Part 6

Laws and Modes of Variation

Simple Variability

Polymorphism or Dimorphism

Local form or variety

Co-existing Variety

Race or Subspecies

Species

Variation as specially influenced by Locality

Local Variation of Size

Local Variation of Form

Local Variations of Colour

Remarks on the facts of Local Variation

Mimicry

Concluding Remarks on Variation in Lepidoptera

Arrangement and Geographical Distribution of the Malayan Papilionidae

Arrangement

Geographical Distribution

Range of the Groups of Malayan Papilionidae

Remarkable peculiarities of the island of Celebes

Concluding Remarks

V.--On Instinct in Man and Animals. Pp. 201-210

How Instinct may be best Studied

Definition of Instinct

Does Man possess Instincts?

How Indians travel through unknown and trackless Forests

VI.--The Philosophy of Birds' Nests. Pp. 211-230

Instinct or Reason in the Construction of Birds' Nests

Do Men build by Reason or by Imitation?