Archive image from page 298 of The descent of man . The descent of man : and selection in relation to sex descentofmanseledarw Year: 1874 ORTHOPTERA. 285 characters of many other animals. They must have been inde- pendently developed in the two sexes, which no doubt mutually call to each other during the season of love. In most other Lo- custidse (but not according to Landois in Decticus) the females Fig. 15. Pneumora (from specimens in the British Museum). Upper figure, male; lower figxire, female. have rudiments of the stridulatory organs proper to the male; from whom it is probable that
Archive image from page 298 of The descent of man . The descent of man : and selection in relation to sex descentofmanseledarw Year: 1874 ORTHOPTERA. 285 characters of many other animals. They must have been inde- pendently developed in the two sexes, which no doubt mutually call to each other during the season of love. In most other Lo- custidse (but not according to Landois in Decticus) the females Fig. 15. Pneumora (from specimens in the British Museum). Upper figure, male; lower figxire, female. have rudiments of the stridulatory organs proper to the male; from whom it is probable that these have been transferred. Lan- dois also found such rudiments on the under surface of the wing- covers of the female Achetidse, and on the femora of the female Acridiidse. In the Homoptera, also, the females have the proper musical apparatus in a functionless state; and we shall hereafter meet in other divisions of the animal kingdom with many in- stances of structures proper to the male being present in a rudi- mentary condition in the female.
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