Distribution. — Low, moderate, and intermediate elevations of the Pacific versant from 

 Sinaloa to Guerrero and Morelos, including the Tres Marias Islands. An unconfirmed record 

 exists for Tezuitlan, Puebla, Mexico. The type locality is, most likely, in error. 



Systematic references. — Wilson and Meyer (1981); Wilson (1988c). 



Tantilla capistrata Cope 

 Tantilla capistrata Cope, 1876: 181. 



Holotype. — Academy of Natural Sciences of Philadelphia (ANSP) 1 1581, juvenile female, 

 collected by James Orton, date of collection unknown. 



Type-locality. — Valley of Jequetepeque, Depto. La Libertad, Peru. 



Distribution. — Low to intermediate elevations of nortwestem coastal Peru and the valleys 

 of the upper Rio Maraiion, Rio Chincipe, and Rio Chamaya, as well as the provinces of El Oro 

 and Loja in extreme southern Ecuador. 



Systematic references. — Wilson and Mena (1980); Wilson (1987a, 1990a); Perez-Santos 

 and Moreno (1991). 



Tantilla cascadae Wilson and Meyer 

 Tantilla cascadaeWihomndMtytx, 1981: 13. 



Holotype. — American Museum of Natural History (AMNH) 107389, female, collected in 

 June, 1939byD.F. Brand. 



Type-locality. — Tzararacua Falls (= Cascada la Tzararacua), S of Uruapan (10.5 km 

 south, according to Duellman, 1961), Michoacan, Mexico, collected by D. F. Brand in June, 

 1939. 



Distribution. — Known only from the type locality. 



Systematic references. — Wilson and Meyer (1981); Wilson (1988d). 



Remarks. — This species remains known from but a single specimen. 



Tantilla coronadoi Hartweg 

 Tantilla coronadoi Hartweg, 1944: 4. 



Holotype. — University of Michigan Museum of Zoology (UMMZ) 85697, female, 

 collected by Wilmot W. Brown, date of collection unknown. 



Type-locality. — vicinity of Chilpancingo, Guerrero, Mexico. 



Distribution. — Moderate and intermediate elevations of the Pacific versant in central 

 Guerrero, Mexico. 



Systematic references. — Wilson and Meyer (1981); Wilson (1990b). 



Tantilla coronata Baird and Girard 

 Tantilla coronata Baird and Girard, 1853: 131. 

 Homalocranium wagfieri Jan, 1862: 51. 

 Tantilla coronata mitrifer Schwartz, 1953: 153, 



Holotype. — National Museum of Natural History (USNM) 1875 (according to Cochran, 

 1961), adult female collected by D. C. Lloyd, date of collection unknown. 



