In the original description of _U. magnirostrum_, Davis (1968:680)
reported one specimen from Nicaragua--a female in our collection from 3
km N and 4 km W Sapoa, 40 m, Rivas. We have two additional specimens,
both from the relatively dry northwestern Departamento de Chinandega.
On 8 July 1966, a male (testes 2 mm) was netted under trees along a
small stream at San Antonio, 35 m, and a female (one embryo 28 mm in
crown-rump length) was netted on 4 March 1968 over a warm spring at a
place 4.5 km N Cosigueina, 15 m. Judging from published records, this
species is limited in Middle America to the Pacific versant.
Selected measurements of the three Nicaraguan specimens are,
respectively: total length, 65, 64, 67 mm; length of hind foot, 12, 11,
14 mm; length of ear, 16.5, 16, 18 mm; length of forearm, 42.2, 41.7,
45.2 mm; weight, 16.2, 13.8, 21.4 (pregnant) gms; greatest length of
skull, 22.7, 23.4, 23.8 mm; zygomatic breadth, 12.4, 12.9, 13.1 mm;
postorbital breadth, 5.8, 5.5, 5.9 mm; mastoid breadth, 10.9, 11.1,
11.1 mm; length of maxillary toothrow, 7.9, 8.1, 8.6 mm.