III.—Mimicry and other Protective Resemblances among Animals.
First published in the “Westminster Review,” July, 1867. Reprinted with a few corrections and some important additions, among which I may especially mention Mr. Jenner Weir’s observations and experiments on the colours of the caterpillars eaten or rejected by birds.
IV.—The Malayan Papilionidæ, Or Swallow-Tailed Butterflies, as Illustrative of the Theory of Natural Selection.
First published in the “Transactions of the Linnæan Society,” Vol. XXV. (read March, 1864), under the title, “On the Phenomena of Variation and Geographical Distribution, as illustrated by the Papilionidæ of the Malayan Region.”
The introductory part of this essay is now reprinted, omitting tables, references to plates, &c., with some additions, and several corrections. Owing to the publication of Dr. Felder’s “Voyage of the Novara” (Lepidoptera) in the interval between the reading of my paper and its publication, several of my new species must have their names changed for those given to them by Dr. Felder, and this will explain the want of agreement in some cases between the names used in this volume and those of the original paper.
V.—On Instinct in Man and Animals.
Not previously published.
VI.—The Philosophy of Birds’ Nests.
First published in the “Intellectual Observer,” July, 1867. Reprinted with considerable emendations and additions.
VII.—A Theory of Birds’ Nests; Showing the relation of certain differences Of Colour in Birds To their mode of Nidification.