Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . or ridgebearing vibratory flanges; d, resonant surface, with ridges. gated ganglionic globules (Siebolds Anatomy of the In-vertebrates). In the green grasshoppers, katydids, andtheir allies, the ears are situated on the fore legs (tibia?),where these organs can be found after a careful search (). Having ears to hear, locusts, grasshoppers, katydids, a,ndcrickets are also very musical. One may sometimes see thered-legged locust standing on the ground and rubbing oneleg against the folded wing, an
Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . or ridgebearing vibratory flanges; d, resonant surface, with ridges. gated ganglionic globules (Siebolds Anatomy of the In-vertebrates). In the green grasshoppers, katydids, andtheir allies, the ears are situated on the fore legs (tibia?),where these organs can be found after a careful search (). Having ears to hear, locusts, grasshoppers, katydids, a,ndcrickets are also very musical. One may sometimes see thered-legged locust standing on the ground and rubbing oneleg against the folded wing, and a shrill chirruping noisemay be heard. The noise ismade by a row of dull spineson the inside of the femur,forming a rude file whichrasps the wing. Certaingrasshoppers, as the katy-did and the crickets (, 25), have on the underside of the uppermost of the fore wings a sort of file which FIG. 25.—Enlarged view of the vibratory flanges seen at b, Fig. 24.—This and rubs over a resonant surface, Fig. 19 after N. B. Pierce. like a drums head. The file may be likened to the bow, and. THE SENSES OF INSECTS. 31 the drum-like space to the body of the violiu. Thus, mostgrasshoppers are fiddlers, and during the summer, both byday and night, the air resounds with the music of theseprimitive violinists. This noise may add to our pleasure, orbecome tedious and disagreeable. This makes little differ-ence, for insect-music is all-important. It is the cricketslove-call; and were crickets, etc., deaf and dumb, we aresafe in saying the breed would soon run out, because theywould not otherwise readily mate. Insects also have the sense of touch highly developed; itsseat is in the numerous hairs and bristles which clothe theantennae and palpi, as well as the legs and the body itself.* The hairs of insects form an interesting subject for micro-scopic study, since they vary so much in shape. The simplestare seen in the smaller caterpillars, and the larger nakedkinds, in which the hairs are
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