CHECKLIST OF REPTILES OF MEXICO 81 



SAUROMALUS VARIUS Dickerson 



Sauromalus varius Dickerson, Bull. Amer. Mus. Nat. Hist., vol. 41, 1919, pp. 

 464-465.— Shaw, Trans. San Diego Soc. Nat. Hist., vol. 10, 1945, pp. 288-290. 



TV^e.— U.S.N.M. No. 64441; C. H. Townsend collector. 

 Type locality. — San Esteban Island, Gulf of California. 

 Range. — The type locality. 



SAUROMALUS OBESUS TOWNSENDI Dickerson 



Sauromalus townsendi Dickerson, Bull. Amer. Mus. Nat. Hist., vol. 41, 1919, 



p. 464. 

 Sauromalus obesus townsendi, Shaw, Trans. San Diego Soc. Nat. Hist., vol. 10, 



1945, pp. 290-292. 



IVpe.— U.S.N.M. No. 64442; C. H. Townsend collector. 

 Type locality. — Tiburdn Island, Gulf of California. 

 Range. — Tiburdn Island, Sonora, and adjacent coast of Sonora at 

 least as far south as Guaymas and east to the vicinity of Hermosillo. 



SAUROMALUS OBESUS TUMIDUS Shaw 



Sauromalus obesus tumidus Shaw, Trans. San Diego Soc. Nat. Hist., vol. 10, 

 1945, No. 15, pp. 269-306. 



Type.—L. M. Klauber No. 27323; L. M. Klauber collector. 



Type locality. — Telegraph Pass, Gila Mountains, Yuma County, 

 Ariz. 



Range. — Extreme northwestern Sonora, southwestern and south 

 central Arizona. Intergrades only, with S. o. townsendi, are recorded 

 from Mexico; typical specimens undoubtedly occur in extreme north- 

 western Sonora and extreme northeastern Baja California, along the 

 Colorado River. 



SAUROMALUS OBESUS OBESUS (Baird) 



Euphryne obesits Baird, Proc. Acad. Nat. Sci. Philadelphia, 1858, p. 253; United 

 States and Mexican boundary survey, vol. 2, Rept., 1859, p. 6, pi. 27. 



Sauromalus obesus obesus, Shaw, Trans. San Diego Soc. Nat. Hist., vol. 10, 1945, 

 pp. 295-301. 



Type.—V.S.IS.M. No. 4172; G. H. Thomas collector (?). 



Type locality. — Fort Yuma, Calif. 



Range. — Southeastern California, southern Nevada, southern Utah, 

 western Arizona, and extreme northern Baja California. Although 

 known from numerous localities within a few hundred feet of the 

 Baja California line, none have actually been taken in that state. 



Genus HOLBROOKIA Girard 



Holbrookia Girard, Proc. Amer. Assoc. Adv. Sci., vol. 4, 1851, p. 201. 

 Cophosaurus Troschel, Arch, fiir Naturg., 1850 (1852), p. 389 (type, Cophosaurus 

 texana Troschel). 



