474 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 112 



Sao Paulo, 1, CNHM; Lago Hyanuary, Pernambuco, 2, MCZ; Salto 

 Grande, Parand, 1, USNM; Sao Marcello, Bahia, 1, CNHM; Villa 

 Bella Imperatriz, south bank of Rio Amazonas, 2, AMNH. Para- 

 guay: near Asuncion, 1, CNHM; Colonia Nueva Italia, Chaco, 1, 

 CNHM; Villa Montes, Chaco, 1, CNHM; Villa Rica, 1, USNM. 

 Uruguay: Salto, 2, CNHM. 



Lasiurus ega ega Gervais: Type locality, Ega, Amazonas, Brazil. 

 diagnosis: dorsum yellowish orange (darker than argentinus), with 

 inconspicuous blackish wash; hairs of interfemoral membrane not 

 contrasting with remainder of dorsum; face black; underparts paler. 

 The Amazonian specimens become progressively darker upstream. 

 Body size small, specimens examined: Bolivia: Buena Vista, Santa 

 Cruz, 1, CNHM. Brazil: Baiao, Rio Tocantins, 2, AMNH; Borba, 

 Rio Madeira, 1, AMNH; Manaos, Rio Negro, 1, AMNH; Rosarinho, 

 Rio Madeira, 1, AMNH; Santarem, Rio Tapajoz, 1, MCZ; Santo 

 Antonio da Uayara, Rio Madeira, 1, AMNH. Peru: Pebas, Loreto, 

 1, ANSP; Sarayacu, Rio Ucayali, 1, AMNH. 



Lasiurus ega Juscatus Thomas: Type locality, Rio Cauquete, Rio 

 Cauca, Colombia (punensis J. A. Allen, Puna Island, Ecuador, is a 

 synonym), diagnosis: dorsum orange with heavy black wash (com- 

 pared with panamensis, coloration is much darker and richer, broad 

 subterminal band of dorsal hair orange rather than buff, and black 

 tip longer and more dominant in mass effect) ; hairs of interfemoral 

 membrane not contrasting with remainder of dorsum; entire head 

 blackish; underparts dusky, becoming buffy posteriorly. Body size 

 small, specimens examined: Colombia: Cali, 1, AMNH. Ecuador: 

 Guayaquil, 1, MCZ; Puna Island, 5, including type of punensis, AMNH. 



Lasiurus ega panamensis Thomas: Type locality, Bugaba, Chiriqui, 

 Panama, diagnosis: dorsum dull sooty yellowish (paler than fuscatus 

 and duller and more black washed than ega) ; hairs of interfemoral 

 membrane not contrasting with remainder of dorsum; face black; 

 underparts dull drabby bun", paler posteriorly. Body size small. 

 specimens examined: Costa Rica: San Jose, 1, AMNH; Villa Quesada, 

 Alajuela, 1, AMNH. Honduras: Tegucigalpa, 1, AMNH. Venezuela: 

 Lagunillas, Zulia, 3, CNHM. Mexico: Achotal, Veracruz, CNHM; 

 Yaxcach, Yucatan, 1, USNM. 



Lasiurus ega xanihinus Thomas: Type locality, Sierra Laguna, Baja 

 California, Mexico, diagnosis: dorsum pale yellowish, lightly washed 

 with black (paler, more yellowish, and less mantled with black than 

 panamensis) ; hair of interfemoral membrane bright 3 T ellow, contrasting 

 with remainder of dorsum; face not blackened; underparts orangish, 

 not becoming significantly paler posteriorly. Body size small, speci- 

 mens examined: Mexico: Comondu, Baja California, 1, USNM; 

 Miraflores, Baja California, 2, AMNH; Santa Anita, Baja California, 



