— 9 — 



shield ; subocular elongate, separated from the labials by two series of scales ; 

 three postoculars ; temporals numerous, upper shields smaller and scale-like, 

 the lower larger ; 9 snpralabials, second forming the anterior border of the 

 pit, third smallest, fourth the largest, fifth to ninth suddenly much smaller, 

 subequal ; two lower labials in contact with the anterior chin-shields ; pos- 

 terior chin-shields scarcely differentiated, followed by two pairs of subequal 

 shields ; 25 scales rows around the middle of body, 27 on neck, of which the 

 dorsal series rhomboidal, feebly keeled,, lateral series ovate and smooth ; 144 

 ventrals ; anal entire ; 48 pairs of subcaudals. 



Color in alcohol, yellowish above, with a median series of irregular? 

 transverse, dark brown spots, consisting of two halves, one on each side of 

 median line, always jointed each other, sometimes forming a zigzag band by 

 connection of succeeding spots; lateral sides with three series of dark brown 

 spots ; disappearing on sides of the tail, of which the upper one smallest ; 

 head pale drab above, snout and labials darker, with a broad temporal streak 

 of dark brown color, some of the supralabials of the same color ; lower 

 labials and throat dark brown, spotted with brown ; ventrals pale drab, 

 mottled with two series of irregular brown spots ; subcaudals uniformly pale 

 drab on the tip. 



Total length 550 mm. 



Snout to vent ; 452 mm. 



Vent to tip of tail 98 mm. 



Described from a specimen from Mt. Ari, Central Formosa (Govt. Inst. 

 Sci. coll. No. 92). 



Habitat : — Arisan, Formosa. 



Remarks : — Another specimen from the same locality in the Government 

 Institute of Science collection differs very slightly from the former in having 

 30 scale rows around the neck and 27 on the middle of the body and 10 

 supralabials. Its canthus rostralis is covered by four scales including inter- 

 nasal ; supraocular about one-fourth as wide as interocular space ; subfoeveal 

 posteriorly entering the eye ; there are two series of small dark brown spots 

 along the sides. 



In the year 1909, Barbour described the present species from Formosa 



