A specimen of the colubrid genus Ahaetulla Link, 1807 collected in 2002 in Jambi Province, Sumatra, Indonesia, proves to be the first record of Ahaetulla mycterizans (Linnaeus, 1758) for this Indonesian island. This species was previously known from Java, West Malaysia and southern Peninsular Thailand. The discovery of this specimen constitutes an opportunity to redefine and illustrate this rare and poorly known species and to compare it with the more common Ahaetulla prasina (Boie, 1827). Additionally, an identification key of the species of Ahaetulla from the Indo-Malayan Region is proposed. This addition brings to 134 the number of snake species currently known from Sumatra Island.