140 BULLETIN 187, UNITED STATES NATIONAL MUSEUM 



Range. — The peninsula of Yucatan to Peten, Guatemala (known 

 in Mexico from Cliichen Itza and Mayapan, Yucatan) . 



TANTILLA MORGANI Hartweg 



Tantilla morgani Haktweg, Occ. Pap. Mus. Zool. Univ. Michigan, No. 486, 1944, 

 pp. 5-7. 

 Type.—MviS. Zool. Univ. Michigan No. 85968. 

 Type locality. — Necaxa, Puebla. 

 Range. — Ivnown only from the type locality. 



TANTILLA NIGRICEPS NIGRICEPS Eennicott 



Tantilla nigriceps Kennicott, Proc. Acad. Nat. Sci. Philadelphia, vol. 12, 1860, 

 p. 328.— Blanchaed, Publ. Field Mus. Nat. Hist., zool. ser., vol. 20, 1938, 

 pp. 373, 375, 376.— Schmidt and Smith, ihid., vol. 29, 1944, p. 94. 



Tantilla nigriceps nigriceps Smith, Copeia, 1938, No. 3, p. 150; Zoologica, vol. 27, 

 1942, p. 38. 



Type.— {J.S.^.M. Nos. 2040, 4491, two cotypes. 



Type locality. — Indianola to Nueces, Tex., and Fort Bliss, "New 

 Mexico" (Tex.). 



Range. — Central Kansas and southeastern Missouri south through 

 western Texas, New Mexico, northern Chihuahua, and perhaps ex- 

 treme northeastern Sonora and northwestern Coahuila (recorded in 

 Mexico only from Progreso, ChihitahiM) . 



TANTILLA NIGRICEPS FUMICEPS (Cope) 



Scolecophis fumiceps Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. 12, 1860 (1861), 



p. 371. 

 Tantilla nigriceps fumiceps Smith, Copeia, 1941, No. 2, p. 112; Zoologica, vol. 



27, 1942, pp. 38-39. 

 Tantilla kirnia Blanchaed, Publ. Field Mus. Nat. Hist., zool. ser., vol. 20, 1938, 



pp. 373-374 (type locality, 9 miles east of Pleasauton, Atascosa County, Tex.; 



type. Field Mus. Nat. Hist. No. 28102). 

 Tantilla nigriceps kirnia Smith, Copeia, 1938, No. 3, p. 150. 



Type.— U.S.N.M. No. 12135. 



Type locality. — "Probably Cuba," in error; restricted to that of 

 T. kirnia. 



Range. — Southern Oklahoma southward through central Texas into 

 northern Tamaulipas (recorded in Mexico only from Mier, Tamau- 

 lipas) . 



TANTILLA PHRENITICA Smith 



Tantilla phrenitica Smith, Zoologica, vol. 27, 1942, p. 39. 



Type.— {J.S.N. M. No. 110381. 



Type locality. — Cuautlapan, Veracruz. 



Range. — Central Veracruz southward in the Atlantic foothills to 

 Guatemala, apparently avoiding the Yucatan Peninsula (known from 

 the type locality and El Limon Totalco, Veracruz, and Totontepec, 

 Oaxaca). 



