176 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



but with cinnamon-rufous area confined to inner web; three outer- 

 most primaries with inner web wholly dusky, the outer web mostly 

 dull cinnamon-rufous; a narrow but conspicuous superciliary streak 

 of buffy white, indistinct anteriorly; lores mostly dull grayish or 

 dusky; a broad postocular streak of brownish black or dark sooty 

 brown; auricular region dusky, streaked with pale brownish buff or 

 whitish, and bordered below by a conspicuous subauricular streak 

 of white; chin and throat dull white or yellowish white, the lower 

 throat sometimes streaked, more or less, with olive; rest of under 

 parts light grayish brown (hair brown to light Isabella color), passing 

 into a more rufescent or cinnamomeous hue posteriorly, streaked 

 with dull white, the streaks broadest on chest; under wing-coverts 

 deep ochraceous-buff ; maxilla dusky horn color, paler on lower-basal 

 portion; mandible dull pale yellowish or whitish (in dried skins), 

 passing into dusky or horn color terminally; iris dark brown; legs 

 and feet dusky horn color (dark bluish gray in life). 



IfoZe.— Length (skins) 112-121 (115); wing, 63-71.5 (67.6); tail, 

 43.5-50 (47.9); culmen, 12-13 (12.6); tarsus, 14.5; middle toe, 13-14 

 (13.3).'^ 



Costa Rica (Juan Viiias; Guayabo) and Panama (Boquete, 4,500- 

 5,000 ft.; Volcan de Chiriqui), and southward through Colombia (San 

 Antonio, Rio Cah; Rio Chiquitos; Rio Lima; Bogota; Cauta; Medellm, 

 Antioquia; Los Tambos; Santa Elena and Las Nubes, Santa Marta) 

 and Ecuador (Guayaquil; Machay; Balzar Mountains; Sarayacu; 

 Baeza; Vinces) to Peru (Chamicuros; Ropaybamba; Anquimarca; 

 Tambillo; Guajango; Chirimoto; Cococho; Huambo; Nauta; Rio 

 Ucayah; La Gloria; Borgona; Garita del Sol; Idma; Santa Ana).^ 



Xenops rutilans (not of Temminck) Sclater, Proc. Zool. Soc. Lend., 1856, 27 



(Bogota, Colombia; crit.). 

 Xenops rutilus (not of Lichtenstein) Wyatt, Ibis, 1871, 331 (Cauta, Colombia).— 



Sclater and Salvin, Proc. Zool. Soc. Lond., 1873, 270 (Chamicuros, e. Peru; 



o Four specimens. 



Locality. 



MALES. 



Two adult males from western PanamA (Boqnete, Chiriqui) . . 

 Two adult males from northwestern Colombia (Rio Call and 



Rio Limdn) 



Eight adult males {X. r. rutilus) from southwestern Brazil 



(Chapada) 



FKMALES. 



One adult female from Triniddd 



Four adult females {X. r. rutilus) from Brazil (3 from Chapada) 



Wing. 



(55. .5 

 69.7 

 06. 2 



63 

 65.2 



Tail. 



46.7 

 49 



47.8 



43 

 46.1 



Cul- 

 men. 



12.7 

 12.5 

 12.5 



12 



12.2 



Tarsus. 



14.5 

 14.5 

 14 



Middle 

 toe. 



13 



13.7 



13.4 



b I have not seen specimens from Ecuador or Peru. 



