Sinaloa, Mexico, by Smith and Taylor (1950a:343).

_Masticophis striolatus striolatus_, Zweifel and Norris,
Amer. Midl. Nat., 54:242, July, 1955.

Apatzingan (4); Arteaga; Coalcoman (3); El Sabino;
Jiquilpan; La Palma; La Playa (3); Lombardia; Nueva Italia;
Rio Cachan; Santa Ana; Uruapan (2); Volcan Jorullo;
Ziracuaretiro.

This large diurnal species inhabits open scrub forest and cultivated
terrain from sea level to about 1650 meters. On the Mexican Plateau it
is known from the area around Lago de Chapala, to which it possibly
gained access through the valleys in the headwaters of the Tepalcatepec
drainage. Specimens from southern Michoacan have been reported
previously by Peters (1954:28) and Duellman (1954b:16) as _Masticophis
flagellum lineatus_.

~Masticophis taeniatus australis~ Smith

_Masticophis taeniatus australis_ Smith, Jour. Washington
Acad. Sci., 31:390, September 11, 1941.--Guanajuato,
Guanajuato, Mexico.

Tacicuaro (2); Zamora.

This species reaches the southern limit of its distribution in the state
of Michoacan. The limited ecological data available suggest that the
species inhabits the open mesquite grassland of the Mexican Plateau.

~Oxybelis aeneus auratus~ (Bell)

_Dryinus auratus_ Bell, Zool. Jour., 2:324, 1825.--Mexico.
Type locality restricted to Tehuantepec, Oaxaca, Mexico, by
Smith and Taylor (1950a:340).

_Oxybelis aeneus auratus_, Bogert and Oliver, Bull. Amer.
Mus. Nat. Hist., 83:381, March 30, 1945.

Coahuayana; El Sabino (4); between Las Tecatas and Las
Higuertas; between Los Pozos and La Cienega; Playa Azul;
Pomaro (2); between Pomaro and Maruata (2); Punto San Telmo;
Rio Tizupan.

On the basis of the number of specimens seen and collected on the
seaward slopes of the Sierra de Coalcoman, this is a common snake
there. Most specimens were collected in tropical semi-deciduous forest;
others were collected in oak forest to an elevation of 1700 meters.
Apparently _Oxybelis_ does not inhabit the lower parts of the
Tepalcatepec Valley; the only specimens from the inland area are four
from El Sabino, which is situated at about 900 meters on the slopes of
the Cordillera Volcanica. One individual was seen in gallery forest near
Limoncito at an elevation of 730 meters on the northern slopes of the
Sierra de Coalcoman.

~Pituophis deppei deppei~ (Dumeril)

_Elaphis deppei