On the Boiiilii/Iiid Fauna of South Africa (Dipt era). 69 



alula rounded, of moderate size, but destitute of fringe. Second 

 longitudinal vein gently curved at end, the marginal cell being broad 

 at end ; three submarginal cells present ; upper branch of the cubital 

 fork much retreating at base, the cross-vein dividing the first sub- 

 marginal cell being situated near its base and distinctly longer than 

 the part of the third between it and the origin of the fork ; first 

 posterior cell not narrowed, as broad at end as in the middle ; discal 

 cross-vein after the middle of the discoidal cell, but not so much as in 

 Adelidea. Discoidal cell triangular at base, truncate at end and there 

 with parallel sides, its terminal vein being as long as the discal cross- 

 vein ; the two lower veins of the discoidal cell are of equal length, but 

 form a deep angle in the middle at their junction ; second posterior 

 cell narrow and long, rectangular, the third being much broader. Anal 

 cell narrowed at end ; axillary lobe well developed, but very little 

 prominent ; ambient vein complete. The wings are besides strongly 

 pilose at the base from the first to the sixth vein, which is not the 

 case in Adelidea. 



Type : the following new species. 



SOSIOMYIA CARNATA, Sp. UOV., $ , $ . 



A strange fly, very like Adelidea anomala. but distinguished, 

 besides the generic characters, by the darker general coloration, by the 

 legs having black femora and partly black spicules on the tibiae, and 

 by the different pattern of the wings. 



Type $ and type $ , a single pair from the Cape, without precise 

 locality. 



Length of the body 6'5-7 mm. ; of a wing 8 nini. ; spread 20 mm. 

 Head entirely black, even on the mouth borders, grey-dusted, with 

 some golden tomeutum on the upper border of the occiput and on the 

 frons ; hairs of the occiput of middle length, golden yellow above, 

 white and shorter on the sides and below ; beard long, but not dense, 

 white ; hairs of the ocellar tubercle black. Frons in the male with a 

 few black hairs over the golden tomentum in the narrowed basal half ; 

 densely clothed in the apical half with pale yellowish hairs which are 

 directed forwards and outwards. The numerous bristles of the frons of 

 the female are golden-coloured and only near the antennae are 

 yellowish hairs. Face and cheeks in both sexes whitish-dusted and 

 with long white hairs, which only on the upper part are pale yellowish. 

 Antennae entirely black, grey-dusted ; the hairs of the first joint are 

 partly yellowish and partly golden ; those of the third are also pale- 



