434 bulletin: museum of comparative zoology. 



Rostral forming a trifle more than a right angle behind; nostril 

 on posterior part of anterior nasal; anterior pair of nasals broadly in 

 contact behind rostral; frontonasal longer than wide in contact with 

 the loreal; prefrontals broadly in contact; frontal in contact with the 

 first and second supraoculars; a pair of frontoparietals in contact 

 with the third supraocular for their entire length; five occipitals in a 

 transverse row, the two in contact with the median largest, seven 

 supraciliaries; three supraoculars, the first separated from the loreal; 

 two posterior supraoculars separated from the supraciliaries by a 

 single, part double row of granules, last supraocular separated from 

 the outer occipitals by two rows of granules and a small scale; five 

 large supralabials ; five large inf ralabials ; between infralabial and 

 chin-shields a wedge of one to three rows of granules extending an- 

 teriorly to the postmental; chin and throat covered with minute 

 granules, a band of somewhat larger ones extending across the middle ; 

 on the area between the two throat folds a few rows of large hexagonal 

 scales ; under side of body with eight longitudinal rows (ten including 

 the small scales), and thirty-four transverse rows of scales; preanal 

 plates in a triangular group of three large plates, anteriorly two smaller 

 plates in a transverse line; on the lower arm a double row, one very 

 wide, of antebrachials decreasing in width toward the elbow joint; 

 on the upper arm a similar but narrower single row of plates continuous 

 with the antebrachials; on the posterior side near the elbow a small 

 group of slightly enlarged postbrachials ; under side of the thighs 

 covered with four or five rows of hexagonal plates of which the outer 

 series is considerably larger than the others; fifteen femoral pores; 

 on the under side of the tibia two rows of plates, those of the outer 

 much the larger; upper side of the wrist with a regular series of trans- 

 verse plates corresponding to the inner and outer metatarsals; outer 

 toe extending about as far as the inner; tail covered with keeled, 

 oblique scales dorsally, with smooth straight scales laterally and 

 ventrally; about twenty-eight scales in the fifteenth ring from the 

 base. 



Coloration: — Ground color of dorsal surface very dark olive-gray, 

 head slightly darker; flanks black; two rather widely separated, 

 narrow white bands on each side, the superior starting from the 

 supraciliaries and the inferior from the ear, both extending half way 

 down the tail; a row of indistinct white spots between these white 

 stripes; lower flanks profusely spotted with white or bluish, the spots 

 arranged more or less in vertical rows; ventral surface pale straw- 

 color suffused with dull blue-gray, edges of the shield lightest; chin- 

 shields and under sides of legs more straw-color. 



Variation: — A female (M. C. Z. 8693, same data as above) is 

 similar to the male except that there are no white spots on the lower 

 flanks. A young specimen (M. C. Z. 8742, Manneville, Haiti, 1913, 



