. Essentials of laboratory diagnosis; designed for students and practitioners. lly. It pre-vails in summer on grass and plants and attaches itself to theskin of man by its hooklets. Insecta. Hemiptera. Pediculus Capitis (Head Louse).—The male is from 1 to long; the female is to 2 millimeters long. The INSECTA. HEMIPTERA. Id color of the parasite varies somewhat with the race of its the Caucasian it is gray with a dark border; in the Negro andChinaman it is much darker in color. The eggs are milli-meter in length and are attached to the hairs, forming the so-calle
. Essentials of laboratory diagnosis; designed for students and practitioners. lly. It pre-vails in summer on grass and plants and attaches itself to theskin of man by its hooklets. Insecta. Hemiptera. Pediculus Capitis (Head Louse).—The male is from 1 to long; the female is to 2 millimeters long. The INSECTA. HEMIPTERA. Id color of the parasite varies somewhat with the race of its the Caucasian it is gray with a dark border; in the Negro andChinaman it is much darker in color. The eggs are milli-meter in length and are attached to the hairs, forming the so-called nits. These nits are whitish, oval masses which areeasily visible. This parasite, while usually found upon the hairof the head, may be found in other portions of the body. Pediculus Vestimenti (Body Louse).—This parasite is con-siderably larger than the former, being from 2 to 5 millimetersloDg and whitish gray in color, the back part of the body beingwider than the thorax. The antennae are longer than those ofthe head louse. The eggs are from to millimeter in. Fig. 31.—Pedicdlos Pubis. length, about 70 being laid by each female. This parasite isfound npon the clothing, in which it deposits its eggs, especiallyabout the neck, back, and abdomen. Pediculus Pubis (Phthirius Inguinalis, or Crab Louse).—This parasite is smaller than the head lonse (see Fig. 31),grayish yellow or gray white in color, the male being from 1 millimeter in length, the female about millimeters inlength. The eggs are pear-shaped, from to millimeterin length and from to millimeter in breadth. This parasite infects the parts of the body covered by theshorter hairs, such as the pubis, axilla, eyebrows, and chest. Cimex Lectularius (Acanthia Lectularia, or Bedbug).—While, strictly speaking, the bedbug is not a parasite of man, yetas its habitat is the bed, bedding, and walls of the sleepingapartments of man, it may be considered as indirectly usually
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