Xenochrophis trianguligerus (Boie, 1827)

(Fig. 6 f)

Material examined. 3 specimens examined alive and photographed, from Maninjau, Mukomuko and Bayur respectively, Province of Sumatera Barat, elev. 480– 500 m.

Taxonomic comments. These specimens as typical for this species as depicted in Chan-Ard et al. (1999).

Distribution on Sumatra. Provinces of Aceh, Sumatera Utara, Sumatera Barat, Riau, Jambi, Bengkulu, Sumatera Selatan, and Lampung (David & Vogel, 1996); also the islands of Bangka, Belitung and Nias, and Riau Archipelago.

Biology. The specimen from Maninjau was observed near human dwellings, whereas the specimen from Mukomuko was found dead on a road edging an area of forest and cultures. Lastly, the specimen from Bayur was obtained in a rice field in the end of the afternoon.