. The descent of man : and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. Difference in Size between the Sexes. —With insects of all kinds the males are commonly smaller than the females; and this difference can often be detected even in the larval state. So considerable is the difference between the male and female cocoons of the silk-moth (Bom- byx mori), that in France they are separated by a particular mode of weighing.^^ In the lower classes of the animal kingdom, the greater size of the females seems generally Fig-. 10. Taphro- deres distortus (much e
. The descent of man : and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. Difference in Size between the Sexes. —With insects of all kinds the males are commonly smaller than the females; and this difference can often be detected even in the larval state. So considerable is the difference between the male and female cocoons of the silk-moth (Bom- byx mori), that in France they are separated by a particular mode of weighing.^^ In the lower classes of the animal kingdom, the greater size of the females seems generally Fig-. 10. Taphro- deres distortus (much enlarg- ed). Upper fig-- u r e, male; lower figure, female. "H. W. Bates, in 'Journal of Proc. Linn. Soc' vol. vi. 1862, p. 74. Mr. Wonfor's observations are quoted in 'Popular Science Review,' 1868, p. 343. 12 'The Naturalist in Nicaragua,' 1874, pp. 316-320. On the phosphor- escence of the eggs, see 'Annals and Mag. of Nat. Hist.' 1871, Nov., p. 372. isRobinet, 'Vers a Sole,' 1848, 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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