Guide to the study of insects and a treatise on those injurious and beneficial to crops, for the use of colleges, farm-schools, and agriculturists . shut the muscular leaves. The inside of this broadfleshy expansion is rough like a rasp, and as Newport states,is easily employed by tlie insect in scrajDing or tearingdelicate surfaces. It is by means of this curious structurethat the busy house-fly occasions much mischief to the covers by thealbuminous polish,and leaving trac-ings of its depre-dations in the soil-ed and spotted ap-pearance which itoccasions on house-flybreeds in Augusta
Guide to the study of insects and a treatise on those injurious and beneficial to crops, for the use of colleges, farm-schools, and agriculturists . shut the muscular leaves. The inside of this broadfleshy expansion is rough like a rasp, and as Newport states,is easily employed by tlie insect in scrajDing or tearingdelicate surfaces. It is by means of this curious structurethat the busy house-fly occasions much mischief to the covers by thealbuminous polish,and leaving trac-ings of its depre-dations in the soil-ed and spotted ap-pearance which itoccasions on house-flybreeds in Augustabout stables. TheFjc. 331. eggs are deposited in horse-dung. The larva (Fig. 331*) hatches twenty-fourhours after the eggs are laid ; it moults twice, and in abouta week pupates, and in six or seven days more the flyappears. In Europe it is infested by minute Chalcids. Idia JSigoti, according to Coquerel and Mondiere, producesa disease in the natives of Senegal, probably by ovipositingon the skin, thus giving rise to hard red fluctuating tumors,in which the larva of this fly resides. The species of the genus Anthomyia, seen about flowers, in. * Fig. 331, A, larva of Musca domestica, just hatched, showing the distribu-tion of the two main tracheae, and the anterior and posterior commissures(a, a), dorsal view. B, the larva in the second stage; sp, spiracle. C, spiracleenlarged. F, head of the same larva, enlarged ; bl, labrum (?); md, mandibles;mx, maxillffi; at, antennae. E, a terminal spiracle much enlarged. D, pupa-rium; sp, prothoracic spiracle. All tlic figures much enlarged. Muscro^. 411 the larva state live in decaying vegetable matter and in are smaller flies than the foregoing genera, with smalleralulae, and the fourth longitudinal vein of the wing is straight,thus leaving the first posterior cell fully open. The larvae aregenerall}^ much like those of the meat-fly, but are thicker,wliile others, belonging to the genus Homalomyia^ are flat-tened and hairy.
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
