. Smithsonian miscellaneous collections. Fig. 9.—Examples of insects having the biting-and-chewing type of mouthparts that live on other animals, either as parasites or as scavengers. A, a chicken body louse, Mcnacanthus stramincus (Nitz.), female, ventral(length a little more than 3 mm.), Mallophaga-Amblycera. B, the large chickenlouse, Goniocotes gigas Tasch., female, dorsal (length 2^4 mm.), Mallophaga-Ischnocera. C, the dog louse, Trichodcctcs canis Deg., female, ventral (length1^4 mm.), Mallophaga-Ischnocera. D, a beetle, Platypsyllus castoris Rits.,that lives on beavers (length a little
. Smithsonian miscellaneous collections. Fig. 9.—Examples of insects having the biting-and-chewing type of mouthparts that live on other animals, either as parasites or as scavengers. A, a chicken body louse, Mcnacanthus stramincus (Nitz.), female, ventral(length a little more than 3 mm.), Mallophaga-Amblycera. B, the large chickenlouse, Goniocotes gigas Tasch., female, dorsal (length 2^4 mm.), Mallophaga-Ischnocera. C, the dog louse, Trichodcctcs canis Deg., female, ventral (length1^4 mm.), Mallophaga-Ischnocera. D, a beetle, Platypsyllus castoris Rits.,that lives on beavers (length a little over 2 mm.). E, an insect related toearwigs, Arixenia csan Jordan, found on a bat (length 18 mm.) (from Jordan,1909). F, another relative of the earwigs, Hemimerus dcccptus Rehn, varietyovatus Deoras, that lives on African rats (length 12 mm.) (from Deoras, 1941). suborders, the Amblycera and the Ischnocera. In the first group theshort antennae are ordinarily concealed in grooves on the undersurface of the head (figs. 9 A, 11 A), in t
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