CONTENTS: 1. Origin and Evolution of Insects; 2. Elementary Knowledge of Collection and Preservation of Insects; 3. Classification and Identification of Economically Important Insect Orders; 4. Insect Integument; 5. Segmentation and Body Regions; 6. Digestive System; 7. Circulatory System; 8. Respiratory System; 9. Excretory System; 10. Reproductive System; 11. Post-embryonic Development; 12. Exocrine and Endocrine Glands; 13. Nervous System; 14. Sense Organs; 15. Bioluminescence and Sound Production; 16. Insects and The Abiotic Environment; 17. Insect Population and Pest Outbreak; 18. Insect-Plant Interaction; 19. Locusts and Termites; 20. Household Insects and Their Control; 21. Insects Injurious to Man and Livestock; 22. Insects Transmitting Disease in Plants (Aphids and Whiteflies); 23. Insects Injurious to Crops; 24. Methods of Insect Pest Management; 25. Beneficial Insects : Apiculture, Sericulture and Lac Culture; 26. Stored Grain Pests and Their Management (Safe Storage of Food Grains); 27. Ticks and Mites : Economic Importance; Glossary; Selected Readings.