324 COLUBRIDJE. 



B. Posterior chin-shields separated from each other. 



a. Scales in 19 rows. 



a'. Two labials enter eye; veutrals 199-211 : [p. 325. 



subcaudals 82-119 Z. ventritnaculatus, 



b'. Two labials enter eye ; ventrals 214-255 , 



subcaudals 124-140 Z. ladacemis, p. 326. 



c'. A subocular separates the eye from the 

 sixth labial; ventrals 193-212; sub- 

 caudals 85-110 Z. karelinii, p. 326. 



b. Scales in 21 or 23 rows ; two labials enter eye. 



a'. 9 upper labials ; subcaudals more than 100. Z. yracilis, p. 327. 

 b'. 8 upper labials; subcaudals less than 100. Z. fasciolatus, p. 327. 



c. Scales in 23 to 31 rows ; eye separated from 



labials by a series of subocular s. 

 a'. Rostral as deep as broad or a little broader 



than deep Z. diadema, p. 328. 



V. Rostral much deeper than broad, wedged in 



far between the internasals Z. urenarius, p. 329. 



396. Zamenis korros. 



Coluber korros, ScMeg. Phys. Scrp. ii, p. 139 ; Cantor, J. A. S. B. 



xvi, 1847, p. 921. 

 Coryphodon korros, Dum. < Bibr. Erp. Gen. vii, p. 186; Jan, Icon. 



OpMd. 24, pi. iv, tig. 2. 

 Ptyas korros, Cope, Proc. Ac. Philad. 1800, p. 563 ; Giinth. Kept. 



B. I. p. 250 ; Theob. Cat. p. 169 ; Anders. An. Zool. Res. Yunnan, 



p. 816. 



Snout obtuse, slightly projecting ; eye large ; rostral a little 

 broader than long, visible from above ; suture between the inter- 

 nasals shorter than that between the praefrontals ; frontal as long 

 as its distance from the end of the snout or a little longer, and as 

 long as the parietals ; usually two or three loreals ; one large prae- 

 ocular, with a small subocular below ; two postoculars ; temporals 

 2+2; 8 upper labials, fourth and fifth entering the eye; 5 

 lower labials in contact with the anterior chin-shields, which are 

 shorter than the posterior; latter in contact anteriorly. Scales 

 smooth, or feebly keeled on the posterior part of the back in the 

 adult, in 15 rows. Ventrals 162-177; anal divided; subcaudals 

 129-145. Brownish or olive above, the scales on the posterior 

 part of the body and on the tail edged with black ; lower surface 

 uniform yellow ; young with transverse series of roundish pearl- 

 coloured spots, forming cross-bands. 



Total length 5 feet ; tail 2 feet. 



Hab. From the Sikhim Himalayas through Assam to Upper 

 Burma, Western Yunnan, Southern China and Siam, through 

 Arrakan and the Malay Peninsula to Sumatra and Java. 



397. Zamenis mncosns. 



Russell, Ind. Serp. i, pi. xxxiv, and ii, pi. xviii, fig. 2. 

 Coluber mucosus, Linn. S. N. i, p. 388. 

 Coluber dhumna, Cantor, P. Z. S. 1839, p. 51. 



