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Colour yellowish grey, dark spotted. Sides and belly white, 

 colours distinctly separated. 



Inhabits Pegu (Rangun). 



I separate this from the next which has not yet been record- 

 ed from India, as in Gray's description (Viperine Snakes, p. 77) 

 he describes the occipitals as small. Giinther does not mention 

 them or the loreal either, and there is also the difference in the 

 upper labial which enters the orbit. Still the two are closely 

 allied. My type was a young one of 1075 inches. (Tail 1'25.) 



F. unicolor. Gray. 



Hemiodontus chalyhceus Jan. Canest. Arch, Zool., Ill, 

 p. 264. 

 Scales in 25, 27, or rarely in 29 rows. Anterior frontal much 

 longer than broad, rather smaller than a posterior frontal. Five 

 laro-e upper labials, the third entering the orbit. One prseocular. 

 Two postoculars. Colour above uniform dark ash. Beneath 

 whitish, which involves the three outer rows of scales. 

 Grows to 25 inches. (Tail 3 inches.) 

 Inhabits Pinang. 



Hypsirhina, Wagler. 



Habit moderate, with rather depressed head, and tail com- 

 pressed at the root in males. A single praefrontal. Nostril in a 

 single shield divided externally by a groove. Eye small, with 

 round pupil. Scales smooth in 19 to 23 rows. 



H. plumbea, Boie, 



H. Hardwickii, Gray. 

 Head distinct from neck. Habit stout. Praefrontal as large 

 as a postfrontal. Loreal higher than long. One prseocular. Two 

 postoculars. 8 upper labials, the eye over the fourth, the fifth 

 excluded from the orbit (or nearly so). Colour brown with a well 

 defined dark edged yellow stripe. Sometimes a row of black 

 dorsal spots. Belly pale grey with a central dark cateniform 

 stripe, formed by a dark dot in the middle of each ventral. A 

 narrow dark line along the ends of the ventrals and another 

 down the suture of the subcaudals. 



