,
respectively), whereas one obtained on 21 July evidenced no
reproductive activity. Richard K. LaVal currently is studying the
_Myotis nigricans_ complex; pending his revision our specimens are
tentatively assigned to _M. n. nigricans_.

Myotis simus riparius Handley, 1960

A male (USNM 52800) from the Escondido River above Bluefields,
originally reported by Miller and Allen (1928:203) as one of two _M.
albescens_ from that locality, provides the first record of the species
from Nicaragua and the northernmost from Middle America. The cranial
dimensions of this specimen, which compare well with those listed by
Handley (1960:467) for the Panamanian holotype and paratype, are:
greatest length of skull, 13.8 mm; zygomatic breadth, 8.9 mm;
postorbital constriction, 3.5 mm; breadth of braincase, 6.7 mm; mastoid
breadth, 7.4 mm; breadth across upper molars, 5.5 mm; length of
maxillary toothrow, 5.2 mm.

From Nicaraguan specimens of _albescens_, the skull of the specimen of
_simus_ examined (skin not seen) differs most conspicuously in having a
less inflated braincase, narrower postorbital region, and a distinct
sagittal crest.

Eptesicus furinalis gaumeri (J. A. Allen, 1897)

_Specimens._--_Carazo_: 3 km N, 4 km W Diriamba, 600 m, 7.
_Chinandega_: Potosi, 5 m, 1; 6.5 km N, 1 km E Cosigueina, 10 m, 1;
San Antonio, 35 m, 1. _Chontales_: 1 km N, 2.5 km W Villa Somoza,
330 m, 1; Hato Grande, 13 km S, 8 km W Juigalpa, 60 m, 3.

Davis (1965:234) reported two specimens of this species from Nicaragua,
one from Carazo (listed above) and the other from 1 mi SE Yalagueina,
2600 ft, Madriz. The only other specimen on record from Nicaragua is
from Greytown (Miller, 1897:100). Except for two individuals that were
shot as they foraged in early evening, our specimens were captured in
mist nets stretched over water or as described below.

Some of the bats captured northwest of Diriamba were taken in a net
placed across the center of a water-filled, concrete cistern that was
located in a large, open space used for drying coffee beans. Open at
the top, the cistern was approximately 12 m in diameter, and the water
level was approximately 3 m below the rim. Several _Artibeus
jamaicensis_, _A. lituratus_, and _Molossus pretiosus_ were caught in
the same net. Aside from bats removed from the net, a few _Eptesicus_
and _Molossus_ were retrieved from the water where they fell,
apparently stunned, after colliding with the