have been assigned to
subspecific rank without justification.

In Michoacan this species is found from sea level to 1350 meters in the
Sierra de Coalcoman and to 1300 meters at La Palma on Lago de Chapala.
It has been collected in scrub forest, semi-deciduous broad-leafed
forest, and oak forest.

~Drymobius margaritiferus fistulosus~ Smith

_Drymobius margaritiferus fistulosus_ Smith, Proc. U. S.
Natl. Mus., 92:383, November 5, 1942.--Miramar, Nayarit,
Mexico.

Apatzingan (3); Coahuayana; Coalcoman (3); El Sabino (3); El
Ticuiz; 12 km. S of Tzitzio.

This snake is abundant in the lowlands of the state; the few specimens
listed above are indicative not of the rarity, but rather of the speed
and agility, of this diurnal snake. It most frequently is found near
water, where there is a dense growth of vegetation. One individual was
observed in a large pool inhabited by several small _Rana pipiens_, and
another was seen along the bank of a hyacinth-choked river channel. A
third individual was captured while it was in pursuit of a
_Cnemidophorus_.

This species has been collected on the coastal lowlands and seaward
foothills of the Sierra de Coalcoman and in the Tepalcatepec Valley to
elevations of 1150 meters.

~Elaphe triaspis intermedia~ (Boettger)

_Pityophis intermedius_ Boettger, Ber. Offen. Vereins.
Naturk., 22:148, 1883.--Mexico. Type locality restricted to
Hacienda El Sabino, Michoacan, Mexico, by Dowling (1960:74).

_Elaphe triaspis intermedia_, Mertens and Dowling,
Senckenbergiana, 33:201, November 15, 1952.

Twenty-four km. E of Apatzingan; Chupio; El Sabino (4); 11
km. E of Emiliano Zapata.

Dowling (1960) has shown that specimens from the Balsas-Tepalcatepec
Basin have fewer ventrals and caudals than those from the Sierra del Sur
or the coast. All specimens from Michoacan were collected in open
forest, either scrub or oak forest. They were found in drier situations
than those described for the species in southern Tamaulipas by Martin
(1958:69). In Michoacan _Elaphe triaspis intermedia_ is known from the
Tepalcatepec Valley, the lower slopes of the Cordillera Volcanica, and
the western edge of the Mexican Plateau at an elevation of 1350 meters.
It probably occurs in the lower parts of the Sierra de Coalcoman and
along the Pacific coast, for it is known from the coastal lowlands of
Guerrero and Colima. In August, 1951, I saw a snake tha