86 



NORTH AMERICAN FAUNA 75 



Parasitic streblid bat flies we found on vampire bats include Strebla wiedemanni 

 (1 female) and Trichobius parasiticus (1 male, 1 female). 



Specimens examined (7)— Finca La Selva, 3 km S of Puerto Viejo, 70 m 

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

 S, 11.5 km E of San Miguel, 580 m [3 females, USNM; 1 male, UNA]; 5 km 

 E of Vara Blanca, 2,050 m [1 female, USNM]. 



Additional records (2)— 4 mi W of Puerto Viejo, 300 ft [1 female, TCWC]; 

 Vara Blanca [LSUMZ; Gardner et al. 1970]. 



Family Furipteridae 



Furipterus horrens 

 Smoky Bat 



Smoky bats reach the northern limit of their range in Costa Rica and are known 

 from South America as far south as Brazil. Furipterus horrens is a monotypic genus 

 and species. 



Although this species is primarily restricted to mesic forest habitats, it has 

 been reported from dry forest in South America (Uieda et al. 1980). Roost sites 

 are in caves, hollow logs, and rock crevices (LaVal 1977; Uieda et al. 1980). Uieda 

 et al. (1980) reported moths to be important dietary items. Scattered reports of 

 reproductive activity are insufficient to speculate on the annual cycle. 



LaVal (1977) found a roost in a hollow log at La Selva containing more than 

 59 individuals. This is the northernmost locality for the species, and the only known 

 Costa Rican locality of record. 



Specimens examined (2)— Finca La Selva, 3 km S of Puerto Viejo, 70 m 

 [1 male, 1 female, KU]. 



Family Thyropteridae 



Thyroptera tricolor 

 Spix's Disk-winged Bat 



Spix's disk- winged bats are known from Veracruz, Mexico, to southern Brazil 

 (Fig. 68). The Costa Rican subspecies, Thyroptera tricolor albiventer, occurs through- 

 out Central America. Disk- winged bats occur from sea level to middle elevations. 



This species is found in wet forest habitats with stands of Heliconia spp. In- 

 dividuals roost inside the tubular emerging leaves of these plants and also of the 

 introduced banana (Musa sapientum), holding onto the leaf with the unique suc- 

 tion cups on their wrists and ankles (Findley and Wilson 1974). They are insec- 

 tivorous, but details of the diet are unknown. They roost in family groups, but 

 details of the reproductive cycle are not available (Wilson and Findley 1977). 



Goodwin (1946) reported the first Costa Rican specimens from Puntarenas 

 Province. Starrett and de la Torre (1964) added a specimen from Golfito, and Gard- 

 ner et al. (1970) also reported Thyroptera tricolor from the Osa Peninsula. Our 

 specimen from Parque Nacional Braulio Carrillo was captured in a mist net across 

 a narrow road through an old pasture, with primary forest nearby. Disk- winged 

 bats have been observed at La Selva on only a few occasions. The specimen now 

 at LACM was taken in the early 1960's and was the first from the Caribbean 



