No blue throat color; each thigh usually with less than fifteen femoral 

 pores; S. D. to Okla. 



Sceloporus undulatus garmani (Boulenger) 

 Northern Prairie Swift 



99. Average scale count over 45 ; Colo, to Nevada and Ariz;. 



Sceloporus undulatus elongatus Stejneger Colorado Swift 

 Average scale count under 45 100. 



100. Average scale count over 38; Georgia to Maryland and Ind.; Texas 



Sceloporus undulatus fasciatus (Green) Northeastern Fence 



Li2;ard 

 (Sceloporus undulatus hyacinthinus (Green) ) 

 Average scale count under 38; La. to S. C. 



Sceloporus undulatus undulatus (Latreille) 

 Southeastern Fence Li2,ard, Pine Swift 



101. Tiny scales in a row directly above the eye upright and not overlapping; 



tail thick and blunt, not longer than head and body; Utah to Cal. and 

 Ariz. 



Sauromalus ohesus (Baird) Chuckawalla 

 (Sauromalus ater of Cope) 

 Superciliary scales oblique and overlapping; tail, when entire, narrow 

 and longer than head and body 102. 



102. Plates on top of head small 103. 

 Plates on top of head larger, the interparietal being larger than the ear 



opening 107. 



103. With several lengthwise rows of scales on top of the head between the 



area of the eyeballs; rostral plate three to four times as wide as the 

 labial on each side of it 104. 



With one or two lengthwise rows of scales on top of the head between 

 the area of the eyeballs; rostral plate twice as wide as the labial on 

 each side of it 105. 



104. Young light barred; adults dark blotched only; head wider than distance 



from nostril to ear opening; Oregon to Texas and Cal. 



Crotaphytus wislizenii B. & G. Common Leopard Lizard 

 (Gamhelia wishzemi (B. &?G.) ) 

 Back with several light cross bars in both young and adults; head not 

 wider than distance from nostril to ear opening; Cal. to Wash. 

 Crotaphytus sUus Stejneger Barred Leopard Lizard 



105. With a light network on the back; with only faint traces of bands around 



the neck, or these are often absent; Texas and La. 



Crotaphytus reticulatus Baird Reticulated Lizard 

 With light spots on the hack; with two black bands around the neck 106. 



106. Scales on top of the head between the area of the eyeballs mostly in one 



row; throat of male plain; Mo. to Texas and N. M. 



Crotaphytus collaris collar\s (Say) Eastern Collared Lizard 

 With two complete rows of scales on top of the head between the area 

 of the eyeballs; throat of male with dark markings; Idaho to Cal. and 

 Texas 



Crotaphytus collaris haileyi (Stejneger) 



378 



