PREFACE ix 
ADDITIONS AND CORRECTIONS TO THE ESSAYS AS 
ORIGINALLY PUBLISHED. 
Essays I. and II. are unaltered, but short notes are 
added at pp. 19, 24, 29, and 40. 
Til.—Mimicry, and other Protective Resemblances 
among Animals. 
PAGE 
53 Additional illustration of protective colouring in 
the case of the wood-dove and the robin. 
63 On moths resembling bird’s dung and mortar. 
86 Correction of some names of African Papilios and 
a reference to Mr. Trimen’s observations. 
89 Mr. Jenner Weir’s observation on birds which 
refused to eat Spilosoma menthrasti. 
102 An additional case of snake mimicry in Oxyrhopus 
trigeminus. 
107 Mr. Salvin’s case of mimicry among hawks. 
113 Name, Diadema anomala, added. 
117 to 122. Use of gay colours in caterpillars, with an 
account of Mr. Jenner Weir’s and Mr. Butler’s 
observations. : 
IV.—The Malayan Papilionide or Swallow-tailed 
Butterflies, as illustrative of the Theory of Natural 
Selection. 
135 to 140. Additions to the discussion on the rank of 
the Papilionide, and on the principles which 
determine the comparative rank of groups in the 
animal kingdom, 
