. A practical treatise on diseases of the skin, for the use of students and practitioners. der the genital region is chiefly involved, though inexceptional cases all the hairy portions of the skin may be invaded, including the eyebrows, the eyelashes,the axillae, and the moustache and beard,the hairy chest, and the hairy legs of themale. The body of the pubic louse () is smaller than either of those de-scribed above. Its head is also attachedmore closely to its thorax, having a shapewhich is compared with that of a thorax is not distinctly separatedfrom the abdomen, and of th
. A practical treatise on diseases of the skin, for the use of students and practitioners. der the genital region is chiefly involved, though inexceptional cases all the hairy portions of the skin may be invaded, including the eyebrows, the eyelashes,the axillae, and the moustache and beard,the hairy chest, and the hairy legs of themale. The body of the pubic louse () is smaller than either of those de-scribed above. Its head is also attachedmore closely to its thorax, having a shapewhich is compared with that of a thorax is not distinctly separatedfrom the abdomen, and of the six stoutlegs with which the louse is provided,the second and third pair are conspicu-ously powerful, and armed with relativelylarge hooks at the tarsal extremity. Theresemblance of the latter to the claws ofa crab has given to this creature the com-mon name of crab-louse. The lateralabdominal indentations are much less distinct than in the other varieties;and the blackish marginal marks of the body-and head-lice are herescarcely apparent. The abdomen is also much elongated, having a. Pediculus pubis (after Schmarda PARASITIC AFFECTIONS. 783 more rounded contour. The pubic louse is provided on its lateralborders with eight short conical feet, terminating in bristles. It is-also distinguished from the others of its family by the length of itsanal bristles, and by the peculiar shield-shaped carapace which coversnearly one-half of the dorsum. The male is from to 1 mm. long,and from to mm. in width, being thus from 1 to than the female. The pubic louse is much more inactive than the others, and doesnot ordinarily escape its pursuer. It buries its head deeply in a fol-licular orifice, and steadies itself in this position, where it may remainfor some time, by grasping the adjacent hairs with its short and pow-erful claws. A moderate degree of force is required for its dislodge-ment from this favorite position, and when removed its grasp of thehair to whic
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Keywords: ., bookauthorhydejamesnevins184019, bookcentury1800, bookdecade1890
