common to see several bats of this species, not in a cluster but with a few inches of space between any one bat and its neighbors, on the vertical screens that covered the airways beneath the eaves of the buildings. A colony was established in Zetek House (a trail-end house on the western side of the Island), and several individuals often were seen in the Tower House. As many as 50 individuals could be found at the Van Tyne Big Tree (Bombacopsis Fendleri) where they hung singly in the shaded inter-buttress spaces and on the exposed trunk sometimes up to a height of 100 feet. Occasionally several individuals would be seen in inter-buttress spaces of large trees on other parts of the Island. These bats were more alert during the daylight hours than were most other kinds of bats and could be approached and captured only with considerable difficulty. From the various colonies 13 females and 3 males were banded.

Noctilio leporinus mexicanus Goldman.—Seen in Wheeler Estuary by Enders (op. cit.:416) who uses the subspecific name N. l. leporinus. Goodwin (Bull. Amer. Mus. Nat. Hist., 79:121, May 29, 1942) later used the subspecific name N. l. mexicanus for this species in Panamá.

Micronycteris megalotis microtis Miller.—Enders (op. cit.:417) obtained specimens of this species from the underside of a fallen log and in a hollow tree at marker No. 23 on the Pearson Trail.

Phyllostomus discolor discolor Wagner.—Taken from a hollow tree by Enders (op. cit.:417).

Glossophaga soricina leachii (Gray).—No. 45073, April 5.

Carollia perspicillata azteca Saussure.—No. 400 of Jackson taken at Allee Creek and Barbara Lathrop Trail and No. 52456 (410 of Jackson) at Termite Cemetery. These two nonpregnant females weighed 14.7 and 17.7 grams, respectively. Two (♂ and ♀), caught at Termite Cemetery were banded and released.

Carollia castanea H. Allen.—Males, 45080 and 45081, weighed 11.8 and 11.5 grams; at 9:30 P.M., on April 6, on Barbara Lathrop Trail.

Vampyrops helleri Peters.—Male, No. 45095, in net on April 4; weighed 15 grams.

Vampyressa minuta Miller.—Lactating female, No. 45094, weighed 10.0 grams. At 10:30 A.M. at the outer end of the Armour Trail, Young and Hall had barely paused to listen to animal sounds when they saw this bat alight on a breast-high twig of a bush beneath large trees in the gloom of the forest. Possibly it had been disturbed when the zoologists a few seconds before had pushed aside bushes that partly obstructed the trail.

Vampyressa nymphaea Thomas.—Nonpregnant female No. 52455 (403 of Jackson) weighed 10.3 grams and was taken at the Termite Cemetery on May 8. So far as we know, this specimen provides the first record of occurrence in North America of this species which previously had been recorded only from South America.

Chiroderma isthmica Miller.—Male No. 45096, April 2; weighed 13.7 grams.

Vampyrodes major G.M. Allen.—Male No. 45085, weighed 33 grams. It and the one Chiroderma isthmica on the morning of April 2 constituted the total catch found in the net stretched 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 Panamá 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