214 



VIPEEID^. 



about among dead leaves and is very sluggish. The Jalor Malays 

 call it Ular Icapak daun, or " leaf axe-snake." It feeds on frogs 

 and mammals. The species occurs also on the island of Junk 

 Ceylon or Selanga, off the west coast of the Malay Peninsula, 

 south of the isthmus of Kra. 



Genus LACHESIS. 

 Daudin, Hist. Kept, v, p. 349 (1803). 



Pupil vertical. Upper surface of head covered with scales or 

 small shields. Body cylindrical or compressed ; scales smooth or 



Fig. 66. — Head of Lachesis monticola. 



keeled, with or without apical pits. Tail moderate or short ; sub- 

 caudals in two rows (or single). 



South-Eastern Asia, Central and South America. 



Six species in the Malay Peninsula. 



