_Description._--Body and head considerably depressed; snout low, rounded and rather long; nostrils large, opening upward and outward nearer to end of snout than to orbit; head plates large, smooth, nearly flat, interparietal largest; frontal divided transversely; 4 or 5 enlarged supraoculars, separated from the frontals by 1 and from the frontoparietals by 2 series of granules; superciliaries long, narrow and projecting; central subocular very long, narrow and strongly keeled; rostral and supralabials long and low; 6 or 7 supralabials; symphyseal moderately small, followed by 2 or 3 pairs of larger plates separated from the infralabials by 1 or 2 series of moderately enlarged sublabials; gular region covered with small, smooth, hexagonal or rounded scales which change gradually to granules on sides of neck and to larger imbricate scales on the strong gular fold, largest on denticulate edge of gular fold where somewhat larger than ventrals; several enlarged plates in front of ear-opening; ear denticulation short, of 3 scales, the largest not exceeding in length diameter of largest plate in front of ear; back covered with tubercular scales of nearly uniform size becoming granular toward neck and sides of body, scales of central rows very weakly keeled, not imbricate, not mucronate, often separated by minute granules; scales largest on tail, very weakly keeled, shortly mucronate above and on sides, not imbricate; posterior surfaces of thighs and arms covered with small granular scales similar to those on sides of body; other surfaces of limbs provided with imbricate scales, smooth on arm and nearly smooth on forearm and thigh, keeled on upper surface of leg; femoral pores 15 and 16; 26-30 largest dorsals equal shielded part of head; fifth finger not reaching end of second; fifth toe not reaching end of second; adpressed fore limb not reaching insertion of thigh. Head above uniform olive-brown; central portion of the neck, back and base of tail with a uniform brown ground with thickly scattered dots of pale blue on single scales; sides yellowish brown with scattered scales of pale yellow; upper surfaces of limbs and tail light brown dotted with pale blue; chin and gular region deep indigo with yellowish marks laterally and on labials; lower surfaces of body and limbs grayish indigo; large postaxillary blotch of blackish indigo. _Female._--Similar in all respects except femoral pores 13 and 15; light dots on back, limbs and tail indistinct; 2 rows of dark brown dorsal blotches becoming 1 row on tail; an indistinct series of brown lateral blotches; limbs with faint brown cross-bars.