Wall's keelback (Herpetoreas xenura) is a species of natricine snake endemic to Northeast India and Bangladesh .
Geographic range It is found in Khasi Hills in the Indian state of Meghalaya,. It is also found in Bangladesh and Myanmar.
References
Further reading Smith, M.A. 1943. The Fauna of British India, Ceylon and Burma, Including the Whole of the Indo-Chinese Sub-region. Reptilia and Amphibia. Vol. III. — Serpentes. Secretary of State for India. (Taylor and Francis, Printers). London. 583 pp. (Natrix xenura, p. 292.) Wall, F. 1907. Some new Asian snakes. J. Bombay Nat. Hist. Soc. 17 (3): 612–618. (Tropidonotus xenura, p. 616.)