Synopsis This book, one in the series of book on animal groups and endocrinology, brings within purview the subject of insects and their hormones. Insects are no exception, role in their survival, development and reproduction, as they do for other animal groups. Hormones are largely secreted by the brain, and are liberated in the blood to keep the insect actively growing, or maybe directed to specific endocrine glands via the connective nerve to control molting, heart beat, sugar content of the blood, juvenile characteristics and egg production. The book not only delineates the role and functions of hormones in insects, it also makes efforts to chart out the ways in which hormones define the way insect life, in general is determined. The content devoted to underlining the scientific paraphernalia behind the study of insect hormones, as well as the illustrative diagrams, should enhance better understanding of the subject.