[33] See A. G. Mayer “On the Mating Instinct of Moths.” Ann. and Mag. of Nat. Hist., ser. 7, vol. v., Feb., 1900, p. 183.
[34] Some of the observations on which the summary of results given in this section are founded are presented in some detail in “Habit and Instinct,” pp. 29–100.
[35] Psychological Review, May, 1899, p. 286.
[36] “Birds from Moidart and Elsewhere,” p. 107. Edinburgh: Douglas.
[37] Transactions of Northumberland and Durham Natural History Society, vol. viii., p. 213.
[38] “Mental Evolution in Animals,” p. 159.
[39] “Lectures on Human and Animal Psychology,” p. 401.
[40] “Instinct and Acquisition,” Nature, vol. xii., p. 507.
[41] On the nature of impulse, see infra, p. [235].
[42] “Lectures on Human and Animal Psychology,” p. 405.