548 VIPERID.E. 
16. Lachesis monticola. 
Parias maculata, Gray, Ann. § Mag. N. H. (2) xii. 1853, p. 392 
(nec Gray, 1842). 
Trimeresurus monticola, Giinth. Rept. Brit. Ind. p. 888, pl. xxiv. 
fig. B (1864) ; Stoliczka, Journ, As. Soc. Beng. xl. 1871, p. 445; 
Fayrer, Thanatoph. Ind. pl. xv. (1874); Theob. Cat. Rept. Brit. 
Ind. p- 220 (1876); Anders. An. Zool. Res. Yunnan, p. 832, pl. Ixxvi. 
figs. 4 & 5 (1879); Bouleng. Faun. Ind., Rept. p. 426 (1890) ; 
Giinth, in Pratt, Snows of Tibet, p. 241 (1892). 
—— convictus, Stoliezka, Journ, As. Soc. Beng. xxxix. 1870, p. 224, 
pl. xii. fig. 1; Anders. Proc. Zool. Soc. 1871, p. 196. 
— monticola, part., Anders, 1. c, p. 194. 
Snout very short; eye very small, Rostral 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). 
Ventrals 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- 3000 feet), hills of Assam, Burma, and 
the Malay Peninsula; Pinang, Singapore, Sumatra. 
a-b. § (Se. 25; V.151, Kia-tiang-fu, 1070 A. E. Pratt, Esq. [C.]. 
158; C, 46, 40). ft., Prov. Sze- 
Chuen. 
« 6 og 23; V. 140; Nepaul. B.-A; Pe 3 
C. 4 
d. Ye, KS, 23; V. 147; Sikkim, Sir 7 iaboie(P . 
«2 *(S, 95; V. 159; Darjecling. E. Blyth, Esq. [P.]. _ 
38). 
f-l. 3 (Sc, 23; V. 141; Darjeeling. T. C. Jerdon, Esq. [P.]. 
145, 137, 141; ©. 40, 
m 36, 45). 
3 (Se. 28, 23; Darjeeling. W. T. Blanford, Esq. 
my. 41, 148; ©. 33, 36), [P.]. 
hgr. 9 (Se. rae 
148; ©. 35), & yg. (Se. 
23; V. 149; C. wh). 
%F 9 (Sc. 2b ; V.151; Himalayas. Col. Beddome [C.}. 
C. 88) & yg. (Se. 21; 
V. 143; © 49). 
