82 STRPH1D.E. 



black bristle-like hairs in the middle ; squamulse whitish, yellow- 

 margined and white-fringed ; halteres whitish. Abdomen of the 

 male less conical than in the preceding species ; first segment black, 

 grey-margined ; second yellow, with a rather broad black basal 

 band, tapering towards the sides, which it does not reach ; there 

 is also a short brownish band before the hind border ; third yellow, 

 with a brownish and darker band before the hind border ; fourth 

 brownish black, shining, with whitish bands on the fore border, 

 sides, and hind border, but without a middle band ; genitalia of 

 the male shining black, with a single black appendage below ; 

 fourth ventral segment simple. The hair on the abdomen is pale, 

 rather long on the base at the sides, dark on the dark portions. 

 Abdomen of the female almost entirely black, moderately shining ; 

 second segment with a yellow band, broadly interrupted in the 

 middle and dilated on the sides ; third segment with only a small 

 yellow stripe on each side ; fourth with the whitish pattern less 

 distinct. Legs entirely black, clothed with short pale hair ; knees 

 and base of tibiae, more broadly in the female, yellow ; hind femora 

 rather thick, a little bent, almost bare below, with some black 

 bristles before the end ; claws black, small, reddish at the base. 

 Wings hyaline, with a faint yellowish tinge, without any pubes- 

 cence ; marginal cell very short-stalked, as long as the subcostal 

 cell ; kink in the third vein very deep, but rounded ; small cross- 

 vein at the middle of the discal cell ; this last cell without an 

 appendix ; anal cell dilated towards its middle ; there is a small 

 black stigmatic spot. 



Type $ , type 5 > and an additional female specimen from British 

 East Africa, Kilolo River, N. of Mt. Kenia, 7,700 ft., 16. ii. 1911, 

 and W. of Mt. Kenia, 8,300 ft., 18. ii. 1911 (T. J. Anderson}. 



79. Lathyrophthalmus euzonus, Loew (1858). 



Distinguished by the prominent face, which is almost entirely 

 shining black like the antennal tubercle, and by the legs being 

 for the most part black. The species Ion yi corn is, Adams, seems 

 also to belong here. The colouring of the abdomen appears to be 

 very variable, according to Loew ; the present specimens, however, 

 belong to a distinct variety, which I had previously regarded as a 

 good species. This variety may be characterised as follows : 



Var. andersoni, var. n. 



c? $ . Length of the body 10-11 mm. 



Head black, dark grey pollinose, whitish on the lower occipital 

 border ; eyes clothed with dark and rather long hairs, and adorned 

 with numerous confluent black spots ; in the male they meet 

 together for a short distance, equal to half the vertical triangle in 

 length ; occipital border with long yellowish hair above, almost 

 bare on the sides, and with long white hair below ; vertical tri- 

 angle of the male moderately shining, black and clothed with 



