Economic entomology for the . economicentomolo00smit_0 Year: 1896 244 A A' ECONOMIC EXTOMOLOGY. We have many species of considerable size belonging to the genus Argynnis^ which resemble each other more or less by in color, with irregular black or blackish blotches, spots, and lines, and a little silvery mark resembling a comma or semicolon on the hind wings beneath. Of these the caterpillar of G. comma feeds upon the hop-vine, although it rarely does any serious injury. It is reddish or yellowish in color, with a black head and black branched spines, and forms an angular chrj^salis w
Economic entomology for the . economicentomolo00smit_0 Year: 1896 244 A A' ECONOMIC EXTOMOLOGY. We have many species of considerable size belonging to the genus Argynnis^ which resemble each other more or less by in color, with irregular black or blackish blotches, spots, and lines, and a little silvery mark resembling a comma or semicolon on the hind wings beneath. Of these the caterpillar of G. comma feeds upon the hop-vine, although it rarely does any serious injury. It is reddish or yellowish in color, with a black head and black branched spines, and forms an angular chrj^salis which is suspended by the tail. The chrysalis is yellowdsh green in color, with prominently marked segments, and has the thorax produced into a somewhat acute process. Another very common, almost cosmopolitan butterfly, is the Vanessa ayitiopa^ popularly known as the 'mourning-cloak.' It is of a very dark, rich-brown color, with a broad yellowish border on both wings. It winters in the butterfly stage, and may often be seen on w^arm days in midwinter, fluttering about in the woods, w^hile it is the earliest of the butterflies to make its appearance in spring. The caterpillars feed upon quite a variety of plants, notably willow^ and poplar, and often in great colonies. When full grown they are two inches or more in length and black, with red-marked, branched spines. The chrysalis is suspended by the tail, and of a somewhat mouse-gray color, the segments marked with acute spines. This may under circumstances be- come a troublesome insect, but it is easily controlled, either by arsenical poisons, as the caterpillar feeds exposed, or by hand- picking, which is easy because of the gregarious habit when Grapta progne.—'Xs'Wig's, of right side detached to show under side; this is almost like G. comma. Fig. 254. their tawny upper sides marked with black spots, and by having the under sides more or less marked wdth silvery blotches, es- pecially on the hind wings. None of them are i
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