. The descent of man, and selection in relation to sex. Evolution; Heredity; Human beings; Natural selection. CHAP. X.] COLEOPTERA. 313 collection, arc 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
. The descent of man, and selection in relation to sex. Evolution; Heredity; Human beings; Natural selection. CHAP. X.] COLEOPTERA. 313 collection, arc 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. Fig. !<.<—Chalcosoma atlas. Upper figure, male (reduced); lower figure, female (tmt. size). more richly than the males, and this does not accord with the commop rule in regard to 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 clypeus of the 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 quadru- peds, such as stags, rhinoceroses, etc., and are wonderful both from their size and diversified shapes. Instead of describing ways, as it is believed, of a dark blue color, is black, the female (the so-called O. rufif with a red thorax. The male, aiso, of Or- coUis) having a rufous thorax. sqdacna atra, as I he» fi-om Mr. Walsh, (N)—Vol. 3. 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 Hurst
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