Archive image from page 359 of The descent of man, and. The descent of man, and selection in relation to sex descentofmansel01darw Year: 1871 342 SEXUAL SELECTION. [Part IL it can be heard during the niglit at the distance of a mile;' and that made by certain species is not mimusical even to the human ear, so that the Indians on the Ama- zons keep them in wicker cages. All observers agree that the sounds serve either to call or excite the mute females. But it has been noticed ' that the male migratory locust of Russia (one of the Acridiidaj), while coupled with the female, stridulates from an
Archive image from page 359 of The descent of man, and. The descent of man, and selection in relation to sex descentofmansel01darw Year: 1871 342 SEXUAL SELECTION. [Part IL it can be heard during the niglit at the distance of a mile;' and that made by certain species is not mimusical even to the human ear, so that the Indians on the Ama- zons keep them in wicker cages. All observers agree that the sounds serve either to call or excite the mute females. But it has been noticed ' that the male migratory locust of Russia (one of the Acridiidaj), while coupled with the female, stridulates from anger or jealousy when ap- proached by another male. The house-cricket when sur- prised at night uses its voice to warn its fellows.' In North America the Katy-did {Platyphyllum concavum one of the Locustidse) is described ' as mounting on the upper branches of a tree, and in the evening be- ginning his noisy babble, while rival notes issue from the neighboring trees, and the groves resound with the call of Katy - did - she - did the live-long night.' Mr. Bates, in speaking of the European field-cricket (one of the Achetidai), says: 'The male has been ob- served to place itself in the evening at the entrance of its burrow, and stridulate until a female approaches, when the louder. notes are succeeded by a more subdued tone, while the success- ful musician caresses with his antennne the mate he has -' L. Guilding, ' Transact. Linn. Soc' vol. xv. p. 154. Kiippen, as quoted in the 'Zooloffical Record,' for 1867, p. 460. ' Gilbert White, 'Nat. Hist, of Selbornc,' vol. ii. 1825, p. 262. ' Harris, 'Insects of New England,' 1842, p. 128. Fig. 10.—Qryllus campestris (from Lan- dois). Risht-hand floiire. under side of part of the wing-nervuro, much maguifled, showinn; the Iceth, st. Left-hand fitrure, upper surface of wing- cover, with the projecting, smooth ner- vure, r, across which the teeth {st) are scraped.
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