viii CONTENTS 
of Protective Colouring—Objection that Colour, as being dangerous, 
should not exist in Nature—Mimicry—Mimicry among Lepidoptera 
—Lepidoptera mimicking other Insects—Mimicry among Beetles— 
Beetles mimicking other Insects—Insects mimicking Species of other 
Orders—Cases of Mimicry among the Vertebrata—Mimicry among 
Snakes—Mimicry among Birds—Mimicry among Mammals—Objec- 
tions to Mr. Bates’s Theory of Mimicry—Mimicry by Female Insects 
only—Cause of the dull Colours of Female Birds—Use of the gaudy 
Colours of many Caterpillars—Summary—General deductions as to 
Colour in Nature—Conclusion . : . . Pages 34-90 
IV. On Instryort in Man anp ANIMALS 
How Instinct may be best Studied—Definition of Instinct—Does Man 
possess Instincts ?—How Indians travel through unknown and track- 
less Forests : j , . 91-97 
V. THe Puinosopuy or Birps’ Nests 
Instinct or Reason in the Construction of Birds’ Nests—Do Men build by 
Reason or by Imitation ?—Why does each Bird build a peculiar kind 
of Nest?—How do young Birds learn to build their first Nest? 
Do Birds sing by Instinct or by Imitation }—How young Birds may 
learn to build Nests—The Skill exhibited in Nest-building Ex- 
aggerated—Man’s Works mainly Imitative—Birds do Alter and 
Improve their Nests when altered Conditions require it—Conclusion 
98-117 
VI. A THEory or Brrps’ Nests 
Changed Conditions and persistent Habits as influencing Nidification— 
Classification of Nests—Sexual differences of Colour in Birds—The 
Law which connects the Colours of Female Birds with the mode of 
Nidification—What the Facts Teach us—Colour more variable than 
Structure or Habits, and therefore the Character which has generally 
been Modified—Exceptional cases confirmatory of the above Explana- 
tion—Real or apparent exceptions to the Law stated at page 124— 
Various modes of Protection of Animals—Females of some groups 
require and obtain more Protection than the Males—Conclusion 
118-140 
VII. Creation sy Law 
Laws from which the Origin of Species may be deduced—Mr. Darwin’s 
Metaphors liable to Misconception—A case of Orchid-structure ex- 
