A new species of the pseudoscorpion genus Metawithius Chamberlin, 1931 is described from Kerala, India. Detailed morphological descriptions, diagnostic features and illustrations of Metawithius keralensis Johnson, Mathew, Sebastian & Joseph, sp. nov. are provided. Detailed redescription and illustrations of M. nepalensis (Beier, 1974) are also provided. The current distribution of all the known Metawithius species is mapped. Metawithius parvus (Beier, 1930) from Travancore, India is recognised as a species of Chernetidae.