. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. 256 ECONOMIC ENTOMOLOGY peculiar clasping base, often several to a hair; i^^s inch long; dull yellowish-white; narrow; ovoid. Larva.—Dr. Cooper Curtice of Washington believed that the eggs were licked into the mouth and the maggots bored through the wall of the oesophagus, whence they gradually made their way to the tissues along the back, causing warbles. Miss Ormerod, of England, on the other hand maintained the popu
. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. 256 ECONOMIC ENTOMOLOGY peculiar clasping base, often several to a hair; i^^s inch long; dull yellowish-white; narrow; ovoid. Larva.—Dr. Cooper Curtice of Washington believed that the eggs were licked into the mouth and the maggots bored through the wall of the oesophagus, whence they gradually made their way to the tissues along the back, causing warbles. Miss Ormerod, of England, on the other hand maintained the popular belief that the eggs were laid on the back, but Carpenter of Ireland, and more lately Dr. Hadwen of Canada, have proven fairly. Fig. -The striped warble fly {Hypoderma Hadwen.) linealum). Enlarged. {After conclusively that the eggs may be laid on almost any part of the body of the animal, and that the maggots bore into the skin where lesions and swellings are produced. They finally make their way to the back where the warbles are formed. Full grown maggots are greyish-white and nearly an inch long. When mature they make their way out through the minute opening, drop to the ground and bore an inch or so below the surface, where they change to pupae. Four stages of larva; duration 9-10 months. Pupa.—Puparium dark brown. Duration 3-6 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 Lochhead, William, 1864-1927. Philadelphia : Blakiston
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
