70 LACERTILIA. 
Adult specimens are 24 inches long without tail. 
The evidence of this form extending into Mexico rests, at present, upon a badly- 
preserved specimen in the British Museum, purchased of M. Boucard, and stated by 
him to have been obtained at Putla in Mexico. 
14. Sceloporus pyrrhocephalus. 
Sceloporus pyrocephalus, Cope, Proc. Ac. N. Se. Phil. xvi. p. 177. 
Sceloporus pyrrhocephalus, Cope, Proc. Am. Phil. Soc, 1885, p. 394. 
Hab. Mxxtco, Colima (Xantus, W. Lloyd). 
The typical specimens were from the same locality. 
Thirty-three or thirty-four scales in a series along the back ; dorsal scales in oblique 
convergent series, distinctly keeled, and with a terminal spine. Supraoculars broad, 
in a single series. Canthal scutes two; a pair of large mentals behind the front lower 
labial. Hind limb equal to the distance of the vent from the fore limb; fourth toe 
longer than the head. Femoral pores thirteen. ‘Tail strongly compressed. Bronze- 
coloured above, with a broad, black, light-edged band along the side; abdomen blue 
on the sides, with a row of dark blue or black cross-bars on each of the blue lateral 
halves; throat with oblique bluish lines; a black cross-band in front of the shoulder ; 
an elongate black spot with yellow centre in the middle of the occiput. 
Size of adult male 2? inches without tail. 
15. Sceloporus chrysostictus. 
Sceloporus chrysostictus, Cope, Proc. Ac. N. Se. Phil. xviii. p. 125; and Proc. Am. Phil. Soc. 1885, 
p- 896; Boul. Cat. Liz. ii. p. 235. 
? Sceloporus cupreus, Bocourt, Miss. Sc. Mex., Rept. p. 210, t. 18 bis. fig: 2. 
Hab. Mexico, Yucatan (A. Schott in U.S. Nat. Mus.). 
The localities “Guatemala (Cope)” and “Oaxaca (Bocourt)”’ require further con- 
firmation. 
Thirty-two scales in a series along the middle of the back; scales on the back 
keeled, pointed, and without prominent spine. Supraoculars in a single series, large. . 
Limbs very slender; the hind limb is longer than the distance of the vent from the 
collar, and the length of the fourth toe equals the distance of the snout from the 
shoulder. From thirteen to fifteen femoral pores. Brownish or greenish olive above, 
with indistinct brown markings; a broad light iridescent band along each side of the 
back; axil of the fore limb black; sides with one longitudinal and three or four 
transverse blackish bands behind; no collar on the neck, also the collar-fold is colour- 
less. Lower parts whitish; male without distinctive coloration of the abdomen. 
The adult male is 25 inches long without tail. 
