554 VIPERID®. 
series of scales; 11 to 13 upper labials, the fourth and succeeding 
small, the first usually fused with the nasal, the second (usually) 
forming the anterior border of the loreal pit; temporal scales 
keeled. Scales strongly keeled, in 25 or 27 rows. Ventrals 160- 
-182; anal entire; subcaudals 55-76 pairs. Tail slightly prehensile, . 
Dark purplish brown above, uniform or variegated with pale green ; 
flanks usually pale green or spotted with pale green, or with a 
series of pale spots on the outer series of scales; olive or greenish 
white below, uniform or spotted with black; some specimens 
uniform green. 
Total length 980 millim.; tail 150. 
Himalayas, Bengal, Assam, Burma, Malay Peninsula, Andamans, 
Nicobars, Pinang, Sumatra. 
A. Uniform purplish brown to blackish above. 
a. 2 (Se. 27; V. 163; C.59). Singapore. Gen. Hardwicke [P.]. 
(Type.) 
b. 3 (Se. 27; V. 162; C.75). Singapore. Dr. Teanys LE} 
e. g (Sc. 25; V. 160; 0.74). Singapore. Dr. Collingwood [P.]}. 
d, 2 (Se. 27; V. 174; C. 57). Pinang. Dr, Cantor, 
e. ¢ (Se. 25; V. 160; C. 76). India, J. Inski ip, , Esq. [P.]. 
- (Type of 7. cartnatus.) 
B. Dark purplish brown or blackish, variegated with pale green. 
a. 2 (Sc. 27; V. 178; C. 63). Pinang. Dr. Cantor. 
b. 2 (Sc. 25; V. 170; C. 58). Yumeekee, Dr. J. Anderson [P.]. 
Mergui. 
C. Uniform green above. 
a. 2 (Se.25; V. 168; C. 61). Sikkim. Sir J. Hooker ee 
pit 
wi of 7. bico 
b-c. 9 (Se. 25; V.162; C.59) Rangoon, neal 
& ye. (Sc. 25; ¥.. 163 ; 
66, 
d. Hgr. (Sc. 25; ‘V. 160; Pegu. 1 oi Esq: 
OC, 56). |. 
e. 2 (Sc.25; V.164; C. 52). Toungoo. . ~— E. W. Oates, Esq.[P.]. 
25. Lachesis gramineus. 
Russell, Ind. Serp. i. pl. ix. (1796) & ii. pl. xx. ge 
Coluber gramineus, Shaw, Zool. iii. P; 420 (1802), 
Vipera viridis, Daud. Rept. vi. p. 112 (1803). 
Trimeresurus viridis, Lacép. Ann. du Mus. iv, 1804, p. 209, pl. vi. 
5 belt Cat, p. 7 (1819), and Ann. § Mag. N. H, (2) xii. 
] 
Cophias viridis, Merr. Tent. Pith 155 (1820). 
Trigonocephalus viridis, Sc Phys. ptm ii. p. 344, pl. xix. 
figs. 12 & 13. 
—— erythrurus, Cantor, Proc. Zool. Soc, 1839, p. 31, 
