The present part of the document includes 20 chapters pertaining to invertebrates. Insects comprising of 240 species and crabs 521 species (Table-2). Among the insects, only six orders viz.. Collembola, Thysanura, Odonata, Orthoptera, Coleoptera and Hymenoptera are dealt. The first four orders are comprehensively studied; however 12 families of order Coleoptera and two families of Hymenoptera are included. For the first time f consolidated information on Collembola of Andaman and Nicobar Islands involving 18 species under 11 genera of 3 families are studied. The key to the families, genera and species have also been provided. Only three species of Thysanura are reported. Altogether, 69 species/subspecies belonging to 39 genera under 11 families of Odonata are reported. The Orthoptera : Acridoidae is reported comprising 22 species under 2 families and 18 genera. The 12 families of Coleoptera viz. Silvanidae (16 species), Colydidae ( 8 species), Bothrideridae (4 species), Erotylidae (9 species). Languriidae (2 species), Endomychidae (3 species), Discolomidae (3 species), Monotomidae (7 species), Inopeplidae (4 species), Propalticidae (1 species), Dytiscidae (33 species), Staphylinidae (147 species) and two families of Hymenoptera viz. Sphesidae (12 species) and Encyrtidae (25 species) are dealt in the document. Diversity and distribution of 521 species belonging to 246 genera and 56 families of brachyuran crabs is also included.
1. Overview
2. Insecta: Collembola apterygota/A.K. Hazra and G.P. Mandal
3. Insecta: thysanura apterygota/A.K. Hazra, G.P. Mandal and Anand Kumar A
4. Insecta: orthoptera: acridoidea/Anita Dey
5. Insecta: Odonata/Supriya Nandy and R. Babu
6. Insecta: coleoptera: silvanidae/T.K. Pal and B. Baraik
7. Insecta: coleoptera: colydiidae/T.K. Pal
8. Insecta : coleoptera: Bothrideridae/T.K. Pal
9. Insecta: coleoptera: erotylidae/T.K. Pal
10. Insecta: coleoptera: languriidae/T.K. Pal
11. Insecta: coleoptera: endomychidae/T.K. Pal
12. Insecta: coleoptera: Discolomidae/T.K. Pal
13. Insecta: coleoptera: monotomidae/T.K. Pal
14. Insecta: coleoptera: Inopeplidae/T.K. Pal
15. Insecta: Coleoptera: propalticidae/T.K. Pal and B. Baraik
16. Insecta: coleoptera: adephaga: dytiscidae/Sujit Kr. Ghosh
17. Insecta: coleoptera: staphylinoidea: staphylinidae/A. Sar
18. Insecta: hymenoptera: aculeata: sphecidae/B.G. Kundu, S.N. Ghosh and R.N. Tiwari
19. Insecta: hymenoptera: chalcidoidea: encyrtidae: encyrtinae/Sarfrazul Islam Kazmi
20. Insecta: hymenoptera: chalcidoidea: encyrtidae: tetracneminae/Sarfrazul Islam Kazmi
21. Brachyuran crabs crustaceae/M.K. Dev Roy and N.C. Nandi