Scales on sides sloping upwards posteriorly; light lines, if present on back, 

 wider 91. 



91. With a slit-like depression just behind each hind limb; usually with a 



dorsolateral light stripe on each side of back enclosing two rows of 

 dark spots, with a mid'dorsal light stripe between them; male with 

 a large pink area on each side of belly; Texas 



Sceloporus variabilis marrnoratus (Hallowell) 

 Pink-bellied Swift 

 No slit-like depression so situated; pattern various; no pink areas on 

 belly 92. 



92. Usually about 30 ( — 3) scales along the back from the base of the head 



to a point opposite the hind margin of the hind leg; rear surface of 

 thigh usually unmarked; N. M. and Texas 



Sceloporus spinosus Wiegmann Texas Spiny Swift 

 (Includes S. fioridanus Baird or S. olivaceus Smith) 

 Usually well over 30 scales along the back, or with a dark mark or mark' 

 ings on the rear surface of thigh 93. 



93. With small, granular scales on rear surface of thigh; average scale count 



usually 48 or over; Colo, to Wash, and Cal. 



Sceloporus graciosus B. fe? G. Sage Brush Swift 

 (and subspecies) 

 With larger, overlapping scales on rear surface of thigh; average scale 

 count usually under 48 94. 



94. Fourth toe of hind foot extremely long — almost twice as long as the 



third toe; with a broad dark band along each side; Florida 

 Sceloporus woodi Stejneger Florida Pine Lizard 

 Fourth toe not greatly longer than third toe 95. 



95. Scales of back not noticeably larger posteriorly, gradually blending in 



size into those of sides; westward from Kansas (Two common sub' 

 species of S. occidentalis given here) 96. 



Scales of back larger posteriorly than those of sides; eastward from 

 Nevada (Variations of S. undulatus) 97, 



96. Supraoculars (large scales covering area of eyeball) in two rows; throat 



of male with median blue color; Wyoming to Wash, and Cal. 

 Sceloporus occidentalis hiseriatus (Hallowell) 

 Western Fence Lizard 

 Supraoculars in one row; throat of male with blue coloring on each side; 

 Wash, to Cal. 



Sceloporus occidentalis occidentalis (B. ^ G.) 

 Pacific Fence Lizard 



97. Usually with two light stripes (dorsolateral and one below it) on each 



side 98. 



Back relatively unstriped or with dorsolateral stripes only 99. 



98. Males with blue color on each side of throat; each thigh usually with 



more than fifteen femoral pores; western N. D. to western Texas 

 Sceloporus undulatus consohrinus (B. & G.) 

 Southern Prairie Swift 



377 



