$2 SYRPHIDE. 
black bristle-like hairs in the middle; squamule 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 mal dilated on the sides; third segment with only a small 
yellow stripe on each side ; egurth with the whitish pattern less 
distinct. Lees entirely Bee clothed with short pale hair; knees 
and base of tibize, 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 
eell; 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 3, type 2, 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., 18.11.1911 (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 longicornis, Adams, seems 
also to belong here. The colouring of the Hbadinen 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. 
$ 9. 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 
