Genus Lasioconops. 237 
with narrow basal pale bands, which to some extent involve the 
apices of the preceding segments. 
Q. Head dark brown, with narrow-curved, pale grey scales, 
brown and ochraceous forked scales, and small, flat, grey ones at 
the sides ; antennae brown, basal joint black on the inside, with 
small white scales, and with a grey sheen on the outside, second 
Joint bright testaceous ; palpi with black scales, and apical grey 
ones ; proboscis black scaled, with a pale median band ; clypeus 
deep brown, with frosty sheen. , 
Thorax black, the anterior two-thirds clothed with narrow- 
curved, grey scales, palest at the posterior edge of this pale scaled 
area, where they form a wavy line ; posterior portion of the meso- 
notum with narrow-curved, black and brown scales and numerous 
black bristles; scutellum brown, with narrow-curved, dull 
creamy scales, and with eight black border-bristles to the mid 
lobe ; pleurae black, with patches of white scales and pale creamy 
hairs. 
Abdomen black, with narrow basal bands of white scales and 
very large and peculiar white and ochraceous lateral projecting 
scales ; posterior border-bristles golden, short ; venter black, with 
white scales. 
Legs dark brown, the femora spotted and mottled with pale 
scales, the tibiae with small creamy spots ; metatarsi and tarsi 
dark brown, with narrow, pale, ochraceous bands involving both 
sides of the joints. 
Wings with typical brown Culex scales; surface of the wing 
with minute bristles ; first sub-marginal cell longer and narrower 
than the second posterior cell, its base nearer the base of the 
wing than that of the latter, its stem about one-fourth the length 
of the cell; stem of the second posterior not quite one-third the 
length of the cell ; supernumerary cross-vein not level with the 
mid cross-vein, a little nearer to the base of the wing ; posterior 
cross-vein about two and a half times its own length from the 
mid cross-vein ; sixth vein rather densely scaled. Halteres dusky 
ochraceous. 
Length.—6 mm. 
Habitat.—Bonny, West Africa (Annett); and Gambia 
(Dutton). 
Time of capture.—JSuly (Annett) ; December (Dutton). 
Observations.— Described from a single 9 , somewhat denuded, 
but easily told from all other Culicidae by the curious abdominal 
lateral scales, which are certainly of generic importance. The 
