Contents: Introduction. Tricho-taxonomy. Hair characteristics of mammals. Methodology. Microscopic structures of dorsal guard hairs of Indian Mammalian species. Order Carnivora: 1. Larger cats. 2. Smaller cats. 3. Bears. 4. Hyena and dogs. 5. Red panda. 6. Otters, badgers, weasels and martens. 7. Palm civets and civets. 8. Mongooses. Order Artiodactyla: 9. Pig. 10. Mouse deer. 11. Deer. 12. Cattle antelopes, sheep, goats. Order Primates: 13. Lorises. 14. Gibbon. 15. Macaques. 16. Langurs. Order Rodentia (Sciuridae): 17. Giant squirrels. Order Lagomorpha: 18. Hares. 19. Pikas. Order Pholidota: 20. Pangolins. References.