. British insects : a familiar description of the form, structure, habits, and transformations of insects. Base of under side of wing-case of green Grasshopper {Ac7-idaviridissima) magnified. and bow) in the left wing of the green 20 shows the instrument in the right wing (A) ofanother species, Acrida brachelytra, in which one of thestrings crosses the sounding-board. J^ is the left wing,on which in this species is the file or bow. C is the fileor bow more highly magnified. In the common housecricket the sounding-board is divided by nervures intoseveral areas of various sizes
. British insects : a familiar description of the form, structure, habits, and transformations of insects. Base of under side of wing-case of green Grasshopper {Ac7-idaviridissima) magnified. and bow) in the left wing of the green 20 shows the instrument in the right wing (A) ofanother species, Acrida brachelytra, in which one of thestrings crosses the sounding-board. J^ is the left wing,on which in this species is the file or bow. C is the fileor bow more highly magnified. In the common housecricket the sounding-board is divided by nervures intoseveral areas of various sizes and shapes, and the soundis supposed to be influenced by this circumstance. WINGS OF INSECTS, AND THEIR CLASSIFICATION. 45 It has beeu found that the sound may be producedartificially in dead specimens by rubbing the wingstogether.* Fig. A. Upper surface of right wing-case of Acrida braclieljtra. B. Under surfacj of left wing-case of do. C. File more highly magnified. Forjigures of Order III., Orthoptera, see Plate IV.,fgs. 2, 3, 4, 5. From the insects whose encased and folded wingshave been described, we turn to the dragonfly, withfour large, strong, ever-expanded wings, which bearthe insect forward, backward, or from side to side withequal ease, and with a swiftness far beyond that of almostany pursuing enemy. These wings, with those of the smaller dragonflies, ofthe delicate golden-eyed lace-fly, and others, are chieflycharacterized by their numerous nerves^ which, inter-secting their whole surface, form a kind of fine networkof small squarish meshes. The insects with these wings,and some others in which the network is not so perfect,belong to the order Neuroptera {vtvpoc, nerve, impov,wing). The wings are always four in number, and * These figures, with some others used in this work, are taken fromTodd and Bowmans
Size: 1892px × 1321px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorme, bookcentury1800, bookdecade1870, booksubjectinsects
