Padangia pulchra Werner, 1924, a forgotten monotypic taxon from Sumatra, is reexamined and found to be distinct from all known colubrid genera. Comparison with colubrids of possible affinity indicates that Padangia is most closely related to the monotypic Collorhabdium williamsoni Smedley of Malaya. The visceral anatomy of Padangia and Collorhabdium is described. As Werner's generic epithet is preoccupied by the mollusc Padangia Babor, 1900, Etheridgeum is proposed as a replacement name. Etheridgeum pulchrum is redescribed and illustrated.