. 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. Piff. 10. Taphro- deres distortus (enlarged). Up- per figure, male; lower figure, female. * We Lave liere a curious and inexplicable CAf^<^ of dimorphism, for some of the females of four European species of Dysticus, and of certain species of Hydroporus, have their elytra smooth; and no «intermediate gradations between the sulcated or punctured, and the quite smooth elytra have been observed. See Dr. H. Schau
. 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. Piff. 10. Taphro- deres distortus (enlarged). Up- per figure, male; lower figure, female. * We Lave liere a curious and inexplicable CAf^<^ of dimorphism, for some of the females of four European species of Dysticus, and of certain species of Hydroporus, have their elytra smooth; and no «intermediate gradations between the sulcated or punctured, and the quite smooth elytra have been observed. See Dr. H. Schaum, aa quoted in the *' Zoologist," vols, v-vi, 1847-48, p. 1896. Also Kirby and Spence, ** Introduction to Entomology," vol. iii, 1826, p. 305. f Westwood, ** Modern Class.," vol. ii, p. 193. The following statement about Penthe, and others in inverted commas, are taken Crom Mr. Walsh, ** Practical Entomologist," Phila., vol. iii, p. 88* \ Kirby and Spence, *' Introduct.," etc., vol. iii, pp. 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
Size: 1106px × 2261px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjecthumanbeings, bookyear
