LATHYROPHTHALMUS. 85 
With this species begins a group of closely allied small species, 
of which there are six in the collection. The thorax is strongly 
striped as in quinquelineatus, the stripes being equally strong in 
both sexes; the body is short and quadrate, while in all Tie 
preceding groups it is elongite and conical. 
The present species was originally deseribed from Gaboon; there 
are three females from W a Africa, Obuasi, Ashanti, v.—viii. 1997, 
ra ane in swamp” (Dr. WW. Graham). 
S4. Lathyrophthalmus flaveolus, Biyo/ (1880). 
Very near the preceding, but of greater size and darker colour- 
ing, with the blaek thoracic stripes broader than the light ones. 
Originally described from Senegal; some specimens of both 
sexes Pass West Africa, Obuasi, Kumasi and Eduadin, Ashanti, 
1.-x. 1907, “caught hovering in swamp or near stream, the ¢ 
hovering round head ” (Dr. W. M. Graham). 
85. Lathyrophthalnius xanthopus, sp. n 
@. Length of the body 11 mm. 
Closely allied to the two preceding species, but distinguished by 
the black thoracic stripes being somewhat more shining, and by the 
third and fourth abdominal segments being wholly Bek without 
vellow bands. 
Head black, densely grey pollinose, only a little shining near the 
vertex; frons clothed with dark hairs, which become paler near the 
fore border ; ; before the ocelli there is a trace of a small black 
transverse band; antennal tubercle very little developed, wholly 
pollinose ; face entirely pollinose, the pollen grey on the sides, 
yellowish in the middle and below, disposed on the sides in oblique 
waves; hair on the sides whitish; tubercle yellow, not very promi- 
nent; face but little produced, epistoma not deeply bilobate, the 
opening of the buceal cavity small and round ; proboscis black ; peri- 
stoma narrow, shining black, white-haired behind ; antennz entirely 
yellow, the third joint short-oval, subquadrate, with a dark upper 
border; arista long, bare, dark reddish; eyes dark red, with very 
numerous and small round black spots, only on the upper edge a little 
confluent; the hairs on the eyes are very short and scarce, brown, 
confined to the upper edge, the greater part being bare. Dorsum of 
thorax yellowish-grey pollinose, with four broad longitudinal black 
stripes, which havea purplish sheen in the middle and are velvet- 
black on the sides; the two middle stripes are close together and 
become broader behind, the two lateral stripes are broader than 
the dividing-lines and become narrower behind ; notopleural region 
seneous and somewhat shining ; pleure grey pollinose, with a dark 
horizontal band across the mesoplenra ; ; hairs short, pale yellowish. 
Scutellum yellow, darkened at the base, clothed with yellowish 
hairs, but with the broad middle band of black hairs very distinet 
