Archive image from page 304 of The descent of man, and. The descent of man, and selection in relation to sex descentofmanse00darw Year: 1870 CHAT. X.] ORTHOPTERA. 303 of the nervures {a) on the under surface of the former is finely- serrated, and is scraped across the prominent nervures on the upper surface of the opposite or right wing. In our British Phasgonura viridissima it appeared to me that the serrated nervure is rubbed against the rounded hind-corner of the oppo- site wing, the edge of which is thickened, colored brown, and very sharp. In the right wing, but not in the left, there is
Archive image from page 304 of The descent of man, and. The descent of man, and selection in relation to sex descentofmanse00darw Year: 1870 CHAT. X.] ORTHOPTERA. 303 of the nervures {a) on the under surface of the former is finely- serrated, and is scraped across the prominent nervures on the upper surface of the opposite or right wing. In our British Phasgonura viridissima it appeared to me that the serrated nervure is rubbed against the rounded hind-corner of the oppo- site wing, the edge of which is thickened, colored brown, and very sharp. In the right wing, but not in the left, there is a little plate, as transparent as talc, surrounded by nervures, and Fia. 13.âChlorocoelus Xanana (from Bates). a,b. Lobesof opposite wing-overs. called the speculum. In Ephippiger viftum, a member of thit. game family, we have a curious subordinate modification ; for the wing-covers are greatly reduced in size, but 'â the posterior part of the pro-thorax is elevated into a kind of dome over the wing-covers, and which has probably the effect of increasing the sound.' We thus see that the musical apparatus is more differentiated 9r specialized in the Locustidae (which include I believe, the »' Westwood. 'Modern Class, of Insects' vol. I . sa,
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