386 OPHIDIA. 



We have received this species from Pinang, Mergui, the Lao Mountains (Cochinchina), 

 Khasya, Sikkim, Ladak, and Ningpo (China). It attains to a length of 32 inches, but is 

 generally smaller ; it is rather common, hanging from branches of trees, or concealed under 

 the dense foliage ; it feeds on small bii'ds and frogs. 



We have not the means of ascertaiiiing whether a snake common in the Andaman and Nicobar Islands, 

 and mentioned by Blyth, first as Trimesurus cantori (Journ. As. Soc. Beng. 1846, xv. p. 377), and after- 

 wards as Trimesurus viridis, var. cantori {I.e. 1861, xxix. p. Ill), really belongs to this species or not. 

 Probably it is distinct, but Blyth's notes do not contain characters sufficient to determine this point. 



Trimeeesurus erythrurus. 



Russell, Ind. Serp. ii. pi. 20. 



Trigonocephalus erythrui'us. Cantor, Proc. Zool. Soc. 183'J, p. 31. 



Trimesui'us albolabris, Gray, Zool. Misc. p. 48. 



Trigonocephalus viridis, Schley. Phys. Serp. ii. p. 544. pi. 19. figs. 12 & 13. 



The second upper labial shield forms the front part of the facial pit. Supranasals in 

 immediate contact with each other behind the rostral shield. Scales in 

 tvv^enty-one series, those on the crown of the head slightly keeled. Ventrals 

 150-164; subcaudals 54-70. Grass-green above, lighter on the sides. The 

 upper lip is whitish, sometimes with a pure white line running along the 

 whole side of the head, below the eye ; a whitish line along the outer series of scales. Lower 

 parts greenish white. Old females do not show either the white lips or the lateral line. 



The specimen described by Cantor (and still preserved in the Museum of the University of 

 Oxford) was from the Delta of the Ganges ; we have received it from Java, Siam, and China. 

 An old female measures 33 inches, the tail being 6 inches. 



Trimekesurus carinatus. 



Trimesurus carinatus. Gray, Zool. Misc. p. 48. 



bicolor. Gray, Ann. if Mag. Nat. Hist. 1842, xii. p. 392. 



porphyraceus, Blyth, Journ. As. Soc. Beng. 1861, xxix. p. 110. 



Cryptelytrops carinatus. Cope, Proc. Acad. Nat. So. Philad. 1859, p. 340. 



The second upper labial shield forms the front part of the facial pit. Scales in from 

 twenty-three to twenty-five rows ; those on the crown of the head and on the temples small, 

 strongly carinated. Ventrals 164-169 ; subcaudals 54-60. Grass-green above, tail yellowish 

 green; a more or less distinct yellowish line runs along the outer series of scales, and is 

 sometimes absent. Lower parts greenish white. 



We have received specimens of this species from Sikkim and Rangoon. An adult female 

 is 37 inches long, the tail measuring 6 inches. According to Blyth it would be common in 

 Lower Bengal. 



