Nature Bulletin No. 19 June 16, 1945
Forest Preserve District of Cook County
Clayton F. Smith, President
Roberts Mann, Superintendent of Conservation
There are many different kinds of mosquitoes. Of the 135 species found
in the United States, 32 have been found in Cook County and 22 of
these are most common, We do not have the yellow fever mosquito but
we do have a few of two species of the Anopheles mosquito which
transmits malaria. These are recognized by their spotted wings and the
tipped up position of the body when resting -- perpendicular to
whatever surface upon which it clings, as if it were standing on its head.
So far, cases of malaria have occurred rarely in Cook County and
mosquito abatement has been conducted because mosquitoes are a
serious nuisance. Mosquitoes are annoying because of the bites which
hurt, swell and itch.
The male mosquito cannot bite. He feeds on the juice of plants. He can
be recognized by his bushy, plume-like antennae, or feelers, which
serve as ears to hear the song of the females. Each species has its own
song, produced by an apparatus at the base of the wings.
The female has slim, simple antennae and is equipped with a high-speed
drill for boring through the skin of humans and other animals. Through
it she pumps a "poison" to keep blood from coagulating, and through it
she sucks that blood which she must have to fill her abdomen in order
that her eggs may develop. It is this "poison" which causes the bite to
swell and itch.
Next week we will tell you about the different kinds of mosquitoes we
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Update: June 2012