Diptera from South Africa. 169 



it is long; the underside of abdomen is grey, with some 

 scattered white hairs. Legs black; the coxae grey, with 

 long white hairs; the femora and tibia? with short white 

 pubescence; all the bristles on legs are white, with the ex- 

 ception ot some on the last four tarsal joints. Halteres brown. 

 Wings clear, grey shading on the fore border as far as the 

 second longitudinal vein, extending into the submarginal cells, 

 where it gradually ends in a point; it also fills the centre of 

 the first and fourth posterior cells, and there is a small irre- 

 gular patch of it in the basal half of the second posterior 

 cell ; veins yellow ; the first posterior cell is nearly closed 

 in some specimens, in others hardly narrowed. 



Lenoth 27 millim. 



Type (female), Pienaars River (IF. L D ). 



The female is very similar, but the last three segments of 

 the abdomen are wholly black, though on the side of the sixth 

 the grey stripe is present ; the abdomen is more shining and 

 less pubescent. The pubescence on the legs is a little 

 slighter. The first posterior cell of the wings varies as 

 above. 



Leny-th 30 millim. 



Type (female), Pienaars River ( W. L. D.). 



These fine flies were found flying near the grou/nd, on 

 bare open veldt. One female was caught attacking a grass- 

 hopper. 



Microstylum nigrescens, <^ & $ , sp. n. 



Two males and two females from Angola, in British Museum 

 Coll., 76. bb and T6. 6Q ; one male and two females from 

 Angola [Monteiro), in Mr. Distant's Coll. 



Belongs to division Bb of Loew. — Moustache confined to 

 the lower part of the face, thin, with very stout bristles inter- 

 mixed. 



$ . Black. Face brown, with yellowish or whitish tomen- 

 tum ; the moustache consists of four large black bristles 

 intermixed with a very few black hairs; palpi black, the 

 tips reddish, clothed with black hairs. Beard black. An- 

 tennae black, the first and second joints more or less red with 

 black hairs and bristles. Forehead with an oblong shining 

 black spot on the vertex, continued as a narrow black line 

 to the antenna}, sides greyish with black hairs and bristles. 

 The hind part of head grey, with black hairs. The collar 

 covered with greyish tomentum, leddish on the posterior 

 half in the centre. Thorax black ; the shoulders, sides, and 

 posterior halt reddish, with greyish tomentum, forming one 

 central broad stripe divided in the middle, and one on each 



