117 



Head narrow, elongate ; body rather slender. 

 One postocular. Ventral shields distinct, only 

 the interior being twice as broad as the adjoin- 

 ing series, 398 in number. h. strktkoUis. 



Head rather narrow and produced ; body 

 somewhat elongate. Two postoculars. Ventral 

 shields twice as broad as the adjoining scales, 

 252-260 in number, scales with a central 

 tubercle. Tlie first upper temporal shield 

 much longer than high. ^^ omata. 



Head rather thick and short, body of mode- 

 rate length. Two postoculars. Ventral shields 

 nearly twice as broad as the adjoining scales, 

 253-258 in number. The first upper temporal 

 shield is not much longer than high ; 35 or 37 

 series of scales round the neck. ^^ eiUotu. 



Head and body of moderate width and length. 

 Two postoculars ; nasal shields longer than 

 broad. Ventrals more than twice as broad as 

 the scales, 258 in number. The first upper 

 temporal shield longer than high ; 28 series of 

 scales round the neck. „ pachycercus. 



Head of moderate size and width ; body of 

 moderate length. Two postoculars; nasal 

 shields as broad posteriorly as they are long ; 

 anterior ventral shields broad. „ viperina. 



Head rather short ; body moderately stout. 

 Two postoculars. Ventrals distinct, but not 

 twice as broad as the adjoining series. Back 

 and sides with large round spots, each with a 

 lighter centre. ,,,;;„^«, 



