Archive image from page 358 of The descent of man and. The descent of man and selection in relation to sex descentofmansele001darw Year: 1909 CllAP. X.] ORTIIurTEUA. 347 wings, the female being wingless, it is remarku])le tliat the thighs are not rubbed in the usual manner against the wing-eovers; but this may perhaps be aeeounteJ for by the unusually small size of the hind-legs. I have not been able to examine the inner surface of the thighs, which, judging from analogy, would be linely serrated. Tlie species of Pneumora have been more profoundly modilied for the sake of slridulalion than an

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Archive image from page 358 of The descent of man and. The descent of man and selection in relation to sex descentofmansele001darw Year: 1909 CllAP. X.] ORTIIurTEUA. 347 wings, the female being wingless, it is remarku])le tliat the thighs are not rubbed in the usual manner against the wing-eovers; but this may perhaps be aeeounteJ for by the unusually small size of the hind-legs. I have not been able to examine the inner surface of the thighs, which, judging from analogy, would be linely serrated. Tlie species of Pneumora have been more profoundly modilied for the sake of slridulalion than any other orlhopterous insect; for in the male the wlole body has been couverled

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