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IN T R O D U C T IO N .......................................................................................... ................. ..... LITERATURE REVIEW........................ ........................................4 A. On General Edaphic Factors ............................................4 B. On Soil Pollution ........................................5....... ...............5 M ATERIALS AND M ETHODS ........................................................................ 10 A. Sites of Sampling............................... ............ 10 B. Method of Sampling ......................... ............................... 10 C. Extraction of Samples ............................................................. 12 D. Analysis of Abiotic Factors ................................. ........... 2 O B S E R V A T IO N S .......................................................................................... ........................ 16 A. Systematic Account .......................... .............. ................... 17 Subfamily DORYLINAE......................................... 17 Genus Dorylus Fabricius ............................................. 17 1. Dorylus orientalis W estwood, 1835 ................................................. 17 Subfamily PONERINAE ......................... .......................... 18 Genus Amblyopone Erichson ......................................... 18 2. Amblyopone rothneyi Forel, 1900 ......................... ............. ... .......................... 18 Genus Anochetus M ayr ..................................................................... 19 3. Anochetus graeffei Mayr, 1870 ........................................ 19 Genus Diacam m a M ayr .................................................................. 20 4. Diacamma rugosum (Le Guillou, 1842) ....................... ........ .................. 20 Genus Hypoponera Santschi .............................................. 21 5. Hypoponera truncata (Smith, 1860) ........................ ................................ 21 Genus Pachycondyla Smith .................... ....................... .......... 22 6. Pachycondyla rufipes (Jerdon, 1851) ............................................ ...... 22 Subfam ily CERAPACHYINA E ........................................ ..................... 22 G enus Cerapachys Sm ith ................................................................................ 23 7. Cerapachys typhlus (Roger, 1861) ........................................ 23 Subfamily DOLICHODERINAE ................... .................. 23 Genus Tapinoma Foerster ........................................... 24 8. Tapinoma melanocephalum (Fabricius, 1793) ....................... 24 Genus Technomyrmex Mayr .................................. 24 9. Technomyrmex albipes (Smith, 1861) ................................ 24 Subfamily FORMICINAE .................................... 25 Genus Camponotus Mayr .................................... 25 10. Componotus compressus (Fabricius, 1787).............................. 25 Genus Paratrechina Motschoulsky ................... ............... 26 11. Paratrechina longicornis (Latreille, 1802) ..................... ...... 26 Genus Plagiolepis M ayr ........................................................ ................... ... 27 12. Plagiolepis jerdonii Forel, 1894 ................................ 27 Genus Polyrhachis Smith ..................................... 28 13. Polyrhachis tubericeps Forel, 1893 ......................... ........... . ...................... 28 Subfamily PSEUDOMYRMECINAE ................................... 28 Genus Tetraponera Smith .................................... 29 14. Tetraponera allaborans (Walker, 1859) ...................... ........ 29 Subfamily MYRMICINAE ....................................................... 29 Genus Cardiocondyla Emery ........................................ 30 15. Cardiocondyla nuda (Mayr, 1866) ................... ................ 30 Genus Carebara Westwood ................................... 31 16. Carebara lignata W estwood, 1840 ................................................... .............. 31 Genus Crematogaster Lund .................................................... 32 17. Crematogaster rothneyi Mayr, 1879 ................................. 32 Genus Lophomyrmex Emery .................................. 32 18. Lophomyrmex quadrispinosus (Jerdon, 1851) ......................... .............. .... 32 Genus Meranoplus Smith .................................... 33 19. Meranoplus bicolor (Guer., 1844)................................... .............. 33 Genus M essor Forel ......................................................... 34 20. Messor barbarus (Linnaeus, 1767) .................................. 34 Genus Monomorium Mayr ...................... ................... 35 21. Monomorium floricola (Jerdon, 1851) ........................... .......... ..... 35 Genus Oligomyrmex M ayr ...................................... ........................... 36 22. Oligomyrmex asinus Forel, 1902 ........................ .. .................. 36 G enus Pheidole W estw ood ......................................................... .................... 37 23. Pheidole roberti Forel, 1902 ............................... ...... .............. 37 Genus Pheidologeton Mayr ................................... 38 24. Pheidologeton diversus (Jerdon, 1851) ...................... ......... 38 Genus Recurvidris Bolton ......................................... ................... 39 25. Recurvidris recurvispinosa (Forel, 1890) ............................ 39 Genus Solenopsis Westwood .................................................... 40 26. Solenopsis geminata (Fabricius, 1804) ...................... ......... 40 Genus Tetram orium M ayr .................................................................... 41 27. Tetramorium walshi (Forel, 1890) .................... .................. 41 B. Faunal Com position ........................................ ...................... 42 C. Seasonal Variation ................................... ....... ................... ................. 46 D. Comparative Study ........................................ ................. 74 E . B ioassay .................................... ........................... ............ 9 1 F. Statistical A nalysis .......................... . ................ .... ................... .......................... 92 D ISC U S SIO N ........................................ .................... .... ..... ..................................... 125 SUM M ARY .................................................. ........ ................. 137