Lycodon Key to Philippine species. 1a. Ventral body scales and subcaudal scales strongly keeled; dorsal body scales in 15 longitudinal rows at midbody.............................................. Lycodon philippinus 1b. Ventral body scales and subcaudal scales smooth; dorsal body scales in 17 longitudinal rows at midbody.................................................................... 2 2a. Subcaudal scales in> 130 pairs...................................... Lycodon fausti 2b. Subcaudal scales in 100 pairs................................................. 5 4b. Subcaudal scales in 200; vertebral scales> 205....................... Lycodon alcalai 6b. Ventral body scales 50 on body,> 27 on tail; tail length 36–45% (usually> 38%) of snout-vent length..................................................... Lycodon muelleri 8b. Dorsal light crossbands 20 on body,> 15 on tail.................... Lycodon bibonius 9b. Dorsal light crossbands <20 on body, <15 on tail................................ 10 10a. Body and tail with dark rings completely encircling the body; number of supralabial scales usually ten (fourth through sixth border eye); dorsal body scales reducing to 15 longitudinal rows at approximately ventral 119................................... Lycodon ferroni 10b. Dorsal part of body and tail with dark crossbands often extending onto lateral edges of ventral body scales, but not completely encircling the body; number of supralabial scales 8–9 (fourth and fifth border eye); dorsal body scales reduce to 15 longitudinal rows between ventral body scales 131–145............................................. Lycodon dumerili

Published as part of Weinell, Jeffrey L., Hooper, Errol, Leviton, Alan E. & Brown, Rafe M., 2019, Illustrated Key to the Snakes of the Philippines, pp. 1-49 in Proceedings of the California Academy of Sciences 66 (1) on pages 28-29, DOI: 10.5281/zenodo.11512680