[509] See also, on this subject, Mr. Weir’s paper in ‘Transact. Ent. Soc.’ 1869, p. 23.
[510] ‘Westminster Review,’ July, 1867, p. 16.
[511] For instance, Lithosia; but Prof. Westwood (‘Modern Class. of Insects,’ vol. ii. p. 390) seems surprised at this case. On the relative colours of diurnal and nocturnal Lepidoptera, see ibid. p. 333 and 392; also Harris, ‘Treatise on the Insects of New England,’ 1842, p. 315.
[512] Such differences between the upper and lower surfaces of the wings of several species of Papilio, may be seen in the beautiful plates to Mr. Wallace’s Memoir on the Papilionidæ of the Malayan Region, in ‘Transact. Linn. Soc.’ vol. xxv. part i. 1865.
[513] ‘Proc. Ent. Soc.’ March 2nd, 1868.
[514] See also an account of the S. American genus Erateina (one of the Geometræ) in ‘Transact. Ent. Soc.’ new series, vol. v. pl. xv. and xvi.
[515] ‘Proc. Ent. Soc. of London,’ July 6, 1868, p. xxvii.
[516] Harris, ‘Treatise,’ &c., edited by Flint, 1862, p. 395.
[517] For instance, I observe in my son’s cabinet that the males are darker than the females in the Lasiocampa quercus, Odonestis potatoria, Hypogymna dispar, Dasychira pudibunda, and Cycnia mendica. In this latter species the difference in colour between the two sexes is strongly marked; and Mr. Wallace informs me that we here have, as he believes, an instance of protective mimickry confined to one sex, as will hereafter be more fully explained. The white female of the Cycnia resembles the very common Spilosoma menthrasti, both sexes of which are white; and Mr. Stainton observed that this latter moth was rejected with utter disgust by a whole brood of young turkeys, which were fond of eating other moths; so that if the Cycnia was commonly mistaken by British birds for the Spilosoma, it would escape being devoured, and its white deceptive colour would thus be highly beneficial.
[518] ‘Rambles of a Naturalist in the Chinese Seas,’ 1868, p. 182.