CHECK-LIST AND KEY OF PHILIPPINE SNAKES. 259 



b^. Not more than 100 subcaudals. Uniform brown above, whitish below. 



Stegonotus muelleri Dumeril et Blbron. 



Samar (Dumeril and Bihron) ; Cubo-cubo, Samar (Peters). Not 



recorded from any other place. 



b'. One hundred and twelve to 123 subcaudals. Grayish brown above with a 



median row of dark brown spots, and a row of smaller spots on each 



side; yellowish beneath Stegonotus dumerilii Boulenger. 



Surigao (Giinther) ; Daraga, Iraga Volcano (Peters). Limited to 

 the Philippines. 

 '. Anterior and middle maxillary teeth not enlarged; posterior increasing in 



size, or the last strongly enlarged. 

 6'. Palatine and pterygoid bones toothed; pupil vertically elliptic. Maxillary 



teeth 8 to 10 Dryocalamus philipplnus GrifBn. 



Iwahig, Palawan (Bureau of Science collection). A single specimen 

 only is known. Length, 241 millimeters. Black above, with 3 narrow, 

 white longitudinal stripes ; lower surface white. 

 i'. Palatine and pterygoid bones toothed; pupil round. 



c'. Longitudinal series of scales in even numbers; maxillary teeth 20 to 23. 



Genus Zaocys. 



(P. Scales in 14 rows Zaocys luzonensis Giinther. 



Luzon (CfUnther). Only the type specimen appears to be re- 

 corded. 

 d'. Scales in 16 or 18 rows; 2 median dorsal rows of scales keeled. Dark 

 brown. This snake can be recognized instantly by the dorsal keels. 



Zaocys carinatus Giinther. 

 Iwahig, Palawan {Bureau of Science collection) . Three specimens 

 were recently captured in Palawan, where the snake is said to h» 

 common. This species has been found in Borneo, Sumatra, and the 

 Malay Peninsula, but has not been recorded before from the Phil- 

 ippines. A large snake, reaching a length of 3 meters. 

 e'. Longitudinal series of scales in odd numbers ; ventrals rounded laterally. 



Maxillary teeth 8 to 12, posteriorly compressed Genus Holarchus. 



(f . Two superposed anterior temporals. Dark brown, with an indistinct, 



lighter, vertebral stripe Holarchus octolineatus (Schneider). 



Tawi Tawi (Boulenger). Found in Java, Borneo, Sumatra, 

 Malay Peninsula, and southern India. 

 d'. A single anterior temporal. Above, light brown with transverse 

 black-edged blotches. Rosy pink below, when alive. 



Holarchus pheenochalinus (Cope). 



Luzon (Boulenger) ; Manila (Cope); southern Mindanao (J. G. 



Fischer) ; Daraga, Luzon (Peters) ; Manila, Benguet, Zambales 



(Bureau of Science collection). Known also from Java: 



e'. Longitudinal series of scales in odd numbers; ventrals with suture-like 



lateral keels, and a notch on each side corresponding to the keel. 



Scales of dorsal row large Genus Dendrophis. 



d'. Scales in 15 rows. Olive, bronzy brown, or dark blue above. Usually 

 striped along the sides. Lower parts greenish. 



Dendrophis pictus ( Gmelin ) . 

 Manila (Dumeril and Bibron) ; Daraga, Albay; Mount Santik; 

 Passino; Camarines (Peters) ; Loquilocun, Samar (Peters) ; Min- 

 danao (Dumeril and Bibron), southern Mindanao (J. G. Fischer) ■ 

 106713 3 



