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 . reseml)ling that of the Lepidoptera. The wings(Fig. 144, fore-wing) are larger in proportion to the restof the body than usual; they are more net-veined, the cellsbeing more numerous and extending to the outer margin.* - * In treating of this family wc avail ourselves larjreh- of the important work onthe American species, pul)li»hinjr at tlie time of writing, by Mr. E. Norton, in theTransactions of the American Entoniologii-al SoL-iety, vols. 1, •
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 . reseml)ling that of the Lepidoptera. The wings(Fig. 144, fore-wing) are larger in proportion to the restof the body than usual; they are more net-veined, the cellsbeing more numerous and extending to the outer margin.* - * In treating of this family wc avail ourselves larjreh- of the important work onthe American species, pul)li»hinjr at tlie time of writing, by Mr. E. Norton, in theTransactions of the American Entoniologii-al SoL-iety, vols. 1, •!. We therefore. 214 HYMENOPTERA. All these characters show that the saw-fly isi, a degrade^Hymenopter. The antennffi are not elbowed; are rather short and simple,clavate, but in rare instances fissured or feathered. The ab-domen consists, usuall}^, of eight external segments, the twolast being aborted on the under side, owing to the great develop-ment of the ovipositor. The ovipositor or saw (compareFig. 24) consists of two lamell®, the lower edge of which istoothed and fits in a groove in the under side of the upper one,which is toothed above, both protected by the usual sheath-likestylets. On pressing, says Lacaze-Duthiers, the end of theabdomen, we see the saw depressed, leave the direction ofthe axis of the body, and become perpendicular. Hy thismovement the saw, which both cuts and pierces, makes a gashin the soft part of the leaf where it deposits its eggs. The eggs are laid more commonly near the ribs of the leaf,in a series of slits, each slit containing but a single egg,Some species, on the
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
