On tie Homln/IHd Fauna of South Africa (Dl^tera). 45 



yellowish below. Scute! linn red, black at base, clothed, like the thorax, 

 with strong brownish bristles on the hind border. Squamae whitish 

 vellow, with yellowish fringe, which show a white sheen; halteres with 



J * o 



white knob. Abdomen short, rotund, black ; the hairs disposed on 

 separate rows and of a greyish lacteous colour, those on the base, sides 

 and end with strong silvery sheen ; there are complete rows of strong 

 black bristles on the hind border of the segments ; venter with white 

 hairs and black bristles in the middle ; genitalia hidden. Legs entirely 

 yellow, with black coxae and last tarsal joints infuscate ; they have 

 white scales, white hairs on the femora and black spines ; the spicules 

 of the four anterior tibiae are slender, but well developed ; front 

 femora without any, middle femora with one, hind femora with 6-7 

 spines below. Claws black, with a red base ; pulvilli whitish, long. 

 Wings hyaline, a little darkened at the extreme base and along the 

 first basal and the costal cells ; alula almost hyaline, yellow fringed ; 

 basal comb of larger size, black, yellow-pollinose near the base ; veins 

 red, a little darkened at end ; venation of the usual type, the discoidal 

 cell rather pointed at end, its apical cross-vein being only half as long 

 as the discal cross- vein. 



SYSTOECHUS FULIGINEUS, Loew (1863). 



Very distinct from all the other species having strong black bristles 

 on the abdomen, on account of the very dark, almost blackish 

 furriness of the body. 



A female specimen from ISTamaqualand, Spektakel, October, 1890 

 (E. M. Lightfoot), measuring less than 9 mm. in length. I refer it to 

 the male of greater size (18 mm.) described by Loew in a few words 

 from Bloemfontein, chiefly on account of the dark furriness of the 

 body ; from S. austeni, Bezzi, from Rhodesia it is distinguished by 

 the non-ciliated third antennal joint and by the iufuscated wings. 

 Occiput with yellowish hairs, frons and face with more infuscated 

 ones. Antennae entirely black, with the first joint more than twice 

 as long as the second, and a little shorter than the third, which is of 

 elongate conical shape and quite bare. Proboscis entirely black. The 

 dullish black thorax and the shining reddish scutellmn are clothed 

 with fuscous hairs and with black bristles. Squamulae yellowish- 

 brown with a whitish fringe ; halteres with a white knob. Abdomen 

 black, rather shiny, with fuscous hairs and with very numerous and 

 strong black bristles at hind border of the segments ; venter with pale 

 yellowish hairs at base ; anal tuft dirty whitish. Legs stout, entirely 

 blackish-brown, but with yellowish scales on the femora ; all the spines 



