312 



Records of the Indian Museum. 



[Vol. IX, 



Major F. Wall, I.M.S., Lieut.-Col. A. R. S. Anderson, I.M.S., and 

 H. E. Lord Carmichael, Governor of Bengal. 



Key to the Species. 



I. Dorsal keeled tubercles regularly arranged in 



about 12 longitudinal rows. 



A. Dorsal tubercles half as large as eye ; both 



femoral and praeanal pores in the male ; 

 (subcaudal plates transverse) ... 



B. Dorsal tubercles much less than half as large 



as eye ; only praeanal pores in the male. 



1. About 20 ventral scales across mid-belly ; 



subcaudal plates enlarged. 



a. Subcaudal plates much longer than wide, 



entire 



b. Subcaudal plates as wide as long, often 



divided 



2. About 30 ventral scales across mid-belly ; 



no enlarged subcaudal plates 



II. Dorsal tubercles, if present, scattered or 



arranged in over 12 irregular rows. 



A. Tail flattened and expanded at base 



B. Tail cylindrical or subcylindrical. 



I. No enlarged transverse subcaudal plates. 

 a. Dorsal surface covered with minute 

 rounded tubercles among which are 

 scattered a comparatively small number 

 of larger ones ; colouration inconspicu- 

 ous ; male pores present, 

 i. Back almost smooth ; larger tubercles 

 feebly developed 



ii. Larger tubercles prominent and con- 

 spicuous under a hand lens, 

 a. Male with both femoral and praeanal 

 pores 



/3. Male without femoral pores. 



a. Praeanal pores of male in a 



longitudinal groove 



b. No pubic groove, 

 i. No lateral fold 



ii. A slight fold separating ventral 

 from lateral region on each side 



b. Dorsal surface covered with small round- 



ed tubercles with muoh larger and more 

 prominent ones arranged in numerous 

 rows, dark with small pale spots ; (no 

 femoral pores in male), 

 i. A double white line forming a nuchal 

 collar 



ii. No white lines on the neck 



c. Dorsal scales never prominent ; dark, 



pale-edged spots or stripes always con- 

 spicuous on dorsal surface ; no male 

 pores. 



G. 77iontii(}n-salso)'U)n. 



G. scaber. 



[G. brevipes.] 

 G. kachJieiisis. 



G. stoliczkai. 



G. laivderaiiiis (W. 



Himalayas). 



G. giibernatoris ( Dar- 

 jiling district, below 



4000 ft.) 



G. riibidns (Andaman 

 Is.) 



G. himalavicus (Darji- 

 ling district, 5000ft.) 



G. kliasiensis (N. Bur- 

 ma ; Assam). 



G. oldhamii (Tenas- 



serim). 

 G. triedrus (Ceylon). 



