146 bulletin: museum of comparative zoology. 



ish gray sprinkled with pale, yellowish green, the spots very abundant 

 and partly confluent posteriorly; flanks marked by four broad, verti- 

 cal stripes of pale bluish gray, each stripe edged with dark slaty gray; 

 sides and upper surface of the head broadly blotched with pale, bluish 

 yellow. 



Habitat:— Cuba, the Isle of Pines, and the neighboring Cays. 



Description: — Adult male, M. C. Z., 11050 from the Valley of Luis 

 Lazo, western Cuba, April 1915, C. de la Torre and T. Barbour. 



Rostral as wide as the mental, broadly in contact with nasals; 

 nasal large, somewhat pentagonal, perforated by a large, ovoid nos- 

 tril; each nasal in contact with a large, elongate supranasal and a 

 squarish postnasal; nasals and supranasals broadly in contact in 

 the middle of the snout; the pair of supranasals immediately fol- 

 lowed by two pair of large prefrontals, the posterior pair several times 

 as large as the anterior pair, both pairs of prefrontals broadly in 

 contact in the middle hue of the snout ; a few granules on the crossing 

 point of the two prefrontal sutures; all these scutes covering the upper 

 surface of the snout slightly swollen and convex; between prefrontals 

 and the scarcely indicated supraocular semicircular two irregular rows 

 of scales, the anterior row formed of scales several times as large as 

 those in the posterior one; immediately following the posterior row a 

 large rounded median scale; supraorbital semicircle differentiated 

 from the supraocular disc but the scales on the outer and anterior 

 portion of the supraocular region smaller than the others ; semicircles 

 separated by two, partly by three, rows of large scales; occipital 

 located with its posterior end on a line with the posterior end of 

 the semicircles; scales of the occipital region enlarged and swollen, 

 the outer ones largest; about two rows of scales between the occipital 

 and the semicircles; two or three rows of superciliary shields not 

 clearly differentiated; canthus rostralis consisting of three large scales, 

 the first elongate and in contact with two superciliary scales that are 

 also elongate; all of these scales on the top of the head swollen, 

 slightly keeled, and, with the exception of the small supraocular scales, 

 uniformly enlarged; a well-developed series of strongly keeled sub- 

 oculars continued backward as a supratympanic series; six supra- 

 labials to the middle of the eye; a series of three or four rows of small 

 scales separating the supralabials from the suboculars; above the 

 angle of the mouth and in front of the lower edge of the ear a large 

 tubercular shield ; above it about the middle of the front edge of the 

 ear two large shields, preceded by a third, all three tubercular; 

 below the angle of the mouth a few tubercular scales, irregularly 



