[89] Compare chap. xiii., on “The Perception of Relations,” in my “Introduction to Comparative Psychology.” [90] _Nineteenth Century_, May, 1897, pp. 793-807. [91] Sharp, “Insects,” part ii., p. 147. [92] _Nature_, vol. lxii., p. 253 (July 12, 1900). [93] The quotation is from “The Cambridge Natural History,” vol. vi., “Insects,” part ii., by David Sharp, F.R.S.; see pp. 145, 146. [94] Sharp, _op. cit._, p. 147. [95] G. A. J. Rothney, “Notes on Indian Ants,” _Trans. Ent. Soc._, 1889, p. 354. [96] Sharp, _op. cit._, p. 226. [97] Lord Avebury (Sir John Lubbock), quoted in Romanes’ “Animal Intelligence,” pp. 62, 63. [98] Lord Avebury (Sir John Lubbock), “Scientific Lectures,” pp. 78, 79. [99] _Nature_, vol. xlvii., p. 393 (Aug., 1893), where A. Möller’s investigations are described by J. C. Willis. [100] A. Bethe, “Dürfen wir den Ameisen und Bienen psychische Qualitäten Zuschreiben,” _Pflüger’s Archiv._, lxx., 1898. [101] See p. 37. [102] _Supra_, p. 138. [103] “Scientific Lectures,” pp. 80-82. [104] _Proceedings of the Zoological Society_, 1874, p. 184. [105] “Scientific Lectures,” 2nd edit., p. 140. [106] Weismann, “Essays,” vol. ii., p. 50. [107] Huxley, “Collected Essays,” vol. vii., p. 155. [108] “The Descent of Man,” vol. i. p. 853, 2nd Ed., 1888. The quotations from Darwin in this paragraph and that which follows are somewhat condensed by a few omissions. [109] Vol. xxviii., Sept. and Nov., 1890, pp. 337-354, 699-719. [110] _Nineteenth Century_, Feb., 1888, p. 165. “Collected Essays,” vol. ix., p. 204. [111] _Op. cit._, pp. 709, 710. [112] Page 711. [113] “Mutual Aid among Savages.” _Nineteenth Century_, vol. xxix. April, 1891, p. 538. [114] “Descent of Man,” vol. i., p. 96. [115] “Des Sociétés Animales: Étude de Psychologie Comparée” (Paris, 1877). [116] “Mutual Aid among Savages,” _Nineteenth Century_, April, 1891, pp. 539, 540. [117] Page 63. [118] _Op. cit._, p. 267; _cf. supra_, p. 138. [119] G. F. Stout, “Manual of Psychology,” p. 268. [120] _Ibid._, p. 318. [121] “Manual of Psychology,” p. 84. [122] “Habit and Instinct,” ch. ix., p. 186. [123] “Letters on the Æsthetic Education of Mankind,” xxvii. [124] “Principles of Psychology,” § 533. [125] “On the Origin of Music,” pp. 231, 232. [126] “The Play of Animals,” Eng. trans., p. 12. [127] _Op. cit._, p. 7. [128] _Op. cit._, p. 19. [129] _Op. cit._, pp. 75, 76. [130] “Manual of Psychology,” p. 327. [131] _Op. cit._, pref., p. xx. [132] _Op. cit._, p. 290. [133] “Manual of Psychology,” p. 266. [134] _Op. cit._, p. 314. [135] “Descent of Man,” vol. ii., p. 60, 2nd edit. 1888. [136] “The Play of Animals,” Eng. trans., p. 229. [137] Quoted by Groos, _op. cit._, p. 259. [138] “Descent of Man,” vol. ii., p. 77. [139] Darwin, _op. cit._, p. 99. [140] Quoted by Darwin, “Descent of Man,” vol. ii., p. 58. [141] “Descent of Man,” vol. ii., p. 56. [142] “Habit and Instinct,” p. 217. [143] “Descent of Man,” vol. ii., p. 251.