. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 392 ECONOMIC ZOOLOGY AND ENTOMOLOGY are much more serious pests, but fortunately they can be controlled by concerted action on the part of all of the stock owners in a community. After the larvae have attained con- siderable size they are easily detected as they lie under the skin on the backs of the cattle. When they are nearly ready to issue they can easily be squeezed out and destroyed. They. FIG. 180.—Body-louse, Pcdiciilits vestiincnti. (About eighteen times natural size.) may also be killed while still under
. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 392 ECONOMIC ZOOLOGY AND ENTOMOLOGY are much more serious pests, but fortunately they can be controlled by concerted action on the part of all of the stock owners in a community. After the larvae have attained con- siderable size they are easily detected as they lie under the skin on the backs of the cattle. When they are nearly ready to issue they can easily be squeezed out and destroyed. They. FIG. 180.—Body-louse, Pcdiciilits vestiincnti. (About eighteen times natural size.) may also be killed while still under the skin, but bad sores are apt to result if this is done so it is much better to squeeze them out. If all of the cattle owners in a community attend to this early each spring, it is evident that the number of bot-flies will soon be so reduced that they will cause little trouble. Lice.—There are two distinct groups of wingless parasitic insects commonly called lice. One group, the blood-sucking lice, belongs to the family Pediculidaz, order Hemiptera; the other, the biting lice, constitutes an independent small order, the. 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937; Doane, Rennie Wilbur, 1871-. New York, H. Holt and company
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