1891.] W, L. Sclater — Notes on the Snakes in the Indian Museum. 239 



yellowish tlie outer edges of the ventrals dusky, tail with a median dusky 

 streak. 



This snake is quite different from the only other Indian species of 

 the genus, Z. nigromarginatus ; in fact it belongs to the other section of 

 the genus characterized by Giinther by the possession of three loreals 

 and named by him Zapyrus. 



It seems to most resemble Zaoccys fuscus from Borneo, but differs 

 from this snake in colouration and also in the number and position of 

 upper labials. 



Coluber helena, Daud., Boulenger, p. 331. 



The range of this snake extends somewhat beyond the limits impos- 

 ed by Boulenger; the Indian Museum possesses examples from the Pur- 

 neah district and Mutlah in Bengal and from Samagooting in Assam. 



Coluber reticularis, Cantor, Boulenger, p. 332. 



The range of this species too may be extended from Sikkim and 

 Assam southwards to Arakan and Pegu whence the Museum possesses 

 specimens. 



Coluber taeniurus, (Cope), Boulenger, p. 333. 



Coluber nuthalli, Theobald (Cat. Rept. As. Soe. Mus., p. 51) the type 

 of which is in the Indian Museum, is obviously a young specimen of G. 

 taeniurus and is not identical with Coluber helena ^a,s suggested by Bou- 

 lenger. 



Coluber radiatus, Schleg., Boulenger, p. 333. 



The Indian Museum possesses examples of this snake from Backer- 

 gunge in Lower Bengal (E. Taylor) and from Hong Kong, from neither 

 of which localities is this species recorded by Boulenger. 



Coluber prasinus, Bly., Boulenger, p. 334. 

 Coluber oxtcephalus, Boie, Boulenger, p. 335. 



There are in the Museum examples of both these snakes from Dar- 

 jeeling (Gammie) whence they are not recorded by Boulenger. 



Tropidonotus CHRYSARGua, Schleg., Boulenger, p. 345. 

 Tropidonotus nigrocinctus, Bly., Boulenger, p. 346. 



The distinction given by Boulenger in his key between these two 

 species I find to be by no means a constant one j several of the specimens 

 of Tro^. nigrocinctus in the Museum possess two anterior temporals ; the 



