428 VIPEBIDJE. 



with one or more black spots, that on the second labial being con- 

 stant ; belly yellow, more or less profusely spotted or marbled 

 with black. 



Total length 31 inches ; tail 5. 



Hab. Khasi Hills. This species has recently been rediscovered 

 at Ichang, on the Yang-tse-Kiang. 



528. Trimeresurus mucrosquamatus. 



Trigonocephalus mucrosquamatus, Cantor, P. Z. S. 1839, p. 32. 

 Trimeresurus mucrosquamatus, Giinth. Rept. B. 1. p. 390 ; Swinhoc, 

 P. Z. S. 1870, p. 411, pi. xxxi ; Theob. Cat. p. 224. 



Rostral slightly broader than deep ; upper head-scales extremely 

 small, granular, smooth or obtusely keeled ; supraocular narrow ; 

 3 scales between the internasals, 14 or 15 on a line between the 

 supraoculars ; 4 or 5 minute postoculars and a subocular, which 

 is separated from the labials by two or three series of scales ; 

 10 or 11 upper labials, second forming the anterior border of the 

 loreal pit. Scales strongly keeled, in 25 or 27 rows. Ventrals 

 200-214(218); anal entire; subcaudals 76-92 pairs. Brownish 

 grey above, with a dorsal series of large blackish spots and a lateral 

 series of smaller ones ; a blackish streak from the eye to the angle 

 of the mouth ; lower parts brownish, spotted with white. 



Total length 3 feet 5 inches ; tail 8*6 inches. 



Hab. Naga Hills, Assam ; Formosa. The above description is 

 taken from specimens from the latter locality. 



529. Trimeresurus cantoris. 



Trigonocephalus cantori, Blyth, J. A. S. B. xv, 18G4, p. 377. 

 Trimereaurus viridis, var. cautori, Blyth, J. A. 8. B. xxix, 1800, 



p. 110. 

 Trinieresurus labialis, Steindachn. Numra. Rept. p. 8(5, pi. iii, figs. 1 



& 2 ; Theob. Cat. p. 221. 

 Trimeresurus cantoris, StoKczka,J. A. S. B. xxxix, 1870, pt. 2, p. 222, 



pi. xii, figs. 3 & 4 ; TJieob. 1. c. p. 222. 



Eostral as deep as broad ; upper head-scales very small, smooth, 

 almost granular ; supraocular shield distinct, narrow, sometimes 

 divided into two ; usually one or two scales between the inter- 

 nasals, 16 on a line between the supraoculars ; two small post- 

 oculars and a subocular, which is separated from the fourth and 

 following labials by two or three rows of scales ; 13 upper labials, 

 first confluent with nasal, second forming the anterior border of 

 the loreal pit, fourth largest; temporals small, feebly keeled. 

 Scales rather feebly keeled, in 27 to 31 rows. Ventrals 174-184 ; 

 anal entire ; subcaudals 55-76 pairs. Pale brown or dull green 

 above, with small dark spots ; a whitish streak along the outer 

 series of scales ; whitish or greenish beneath, uniform or with the 

 base of the ventrals dark ashy or blackish. 



Total length 4 feet ; tail 6-5 inches. 



Hab. Andaman and Nicobar Islands. 



