The present publication is intended primarily to serve the needs of those who teach or study entomology as academic subject. The publication includes Insect Nutrition, Feeding, The Tracheal System, Aquatic Respiration in Insects, The Circulatory System, Nitrogenous Excretion and Salt and Water Regulation, The Nervous System and Sensory System etc. It is our earnest hope that the publication will be of great value to all our students of entomology and agricultural science in several Indian universities.
