r Ridgway, Color Standards and Color Nomenclature, Washington,
D. C., 1912), underparts Smoke Gray; skull large and broad.

_Comparisons._--From _Leptonycteris nivalis nivalis_ (specimens
from Veracruz, Oaxaca, Distrito Federal, Hidalgo, Jalisco, and
Sonora), _L. n. longala_ differs as follows: color paler, more
whitish and less brownish; third finger longer (_longala_ from
Coahuila averaging 111.3 mm.; _nivalis_ from Sonora averaging 91.0,
from Jalisco 96.4, from Hidalgo 98.0, from Veracruz 100.0, from
Distrito Federal 100.2, and from Oaxaca 98.6); skull larger,
breadth of cranium greater (_longala_ from Coahuila averaging 10.7
mm.; _nivalis_ from Sonora 9.8, from Jalisco 9.8, from Hidalgo 9.6,
from Veracruz 9.9, from Distrito Federal 9.9, and from Oaxaca 9.8);
mastoidal breadth greater (_longala_ from Coahuila averaging 11.6
mm.; _nivalis_ from Sonora 10.5, from Jalisco 10.8, from Hidalgo
10.6, from Veracruz 10.9, from Distrito Federal 10.8, and from
Oaxaca 10.7); skull higher (_longala_ from Coahuila averaging 10.0
mm.; _nivalis_ from Sonora 9.3, from Jalisco 9.2, from Hidalgo 9.2,
from Veracruz 9.3, from Distrito Federal 9.3, and from Oaxaca 9.1).
The average of each dimension of _longala_ listed above exceeds the
maximum of the corresponding dimension in _nivalis_.

_Remarks._--_Leptonycteris nivalis longala_ inhabits the
northeastern end of the Mexican Plateau. Bats from Brewster County,
Texas, referred to _longala_, average slightly larger in all
measurements taken than do specimens from southern Coahuila.
Specimens from Cerro Potosi, Municipio de Galeana, Nuevo Leon, also
are referred to _longala_ on the basis of the length of their third
fingers. Like the specimens from Texas, these bats possess longer
forearms, on the average, than do bats from Coahuila.

Topotypes of _L. n. nivalis_ from Mount Orizaba were not available,
but 111 specimens referable to the subspecies _nivalis_ were
examined. These specimens were from the following places: _Sonora_:
1/4 mi. W Aduana, 1600 ft., 4 specimens. _Jalisco_: Hda. San
Martin, 5000 ft., 18 mi. W Chapala, 3; 11 mi. W Chapala, 5000 ft.,
1; 5 mi. W Chapala, 5000 ft., 58; 8 mi. NE Ocotlan, 5100 ft., 1.
_Hidalgo_: 6 km. NW Tasquillo, 500 ft., 1. _Veracruz_: 3 km. W Boca
del Rio, 25 ft., 22. _Distrito Fe