﻿())i tlir ])()iitJ)i/ni(J Fdiiiiii of Smith Africa ( Dijifrrn). 119 



stripes of paler dust, one along the middle line, the others along the 

 dorsoceiitral lines. The hairs in front and on the sides are pale 

 jellowisli or whitish ; in the female there are besides uumei'ous short 

 bristles on the uotopleural line. Pleurae with pale grey dust, and with 

 white scales on the k)wer jiart of the niesopleura and on the sterno- 

 pleura ; the inesopleural hairs are greyish. Scutellum grey-dusted 

 at base and with yellow touientuui, shining black at the hind border 

 and on the sides ; the bristles of the hind border are 3'ellow or 

 yellowish. Squauuie dirty whitish, with pale yellow border and white 

 fringe ; haltères yellow, with darker knob. Al^domeu black, grey- 

 dusted ; the segments have whitish scales at the base on the sides and 

 on the hind border, and yellow scales in the middle; first segment 

 with long, dense, whitish hairs, the other segments with scarce, grey 

 or pale yellowish hairs, more developed in the male. The ventral side 

 of the tergites has a narrow yellow liorder ; venter grey-dusted, white- 

 scaled, with greyish hairs. Male genitalia grey, with the lower border 

 of the lamellae reddish ; terminal tuft of the female genitalia of 

 golden yellow colour. Coxae and femora black, grey-dusted, white- 

 scaled, whitish haired; the 4 anterior femora only narrowly yellow at 

 end : middle femora with 3-4 yellow spines on the middle of the 

 anterior side ; hind femora with (j-7 whitish or yellow spines below, 

 which in the male are very long, forming near the base a tuft of 

 4-5 longer ones placed in many rows. All the tibiae are pale yellowish, 

 with numerous and long yellowish or whitish spicules and spurs, even 

 on the front pair. Tarsi pale yellowish, darkened at end, with whitish 

 or yellowish spines at end of the two first joints ; claws pale yellowish 

 with black tips ; pulvilli whitish yellow, longer in the male than in 

 the female. Wings h^^aline, viti-eous, iridescent ; veins ])lack, the 

 first and the extreme base of the others being yellow ; alula pale 

 yellowish, with a short white fringe. In the present species the 

 recuiTent veinlet dividing the first from the second submarginal cell is 

 about twice or even a little more as long as the basal part of the 

 upper branch of the cubital fork — looking, therefore, as not being the 

 continuation of the second longitudinal vein. 



PETKOROSSIA, Bezzi (1908). 



This genus is well represented in the Ethiopian Fauna, and there 

 are also some species in South Africa ; tliose in the collection can be 

 distinguished as follows : 



1 (4). Tiiorax, scutellum and abdomen with yellowish or greyish tomentum 

 abdomen black, but with i-eddish yellow sides ; ]eççs pale yellow. 



