SCELOPORUS., 67 
7. Sceloporus undulatus. 
Agama undulata, Daud. Rept. iii. p. 384. 
Sceloporus undulatus, Fitz. Syst. Rept. p. 75; Baird & Gir. U.S. Expl. Exped., Herp. p. 379, t.19. 
fige. 15-21; Bocourt, Miss. Sc. Mex., Rept. p. 195, t. 18 bis. figg. 11, 11 a,b; Cope, Proc. 
Am. Phil. Soc. 1885, p. 398; Boul. Cat. Liz. ii. p. 227. 
Sceloporus thayerii, Baird & Gir. Proc. Ac. N. Sc. Phil. vi. p. 127. 
Hab. Nortu America, United States.—Mexico, Sonora (Baird & Girard) ; GUATEMALA, 
Yzabal (Salvin), 
From twenty-six to thirty-one scales in a series along the back. The large supra- 
oculars not divided. Hind limb as long as, or shorter than, the distance of the vent 
from the collar; fourth toe as long or nearly as long as the distance of the snout from 
the lateral collar-fold. Thirteen to seventeen femoral pores. Greyish, brownish, or 
bronze-coloured, with irregular dark brown bands or transverse spots across the back ; 
no nuchal collar. 
An adult male is 3 inches long without tail. 
This is a northern species which scarcely enters into the limits of the Central- 
American fauna. The reasons which induce me to admit it, are :—(1) because Baird 
and Girard say expressly in the description of their Sceloporus thayerii that it extends 
into Sonora; and (2) because Mr. Salvin’s collection, made at Yzabal, contains a 
specimen which, although it has only twenty-six scales in the dorsal series, cannot be 
kept distinct from S. undulatus. 
8. Sceloporus lunzi. 
Sceloporus lunei, Bocourt, Miss. Sc. Mex., Rept. p. 184, t. 18 bis. figg. 5, 5 a, d, 
Sceloporus formosus, part., Boul. Cat. Liz. ii. p. 222. 
Hab. Guaremata, Coban (Salvin), plateau 1500 metres (Bocourt). 
Twenty-five scales in a series along the back, the dorsal series distinctly convergent 
on the posterior part of the back; scales keeled, with a long terminal spine. A single 
series of large supraoculars. One canthal scale. The anterior lobes of the ear- 
opening not larger than the preceding scales. Hind limb nearly as long as the distance 
of the vent from the collar ; fourth toe longer than the head. Femoral pores thirteen. 
Green ; each dorsal scale with a yellowish spot at the base; blue underneath, the 
middle of the abdomen being yellowish with a black streak on each side ; collar-fold 
ceep black, this colour not extending across the neck or throat. 
Size of adult male 3 inches without tail. 
9. Sceloporus irazuensis, sp. n. 
Sceloporus formosus, part., Boul. Cat. Liz. ii. p. 222. 
fab, Mexico, Southern States ?—Cogra Rica, Irazu (Rogers). 
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