446 bulletin: museum of comparative zoology. 



Rostral forming an acute angle behind; nostril on the posterior 

 border of the anterior nasal; anterior pair of nasals narrowly in con- 

 tact behind rostral; frontonasal longer than wide, in contact with 

 the loreal; prefrontals broadly in contact; frontal in contact pos- 

 teriorly with the first supraocular, for nearly its entire length with the 

 second; a pair of frontoparietals separated for their entire length 

 from the third supraocular by a double row of granules; eight occipi- 

 tals in a transverse row consisting of a median pair and a group of 

 three on either side; four supraoculars the first separated from the 

 loreal; three posterior supraoculars separated from the supraciliaries 

 by a single, partly double row of granules; last supraocular separated 

 from the outer occipitals by three or four rows of small scales; seven 

 large supralabials; five infralabials; between infralabials and chin- 

 shields a wedge composed of a single row of granules and small scales 

 extending anteriorly to the first chin-shield; chin and throat covered 

 with minute granules, a distinct band of larger ones extending across 

 the middle of which the median ones form an ill-defined central group 

 of slightly larger ones; on the portion between the two throat folds 

 several rows of large hexagonal scales; under side of the body with 

 twelve longitudinal and thirty-four transverse rows of plates; pre- 

 anal plates in a marginal row decreasing in size from the median pair, 

 and in a median line one plate larger than the marginal ones, and 

 another smaller one in advance of this; on the lower arm one row of 

 very wide, and another narrow row of antebrachials breaking up into 

 small scales proximally; on the upper arm three rows of brachials 

 the median largest; on the posterior side near the elbow joint a group 

 of slightly enlarged postbrachials ; under side of thighs covered dis- 

 tally with four rows of plates, outer row considerably the largest; 

 breaking up proximally into ten or twelve narrower rows; twenty- 

 four and twenty-five femoral pores; on the under side of the tibia 

 three rows of plates, those of the outer row greatly enlarged; upper 

 side of the wrist covered with granules; outer toe not extending quite 

 so far as the inner; tail covered with straight, keeled scales; about 

 thirty-three scales in the fifteenth ring from the base. 



Coloration: — Dorsal surface olivaceous gray, slightly yellowish espe- 

 cially on the head and tail; whole upper surface posterior to the shoul- 

 ders spotted with pale whitish or yellowish blotches, those of the flanks 

 being largest ; ventral surface straw-color washed with blue on the belly. 



Variation: — A female (same data as above) differs from the male 

 in having fewer spots dorsally. A young specimen (same data) is 

 very different from either of the adults. There are seven narrow white 

 lines running the length of the upper surface of the body; the two 

 outermost on each side border a wide brown band. In place of the 

 pale spots of the adult male on the upper surface there are four series 

 of black spots between the dorsal stripes. The ventral surface is 

 paler and more green than that of the adult. 



