REPTILES AND BATRACHIAN3 FROM PENINSULAR SIAM. 159 



A very variable snake in colouration. Not one of the specimens 

 obtained was exact Ij' like the others. 



ol. Th(ii'ii)(iX()Tls tuianguugercs Boie. 



Khao Wang Hip (lower camp), Nakon Sitamarat. Klong Bang 

 Lai, Patiyii. 



This snake, common in the Peninsula, has not been found north 

 of I'atiyu. 



52. Tliol'IDONdTL'S XIGHOCINCTIS Blytli. 



GUntlier. Rppt. Brit, liul., \\ 2(!;i ( 1804 ) ; BIgr. Fauna Brit. Ind. 

 Rept., p. 34G (1890) ; idem, C.it Sn. Brit. Mus., I, p. 255 (18113); 

 Sraitii and Klcss, .Joiun.Nat. Hist. Soe. Siam, I, p. 244 (1915). 



Klong Bang Lai, I'atiyii, 1 half-grown specimen. 



Colour (inspirits). Above, olive-green anteriorly, brownish- 

 green posteriorly, with narrow black cross bands ( 38 upon the body ) 

 which are often interrupted vertebrally. Nape with a broad pale (? pink) 

 band extending on to the sides of the head as far as the eyes, and 

 succeeded by an equally broad band of black ; an oblique streak below 

 the eye and another behind it. Below whitisli ; hinder part of belly 

 and tail thickly powdered with grey. 



The pale ( ? pink ) b:ind acrcss the nape is a juvenile character ; 

 in halt-grown individuals it miiy be ttill well marked, but disappears 

 entirely in adult life. Gunther menlitns the presence of this band in 

 liis description, but in the Fauna of British Lidia, and in the 

 Catalogue, it is omitted. 



53. T RoPiDuNuTus IXAS Laidlaw. 



Khao Wang Hip (upper camp), Nakon Sitamarat, 1 c^ specimen. 



The type and hitherto only known specimen of this snake was 

 obtained by the Skeat expedition to the iVIalay Peninsula in 1899-1900. 



To Mr. Laidlaw's original description the following may be 

 added : — Frontal longer than its distance to the end of the snout ; 

 3 post-oculars ; 9 upper labials, fourth to sixth entering the eye ; 

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

 as long as the posterior ; scales keeled, the outer row not quite as 

 strongly as the others. Ventrals 148, subcaudals 103. Total length 

 380 mm., tail, 120. Maxillary teeth, 24 in number. 



Colour ( in spirits). Above, very dark olive brown, witli in- 



VOL. II, DEC. liilfi, 



