430 VIPERIDiE. 



Trimeresurus viridis, Lace}). Ann. Mus. iv, 1804, p. 209, pi. hi, 



fig. 2 ; Gray, Vat. 8n. p. 7 ; id. A. M. N. H. (2) xii, l6~y-), 



p. 391. 

 Trigonocephalus erythrurus, Cantor, P. Z. S. 1839, p. 31. 

 Trimesurus albolabris, Gray, Zool. Misc. p. 48. 

 Trigouocephaliis gTauiineu:^, part., Cantor, J. A. S. B, xvi, 1847, 



p. 1040. 

 Tiiine.surus elegaus, Gray, A. M. N. II. (2) xii, 1853, p. 391. 

 Buthrops viridis, Dum. i.y Bihr. Erp. Gen. vii, p. 1512. 

 Trimeresurus gramineus, G'dnth. Rept. B. I. p. 385 ; Stoliczka, J. A. 



S. B. xxxix, 1870, pt. 2, p. 216; Anders. P. Z. S. 1871, p. 194; 



Theob. Cat. p. 219 ; Anders. Ann. Zool. lies. Ywman, p. 828. 

 Trimeresurus erythrurus, G'dnth. I. c. p. 386 ; Stoliczka, I. c. p. 217 ; 



Fayrer, Thanatoph. pi. xiv ; Theob. Cat. p. 220. 

 Trimeresurus mutabilis, StoUczkcc, I. c. p. 219, pi. xii, fig. 5; Theob, 



I. c. p. 223. 



Rostral as deep as broad or broader than deep ; upper head- 

 scales small, smooth, imbricate ; supraocular shield naiTow, rarely 

 broken up ; internasals in contact or separated by one or two 

 scales ; 8 to 18 scales on a line between the supraoculars ; usually 

 one or two, rarely three, series of scales between the subocular and 

 the labials ; 9 to 12 upper labials, second usually forming the an- 

 terior border of the loreal pit, third largest ; temporal scales smooth. 

 Scales more or less distinctly keeled, in 21 (rarely 19 or 23) rows. 

 Ventrals 145-175 ; anal entire ; subcaudals 53-75. Upper parts 

 usually bright green, rarely yellowish, greyish, or purplish brown, 

 with or without black, brown, or reddish spots ; usually a light, 

 white, yellow, or red streak along the outer row of scales ; end 

 of tail frequently yellow or red ; lower parts green, yellow, or 

 whitish. 



Total length 2| feet ; tail 5-5 inches. 



Hah. Southern China, Sikhim, Bengal, Assam, Burma, Cochin- 

 China, Siam, Andamans and Xicobars, Malay Peninsula and 

 Archipelago. 



532. Trimeresurus anamallensis. 



? Trigonocephalus (Cophias) malabaricus, Jerdoii, J, A. 8. B. xxii, 



1854, p. 523. 

 ? Trigonocephalus (Cophias) wardii, Jerdon, I. c. p. 524. 

 Trimeresurus anamallensis, G'unth. Rept. B. I. p. 387, pi. xxiv, fig. C ; 



Fayrer, Thanatoph. pi. xiv ; Theob. Cat. p. 220. 



Rostral slightly broader than deep ; upper head-scales small, 

 smooth or obtusely keeled, imbricate ; supraocular shield rather 

 large, broken up into two or three ; internasals in contact or se- 

 parated by one scale ; 7 to 9 scales on a line between the supra- 

 oculars ; two or three small postoculars and a subocular ; the latter 

 shield separated from the fourth and succeeding labials by tvvo 

 rows (rarely one) of scales ; 9 or 10 upper labials, second forming 

 the anterior border of the loi-eal pit, third largest ; temporal scales 

 obtusely keeled. Scales feebly keeled, in 21 (rarely 19) rows. 

 Ventrals 138-158 ; anal entire ; subcaudals 44-58 pairs. Green, 



