Originally published in 1915, this book was written by the renowned British geneticist Reginald Crundall Punnett (1875–1967). Intended to appeal to a broad range of readers, the text presents a concise discussion of mimicry in butterflies and the role of mimicry in the evolutionary process. Illustrative figures and notes are included. This book will be of value to anyone with an interest in butterflies, the development of evolutionary theory and the history of science.