Entomologia economica per l'agricoltore e frutticoltore : e per l'uso come testo-libro in scuole agricole e collegi . la Tineina, o i Tineidmoti, che comprende il più piccolo dei Lepidotterous insetti.There è un numero enorme di specie, e sappiamo verylittle circa la grande maggioranza di loro. Con poche eccezioni, i teinsetti hanno ali lunghe e strette, le primitive appuntite, il sec-ondaries lanceolato, ma la loro superficie è aumentata da enormi frange lunghe, che in molti casi sono più ampi dei wingsé. Spesso hanno sulla testa un abbigliamento di montante 324 UN ENTOMOLOG ECONOMICO

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Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . the Tineina, or the Tineidmoths, comprising the smallest of the Lepidopterous insects.There is an enormous number of species, and we know verylittle about the great majority of them. With few exceptions, theinsects have long, narrow wings, the primaries pointed, the sec-ondaries lanceolate, but their surface increased by enormouslylong fringes, which are in many cases broader than the wingsthemselves. They often have on the head a clothing of upright 324 AN ECONOMIC ENTOMOLOGY. divergent scales, all of one height, giving somewhat the appear-ance of a little plush cap. In their life habits they vary much.Some are leaf-miners, living between the upper and under sur-faces, and each species eating out characteristic galleries tliat arevisible as irregular brown lines or blotches. Others are case-bearers, making little houses of various shapes and texture, which they carry about with them, and in which they live, pro-jecting the head and anterior segments just far enough to feed. Fig. 373.. Apple case-bearer, Coleophora malivorella.—a, larval cases; b, larva; c, pupa;d, adult moth. but retreating at the first signs of disturbance. A few feed openly, while others are borers in fruits, seeds, or even twigs. Among the best known are the clothes moths, —little, yel-lowish creatures often seen flying in houses early in the evening, and which generally arouse excitement and resentment in thebreast of the careful housekeeper, for she knows that her woollensand furs are in danger. The caterpillars feed upon animal tex-tiles of all kinds, and upon furs and feathers. They do not oftenattack vegetable fibre like cotton or linen. Their habit is toform a little flattened case of fibres from the material upon whichthey are feeding, and this is lined on the inner side with silk. Inabout three weeks the larva is full fed, changes to a pupa withinits case, and the moth,

Parole chiave associate all'immagine

• bookcentury1900
• bookdecade1900
• booksubjectinsectp
• bookyear1906