G32 BULLETIN 50 UNITED STATES NATIONAL MUSEUM. 



Western Nicaragua (San Juan del 8ur; Suouya; Ometepe; Grenada; 

 Corinto); western Costa Rica (Tempate; Bebedero; Punta Arenas; 

 Gulf of Nico3^a; Volcan de Mirav alles) ^ '^' 



Thryothorus pleurostktus (not of Sclater, 1860) Baird, Review Am. Bird^, 1864, 

 123, part (Gulf of Nicoya, Costa Rica). 



{?)Thryophilus jiteurodictua Lawrence, Ann. Lye. N. Y., ix, 1868, 92 (Gulf of 

 Nicoya, Costa Rica). — Frantzius, Journ. fiir Orn., 1869, 291 (Costa Rica). — 

 BoucARD, Proc. Zool. Soc. Lond., 1878, 51 (Punta Arenas, Costa Rica). — 

 Salvin and Godman, Biol. Centr.-Am., Aves, i, 1880, 86, part (Tempate and 

 Bebedero, Costa Rica). — Zeledon, Cat. Aves de Costa Rica, 1882, 3; Proc. 

 U. S. Nat. Mus., viii, 1885, 105 (Costa Rica).— Underwood, Ibis, 1896, 433 

 (Volcan de Miravalles, Costa Rica). 



Thryophilvs pleurostictus Salvin and Godman, Biol. Centr.-Am., Aves, i, 1880, 

 86, part (Corinto and San Juan del Sur, Nicaragua).— Nutting, Proc. U. S. 

 Nat. Mus., vi., 1883, 373 (San Juan del Sur), 381 (Sucuya, Nicaragua) 391 

 [1884] (Ometepe, Nicaragua; song). — Lantz, Trans. Kansas Ac. Sci. for 

 1896-97 (1899), 224 (Grenada, Nicaragua). 



ThryojMlus pleurostictus SchATER and Salvin, Nom. Av. Neotr., 1873, 7, part. 



Thryophilus pleurostictus ravus Ridgway, Proc. Biol. Soc. Wash., xvi, Nov. 30, 

 1903, 167 (San Juan del Sur, Costa Rica; coll. U. S. Nat. Mus.). 



THRYOPHILUS RUFALBUS RUFALBUS ( Lafresnaye). 

 RTTFOTJS AND WHITE WREN. 



Adults {sexes alike).— Above plain light chestnut or deep cinnamon- 

 rufous, the pileuni slightly duller, especially on forehead; tail similar 

 but slightly darker (more nearly chestnut), narrowly Imrred with 

 dusky, the dusky bars less than one-fourth as wide as the chestnut 

 interspaces, except on lateral rectrices, where less than half as wide; 

 remiges narrowly barred with dusky, the bars much narrower and less 

 distinct on secondaries; a rather narrow but sharply defined and very 

 distinct superciliary stripe of white, its posterior extremity margined 

 above with a very narrow line of dusky; a postocular stripe of chest- 

 nut or rufous-brown (on upper portion of auricular region), confluent 

 with the same color on side of neck; suborbital region, auricular 

 region (except upper portion) and malar region white, the feathers 

 more or less edged or streaked (narrowly) with dusky l)rown: ante- 

 rior portion of sides of neck (post-auricular region) streaked black 

 and white; a narrow submalar streak of black or blackish brown; 

 under parts white, passing into pale grayish brown or brownish gray 

 on sides and flanks, the under tail-coverts broadly barred or trans- 

 versely spotted with blackish brown or brownish black, the bars or 

 spots narrowly margined with rusty; maxilla horn color, with paler 

 tomia; mandible pale yellowish gray (in dried skins); legs and feet 

 pale horn color (in dried skins); length (skins), 140-145 (142.5); wing, 



« I have not seen a Costa Rican specimen, and therefore cannot be sure the birds 

 from that country are indistinguishable from those from Nicaragua. 



