Chapter 6. C. B. Huffaker, C. E. Kennett, B. Matsumoto, E. G. White. 1968. Some parameters in the role of enemies in the natural control of insect abundance. Pages 59-75. In: T. R. E. Southwood (editor). Insect Abundance. Proceedings of a meeting held 21-22 September 1967 at the Imperial College, London, Symposium No. 4, Royal Entomological Society of London, Bartholomew Press, Dorking, Surrey, Great Britain, 160 pages.

Keywords: techniques of analysis of enemy action, a neglected parameter in the use of models, the functional, numerical, and overall responses, the limiting meaning of the functional response in control, the numerical response, the economic consequences of lag-time, where outside disturbances are not superimposed on such a host-parasite system, searching capacity is far more important than reproductive capacity, two Anagasta/Exidechthis ecosystem