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

86 MOSQUITOES OF NORTH AMERICA
outer third of costa involving first and second veins; a smaller patch
on same veins close to apex of wings; fourth vein with two small
spots on stem and usually one on each fork; sixth vein with a patch
before the middle. Legs black, the tips of femora and tibiae narrowly
yellowish-white.
iWale hypopygizlm. (Pl. IX, 4.) Side-piece nearly twice as long as
wide, conical. Internal spine prominent, arising one-third from apex
of side-piece. A pair of stout basal spines present, each arising from
a large chitinized tubercle. Claspers longer than side-piece, nar-
rowed in the middle. Each claspette is a stout, bilobed organ reach-
ing to near the apex of mesosome; dorsal lobe with two closely set,
blunt spines ; ventral lobe with an outer large, broad, sharp-pointed
spine and an inner smaller spine; midway between these spines is a
fine hair. Mesosome long and narrow with four pairs of slender
leaflets at apex. Ninth tergite consists of a narrow chitinous band
with two broad lateral processes.
Lama. (Fig. g14.) Length 8 mm. Head longer than wide, front
conically produced ; a pair of long setae on front margin; a pair
of branching hairs on the clypeal margin dorsad of the mouth
brushes. Dorsal head hairs six, plumose, arranged in an irregular line
between the bases of the antennae. At the base of each antenna is a
single plumose hair. Four small plumose hairs lie in a curved line
in front of and between the eyes. Antenna spinous with a small
tuft on the basal third. Thorax longer than wide; hairs consist
of tufts, branched hairs, single hairs and plumose hairs. Abdomen
stout, the anterior segments shorter; first three segments with long
plumose hairs, double on the first and second, single on the third. A
dorsal series of fan-shaped tufts on the third to seventh segments.
Each lateral plate of the eighth segment broadly triangular, armed
on the caudal margin with a series of long and short spines, varying
in number from 17 to 22 (6 to 7 long). Anal segment longer than
wide with a large dorsal plate. Dorsal brush consists of a long and
shorter hair tuft on either side; ventral brush of many, long, branched
tufts. Anal gills as long as the segment, bluntly pointed.
This is the most widespread species of Anopheles in North
America, ranging through southern Canada south to the Mexi-
can plateau. It breeds in almost any situaton where suitable
water is present. I have found the larvae in rain-water bar-
rels, roadside puddles, ruts in muddy roads, grassy bogs, all
sorts and kinds of swamps, hog wallows reeking with filth,
spring pools, margins of streams, lakes and open ponds. I have