. Economic entomology for the farmer and fruit-grower. Beneficial insects. 250 AN ECONOMIC ENTOMOLOGY. common eastern species, extending westward to the Rocky- Mountains, is C. philodice, whose larva feeds upon clover. It is a green caterpillar somewhat similar to the " cabbage-worm," but although it maybe quite abundant, rarely does injury enough to be noticed. As a rule, the larva is rather difficult to find, even where the butterflies are abundant, and practically no measures need be taken against it. In the sub-family PapilionincB we have in our country only the typical genus Pap
. Economic entomology for the farmer and fruit-grower. Beneficial insects. 250 AN ECONOMIC ENTOMOLOGY. common eastern species, extending westward to the Rocky- Mountains, is C. philodice, whose larva feeds upon clover. It is a green caterpillar somewhat similar to the " cabbage-worm," but although it maybe quite abundant, rarely does injury enough to be noticed. As a rule, the larva is rather difficult to find, even where the butterflies are abundant, and practically no measures need be taken against it. In the sub-family PapilionincB we have in our country only the typical genus Papilio, containing species abundant enough to become of economic importance. The most common of these is Fig. Papilio as/t'iias, male. P. asterias, a black " swallow-tail," expanding between two and three inches, the hind wings tailed and excavated on the inner margin, so that the abdomen is free, not enfolded in a groove. The male is somewhat smaller than the female, and has a diag- onal row of yellow spots crossing the fore-wings outwardly and the hind wings nearly across the centre. Near the outer margin of both wings there is a row of yellow, lunate spots, and at the inner angle of the hind wings is a peculiar, eye-like spot, just at the margin. The female has the inner row of yellow spots very much reduced, sometimes altogether wanting, but on the hind wings the space between the faint series of yellow spots and the outer lunules is beautifully powdered with metallic blue scales. These butterflies lay their eggs on carrots, parsley, and other plants of the same natural family, and from them hatch bright. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, John Bernhard, 1858-1912. Philadelphia and London, J. B. Lippincott company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbenefic, bookyear1906
