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

CULICINI 115
black and yellowish scales about evenly mixed; tarsi black, each
segment of the hind tarsi broadly banded with white scales at the base;
on the front and middle tarsi the bands are narrow, the last two
segments of the front and the last one of the middle tarsi wholly
black.
Male hypopygiuwk (Fig. 4, Pl. X.) Side-pieces nearly three times
as long as wide; apical lobe prominent, rounded and bears short
and long stout setae almost appearing as spines: basal lobe triangu-
lar clothed with numerous curving setae; on the outer basal side is
a smaller elevation clothed with longer setae and one stout spine.
Clasper stout, expanded at the middle, slightly tapering on apical
half. Claspette stem long; filament short, slightly angularly expanded
near base, and ends in a recurved point. Mesosome a rather short,
stout cyinder, open along the median ventral line, closed on the
dorsum and at the base. Lobes of the ninth tergites short and each
bears a number of long stout spines.
LWZRZ. (Fig. 6, PI. XIX.) Length S-10 mm. Head as wide as
long. Antenna spinose all over with large and small spines; tuft
prominent inserted before the middle. Both pairs of dorsal head
hairs multiple. Anteantennal tuft multiple. Abdomen stout, with long
hairs; lateral hairs on the first to sixth segments double, those of the
first and second segments may be frequently in threes; a series of
long single or double sub-median dorsal hairs on the third to the
seventh segments ; a similar series on the venter. Lateral comb of
eighth segment of numerous scales in a triangular patch. Anal seg-
ment distinctly longer than wide; the dorsal plate large and ex-
tending well down to the mid-ventral line; dorsal brush consists of
a long hair and multiple tuft on either side; ventral brush well de-
veloped with smaller tufts preceding the barred area to near the base.
Gills ensiform, pointed and longer than the anal segment. Air-tube
four times as long as wide, tapering gradually from near the base;
pecten evenly and closely set, reaching to near the middle of the
tube; hair tuft is large and situated at the middle of the tube.
The larva of this species occurs during the early spring in
pools filled from melting snows, in wooded swamps and open
marshes, generally associated with A. excrucians and A. sti~~u-
Cans. The larvae develop about ten days to two weeks later
than the other two species. It has been interesting to study
pools where these species breed and note the early abundance
of A. s’timdauts and Al. excrmia~ns soon after the ice has dis-