11. LACHESIS. 555 
Trimesurus albolabris, Gray, Zool. Miscell. p. 48 (1842), and Cat. 
p. 8. 
Baer Pe sr gramineus, part., Cantor, Cat. Mal. Rept. p. 119 
(1847). 
Trimesurus elegans, Gray, Ann. § Mag. N. H. (2) xii. 1853, p. 391. 
Bothrops viridis, Dum. & Bibr. vii. p. 1512 (1854). 
Trimeresurus gramineus, Giinth. Rept. Brit. Oo p- 385 (1864) ; 
Stoliceka, Journ. As. Soc. Beng. xxxix. 1870, p. 216; Anders. 
Proc. Zool. Soe. 1871, p. 194; Theob. Cat. Rept. "Rr it. Ind. p- 219 
(1876); Anders. An. Zool. Res. Yunnan, p. 828 (1879); Boettg. 
Ber. Senck. Ges. 1887, p. 50; Bouleng. Faun. Ind., Rept. p. 429 
(1890); W. Sclater, Journ. ” As. Soc. Beng. 1x. 1891, p- 248; 
Boetty. Ber. Senck. Ges. 1894, p. 1365. 
erythrurus, Giinth. 1. ¢. p. 386 ; Stoliczka, 1. ce. p. 217; Fayrer, 
Thanatoph. Ind. pl. xiv. (1874) ; Theob, l. c. p. 220; "F. Miill. 
Verh. Nat. Ges. Basel, viii. 1887, p. 280. 
mutabilis, Stolicaka, lc. p. 219, pl. xii. fig. 5; Theob. 7. c. p. 223. 
Snout with distinct canthus; eye small or rather small. Rostral 
as deep as broad or a little broader than deep ; nasal usually entire ; 
upper head-seales small, smooth, imbricate or subimbricate, 8 to 13 
in a transverse series between the supraoculars, which are narrow 
(rarely divided); internasals in contact or separated by one or two 
scales; two or three postoculars and a subocular; Jatter sometimes 
in contact with the third labial ; usually one or two, rarely three, 
series of scales between the subocular and the labials ; temporal 
scales smooth ; 8 to 12 upper labials, second forming the anterior 
border of the loreal pit, third largest. Scales nearly smooth or 
more or less distinctly keeled, in 21 (rarely 19 or 23) rows. 
Ventrals 145-175; anal entire ; subcaudals 53-75. Tail more or 
less distinctly prehensile, Bright green above, rarely olive or 
yellowish, with or without ill-defined blackish cross-bands ; usually 
a light, white or yellow streak along the outer row of scales ; end 
of tail often yellow or red; lower parts green, yellow, or whitish. 
Total length 870 millim.; tail 150. 
South-eastern Asia. 
ab. Hgr. go (V. 161; Ladak. — Strachey, Esq. [P.]. 
5 a a Q (Vv. 162: 
49). 
C. a (V. 167; C. 76). Bimtal, 4400 ft. Dr. Cantor, 
d-e. Q (V. 164; C. 58) Darjeeling. W. T. Blanford, Esq. 
& her. 2 (V. 159 ; (eh 
C. 61). 
f-h, t. 3 (V. 165, 164; Darjeeling. T. C. Jerdon, Esq. [P.]. 
C. 2, 64), Q (V. 161; 
C. 58), & yg. (V. 147; 
C. 65). 
k. & (V. 157; C. 57). Sikkim. Sir J. Hooker [P.}. 
l. Yg. (V. 168; C.61). = Sikkim. Sir J. Hooker [P.]. 
(Type of 7. elegans.) 
m—n. ae (V. 158, 166; Himalayas. Col. Beddome [C.]. 
C. 62, 59). 
0. Her. Q (Se. 19; V. 149; Khasi hills. Dr. Griffith. 
C. 56). 
