222 G. A. BOULENGER ON 



4 to 4-I- times in length to vent in males, % to 5 times in females ; snout pointed, 

 with sharp can thus and nearly vertical loreal region, as long as the postocular part 

 of the head. Pileus twice as long as broad. Neck narrower than the head. Hind 

 limb reaching the wrist in females, the elbow in males ; foot as long as the head. 

 Tail a little over twice the length of head and body. 



Nostril pierced between 3 to 5 shields. Rostral usually entering the nostril; 

 upper head shields rugose ; frontonasal broader than long, not or but slightly broader 

 than the internarial space ; prefrontals forming an extensive suture ; frontal as long 

 as or shorter than its distance from the end of the snout, if to if times as long as 

 broad, of subequal width throughout or a little narrower behind than in front ; 

 parietals 1^ to if times as long as broad ; interparietal \\ to 2 times as long as broad, 

 much longer than the occipital, which may be broader. 3 supraoculars, first longer 

 than the second and usually in contact with the second loreal ; 3 superciliaries, second 

 longest ; no granules between the supraoculars and the superciliaries. Nasal forming 

 a suture with its fellow behind the rostral and with the anterior loreal above the 

 postnasal, which may be very small or absent, in which case the loreal borders the 

 nostril ; anterior loreal shorter than the second ; 3 or 4 upper labials ' anterior to 

 the subocular, which is not or but little narrower beneath than above. Temporal 

 scales moderately large or rather small, hexagonal, keeled; 1, 2, or 3 large upper 

 temporals, first sometimes in contact with the fourth supraocular ; a long and narrow 

 tympanic shield. 



3 pairs of chin-shields, first and second in contact in the middle. 17 to 22 gular 

 scales in the median line, anterior narrow, juxtaposed, smooth or faintly keeled, 

 posterior increasing in size, imbricate, keeled, and merging gradually into the collar, 

 the plates of which are very distinct, pointed, keeled, and 10 or 11 in number. 



Dorsal plates truncate or shortly mucronate behind, in 6 or 8 longitudinal series 

 on the neck, in 4 on the body. Ventral plates obtusely pointed or shortly 

 mucronate, strongly keeled, in 12 longitudinal and 22 to 25 transverse series. Sides 

 with one upper and one lower series of smaller keeled scales and a median granular 

 area. 26 to 28 plates and scales round the middle of the body. Praeanal plate 

 rather large, smooth or feebly bicarinate, bordered by a semicircle of small keeled 

 plates. 



Upper surface of limbs with rhombic keeled scales. 2 or 3 femoral pores on 

 each side. Subdigital lamellae single, 19 or 20 under the fourth toe. 



Caudal scales strongly keeled and mucronate, the keels forming 4 very strong 

 ridges on the upper surface of the basal part of the tail ; the whorls nearly equal in 

 length, the fourth or fifth containing 14 or 16 scales. 



Olive above, with a yellowish or greenish white, usually black-edged dorso-lateral 

 streak starting from the superciliary edge ; a dark lateral band from the nostril, 

 through the eye and involving the upper half of the ear-opening, to the tail, edged 

 below by a light streak. L,ower parts greenish white (in spirit). Tail reddish in the 

 young. 



1 3 in two specimens, 4 in two, 3 — 4 in the two others. 



