On the Bombi/Uld Fauna of South Africa (Diptera). 75 



more intensive in the second basal cell, but not as strikingly as shown 

 in Wiedemaim's figure. The veins are intensely rufous, as in the other 

 species of the genus. 



CORSOMYZA PENNIPES, Wiedemanu (1820). 



Nearly allied to the preceding species, but distinct from it owing to 

 the short first anteunal joint and by the white- and yellow-haired pleura, 

 and distinct from any other on account of the densely and long- 

 feathered hind tibiae. Wiedemaim has described the female from the 

 Cape ; there is in the collection a male from the Cape, without precise 

 locality. C. pennipes of Macquart, " Suites a Buff on," is doubtful, 

 because the author says that the femora (and not the tibiae) have long 

 hairs. 



Head exactly as in the preceding species ; the first anteuual joint is 

 less than one-third of the third, and of a similar shape, which is very 

 different from that of the species following. Eyes more broadly 

 separated ; the middle frontal furrow is even more distinct. Proboscis 

 black, shorter, only 3 - 5 mm. long; palpi black, long, with much 

 longer and dense, almost leathery hairs. Pleurae destitute of black 

 hairs ; on the upper border of the metapleurae there is a rich tuft of 

 bright fulvous hairs, the other hairs being whitish ; breast with pale 

 hairs. Coxae with yellowish or whitish hairs ; the feathering of the 

 hind tibiae is formed by dense and numerous, very proximate black 

 hairs, which on the upper side are longer and equally extended to the 

 end, while on the under side they are shorter and groAving shorter 

 before the apex, which is bare ; even the hind tarsi are feathered ; 110 

 other species has such a conspicuous feathering of the hind legs. 



Wings as in C. simplex, but clearer and with a very faint } T ellowish 

 tinge at the base and along the fore border. The venation is identical. 



CORSOMYZA NIGRIPES, Wiedemann (1820). 



Allied to the two preceding species, but distinguished by the wholly 

 black legs, by the black-haired first antennal joint, and by the facial 

 brush being surrounded by black hairs. 



Described from the Cape and subsequently recorded by Loew, 

 Schiner, Kicardo and Becker ; there are in the collection two males 

 from Cape Town, one of which, caught in 1874, is labelled by Bigot 

 " Lasioprosopa biyotii Macq. " ! The colour of the fur of the body in the 

 present species varies from bright fulvous to pale yellowish and shining 

 white. To Loew's good description may be added : Frontal furrow 

 narrow but deep. The shape of the third autennal joint in the present 



