This classic text is presented in a revised and expanded Third Edition. The balanced text divides the broad topic into four major areas: Evolution and Diversity, Anatomy and Physiology, Reproduction and Development, and Ecology. Based on exciting discoveries of the past decade, new emphasis is placed on such topics as insect evolutionary relationships; semiochemicals; gas exchange; immune responses (including those of parasites and parasitoids); flight; and the management of pests. The book includes more than 30 new or significantly revised figures.