162 BULLETIN 18 7, UNITED STATES NATIONAL MUSEUM 



THAMNOPHIS EQUES EQUES (Reuss) 



<:ioluber eques Reuss, Zool. Misc., 1834, pp. 152-155, pi. 8, fig. 2. 



Thamnophis eques eques Gloyd and Smith, Bull. Chicago Acad. Sci., vol. 6, 1942, 



p. 234.— Smith, Zoologica, vol. 27, 1942, pp. 106-108. 

 'Thamnophis cyrtopsis cycUdes Copk, Proc. Acad. Nat. Sci. Philadelphia, vol. 13, 



1861, pp. 229-230 (type locality iinl5:nown, "Cape St. Lucas"; type, U.S.N.M. 



No. 5023). 

 Eutaenia pulchrilatus Cope, Proc. Amer. Philos. Soc, vol. 22, 18S4 (1885), p. 174 



(type locality, Guanajuato ; type, U.S.N.M. No. 9899). 



Tyjje. — Senckenberg Miis. No. 7209. 



Type locality. — Mexico. 



Range. — Southern Sinaloa and central Durango southward to the 

 edge of the plateau in Michoacan, west to Hidalgo and central Vera- 

 cruz; highlands of central Oaxaca and the Sierra Madre del Sur in 

 central Guerrero (known from the states of Durango, Guanajuato, 

 Guerrero, Hildalgo, Jalisco, Mexico, Michoacan, Morelos, Oaxaca, 

 Puebla, Sinaloa, Veracruz, Zacatecas, and from Distrito Federal). 



THAMNOPHIS EQUES CYRTOPSIS (Kennicott) 



Eutaenia cyrtopsis Kennicott, Proc. Acad. Nat. Sci. Philadelphia, vol. 12, 1860, 



pp. 333-334. 

 Thamnophis eques cyrtopsis Gloyd and Smith, Bull. Chicago Acad. Sci., vol. 6, 



1942, p. 234.— Smith, Zoologica, vol. 27, 1942, p. 108. 

 Eutaenia eqives Ditmars, Reptile book, 1907, p. 230, pi. 66, fig. 8, and pi. 71, 



fig. 1. 

 Thamnophis eques Schmidt and Davis, Field book of snakes, 1941, pp. 240-241, 



fig. 78 (liead and neck only). 



Type.— U.S.N.M. No. 8067. 



Type locality. — Rinconada, Coahuila. 



Range. — Utah and Arizona southward through Sonora (except ex- 

 treme western part) and central Coahuila to northern Durango and 

 southern San Luis Potosi; southward along the Sierra Madre Occi- 

 dental to northern Nayarit (recorded in Mexico from the states of 

 Chihuahua, Coahuila, Durango, Nayarit, San Luis Potosi, and 

 Sonora). 



THAMNOPHIS EQUES POSTREMUS Smith 



Thamnophis eques postrenms Smith, Zoologica, vol. 27, 1942, pp. 109-110. 



Type.—E. H. Taylor-H. M. Smith Coll. No. 5275. 

 Type locality. — El Sabino, Michoacan. 



Range. — Known only from the type locality, Uruapan, and Apat- 

 zingan, Michoacan. 



THAMNOPHIS HAMMONDII (Kennicott) 



Eutaenia hammondii Kennicott, Proc. Acad. Nat. Sci. Philadelphia, vol. 12, 

 1860, p. 332. 



