. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. ATTACKING THE LEAVES. 103 It lives in societies, making its home in a mass of half-eatea and browned leaves, drawn together by silken threads, from which it drops, when the tree or branch is jarred, suspended in the air by a thread of silk. The larva is of a pale yellowish- green color, with a dusky or blackish stripe along each side, edged above by a narrow whitish stripe; there is also a dusky line along the middle of the back. Its head is shining yel- low, and the top of the next segment is of th
. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. ATTACKING THE LEAVES. 103 It lives in societies, making its home in a mass of half-eatea and browned leaves, drawn together by silken threads, from which it drops, when the tree or branch is jarred, suspended in the air by a thread of silk. The larva is of a pale yellowish- green color, with a dusky or blackish stripe along each side, edged above by a narrow whitish stripe; there is also a dusky line along the middle of the back. Its head is shining yel- low, and the top of the next segment is of the same color; on each ring there are several small black dots, from each of which arises a fine yellow hair. While young, the caterpillars eat only the green pulpy tissue of the leaves, leaving the net- work of veins entire; later on, they consume^ the whole of the leaf except its coarser veins. They also frequently gnaw holes or irregular cavities in the young apples. These larvae feed on the leaves of the cherry as well as those of the apple. When full grown, they are about half an inch long. They then change to chrysalids within the mass of eaten leaves oc- cupied by the larvse, and ordinarily spin a slight cocoon in a fold of a leaf, but when they are very abundant the foliage is so entirely consumed that they have to look for shelter elsewhere. Their chrysalids are then often found under dry leaves on the surface of the ground, in crevices in the bark of the tree, and in other suitable hiding-places. The chrysalis is about a quarter of an inch long; at first it is of a tawny- yellow color, which gradually changes to a darker hue. In ten or twelve ^i®- 9^- days the perfect insect is produced. The moth (Fig. 99) is of an ash-gray color. The fore wings are sprinkled with black atoms, and have four black dots near the middle, and six or seven smaller ones along the hinder margin. The hind wings are dusky above and beneath, with a glossy azure-blue reflection, blackish veins,
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherphila, bookyear1883
