. The descent of man : and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. Fig. 23. Bledius taurus, magnified. Left-hand figure, male; right- hand figure, female. Staphylinidae, Professor Westwood states that, "male specimens "can be found in the same locality in which the central horn of "the thorax is very large, but the horns of the head quite rudi- "mental; and others, in which the thoracic horn is much shorter, "whilst the protuberances on the head are ;" Here we ap- parently have a case of compensation, which thr
. The descent of man : and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. Fig. 23. Bledius taurus, magnified. Left-hand figure, male; right- hand figure, female. Staphylinidae, Professor Westwood states that, "male specimens "can be found in the same locality in which the central horn of "the thorax is very large, but the horns of the head quite rudi- "mental; and others, in which the thoracic horn is much shorter, "whilst the protuberances on the head are ;" Here we ap- parently have a case of compensation, which throws light on that just given of the supposed loss of the upper horns by the males of Onitis. Law of ^Some male beetles, which seem ill-fitted for fighting, nevertheless engage in conflicts for the possession of the females. Mr. Wallace®* saw two males of Leptorhynchus angusta- ««Kirby and Spence, 'Introduct. Entomolog.' vol. iii. p. 329. ^7 'Modern Classification of Insects,' vol. i. p. 172: Siagonium, p. 172. In the British Museum I noticed one male specimen of Siagonium in an intermediate condition, so that the dimorphism is not strict. «8 'The Malay Archipelago,' vol. ii. 1869, p. 276. Riley, Sixth 'Re- port on insects of Missouri,' 1874, p. 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 : Merrill and Baker
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