358 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 92 
Description of holotype.—Interparietal a little less than three times 
size of parietal; one frontoparietal on each side, separated from each 
other by a small median scale; posterior section of frontal a little 
more than half size of anterior; two prefrontals in contact medially; 
three frontonasals, the median not separated from the others; inter- 
nasals irregular; four postrostrals; two canthals; a subnasal and an 
elongate loreal; preocular divided transversely; an elongate suboeular 
and two postoculars; two rows of lorilabials, complete below eye; 
two rows of supraoculars, the scales in the outer row about one-half 
to one-third size of scales in inner row; outer row of labiomentals not 
reaching mental; inner row reaching to suture between second and 
third infralabials; four supralabials to a point below middle of eye; 
most of gular scales with a single apical notch; those near gular 
fold area with two notches. 
Temporal scales keeled, rather strongly mucronate; six auricular 
lobules on. one side, four on other; scales between ear and lateral 
nuchal pocket about half size of dorsal scales, larger than scales 
between lateral nuchal pocket and arm, keeled and strongly mucronate, 
weakly denticulate. Dorsals weakly keeled, mucronate, feebly den- 
ticulate (more strongly anteriorly) ; lateral scales a little more strongly 
mucronate and more denticulate than dorsal scales; scales distinctly 
decreasing in size laterally, those halfway between axilla and groin 
smaller than middorsal scales; 41 scales from occiput to base of tail; 
46 scales around middle of body. 
Scales on dorsal surface of upper foreleg nearly twice as large as 
those on lower foreleg, all keeled, mucronate and denticulate; dorsal 
scales on shank and thigh subequal to each other and to scales on 
dorsal surface of upper foreleg, a little smaller than dorsal scales 
on body, and a little more strongly keeled and mucronate; dorsal 
scales on tail considerably larger than dorsals on body, more strongly 
keeled and mucronate; subcaudals smooth except toward tip of tail; 
femoral pores 15-16. 
Snout to vent 85 mm.; tail 125 mm.; tibia 15 mm.; snout to occiput 
16 mm.; snout to posterior border of ear 20 mm. 
Color—Adult male: Entire dorsal surface dark slate gray, without 
markings save a broad, black nuchal collar covering eight scales 
medially; collar bordered on either edge by a narrow, light, un- 
interrupted band one scale wide; digits feebly banded; tail with very 
indistinct dark bands distally. Ventral surface of head dark blue; 
black nuchal collar extending onto gular region, almost interrupted 
midventrally; area between arm insertions and a broad median line 
on belly mostly light; sides of belly, from axilla to groin, blue-gray, 
not black-bordered medially; numerous, distinct, transverse black 
streaks on sides of belly, not extending as far medially as the bluish 
