( 169 ) 



fourth and fifth entering the orbit. Anal bifid. Scales in 17 

 rows (on neck in 19). The vertebral series rather enlarged. A 

 pair of apical grooves. Scales on the back usually keeled in 7 

 rows. Keels often faint or absent. Colour light brownish 

 olive. The scales with dusky margins, more deeply edged pos- 

 teriorly, producing a reticulated appearance, on the hind part of 

 body and tail. Shields of the head black margined. 



Grows to 91 inches. (Tail 25) Blanford. 



Inhabits Peninsular India and Ceylon, Arakan, Pegu and 

 Tenasserim, Upper Barmah, Yunan, the Andamans, and the 

 Malayan Archipelago. 



P. korros, Rein. 



Very like mucosus, but scales smooth in 15 rows. Vertebrals 

 not enlarged. A pair of apical grooves. Scales faintly keeled 

 posteriorly. Loreals two, one behind the other. Two prseoculars, 

 the lower small. Two postoculars. 8 upper labials, the fourth 

 and fifth entering the orbit. Colouration as in the last. 



Grows to 86 inches. (Tail 28). Another specimen 70 inches. 

 (Tail 25.) 



Inhabits Sikkim, Assam, Arakan, Pegu and Tenasserim, the 

 Malayan Archipelago, and Southern China. 



mucosas and korros are closely allied, so that it is not some- 

 times easy to decide to which a specimen belongs, korros how- 

 ever seems to have a more restricted range to the westward. 



Zamenis, Wagler. 

 Form elongate. Head distinct from neck, flat. Eye moderate 

 with round pupU. Nostril between two nasals. The shields of 

 the head exhibit a tendency to sub-division. Loreal one. Gener- 

 ally two, prse and two postoculars. Eye sometimes in contact 

 with detached pieces of the upper labials. Scales smooth or 

 faintly keeled. Ventrals with a very indistinct lateral keel. 



%. ventrimaculatus. Gray. 



Coluber diadema, Blyth (not Schl). 

 Oonyosoma dorsale Anderson. P. Z. S., 1872, p. 895. 

 Prsefrontals nearly as large as postfrontals. Occipitals trun- 

 cated behind, with a small semicircular shield following. Loreal 



