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A Monograph of Culicidae. 
bands involving the apex of the preceding segments, there often 
being a few white scales on the apical borders ; these bands of 
pale scales spread out laterally, especially that on the third 
segment from the end; the last two segments with pale scales 
dotted all over them ; first segment brown in the middle, dark 
ochraceous towards the sides, scales dusky-white; each segment 
bordered posteriorly with dull golden-brown bristles; venter 
covered with pale ochraceous scales, almost white. 
Legs brown, with an ochraceous tinge ; femora very dark at 
the apex above, with white knee spot; tarsi dark brown, almost 
black, with narrow basal pale bands ; in the hind legs the basal 
bands are very wide, and whiter than in the fore and mid legs ; 
ungues equal and uniserrated. 
Wings with the veins covered with long brown scales ; first 
sub-marginal cell slightly longer and narrower than the second 
posterior cell its stem equal to about half the length of the cell; 
second posterior cell with its base about level with the base 
of the former, and its stem about equal to that of the sub- 
marginal cell; posterior cross-vein about its own length distant 
from the mid cross-vein. 
Halteres with ochraceous stem and fuscous knob. 
Length. —5*5 to 6 mm. 
Habitat. —United States (Andover, Howard), Nova Scotia 
(Walker). 
Time of capture. —June and Juty. 
Observations. —Besides Walker’s type, Professor Howard has 
sent three specimens from the United States. Closely related 
to 0. cantans, if not identical. 
This description is from two fairly fresh specimens from 
Professor Howard, although one was taken as long ago as 1867. 
Description from B. M. List, Walker :—> 
“ $ . Body brownish-red ; head and chest clothed with yellow hairs ; 
proboscis and antennae dark brown; each segment of the abdomen with a 
band of yellow hairs on the fore border, and on the hinder a few long 
yellow hairs; femora pale brown with black tips; tibiae darker brown ; 
tarsi black, the base of each joint yellow, with tawny tips. 
Length of the body, 2\ lines ; of the wings, 5 lines.” 
