ool. ser., 20:39, December 11, 1933.

El Sabino (2); Lombardia.

This species ranges throughout the Balsas-Tepalcatepec Basin westward
into Colima; specimens from Michoacan were collected in arid scrub
forest at elevations from 500 to 1050 meters. The limited observations
on _Micrurus distans michoacanensis_ and _M. laticollaris_ indicate
that, at least in the Tepalcatepec Valley, _M. laticollaris_ seems to
inhabit slightly more mesic areas than does _M. distans michoacanensis_.

~Pelamis platurus~ (Linnaeus)

_Anguis platura_ Linnaeus, Systema naturae, ed. 12, 1:391,
1766.--Pine Island, Pacific Ocean.

_Pelamis platurus_, Gray, Ann. Philos., p. 15, 1825.

Boca de Apiza.

In November, 1955, Alfonzo Gonzales, a geographer from the University of
Texas, observed sea snakes on the beaches of Michoacan. In May, 1956,
Donald D. Brand of the University of Texas gave me one specimen of
_Pelamis platurus_ that he obtained on March 2, 1956, at Boca de Apiza.
Furthermore, he supplied me with the following observations based on his
field work along the coast of Michoacan from the Rio Coahuayana to
Maruata from March 1, to April 15, 1956. At that time many sea snakes
were observed; in some places living and dead individuals were seen on
the beaches; innumerable snakes were seen in the surf. When live
individuals were taken from the beach and thrown into the ocean, they
usually swam to shore. Many partially eaten individuals were seen
protruding from crab holes. Inquiries among the natives resulted in the
following information: Sea snakes are frequently seen between November
and April, but most commonly in March and April, at which time the water
is cold. The natives referred to the sea snakes as "culebra del mar."
Most natives said that the snakes were not poisonous; others did not
know of any venomous properties. In May, 1956, I worked the coastal
region from the Rio Coahuayana to La Placita and saw no sea snakes. In
the summer of 1950 James A. Peters, and in the summer of 1951 I worked
nearly the entire coastal region of Michoacan; during that time no
_Pelamis_ were seen. Insofar as I know, this is the first report of such
seasonal activity in _Pelamis platurus_ in the Americas.

~Agkistrodon bilineatus bilineatus~ Guenther

_Ancisdrodon bilineatus_ Guenther, Ann. Mag. Nat. Hist., ser.
3, 12:364, 1863.--Pacific coast of Guatemala.

_Agkistrodon bilineatus bilineatus_, Burger a