10 Col. R. H. Beddome on the 



of the adjoining series, from 130 to 148, probably without 

 reference to sex, or at least not more in the female than in the 

 male (one with 5 subeaudals having Vd'6 ; one with 6 having 

 138 ; one with 9 having 143) ; subeaudals 5 to 9 pairs ; very 

 faint traces of keels on some of the terminal caudal scales ; 

 scales in 19 rows round the middle of the body. Length of 

 large adult 20 inches, with a girth of 3 inches. Back a 

 metallic bluish brown, the lateral scales and ventrals brown 

 with a broad yellowish margin. 

 Hab. Ceylon, Central Provinces. 



There are only 19 rows of scales round the middle of the 

 body in all the specimens in the British Museum. Schlegel 

 and Giinther have described it with 21. 



SiLYBUEA. 

 (Siluboiira, Gray ; Silyhura, Peters.) 



Caudal disk flat, as if severed by a knife, or convex and ill- 

 defined ; the scales on the upperside generally furnished 

 with very prominent keels, rarely smooth or nearly so, but 

 faint keels are nearly always visible ] terminal scute a 

 horny horizontal scale, which is generally bispinous with 

 the points side by side, more rarely square. Head more 

 or less conical ; nasal shields forming a suture behind the 

 rostral, or more rarely separated by that shield ; no supra- 

 orbital ; no mental groove. Eye small or moderate, lying in 

 the front part of the ocular shield; the first pair of lower 

 labials generally form a suture behind the median shield, fol- 

 lowed immediately by the first ventral, or in some cases a 

 pair of chin-shields intervene between the lower labials and 

 the first ventral. Scales in 19, 17, or 15 rows. 



Hah. S. India and Ceylon. 



Synopsis of Species. 

 Scales in 19 rows. 



Caudal disk flat, snout pointed. Brovghami. 



Caudal disk convex. 



Not ocellated ; ventrals 206-214 grancUs. 



Ocellated ; ventrals 164-185 nigra. 



Scales in 17 rows. 

 Caudal disk flat. 



Snout pointed dindigalcnsis. 



Snout obtuse. 



Witli red markings. 



Two broad red lines ruhrol'meata. 



Large red blotches ruhromacuktta. 



Without red markings nilgherriensis. 



Caudal disk convex. 



Snout pointed. 



Ocellated. 



Ventrals 214 in males to 233 in females Oihraceu. 



