146 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. i 
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 line of the snout; afew 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 searcely 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 
