CHECKLIST OF REPTILES OF MEXICO 91 



Range. — Cape region of Baja California and certain adjacent 

 islands. Reported on the mainland from Cape San Lucas, La Paz, 

 San Jose del Cabo, Miraflores, etc.; also Isla Partida, Isla Espiritu 

 Santo. 



Genus STREPTOSAURUS Mittleman 



Streptosaurus Mittleman, Bull. Mus. Comp. Zool., vol. 91, 1942, pp. 111-117. 



Genotype. — Uta mearnsi Stejneger. 



Range. — Northern portion of Baja California and certain of the 

 islands in the Gulf of California; in the United States: San Diego, 

 Riverside, and Imperial Counties, Calif. 



Species. — Two. 



KEY TO FORMS OF STREPTOSAURUS 



Ij Throat with numerous round light spots; maximum length about 90 mm. 



raeamsi (p. 91) 



Throat mottled, without definite rounded spots; larger maximum length, 



about 104 mm slevini ^^ (p. 91) 



STREPTOSAURUS MEARNSI (Stejneger) 



Uta mearnsi Stejneger, Proc. U. S. Nat. Mus., vol. 17, 1894, pp. 589-591. — Van 

 Denburgh, Occ. Pap. California Acad. Sci., No. 10, 1922, pp. 191-194, pi. 15. 



[Streptosaurus] mearnsi, Mittleman, Bull. Mus. Comp. Zool., vol. 91, 1942, p. 

 111.— Stejneger and Barbour, Check list of North American amphibians 

 and reptiles, ed. 5, 1943, p. 90. 



TVpe.— U.S.N.M. No. 21882; E. A. Mearns collector. 



Type locality. — "Summit of Coast Range, United States and Mexico 

 boundary line, California." 



Range. -Extreme southern California southward through the 

 northern haK of Baja California. Reported from Baja California: 

 Ensenada, San Salado, San Matias, Parral, Matomi, Coyote Bay. 



STREPTOSAURUS SLEVim (Van Denburgh) 



Uta slevini Van Denburgh, Occ. Pap. California Acad, Sci., No. 10, 1922, pp. 



194-196. 

 Streptosaurus slevini, Mittleman, Bull. Mus. Comp. Zool., vol. 91, 1942, p. 112. 



Type. — California Acad. Sci. No. 50506; Joseph R. Slevin collector. 

 Type locality. — Mejia Island, Gulf of California. 

 Range. — Mejia Island and Angel de la Guarda Island, in the Gulf of 

 California. 



Genus CROTAPHYTUS Holbrook 



Crotaphytus Holbrook, North American herpetology, ed, 2, vol. 2, 1842, p. 79. 



Genotype. — Agama coUaris Say. 



«' The senior author has unintentionally referred Pelrosaurus repens to this genus, owing to a lapsus; 

 slevini was intended (Smith, Handbook of lizards, 1946, p. 175), 



861316—50 7 



