. Elementary entomology . Fig. io8. Female of GiyHiis asshnilis, with inner and outer views of auditory membranes on front tibi^, at c and d (After Marlatt, United States Department of Agriculture) The males have the best-developed musical apparatus of all the orthopteran orchestra. The principal vein, which extends along the base of the wing-cover, is ridged like a file, and on the inner margin of the wing-cover, a short distance from the base, the edge is hard- ened so that it may be used as a scraper, or rasp. Elevating his wings to an angle of forty-five degrees, and arranging them so that
. Elementary entomology . Fig. io8. Female of GiyHiis asshnilis, with inner and outer views of auditory membranes on front tibi^, at c and d (After Marlatt, United States Department of Agriculture) The males have the best-developed musical apparatus of all the orthopteran orchestra. The principal vein, which extends along the base of the wing-cover, is ridged like a file, and on the inner margin of the wing-cover, a short distance from the base, the edge is hard- ened so that it may be used as a scraper, or rasp. Elevating his wings to an angle of forty-five degrees, and arranging them so that the scraper of one rests on the file of the other, he moves them to set the neighboring wing mem- branes into vibration, thus pro- ducing the shrill call or the faint chirp, according to his mood. The tree crickets are quite different from the common black sorts and are arboreal, as their name indicates. They are of a creamy-white or light yel- lowish color, often slightly tinged with green, and the wings are transparent. The antennas are much longer than the body.
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
