. Introduction to zoology; a guide to the study of animals, for the use of secondary schools;. d, two-spotted one (Adaliai>pun data). The food of beetles is, as wehave seen, extremely varied, pIG. <;i. more varied, indeed, than that of Anbtisocel-FIG. CO.—Pupa of ,, if-- lata. Adult. Aiiatisvcellutaon anJ Other Order Ot insects ; WOOd- Nat. size. a leaf. Nat. size, fibre, bark of living or dead trees, Photo- b^ Photo, by , leat and stem tissue, nuts, truits, grains, insects, adult and larval and dead animals of vari-ous sorts, are all utilized by them as food. Those beetles
. Introduction to zoology; a guide to the study of animals, for the use of secondary schools;. d, two-spotted one (Adaliai>pun data). The food of beetles is, as wehave seen, extremely varied, pIG. <;i. more varied, indeed, than that of Anbtisocel-FIG. CO.—Pupa of ,, if-- lata. Adult. Aiiatisvcellutaon anJ Other Order Ot insects ; WOOd- Nat. size. a leaf. Nat. size, fibre, bark of living or dead trees, Photo- b^ Photo, by , leat and stem tissue, nuts, truits, grains, insects, adult and larval and dead animals of vari-ous sorts, are all utilized by them as food. Those beetleswhich destroy living plants, or which feed on fruitsand grains utilized by man, those which burrow in tim-ber, devour meat or articles of humanindustry and collections prized by man,may be ranked as economically injuri-ous. One species, indeed, is injuriousas a parasite of a useful animal; this isa curious beaver parasite, Platypsylla 1castoria,2 In so far as certain predaceousbeetles feed upon other carnivorousspecies of insects, as do certain tigercarrion beetles, or upon small fish,. FIG. fi2. — Platypsyllacastoria, the beaver as do some of the Dytiscidse, or upon parasite. From -• j. • i TI • -IT Packard. domestic bees, like certain allies ot the weevils, they may be indirectly injur-ing man. Of all the families of beetles, probably the leaf-eaters cause greatest destruction; next to them come theweevils, followed by the Cerambycidse and the others. s, broad; \j/v\\a, a flea. 2 Fte. 62. THE BEETLE AND ITS ALLIES 57 Every part of the plant has its coleopterous enemy. AsLe Conte and Horn have said: As the function of theCerarabycidse is to hold the vegetable world in check bydestroying woody fibre, the Brnchidiu (weevils) effect asimilar result by attacking the seeds, and the Chrysome-lidte by destroying the The list of beetles directly or indirectly useful to manis small. The carrion-beetles, tumble-bugs, and rove-beetles, which feed upon decaying anim
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1900
