become obscure or spotted in the adults of some species; Family Teii- 



dae. Race Runners or Striped Lizards 63. 



Scales of belly smaller and more numerous; without definite lengthwise 



stripes, except in some species with large, spiny scales 68. 



63. With one frontoparietal plate on the head; southern and Lower Cal. and 



outlying islands 



Cnemidophorus hyperythrus Cope Cape Striped Li2;ard 

 With two frontoparietals 64. 



64. Scales on posterior edge of throat fold very small 65. 

 With enlarged scales on the posterior edge of the throat fold 66. 



65. Color pattern in lengthwise stripes only; Utah to Texas 



Cnemidophorus perplexus B. & G. Striped Race Runner 

 Adults usually with light bars on dark stripes to form a checker-board 

 pattern; Colo, to Wash, and Cal. 



Cnemidophorus tessellatus (Say) Tessellated Race Runner 

 and varieties 



66. With light bars on dark stripes in a checker-board pattern; Texas 



Cnemidophorus grahamii B. ^ G. Tiger Race Runner 

 Sometimes light spotted, but not definitely light and dark barred 67. 



67. With two light stripes (dorsolateral and one below it) on each side of 



the tail; no light spots on adults; Mississippi Valley, and Florida to 

 Maryland and Ariz. 



Cnemidophorus sexhneatus (Linn.) Six-lined Race Runner 

 With a single light stripe (dorsolateral) on each side of the tail; adults 

 usually light spotted; Arkansas to Ariz., and southwards 



Cnemidophorus gularis B. £s? G. Spotted Race Runner 



68. Skin very soft, without obvious scales; no throat fold; pupil of eye verti' 



cal in bright light; toes without ridges below; about two to three 

 inches long; Family GeWonidae (part) 69. 



Skin tougher; either with a throat fold or folds or with large, spiny 

 scales; pupil of eye round; toes with lengthwise ridges below; often 

 larger; Family Iguanidae (part) 70. 



69. Tail with dark rings; with three to six femoral pores on rear of each 



thigh, with a space between the two series; N. M. and Texas 

 Coleonyx brevis Stejneger Lesser Banded Gecko 

 Tail dark barred above; with six to ten femoral pores on the rear of each 

 thigh, forming a continuous V-shaped series; Utah to Cal. 



Coleonyx variegatus (Baird) Variegated Banded Gecko 



70. Scales along the edge of the upper jaw (upper labials) oblique and over' 



lapping 7L 



Upper labials upright and not overlapping 8L 



71. No visible ear openings Spotted Lizards 72. 

 With visible ear openings 78. 



72. With dark spots or bars on under side of tail 73. 

 No dark markings on under side of tail 74. 



73. Tail mostly flattened; tail dark barred below; back usually with small 



374 



