LA SELVA-BRAULIO CARRILLO MAMMALS 



75 



Allen (1892) described the species based on a specimen he thought was from 

 Honduras, but which actually was from Nicaragua. Later (1898) he described a 

 subsequent specimen he thought was from Nicaragua, but which turned out to be 

 from Costa Rica. Casebeer et al. (1963) finally collected three specimens un- 

 equivocally from La Selva. We have since observed them there regularly, and LaVal 

 and Fitch (1977) reported capturing 38. Our specimens from Parque Nacional 

 Braulio Carrillo were taken over a small stream in primary forest. One of the two 

 females captured on 9 February 1983 was pregnant, carrying an embryo 7 mm 

 in length. 



Specimens examined (17)— Puerto Viejo, 100 m [1 female, KU]; 2.5 km SE 

 of Puerto Viejo [1 female, CM]; Finca La Selva, 3 km S of Puerto Viejo, 70 m 

 [2 females, KU; 4 females, LACM; 5 males, MSB; 1 male, UMMZ; 1 female, 

 USNM]; 11 km S, 4.5 km W of Puerto Viejo, 270 m [1 female, UNA; 1 female, 

 USNM]. 



Stumira lilium 

 Yellow-shouldered Bat 



Yellow-shouldered bats are known from Sonora and Tamaulipas, Mexico, to 

 Argentina (Fig. 58). The Costa Rican subspecies, Stumira lilium panidens, is found 

 throughout Central America and Mexico. 



An occupant of both dry and wet forests, this species is locally abundant 

 throughout tropical lowlands. Roost sites include caves, tunnels, hollow trees, 

 buildings, in culverts, and under bridges (Villa-R. 1967). Basically frugivorous, 

 they also may feed occasionally on pollen or nectar (Gardner 1977). They are 

 bimodally polyestrous in Costa Rica (Wilson 1979). 



Mares and Wilson (1971) recorded 32 specimens from Guanacaste. Curious- 

 ly, this species has never been taken at La Selva, although there is a single record 

 from Puerto Viejo. 



Specimen examined (1)— Puerto Viejo, Rio Sarapiqui, 300 ft [1 female, 

 UMMZ]. 



Fig. 58. Yellow-shouldered bat, Stumira lilium. Photo by B. L. Clauson. 



