_ 1-1/2 mi. SW of Tocuina is of
unusual interest.

The published record of _Sturnira lilium_ nearest to Tocuina is from 2
mi. N Ciudad Guzman (19 deg.43', 103 deg.28'), Jalisco, and the nearest
published record of the genus _Chiroderma_ is of _Chiroderma isthmicum_
from Presidio (18 deg.37', 96 deg.47'), Veracruz (Hall and Kelson, 1959:126,
134). The Chihuahuan specimens extend the known range of _Sturnira
lilium_ approximately 585 miles northwestward and that of the genus
_Chiroderma_ approximately 920 miles northwestward from the localities
noted above. Five specimens (79434-79438) of _Sturnira lilium_, two
adults and three immature individuals, were taken from July 18 to July
22, 1958, by the author and Kenneth E. Shain, as also were the two
(79439-79440) _Chiroderma_.

To the list given by Koopman and Martin (1959:9) of neotropical genera
known to range farther north on the west coast of North America than on
the east coast there can now be added _Artibeus_, _Sturnira_ and
_Chiroderma_ (as noted above), _Anoura_, _Choeronycteris_ and
_Leptonycteris_ (Hall and Kelson, 1959:119, 120, 122; Hoffmeister,
1959:18), and _Liomys_ (Hall and Kelson, 1959:536).

In view of these additional genera, and others that almost certainly
remain to be discovered farther north on the west coast, the suggestion
by Koopman and Martin (1959:11) that species inhabiting humid tropical
habitats, in general extend farther north on the east coast of Mexico
than on the west coast may need to be reconsidered. On the west coast,
areas of more humid tropical vegetation and climate are more distant
from the coastline as one proceeds northwestward from Nayarit to
Sonora. The broad band of humid tropical vegetation along the coast is
progressively reduced in width, and crowded back against the mountains,
and still farther north consists of only small scattered remnants that
are difficult to visit, in the bottoms of deep canyons.

LITERATURE CITED

COCKRUM, E. L.

1955. Reproduction in North American Bats. Trans. Kansas Acad. Sci.,
58:487-511.

DALQUEST, W. W.

1953. Mexican bats of the genus _Artibeus_. Proc. Biol. Soc.
Washington, 66:61-66.

DAVIS, W. B.

1958. Review of Mexican bats of the Artibeus "cinereus" complex.
Proc. Biol. Soc. Washington, 71:163-166, 1 fig. in text.

HALL, E. R., and KELSON, K. R.

1959. The mammals of North America. The Ronald Press, N. Y., Vol.
I, xxx + 1-546 + 1-79 pp., 312 figs.