. The descent of man, and selection in relation to sex. Evolution; Natural selection; Sexual selection in animals; Human beings -- Origin; Sexual dimorphism (Animals). 342 SEXUAL SELECTION. [Part II. it can be heard during the night at the distance of a mile â¢25 and that made by certain species is not unmusical 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 noticed26 that the male migratory locust of Russia (one of the Acridiidae), while coupled with the
. The descent of man, and selection in relation to sex. Evolution; Natural selection; Sexual selection in animals; Human beings -- Origin; Sexual dimorphism (Animals). 342 SEXUAL SELECTION. [Part II. it can be heard during the night at the distance of a mile â¢25 and that made by certain species is not unmusical 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 noticed26 that the male migratory locust of Russia (one of the Acridiidae), 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 In North America the Katy-did (Flatyphyllum concavum, one of the Locustidae) is described28 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 ; Mr. Bates, in speaking of the European field-cricket (one of the Achetidae), says: "The male has been ob- â 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 antennae the mate he has 251* Guilding, ' Transact. Linn. Soc.' vol. xv. p. 154. 2,5 Koppen, as quoted in the 'Zoological Record,' for 1867, p. 460. 27 Gilbert White, 'Nat. Hist, of Selborne,' vol. ii. 1825, p. 262. 58 Harris, 'Insects of New England,' 1842, p. Pig. 10.âGryllus campestris (from Lan- dois). Eight-hand figure, under side of part of the wing-nervure, much magnified, showing the teeth, st. Left-hand figure, upper surface of wing- cover, with the projecting, smooth ner- vure, r, across which the teeth (st) are Please note that these images are
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