Synopsis Entomology is the scientific study of insects, a branch of arthropodology. At some 1.3 million described species, insects account for more than two-thirds of all known organisms, date back some 400 million years, and have many kinds of interactions with humans and other forms of life on earth. It is a specially within the field of biology. Though technically incorrect, the definition is sometimes widened to include the study of terrestrial animal in other arthropod groups or other phyla, such as arachnids, myriapods, earthworms and slugs. This book aims at to provide a comprehensive, well illustrated, up to date, general and applied account of entomology which is written in a simple and lucid language. This book will serve as a valuable reference source on this subject and would be of great importance for students, teachers and researchers and those interested in protecting the pulses and oilseed crops from insect pests.