Pregnant females were taken on the following dates (crown-rump length of embryo in parentheses): 25 February (12 mm), 2 March (17 mm), 15 March (14 mm); a nonpregnant female also was taken on 15 March. Five males captured at San Antonio on 9 and 10 March had an average testicular length of 5.6 (5-6) mm. A male taken in July had testes 4 mm in length, whereas those of one obtained on 14 March were 5 mm long.
Selected measurements (average, with extremes in parentheses) of 11 adults (seven males and four females) are as follows: length of forearm, 42.5 (41.5-43.7) mm; condylobasal length (10 specimens only), 14.8 (14.5-15.0) mm; zygomatic breadth, 14.8 (14.4-15.1) mm; interorbital breadth, 5.0 (4.7-5.2) mm; breadth across upper molars, 10.6 (10.5-11.0) mm; length of maxillary toothrow, 5.0 (4.8-5.3) mm. These measurements generally agree with those given by Paradiso (1967:600) for 20 individuals from Panamá. Females in our series average slightly larger than do males in external and cranial measurements. Six males weighed an average of 22.9 (20.7-25.1) gms; one nonpregnant female weighed 17.1 gms.
Diphylla ecaudata Spix, 1823
Specimens.—Boaco: Los Cocos, 14 km S Boaco, 220 m, 5. Madriz: 5 km N, 9 km E Condega, 800 m, 1. Matagalpa: 2 km N, 6 km E Esquipulas, 960 m, 1.
Our specimens constitute the first report of this species from Nicaragua. We follow Burt and Stirton (1961:37) in regarding D. ecaudata as monotypic.
Specimens from Los Cocos (three males and two females) were captured in a mist net stretched across a large, quiet pool in a small stream. The banks supported well-developed gallery forest, the understory of which had been cleared for human habitation; grassland (grazed) and small stands of secondary forest obtained beyond the riparian habitat. Domestic ducks, a possible source of food, were observed sleeping along the bank of this stream and on top of large boulders situated in the stream. Males from this locality taken on 20 February, 4 April, and 18 July had testicular lengths of 5, 6, and 6.5 mm, respectively. Two adult females collected there on 4 April were reproductively inactive. An adult male (testes 6 mm) from near Condega was captured on 23 June in a daytime roost in a small, cave-like crevice (see account of Peropteryx marcotis), and one from northeast of Esquipulas (testes 5 mm) was netted on 14 March along a forest trail (see account of Vampyressa pusilla).
Natalus stramineus saturatus Dalquest and Hall, 1949
Specimens.—Granada: 6 km S Nandaime, 5. Zelaya: S side Río Mico, El Recreo, 25 m, 2.
This funnel-eared species occupies an extensive geographic range (northern México to Brazil) but appears to be relatively rare in Middle America to the south of Guatemala. Our specimens represent the first of this species to be reported from Nicaragua.
Both specimens from El Recreo, adult males, were caught by hand at night after they flew through an open door into a small room, possibly seeking insects that were swarming around a light bulb. Those from near Nandaime (three males, two females) were caught in a mist net set over the mouth of a well in which they were roosting; the well was approximately 2 m in diameter, and the water level was about 5 m below the rim. The females were not reproductively active (6 August).