316 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XV 11 . 



round the bite blackened in a minute or two, detached itself, and came 

 off in his mouth during suction. 



Dimensions. — Grows to 1^ feet. 



Colour. — The prevailing colour is brown, mottled darker to form an 

 irregular coarse variegation. A pale buff or yellowish horse-shoe mark 

 on the nape. A dark streak behind the eye. Beneath light-coloured 

 mottled with darker hues. 



Lachesis monticola — The Large-spotted Viper. 



Tdentification 



This is the only species that has no subocular shield, 

 and this character will serve to 



diagnose it. 



Jn2 



Supplementary characters : 

 Tnternasals. — A pair, separated 

 by from 1 to 3 small scales. Su- 

 praocular. — A single shield. — 

 Nasal. Not united with 1st 

 labial ; no minute scales inter- 

 calated between it and the 2nd 

 labial. Subocular absent; 2nd 

 labial furrowed in its upper half, 

 and forming the inner wall of 

 the lorealpit. Scales. — Anterior 

 Fir. 28.— LacheBis montirola (nafc. size), usually 23, (rarely 25) ; mid- 

 body 23, (rarely 21 or 25); posterior 19, (rarely 21 J. 



Distribution.— -The Himalayan region (from 2,000 to 8,000 feet) in- 

 cluding Hills of Assam, Burmth and Yunnan. 



Poism. — Stoliczka* mentions a cocly who was bitten by a small one 

 about 14£ inches in length. He made him suck vigorously, and gave 

 him brandy, and no ill effects were noticed. 

 Dimensions. — Grows to 3 fee*. 



Colour. — Light brown or buff, with large irregularly squarish patches 

 or spots of dark brown on the middle of the back, and a conrse mottling 

 of these two hues in the flanks. Crown dark brown with a buff 

 V bordered dark brown below. Belly yellowish, uniform in front, 

 obscurely spitted, or mottled behind. 



° Journal Asiatic Soc- Bengal, Vol. XXXIX„p. '224. 



