a handbook of the mosquitoes of north america - Systematic Catalog ...

116 hrosc~x~o~s OF NORTH AMERICA
appeared. When these larvae are nearly mature, there appears
a crop of minute larvae which later prove to be A. fitchii. Fre-
quently this species is found almost in pure cultures, immense
numbers of them in shallow pools with dense leaf covered
bottoms.
The habits of the adults are similar to those of A. excrztcia~zs
and A. stimulans. It is widely distributed throughout the Nor-
thern United States and Canada.
AEDES CANADENSIS Theobald
Czdex ca~zadensis Theobald, Mon. Culic. 2, 3. 1901.
Czllex &itarsis Coquillett, Proc. Ent. Sot. Wash. 6, 168. 1904.
Fenzale. Length 4.5 mm. ; wing 4 mm. Proboscis slender, black
to brownish-black. Occiput brown, clothed with many, curved, yel-
lowish-white scales; nape with narrow, erect, forked, brown and
yellowish scales intermixed; cheeks with flat, appressed white scales.
Mesonotum reddish-brown, densely clothed with narrow scales, gol-
den brown dorsally, yellowish-white on the lateral and anterior mar-
gins and around the antescutellar space; narrow yellowish line each
side on posterior half outside antescutellar space. Abdomen black,
with narrow basal segmental bands of white scales, widening later-
ally; these bands are frequently almost lacking especially on the sixth
and seventh segments ; venter amost entirely pale scaled. Wing
scales black or brown. Legs black ; tarsi black; each segment of the
hind tarsi narrowly banded with white at apex and base, last segment
entirely white ; rings on mid-tarsal segments much reduced and ab-
sent on the fore tarsi except on the first and second segments.
Male hypopygiwa. (Fig. 5, Pl. X.) Side-pieces a little more than
twice as long as wide; apical lobe quadrate, flattened with numerous
short setae; basal lobe large, quadrate in outline, densely clothed with
short setae. Claspers long, somewhat expanded at the middle. Clasp-
ette with a short cylindrical stem, setose, with a stouter seta just
before the apex; filament slender, pointed, about as long as the stem.
Mesosome slender, cylindrical ; widely open along the mid-ventral
line, closed on the dorsum and at the base. Lobes of the ninth ter-
gite short, and each bears a varying number of short, stout spines.
Larva. (Fig. 4, PI. XIX.) Length 8 mm. Head wider than long.
Antennae curved, prominently spined all over; a large tuft just be-
fore the middle; both pairs of dorsal head hairs large and multiple;