Synopsis The present paper deals with a taxonomic study of the Symbiotic Flagellates from some wood-inhabiting termites of the Families Kalotermitidae and Rhinotermitidae from different parts of India. However, Altogether 48 species of Flagellates recovered from 9 species of termite hosts have been dealt in the present work in details. Apart from this, keys to these flagellate species based on their morphological features have been incorporated for their easy identification. Further, a systematic list of these flagellates, bibliography, illustrations, tables, etc. are added features of the present contribution.