210 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



separated from the superciliaries and from the frontals by a single 

 row of keeled scales; frontals moderate in size, in contact for the 

 posterior portion of their length; occipital small, bordered on each 

 side by two distinct parietals, the inner almost twice as large as the 

 outer and about four times as large as the occipital; four upper and 

 four lower labials to a point below the center of the eye; temporal 

 scales keeled, rather irregular anteriorly, with four larger semi- 

 tubercular scales in a vertical row in front of the ear, the upper the 

 largest; anterior border of the ear with two or three very long pro- 

 jecting scales which nearly cover the tympanum. Dorsal scales very 

 large, imbricate, and highly mucronate; laterals somewhat smaller 

 than the dorsals; ventrals about equal to the dorsals in size, smooth, 

 their posterior edges scarcely denticulate; about 40 to 44 scales 

 around the middle of the body; about 54 scales from the occiput to 

 a point directly above the vent; about 11 dorsal scales equivalent to 

 the distance from snout to occiput; nuchal scales small, those behind 

 the ear small and sharply tubercular; those in the shoulder folds 

 keeled like the dorsals but very minute; two or three abruptly en- 

 larged smooth scales on the edge of the fold directly in front of the 

 shoulder; a distinct lateral fold present. The adpressed hind limb 

 reaches to the posterior corner of the eye. Digits compressed, the 

 fourth toe with 28 tricarinate lamellae. A distinct dorsal crest 

 beginning at the occiput and increasing somewhat on the beginning 

 of the tail, then decreasing; the other caudal scales keeled and mu- 

 cronate ; no verticils. The keels of the laterals and dorsals are directed 

 straight backward, the keels of the latter forming fairly regular rows; 

 the three or four rows of scales within the lateral fold are smaller 

 tnan those above or below them. Tail slightly compressed. A pair 

 of widely separated crescentic postanals in the male, which are not 

 very noticeable, since all the scales surrounding them are large. 



Dimensions: Snout to vent, 73 mm.; head to posterior ear, 17 mm.; 

 tail (tip reproduced), 111 mm. ; foreleg, 32 mm. ; hindleg, 57 mm. ; width 

 of head, 12 mm. 



Color (in alcohol). — Body color pale olive-green above turning to 

 olive-buff below. A dorsal series of seven or eight black chevrons 

 across the back between the two light dorsolateral stripes, these 

 markings continuing on the tail as a series of regularly spaced and 

 symmetrical tail bars; between the eye and the groin a lateral series of 

 light oval spots, quite regularly spaced, with dark areas above and 

 below. A few scattered dark spots on upper surfaces of limbs. 

 Lower parts heavily spotted with dark dots, those on the central 

 region of throat and breast anastomosing into a pair of longitudinal 

 stripes, those on the chin and lips into short transverse bars; others 

 often with a sort of honeycomb pattern, and those on the tail with 

 fairly regular rings. Top of head without markings except for some 



