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

166 MOSQUITOES OF NORTH AMERICA
The description of the female of CuZex pipielzs Linn. applies
to this species (p. 164). The only differential character is found
in the basal bands of the abdominal segments. In pipiens the basal
bands are continuous with the lateral spots, while in qui~zqz~cfasciatus
the lateral spots are detached from the basal bands. Even this charac-
ter is fleeting and should be used with care. In the male, the
hypopygium is more diagnostic but there appears to be gradations
between the two more or less distinct types. These gradations are
found where the two species intermingle.
Hypopygiuna. (Fig. 1, PI. XVIa.) Side-pieces twice as long as
wide ; apical lobes short, quadrate; each bears eight appendages-be-
ginning at the apical margin, a seta, a leaf, a flattened rod, two setae,
and three rods of equal length) the apical rod not so stout as the other
two). Clasper stout at base, gradually tapering towards apex and
terminating in an apical spine. Tenth sternites prominent, each half
ending distally in a crown of rather fine setae. The mesosome is a
paired structure, each half with three processes-(l) the median
process broad, pointed, and extending far beyond the sternites; (2)
a pair of upright process uniformly tapering to their apices; (3)
a pair of small oblique processes usually seen behind the median pro-
cesses. The paramers are stout, fitting closely to the base of the
mesosome. The basal plates are long, curving structures, Lobes of
the ninth tergite widely separated, small, bearing setae.
Larva. The larva is practically identical with that of C&x
pipiens (p. 165). The only differentiating character is the sub-
dorsal hairs of the third and fourth abdominal segments-in pipiens
these are double, in quimpefasciatus single.
This is the house mosquito of the tropical and sub-tropical
regions of the world. The larvae breed by preference in arti-
ficial containers but it also occurs in grassy pools and various
types of ground pools far from habitations. Dyar states that
it occurs in North America to 39” north latitude.
CULEX TERRITANS Walker
Culex territam Walker, Ins. Saund., Dipt., 1, 428. 1856.
Cz4Zex restuans Theobald, Mon. Culic., 2, 142. 1901.
CzlJex brehnzei Knab., Proc. Biol. Sot. Wash., 29, 161. 1916.
Fenzale. Length 4.5 mm.; wing 4 mm. Proboscis long, slender,
brown scaled except for some white scales on the under side. Oc-