170 BULLETIN 19 9, UNITED STATES NATIONAL MUSEUM 



Family ANELYTROPSIDAE Cope 



Anelytropsidae Cope, Proc. Acad. Nat. Sci. Philadelphia, 1864, p. 228; Ann. 

 Rep. U. S. Nat. Mus. for 1898 (1900), p. 665. 



Genera. — A single genus, Anelytropsis Cope, is known. 

 Range. — Foothills of the plateau in central eastern Mexico. 



Genus ANELYTROPSIS Cope 



Attelytropsis Cope, Proc. Amer. Philos. See, vol. 22, 1885, p. 380; Ann. Rep, 

 U. S. Nat. Mus. for 1898 (1900), p. 667. 



Genotype. — Anelytropsis papillosus Cope. 

 Bange. — Central eastern part of Mexico. 

 Species. — One. 



ANELYTROPSIS PAPILLOSUS Cope 



Anelytropsis papillosus Cope, Proc. Amer. Philos. Soc, vol. 22, 1885, pp. 380-381, 

 pi. (unnumbered), fig. 9 (opposite p. 184). — Smith, Univ. Kansas Sci. Bull., 

 vol. 22, 1935, p. 146, pi. 24, figs. 2, 3. 



Type. — Unknown; originally two cotype specimens. 



Type locality. — Near Jalapa, Veracruz. 



Range. — Eastern San Luis Potosi and eastern central Veracruz. 

 Reported from San Luis Potosi: 20 miles south of Valles; Veracruz: 

 Jalapa, Motzorongo. 



Family TEIIDAE Gray 



Teiidae Gray, Philos. Mag., ser, 2, vol. 2, 1827, p. 55. 



Genera. — About 40 genera, 3 of which, Cnemidophorus, Ameiva, 

 and Gymnophthalmus, occur in Mexico. 



KEY TO MEXICAN GENERA OF TEIIDAE 



1. Anterior nasal plates not separated by a frontonasal; frontoparietal present; 



inner finger well developed; scales granular; eyelids present 2 



Nasal plates widely separated by a frontonasal; inner finger absent; no eyelids; 

 scales cycloid, quincuncial; prefrontals present but no frontoparietals. 



Gymnophthalmus (p. 192) 



2. Central gular scales not or scarcely enlarged as compared with adjacent lateral 



scales; tongue somewhat widened posteriorly, and notched behind; no basal 



sheath between base of tongue and larynx Cnemidophorus (p. 174) 



Central gular scales enlarged, often abruptly so; tongue not, or less widened 

 posteriorly, a basal sheath evident between the base of tongue and larynx. 



Ameiva (p. 170) 

 Genus AMEIVA Meyer 



Ameiva Meyer, Synopsis reptilium . . . sistema generum methodum . . ., 

 1795, p. 27. 



Genotype. — Lacerta americana Seba [=Ameiva ameiva (Linnaeus)]. 

 Range. — Tamaulipas and Jalisco to Brazil; West Indies. 

 Species. — About 13, with some 28 forms. Two species with 11 

 subspecies occur in Mexico. 



