. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Insects, Injurious and beneficial. BAG-WORM MOTHS 207 usually have a series of prolegs or false legs developed on the abdominal segments. The more common number is ten, four pairs located on the central abdominal segments and one terminal pair. These are not homologous with the segmentally jointed appendages of insects generally. They stand out prominently and are fitted commonly with rows of small hooks or teeth at the margin. The larvse are elon- gate and generally cylindrical and are followed by a pupa st
. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Insects, Injurious and beneficial. BAG-WORM MOTHS 207 usually have a series of prolegs or false legs developed on the abdominal segments. The more common number is ten, four pairs located on the central abdominal segments and one terminal pair. These are not homologous with the segmentally jointed appendages of insects generally. They stand out prominently and are fitted commonly with rows of small hooks or teeth at the margin. The larvse are elon- gate and generally cylindrical and are followed by a pupa stage strikingly different from the larval stage and fre-. FiG. IGO.—Bag worm (Thyridopteryx ephemerceformis): a, full-grown larva; h, head of same; c, male pupa; d, female pupa; e, adult female; /, adult male. All enlarged. (From Howard, Div. Ent., U. S. Dept. Ag.) quently enclosed in a cocoon. This is a quiescent stage. The adult on issuing splits the pupal case along the dorsal portion and crowds its way out. Bag-worm Moths.—Among the lower forms are the bag- worm moths. These are forms in which the larvae construct a case or bag of bits of leaves or twigs with which to protect themselves. Almost parallel with the habit of the caddice flies. One of the most common is the evergreen bag worm {Thyridopteryx ephemercEformis). Its favorite fqod plants are conifera, red cedar, and arbor vitae. It occurs com-. 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 Osborn, Herbert, 1856-1954. Philadelphia, New York, Lea & Febiger
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1916
