. Elementary entomology. Entomology. they eat more of the leaf sub- stance, devouring all but the midrib and veins when half grown, and, when larger, leave only the midrib. The carpet- like web which they spin also becomes more evident as they grow older, often binding to- gether the ends of near-by twigs, especially where the caterpillars rest after feeding. The full- grown caterpillar is about two inches long, with numerous branched black spines. It is blackish in color, with a row of red spots down the back, and with transverse rows of minute white spots. Pupa, or cJirysalis. The caterpilla
. Elementary entomology. Entomology. they eat more of the leaf sub- stance, devouring all but the midrib and veins when half grown, and, when larger, leave only the midrib. The carpet- like web which they spin also becomes more evident as they grow older, often binding to- gether the ends of near-by twigs, especially where the caterpillars rest after feeding. The full- grown caterpillar is about two inches long, with numerous branched black spines. It is blackish in color, with a row of red spots down the back, and with transverse rows of minute white spots. Pupa, or cJirysalis. The caterpillars are full grown in about four weeks. Dr. Weed, in his interesting account of this spe- cies, describes its transformation as follows : They then leave the tree or shrub on which they have been feeding, and scatter about, seeking some sheltered situation. Having found this, â perhaps beneath a stump or along the underside of a fence, --= each caterpillar spins a web of silk along the surface. It then entangles the hooked claws of its hind legs (anal prolegs) in this silken web and lets its body hang vertically with the head end curved upward. It remains in this position for some hours before the skin along the back just behind the head splits apart, and is gradually wriggled upward until it is finally all removed, and there hangs in place of the caterpillar a peculiar object having no definite form â that of the chrysalis} In this quiet chrvsalis the insect is apparendy ^^°- ^5- Mourning cloak 1 X â ^ ' Tr .. 1 -^ â¢.. butterfly emerging from almost as niert as a mummv. If you touch it, it -^ , f. '^ â¢' chrysalis 1 See Fig. 83. (Photograph by Weed) Fig. 84. Twigs denuded by spiny elm cater- pillars, bearing their cast skins. (Reduced) (Photograph by Weed). 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
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
