. The descent of man, and selection in relation to sex. Evolution (Biology); Sexual selection in animals; Sexual dimorphism (Animals); Sex differences; Human beings. Chap. X.] COLEOPTERA. 361 but no use can at present be assigned to them. It is a highly-remarkable fact, that although the males do not ex- hibit even a trace of horns on the upper surface of the body, yet in the females a rudiment of a single horn on the head (fig. 21, a), and of a crest [b) on the thorax, are plainly visible. That the slightest thoracic crest in the female. Please note that these images are extracted from scanne
. The descent of man, and selection in relation to sex. Evolution (Biology); Sexual selection in animals; Sexual dimorphism (Animals); Sex differences; Human beings. Chap. X.] COLEOPTERA. 361 but no use can at present be assigned to them. It is a highly-remarkable fact, that although the males do not ex- hibit even a trace of horns on the upper surface of the body, yet in the females a rudiment of a single horn on the head (fig. 21, a), and of a crest [b) on the thorax, are plainly visible. That the slightest thoracic crest in the female. 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, booksubj, booksubjecthumanbeings
