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 Tropidolaemus Key to Philippine species. 1a. Longitudinal rows of dorsal body scales at midbody 21–23 (males), 21–29 (females); dorsal scales on head 9–16 along a line passing between the supraocular scales ( Fig. 46A ); third supralabial scale usually separated from subocular scale by one or two scales; color variable, shades of green, blue or green, and blue in females, and green in males, but blue in some Negros Island populations; crossbands on body blue and white, red and white, or blue, red and white; color of postocular stripe variable (females), white or red (males), or red (juveniles).................................................................... Tropidolaemus subannulatus 1b. Longitudinal rows of dorsal body scales at midbody 18–19 (males and females); dorsal scales on head 6–8 along a line between the supraocular scales ( Fig. 46B ); third supralabial scale usually in contact with subocular scale (rarely separated by one scale); in life: background body color turquoise-green (males) or green (females); postocular stripe usually black (rarely white)...................................................... Tropidolaemus philippensis