Diptera fruin South Africa. 95 



segment ; tlu* liairs :it the sides of abdomen art- not so thick 

 and the hand on the second sej^ment not so distinct ; the 

 underside is red only at the base, then hkick, with white 

 pubescence. Le-^s ratlicr (hnkir. 



This species is nearly allied to Kxoprosnpa indecisa, ^ , 

 Walker, the sinjjle speeiincn of which (the type) is in the 

 British Mnseum collection. 



Exoprosopa unifasciata, sp. n. 



Type (female), from Pretoria (IF. L. ]>.). 



Black, with reddish face, antennie, legs, and scutellum. 



Face red, black beneath, the antennie with black pubes- 

 cence and traces of yellow scaly hairs ; the forehead black, 

 with yellow scaly hairs and black pubc^cence. Antennae 

 reddish, the first two joints with black pubescence. Hind 

 part of head with greyish scaly hairs ; the collar consists of 

 yellowish-brown hairs. Thorax with yellowish scaly hairs 

 and yellow hairs at the sides; black bristles and black hairs 

 at the base of wings. Breast-sides with sparse yellow and 

 black |)ubescence. Scntcllnm red, black at the extreme base, 

 bordered with black bristles and with greyish tomentum. 

 Abdomen black, with a l)and of white hairs on the anterior 

 border of the second segment, traces of white scaly hairs 

 on the sides of the other segments and on their posterior 

 borders; pubescence black, and at the sides of abdomen, 

 except the first segment, where it is white ; there is a trace 

 of a red spot on the side of the second segment ; underside 

 black, shining, with greyish j)ubcsccnce on the basal half 

 only. Legs reddish brown, with black pubesceuce and 

 bristles. 



Wings grey, with dark brown shading on the fore border 

 not quite reaching the junction of the auxiliary vein witli the 

 border, extending to the second basal cell, but so faint in 

 that cell that the cross-veins enclosing it seem spotted, the 

 dark shading round them being very conspicuous, so that 

 the wing at first sight might belong to Division G of Loew. 

 The diseal cell is almost clear except at its base and along its 

 anterior side bordered by the fourth longitudinal vein ; 

 the base of the second longitudinal vein is just below the 

 bmall cross-vein ; the first posterior cell is somewhat narrowed 

 at its 0[)cning, the second and third about equal iu width. 



Length 10^ millim. 



