200 
A Monograph of Culiciclae. 
sides ; antennae dark brown, greyish pubescence and black hairs, 
the first few joints have creamy scales, basal joint round and dark 
with a few pale scales ; proboscis dark brown with some ochra- 
ceous reflections a little longer than the palpi; palpi dark 
brown with ochraceous reflections paler at the tips of the 
joints and at the apex, thickly scaled along the base ; clypeus 
brown. 
Thorax brown when viewed facing strong light, greyish- 
brown when pointing away from it, with four grey stripes, very 
clear in some lights on the denuded thorax, indistinct in others 
and in good specimens; the pale lines run as follows : two 
parallel ones in the middle running along about half the length 
of the mesonotum, the other two slightly curved, not far distant 
from the central ones and longer ; the whole mesonotum covered 
with long, scattered, golden, curved, hair-like scales; scutellum 
pale greyish-brown ; metanotum chestnut-brown with a narrow, 
dark median line; pleurae brown with grey tomentum. 
Abdomen blackish-brown clothed with scattered golden hairs, 
when viewed facing the light shiny-black and metallic. 
Legs long, ochraceous-brown with dark brown scales, 
especially towards their extremities, ventral surface of femora 
ochraceous-brown; there is also a pale knee-spot on all the legs 
and a pale spot at the end of the hind tibiae. 
Wings with the veins edged with thin, longish, brown scales, 
mid cross-vein in advance of the supernumerary and posterior 
cross-veins, the latter distant from the mid more than its own 
length ; stems of the two fork-cells about equal, first sub-marginal 
cell a little over twice the length of its stem and longer than 
the second posterior cell, base of the first cell a little nearer 
the base of the wing than that of the second posterior cell; 
fringe all brown. 
Halteres with ochraceous stem and a large globular dusky 
knob. 
Length of body, 5'5 to 6 mm., with proboscis, 10 mm.; of 
wings, 5’5 ; of hind legs, 12 mm. 
Habitat. —Lake Simcoe, Ontario, Canada (E. M. Walker). 
Time of capture. — September. 
Observations. — This species closely resembles the European 
A. bifurcaius, but differs from it in regard to the head ornamen¬ 
tation, the browner appearance of the thorax and the relative 
positions of the cross-veins as shown in Figure 60. When viewed 
under the microscope in some lights there will be seen four grey 
