CHECKLIST OF REPTILES OF MEXICO 117 



Type locality. — Slopes of Cerro de San Luis, about 15 miles north of 

 Oaxaca, Oaxaca. 



Range. — Kno^v^l only from the highlands of Oaxaca. 



SCELOPORUS OLIVACEUS Smith 



Sceloporus spinosus floridanus, Stejneger, North Amer. Fauna, No. 7, 1893, 

 p. 181 (nee Baird). 



Sceloporus olivaceus Smith, Trans. Kansas Acad. Sci., vol. 37, 1934, pp. 263, 

 277-279; Publ. Field Mus. Nat. Hist., zool. ser., vol. 26, 1939, pp. 110-118, 

 pis. 13-14; Univ. Kansas Sci. Bull., vol. 31, 1946, pp. 103-106. 



Type.— EUT-HMS No. 2508; E. H. Taylor and John S. Wright 

 collectors. 



Type locality. — Arroyo Los Olmos, 3 miles southeast of Rio Grande 

 City, Starr County, Tex. 



Range. — Extreme south-central Oklahoma, southward through 

 central Texas to southern Tamaulipas, central Nuevo Le6n, south- 

 eastern Coahuila, and San Luis Potosi. Recorded from each state 

 named. 



UNDULATUS GROUP 



Species. — Four, with a total of 13 forms. Extralimital are 9 forms 

 all restricted to the United States and Mexico. 



Range. — British Columbia and southern New York south to 

 northern Baja California and central Zacatecas. 



KEY TO MEXICAN SPECIES OF THE UNDULATUS GROUP OF SCELOPORUS 



1. Supraoculars large, entire; femoral pore series separated by 9 or more scales; 



gular patches small, widely separated cautus (p. 117) 



Supraoculars smaller, divided; femoral pore series separated by 8 or fewer 

 scales, or, gular patches large, often covering entire throat 2 



2. Femoral pore series separated by 9 scales or more; scales on posterior surface 



of thigh abruptly differentiated from dorsal scales of same member, the 

 median posterior scales not distinctly larger than adjacent lateral posterior 



scales occidentalis biseriatus (p. 118) 



Femoral pore series separated by 8 scales or less; scales on posterior surface of 

 thigh gradually merging with larger dorsals of same member, at least the 

 median posterior scales distinctly larger than the adjacent lateral posterior 

 scales 3 



3. Males without lateral belly patches; dorsolateral and lateral hght stripes very 



clearly defined undulatus virgatus (p. 118) 



Males with lateral belly patches; dorsolateral and lateral light stripes poorly 

 defined undulatus consobrinus (p. 118) 



SCELOPORUS CAUTUS Smith 



Sceloporus cautus Smith, Occ. Pap. Mus. Zool. Univ. Michigan, No. 387, 1938, 

 pp. 2-7; Publ. Field Mus. Nat. Hist., zool. ser., vol. 26, 1939, pp. 173-174. 



Type.— EUT-HMS No. 13027; E. H. Taylor and H. M. Smith 

 collectors. 



