. The descent of man, and selection in relation to sex. Evolution (Biology); Sexual selection in animals; Sexual dimorphism (Animals); Sex differences; Human beings -- Origin. 344 SEXUAL SELECTION. [Part II. 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 Brit- ish Phasgonura viridissima it appeared to me that the serrated, nervure is rubbed against the rounded hind corner of the opposite wing, the edge of which is th
. The descent of man, and selection in relation to sex. Evolution (Biology); Sexual selection in animals; Sexual dimorphism (Animals); Sex differences; Human beings -- Origin. 344 SEXUAL SELECTION. [Part II. 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 Brit- ish Phasgonura viridissima it appeared to me that the serrated, nervure is rubbed against the rounded hind corner of the opposite wing, the edge of which is thick- ened, 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 called the speculum, In Ephippiger 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. Fig. 12.—Chlorocoelus Tanana (from Bates), a. b. Lobes of opposite win^ 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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Keywords: ., bookcentury1800, bookdecade1870, booksubjectevoluti, bookyear1872
