na was an
heretofore unnamed subspecies. It may be known as

=Myotis velifer brevis= new subspecies

_Myotis velifer_, Grinnell, Univ. California Publ. Zool.,
12:266, March 20, 1914; Grinnell, H. W., Univ. California Publ.
Zool., 12:259, January 31, 1918.

_Myotis velifer velifer_, Miller and Allen, Bull. U. S. Nat. Mus.,
144:87, May 25, 1928; Burt, Jour. Mamm., 14:115, May 15, 1933;
Burt, Misc. Publ. Mus. Zool. Univ. Michigan, 39:22, February 14,
1938; Hatfield, Bull. Chicago Acad. Sci., 6:146, January 12, 1942.

_Type._--Male, adult, No. 22631, Museum of Natural History,
University of Kansas; Madera Canyon, 5,000 ft., Santa Rita
Mountains, Pima County, Arizona; obtained on March 12, 1948, by J.
R. Alcorn; original number 5571.

_Range._--Lower Colorado River Valley in California and Arizona,
through southern two-thirds of Arizona, southwestern New Mexico,
and northern Sonora; southern limits of range unknown.

_Diagnosis._--Size small (see measurements). Color pale, upper
parts being near (16"_j_) Snuff Brown (capitalized color terms are
of Ridgeway, Color Standards and Color Nomenclature, Washington, D.
C, 1912); underparts dull Pinkish Buff to nearly white in some
specimens; ears and flight membranes near (16"_l_) Olive Brown;
skull small.

_Comparisons._--From _Myotis velifer incautus_ (J. A. Allen),
_Myotis velifer brevis_ differs in: Size smaller; color slightly
darker; skull smaller. From _Myotis velifer peninsularis_ Miller,
_M. v. brevis_ differs in: Size larger; color darker; skull larger.
From _Myotis velifer velifer_ (J. A. Allen), _M. v. brevis_ differs
in; Size smaller; pelage paler, with less extensive basal dark
portion; skull smaller.

TABLE 1.--MEASUREMENTS, IN MILLIMETERS, OF MYOTIS VELIFER

============================================================================
| Sex | Number | Average | Range
| | averaged | |
----------------------+-----------+----------+---------+--------------------
_M. v. velifer_, 4 km. E Las Vigas, 8,500 ft., Veracruz, Mexico.
----------------------+-----------+----------+---------+--------------------
Total length | [Male] | 15 | 97.1 | 92.0-101.0
" " | [Female] | 9 | 99.0 | 93.0-103.0
Length of