. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. ^rfiSiiff&MA^ Tig. 2.—Constricted cocoon, with fine texture (original).. Fig. 3.—Non-constricted cocoon, with coarse texture (original). of loose silk known as " floss," which is used for carding, and is spun by the worm in first getting its bearings. The amount of this loose silk varies in different breeds. The inner cocoon is tough, strong, and com- pact, composed of a firm, continuous thread, wliich is, however, not wound in concentric circles, as might be supposed, but irregularly, in short figu
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. ^rfiSiiff&MA^ Tig. 2.—Constricted cocoon, with fine texture (original).. Fig. 3.—Non-constricted cocoon, with coarse texture (original). of loose silk known as " floss," which is used for carding, and is spun by the worm in first getting its bearings. The amount of this loose silk varies in different breeds. The inner cocoon is tough, strong, and com- pact, composed of a firm, continuous thread, wliich is, however, not wound in concentric circles, as might be supposed, but irregularly, in short figure-of-8 loops, first in one place and then in another, so that, in reeling, several yards of silk may be taken off' without the cocoon turn- ing around. In form the cocoon is usually oval, and in color yellowish, but in both these features it varies greatly, being either pure silvery- white, cream, or carneous, green, or even roseate. The Chrysalis.—The chrysalis is a brown, oval body, considerably less in size than the full-grown worm. In the external integument may be traced folds corresponding with the abdominal rings, the wings folded over the breast, the antennae, and the eyes of the inclosed insect—the future moth. At the posterior end of the chrysalis, pushed closely up to the wall of the cocoon, is the last larval skin, compressed into a dry wad of wrinkled integument. The chrysalis state continues for from two to three weeks, when the skin bursts and the moth emerges. The Moth.—With no jaws, and confined within the narrow space of the cocoon, the moth finds some difficulty in escaping. For this pur- pose it is provided, in two glands near the obsolete mouth, with a strongly alkaline liquid secretion, with which it moistens the end of the. 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 Uni
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Keywords: ., bookcentury1800, booksubjectentomology, booksubjectinsects, booky
