-----------+----+----+----+----+----+----+----+

[1] "Rt. 98" and "15 mi. S Waukenna" both in Jefferson Co.

[2] Only nine specimens.

[3] "N Island, Grand Lake, Iberville Parish."

[4] Some in Amer. Mus. Nat. History.

[5] Females, 8; males, 3; unsexed, 1.

[6] Only 11 specimens.

[7] 10 mi. W, 2 mi. S Piedra, Tamaulipas.

[8] 16 mi. W, 3 mi. S Piedra, Tamaulipas.

Lasiurus ega

Southern Yellow Bat

_Diagnosis._--Upper parts yellowish-brown (much as in _Lasiurus
intermedius floridanus_ from Louisiana) having overlay of grayish
or blackish anterior to shoulders; hair on basal half of
interfemoral membrane more yellowish than elsewhere; size medium
(forearm 42.7-52.2; condylocanine length 14.6-16.3).

This species occurs from the southwestern United States (Palm Springs,
California, and Tucson, Arizona) southward into Uruguay and
northeastern Argentina. Of the six currently (see Handley, 1960)
recognized subspecies of _L. ega_, four occur only in South America,
and two occur only in North America.

Cabrera (1958:115) regarded _Dasypterus ega fuscatus_ Thomas
(1901:246), based on three specimens from Rio Cauquete, Rio Cauca,
Colombia, as a synonym of _Dasypterus ega panamensis_ Thomas (_loc.
cit._) that was based on a specimen from Bogava, 250 meters elevation,
Chiriqui, Panama. The latter name has line priority over _fuscatus_.
Cabrera (1958:116) remarked that: "Las diferencias que Thomas senalo
entre el _Dasypterus_ de Panama y el de Colombia (_fuscatus_) nos
parecen estar dentro de los limites de la variacion individual, siendo
ademas muy raro que una especie de quiroptero este representada en
Colombia y en Panama por razas diferentes."

On July 16, 1958, at the British Museum of Natural History, one of us
(Hall) examined the holotypes of _panamensis_ and _fuscatus_, as well
as other materials used by Thomas, and readily perceived the
differences that he pointed out. Thomas' description, although terse,
is accurate. _L. e. fuscatus_ is much more blackish than _panamensis_.
We are inclined to retain the two names as applicable to two
subspecies. Whether or not _fuscatus_ is synonymized under
_panamensis_, the holotype of _panamensis_ is an intergrade between the
almost black Colombian animal (_fuscatus_) and the paler individuals in
Central America and territory north thereof. Even so, the holotype of
_panamensis_ more closely resemb