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

CULICINI 18.5
adults are not persistent biters and are said to fly after sun-
set.
THEOBALDIA INCIDENS Thomson
C&x incidew Thomson, Kongl. Sven. Erg. Resa, 6, Dipt.,
443. 1868.
C&x particeps Adams, Kans. Univ. Sci. Bull. (2) 2, 26. 1903.
Female. Length 5-6.5 mm.; wing 5-6 mm. Proboscis long, slen-
der, brownish-black. Occiput black with brownish narrow scales
medianly, broad, flat white ones on the cheeks, and numerous erect,
forked black scales. Mesonotum dark brown with narrow bright
yellow scales arranged in obscure longitudinal narrow stripes or
spots. Abdomen black with basal segmental bands of whitish scales;
venter white scaled. Legs dark brown; femora and tibiae narrowly
tipped with white; some tarsal joints faintly marked with a basal
yellowish band, most distinct on the hind legs. Wing scales black,
aggregated into patches (at base and forks of second vein, at middle
and forks of fourth vein, upper fork of fifth and middle of sixth
veins) giving a spotted appearance to the wing.
Male hypopygium (Fig. 5, Pl. XVII.) Side-pieces more than
twice as long as wide, stout, rounded apically ; apical lobe small bear-
ing a narrowly ligulate, long spine and a group of setae; basal lobe
sharply conical, bearing two approximate, stout spines on the apex.
Clasper stout, gradually tapering. Claspettes absent. Mesosome
cylindrical, stout, consisting of two heavily chitinized halves, narrow-
ly open along the ventral median line, broadly open on the dorsum,
except near the tip. Lobes of the ninth tergite, short, chitinized;
each bears a row of rather long setae. The eighth segment bears a
group of 5-8 short, stout spines on its median ventral margin.
Larva. Length 9-10 mm. Head rounded, wider than long; an-
tenna not as long as the head, faintly spined, a multiple tuft at middle;
upper and lower head hairs multiple; anteantennal tuft multiple.
Abdominal lateral tufts multiple on first and second, double on the
third to sixth segments. Lateral comb of eighth segment a large
triangular patch of many scales. Anal segment wider than long,
ringed by the dorsal plate; dorsal brush a long tuft and a shorter
multiple tuft each side; ventral brush large with several tufts in
front of the barred area and these puncturing the dorsal plate. Air-
tube twice as long as wide; pecten with a few basal teeth followed
by long setae which reach the apical third; tuft multiple. at base be-
tween the pecten.