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nydus/Contributions to the Theory of Natural SelectionPublic

This volume collects essays written by Alfred Russel Wallace regarding his independent discovery and development of the theory of natural selection. The author provides corrected and expanded versions of his previous scientific writings to demonstrate the scope and application of his findings.

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Table of Contents

INDEX.

  • Snakes, mimicry among, 101.
  • Song of birds, instinctive or imitative, 220.
  • Species, law of population of, 28; abundance or rarity of, dependent on the adaptation to conditions, 33; definition of, 141, 161; the range and constancy of, 143; extreme variation in, 163, 164.
  • Speed of animals, limits of, 292.
  • Sphecia craboniforme, 90.
  • Sphecomorpha chalybea, 96.
  • Sphegidæ, mimicked by flies, 97.
  • Spiders, which mimic ants, 98; and flower buds, 99.
  • Spilosoma menthastri, 88.
  • Stainton, Mr., on moths rejected by turkeys, 78, 88.
  • Stalachtis, a genus of Erycinidæ, the object of mimicry, 84.
  • Stinging insects generally conspicuously coloured, 72.
  • Streptocitta, 196.
  • Sturnidæ, sexual colouring and nidification of, 244.
  • Sturnopastor, 239.
  • St. Helena, 10.
  • Streptolabis hispoides, 93.
  • Struggle for existence, 28, 33.
  • Survival of the fittest, law of, stated, 33; its action in determining colour, 67.
  • Swainson’s circular and quinarian theory, 45.
  • Sylviadæ, sexual colouring and nidification of, 245.
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