LA SELVA-BRAULIO CARRILLO MAMMALS 87 



Fig. 68. Spix's disk- winged bat, Thyroptera tricolor. Photo by B. L. Clauson. 



lowlands of Costa Rica. A single individual was recorded in the mammal log at 

 La Selva on 23 May 1983. In June 1988, a colony of seven disk-winged bats was 

 found in an unfurled Heliconia leaf near the field station at La Selva, and another 

 colony was found in the same area in May 1989. Thyroptera is common in other 

 lowland areas in Costa Rica. It is abundant at Tortuguero and on the Osa Penin- 

 sula, but may be locally restricted to areas that combine Heliconia stands with 

 substantial canopy cover. 



Specimens examined (2)— Finca La Selva, 3 km S of Puerto Viejo [1 male, 

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



