Directions for collecting and preserving insects . oxys, or the injury to ourcrops of the Hessian-fly, Wheat-midge, Cab-bage-maggot, Onion-maggot, etc. There are,in fact, but tAvo families, Syrphida? and Tachi-nidfe, which can be looked upon as beneficialto the cultivator, though many act the partof scavengers. ISTo insects, not even theLepidoptera, furnish such a variety of curi-ous larval characters, and none, perhaps,offer a wider or more interesting field of in-vestigation to the biologist. It is difficultto give any very satisfactory arrangementof these Two-winged flies, thong!) they easi
Directions for collecting and preserving insects . oxys, or the injury to ourcrops of the Hessian-fly, Wheat-midge, Cab-bage-maggot, Onion-maggot, etc. There are,in fact, but tAvo families, Syrphida? and Tachi-nidfe, which can be looked upon as beneficialto the cultivator, though many act the partof scavengers. ISTo insects, not even theLepidoptera, furnish such a variety of curi-ous larval characters, and none, perhaps,offer a wider or more interesting field of in-vestigation to the biologist. It is difficultto give any very satisfactory arrangementof these Two-winged flies, thong!) they easilyfall into two rather artificial sections. These are: 1st,^NEMOCERA, orthose with long antennae, havingmore than six joints, and palpi hav-ing four or five joints The pupa isnaked, as in the Lepidoptera, withthe limbs exposed. This kind ofpupa is called obtected. 2d, BRACHO-CERA, or those with short antenna-,not having more than three distinctjoints, and palpi with one or twojoints. The pupa is mostly coarctate, i. r., is formed within, and more. FIG. 24.—A Hawk-fly (Erax las-tardi). a perfect insect; b, pupa ;larva shown at side.
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Keywords: ., bookauthorrileycha, bookcentury1800, bookdecade1890, bookyear1892
