330 Appendix. 
vein long ; posterior cross-vein not quite twice its own length 
distant from the mid. 
Halteres with ochraceous stem and fuscous knob. 
Length .— 3*2 mm. 
Habitat. —Bonny. 
Time of capture. —May. 
Observations .—Described from a single 9 • I do not know 
any species at all resembling it, yet there are no very distinctive 
characters. The unbanded legs and abdomen and its general 
brown colour when roughly examined make it resemble Aedes 
nigra , but it can at once be told from it by the head and wing 
scales, which are of typical Culex form. 
Another 9 differs considerably in colour, but I can detect no 
structural difference. It is much paler, of a general ochraceous 
tint, due to denudation of the scales. The thorax is paler brown, 
with two pale median parallel stripes in front, separated by a 
darker line, and the scutellum has seven mid bristles, and the 
venter of the abdomen is paler and grey scaled. Venation, 
scales, ungues, etc., are similar, and it was taken in the same 
place and date as the type. I fancy one is full of ova, the other 
dark with blood. 
14. Culex invenustus. Theobald. 
(Kept. Liverpool School Trop, Med. p. ix. App. 1901.) 
Thorax dark brown ; abdomen black, unbanded and unspotted. 
Legs dark brown, with pale grey bases, fore and mid femora thick. 
9 . Head almost black, with narrow ochraceous grey curved 
scales, blackish and brown thin upright forked ones, white flat 
Fig. 309. 
C'ulex invenustus. n. sp. 
a, Wing of ? ; b, head. 
scales at the sides and a narrow white border round the eyes; 
eyes black; palpi short, dark brown; proboscis rather short, 
dark brown, testaceous at the tip ; antennae dark brown, basal 
joint black, last two joints very hairy; clypeus black. Thorax 
