118 SNAKES OF THE PHILIPPINE ISLANDS 



d\ Anterior maxillary teeth, increasing in size to eighth which is 

 much enlarged, followed by an interspace, followed by 3 

 small and 3 large teeth; scales in 17 rows. 



Haplonodon Griifin (p. 126). 



d '. Anterior maxillary teeth, 15 to 20, increasing in size toward the 



middle of the series, then decreasing to the last 2 or 3 which 



are large; anterior mandibular teeth large; scales in 17 rows. 



Stegoiiotus Dumeril and Bibron (p. 129). 



c\ Scales with or without apical pits (absent in Philippine species) ; 



scales smooth; maxillary teeth, 8 to 10, rather short but stout, 



increasing in size posteriorly; anterior mandibular teeth slightly 



larger than posterior; scales in 13 or 15 rows. 



Dryocalamus Gunther (p. 131). 

 b''. Pupil round. 



c\ Longitudinal scale rows in even numbers; maxillary teeth, 20 to 23, 

 increasing in size' posteriorly; scales in 14 to 18 rows, with apical 



pits. Large snakes Zaocys Cope (p. 134). 



c'. Longitudinal scale rows in odd numbers. 



d \ Ventrals and subcaudals not or but feebly keeled. 



e\ Maxillary teeth, 8 to 12, posteriorly compressed; scales in 13 

 to 21 rows, smooth or feebly keeled, with or without apical 



pits Holarchus Cope (p. 138). 



e". Similar to Holarclius; maxillary teeth, 6 to 8, posteriorly com- 

 pressed; pterygoid teeth absent, palate without teeth, or with 

 2 or 3 on each palatine; scales in 15 to 17 rows. 



Oligodon Boie (p. 146). 

 e^ Maxillary teeth equal or nearly so, or posterior ones slightly 

 decreasing in size. 

 / '. Scales with apical pits. Large snakes. 



g^. Scales in 23 to 27 rows Gonyosoma Wagler (p. 152). 



, g'. Scales in 21 rows -- Elaphe Fitzinger (p. 155). 



/-. Scales without apical pits -. liopeltis Fitzinger (p. 161). 



d '. Ventral and subcaudal scales strongly keeled and notched. 



e'. Maxillary teeth, 20 to 33, slightly enlarged posteriorly; median 

 scale row distinctly enlarged; scales in 13 to 15 rows, with 



apical pits.- - -- Dendrophis Boie (p. 165). 



c". Maxillary teeth, 18 to 23. anterior longest; median scale row 

 not or but slightly enlarged; scales in 13 to 15 rows, with 



apical pits.- Dendrelaphis Boulenger (p. 169). 



0.'. No anterior temporals; parietals in contact with labials. 

 6'. Internasals present. 



c-'. Eye distinct Pseudorhabdium Boulenger (p. 177). 



c'. Eye hidden Typhlogeophis Giinther (p. 182). 



Ir. Internasals absent; eye distinct - Calaniaria Boie (p. 183). 



Genus OPHITES Wagler 



Lycodon, part., BoiE, Isis (1827) 521; Wagler, Syst. Aniph. (1830) 

 186; SCHLEGEL, Phys. Serp. 2 (1837) 104; Dumeril and Bibron, 

 Erp. Gen. 7 (1854) 367; Gunther, Cat. Col. Snakes (18B8) 201; 

 Kept. Brit. India (1864) 315; Jan, Elenco Sist. Ofid. (1863) 95. 



