. The descent of man, and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings; Sexual selection in animals; Sexual dimorphism (Animals); Sex differences. 334 THE DESCENT OF MAN. in Mr Bates' collection^ are generally redder but rather duller than the females^ the latter being colored of a more or less splendid golden-green. On the other hand, in one species the male is golden-green, the female being richly tinted with red and purple. In the genus Esmeralda the sexes differ so greatly in color that they have been ranked as distinct species; in one species both are
. The descent of man, and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings; Sexual selection in animals; Sexual dimorphism (Animals); Sex differences. 334 THE DESCENT OF MAN. in Mr Bates' collection^ are generally redder but rather duller than the females^ the latter being colored of a more or less splendid golden-green. On the other hand, in one species the male is golden-green, the female being richly tinted with red and purple. In the genus Esmeralda the sexes differ so greatly in color that they have been ranked as distinct species; in one species both are of a beautiful shining green, but the male has a red thorax. On the whole, as far as I could judge, the females of those Prionidae, in which the sexes differ^ are colored more richly than the males, and this does not accord with the common rule in regard io color when acquired through sexual selection. A most remarkable distinction between the sexes of many beetles is presented by the great horns which rise from the head, thorax and of ^Jie males; and in some few cases from the under surface of the body. These horns in the great family of the Lamellicorns, resemble those of various quadrupeds, such as stags^ rhinoceroses^ etCo, and are wonderiu. both from sheir size and diversified shapes. Instead of inscribing thsm, I have given figures of the males and females of some of the more remarkable forms. (Figs. 16 to 20.) The females generally exhibit rudiments. Fig. 16. Chalcosoma atias. Upper figure, male (reduced); lower fi^re, femai^ (natural size),. 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 : A. L. Burt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjecthumanbeings, bookyear
