Elementary entomology (1912) Elementary entomology elementaryentom00sand Year: 1912 226 ELEMENTARY ENTOMOLOGY They are grayish-black, not over one twenty-fifth of an inch long, and the larvae develop in the water in stumps and logs and under damp, dead bark. The net-winged midges (Blepharoceridae) are so called on account of the peculiar network of small veins crossing the main wing- veins around the margin of the wing, which are peculiar to this family. The small, black larvae live in masses on the rocks in swift-running moun- tain streams, and seem to have but seven segments strongly constr
Elementary entomology (1912) Elementary entomology elementaryentom00sand Year: 1912 226 ELEMENTARY ENTOMOLOGY They are grayish-black, not over one twenty-fifth of an inch long, and the larvae develop in the water in stumps and logs and under damp, dead bark. The net-winged midges (Blepharoceridae) are so called on account of the peculiar network of small veins crossing the main wing- veins around the margin of the wing, which are peculiar to this family. The small, black larvae live in masses on the rocks in swift-running moun- tain streams, and seem to have but seven segments strongly constricted at each joint. The Dixa-midges (Dixidae) include but a single genus, whose larvae are also aquatic. Both of the last families com- prise only a few uncommon species, and lack the whorls of hairs of the male antennae. Fig. 356. A black fly [Simuliiim venitsUitii) (Four times natural size) (7, larva; b, pupa ; c, adult. (After Weed) The black-flies {Simuliidae). Another pest of mountain lovers is the black fly, the females of which are most bloodthirsty and often
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