﻿071 the Bomhi/lild Fonna of Sovtlt Africa (Dipipra). 79 



ai'eolets only a little broader and not really distinctly separated from 

 tlie others. Face with the brush formed by long and less dense 

 blade hairs, with a few yellow ones scattered in the middle ; the 

 genae and the chin are likewise clothed with black hairs. Antennae 

 entirely black ; the first joint short, provided with long and radiating 

 bright yellow hairs ; third joint with the basal half thin and filiform, 

 the apical half broadened to form an ovate spatula acute at tip, instead 

 of being obtuse as in davlcornis. Proboscis entirely black, '2'5 mm. 

 long ; palpi elongate, black, with rare blaelc hairs. Hind part of 

 thorax and scutellum black, clothed with long but not dense, l:)right 

 fulvous hairs ; only below the root of the wings there is a small tuft 

 of fulvous hairs directed backwards. Haltères yellowish with whitish 

 knob ; squamae small, dirty yellowish, with whitish fringe, the plumule 

 with yellow fringe. Abdomen black, densely clothed with bright 

 fulvous equal hairs, even on the l)elly. The contrast of colour between 

 the upper and lateral parts of the thorax and head is very striking. 

 Legs black, the tibiae sometimes with dark yellowish brown ground- 

 colour ; coxae and underside of femoi'a with long, rather rigid, black 

 hairs ; hind tibiae shortly ciliated outwards ; claws black, pulvilli 

 dark. Wings exactly as in hirtlpes. 



CORSOMYZA RUFICORNIS, Sp. UOV., ^. 



A small, rather abei'rant species, easily distinguished from any 

 other on account of its red third autennal joint. 



Type (^ , a single damaged specimen from the Victoria Falls 

 (S. Ehodesia), July, 1911 (L. Pcringuey). 



Length of the body 6 mm. ; of a wing 5-5 mm. Head black ; 

 occiput grey-dusted with scarce and short whitish hairs above in the 

 middle. The usual vertical crest seems to be I'educed to the ocellar 

 tuft which is entirely formed by whitish hairs ; eyes with the upper 

 areolets broader, the smaller ones being confined to the lower third, 

 and being separated by a sharply defined line ; frons a little broader 

 than the ocellar triangle, clothed Avith long black hairs, turning to 

 whitish before the antennae ; facial brush formed by long whitish 

 hairs surrounded by not well-defined dark ones ; beard whitish. 

 First antennal joint sliort, black, with whitish hairs ; third joint red, 

 with the basal half thin and filiform, and the apical half a little 

 broadened to form a dark spatula bilobate at end. Proboscis broken 

 off in the type example. Tliorax, scutellum and abdomen black, 

 clothed with long but not dense whitish hairs ; pleurae, breast and 

 belly likewise whitish haired. Haltères pale yellowish, their knob 

 blackish above ; squamae very small, with rare and pale hairs, 



