Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] 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
Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] 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- -Q , a few uncommon species, and lack the whorls x of hairs of the male antennae. The black-flies (Simultidae). Another pest of mountain lovers is the black fly, the females of which are most bloodthirsty and often FIG. 356. (Four times natural size) a, larva ; b, pupa ; t, adult. (After Weed)
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