Illustrated Key to the Snakes of the Philippines Author Weinell, Jeffrey L. Department of Ecology and Evolutionary Biology and Biodiversity Institute, University of Kansas, Lawrence, Kansas 66045; jweine2@gmail.com Author Hooper, Errol Department of Ecology and Evolutionary Biology and Biodiversity Institute, University of Kansas, Lawrence, Kansas 66045; Author Leviton, Alan E. Herpetology Division, Institute of Biodiversity Science & Sustainability, California Academy of Sciences, 55 Music Concourse Drive, San Francisco, California 94118. * Corresponding author; Email: jweine 2 @ gmail. com Author Brown, Rafe M. Department of Ecology and Evolutionary Biology and Biodiversity Institute, University of Kansas, Lawrence, Kansas 66045; text Proceedings of the California Academy of Sciences 2019 2019-09-30 66 1 1 49 journal article 299708 10.5281/zenodo.11512680 ccd739a4-10c3-4700-b27e-459bd82f1676 0068-547X 11512680 Rhabdophis Key to Philippine species. 1a. Dorsal body scales in 15–17 longitudinal rows at midbody; background color of ventral body scales black................................................................. 2 1b. Dorsal body scales in 17–19 longitudinal rows at midbody; background color of ventral body scales pale.................................................................. 3 2a. Light lateral body stripe not continuous across angle of jaw, separated from white patch behind eye............................................ Rhabdophis auriculatus auriculatus 2b. Light lateral body stripe continuous across angle of jaw to postocular region................................................................ Rhabdophis auriculatus myersi 3a. Dorsal body scales in 17 longitudinal rows at midbody.............................. 4 3b. Dorsal body scales in 19 longitudinal rows at midbody.............................. 5 4a. Pale dorsolateral body stripes present; pale nuchal spot present (except for hypermelanistic individuals from Lubang Island)............................... Rhabdophis spilogaster 4b. Pale dorsolateral body stripes absent; pale nuchal spot absent........ Rhabdophis barbouri 5a. Distinct white stripe extends across supralabial scales; one anterior temporal scale, in contact with the sixth supralabial scale; usually two preocular scales ( Fig. 45A ).. Rhabdophis lineatus 5b. No distinct white stripe on supralabial scales; two anterior temporal scales, neither in contact with the sixth supralabial scale; one preocular scale ( Fig. 45B )...... Rhabdophis chrysargos