— 25 — 



The antennae which were broken in Westwood's type 

 are a little lighter than the colour of the eyestalks. The la- 

 teral spines are of the colour of the body, and not yellow. 

 The scutellar spines, also broken off in Westwood's type, 

 are slightly bent upwards in their distal part (i. e., dorsally). 



1 spec, from river Lumi, 2. VIII. 



8 other specimens from Zanzibar and Somaliland. 



Diopsis sulcifrons B e z z 1. 



Ann. Soc. Ent. Belgique. 52. 1908. p. 387. 



One of my specimens in its chief characters corresponds 

 to the description of D. sulcifrons B e z z i and differs mainly 

 in the absence of brown spots on the thorax, and in the 

 presence of a black apical spot on the wing as well. 



Length 8^/2 mm. Width of the head with eyestalks 6^/4 mm. 



The form of abdomen is wide, flat, with greatly shortened 

 posterior segments, about the same as in tJioracica. Colour 

 of abdomen — dingy red-brown, darker than in tJioracica 

 Wstw. 



Genus Diasemopsis R n d. 



Ann. Mus. Cir. Gen. VII, 1875, p. 442. 

 Bigot. Ann. S. Ent. Er. (5) X. 80 p. 91. 



Before proceeding with the description of the following 

 species belonging to the genus Diasemopsis Rond., I should 

 like to make some general remarks concerning this genus. 

 In 1875 Rondani divided the genus Diopsis L. into several 

 new genera, of which two new genera — Teleopsis and Diase- 

 mopsis — are of interest to us. The first genus with its type 

 Teleopsis sykesii. Wstw. is distinguished chiefly for the pre- 

 sence of a special pair of thoracic spines on the points of 

 attachment of the wings. As concerns the genus Diasemopsis 

 with its type D. aethiopica Rond., it is provided with spe- 

 cial setae at the extremity of the scutellar spines. 



In my material about half the species do not belong to 

 the typical genus Diopsis as they possess a seta on the ext- 

 remity of the scutellar spines. I attribute these species to 

 Diasemopsis Rond. notwithstanding the fact that in all of 

 them there is also a seta on the notum medially from the 



