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IX]

THE MOSQUITO

149

domestic water-vessels, and occasionally in the water that collects in holes in trees; some species thrive in

Fig. 35.—Graphic key to generic distinctions based on scale characters.

a, b, c, Narrow-curved scales; d, e, f, hair-like curved scales; g, h, upright forked scales; i, j, long twisted scales; k, large lanceolate scale; l, m, small narrow lanceolate scales; n, large expanded scale; o, p, spindle-shaped scales; q, broad flat scale; r, s, broad irregular scales.

Fig. 36.—Graphic key to generic distinctions based on scale characters.

a, Anopheles, head, scutellum, and lateral view of head scales; b, Stegomyia, head, scutellum, and lateral view of head scales. c, Ædes, head and scuteuam scales.

Fig. 37.—Continuation of Fig. 36.

Megarhinus, head, scutellum, and lateral view of head scales; e, Culex, head, scutellum, and lateral view of head scales.

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