. Elementary entomology. Entomology. GROWTH AND TRANSFORMATIONS OF INSECTS 59. when the sky becomes clouded and rain threatens. While young they feed together, each little caterpillar spinning a fine strand of silk wherever it goes, which forms a sort of trail for the others. They become full grown in six or seven weeks, during which time they have molted some four or, excep- tionally, five times, at intervals of eight or nine days, though the length of time between molts varies widely according to the food supply and weather conditions. After the fourth molt the fifth stage occupies about two
. Elementary entomology. Entomology. GROWTH AND TRANSFORMATIONS OF INSECTS 59. when the sky becomes clouded and rain threatens. While young they feed together, each little caterpillar spinning a fine strand of silk wherever it goes, which forms a sort of trail for the others. They become full grown in six or seven weeks, during which time they have molted some four or, excep- tionally, five times, at intervals of eight or nine days, though the length of time between molts varies widely according to the food supply and weather conditions. After the fourth molt the fifth stage occupies about two weeks before the caterpillar transforms to the pupa. When full grown they become extremely restless, wan- der away from the nest, and are frequently encountered on walks and roadsides, and feed on al- most any plant found. They are now about two inches in length, deep black in color, thinly covered with yellowish hairs, with a white stripe dowTi the mid- dle of the back. At the middle pi^. 76. Full-grown tent caterpillars on web. (Reduced) of the side of (Photograph by Weed) Fig. 7 5. Tent caterpillars about half grown on web (Photograph by Weed). 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 Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882; Metcalf Collection (North Carolina State University). NCRS. Boston, Ginn
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
