. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. 84 INSECTS INJURIOUS TO THE APPLE. the same time giving off a disagreeable odor, which is doubt- less used as a means of defence against its enemies. On each side of the third segment is an eye-like spot, nearly oval^ yellow, enclosed by a ring of bJack, centred with a small elongated blue dot, which is also set in black. On the hinder portion of the fourth segment is another raised yellow fold, bordered behind with rich velvety black; the latter is seen only when the larva is in motion. On the term
. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. 84 INSECTS INJURIOUS TO THE APPLE. the same time giving off a disagreeable odor, which is doubt- less used as a means of defence against its enemies. On each side of the third segment is an eye-like spot, nearly oval^ yellow, enclosed by a ring of bJack, centred with a small elongated blue dot, which is also set in black. On the hinder portion of the fourth segment is another raised yellow fold, bordered behind with rich velvety black; the latter is seen only when the larva is in motion. On the terminal segment there is a similar fold, flattened above, with a slight protu- berance on each side. On the fifth segment are two blue dots, one on each side, and there are traces on the hinder segments of similar dots, arranged in longitudinal rows. The under surface is paler than the upper, with a whitish bloom. \ When the caterpillar is about to change to a chrysalis^ which is usually during the early part of August, the color of the body grows gradually darker, until it becomes dark reddish brown, with the sides nearly black, and the blue dots become much more distinct. Having selected a suitable spot in which to pass the chrysalis state, it spins a web of silk, into which the hooks on the hind legs are firmly fastened f then, having prepared and stretched across a silken band or loop to support its body in the middle, it casts its larval skin^ and remains a dull-brown chrysalis, of the Fig. 82. form shown in Fig. 82, until the following spring. This insect is very widely distributed,, being found in nearly all parts of the United States and Canada. The caterpil- lar feeds on a number of different trees, but chiefly affects the apple, cherry, thorn, and basswood. As it is always solitary in its habits, it is never likely to cause much injury. South of Pennsylvania the female of this species of butterfly usually loses its yellow color and becomes nearly black, while the other s
Size: 1534px × 1629px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublisherphila, bookyear1883
