NATRIX 95 



apparent on the body, even in the young. The widening of the 

 head in the temporal region is very characteristic, especially in 

 older specimens. A female contained five undeveloped eggs. 

 All the specimens 'were found in damp situations, usually under 

 leaves and trash along the edge of a small swamp. It is com- 

 mon at Bunawan. 



NATRIX DENDROPHIOPS Gunther 



This species appears to have two distinct forms in the Phil- 

 ippines, the typical form from Mindanao, and the second, from 

 Negros. They are distinguished as follows: 



Key to the subspecies of Matrix dendrophiops Giinther. 



a\ Scales in 17 rows.- _ N. d. dendrophiops (Gunther) (p. 9.5). 



a-. Scales in 19 rows _.._ N. d. negrosensis Taylor (p. 97). 



NATRIX DENDROPHIOPS DENDROPHIOPS (Gunther) 



Tropidonotus dendrophiops Gunthee, Ann. & Mag. Nat. Hist. V 

 11 (188.3) 136, fig.; Boulenger, Cat. Snakes Brit. Mus. 1 (1893) 

 264; BoETTGER, Ber. Senck. Nat. Ges. (1886) 109. 



?Tropidonotiis hypomelas Mullee, Verh. Nat. Ges. Basel. 1883) 

 286; III. Nacht. Cat. Herp. Samml. Basel Mus. (1883) 15. 



Natrix dendrophiops Griffin, Philip. Journ. Sci. § D 6 (1911) 257. 



Description of species. — (From No. 60, E. H. Taylor col- 

 lection ; collected at Bunawan, Agusan, Mindanao, September 

 15, 1913, by E. H. Taylor.) (Adult male.) Rostral large, 

 twice as wide as high, forming its longest suture with nasal, 

 only slightly visible from above; internasals longer than broad, 

 the suture between them equal to prefrontal suture; prefrontals 

 very wide, bending down on sides at a rather sharp angle ; 

 frontal longer than its distance from end of snout, not as long 

 as parietals or supraoculars, and not twice as wide as supra- 

 oculars, the anterior edge forming nearly a straight line ; parie- 

 tals moderate, longer than broad, in contact with upper post- 

 ocular and 1 or 2 temporals ; scales bordering parietals behind 

 numerous, small ; nostrils pierced between 2 nasals, the posterior 

 larger and higher ; prefrontals appear to enter nostrils above ; 

 loreal not as high as nasals, in contact with both preoculars, its 

 upper edge curving ; 2 preoculars, lower in contact with 2 labials, 

 upper separated from frontal; 3 postoculars, upper largest; 



temporals 2 + 3 ; 9 upper labials, 8 on left side where seventh 



and eighth are fused into a single scale ; fourth, fifth, and sixth 

 enter eye ; labials arranged in the following order of size : sev- 

 enth, ninth, eighth, sixth, fourth, fifth, third, second, first; 10 

 lower labials, 5 touching chin shields; mental broadly triangular; 



