Genus Culex. 
59 
of white scales, one between the wing and haltere on each side ; 
slightly ferruginous around the root of the wings. 
Abdomen dusky-black, first segment with thickly grouped 
golden hairs laterally, all the segments bordered with a row of 
pale golden hairs, last segment slightly ferruginous, densely 
hairy; laterally the posterior edges of the segments are white, 
the bases of the white areas being connected, and forming a 
more or less perceptible white lateral line; ventral surface with 
white scales and pale hairs. 
Legs dark brown above, white scaled below, especially the 
femora; coxae pure white, tibiae very dilated apically. 
Wings with the veins covered with brown scales, which along 
the costa and first long vein are very dark; first sub-marginal 
cell longer and narrower than the second posterior cell, stems of 
a. b 
Fig. 178. 
a, Cross-veins, and a', scutellar bristles of C. nigrochaetae; b 
and b ; , of C. cinereus. 
both short; posterior cross-vein considerably more than its own 
length distant from the middle cross-vein. 
Halteres with pale yellowish stems and clear dull white 
knobs. 
Length .—6 to 6 * 5 mm. 
$ . Thorax, head, and abdomen similar in colour to the 9 > 
but the abdomen has the penultimate segment covered dorsally 
with snow-white scales, forming a white apical spot. Antennae 
banded black and white, with dark brown verticils. Proboscis 
dark brown, black towards the tip, and with two black spots 
at the base; palpi longer than the proboscis, dark brown. 
Halteres in some specimens with a dusky knob, in others all 
pale. 
Length .—6 to 6*5 mm. 
