. The descent of man and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. 344 SEXUAL SELECTION. [Pakt 11. wing which serves as the fiddle itself. One of the ner- vures (a) on the under surface of the former is finely ser- rated, and is scraped across the prominent nervures on the upper surface of the opposite or right wing. In our Bril- ish I'hasgonura virldUsima it appeared to me that the serrated nervure is rubbed agamst the rounded^ hind corner of the opposite wing, the edge of which is thick- ened, colored brown, and very sharp. In the rio-ht wino- but no
. The descent of man and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. 344 SEXUAL SELECTION. [Pakt 11. wing which serves as the fiddle itself. One of the ner- vures (a) on the under surface of the former is finely ser- rated, and is scraped across the prominent nervures on the upper surface of the opposite or right wing. In our Bril- ish I'hasgonura virldUsima it appeared to me that the serrated nervure is rubbed agamst the rounded^ hind corner of the opposite wing, the edge of which is thick- ened, colored brown, and very sharp. In the rio-ht wino- but not in the left, there is a little plate, as transparent as talc, surrounded by nervures, and called the speculum, In Ephippicjer vitium, a member of this same family, we have a curious subordinate modification; for the wing- covers are greatly reduced in size, but " the posterior part of the pro-thorax is elevated into a kind of dome over the. Fio. 'lilorocffilQ8 Tanana (from Bates), a. b. Lobes of oppodte Tvlnj^ Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darwin, Charles, 1809-1882. New York, D. Appleton and company
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