eles_ mosquito is at rest the head and proboscis are held in one
line with the body and the body rests at a considerable angle to the
surface on which it is standing. Other kinds rest with the body almost
or quite parallel to the surface on which they are standing. So if you
find a female mosquito with long mouth-palpi and spotted wings resting
at an angle to the surface on which it stands you may be reasonably sure
that it is an _Anopheles_ and therefore may be dangerous (Figs. 76, 77,
78, 79).

In the United States there are three species of
_Anopheles_--_maculipennis_, _punctipennis_ and _crucians_--which are
common in various localities, and one or two other species that so far
as known are local or rare.

The _Anopheles_ eggs are not laid in masses as are the eggs of many
other mosquitoes, but are deposited singly on the surface of the water
where they may be found often floating close together.

[Illustration: FIG. 80--Egg of Anopheles, side view. (After Nuttall and
Shipley.)]

[Illustration: FIG. 81--Egg of Anopheles, dorsal view. (After Nuttall
and Shipley.)]

[Illustration: FIG. 82--Anopheles larvae, the one to the right feeding.]

[Illustration: FIG. 83--Anopheles larvae, the one to the right feeding,
the other just coming to the surface.]

[Illustration: FIG. 84--Anopheles larva, dorsal view.]

[Illustration: FIG. 85--Anopheles pupae resting at surface of water.]

The eggs (Figs. 80, 81) are elliptical in outline and are provided with
a characteristic membranous expansion near the middle.

The larvae may be found at the proper season and in the localities where
they are abundant in almost any kind of standing water, in clear little
pools beside running streams, in the overflow from springs, in swamps
and marshy lands, in rain-barrels or any other places or vessels where
the water is quiet. They do not breed in brackish water. As they feed
largely on the algae or green scum on the surface of the water they are
especially apt to be found where this is present. We have already noted
that their positions in the water differ from that assumed by other
species (Fig. 82).

As the breathing-tube is very short the larvae must come close to the
surface to breathe, and when they are feeding we find them lying just
under and parallel to the surface of the water with their curious round
heads turned entirely upside down as they feed on the particles that are
floating on the surface (Figs. 83, 84).

The pupa