1912. The Insect Enemies of the Cotton Boll Weevil. U. S. Dept. Agr., Bur. Ent., Bull. No. 100. pp. 99.
An excellent example of the character of the competition with which an animal meets when extending its range into new territory. See diagram, p. 44.
Wheeler, W. M.
1906. An Ethological Study of Certain Maladjustments in the Relations of Ants to Plants. Bull. Amer. Mus. Nat. Hist., Vol. XXII, pp. 403-418.
Competition between plants and ants.
Massart, J., and Vandervelde, E. (Trans. W. Macdonald.)
1907. Parasitism Organic and Social. Second Edition. Revised by J. Arthur Thompson, pp. 124. London.
Contains many examples of responses to a parasitic environment.
Selected References on the Struggle for Existence
(Alphabetically arranged)