[38] Trans. Linn. Soc. vol. 24, 1866.

[39] These darker ribs are also present in the male and M female but are obscured owing to the generally deeper colour.

[40] See Appendix II, p. [158].

[41] Spolia Zeylanica, 1910.

[42] We shall take it for the present that, from the point of view of mimicry, birds are the main enemies of butterflies (cf. Chap. IX).

[43] See later, p. [119].

[44] The specimens figured on [Pl. V] were dried in papers when taken. The body is consequently much compressed and the characteristic scarlet of P. hector and P. aristolochiae is largely hidden.

[45] Philosophical Transactions of the Royal Society, vol. 204, 1913.

[46] Tijdschr. voor Entomologie, vol. 53, 1909. A more accessible account is given by de Meijere, Zeit. f. indukt. Abstamm. u. Vererbungslehre, vol. 3, 1910.

[47] For further information see Poulton, Trans. Ent. Soc. Lond. 1909, and various notes in Proc. Ent. Soc. Lond. subsequent to this date.