188 SNAKES OF THE PHILIPPINE ISLANDS 



part of upper labials yellow; chin and lower labials yellow, 

 latter with dark dots; a dark line on underside of tail. 



Measurements of Calamaria ^ervaisii gervaisii Dumeril and Bibron. 



zum. 

 Total length 260 



Snout to vent 247 



Tail 13 



Length of head 7.5 



Width of head 5.5 



Variation. — The chief differences in specimens are sexual. 

 The females have longer bodies and shorter tails than the males, 

 and a correspondingly larger number of ventrals and smaller 

 number of subcaudals. The length of the tail in the females 

 is contained in the total body length twenty times ; in the males, 

 fourteen times. 



itemai'ks. — The females lay from three to six eggs, which are 

 usually three times as long as wide. The young agree very 

 well with the adults in coloration. A very common species. Due 

 to its gregarious habits it is known to many Filipino peoples as 

 ahas-na-cuyog. The subspecies is restricted to the Philippines; 

 known to occur in Luzon. 



CALAMARIA GERVAISII IRIDESCENS Taylor 



Calamaria gei-vaisii iridescens Taylor, Philip. Journ. Sci. § D 12 

 (1917) 360. 



Description of subspecies. — (No. 201, E. H. Tayor collec- 

 tion ; collected on Canlaon Volcano, Occidental Negros, De- 

 cember 23, 1915, at an elevation of about 900 meters, by E. H. 

 Taylor.) (Adult female.) Rostral a little deeper than broad, 

 the part visible above equal to the suture between prefrontals; 

 internasals absent; prefrontal very large, about as broad as 

 long, touching 2 labials laterally; loreal absent; frontal much 

 longer than its distance from end of snout, twice as wide as 

 supraoculars, shorter than and not as wide as parietals ; nostril 

 pierced in a minute nasal, latter fan-shaped ; 1 preocular, very 

 small; supraocular scarcely twice as long as wide; 1 small 

 postocular; 5 upper labials, last largest, third and fourth en- 

 tering eye; an elongate posterior temporal behind fifth labial, 

 bordering parietal; mental as deep as wide, touching chin 

 shields ; 3 labials touch first pair of chin shields, which are much 

 larger and slightly wider than second pair; scales in 15 rows; 

 ventrals 178, subcaudals 14; anal single; tail length 21.8 in total 

 length. 



