. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. Ob. Fig. 3.—The chrysalis: a, silkworm completing its cocoon; 6, cocoon and chrysalis—cast-off skin of larva beneath; c, back view of chrysalis; rf, side view of chrysalis. (Redrawn from Maillot.) state lasts from eighteen to twenty days, according to the temperature. Then the metamorphosis is complete, and the sheath breaks in the region of the head and out of the old case the moth or perfect insect issues. THE MOTH. The larva in spinning the cocoon leaves one end the threads open freely to permit the egress of
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. Ob. Fig. 3.—The chrysalis: a, silkworm completing its cocoon; 6, cocoon and chrysalis—cast-off skin of larva beneath; c, back view of chrysalis; rf, side view of chrysalis. (Redrawn from Maillot.) state lasts from eighteen to twenty days, according to the temperature. Then the metamorphosis is complete, and the sheath breaks in the region of the head and out of the old case the moth or perfect insect issues. THE MOTH. The larva in spinning the cocoon leaves one end the threads open freely to permit the egress of the of an alkaline Huid the moth sof- tens and parts the threads and lib- erates itself. The moth (fig. 4) comes out of the cocoon, as the larva out of the ^y^^-, ii^ the early morning hours. It has a distinct head, thorax, and abdomen,- four wings, two coml)-shapedantenna?, three pairs of legs, and a pair of compound eyes. Shortly after emerging, the moth deposits a liquid substance, generally white, sometimes color- less and sometimes reddish, and then the union occurs, lasting sev- eral hours, after which the eggs are laid either immediately or in the course of four or five hours. A gelatinous substance supplied l)y two glands of the oviduct covers the &^^^ as they come out, adhere to the substance on which they are laid. less dense, so that moth. By the aid. 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 United States. Bureau of Entomology. Washington : G. P. O.
Size: 939px × 2661px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectentomology, booksubjectinsects, booky
