74 LACERTILIA. 
collar-fold. Throat generally with irregular oblique blackish lines. Males with the 
sides of the abdomen blue, the middle being whitish. 
An adult male is 23 inches long without tail. 
23. Sceloporus eneus. 
Sceloporus eneus, Wiegm. Isis, 1828, p. 370; and Herpet. Mex. p. 50; Bocourt, Miss. Sc. Mex., 
Rept. p. 205, t. 18 bis. figg. 4, 4a, 6; Cope, Proc. Am. Phil. Soc. 1885, pp. 170, 379, 397 ; 
Boul. Cat. Liz. ii. p. 238. 
Hab. Mexico, Puebla (Boucard), Matamoros Izucar (Ferrari-Perez), Orizaba (Mus. 
Lrit.), Jalapa (U.S. Nat. Mus.), Jalisco, north of the Rio Santiago (Richardson). 
Thirty-one scales in a series along the middle of the back; dorsal scales keeled, 
pointed. Supraoculars in more than one series, rather small. Length of the hind 
limb less than the distance between the vent and collar, and length of the fourth toe 
scarcely equal to that of the head. From fourteen to nineteen femoral pores on each 
side, the two rows meeting in the median line. Olive, greenish, or copper coloured 
above, with one or two light lines along each side; the back between the lines 
unspotted, or with black marbled spots longitudinally arranged. A black spot between 
the shoulder and collar-fold. Male with the lower parts more or less extensively black. 
An adult male is 24 inches long without tail. 
24. Sceloporus jalapz, sp. n. 
Hab. Mexico, Jalapa (Hége). 
Thirty-eight scales in a series along the middle of the back. A row of large supra- 
oculars, separated from the superciliary edge by two rows of very small ones. ‘Two 
canthal scales; ear-opening with two lobules in front. Length of the hind limb equal 
to the distance between the vent and collar; length of the fourth toe considerably 
exceeding that of the head. From seventeen to eighteen femoral pores on each side, 
the two rows meeting in the median line. Ina much discoloured specimen the sides 
are darker than the back, a differently coloured longitudinal band separating the back 
from the sides. An indistinct darker band runs along the median line of the back. 
Lateral collar-fold deep black. No nuchal collar. Belly in the male blackish on the 
sides, white in the middle line; throat finely mottled. 
The single male specimen known is 1? inch long without tail. 
B. The scales on the sides much larger than the dorsal. 
25. Sceloporus pleurolepis, sp. n. (Tab. XXXII. fig. B.) 
Hab. Mexico, Jalisco, north of the Rio Santiago (Richardson). 
Thirty-three scales in a series along the middle of the back; dorsal scales rounded 
and, mostly, smooth. ‘The scales on the sides are twice or thrice as large as those on 
