310 



REPTILIA: SERPENTES: COLUBRIDAE * * TRIMORPHODON 



TRIMORPHODON Cope 



1861 Tr imorphodon Cope, Proc. Acad. Nat. Sci. Phila., 1861: 257- Type-species: Lycodon lyrophanes 



Cope. 

 1863 Ete irod ipsas Jan, Elenco Sist. Ofidi: 10$. Type-species: Not indicated. 

 1901 Hetaerodi psas Berg (emendation of Ete irodipsas Jan), Comun. Mus. Buenos Aires, 1: 25O. 



Distribution: Southwestern United States through Central America to Costa Rica. 



Content: Eleven species, all but one of which are ex tral i m i tal. 



TRIMORPHODON BISCUTATUS (Dumeril and Bibron) 



I854 Pi psas b i-scutata Dumeril and Bibron, Erp. Gen., 7: II53. Type-locality: "Mexico". 

 1861 Trimorphodon biscutatus — Cope, Proc. Acad. Nat. Sci. Phila., I86I: 257. 



Distribution: Pacific slope from Colima, Mexico, to Costa Rica. 



Content: Two subspecies, one of which ( b i scutatus Dumeril and Bibron) is extral im i tal. 



Tr imorphodon b i scutatus quadruplex Sm i th 



19"! Tr imorphodon b i scutatus quadruplex Smith, Proc. U.S. Nat. Mus., Jl: I57. Type-locality: 

 Estel i , N icaragua . 



Distribution: Low and moderate elevations of Pacific slope, Guatemala to Costa Rica. 



