On the synonymy of Pseudagrion bidentatum Morton, 1907, with P. hypermelas Selys, 1876

No new information on Pseudagrion bidentatum has been published since its original description by Morton in 1907 based on a single male from western India. Although this species was already regarded as a synonym of either P. hypermelas Selys, 1876, or P. spencei Fraser, 1922, by Fraser in 1933 it was still treated as a valid species on later checklists. Based on a study of the original description and the holotype held at the National Scottish Museum, Edinburgh, we conclude that P. bidentatum is a junior synonym of P. hypermelas.