92 BULLETIN 18 7, UNITED STATES NATIONAL MUSEUM 



Type locality. — Peten, Guatemala. 



Range. — Guerrero and Veracruz southward into Honduras (re- 

 corded in IMexico only from Teapa, Tahasco; Amula, Guerrero; 

 Motzorongo, Veracruz; and Colonia Santa Maria, Yucatan), 



Genus MANOLEPIS Cope 



Manolepis Cope, Proe. Amer. Philos. Soc, vol. 22, 1884 (1885), p. 176. 



Genotype. — Tomodon nasutus Cope. 



Range. — ^T\^estern Mexico from Nayarit to Tehuantepec. 



Species. — One. 



MANOLEPIS PUTNAMI (Jan) « 



Dromicus pntnami Jan, Elenco sistematico degli Ofldi, 1863, p. 67 (type locality, 

 San Bias, Nayarit ; type, Mus. Comp. Zool. No. 824) [a secondary homonym of 

 Dromicus putnamii (Cope, 1862) {Liophis putnamii Coi)e= Dromictis cursor 

 (Lacepede) ) ]. 



Tomodon nasutus Cope, Proe. Acad. Nat. Sci. Philadelphia, vol. 16, 1864, pp. 

 166-167 (type locality, Colima ; type, U.S.N.M. Nos. 31478-31479, two co- 

 types). 



Manolepis nasutus Cope, Proe. Amer. Philos. Soc, vol. 22, 1884 (1885), p. 176.— 

 Smith, Proe. U. S. Nat. Mus., vol. 93, 1943, pp. 445-446. 



Type.— Mus. Comp. Zool. No. 824. 



Type locality. — San Bias, Nayarit. 



Range. — The Pacific coast from Nayarit to the Isthmus of Tehuan- 

 tepec (recorded from several localities in the states of Colima, Guer- 

 rero, Jalisco, Nayarit, and Oaxaca). 



Genus MASTICOPHIS Baird and Girard 



Masticophis Baikd and GirAed, Catalogue of North American reptiles, 1853, p. 

 98. — Ortenburgek, Mem. Univ. Michigan Mus., vol. 1, 1928, pp. 1-166, figs. 

 1-32, pis. 1-26 (generic revision). — Smith, Journ. Washington Acad. Sci., vol. 

 81, 1941, pp. 388-398 (notes on Mexican species and their phylogeny). — 

 Ingek and Clark, Copeia, 1943, pp. 141-145. 



Genotype. — Masticophis orn/itus Baird and Girard. 



Range. — Southern United States south through Mexico and Cen- 

 tral America to northern South America. 



Species. — Nineteen species and subspecies, of which only three are 

 extralimital {ortenburgeti, f. -jiagellum., and m. suhorhitalis) . 



KEY TO MEXICAN FORMS OF MASTICOPHIS 



1. Scales in 15 rows 2 



Scales in 17 rows 6 



2. A distinct lateral light stripe involving edges of third and all or adjacent 



edges of fourth row at least in young 3 



No distinct lateral light stripe involving third and fourth rows in either 

 adults or young taeniatus ruthveni 



« Manolepis nasutus (Cope) to those who suppress secondary homonyms. 



