548 TIPBKIDiE. 



16. Lachesis monticola. 



Farias maculata, Graxj, Ann. 8; Mag. N. H. (2) xii. 1853, p. 392 



(■nee Gray, 1842). 

 Trimeresiu-us monticola, Qunth. Rept. Brit. Ind. p. 388, pi. xxiv 



fig. B (1864) ; Stcliezka, Journ. As. Soc. Beng. xl. 1871, p. 445 



Fayrer, Tlianatoph. Ind. pi. xv. (1874) ; Theob. Cat. Rept. Brit. 



Ind. p. 220 (1876) ; Anders. An. Zool. Res. Yunnan, p. 832, pi. Ixxvi, 



figs. 4 & 5 (1879) ; Boulenq. Faun. Ind., Rept. p. 426 (1890) 



Gtinth. in Pratt, Snows of Tibet, p. 241 (1892). 

 convictus, Stoliczka, Journ. As. Sue. Beng. xxxix. 1870, p. 224, 



pi. xii. fig. 1 ; Anders. Proc. Zool. Soc. 1871, p. 196. 

 monticola, part., Anders. I. u. p. 194. 



Snout very short ; eye very small. Eostral as deep as broad, or 

 a little ' broader than deep ; nasal divided or semidivided ; upper 

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

 nasals separated from each other by one to three scales, rarely 

 in contact ; 5 to 8 scales in a transverse line between the supra/- 

 oculars ; 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 25 rows (rarely 27). 

 Ventrak 132-158 ; 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 ; head dark 

 brown above, pale brown or yellowish on the sides, with a dark 

 brown temporal streak ; lower parts whitish, spotted or powdered 

 with brown, the brown spots sometimes confluent into two stripes. 



Total length 740 millim. ; tail 115. 



Tibet, Himalayas (2000-8000 feet), hills of Assam, Burma, and 

 the Malay Peninsula ; Pinang, Singapore, Sumatra. 



a-h. S (Sc. 25 ; V. 161, Kia-tiang-fu, 1070 A. E. Pratt, Esq. [C.]. 



158; U. 46, 40). ft, Prov. Sze- 



Chuen. 



e. S (Sc. 23; V. 140; Kepaul. B. H. Hodgson, ) -3 



C.43). Esq. [P.]. [^ 



d. Yg. (Sc. 23; V. 147; SikMm. Sir J. Hooker fP.]. (^ 



e. 2 (Sc. 25 ; V. 162 ; Darjeeling. E. Blyth, Esq. [P.]. 

 0. 38). 



f-l. ^(Sc. 23; V. 141; Darjeeling. T. C. Jerdon, Esq. [P.]. 



C. 44), 2 (Sc. 23; V. 



144; C. 36), & yg. (Sc. 



21, 23, 24, 22 ; V. 146, 



146, 137, 141 ; C. 40, 



49, 36, 45). 

 m, n-p. S (Sc. 23, 23 ; Darjeeling. W. T. Blanford, Esq. 



¥.141,148:0.33,36), [P.]. 



hgr. ? (Sc. 23; V. 



148 ; 0. 35), & yg. (Sc. 



23; V. 149; C. 38). 

 q, r. 5 (Sc. 25 ; V. 151 ; Himalayas. Col. Beddome [C.l. 



C. 38) & yg. (Sc. 21 ; 



V. 143; C. 49). 



