Economic entomology for the economicentomolo00smit_0 Year: 1896 l^HE INSECT WORLD. *'nits,' to the hair; one, Pediculus vestime7iti, found on the body, known as the '' body-louse,' or to soldiers as '' gray- backs, '' lives in and lays its eggs in the seams of clothing, where they are protected ; the last, Phthirius ingzcinalis, known as the 'crab-louse,' infests the pubic region and armpits. The latter fastens its eggs to the hair among which it lives, and this is per- haps the general rule throughout the series. Domestic animals of all kinds are infested by lice ; but it is not ne
Economic entomology for the economicentomolo00smit_0 Year: 1896 l^HE INSECT WORLD. *'nits,' to the hair; one, Pediculus vestime7iti, found on the body, known as the '' body-louse,' or to soldiers as '' gray- backs, '' lives in and lays its eggs in the seams of clothing, where they are protected ; the last, Phthirius ingzcinalis, known as the 'crab-louse,' infests the pubic region and armpits. The latter fastens its eggs to the hair among which it lives, and this is per- haps the general rule throughout the series. Domestic animals of all kinds are infested by lice ; but it is not necessary to study the species in detail, since their habits are much the same, and the method of treatment is identical. For the head-louse on man nothing is better than a thorough appli- cation of lard, vaseline, or other greasy material. It should be applied at least twice at intervals of a few days, because the treat- ment does not kill eggs, and eggs unhatched at the first treat- ment would not be affected. As against the body-louse, the application of mercurial oint- ment in the seams of the clothing answers every purpose. This has proved effective in camps and hospitals, where the insects sometimes increase with marvellous rapidity. As against the 'crab-louse,' the mercurial ointment may be applied directly to the infested spots, and here also several ap- plications are necessary to reach the insects as they hatch from the Fig, 76, eggs. Their vitality is great, and that of the eggs is yet greater. Clothing, no matter how carefully washed, may still remain infested with eggs, protected as they are in the seams, unless actual boiling is continued for a considerable period of time. Where lice infest animals the latter can sometimes be cleared by simply giving them crab-iouse, Phtiurius ingumaiis. an opportunity to dust themselves. Dogs, donkeys, less frequently horses, and other animals, may be often seen in dusty roads, rolling about in evident enjoyment, and one result of
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