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

118 MOSQUITOES OF NORTH AMERICA
AecFes obscums Me&en, Abbild. Zweifl. Ins. pl. II, fig. 2. 1830.
Culex laxarezzsis Felt and Young, Science N. S. 20, 3 12. 1904.
C&x borealis Ludlow, Can. Ent. 43, 178. 1911.
Aedes tahoewsis Dyar, Ins. Ins. Mens. 4, 82. 1916.
Aedes altiusczhs Dyar, Ins. Ins. Mens. 5, 100. 1917.
Aedes wzasanm Dyar, Ins. Ins. Mens. 8, 166. 1920.
Ochlerotatus palme& Edwards, Ent. Tidskr. 52. 1921.
Female. Length 5-6 mm .; wing 5 mm. Proboscis slender, black, Oc-
ciput black, clothed with pale yellow, curved scales; nape with many
narrow, erect, slightly forked pale yellow scales; cheeks with broad
flat, yellowish-white scales. Mesonotum black, densely clothed with
scales, a dark brown narrow longitudinal stripe of fine scales each side
of the median line; medianly a stripe of stouter, pale scales divided by
a very narrow bare line; a short brown stripe each side of the an-
tescutellar space ; the sides and antescutellar space with light brown-
ish-yellow scales. Abdomen brownish-black; each segment with a
broad basal band of white scales; venter yellowish-white scaled ex-
cept apices of segments which are black scaled. Wing scales brown-
ish-black to black. Legs long, black.
iklale hypopygium. (Fig. 6, Pl. X.) Side-pieces three times as
long as wide; apical lobe large, rounded and bears numerous rather
long stout spines and shorter setae; basal lobe small, quadrilateral
in outline, somewhat detached at base; margin with a row of promi-
nent recurved spines ; smaller setae scattered over the lobe; a single
stout spine arises from near the base. Clasper short, expanded near
the middle. Claspette with stout, long cylindrical stem, somewhat
tapering to the apex, pilose; filament short, broadly expanded near
the base, and terminating in a rather long recurved point. Mesosome
cylindrical, stout, short, closed on the dorsal surface, open along the
median ventral line and closed at the base. Lobes of the ninth ter-
gite prominent, long and each bears five or more stout short spines.
Larva. (Fig. 2, Pl. XIX.) Length 10 mm. Head rounded, wider
than long; antenna cylindrical, curved, small spines present, larger
ones on the outer margin; tuft large, situated before the middle. Up-
per and lower dorsal head hairs single; anteantennal tuft large and
multiple. Abdominal lateral hairs double on the first to fifth seg-
ments, single on the sixth. Lateral comb of eighth segment consists
of 40-50 scales arranged in a large, triangular patch. Anal segment
about as wide as long; dorsal plate reaching two-thirds of the way
down the sides. Anal gills much longer than the segment, ensiform,
pointed. Air-tube stout, tapered, slightly more than twice as long as