l snake is an inhabitant of the coniferous forests and the
pine-oak forests on the Cordillera Volcanica. Data on the series from
between Zitacuaro and the Rio Tuxpan were given by Taylor (1940c:481).

~Tantilla calamarina~ Cope

_Tantilla calamarina_ Cope, Proc. Acad. Nat. Sci.
Philadelphia, 18:320, February 13, 1867.--Guadalajara,
Jalisco, Mexico.

Apatzingan; La Placita.

Although this snake has been collected at high elevations along the rim
of the Mexican Plateau in Nayarit, Jalisco, Mexico, and Puebla, the
specimens from Michoacan are from arid scrub forest at elevations of
less than 400 meters. The species has been found in similar habitats in
Colima (Oliver, 1937:24) and in Sinaloa and the Tres Marias Islands
(Zweifel, 1960:110).

~Toluca lineata lineata~ Kennicott

_Toluca lineata_ Kennicott, _in_ Baird, Report on the United
States and Mexican boundary survey, 2, Reptiles, p. 23,
1859.--Valley of Mexico.

_Toluca lineata lineata_, Taylor and Smith, Univ. Kansas
Sci. Bull., 28:343, May 15, 1942.

Capacuaro; Carapan (12); Cheran (23); Cojumatlan; Los Reyes;
Morelia (2); Nahuatzen; Paracho (10); Patzcuaro (17);
Uruapan (2).

This small snake is an inhabitant of the coniferous forests between
elevations of about 1550 and 2800 meters. Not infrequently, individuals
have been found in pine-oak forest within these elevations.

The generic status of _Toluca_ is unsettled. Taylor and Smith (1942b)
separated _Toluca_ from _Conopsis_ by the presence of enlarged and
grooved posterior maxillary teeth in _Toluca_ and their absence in
_Conopsis_. Bogert and Oliver (1945:378) suggested synonymizing _Toluca_
with _Conopsis_. Smith and Laufe (1945:12) defined the generic position
of _Toluca_. Actually, in deciding the generic position of these snakes,
five genera (_Ficimia_, _Gyalopion_, _Pseudoficimia_, _Conopsis_, and
_Toluca_) must be considered. Of these _Ficimia_ and _Gyalopion_ are
closely related; they have been placed in one genus by some workers.
_Pseudoficimia_ is intermediate between _Ficimia-Gyalopion_ and
_Toluca-Conopsis_. A workable definition of the supraspecific
classification of these snakes must await a thorough review of the
species.

~Trimorphodon biscutatus biscutatus~ (Dumeril, Bibron, and Dumeril)

_Dipsas biscutata_ Dumeril, Bibron, and Dumeril, Erpetologie
generale, 7 (pt. 2):1153, 1854.--Mexico. Type locality