( 146 ) 



Scales in 15 roius. 



0. subgriseus, D. et B. 



Loreal distinct (exceptionally united with posterior frontal). 

 One prse and two postoculars. 7 upper labials, the third and 

 fourth entering the orbit. 



Head with symmetrical brown, black-edged markings. Back 

 with numerous narrow irregular reticulated cross streaks, inter- 

 rupted by three more or less distinct narrow whitish lines, the 

 middle one marking the vertebral line. Belly white, occasionally 

 each second or third scute marked with a pair of marginal dots. 



Grows to 19 inches. 



Inhabits the Anamally hills (Beddome), Dumerkunda, Bengal 

 (Anderson). 



O. spilonotus, Giinther. 



Loreal distinct. One prse and two postoculars. 7 upper 

 labials, the third and fourth entering the orbit. Head with the 

 usual symmetrical marks. An angular band across the forehead 

 descending obliquely through the eye, a second on the crown, des- 

 cending to the gape, separated by a yellow enterspace from a 

 third nuchal band, as large as the head and covering the extre- 

 mity of the occipitals. Back with 17 large 8-shaped black-edged 

 brown spots. These spots are distant from each other and with 

 some intervening black transverse stripes. Lower parts white. 



Grows to 15 inches. 



Inhabits Madras. 



O. Elliotti, Gunther. 



Loreal distinct. One prse and two postoculars. 7 upper 

 labials, the third and fourth entering the orbit. Head with mark- 

 ings very similar to the last. Second band confluent with nuchal 

 spot. Back ornamented with about 37 large rhombic black 

 spots, each of which gives off a descending process on either side. 

 Lower parts white. 



Inhabits Madras. 



