Selenoportax is a large sized bovid only present in the Siwaliks and hitherto its four species have been identified. Three species (Selenoportax vexillarius, S. lydekkeri, S. dhokpathanensis) are described from the Middle Siwaliks and one (S. tatrotensis) from the Upper Siwaliks. No species has been still found from the Lower Siwaliks. The present study is based on 16 specimens collected from Hasnot, the Middle Siwaliks and all the collected specimens belong to the species, S. vexillarius and S. lydekkeri but in this paper only the species S. vexillarius are described, comprising the nine specimens. This crucial finding leaves the position of S. tatrotensis and S. dhokpathanensis in doubt. The identification of the species is based on the cranial material.