CHECKLIST OF THE SNAKES OF MEXICO 147 



Range. — Pacific slopes from Guerrero northward to Colima (re- 

 corded from the states of Guerrero, Michoacan, and Colima). 



TRIMORPHODON COLLARIS Cope 



Trimorphodon collaris Copk, Journ. Acad. Nat. Sci. Philadelphia, ser. 2, vol. 8, 

 1876, p. 131.— Smith, Proc. U. S. Nat, Mus., vol. 91, 1941, pp. 165-166, map 

 fig. 38. 



Trimorphodon upsilon coUaris Mocqtjard, Mission scientifique au Mexique et 

 dans I'Amerique centrale, Rept., livr. 16, 1908, pi. 74, fig. 2 (?). 



Type.—U.S.^M. No. 26499. 



Type locality. — Tuxpango, near Orizaba, Veracruz. 



Range. — luiown only from the type locality. 



TRIMORPHODON FASCIOLATA Smith 



Trimorphodon fasciolata Smith, Proc. U. S. Nat. Mus., vol. 91, 1941, pp. 160-162, 

 map fig. 38. 



Type.—U.S.l!i.M. No. 110400. 



Type locality. — Zararacua Falls, Uruapan, Michoacan. 

 Range. — Known only from the type locality and Apatzingan, Micho- 

 acan. Probably ranges from Nayarit to eastern Michoacan. 



TRIMORPHODON FORBESI Smith 



Trimorphodon forbesi Smith, Proc. U. S. Nat. Mus., vol. 91, 1941, pp. 163-165, 

 map fig. 38. 



Type.— \J.S.^.M. No. 110402. 



Type locality. — San Diego, Tehuacan, Puebla. 



Range. — Known only from the type locality but probably occurs 

 throughout most of the upper basin of the Rio Balsas in extreme 

 southern Puebla and northern Oaxaca. 



TRIMORPHODON LAMBDA Cope 



Trimorphodon Jamlda Cope, Proc. Amer. Philos. Soc, vol. 23, 1886, pp. 286-287. — 

 Taylor, Univ. Kansas Sci. Bull., vol. 25, 1938 (1939), pp. 300-861, pi. 35, 

 fig. 4.— Smith, Proc. U. S. Nat. Mus., vol. 91, 1941, pp. 155-156, map fig. 38. 



r?/;?e.— U.S.N.M. No. 13487. 



Type locality. — Guaymas, Sonora. 



Range. — Sonora northward to southern Nevada, eastern California, 

 and southw^estern Utah (known in Mexico only from the state of 

 Sonora). 



TRIMORPHODON LATIFASCIA Peters 



Trimorphodon tisciitata latifascia Peters, Monatsb. Akad. Wiss. Berlin, 1869, 



p. 877. 

 Trimorphodon latifascia Taylor, Univ. Kansas Sci. Bull., vol. 25, 1938 (1939),- 



pp. 364-365, pi. 36, fig. 2; vol. 26, 1939 (1940), p. 479, pi. 52.— Smith, Proc, 



U. S. Nat. Mus., vol. 91, 1941, p. 160, map fig. 38. 



Type. — Berlin Mus. 



