IT is just twenty years ago since the late Charles Darwin called the writer's attention to a little paper, by Fritz Müller, published in Kosmos for May 1879, and containing a new suggestion concerning the theory of mimicry. It was the writer's misfortune to have foreseen that the principle discovered by Müller was likely to exert a profound influence on certain biological problems of which the solution had up to that time been un-attempted, and he accordingly introduced the new idea to the entomologists of this country by inserting a translation of the paper in the Proceedings of the Entomological Society of London.
"Natural Selection the Cause of Mimetic Resemblance and Common Warning Colours." By Edward B. Poulton, M.A., F.R.S. (Journ. Linn. Soc. Zoology, vol. xxvi. pp. 558–612.)