. Insect life; an introduction to nature study and a guide for teachers, students and others interested in out-of-door life. Entomology; Nature study. FOREST LIFE. 205 When a bag-worm is fully grown, it fastens its sac to a twig and changes to a pupa within it. And here the females remain until death, leaving their eggs within their sacs. These females are grublike creatures without wings. But the male pupa works his way out from the lower end of his sac, and changes to a winged moth. Fig. 172 represents the. Fig. 172. Fig. 173. Fig. 174. sac of a male with the empty pupa skin projecting from
. Insect life; an introduction to nature study and a guide for teachers, students and others interested in out-of-door life. Entomology; Nature study. FOREST LIFE. 205 When a bag-worm is fully grown, it fastens its sac to a twig and changes to a pupa within it. And here the females remain until death, leaving their eggs within their sacs. These females are grublike creatures without wings. But the male pupa works his way out from the lower end of his sac, and changes to a winged moth. Fig. 172 represents the. Fig. 172. Fig. 173. Fig. 174. sac of a male with the empty pupa skin projecting from the lower end, and Fig. 173 the fully developed male. These figures are of one of our smaller species. Fig. 174 represents the male of one of the larger species. OTHER LARGER LEAF-EATING CATERPILLARS. In addition to the species mentioned above, there are very many of the larger caterpillars that infest the foliage of forest trees. Any one of these, may be taken as a subject for study, and the work carried on in the manner outlined for the study of similar orchard insects. See page 172. THE SMALLER LEAF-EATING CATERPILLARS. There is an immense number of small caterpillars that infest the foliage of forest trees. Of this number, the majority of those that would attract the attention. 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 Comstock, John Henry, 1849-1931; Comstock, Anna Botsford, 1854-1930. New York, D. Appleton and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectentomol, bookyear1901
