Handbook of medical entomology . ^Preventive and remedial workagainst mosquitoes or, in moresummarized form, in FarmersBiilletin No. 444. One of theseshould be obtained by any personinterested in the problems of mos-quito control and public 74. Mouth parts of Simulium. AfterGriinberg. The SimuliidaB, or Black Flies The Simuliidae, or black flies, are small, dark, or black flies, witha stout body and a hump-back appearance. Theantennae are short but eleven-segmented, the wingsbroad, without scales or hairs, and with the anteriorveins stout but the others very weak. The mouth-parts (fig
Handbook of medical entomology . ^Preventive and remedial workagainst mosquitoes or, in moresummarized form, in FarmersBiilletin No. 444. One of theseshould be obtained by any personinterested in the problems of mos-quito control and public 74. Mouth parts of Simulium. AfterGriinberg. The SimuliidaB, or Black Flies The Simuliidae, or black flies, are small, dark, or black flies, witha stout body and a hump-back appearance. Theantennae are short but eleven-segmented, the wingsbroad, without scales or hairs, and with the anteriorveins stout but the others very weak. The mouth-parts (fig. 74) are fitted for biting. The larvce of the Simuliidae (fig. 75) are aquaticand, unlike those of mosquitoes, require a well aerated,or swiftly running water. Here they attach to stones,logs, or vegetation and feed upon various micro-organisms. They pupate in silken cocoons open atthe top. Detailed life-histories have not been workedout for most of the species. We shall consider astypical that of Simulium pictipes, an inoffensivespecies widely distributed in the Eastern UnitedStates, which has been studied especially at Ithaca, (Johannsen, 1903). The eggs are deposited in a compact yellowish layeron the surface of rock, on the brinks o
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1915
