TEIID LIZAIiDS OF THE GEXUS CXEMIDOPHOIIUS 111 



ollit'i". A widened, yellowish, iiiiddorsal streak is usually apparent, 

 and this, when present, separates i/idaris from pevplcxus. Certain 

 specimens of giilaris differ from scxlineatus by the presence of en- 

 lai'^jjod scutes or poly«;ones on the posterior surface of the forearm, 

 in the attainment of a body length of over 85 mm. (snout to anus), 

 in the presence of spots in the lateral fields, or in the appearance of 

 crossbars and reticulations on the sides. Any of these differences 

 from sex'Uneatus is sufficient for separation. 



Cridaris differs from deppil and guttatus in the normal possession 

 of four supraoculars instead of three. Moreover, the latter forms 

 never have crossbars on the sides or enlarged scutes under the forearm. 



Deso'iption. — Snout moderately pointed to l)lunt; nostril anterior 

 to nasal suture; anterior nasal usually not in contact Avith second 

 upper labial; supraocular normalh- 4; supraocular granules often 

 not extending forward past the anterior border of the fourth supra- 

 ocular (north), but sometimes extending far forward (south); 

 frontoparietals normally 2; parietals normally 3; anterior gulars 

 moderate to large, graded, usually largest centrally; posterior gulars 

 smaller, although sometimes secondarily enlarged just anterior to the 

 first gular fold; mesoptychium usually, although not always, with 

 rather scutes, these uniform or graded and often somewhat enlarged 

 centralh^, in 1-5 rows; postmesoptychial granules minute, usually 

 hidden by posterior gular fold, seldom in view on edge of 

 mesoptychium. 



Bodj^ elongate; ventral plates in 8 longitudinal and 32-40 trans- 

 verse rows; dorsal granules minute to large; limbs well developed; 

 l)rachials 5-12; antebrachials 2-6; brachials more or less continuous 

 with antebrachials at a point of contact; posterior side of forearm 

 with granules, polygones or scutes; femorals' 4-12; tibials 3-5; 

 femoral pores 15-26; tail elongate, tapering; caudal scales smooth 

 beloAv, keeled al)ove; lateral caudals moderately large, with series 

 of more or less oblique, distinct, longitudinal keels, these usually 

 much weaker than in tessellatus, often very w^eak. 



Coloration highly variable; ventral surfaces usually with a dark 

 blue suffusion, especially on the chest and aljdomen. or only on one 

 of these, but under parts sometimes light as in sexlineatus and ;>e/'- 

 plcxus; throat of breeding males often pinkish, of females dai'ker, 

 duller, sometimes bluish. l)ut throat of both sexes usually uniformly 

 white or j^ellowish; tail unspotted below, but either unicolor or retic- 

 ulated above; femora normally unspotted in the common lined 

 phase, but more or less distinctly spotted in the larger spotted or 

 crossbarred phase; back lined or unlined; if lined, four to eight 

 stripes present, and a widened, yellowish, middorsal streak usually 

 in evidence; if unlined, vestiges of stripes may or may not be present; 

 but size large and crossbars on spots always present; spots present or 



