132 BULLETIN 18 7, UNITED STATES NATIONAL MUSEUM 



Genus STENORRHINA Dumeril 



StenorrMna Dumeril, M^m. Acad. Inst. France, vol. 23, 1853, p. 490. 

 Stenorhma Dumeril, Bibeon, and Dumeril, Erpetologie generale, vol. 7, pt. 2, 



1854, p. 154 (emendation of StenorrMna). 

 Bergenia Steindachnee, Reise de osterreichischen Fregatte Novara, Eept., 1867, 



pp. 92-93 (type, B. mexicana Steindachner). 



Genotype. — Stenorr'hina ventralis Dumeril. 



Range. — Central Veracruz and central Guerrero southward into 

 South America. 



Species. — Four species and subspecies occur in Mexico ; at least two 

 are extralimital. 



KEY TO MEXICAN FORMS OF STENORRHINA 



1. Belly pigmented ; no indication of a black temporal stripe ; rarely a loreal, 



prefrontals usually in contact vi'ith labials or narrowly separated from 



them ; young spotted degenhardtii mexicana 



Belly white, rarely pigmented a little; a black temporal stripe at least 

 indicated ; a loreal or not, but prefrontals always broadly separated 

 from labials ; young colored like the adults, unspotted 2 



2. Ground color red ; scales not black at base ; a middorsal stripe evident or 



not ; rarely any indication of dorsolateral dark stripes freminvillii lactea 



Ground color gray ; usually five distinct dark lines, or scales dark at 

 bases 3 



3. Five lines, all generally distinct freminvillii freminvillii 



No lines ; bases of scales distinctly black freminvillii apiata 



STENORRHINA DEGENHARDTII MEXICANA (Steindachner) 



Bergenia mexicana Steindachnee, Reise der osterreichischen Fregatte Novara, 



1S67, pp. 92-93, fig. — . 

 Stenorhina mexicana Taylor, Univ. Kansas Sci. Bull., vol. 27, 1941, pp. 122-124, 



fig. 3. 

 Stenorhina degenhardtii mexicana Smith, Proc. U. S. Nat. Mus., vol. 93, 1943, p. 



472. 



Type. — Uncertain. 



Type locality. — Mexico. 



Range. — Central Veracruz southward to the Isthmus of Te- 

 huantepec (known from several localities in central Veracruz ; a record 

 from "Coatzacoalcos River" may be referable to this species). 



STENORRHINA FREMINVILLII FREMINVILLII Dnmeril, Bibron, and Dumeril 



Stenorhina Freminvillii Dumeril, Bibeon, and Dumeril, Erpetologie g^n^rale, 



vol. 7, pt. 2, 1854, pp. 868-869, pi. 70, figs. 1-2. 

 Stenorhina freminvillii freminvillii Smith, Proc. U. S. Nat. Mus., vol. 93, 1943, 



p. 472. 

 Microphis quingneliniatus [sic] Haixowell, Proc. Acad. Nat. Sci. Philadelphia, 



vol. 7, 1854 (1855), p. 97 (type locality, Honduras; types, Acad. Nat. Sci. 



Phila. No. 5753-4). 

 Stenorhina Degenhnrdti quinquelineata Jan, Arch. Zool. Anat. Fis., vol. 2, 1862, 



pp. 55, 65 (type locality, Mexico and Central America; type in Copenhagen 



