120 



T. CABIN ATUS, Gray. 



Scales 23-25. Ventrals 161-167, subc. 45-68. Head scales 

 small, strongly keeled ; supranasals not contiguous. Grass- 

 oreen, paler below, with or without a white lateral stripe, 

 tail often reddish, belly often white. Grows to about 3 feet 

 long, tail one-fifth or less. 

 Burma, Assam. 



I consider that the above three species are merely varie- 

 ties of a species. T. viridis, the green tree-viper. Their 

 colour is delicate and variable ; the keeled scales, the reddish 

 tail, and the side stripe may be present or absent in either 

 of these varieties. 



T. MUTABILIS, Stolicska. 



Scales 21. Ventrals 156-167, subc. 48-62. Reddish brown, 

 with numerous greenish white cross-bands and two longitu- 

 dinal lateral stripes of the same colour. 

 Andamans, Nicobars. 



T. CANTORIS, Blyth. 



Scales 29. "Ventrals 174-184, subc. 55-76. Green, with 

 alternating fquincuncial) series of dark spots ; often a lateral 

 white line, greenish or white below ; tail prehensile, com- 

 pressed. 



Andamans, Nicobars. 



T. PURPUREUS, Oray. 



Scales 25-27. Ventrals 162-171, subc. 65-70. Dull reddish 

 brown, pale green on the sides, yellow lateral stripe, ven- 

 trals and subcaudals marked with brown. 



Straits. 



T. ANAMALLENSIS, Gthv. 



Scales 21, more or less keeled. Ventrals 148-158, subc. 

 49-55. Supranasals generally separated. Yellowish green, 

 with vertebral series of rhombic black spots variegated with 

 yellow. Head marbled with black, post-orbital streak. 

 Anamullays, Wynaad. 



