. 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. 338 THE DESCENT OF MAN. comes next to Onitis) has a similar slight crest on the thorax, and the male bears a great projection in the same situation. So again, there can hardly be a doubt that the little point (a) on the head of the female Onitis furcifer^ as well as on the head of the females of two or three allied species, is a rudimentary representative of the cephalic horn, which is common to the males of so
. 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. 338 THE DESCENT OF MAN. comes next to Onitis) has a similar slight crest on the thorax, and the male bears a great projection in the same situation. So again, there can hardly be a doubt that the little point (a) on the head of the female Onitis furcifer^ as well as on the head of the females of two or three allied species, is a rudimentary representative of the cephalic horn, which is common to the males of so many Lamelli- corn beetles, as in Phanaeus (fig. 18). The odd belief that rudiments have been created to com- plete the scheme of nature is here so far from holding good, that we have a complete inversion of the ordinary state of things in the family. We may reasonably suspect that the males orignreally bore horns and transferred them to the females in a rudimentary condition, as in so many other Lamellicorns. Why the males subsequently lost their horns, we know not; but this may have been caused through. 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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