TRIMERESURUS 295 



T. schultzei, the ventrals range from 187 to 203 and average 196 ; 

 the subcaudals range from 66 to 82 and average 71. The scales 

 are in 21 to 23 rov\^s, and those on the top of the head are flat 

 and smaller than in T. sumatraims. There are 10 scales between 

 supraoculars. In T. sumatranus the ventrals range from 180 to 

 191 and average 187 ; and the subcaudals range from 58 to 77 

 and average 68. 



The species is found only in Palav^^an. If the specimen of Tri- 

 meresvrus formosanus found in Palawan by Mr. Everett is re- 

 ferable to this form, as I strongly suspect, Trimeresurus suma- 

 tranus must of necessity be excluded from the Philippine fauna. 



TRIMERESURUS PHILIPPENSIS Gray 



Plate 37, fig. 1 



Trimeresurus philippens-is Gray, Zool. Misc. (1842) 48; Cat. Vip. 



Snakes (1849) 10. 

 Tropidolaemus Jtomhroni Guichenot, in Dumont d'Urville, Voy. Pole 



Sud; Peters, Mon. Berl. Ak. (1867) 29. 

 Trimeresurus wagleri philippensis Gray, Zool., Kept. (1853) 2.3, 



pi. 2, fig. 2; DUMERIL and Bibron, Erp. Gen. 7 (1854) 1527. 



Description of species. — (From an unnumbered specimen in 

 the Santo Tonias Museum, Manila; locality and collector 

 unknown.) Rostral higher than wide, visible above as a point; 

 nasal rather large, longer than high, nostril pierced near center, 

 appearing above as a mere line ; 2 rather enlarged prefrontals 

 forming a median suture; 3 scales bordering canthus rostralis 

 in front of eye ; supraocular enlarged, as long as, or longer than, 

 diameter of eye ; 7 scales between supraoculars ; head scales very 

 strongly keeled, erect, very rough in profile; pit surrounded by 

 1 large preocular which enters eye, a large loreal which is broken 

 up below into one or two small divisions, and another small scale 

 below preocular which does not enter eye ; upper preocular enters 

 eye; 8 upper labials, none entering pit or reaching suboculars, 

 second and third largest, separated from subocular by a row of 

 scales; temporals not enlarged; 8 lower labials, first pair mi- 

 nutely in contact behind mental ; first pair of chin shields largest, 

 longer than wide, followed by 3 pairs of smaller scales ; scales in 

 19 rows on neck and on middle of body; ventrals, 132; anal 

 single ; subcaudals, 49 ; tail prehensile. 



Color. — Above, greenish with 56 darker transverse bars 

 composed of dark black background, each scale with a green 

 center ; these bars are two or three scales wide dorsally and ex- 

 tend about halfway down on side where they continue as a very 

 thin zigzag line crossing ventral surface, but rarely meeting ; bars 



