THIMERESUIITJS. 431 



olive, yellowish, or reddish brown above, with more or less well de- 

 lined black or reddish-brown spots ; usually a series of yellow spots 

 along each side of the belly, and a black temporal band ; lower 

 parts pale green, olive or yellow, or brown with yellow spots ; tail 

 usually black and yello.v. 



Total length 2| feet ; tail 4-5 inches. 



Hub. Anaimalai Hills. 



533. Trimeresurus trigonocephalus. 



Vipera trigonocephala, Daud. Kept, vi, p. 175. 

 Cophias nigromarginatus, Kuhl, Beitr. p. 90. 

 Megaera trigonocephala and M. olivacea, Gray, Zool. Misc. p. 49. 

 Bothrops nigromarginatus, Dum. fy Bibr. Erp. G6n. vii, p. 1515. 

 Trimeresurus trigonocephalus, Giinth. Rept. B. I. p. 390 ; Theob. Cat. 

 p. 223. 



Snout very short ; rostral a little broader than deep ; upper 

 head-scales smooth, imbricate ; internasals large, in contact with 

 each other, sometimes fused to one shield ; supraocular large, 

 divided into two ; 4 or 5 scales in a transverse series between 

 the supraoculars ; two or three small postoculars and a subocular ; 

 the latter shield usually separated from the labials by one series of 

 scales; 9 or 10 upper labials, the second forming the anterior 

 border of the loreal pit. Scales smooth or faintly keeled, in 17 to 19 

 rows. Ventrals 147-152, the last notched or divided into two ; 

 anal entire ; subcaudals 57-67 pairs. Green above, uniform or 

 with black markings, which may form wavy dorsal bands ; a black 

 temporal streak ; upper surface with or without a network of black 

 bands ; ventrals yellowish, uniform or green at the base ; end of 

 tail usually black. 



Total length 31 inches ; tail 5. 



Hah. Ceylon. 



534. Trimeresurus macrolepis. 



Trimeresurus macrolepis, Beddome, Madras Journ. Med. Sc. 1863. 

 Peltopelor macrolepis, Giinth. Rept. B. I. p. 391, pi. xxiii, fig. C ; 

 Theob. Cat. p. 225. 



Eostral a little broader than deep ; nostril between two nasals ; 

 upper head-scales very large, imbricate, smooth ; supraoculars very 

 large, separated anteriorly by one scale, posteriorly by three ; inter- 

 nasals in contact or separated by one scale ; two postoculars and 

 a subocular ; the latter in contact with the third and fourth labials ; 

 7 or 8 upper labials, the second forming the anterior border of the 

 loreal pit. Scales, very large, strongly keeled, in 13 to 15 rows. 

 Ventrals 134-140 ; anal entire ; subcaudals 48-5(3 pairs. Uniform 

 bright green or olive above ; a whitish line along the outer row of 

 scales ; pale greenish beneath. 



Total length 26 1 inches ; tail 5. 



Hab. Anaimalai and Palni Hills, 4000-6000 feet. 



