Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . andthey require for food, in the course of a season, a very large num-ber of specimens injurious to plant-life. The true wasps, or Vespidce, are distinguished from thediggers by the fact that the fore-wings are folded longitudinallywhen at rest, and this is a character easily seen and quite have among them solitary and social forms,—the solitarytypes so called because only the two normal sexes are present, andbecause they do not live in colonies. There is a gre
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . andthey require for food, in the course of a season, a very large num-ber of specimens injurious to plant-life. The true wasps, or Vespidce, are distinguished from thediggers by the fact that the fore-wings are folded longitudinallywhen at rest, and this is a character easily seen and quite have among them solitary and social forms,—the solitarytypes so called because only the two normal sexes are present, andbecause they do not live in colonies. There is a great variationin habit, and we find species that bore in woody tissue, somethat inhabit pithy plants, some that burrow in the earth, and others that make mudnests. The mud nestsvary in form and areoften quite pretty, Eiunencs resemblinga jug or vase attached tothe twigs and stems ofplants. It is not alwayspossible to distinguish be-tween the cells and nestsof the diggers and thoseof the true wasps, andpractically it is a matterof no importance, because—that is, they store theirlarvae feed. All solitary. liaternal potter-wasp, Eumenes fraterna.—a,wasp ; b, its cell; c, same broken open to show thecaierpillars stored in it. the habits of the insects arc similar, cells with insects upon which their wasps are beneficial, therefore, and should be encouraged by the farmer. iMc;. 45S;.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1906
