138 BULLETIN 199, UNITED STATES NATIONAL MUSEUM 



corded from Distrito Federal and the states of Durango, Guanajuato, 

 Hidalgo, Jalisco, Mexico, Michoacan, Puebla, and Zacatecas. 



SCELOPORUS SCALARIS UNICANTHALIS Smith 



Sceloporus scalaris unicanthalis Smith, Occ. Pap. Mus. Zool. Univ. Michigan, No- 

 361, 1937, pp. 4-5; Publ. Field Mus. Nat. Hist. zool. ser., vol. 26, 1939, 

 pp. 349-350. 



T^/pe.— EHT-HMS No. 7699; H. M. Smith coUector. 



Type locality.- — Magdalena, Jalisco. 



Range. — Known only from the southern border of the Mexican 

 plateau in central Jalisco, from the eastern border of Lake Chapala 

 westward to Nayarit. Recorded only from the state of Jalisco. 



SCELOPORUS SCALARIS SLEVINI Smith 



Sceloporus scalaris slevini Smith, Occ. Pap. Mus. Zool. Univ. Michigan, No. 361, 

 1937, pp. 3-4; Publ. Field Mus. Nat. Hist., zool. ser., vol. 26, 1939, pp. 

 343-349. 



Type.— Cfilii. Acad. Sci. No. 48013; J. E. Slevin collector. 



Type locality. — Miller Peak, Huachuca Mountains, Cochise County, 

 Ariz. 



Range. — Southern Arizona south to northern Durango, and east to 

 to Nuevo Le6n in Mexico. Recorded from the states cited and from 

 Sonora, Chihuahua, and Coahuila. 



PYROCEPHALUS GROUP 



Species. — Three. 



Range. — Pacific slopes from southwestern Chihuahua to north- 

 western Oaxaca. 



KEY TO SPECIES OF THE PYROCEPHALUS GROUP OP SCELOPORUS 



1, Scales on posterior surface of thigh granular; postfemoral dermal pocket 



present gadoviae (p. 138) 



Scales on posterior surface of thigh larger, imbricate; no postfemoral dermal 

 pocket 2 



2. Dorsal scales larger, 36-41; females not red-headed; males with unbroken 



lateral beUy patches; dark spot on interparietal not enclosing or touching 

 light pineal spot — nelsoni (p. 139) 



Dorsal scales smaller, 41-50; females red-headed, conspicuously barred below 

 on throat; males (and usually females) with a series of broad dark bars on 

 each side of belly; a dark spot surrounding light pineal spot. 



pyrocephalus (p. 139) 



SCELOPORUS GADOVIAE Boulenger 



Sceloporus gadoviae Boulenger, Proc. Zool. Soc. London, 1905, vol. 2, pp. 246- 

 247, pi. 7, fig. 1.— Smith, Publ. Field Mus. Nat. Hist., zool. ser., vol. 26, 1939, 

 pp. 373-377, fig. 53, pi. 31. 



Type.— Brit. Mus. Nat. Hist.; Hans Gadow collector. 



Type Zoca^i^?/. — Mezquititlan, north of Chilpancingo, Guerrero. 



