426 



Synopsis of Indian, Ceylonese, and Burmese Species. 



A. Scales in 21 or 23 rows ; 5 to 11 scales in a 

 transverse series between supraoculars ; tail 

 not prehensile. 

 fl. Supraoculars large, separated by 5 to 8 series 



of scales ; scales feeoly keeled T. monticola, p. 426. 



bj Supraoculars small, sometimes broken up, 

 separated by 8 to 11 series of scales ; scales 



feebly keeled T. striyatus, p. 427. 



c. Supraoculars large ; scales strongly keeled. . T.jerdonii, p. 427. 

 13. Scales in 25 to 31 rows ; 12 to 16 scales in a 

 transverse series between the supraoculars ; 

 tail slightly prehensile. 



a. Ventrals 200-218 ; subcaudals 76-92 ; scales [p. 423. 



strongly keeled, in 25 or 27 rows T. mucrosyuamatus, 



b. Ventrals 174-184; subcaudals 55-76 ; scales 



rather feebly keeled, in 27 to 31 rows. ... T. cantoris, p. 428. 



c. Ventrals 160-1/32 ; subcaudals 53-75 ; scales [p. 429. 



strongly keeled, in 25 or 27 rows T.purpureomaculatus, 



C. Scales in 13 to 23 rows ; tail prehensile. 



a. 7 to 13 scales in a transverse series between 



supraoculars ; scales in 19 to 23 rows. 



'. Subcaudals 53-75 ; temporal scales smooth. T. yrammeits, p. 429. 



b'. Subcaudals 44-58 ; temporal scales ob- [p. 430. 



tusely keeled T. anamaUewis, 



b. 4 or 5 scales in a transverse series between 



supraoculars; scales in 17 or 19 rows ; last [p. 431. 



ventral shield notched or divided T. triyonocephalus, 



c. Upper head-scales very large, shield-like ; 



scales in 13 or 15 rows , T. macrulepis, p. 431. 



525. Trimeresurus monticola. 



Farias maculata, Gray, A. M. N. H. (2) xii, 1853, p. 392 (nee Gray, 



1842). 

 Trimeresurus monticola, Gilnth. Rept. B. I. p. 388, pi. xxiv, fig. B; 



Stoliczka, J. A. S. B. xl, 1871, p. 445 ; Fayrer, Thanatoph. pi. xv ; 



Theob. Cat. p. 220; Anders. An. Zool. Res. Yunnan, p. 832, 



pi. Ixxvi, figs. 4 & 5. 

 Trimeresurus convictus, Stoliczka, J. A. S. B. xxxix, 1870, pt. 2, 



p. 224, pi. xii, fig. 1 ; Anders. P. Z. S. 1871, p. 196. 

 Tnmeresuius monticola, part, Anders. P. Z. 8. 1871, p. 194. 



Snout very short ; eye very small. Bostral as deep as broad ; 

 upper head-scales small, subimbricate, smooth ; supraocular large, 

 more than twice the size of the eye ; internasals separated from 

 each other by one io three scales, rarely in contact; 5 to 8 scales 

 on a transverse line between the supraoculars ; 3 or 4 rows of scales 

 between the eye and the labials ; 8 or 9 upper labials, second usually 

 forming the anterior border of the loreal pit; temporal scales smooth. 

 Scales feebly keeled, in some specimens almost smooth, in 21 to 23 

 rows. Ventrals 132-156 ; anal entire ; subcaudals 21-57 pairs. 

 Brown or yellowish above, with one or two dorsal series of large 

 squarish dark brown spots and a lateral series of smaller spots ; 



