[18] Coloured figures of these and of the other African species referred to may be found in Eltringham's work on African Mimetic Butterflies.
[19] These descriptions are taken from preserved specimens which I owe for the most part to the kindness of Dr Jordan. I have not had an opportunity of examining fresh ones.
[20] This is more marked in Castnia than in Anthomysa. It appears to be a peculiarity of many members of the genus Castnia that the scales do not lie so tight as generally in moths. Owing to this, some of the large whole-coloured species have a somewhat fluffy look.
[21] Cf. Poulton, Essays on Evolution, 1908, pp. 264-6.
[22] Cf. Poulton, Darwin and the 'Origin,' 1909, pp. 177-186.
[23] The N. American members of this genus are often referred to as Basilarchia.
[24] Darwinism, 1890 (1st Edition 1889), p. 264.
[25] Macrolepidoptera of the World. Fauna Americana, p. 98.
[26] Essays on Evolution, 1908, p. 381.
[27] These "unpalatable" butterflies are sometimes extensively preyed upon by insectivorous birds, when they fall an easier prey owing to their slowness (cf. p. [112]).