Elementary studies in insect life Elementary studies in insect life elementarystudie00hunt Year: 1902 196 ELEMENTAEY STUDIES IN INSECT LIFE FIG. 171. bids) and A fly (Sarcophaga cim- its pupa-case, showing DIPTERA. Insects with haustellate mouth-parts, front wings membranous, hind wings replaced by knobbed processes called halteres. The- metamorphosis is complete. The name is derived from 5 dis, double, and Trrepdv, pteron, wing. The Diptera include all insects which can properly be called flies. Such forms as the house-fly, the mosquito, and the horse- fly are Diptera. While the mouth is
Elementary studies in insect life Elementary studies in insect life elementarystudie00hunt Year: 1902 196 ELEMENTAEY STUDIES IN INSECT LIFE FIG. 171. bids) and A fly (Sarcophaga cim- its pupa-case, showing DIPTERA. Insects with haustellate mouth-parts, front wings membranous, hind wings replaced by knobbed processes called halteres. The- metamorphosis is complete. The name is derived from 5 dis, double, and Trrepdv, pteron, wing. The Diptera include all insects which can properly be called flies. Such forms as the house-fly, the mosquito, and the horse- fly are Diptera. While the mouth is fitted for sucking, in some flies such as mos- quitoes that organ is fitted for piercing the skin and sucking the blood. The or- der is a large one, and the species differ much in man- ner of life. The larvae are commonly called maggots. The females generally lay their eggs in the vicinity of the proper food for the maggot. Our common house- fly prefers fresh horse-manure for oviposition. Upon this the maggot feeds about a week, then transforms into the pupal stage, remains so for about another week, and then comes forth as a two-winged insect to find its way inside mosquito-barred doors and windows, or into dwelling-houses not properly guarded. The method of emergence from the pupal case is -of interest. The larvae of more generalized forms such as the robber-fly, come forth from a straight seam in the side of the case, and in this differ not at all from the mode of many other insects. In the case of the more bursting off of end of pupa-case to be its method of emerging. Enlarged.
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