On the Bombyliid Fauna of South Africa (Divtera). 43 



male specimeu from Sinithfield (Orange Free State), 1910 (D. R. 

 Kanueineyer). The scutellum is red, black at the base and at the 

 kind border ; spicules of the anterior tibiae well developed, but the 

 front femora are unarmed ; all the spines of the legs are black. 



SYSTOECHUS NIGRIPES, Loew (1863). 



Very closely allied to the preceding species, but lialf as small, and 

 with broadly separated eyes in the male and also with an entirely black 

 scutellum. 



A male specimen from Klerksdorp, Transvaal, December, 1890, and 

 another from Kimberley (Cape), March, 1912 (J. H. Power). 



Eves of the male separated for a distance equal to the breadth of 

 the ocellar triangle ; antennae entirely black, with the third joint 

 rather short, linear, not narrower at end than at base ; proboscis and 

 palpi black. Squamae whitish ; halteres white. Hairs on the whole 

 body pale yellowish, but if viewed from the front they are almost 

 white ; abdomen with only a few less distinct or even not distinct 

 black bristles at the end of the sides. Legs entirely black, with only 

 the knees a little yellowish, while in albidits the tibiae are more or less 

 but always broadly yellow ; the 4 anterior tibiae are thin and with 

 less developed spicules ; front femora unarmed, middle femora with 

 1-2, hind femora with 5-6 spines below. Basal iufuscation of the 

 wings rather broad, but of a more yellowish fringe ; basal comb long, 

 black, but with thin and more sparse bristles ; discoidal cell shorter 

 than usual, and therefore the second and third posterior cells longer 

 than in all the preceding species. 



Note. The present species is closely allied to the European 8. 

 leucopliaeus, Meig., being chiefly distinguished by the more broadly 

 separated eyes of the male. 



SYSTOECHUS MIXTUS, Wiedemann (1821). 



A well-known and common South-African species, easily dis- 

 tinguished by the complete rows of black bristles on the abdomen and 

 by the partly black spotted front legs, the front femora being also 

 unarmed below. 



A female specimen from Salisbury (S. Rhodesia), June, 1913; another 

 from Bushmanland, Henkries (Cape), October, 1911 (E. M. Lightfoot) ; 

 another from Marico (Transvaal). April, 1911 (A. T. Cooke) ; and one 

 from Natal, Maritzburg, labelled by Bigot as B. aurantiacus, Macq.,. 



