134 On new Frogs and Snakes from Yunnan. 



148; anal divided; subcaudals 66. Yellowish olive above, 

 with two very indistinct darker streaks along the back ; a 

 blackish lateral band, extending from the eye to the end of 

 the tail ; scales of outer row greyish, edged with black ; upper 

 lip white, with some black on the sutures between the shields ; 

 lower parts uniform bright yellow. 



Total length 350 mm. ; tail 85. 



A single male specimen. 



Allied to T. modestus, Gthr. 



P seudoxenodon sinensis. 



Very closely allied to P. macrops, Blyth, with which 

 specimens from Sze Chuen have been confounded by Giinther 

 and by myself. Distinguished by having usually only seven 

 upper labials, third and fourth entering the eye, 19 or 20 

 scales on the middle of the body as well as on the neck, a 

 smaller number of ventrals, viz. 144 to 158 instead of 160 to 

 175, and a different coloration, the upper labial shields being 

 marked with black bars corresponding to the sutures, and the 

 quadrangular dark brown spots on the anterior part of the 

 belly being absent. 



The numbers of ventral and caudal shields are as follows 

 in the specimens examined : — 



$ . Kia-ting-fu, Sze Chuen, 1070 f. (Pratt) 158+ ? 



$• „ „ „ , 158+55 



3 . Son-pan-ouei, Sze Chuen, 10,000 f. (Styari) .... 144 + 67 



J . Yunnan Fu, 6000 f. (Graham) 155 + 67 



$• „ „ „ 154+62 



In a fresh condition this snake is olive-green above, with 

 black and yellow or orange spots, the latter usually forming 

 a vertebral series, at least on the posterior part of the body ; 

 a blackish streak along each side of the nape, sometimes 

 united in a point on the occiput ; an oblique black streak 

 from the eye to the angle of the mouth ; frequently a light 

 cross-band between the eyes.; loreal region and upper lip 

 bright yellow or orange, the labial shields with black lines 

 corresponding to the sutures between them ; belly yellow or 

 orange in front, uniform or speckled with blackish, greenish 

 or dark greyish olive behind, more or less profusely speckled 

 with black. 



Total length 780 mm. ; tail 140. 



