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UNITED STATES NATIONAL MUSEUM BULLETIN 2 24 



present, concealed beneath the sixth tergite. Female 

 terminalia low, short, and almost completely concealed 

 in profile by the cuplike sixth tergite. Sides of the 

 ventral plate with 5 or 6 stout bristles ; the plate unclef t. 

 The males of Trisclioscelis differ from those of Hoplis- 

 tomerus in their quite concealed terminalia. 



Distribution : Ethiopian : Iloplistomerus caliginosa 

 Wulp (1899) ; engeli Oldroyd (1940) ; erythropus 

 Bezzi (1914) ; miniatus Oldroyd (1940) ; nobilis Loew 

 (1858); quintillus Oldroyd (1940; serripes Fabricius 

 (1805) [ = macuUpennis Macquart (1834)], serripes 

 auriventris Loew (1858) ; zeNmina Speiser (1910). 



Genus Trichardis Hermann 



Figuees 3G, 48, 438, 882, 891, 1784, 1787, 1910, 1975 



Trichardis Hermann. Zeitschr. syst. Hymen, und Dipt., vol. 

 6, p. 137, 1906. Type of genus : Trichardis testacea Her- 

 mann, 1920. Designated by Hermann, 1920, as Laphria 

 testacea Macquart, misidentification ; see Oldroyd 1940b. 



StroMlothrix Becker, Zeitschr. syst. Hymen, und Dipt., vol. 7, 

 pp. 42-42, 1907. Type of genus: Strobilothrix aloipila 

 Becker, 1907, by monotypy. 



Small flies with sparse, short, appressed pile, small, 

 short, obtuse proboscis, swollen hind femur bearing 

 stout, tubercular spines. The marginal cell is closed 

 at the margin, bulbous apically and anterior branch of 

 third vein strongly bent forward on its outer portion. 

 Distinguished from Tridioscelis Eoeder by the closed 

 marginal cell, the absence of matted, flat appressed pile 

 and by the S-shaped anterior branch of the third vein. 

 From Perasis Hermann it is separated by the short, 

 unswollen, blunt proboscis, the large female terminalia, 

 the character of the anterior branch of the third vein 

 and the absence of propleural bristles. Length 10 mm. 



Head, lateral aspect: The face is moderately devel- 

 oped, slightly convex, and somewhat more protuberant 

 below. The eyes are moderately recessive below and 

 strongly convex both anteriorly and posteriorly. The 

 occiput is obliterated at the vertex, prominent through 

 the middle and still more extensive below, its pile fine, 

 moderately long, and rather dense on the ventral third 

 but very scanty on the upper portion. Weak bristles 

 are present beginning at the middle of the occiput and 

 consist of 8 to 10 pairs, which are weak. The proboscis 

 is small, short, subcylindrical, at most slightly swollen 

 towards the base, a dorsal ridge almost absent, the apex 

 blunt and obtuse, with considerable long pile apically 

 and below, proboscis directed obliquely forward; ven- 

 tral half of the base bears a considerable amount of 

 fine, long pile. Palpus of two segments, first longer 

 and more robust, not excavated; the second smaller, 

 shorter, attenuate, not porate, and with the junction 

 of the two segments not immediately apparent. Both 

 segments bear a few scattered, stiff hairs. The antenna 

 is attached at the upper third of the head and relatively 

 short ; the first and second segments are nearly equal in 

 length. The first segment is strongly swollen below; 

 the third is laterally compressed, somewhat swollen, 



especially below in the middle of the segment, and 

 gently tapered at the base and somewhat more abruptly 

 toward the apex. The apex bears a short, microsegment 

 which is obliquely truncate dorsally and contains a dis- 

 tinct spine directed obliquely upward. Pile of the first 

 segment composed of 4 stiff setae above, 6 below and in 

 addition a long, very stout bristle. The second segment 

 has 2 long, subapical, slender bristles, a single one be- 

 low, and other stiff setae. 



Head, anterior aspect: Face below antenna one- 

 fourth of head width and slightly divergent below. 

 Subepistomal area short, nearly horizontal and slightly 

 concave. The face has rather dense, matted, stiff pile 

 which is directed downward and covers the entire face. 

 It is pubescent as well and true bristles are absent. 

 The front is slightly divergent but unusually short; 

 along each eye margin there are 4 or 5 weak bristles 

 and a patch of stiff, appressed pile, the whole pubescent. 

 The vertex is moderately excavated, with slanting sides, 

 the ocellar protuberance large, high, with steeply slant- 

 ing sides and bearing 2 pairs of long, quite stout bristles 

 and several fine, additional, short hairs. 



Thorax: The mesonotum is punctate and pubescent 

 only narrowly along the anterior and posterior mar- 

 gins and at the base of the wing ; the pleuron is pubes- 

 cent everywhere except for small, isolated, bare spots. 

 Mesonotal height is one-half of length. The pile of the 

 mesonotum is scanty, curled appressed and setate, a 

 wide, poorly differentiated band of acrostical bristles 

 present; dorsocentral bristles continue to be short 

 nearly as far as the scutellum, where there is on either 

 side a patch of rather longer, appressed pile. Humerus 

 with scattered pile and 2 or 3 bristles. Lateral margins 

 with short but quite stout bristles as follows: noto- 

 pleuron 1, a supraalar fringe of 6, postalar with 2, 

 scutellum with none. The scutellar disc bears on 

 either side a scattered group of 12 or more curled, ap- 

 pressed setae and there are 2 or 3 similar ones on the 

 margin. Pleuron with long, stiff pile on all portions, 

 the collar with 5 pairs of bristles. Mesopleuron with 

 scattered, stiff pile and similar patches on sterno- 

 pleuron, pteropleuron, posthypopleuron. Metapleu- 

 roD with a wide, vertical band containing numerous, 

 long, slender bristles. Metanotal slopes strongly bul- 

 lose and micropubescent only ; metasternal slopes with 

 numerous stiff hairs ; postmetacoxal area membranous. 

 Presternum not dissociated. Tegula pubescent only. 



Legs : All the femora are stout and more or less thick- 

 ened, the hind femur strongly thickened but entirely 

 on the dorsal half; bristles are comparatively stout, 

 moderately long, longest on the middle tibia. All pile 

 rather scanty and appressed and somewhat longer than 

 usual for this type of pile. All femora ventrally have 

 moderately abundant fringes of fine, erect pile, most 

 dense on the hind pair. The hind femur bears 3 dorso- 

 medial bristles subapically in a row, 3 dorsal, 3 or 4 ven- 

 trolateral, and 4 ventral bristles, each of which arises 

 from a very stout, broad tubercle and is distributed over 

 the middle; hind tibia stout, even to the base, slightly 

 curved and bearing 4 to 6 slender dorsal, 4 or 5 dorso- 



