Art. VI.] HerricK“Terry-Herrick, New Mexico Limrds. 127 
Sceloporus Occidentalis, Baird and Girard. (?) 
Plate XVII, Figs. 12-14.. 
Description : Head and body somewhat depressed ; nasal 
openings nearer the end of snout than the orbit; upper head 
plates smooth, somewhat convex, somewhat imbricated ; inter- 
parietal largest ; frontal divided transversely, cephalic portion 
larger ; parietals and frontoparietals separated from the enlarged 
supraoculars by a series of granules ; latter in the single series, 
very broad and convex, separated from the narrow, imbricated 
superciliaries by a series of granules , middle suboccular long 
and keeled ; rostral plate broader than high ; labials long and 
low, the upper and lower nearly equal ; symphyseal plate very 
large, followed by a row of enlarged plates on either side, which 
are separated from the lower labial by a single row of sublabials; 
gular scales smooth, flat, some of them bicuspid ; strongly im- 
bricated ; ear opening of moderate size, protected in front by 
about three enlarged scales ; back with equal, keeled, short- 
pointed scales in longitudinal parallel rows ; about 22 or 24 
rows of keeled dorsals ; scales of sides ranging obliquely up- 
ward, passing gradually into the smooth ventrals ; scales of the 
dorsal surfaces of the limbs like those of the back, those of the 
posterior surfaces of the thighs smooth, no longitudinal dermal 
folds ; scales of the tail like those of the back, but larger ; fe- 
moral pores 16 to 18; about ten dorsal scales equal in length to 
the shielded part of the head ; number of scales from the inter- 
parietal to a line connecting the posterior aspect of the thighs 
40 to 42 ; males with enlarged postanal scales. 
Color : Brownish or grayish above, with a lateral light 
stripe on either side, crossed a zig zag line of dark brown which 
usually does not cross the median line but may cross the light 
lateral bands and merges with the darker coloring of the sides; 
head marked with brown, especially a transverse line connect- 
ing the supercilaries and another in front of the eyes ; a dark 
line passing through the eyes ; upper surfaces of legs marbled 
with dark ; tail obscurely ringed with dark ; lower parts light ; 
male with two spots on the gular region, not confluent on the 
