Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomolo00smit Year: 1906 THE INSECT WORLD. 105 'nits,' to the liair ; one, Pedicidus vestinioiti, found on the body, known as the 'body-louse,' or to soldiers as 'gray- backs,' lives in and lays its eggs in the seams ol clothing, where they are protected ; the last, Phthirius inguinalis, 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 t
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Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomolo00smit Year: 1906 THE INSECT WORLD. 105 'nits, ' to the liair ; one, Pedicidus vestinioiti, found on the body, known as the 'body-louse, ' or to soldiers as 'gray- backs, ' lives in and lays its eggs in the seams ol clothing, where they are protected ; the last, Phthirius inguinalis, 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 F'*^'- 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 ciabiouse, Hithnws iniinmaUs. an opportunity to dust themselves. Dogs, donkeys, less frequently horses, and other animals, may b