67 



OLmOBO-^ , Boie. 



Nostril between two partly confluent Hcasals. One pre- 

 ocular, one or two postoculars. Rostral produced backwards. 

 Scales 15-17. Length 10-20 inches. No imlatine teeth. 



O. SUBGRISEUS, D. and B, Plate XI, fig. 1. 



Scales 15. Ventrals 180-202, subc. 48-54. Labials 7 

 (3 and 4).* Brown with numerous narrow dark fasciolated 

 cross lines, crossed by a vertebral and dorsal whitish 

 stripe ; belly white ; head-markings. Grows to 18 inches, 

 tail one-seventh. 



South of India, Anamullies ; rather common. 



0. SPiLONOTUS, Gthr. 



Scales 15. Ventrals 155-162, subc. 50. Labials 7 (3 k> 4). 

 Vertebral series of about 17 brown 8-shaped spots, with 

 alternate thin cross lines ; belly white ; head -markings. 

 South of India. 



O. ELLIOTI, GtllT. 



Scales 15. Ventrals 156-169, subc. 30-45. Labials 7 (3 

 and 4). Vertebral series of about 37 large rhombic black 

 spots giving off cross streaks, or of dark fasciolated cross- 

 streaks ; belly white ; head-markings. Allied to 0. suh- 

 griseus. 



South of India, 



0. suBPUNCTATUS,!). and B. 



8 labials (4, 5 and 6). Grey with vertebral series of 

 round black white-edged spots; belly white with lateral 

 black dots ; head-markings. 

 Western Coast. 



0. SPINIPUNCTATUS, Jan. 



Scales 17. Ventrals 193, subc. 62. Labials 9 (4, 5 and 6). 

 Similar to the preceding, but no ventral dots. 

 A solitary museum specimen. 



* (3 and 4) means that the 3rd and 4th labials enter the orbit. 



