tretched in the open clearing between two
cabins.

Artibeus lituratus palmarum J.A. Allen and Chapman.--Nonpregnant female
No. 45086 taken on evening of April 7, weighed 68.0 grams. No. 401 of
Jackson taken on May 6 weighed 53.5 grams and contained one embryo 12
mm. long; his No. 409 taken on May 10 weighed 53.7 grams and contained
one embryo 15 mm. long.

Enders (_op. cit._:418) took specimens of _Artibeus jamaicensis
jamaicensis_ in Panama and possibly on Barro Colorado Island; he is not
specific as to locality.

Artibeus cinereus watsoni Thomas.--Male No. 45087 on April 8; weight
13.6 grams. Ingles (Jour. Mamm., 34:267, May, 1953) records the finding
of as many as three of these bats on the Island in a "tent" that the
bats had made of a frond of the palm, _Geonoma decurrens_.

Thyroptera tricolor albigula G.M. Allen.--On May 10 along the
Snyder-Molino Trail 50 meters from its beginning Dr. E.R. Dunn found in
a curled _Heliaconia_ leaf a group of four bats of this species. A
lactating female (No. 405 of Jackson), a young male (No. 406 of
Jackson) attached to its mother's teat, and a male (No. 407 of Jackson,
now 52457 K.U.) weighed, respectively, 4.8, 2.2, and 4.0 grams. The
young one remained attached to the mother when she flew about the
laboratory. The fourth specimen, a male, was banded and released. These
bats with the aid of suction cups on their wrists and ankles hung head
up in the rolled leaf and on places in the laboratory on which they
alighted. This species was previously recorded (see Enders, _op.
cit._:421) from Barro Colorado Island, on the basis of other specimens
also captured by Professor Dunn.

Myotis nigricans nigricans (Schinz).--Nos. 45089-45091 and No. 408 of
Jackson. Nos. 45090 and 45091 were plucked from under the eaves of
buildings, but No. 45089 was caught in the net on the evening of April
5. Jackson found this species to roost between the corrugations of the
metal roof and the underlying wooden supports. He banded 14 individuals,
most of which were pulled with forceps from their resting places in the
old laboratory or the kitchen. All were males. Five were recaptured from
one to 13 days after banding, and two were found in the places from
which they originally had been plucked 13 days previously. Enders (_op.
cit._:421) found this species to be abundant about the laboratory where
it spent the day hanging under the eaves.

Molossus coibensis J.A. Allen.--Males Nos. 45092 and 45093 we