Identifier: insectsinsectic00weed (find matches)
Title: Insects and insecticides : A practical manual concerning noxious insects and the methods of preventing their injuries
Year: 1904 (1900s)
Authors: Weed, Clarence Moores, 1864-1947 Metcalf Collection (North Carolina State University). NCRS
Subjects: Insect pests Insecticides
Publisher: New York : Orange Judd Company
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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etimesfound upon the surface of the water, on w^hich they hopabout as easily as on land. Certain others are some-times found on the surface of snow, in midwinter. Thespecies live on dead or decaying vegetable substances andupon fungi, and in turn furnish food for a great manykinds of predaceous forms. (Smith.) None of themare of material economic importance. The next higher order of insects is called the Pseu-doneuroptera. It includes the dragon flies. May flies,stone flies and similar forms. These insects have fourmembranous net-veined wings, with biting mouth partsand incomplete transformations. The life history ofthe common dragon fly may serve to illustrate the biol-ogy of this group. The eggs are laid on the stems orleaves of aquatic jilants by the adult dragon flies, andsoon hatch into small larvae that live in the water, prey-ing upon mosquito w^rigglers and other aquatic in-sects. They are provided with a kind of triangular-shaped jaw, with a sharp pair of scissors at the end;
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THE ORDERS OF INSECTS 15 this is called the mask. It is usually concealed underthe head of the larva, but when an insect comes withinreach it is suddenly thrust out, grasps the victim andreturns to its concealed position. The larva growsgradually, and finally crawls up out of the water onsome reed, when its skin splits open along the back andthe adult dragon fly appears. These insects are preda-ceous in all stages of their existence. The order of insects to which grasshoppers, crick-ets, katydids and similar creatures belong is called theOrtlioptera, a word meaning straight-winged.. Theinsects of this order have four wings, the first pair beingthickened, and, when at rest, overlapping the second,which are folded in longitudinal plaits. The transfor-mations are incomplete, the young resembling the adultsin general appearance. The mouth parts are formed forbiting rather than sucking. The first important family of the Orthoptera is thatof the cockroaches (BlattidcB), There are many speci

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