

species all include E. African specimens, and H. zelimina Speiser was decribed

from the “‘Obstgartensteppe’’ on Kilimandjaro. Seasonal variation may

account for this absence, as most species of this genus in the British Museum

seem to occur from March onwards.

The collection is very definitely Ethiopian in character, the only Palae-

arctic affinity being perhaps that shown by Machimus (Tolmerus) gymnus,

sp. n., which, it will be noted, was taken at over 10,000 ft.

I am indebted to Mr. J. F. Shillito for allowing me to study a number of

specimens collected by him in some of the localities covered by the Expedition;

to Prof. G. D. Hale Carpenter for permission to borrow the types of several

species of Ommatius described by Bigot; and to Dr. B. M. Hobby for much

helpful advice, especially on the genus Bactria.

Unless it is otherwise stated, all the specimens mentioned in this paper

were collected on the Ruwenzori Range by Dr. F. W. Edwards during the

winter of 1934-5, and are deposited in the British Museum.

LEPTOGASTERINAE

Pronotum with a median bifid projection, which is visible between the paired protuber-

ances of the mesonotum; second posterior cell usually distinctly longer than third.

Euscelidia Westwood.

Pronotum without such protuberance; second and third posterior cells usually subequal.

Leptogastey Meigen.

Leptogaster Mg.

Leptogastey Meigen, 1803, Uligers Mag. f. Insect., 2: 269. (Type: Asilus cylindricus

De Geer, monotypic as tipuloides Fabr. nec Linn.)

Leptogaster entebbensis sp. n.

A small, slender species with a brown ring on the short club of the hind

femora, and with hind tibiae clubbed and brown on the apical half. It falls

into the group containing rufirostris Loew and bicingulata Bezzi.

g. Head: antennae pale yellow, third segment a little darkened, arista

black. Moustache restricted to about four very fine whitish bristles on mouth-

margin. Face with yellow tomentum. Proboscis bright orange, palpi a little

darker, hairs pale. Occipital bristles weak, pale.

Thorax: dorsum black in ground colour, with tomentum bronze above,

whitish at sides, No bare stripes, though there is some trace of darker stripes

ASILIDAE 27

near front margin. Humeri yellow. Ground colour of pleura yellow except

for a dark brown line from wing base to middle coxae. Tomentum whitish.

Abdomen: brown, with bronze tomentum. Hind margins of second, third

and fourth segments broadly yellow. Hairs pale. Terminalia as figured.

(Fig. 6, 7, R).

Legs: coxae orange, with whitish tomentum. Fore and middle legs mainly

yellow, though femora are a little darkened before tip, and tibiae have a light

brown stripe in front; tarsi entirely yellow except tip of last segment, which is

black. Hind femora strongly clubbed on apical third; basal narrow region with

TAMMANY

Fig. 4.—Wings of: (a) Leptogaster entebbensis, sp. n.; (b) Euscelidia lucida, sp. 0.

brown stripes before and behind, club brown, with a yellow ring at its base and

another at tip of femora. Hind tibiae clubbed on apical two-fifths, which is

brown with a yellow ring at its base, and basally with brown stripes before and

behind. Tarsi yellow except for brown last segment.

Wings: greyish, a little darker at extreme tip, and an indistinct stigmal

marking at tip of subcostal vein, but no other brown markings. Venation as

in Fig. 4a.

Length of body, 9 mm.; of wing, 6 mm.

UGANDA: Entebbe, 13.xii.1934, 1 g. Type.

This specimen agrees closely with Loew’s description of vujfirostris from

Caffraria, except in size and in the peculiarities of venation which Loew de-

scribes. Other species of the same group are bicingulata Bezzi, described from

Eritrea, and nememusha and agrionina Speiser which were taken by the

Kilimandjaro-Meru expedition; besides their larger size, and the different leg-

pattern of nememusha all three are stated to have strongly shining areas on the

dorsum of the thorax.

28 RUWENZORI EXPEDITION

Euscelidia Westw.

Euscelidia Westwood, 1849, Trans. Ent. Soc. Lond., 5: 232. (Type: rapax Westwood,

monotypic.)

Euscelidia artaphernes Speiser

Leptogaster avtapheynes Speiser, 1910, Schwed. Zool. Exped. Kilimandjaro-Meru tro

? fepeens datis Walker, 1849, List. Dipt. Mus. 2: 483.

In the present collection one female from UGANDA, Mbarara, 15.xi.1934. Also

in the British Museum from various localities in E. AFRICA, ABYSSINIA, and

from Zomba, NYASALAND (Hf. S. Stannus).

Speiser pointed out that his new species from Kilimandjaro stood near datis

Walker, and indeed I can see no specific difference between the specimens now

before me and Walker’s type. It is very regrettable that Walker’s type should

have lost the abdomen and both hind legs, since Walker writes: “‘ Hind thighs

striped with black on each side; hind shanks piceous at the tips.’’ On the other

hand Speiser’s species, like the nearly related rapax Westwood, has a black ring

at the base of the clubbed part of the hind femora. In view of this discrepancy,

I do not feel justified in giving Walker’s name precedence.

E. rapax Westwood—of which, by the kindness of Prof. Carpenter, I have

been able to see the type—is very similar to this species, and when more

material is available the two may prove to be forms of the same species. E. vapax

has the hind femora more conspicuously hairy, brighter orange, and with rather

smaller black band, while the terminalia of a male in the British Museum

which agrees with the type in these particulars show some minute differences

from those of artaphernes.

The two following species are remarkable for the clear-cut thoracic pattern,

the mesonotum being shining red, patterned in thick yellow tomentum. The

dorsal aspect of the thorax in the two species is shown in Fig. 5.

Euscelidia lucida sp. n.

3§. Head: face with yellow tomentum. Moustache with about six pale

bristles, confined to mouth-margin. First two antennal segments brown, third

and rather thick style pale yellow. Occiput with yellow tomentum and fine

yellow hairs.

Thorax: mesonotum red, a thick yellow tomentum leaves bare and shining

three broad longitudinal stripes (Fig. 5, @). Scutellum entirely covered with

tomentum. Ground colour of pleura pale on upper half, brown on lower, with

yellowish white tomentum. Halteres yellow, black tipped.

Abdomen: dark reddish brown, with thick brown tomentum discally and

white tomentum on segmentations. Bare patch in middle of second segment

and at bases of third, fourth and fifth. Terminalia as figured. (Fig. 6, /, 7.)

ASILIDAE 29

Legs: all femora pale whitish yellow at base. Fore and middle femora with

red-brown stripe in front, extending into a broken ring at tip; fore and middle

tibiae with anterior red-brown stripe; tarsi pale. Hind femora very slightly

Fig. 5.—Dorsal view of thorax: (a) Euscelidia lucida, sp. n. 3; (b) Euscelidia sp. 2.

clubbed, red-brown on club, from which stripes before and behind extend to-

wards base; tibiae with red-brown stripes before and behind; tarsi pale.

Wings: as figured (Fig. 4, b). Hyaline except for an indistinct stigma and a

slight infuscation at extreme tip.

Length of body, 10 mm.; of wing, 8 mm.

RUWENZORI: Namwamba Valley, 6500 ft., 1 3. Type.

Euscelidia sp.

RUWENZzORI: Kilembe, 4500 ft., 1 9.

Related to the preceding species but differs strikingly in the pattern of the

thorax (Fig. 5, 6). Other differences are the darker antennae—uniformly red-

brown—and the legs, especially the femora, which have more extensive dark

markings, of a translucent nigger-brown. Wings precisely similar to those of

the preceding.

It is possible that this may be the female of the preceding species. I have

not seen any species of this genus with such extensive sexual dimorphism, but

until the other sex of either, or both, is discovered I prefer not to name this

specimen.

30 RUWENZORI EXPEDITION

DASYPOGONINAE

Stichopogon Lw.

Stichopogon Loew, 1847, Linn. Entom. 2: 499 (Type: Dasypogon elegantulus Meigen by

designation of Back (1909, Trans. Amer. Ent. Soc., 35: 232).)

Stichopogon punctum Loew.

Stichopogon punctum Loew, 1851, Progr. Realschule Meseritz, 1851: 15.

Stichopogon punctatus Loew, 1852, Bericht. ber Verh. Kgl. Preuss. Akad. Wiss. Berlin,

1852: 658.

RUWENZORI: Kilembe, 4500 ft., 3 3, 2 9.

Both sexes are rather smaller than the specimens already in the Museum,

which are chiefly from more southerly parts of Africa. The present specimens

also have the tibiae less extensively reddish, and in the males the moustache

and facial hairs are brownish.

Neolaparus Will.

Neolaparvus Williston, 1889, Psyche, 5: 255 (mew name).

Laparus Loew, 1851, Progr. Realschule Meseritz, 1851: 4 (nec Billberg, 1820, LEP.)

(Type: Dasypogon tabidus Loew, by original designation.)

Engel (1930, Flieg. Pal. Reg. 4 (2): 442), states that Coquillet has fixed

gracilis Meigen as type of this genus, and that he (Engel) proposes to substitute

volcatus Walker, on the ground that gracilis Meigen is a Stenopogon! Apart

from the questionable nature of this action, Loew’s original statement: ‘“‘ Die

Art, auf welche ich sie [i.e. the subgenus Laparus| begriinde stammte ebenfalls

aus Brasilien,’ followed by a full description of D. (L) tabidus seems to be a

perfectly clear type fixation.

Neolaparus trifasciatus sp. n.

A medium-sized red and black species, with a very broad median dorsal

thoracic stripe, narrowing behind, and with more or less complete side-stripes.

3. Head: two yellow oral bristles. Face pale yellow, shining and trans-

lucent in middle, with a very narrow median black streak below antennae.

Frons shining black, with creamy tomentum at sides. Upper occiput shining

black with two creamy tomentose spots. Occipital hairs and bristles yellow.

Antennae blackish brown, paler below, with black hairs above, long yellow

bristles below; third segment one-and-a-half times as long as the first two

together, almost cylindrical. Proboscis and palpi black, hairs chiefly black,

especially on palpi, some pale.

Thorax: pronotum black above, and at sides of neck, otherwise yellow.

Mesonotum with median black stripe, very broad in front, narrowing to a point

on hind-margin. Laterally two large black spots almost fused to form a pair of

ASILIDAE 31

lateral black stripes. Between these and median stripe tomentum is olive-grey.

Humeri shining yellow. Scutellum black with rather broad orange border.

Ground colour of pleura yellow, except for two black stripes, one extending

from mesopleuron to middle coxa, other from metapleuron to hind coxa.

Mesophragma entirely black. All pleura with rather sparse yellowish white

Fig. 6.—Male terminalia: (a, b) Ommatius (?) canicoxa Speiser; (c) Ommatius -

dasypogon, sp. n.; (d) Ommatius imperatoy, sp. n.; (e) Neolophonotus unctus,

sp. n.; (f, g) Neolophonotus elgon, sp. n.; (h, i) Euscelidia lucida, sp. n.; (j, k)

Leptogastey entebbensis, sp. n.

tomentum. Halteres yellow-stalked, black-tipped. Three pairs of thoracic

bristles—one presutural, one supra-alar, one postalar—all blackish brown.

Abdomen: oily black, with large, indefinite red patches at sides of second

segment, and at sides and on dorsum of third, fourth and fifth segments.

Terminalia black above, shining red below, with numerous reddish hairs.

Legs: fore coxae entirely pale translucent yellow; middle and hind coxae

32 RUWENZORI EXPEDITION

blackish. All femora shining black in front and above, pale yellow behind and

below. Fore and middle tibiae almost entirely blackish, hind tibiae yellowish

on the ventral face; fore and hind tibiae ventrally with short, thick, yellow hair-

pad. All tarsi black, a little reddish ventrally. All hairs and bristies of legs

yellow.

Wings: hyaline, infuscated at tip for about half length of each posterior

cell.

2. Similar to male, but general colouration is much redder. Scutellum

entirely red, mesophragma only a little blackish in middle. Abdomen red,

with irregular blackish patches. Legs chiefly red; black stripes reduced on

fore and hind femora, and practically absent on middle pair; tibiae red;

tarsi darkened towards tips.

Length of body, 12 mm.; of wing, 10 mm.

RUWENZORI: Namwamba Valley, 6500 ft., 1 g Type, 1 Q Allotype,

5 6 1Q Paratypes.

Also 2 ¢ in the British Museum which clearly belong to this species from

UGANDA, Bugomolo, 24.1v.1927 (H. Hargreaves) and Kenya, Yala R., S. Edge

of Kukumega Forest, 4800-5300 ft., 21-28.v.1911 (S. A. Neave).

There is some variation in colour among the males in this series, particularly

in the amount of red on the abdomen—which may be entirely black—and in

the colour of the first two antennal segments, but the thoracic and leg-markings

make the species a very distinct one.

LAPHRIINAE

Laxenecera Macq.

Laxeneceva Macquart, 1838, Mém. Soc. Sci. Agric. Lille, 1838 (3): 193, and Dipt. Exot.

1 (2): 77. (Type: albibarbis Macquart, by designation of Hermann (1919, Deutsch.

Ent. Zeitschr.: 340).)

Laxenecera albicincta Loew

Laphria albicincta Loew, 1852, Bericht. tber Verh. Kgl. Preuss. Akad. Wiss. Berlin,

1852: 659.

UGANDA: Mbarara, 15.x1.1934, I ¢.

Differs from the typical form of this species in the absence of conspicuous

white hairs in the moustache, on the vertex and basal antennal segments, on

the mesonotum, tibiae and hypopygium. It is also distinctly smaller, and the

wing-veins on the basal half are black, not rust-coloured. There are practically

no traces of white hind-angles to the abdominal segments.

In spite of its obviously different general appearance I do not propose to

give this form a name, as I have before me a series from Mbarara (Fort Portal

Rd., 3800-4200 ft., 22-24.x.19g11 (S. A. Neave)), which shows all the inter-

mediate stages between this and the typical form.

ASILIDAE 33

Laxenecera auricomata Herm.

Laxeneceva aurvicomata Hermann, 1919, Deutsch. Ent. Zeitschr. 1919: 351.

Ucanpa: Mt. Elgon, Butandiga, 7000 ft., viii.1934 (J. Ford), 1 3.

RUWENzoRI: Kilembe, 4500 ft., I 9.

The fore and middle tarsi are darker than in the female already in the

Museum, but in other respects the two are exactly similar.

A second female from RUWENzOoRI, Kyarumba, 4500 ft. (D. R. Buxton),

very closely resembles L. auricomata Herm., from which it differs only in having

the pale pubescence silvery-white instead of golden-yellow. At most it can

only be regarded as a colour-variety of auricomata.

Proagonistes Lw.

Proagonistes Loew, 1858, Ofvers. Kongl. Vet. Akad. Forhandl. 14: 362, 367. (Type:

validus Loew, monotypic.)

Proagonistes praedo Austen

Proagonistes pyaedo Austen, 1909, Trans. Zool. Soc. Lond. 19 (1): 87.

RUWENZORI: Bwamba Pass (West Side), 5500-7500 ft., 2 g, 1 9.

The species was originally described from Ruwenzori, and has been taken in

neighbouring forest, on Mt. Kenya at upwards of 3000 ft., and in West Africa.

According to Engel (1932, Ann. Transvaal Mus. 14 (4): 253) Hermann apparently

decided to regard it as a variety of P. validus Loew.

ASILINAE

Alcimus Lw.

Alcimus Loew, 1848, Linn. Entom. 3:391. (Type: Tvupanea longipes Macquart,

monotypic.)

Alcimus taeniopus Rond.

Pyomachus taeniopus Rondani, 1873, Ann. Mus. Civ. Genova, 4: 292.

Alcimus taeniopus Ricardo, 1922, Ann. Mag. Nat. Hist. (9) 10: 42.

KenyA: Chania and Thika Falls, 4000 ft., 4 ¢.

A distinct species, readily recognized by the colouration of the femora,

which are red above and below, with a black stripe on each side. Described

from Abyssinia, this species was recorded from Zomba, Nyasaland, by Ricardo

and the Museum possesses specimens from E. Africa and the Sudan.

Bactria Mg.

Bactria Meigen, 1820, Syst. Beschr. Zweifl. Ins. 2: 307-8. (Type: Asilus pictus Meigen,

as Bactria vufipes Meig., monotypic.)

Promachus Loew, 1848, Linn. Entom. 3: 390. (Type: Asilus maculatus Pabr., by desig-

pation of Coquillet, 1910.)

Hobby (1936, Ent. Mon. Mag. 72: 182-183) has discussed the synonymy

of this genus, and justified the revival of the name Bactria,

II, 2c

34 RUWENZORI EXPEDITION

Bactria (Promachus) wollastoni Hobby

Bactria wollastont Hobby, 1936, Ent. Mon. Mag. 72: 239.

RUWENZORI: Namwamba Valley, 6500 ft., 8 g, 8 2; Mobuku Valley,

Bracken Area, Bikoni, 7300 ft., 29-31.xi1.34 (J. F. Shillito), 13 3, 5 8.

[All these specimens were taken in bracken areas, and many of them were

taken with prey, which in each case was a honey-bee.—F.W.E. ].

This species was described from a pair in the British Museum from UGANDA,

E. Ruwenzori, 5000-7000 ft., 2—26.1.1906 (Legge & Wollaston)—1.e. from almost

exactly the same locality as the present specimens. A pair of paratypes was

recorded from KENYA, Mogorr R., and there are also in the Museum four males

from UGANDA, Mpanga Forest, all taken in November.

I take this opportunity of figuring the dorsal view of the tip of the aedeagus

in this species, which was omitted from his plate by Hobby (1936: 275). There

is a close resemblance to that of B. mixta Hobby, though the rest of the genital

structure and the superficial characters are very different in the two species.

The distinct rim round the apex of the aedeagus in wollastont is unmistakable.

(Fig. 7, c; d).

Bactria (Promachus) metoxa sp. n.

The single male is unique in the form of its aedeagus (Fig. 7, a, 6). In the

peculiarly acute tip, with subterminal genital duct, and in the appearance of

the aedeagus from above it resembles acuminata Hobby, but Dr. Hobby, who

kindly examined this specimen, considers that the dorsal and ventral lobes

of the aedeagus relate it to versicolor and hastata Hobby. To the figures of

terminalia may be added the following notes on colouration:

6. Head: moustache yellow with black hairs above, and sparsely at sides.

Frontal and occipital hairs and bristles entirely black, beard yellow.

Thorax: pronotal bristles black, hairs mingled yellow and black. Pleural

hairs black in front, mostly yellow behind, though mesophragma has a number

of black bristles. Scutellar bristles mainly black, one or two yellow; hairs

long and yellow.

Abdomen: sternal hairs all pale yellow. Terminalia black haired, with a

few yellow hairs on eighth sternite and anal lamellae.

Legs: entirely black; bristles black, hairs largely black, but yellow on

coxae, below first two pairs of femora, and sparsely elsewhere.

Length of body, 18 mm.; of wing, 14 mm.

RUWENZORI: Bwamba Pass (West Side), 5500-7500 ft., 1 g. Type.

Bactria (Trypanoides) ugandiensis Ric.

Promachus ugandiensis Ricardo, 1920, Ann. Mag. Nat. Hist. (9) 5: 181.

KENYA: Mt. Elgon, Swam R., 5000 ft., 11.1935, I ¢, I &.

The species was described from Uganda, with allotype and paratypes from

Nyasaland.

ASILIDAE 35

Neolophonotus Engel.

Neolophonotus Engel, 1924, Bull. Soc. R. Ent. Egypte, 1924: 347 (new name).

Lophonotus Macquart, 1838, Mém. Soc. Sci. Agric. Lille, 1838, (3): 241, and Dipt. Exot.

I (2): 125. (nec Stephens, 1829) (Type: Asilus chalcogastey Wiedemann, by designation

of Coquillet (1910, Proc. U.S. Nat. Mus. 37: 562).)

Engel (1927, Ann. Transvaal Mus. 12 (2): 132-180) has revised this group

of genera and subgenera.

a eee 4D

Wy AP Ty

Fig. 7.—(a) Bactria metova, sp. n., male terminalia; (b) idem, aedeagus in dorsal

view; (c) Bactvia mixta Hobby, aedeagus in dorsal vo (d) Bactria wollastoni

Hobby, aedeagus in dorsal view; (e) Neolophonotus elgon, sp.n.; female terminalia

in lateral view; (f) zdem, dorsal view.

Neolophonotus (Neolophonotus) porcellus Speiser

Dysmachus porcellus Speiser, 1910, Schwed. Zool. Exped. Kilimandjaro-Meru fo (4): 102

Neolophonotus (N.) porcellus Engel, 1927, Ann. Transvaal Mus. 12 (2): 158.

RUWENzoRI: Namwamba Valley, 6500 ft., 1 g, 4 2; Bwamba Pass (West

Side), 5500-7500 ft., I ¢.

A distinct species, readily recognized by the form of the male terminalia.

Described from Meru, 3000 m., with a paratype from Kilimandjaro, 2000-3500 m.

In the British Museum from the slopes of Mt. Kenya, 6000-8500 ft.

Neolophonotus elgon sp. n

I am not able to locate this species subgenerically. In general facies it

seems to be a Lophopeltis, but the sparse mane and the very imperfectly deve-

loped discal abdominal bristles distinguish it from all the species of this sub-

genus known to me. I have not been able to identify the species from Engel’s

or Curran’s keys.

36 RUWENZORI EXPEDITION

3d. Head: face plane, parallel to eye-margin in side view, and extending

below the eyes for a distance rather shorter than the length of first antennal

segment. Cheeks with white tomentum. Moustache almost entirely white,

with a few black bristles on mouth-margin. Lateral hairs on frons mainly white,

on ocellar tubercule black. Occipital hairs white in middle, a tuft of black

bristles on each side, all proclinate. Lateral occipital hairs white. Antennae

black, first two segments with longer bristles black, shorter white. Palpi black

with black hairs; proboscis black.

Thorax: rather metallic black, with greyish yellow tomentum. Pronotal

bristles white. Mesonotal bristles black; three or four presutural dorsocentrals

on each side. Two long presutural achrosticals, and a mane of sparse and short

black hairs, scarcely as long as first antennal segment. Short, scattered hairs

mainly black, with a few white hairs near middle, and posteriorly. Scutellum

with bristles black, one pair on margin and a row of 4-6 in front of these;

lateral hair-tufts white. Pleural hairs entirely white, bristles rather yellowish.

Halteres yellow, or a little brownish.

Abdomen: black, with greyish-yellow tomentum, thicker laterally and in a

band along posterior margins of segments, varying with angle of light. Hairs

white, except dorsally on discs of segments, where they are mainly black. Bristles

white, confined to a lateral cluster on each side of first tergite, and one or two

rather weak ones laterally on second tergite. Terminalia black, with short white

hairs and a long white fringe on lower margin of upper forceps (Fig. 6, f, g).

Legs: black except tarsal segments, and very narrowly at knees, where they

are a little reddish. Bristles mainly, and hairs almost entirely, white. Hind

femora with only one ventral row of 5-6 stout bristles.

Wings: faintly and evenly greyish, with no apical infuscation. Small cross-

vein very slightly beyond middle of discal celi, short and rather inclined.

Length of body, 9g mm.; of wing, 6 mm.

2. Closely resembles male. Abdominal bristles more numerous, though

short, and can be detected on most segments; may be either black or white.

Ovipositor short, eighth segment nearly as broad as long; lamellae triangular

and sharply upturned (Fig. 7, e, f).

KeEnyA: Mt. Elgon, Heath Zone, 10,500-11,500 ft., 11.1935, I ¢ Type,

I 2 Allotype, 2 g 1 2 Paratypes.

Neomochtherus O.-S.

Neomochtherus Osten-Sacken, 1878, Cat. Dipt. N. Amer.: 82 (new name).

Mochtherus Loew, 1849, Linn. Ent. 4: 58 (mec Schmidt-Goebel, 1846). (Type: Asilus

pallipes Meigen, by designation of Coquillet (1910, Proc. U.S. Nat. Mus. 37: 571).)

Engel (1927: 132, et seq.) has given reasons for removing this genus from

synonymy with Heligmoneura Bigot and tabulates the generic differences.

ASILIDAE 37

Neomochtherus unctus sp. n.

A medium-sized species, with legs mainly black in front, yellow behind.

It agrees fairly well with the description of Heligmoneura monobia Speiser, from

Kilimandjaro, but the leg-markings are different.

$. Head: black, with yellowish tomentum. Facial knob slight, not more

than half height of face. Moustache sparse black at sides and above, white in

centre. Frontal and ocellar hairs, and occipital bristles black; occipital hairs

rather thick, white. Proboscis black, with white hairs at base; palpi black,

black-haired. Antennae mainly black, second segment reddish-yellow at base;

third segment short elliptical, black with yellow tomentum; arista black,

reddish towards tip, only a little longer than third segment.

Thorax: prothorax black, with grey and brown tomentum. Prothoracic

bristles yellow, hairs white above and in front, black at sides. Mesonotum with

two chocolate-brown stripes not reaching scutellum, narrowly separated by

yellow tomentum, and bordered laterally with a narrow and incomplete black

stripe, these black stripes uniting posteriorly with a black triangle, base in

front, apex touching scutellar suture. Laterally, three spots of yellow-brown

tomentum, margined in grey. Bristles black, dorsocentrals extending exactly

to transverse suture. Scutellum black, with greyish yellow tomentum and four

black marginal bristles. Pleura black, tomentum grey, except on upper margin

of mesopleuron where it is golden brown; sparse and fine hairs white, bristles

on meta- and hypopleura mainly black. Hairs on sides of mesophragma also

black.

Abdomen: black, with grey hind-margins and faint greyish tomentum on disc.

Dorsally hairs black. A complete row of bristles just before hind-margins of

segments, very short dorsally, becoming long and strong towards sides; mostly

black, though some longer ones towards sides may be white. Venter similarly

coloured, with longish white hairs and some premarginal white bristles. Ter-

minalia shining black, with hairs and bristles mainly black. (Fig. 6, e).

Legs: coxae blackish, with thick grey tomentum; hairs and bristles all

white. Femora reddish yellow, all with anterior face blackish. Fore and middle

tibiae reddish yellow, obscurely blackish in front; hind tibiae entirely blackish

except at base. [Fore and middle tarsi with first segment orange, and all other

tarsal segments orange at base. Longer bristles mostly white, shorter ones

black.

Wings: hyaline, infuscated at tip.

Length of body, 12 mm.; of wing, 10 mm.

KENYA: Chania Falls, 4000 ft., x.1934, I g. Type.

Neoitamus 0.-S.

Neottamus Osten-Sacken, 1878, Cat. Dipt. N. Amer.: 82 (new name).

Itamus Loew, 1849, Linn. Ent. 4: 84 (nec Schmidt-Goebel, 1846). (Type: Astlus

cyanurus Loew, by designation of Coquillet (rg10, Proc, U.S. Nat. Mus. 37: 556).)

38 RUWENZORI EXPEDITION

Neoitamus africanus Ricardo

Neoitamus africanus Ricardo, 1919, Ann. Mag. Nat. Hist. (9) 3: 73.

RUWENZORI: Namwamba Valley, 6500 ft., 1 g, 1 9.

This species was described from Mr. Kenya, Edge of Forest on S. and E.

Slopes, 6000-7000 ft. (S. A. Neave).

Fig. 9.—Neoitamus afvicanus Ricardo, male terminalia.

The female agrees with the type in all respects except that the moustache

contains a few yellow bristles, whereas in Ricardo’s three specimens it is abso-

lutely black. In other peculiarities, such as the silvery squamal fringe and

the pronounced forward bend of R5 about its middle—recalling that in Cznadus,

but not so sharply angled—the female agrees exactly with the type series.

As apparently only the female has so far been described, I take this oppor-

tunity of adding notes on the male,

ASILIDAE 39

g. Moustache as in accompanying female, white in middle, black above and

at sides. Wing very markedly browned in apical half, and especially along costal

margin, where veins are thickened and darkened and fore border slightly dilated;

wing membrane strongly ribbed in marginal cell and first half of first sub-

marginal. Venation as in Fig. 8. Hypopygium as in Fig. 9.

This species is scarcely a typical Neottamus. The non-proclinate occipital

bristles, the thickened fore border of the wing, and the form of the male ter-

minalia with laterally flattened and deeply projecting eighth and ninth sternites,

suggest the genus Astochia, which is the only genus besides Neoitamus to have

the sixth and seventh abdominal segments included in the ovipositor; but

there is no thickening of the first segment of the fore tarsus in this species.

Machimus Lw.

Machimus Loew, 1849, Linn. Ent. 4:1. (Type: Asilus chrysitis Meigen, by designation

of Coquillet (1910, Proc. U.S. Nat. Mus. 37: 564).)

Tolmerus Loew, 1849, Linn. Ent. 4:94. (Type: Asilus pyvagra Zeller, by designation of

Coquillet (r910, Proc. U.S. Nat. Mus. 37: 615).)

Machimus (Machimus) ugandiensis Ricardo

Machimus ugandiensis Ricardo, 1919, Ann. Mag. Nat. Hist. (9) 4: 56.

S.W. UGANDA: Kigezi Province, Mabungo,. 6000 ft., xi.1934 (J. Ford),

26,72;

UcanpDA: Mt. Elgon, Butandiga, 7000 ft., viii.1934 (J. Ford), 1 g, I 9.

This species was described from a long series collected by Dr. S. A. Neave

at various localities in Uganda. It is probably the same as M. caudiculatus

Speiser from Kilimandjaro, though Miss Ricardo thought that the pubescence

of the legs did not conform to Speiser’s description.

Machimus sp.

Kenya: Aberdare Range, Mt. Kinangop, gooo ft., x.34 (J. Ford), 1 .

Differs from the females of wgandiensis in the following characters: third

antennal segment shorter, being not more than four times as long as greatest

width; fore femora with no long bristly hairs below, all hairs being yellow;

pteropleuron, immediately below wing base with a thick tuft of rather long

yellow hair. All these characters are variable in the series of ugandiensis from

one locality, and it is probable that this female represents merely a local variant

of that species.

The bare lateral margins of the abdominal tergites in the two following

species suggest comparison with Machimus modestus Loew, which was described

from Asia Minor. I think the smaller size, the greater proportion of white in

the moustache of the males, and the reddish brown tarsi of gyms distinguish

40 RUWENZORI EXPEDITION

them. Superficially, they agree quite well with the description of T. pammelas

Speiser, from Kilimandjaro, but that species is said to have a small triangular

projection of the eighth sternite.

Machimus (Tolmerus) gymnus sp. n.

At once distinguished from the preceding species by the much shorter

third antennal segment, the excessively bristly thorax, and the lateral bare

patches on the abdomen.

3g. Head: antennae all black, with black hairs. Third segment not more

than four times as long as its greatest breadth (Fig. 10, a); arista with short

first section, and next section longer than third segment itself. Moustache

mainly black, with a number of white bristles along mouth-margin.

Thorax: mesonotal hairs black and stiff, so that dorsum of thorax has an

b TR :

Fig. 10.—(a) Machimus gymnus, sp. n., antenna; (b) Machimus juxta, sp. n.,

antenna; (c, d) Machimus juxta, sp. n., male terminalia.

unusually bristly appearance. Single specimen is rather greasy, but tomentum

appears to be greyish white. Mesopleural hairs also are black and bristle-like;

other pleural hairs and bristles pale yellow.

Abdomen: with greyish brown tomentum and bristles, and close-lying

yellow hairs, with a few black hairs on dorsum of last two or three segments.

Lateral margin of each segment is bare and broadly shining black, with short

yellow hairs. Venter with greyish yellow tomentum and yellow hairs. Ter-

minalia very similar to those of the following species. Eighth sternite testa-

ceous; rest of terminalia black with yellow hairs.

Legs: femora and tibiae black; tarsi reddish brown, last segment blackish.

Bristles, except those below hind femora, black; a somewhat sparse covering

of closely-lying yellow hairs on all legs.

ASILIDAE 4I

Wings: infuscated at tip up to fork of R4 + 5, in costal cell and in front half

of first submarginal cell, where membrane is ribbed.

Length of body, 12 mm.; of wing, 9 mm.

KeEnyA: Mt. Elgon, Heath Zone, 10,500-11,500 ft.; 1 g. Type.

Machimus (Tolmerus) juxta sp. n.

Very like the preceding species, especially in having bare lateral abdominal

margins, and in the form of the male terminalia (Fig. 10, c, d). It is distin-

guished by the longer third antennal segment (Fig. 10, 6); by the weaker

thoracic bristles; by having conspicuous long yellow hairs below the fore

femora; and by the entirely black tarsi.

The female differs from the male in the more completely black moustache

in which the white hairs are confined to the mouth-margin, and in the sparser

yellow hairs on the legs.

KenyA: Aberdare Range, Nyeri Track, 10,500-11,000 ft. (J. Ford), 1 3. Type ;

Aberdare Range, Mt. Kinangop, 10,000 ft. (F. W. Edwards), 1 9. Allotype.

Ommatius Wied.

Ommatius Wiedemann, 1821, Dipt. Exot.: 213. (Type: Asilus marginellus Fabr., by

designation of Coquillet (1910, Proc. U.S. Nat. Mus. 37: 579).)

Emphysomera Schiner, 1866, Verh. zool.-bot. Ges. Wien, 15: 632, 845. (Type: Om-

matius conopsoides Wied. by original designation: 845).)

Ommatinus Becker, 1925, Ent. Mitteil. 14: 65, 80. (Type: Ommatius pinguis Wulp,

by designation of Engel (1926, Flieg. Pal. Reg. 4 (2): 37).)

The genus Ommatinus was erected on the assumption that the type of

Ommatius Wd. was chinensis Fabr., Becker having overlooked Coquillet’s

fixation of marginellus abr. as type. Since marginellus would come within the

limits of Ommatinus as defined by Becker, this genus is synonymous with

Ommatius sensu stricto, even if the characters on which it is founded are accepted

as being of generic value. Emphysomera may usefully be retained as a subgenus.

The present collection contains four species of this genus. The African

Ommatius are so poorly known that it is difficult to name any of them with

certainty, but only one is sufficiently inconsistent with published descriptions

to be described as new. I also take this opportunity of describing a very

striking species from the same region, which appears to be unrecorded.

Ommatius sp., near canicoxa Speiser

? Ommatius canicoxa Speiser, 1913, Deutsch. Ent. Zeitschr. 1913: 142.

A series of specimens in this collection, and others already in the Museum,

show some variation, but the male terminalia, even after dissection, appear

to be precisely similar (Fig. 6, a, b). A medium to rather small species, mainly

black, with hind femora and tibiae obscurely orange on basal half, fore and

middle legs orange behind.

42 RUWENZORI EXPEDITION

3. Head: face with white tomentum. Hairs and bristles of moustache

white near mouth-margin, black in two rows above. Antennae entirely black;

third segment pear-shaped, 14 times as long as broad, with a little bronze

tomentum. Palpi black with fine pale yellow hairs; proboscis black, normal

length, hairs below pale.

Thorax: mesonotum black with thin bronze dusting, paler or whitish on

sides and on scutellum; some trace of two greyish yellow longitudinal stripes.

Bristles black, dorsocentrals not reaching suture. Pleura with black ground

colour and thick whitish yellow tomentum. Pronotal, pteropleural and most of

metapleural bristles black, other hairs and bristles pale. Halteres yellow-

stalked, red-tipped.

Abdomen: brownish black, rather bare, shining, with dull brown segmenta-

tions. Hairs black on disc, yellow on hind- and side-margins. Venter similar,

except that hairs are longer and pale.

Legs: fore coxae extensively orange in ground colour, especially in front;

middle coxae a little orange in front, otherwise coxae black, with pale yellow

hairs and bristles. Fore femora with anterodorsal black stripe, and weak pale

bristles below; fore tibiae with anterior pale brown stripe extending into a

black ring at tip; first tarsal segment yellow black at tip, others black. Middle

legs similar, but femora have at least two strong black bristles below. Hind

trochanters black, femora black on apical two-thirds above, apical one-third

below, orange at base, boundary between these areas not sharply defined.

Several strong black bristles below, which in this particular specimen are black.

Hind tibiae black on a little more than apical half, orange at base. Hind tarsi

all black.

Wings: tip infuscated as far as posterior crossvein, and also in tips of anal

and axillary cells; deeply browned along fore border of marginal cell. Anterior

wing margin not dilated, though vein Rz is thickened and runs very close to

costal border.

Length of body, 9 mm.; of wing, 8 mm.

The above description is drawn up from one male from RUWENzoRI, Nam-

wamba Valley, 6500 ft. Variation consists chiefly in reduction in the amount

of orange on the hind femora and in the spines below them, which are

more often pale and weak. In some specimens, mainly females, all coxae

are black in ground colour. A male from Lualaba R., 2500-4000 ft., 5.v.07

(S. A. Neave), has the anterior wing margin distinctly dilated, though in other

respects it is quite normal.

This species differs from Speiser’s description of canicoxa in the stripes on

the fore and middle tibiae, and in the virtually undilated wing. Compared

with the type of O. fallax Bigot the present species is distinguished by the much

smaller size, by lacking the very conspicuous wing-dilation, and by the structure

of the terminalia,

ASILIDAE 43

I have seen the following specimens in addition to those mentioned above:

In the present collection: IRUWENzoRI, Namwamba Valley, 6500 ft.,

I g, 3 2; Kilembe, 4500 ft., 4 gd, 4 9; Mobuku Valley, c. 4000 ft., 1 g, 2 9;

UcanpbA, Mbarara, 1 9; Budongo Forest, 1 9 (all F. W. Edwards).

RUWENZORI: Kyarumba, 4500 ft., 3 9; and Nyamgasani Valley, 6400 ft.,

I 9 (D. R. Buxton).

In Mr. J. F. Shillito’s collection: RUweEnzorI, Fort Portal, 10.v.36, 1 9;

Nyakasura, 26.1.35, I 6, 1 9; Bikoni, 7000-8000 ft., xii.34, I 3, 3 9; (all

J. FE. Shillito).

Ommatius (?) chiastoneurus Speiser

Ommatius chiastoneurus Speiser, 1910, Schwed. Zool. Exped. Kilimandjaro-Meru tro (4):

105. y

Differs from Speiser’s description in the following points: moustache almost

entirely black-haired, the usual white lower portion being confined to a few

hairs and bristles on the mouth-margin; palpi with long pale yellow hairs;

third antennal segment equal in length to two others together, about four

times as long as wide. The hind femora are unusually slender for this genus.

As Speiser remarks, this species somewhat resembles O. mayottae Bigot, of

which I have been able to see the type, but is less robust, and the black mous-

tache and the red, black-tipped first hind-tarsal segment serve to distinguish it.

One may remark here that (again as suggested by Speiser), there seems to be

no reason for separating mayottae Bigot from pulchripes Bigot, described earlier

in the same paper; unfortunately, I was not able to see the type of pulchripes.

I think the combined species is only a form of O. chinensis Fabr. Its distri-

bution in the islands off the east coast of Africa is quite in accordance with this

view.

RuweEnzori: Mt. Karangora, 8000-g000 ft., (fF. W. Edwards), 1 9; and

Nyamgasani Valley, 8000-9000 ft. (D. R. Buxton), 1 9.

A third female from UGANDA, Kigezi Distr., Kanaba, 7800 ft., is conspicu-

ously smaller and more slender than the above, and has narrower grey abdo-

minal segmentations, but otherwise I can see no clear specific difference between

them.

Ommatius (Emphysomera) macroscelis Bezzi

Ommatius macroscelis Bezzi, 1906, Bull. Soc. Entom. Ital. 37, 1905 (Ditteri Eritrei): 292.

Ucanpba: Mbarara, I5.x1.1934; I g

I think this is correctly referred to Bezzi’s species, though it is distinctly

smaller (6 mm.), and there is no trace of the tuft of robust black bristles on

the posterior coxae, to which he refers. O. macroscelis Bezzi was described

from Eritrea.

44 RUWENZORI EXPEDITION

Ommatius dasypogon sp. n.

A striking species, with thick white moustache practically confined to the

mouth-margin, with only two pairs of black bristles above, and with the

peculiarly complicated hypopygium found in O. ornatipes and its allies. It is

greatly to be regretted that the single male available has lost both hind tarsi,

which might have been expected to show ornamental feathering, as in ornatipes

Engel, recalling that in many male Dolichopodidae.

3. Head: face broad, over half width of an eye, with thick snow-white

Wiig \

|] Si

il AF]

H f

HDs

Fig. 11.—Ommatius dasypogon, sp. n., head.

tomentum. Moustache snow-white, exceptionally thick, and forming a flat

tuft about equal in length to the proboscis; above this only two pairs of black

bristles, upper half of face quite bare (Fig. 11). Antennae all black; first two

segments short, subequal; third segment about equal to second, with a very

long arista, three times length of rest of antenna, pectinate along its whole

length, and with a distinct tuft of hairs at tip. Ocellar and occipital bristles

black, proclinate. Proboscis and palpi black, with pale yellow hairs.

Thorax: Ground colour shining black, thinly covered with bronze tomen-

tum, and showing ground colour through rubbing. Pleura similar, more thickly

covered with whitish tomentum, hairs and bristles pale.

Abdomen. similar, with testaceous segmentations. All hairs and bristles pale.

Terminalia as figured (Fig. 6, c),

ASILIDAE 45

Legs: fore coxae orange, middle brown, hind black, all with white tomentum

and pale hairs and bristles. Fore legs yellow; femora with indistinct antero-

dorsal stripe, and very weak yellow bristles below; tibiae with pale brownish

anterior stripe; first and second tarsal segments yellow, others black, with a

line of yellow hairs dorsally. Middle legs similar. Hind femora and tibiae

yellow, with black stripes before and behind; [hind tarsi missing].

Wings. not dilated; anterior crossvein at apical third of discal cell. Wing

almost hyaline, faintly infuscated in all cells, but with no brown colouration.

Length of body, 10 mm.; of wing, 8 mm.

UcanpDa: Lake Nabugabo, 13.xi.34; 1 g. Type.

This is readily distinguished from ornatipes, which has all the facial pilosity

and the moustache yellow, and different terminalia. No others of the group

appear to have been described, but there are representatives of two or three

closely allied species standing unnamed in the British Museum.

Ommatius imperator sp. n.

A large, robust species, conspicuous for its bright yellow wings, with black

tips.

3g. Head: moustache white below, with three or four pairs of black bristles

above. Upper edge of moustache only reaches middle of face, which has white

tomentum below this level and bronze tomentum above, and on frons. First

antennal segment reddish brown, second bright orange with black hairs, third

somewhat darker, long, pear-shaped, with reddish brown arista. Proboscis and

palpi black, with yellow bristles.

Thorax: bright yellow or reddish above, with a pair of dark brown longi-

tudinal stripes, and two brown spots on each side of these. Scutellum with

brown tomentum except at extreme corners, which are whitish. Pleura with

chocolate brown tomentum from notopleural suture to bases of coxae. Meso-

phragma with whitish tomentum. Halteres brown stalked, white-tipped.

Hairs and bristles black.

Abdomen: chocolate brown, feebly shining, hind margins of first three

segments weakly cinereous, hairs black. Venter similar, some long hairs

whitish. Terminalia as figured (Fig. 6, d), dark reddish brown, with yellow hairs.

Legs: Fore coxae reddish brown, others black, with thick white tomentum,

and white hairs and bristles. Fore femora black on basal half, red on apical

half; fore tibiae reddish yellow, obscurely darker towards tip; fore tarsi

similar. Middle femora black with preapical red ring; tibiae and tarsi like

preceding pair, but rather more extensively dark. Hind femora black except

at base, with a ventral row of stout black bristles; hind tibiae black, bright

orange at base; hind tarsi black or rather reddish.

46 RUWENZORI EXPEDITION

Wings: bright orange from base of wing to root of radial fork and of second

posterior cell; from this point to tip of wing, black.

Length of body, 15 mm.; of wing, 15 mm.

Q. Precisely similar.

UcGanDaA: Toro, Daro (or Durro) Forest, 4000-4500 ft., 25—29.x.1911, I ¢ Type,

I g Allotype, 1 g, r 2 Paratypes; Southern Toro, Mbarara, Fort Portal Rd.,

3800-4200 ft., 22-24.x.1911, I gf (all S. A. Neave).

W. Ucanpda: Ankole, Kalinzu Forest, 1 g Paratype (T. H. E. Jackson)

{in the Oxford Museum].

BOMBYLIIDAE

The eleven specimens belong to four species, all of which are already recorded

from this region. There are no new species.

All the specimens were collected by Dr. F. W. Edwards, and unless it is

otherwise stated, are from the Ruwenzori Range, Uganda.

Bombylius Linn.

Bombylius Linnaeus, 1758, Syst. Nat. Ed. X: 606. (Type: Bombylius major Linn., by

designation of Latreille (1810, Consid. Gén., 443).)

Bombylius terminatus Beck.

Bombylius teyminatus Becker, 1910, Ann. Soc. Ent. France, 1910: 24.

RUWENzoRI: Namwamba Valley, 6500 ft., 2 ¢; Mpanga Valley, 6000 ft.,

I$; Mobuku Valley, 7300 ft., r g, 1 2.

This species was described from Nairobi, and has been recorded from several

localities in Kenya and Uganda. Legge and Wollaston took it on Ruwenzori

in 1906,

Bombylius mollis Bezzi

Bombylius mollis Bezzi, 1921, Ann. S. Afr. Mus. 18: 15.

Bombylius disjunctus Bezzi, 1921, loc. cit.: 15; Hesse, 1938, Ann. S. Afr. Mus. 34: 153.

RUWENZORI: Kilembe, 4500 ft., I 5, I &.

Widely distributed in S. and E. Africa.

Bombylius auricomus Bezzi

Bombylius auvicomus Bezzi, 1924, Bomb. Ethiop. Reg., 44.

KrENyA: Chania Falls, 4000 ft., 1 g, I 9.

Described from Abyssinia, and recorded from Nyasaland and Natal.

BOMBYLIIDAE 47

Anthrax Scop.

Anthrax Scopoli, 1763, Ent. Carniol.: 358 (nec. auct.). (Type: Musca anthvax Linn.,

monotypic as morio Scop., nec Linn.)

Argyvamoeba Schiner, 1860, Wien. Ent. Monatschr. 4: 51. (Type: Anthrax lyipunctata

Wied., by designation of Coquillet (1910, Proc. U.S. Nat. Mus. 37: 510).)

Anthrax nigerrimus ocellatus Bezzi

Anthrax nigervimus ocellatus Bezzi, 1924, Bomb. Ethiop. Reg.: 165.

RUWENZORI: Kilembe, 4500 ft., 2 3.

Described from Mpanga Forest, Toro, 4800 ft. This and the typical form

are recorded from similar altitudes at various places in Kenya and Uganda,

including Mt. Elgon.