. Elementary entomology. Entomology. 58 ELEMENTARY ENTOMOLOGY The egg mass is from one half to three fourths of an inch long and forms a grayish-brown, knotlike band around the twig, closely resembling the bark in color. Each mass contains from one hun- dred fifty to two hundred fifty eggs, placed on end, packed closely together, and covered with a layer of light brown, frothy glue, which gives a tough, smooth, glistening surface to the whole mass. The eggs are deposited by the female moths by early midsummer; when fresh the egg mass is white, but in a few days the color darkens. Larva, or eat
. Elementary entomology. Entomology. 58 ELEMENTARY ENTOMOLOGY The egg mass is from one half to three fourths of an inch long and forms a grayish-brown, knotlike band around the twig, closely resembling the bark in color. Each mass contains from one hun- dred fifty to two hundred fifty eggs, placed on end, packed closely together, and covered with a layer of light brown, frothy glue, which gives a tough, smooth, glistening surface to the whole mass. The eggs are deposited by the female moths by early midsummer; when fresh the egg mass is white, but in a few days the color darkens. Larva, or eaterpillar. Dur- ing late summer the little cater- pillars are formed within the eggs, but do not hatch until the next spring. Often they emerge before the leaf buds have expanded sufficiently to furnish any food, in which case they satisfy their appetites with the glutinous covering of the egg mass, spinning over it a thin web. Soon they are able to bore into the swollen buds, when a web is commenced at the nearest crotch. Wild cherry and apple, which are often stripped of their foliage year after year, are the favorite foods, but all the common fruit trees are more or less frequented, and sometimes the common shade trees are attacked and occasionally one is defoliated. The family instinct is very strong with the young caterpillars and all from one egg mass cooperate in spinning the tent which furnishes them shelter at night and during cold or wet weather. The tent is gradually enlarged by new layers of silk, which cover the masses of excreta in the lower layers, the caterpillars living between the outer layers. They com- mence feeding soon after sunrise, but often retire to the nest during the heat of the day, and always seek its shelter during cold days or. Fiu. 74. Partly formed web of the tent caterpillar (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
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
