554 TIPERID^. 



series of scales ; 11 to 13 upper labials, the fourtli 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, Andamana, 

 Nioobars, Pinang, Sumatra. 



A. Uniform purplish brown to blackish above. 



a. 2 (Sc. 27 ; V. 163 ; C. 69). Singapore. Gen. Hardwicke [P.]. 



(Type.) 



b. c? (Sc. 27 ; V. 162 ; C. 75). Singapore. Dr. Dennys [P.]. 



e. cf fSc. 2.5; V. 160; 0.74). Singapore. Dr. Collingwood [P.]. 



d. ? (Sc. 27 ; V. 174; 0. 57). Piuang. Dr. Cantor. 



e. cJ (Sc. 25; V. 160 ; C. 76). India. J. Inskip, Esq. [P.]. 



(Type of T. carinatus.) 



B. Dark purplish brown or blackish, variegated with pale green. 



a. 2 (Sc. 27; V. 178; 0. 63). Pinang. Dr. Cantor. 



b. $ (Sc. 25; V. 170; C. 68). Yumeekee, Dr. J. Anderson [P.]. 



Mergui. 



C. Uniform green above. 



a. $ (Sc. 25 ; V. 168 ; 0. 61). Sikkim. Sir J. Hooker [P.]. 



(Type of T. hicolor.) 



6-c. 2 (Sc.25; V.162; 0. 59) Eangoon. W. Theobald, Esq. 



& yg. (Sc. 25 ; V. 163 ; [0.]. 



0. 66.) 



d. Hgr. (Sc. 25; V. 160; Pegu. W. Theobald, Esq. 

 0. 50). [0.]. 



e. 2 (Sc.25; V.164; C. 52). Toungoo. B.W. Gates, Esq. [P.]. 



25. Lachesis gramineus. 



MusseU, Ind. Serp. i. pi. ix. (1796) & ii. pi. xx. (1801). 



Coluber gramineus, Shaio, Zool. iii. p. 420 (1802). 



Vipera viridis, Daud. Rept. vi. p. 112 (1808). 



Trimeresurus viridis, Lacip. Ann. du Mus. iv. 1804, p. 209, pi. Ivi. 



fig. 2; Gray, Cat. p. 7 (1849), and Ann. 8/- Mag. N. S. (2) xii. 



1853, p. 391. 

 Cophias viridis, Merr. Tent. p. 155 (1820). 

 Trigonocephalus viridis, Schleg. Phys. Serp. ii. p. 344, pi. xix. 



figs. 12 & 13. 

 erythrurus, Cantor, Proc. Zool. Soc. 1839, p. 31. 



