49. scELoPoRus. 227 
a. Q Mexico. 
Bu Ss. Puebla. 
c. Her, Altisco. 
d. Q. Guanajuato. 
e-l. § 2 & hor. Presidio, W. Mexico. Hy. A. Forrer (C.]. 
m-n. Q & her. California (?). 
Var. horridus. 
Tropidolepis horridus, Gray, Cat. p. 209. 
Sceloporus horridus, Wtegm. Herp. Mex. p. 50; Bocourt, Miss. Se. 
Mex., Rept. p. 178, pl. xviii. fig. 8; Cope, Proc. Am. Philos. Soc. 
xxii. 1886, p. 394. 
Tropidolepis horridus, Dum. § Bibr. iv. p. 806. 
Sceloporus oligoporus, Cope, Proc. Ac. Philad. 1864, p. 177. 
Distinguished by the smaller number of femoral pores, viz. two 
to five on each side. 
Mexico. 
a,b, 9 & her. Cuernavaca. 
ce. Yg. Ventanas. Hr, A. Forrer [C.]. 
Var. clarkii. 
Sceloporus clarkii, Baird § Gur. Proc. Ac. Philad. 1852, p. 127, and 
U.S. Mex. Bound. Surv., Rept. p. 5; Yarrow, in Wheeler's Rep. 
Explor. W. 100th. Mer. v. p. 575, pl. xxiii. fig. 1. 
—— magister, Hallow. Proc. Ac. Philad. 1854, p. 93, and Rep. U.S. 
Explor. Surv. R. R. x. part iv. 1859, p. 5. 
—— floridanus, Baird, Proc. Ac. Philad, 1858, p. 254. 
—— thayerii (non B. § G.), Bocourt, Miss. Sc. Mexv., Rept. p. 176, 
pl. xviii. fig. 5. 
Femoral pores twelve to fifteen on each side. 
S. United States; N. Mexico. 
a. Q. Colorado Bottom. Smithsonian Institution [P.]. 
b. Q. California. 
ad. Mexico. 
This form appears to be completely linked with S, undulatus. 
11, Sceloporus undulatus. 
Tropidolepis undulatus, Gray, Cat. p. 208. 
Agama undulata (Bose), Daudin, Rept. iii. p. 384; Harlan, Med. 
_ Phys. Res. p. 140, 
Lacerta hyacinthina, Green, Journ. Ac. Philad. i. 1818, p. 349. 
fasciata, Green, 1. ¢. 
Uromastyx undulatus, Mer. Tent. p. 57. 
Tropidolepis undulatus, Gray, Griff. A. K. ix. Syn. p. 43; Dum. & 
Bibr. iv. p. 298; Holbr. N. Am. Herp. ii. p. 73, pl. ix. 
Sceloporus undulatus, Fitaing. Syst. Rept. p. 75; Girard, U.S. Expl. 
Exped., Herp. p. 379, pl. x1x. figs. 15-21; Bocourt, Miss. Sc. Mex., 
Rept. p. 195, pl. xvili. bis. fig. 11; Cope, Proc. Am. Philos. Soc. 
xx1i. 1885, p. 395. 
a2 
