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 Boiga Key to Philippine species and subspecies. 1a. Dorsal body scales in 19 or 23 longitudinal rows at midbody......................... 2 1b. Dorsal body scales in 21 longitudinal rows at midbody.............................. 5 2a. Dorsal body scales in 23 longitudinal rows at midbody; three anterior temporal scales; eighth infralabial scale anterior to center of eye ( Fig. 30A )...................... Boiga cynodon 2b. Dorsal body scales in 19 longitudinal rows at midbody; two anterior temporal scales; eighth infralabial scale posterior to center of eye ( Fig. 30B )................................ 3 FIGURE 30. Ventral-lateral view of head of (A) Boiga cynodon (KU 328496), (B) Boiga philippina (KU 304855). Eighth infralabial scale (purplish-gray). 3a. Number of preocular scales two; number of ventral body scales <250..... Boiga philippina 3b. Number of preocular scales one; number of ventral body scales> 250.................. 4 4a. Number of dark dorsal body crossbands ~40, each widening laterally....... Boiga angulata 4b. Number of dark dorsal body crossbands ~70, not widening laterally........ Boiga schultzei 5a. Dorsal color black, with most scales possessing a yellow or white speckle; yellow or white not arranged into distinct crossbands............................ Boiga dendrophila levitoni 5b. Dorsal color black, with yellow or white crossbands on body and tail.................. 6 6a. Yellow or white crossbands ≥ 2 scale rows wide, becoming wider laterally.................................................................. Boiga dendrophila latifasciata 6b. Yellow or white crossbands <2 scale rows wide that do not widen laterally............. 7 7a. Interspaces between narrow light crossbands black.......... Boiga dendrophila multicincta 7b. Interspaces between narrow light crossbands, which are edged with black, bluish gray to bluish brown............................................... Boiga dendrophila divergens