34 Annals of the South African Museum. 



strong bristles at apex arid with a very dense tuft of black bristles in 

 the middle before the apex ; male genitalia of a pale reddish colour. 

 Legs yellow, with the femora more or less broadly black at base ; they 

 are provided with silvery scales and have yellow spines, those of the 

 hind femora very numerous and strong ; claws black, with yellow 

 base. Wings hyaline, yellowish at base and along the costal cell and 

 base of the subcostal cell ; discal cross-vein and end of second basal 

 cell sometimes narrowly marginated with fuscous ; basal comb large, 

 yellowish, white-scaled and white-haired above ; veins yellow, infuscated 

 at end ; disposed like the preceding species, but the discal cross-vein 

 placed distinctly before the middle, nearly at the first third of the 

 discoidal cell. 



One female has the hairs on the back of thorax white, not brownish. 



BOMBYLIUS ARGENTIFER, Walker (1840). 



A couple of specimens from Spektakel, N am aqu aland, and Clan- 

 william. (Cape) determined as argentifer by Bigot. They answer very 

 well to the description of this species from the Cape. It is closely 

 allied to the preceding, but distinct by the much less developed bristles, 

 entirely white hairs of the thorax, wholly hyaline, vitreous wings with 

 the discal cross-vein placed on the middle of the discoidal cell ; in the 

 female the wings show a trace of the coloration of the preceding near 

 the base and on the cross-veins. The venter of the female is destitute 

 of black tuft ; and the female only has at the end of the abdomen 

 some scarce brownish hairs, which do not form the distinct tuft of the 

 preceding. Hind femora below with the usual strong spines. 



Bo3iBYLitrs MOLITOB, Wiedeiiiann (1830). 



A couple of specimens from Bushmanland, Jackal's Water, and 

 Henkries (Cape) (R. M. Lightfoot), This species also has never been 

 recorded since its original description, and is closely allied to the 

 preceding one, being distinguished by the very broad frons of the 

 female, by the strong bristles of the abdomen and by the punctate 

 wings. Bristles of genae and of peristome entirely wanting ; frons 

 of the male as narrow as in the preceding, that of the female with 

 bristles on the sides ; third anteunal joint linear, but very much 

 narrowed in its last half. Hairs of body white or grey ; bristles of 

 thorax, scutellum and abdomen very numerous and long, yellowish, 

 but those on the abdomen of the female black with yellow base, well 

 developed even on venter. Legs clothed with dense silvery scales, the 

 femora black, those of the hind pair with strong spines below even 



