192 BULLETIN 19 9, UNITED STATES NATIONAL MUSEUM 



Range. — Southern California west of the Sierra Nevada, south to 

 central Baja California, exclusive of the extreme northeastern corner; 

 islands in the Gulf of California near the center of the Peninsula 

 (Isla Partida, Angel de la Guarda). 



Genus GYMNOPHTHALMUS Merrem 



Gymnophthalmus Merrem, Tentamen systematis Amphibiorum, 1820, p. 74. — 

 Stuart, Occ. Pap, Mus. Zool. Univ. Michigan No. 409, 1939, pp. 1-10, pi. 1. 



Epaphelus Cope, Journ. Acad. Nat. Sci. Philadelphia, 1875, p. 115 (type, Epa- 

 phelus sumichrasti Cope;. 



Blepharactisis Hallowell, Proc. Acad. Nat. Sci. Philadelphia, 1860, p. 484 

 (type, Blepharactisis speciosa Hallowell). 



Genotype. — Lacerta guadrilineata Linnaeus [= Gymnophthalmus lin- 

 eata (Linnaeus)]. 



Range. — Central Argentina north through South and Central 

 America. In Mexico, Oaxaca and possibly Chiapas. 



Species. — Seven. Only one occurs in Mexico. 



GYMNOPHTHALMUS SUMICHRASTI (Cope) 



Epaphelus sumichrasti Cope, Journ. Acad. Nat. Sci. Philadelphia, 1876, p. 115. 



Gymnophthalmus sumichrasti,"^^ BocouRT, Mission scientifique au Mexique . . ., 

 Etudes sur les reptiles, livr. 7, 1881, pp. 471-472, pi. 22H, fig. 2, 2a-2h.— 

 BotJLENGER, Catalogue of the lizards in the British Museum, vol. 2, 1885, 

 pp. 428-429.— Stuart, Occ. Pap. Mus. Zool. Univ. Michigan, No. 409, 1939, 

 pp. 5-6. 



TVi^e.— U.S.N. M. No. 30245-46; Frangois E. Sumichrast collector. 



Type locality. — "Western part of the State of Tehuantepec" ("Near 

 Ventose 'B&j" fide Dunn in Stuart, loc. cit.). 



Range. — Southern Oaxaca near the Isthmus of Tehuantepec east- 

 ward on Pacific slopes possibly to Honduras. Recorded in Mexico 

 only from Oaxaca: Tehuantepec, Bahia Ventosa, Mount Guengola, 

 Cacoprieto. A specimen, presumably of this species, was seen near 

 San Ricardo, Chiapas, by the junior author. 



Family HELODERMIDAE Gray 



Helodermidae Gray, Proc. Zool. Soc. London, 1837, p. 132. 



Genera. — A single genus, Heloderma Wiegmann, is known. 

 Range. — Southern Utah to the Isthmus of Tehuantepec, on Pacific 

 slopes. 



Genus HELODERMA Wiegmann 



Trachyderma Wiegmann (nee Latreille), Isis von Oken, vol. 22, 1829, p. 421 (type, 



Trachyderma horridum Wiegmann). 

 Heloderma Weigmann, Isis von Oken, vol. 22, 1829, p. 624. 



'» Gymnodactylus sumichrasti Qadow, Proc. Zool. Soc. London, 1905, p. 211, from the Isthmus of Tehuan- 

 tepec, appears to be a lapsus for this species. 



