324 COLUBRID^. 



B. Posterior cli'm-shields separated from each other. 



a. Scales in 19 rows. 



a'. Two labials enter eye; veutrals 193-211 ; [p. 32o. 



subcaudals 82-119 Z. ventriiuaculatus, 



b' . Two labials enter eye ; veutrals 214-255 ; 



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



c'. A subocular separates the eye from the 

 sixth labial ; veutrals 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. (/racilis, i). 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, 

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



than deep Z. diadema, p. 328. 



b'. Rostral much deeper than broad, wedged in 



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



396. Zamenis korros. 



Coluber korros, Scldeg. Phys. Scrp. ii, p. 139; Cantor, J. A, S. L\ 



xvi, 1847, p. 921. 

 CorA'phodon korros, Dum. ^- Bihr. Erp. Gen. vii, p. 186; Jan, Icon. 



Ophid. 24, pi. iv, fig. 2. 

 Ptyas korros, Cope, Proc. Ac. Pliilad. 1800, p. 563 ; Giinth. Rept. 



B. I. p. 250 ; Theob. Cat. p. 109 ; Anders. An. Zool. Res, Yunnan, 



p. 810. 



Suout obtuse, slightly projectiug ; eye large ; rostral a little 

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

 nasals shorter than that between the prsefrontals ; 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 i)rse- 

 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. Veutrals 162-177; anal divided; subcaudals 

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

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

 uniform yellow ; youug with transverse series of roundish pearl- 

 coloured spots, forming cross-bands. 



Total length 5 feet ; tail 2 feet. 



Ilab. IVom the Sikhim Himalayas through Assam to U])per 

 Burma, AVestern Yunnan, Southern China and Siam, through 

 Arraka)! and the Malay Peninsula to Sumatra and Java. 



397. Zamenis mucosus. 



Russell, Ind. Scrp. 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. 



