[28] See Shelford, Proc. Zool. Soc. 1902, p. 260. A coloured figure of both species is given in the paper.
[29] Macrolepidoptera of the World. Fauna Americana, pp. 98-104, Plates 28-30.
[30] "In what way our Leptalis (= Dismorphia) originally acquired the general form and colour of Ithomiae I must leave undiscovered." Trans. Linn. Soc. vol. 23, 1862, p. 513.
[31] Darwinism, 1890, pp. 242-244.
[32] Origin of Species, 6th Edition, 1891, p. 354.
[33] H. misippus was at one time regarded as a clear case of Batesian mimicry. But in view of its plentifulness, of the fact that it may be abundant outside the area inhabited by its model, and of the ease with which it can establish itself in parts remote from its original habitat, e.g. S. America, it has come to be regarded by certain supporters of the mimicry theory as a Müllerian mimic. Cf. Poulton, Essays on Evolution, 1908, pp. 215-217.
[34] An English translation of Müller's paper is given by Meldola, Proc. Ent. Soc., 1879, p. xx.
[35] Trans. Ent. Soc. Lond., 1908, p. 93.
[36] Provided of course that the type form remains in the majority. If the variation occurred simultaneously in more than 50% of A the advantage would naturally be with the variation.
[37] It is possible to imagine an exceptional case though most unlikely that it would occur. Suppose for example that there were a number of distasteful species, say 20, all of different patterns, and suppose that in all of them a particular variation occurred simultaneously; then if the total shewing that variation from among the 20 species were greater than the number of any one of the species, all of the 20 species would come to take on the form of the new variation. In this way it is imaginable that the new pattern would gradually engulf all the old ones.