BIRDS OF NORTH AND MIDDLE AMERICA. 113 



MYRMECIZA EXSUL OCCIDENTALIS (Cherrie). 



CHERRIE'S ANTBIRD. 



Adult male. — Head and neck, all round, plain black or slate-black; 

 rest of upper parts plain chestnut, the tail slightly darker; anterior 

 lesser wing-coverts black (those along margin of wing white), the 

 posterior ones more brownish; outermost feather of alula some- 

 times edged with white; chest, breast, sides, and abdomen plain 

 blackish slate (rather darker anteriorly, where usually shading grad- 

 ually into the black of throat, slightly paler, or clearer slate color, 

 posteriorly) ; flanks, anal region, and under tail-coverts plain chest- 

 nut-brown or Vandyke brown; bill black; iris brown; bare skin of 

 postocular region and chin sky blue (in life); legs and feet dusky 

 (blackish horn color or dark bluish gray in life); length (skins), 

 125-143 (133); wing, 65-71 (68.3); tail, 47-51.5 (48.1); culmen, 

 20-22 (20.7); tarsus, 27-29.5 (27.8); middle toe, 17.5-19.5 (18.2) .« 



Young male (nestling). — Much like the adult male but coloration 

 much duller, the chestnut of back mixed or tinged with sooty brown, 

 the head, neck, and chest sooty blackish or brownish slate-black, 

 and under parts of body mixed sooty brown and tawny brown. 



Adult female. — Upper parts as in adult male, but color of back, 

 etc., usually rather lighter, more tawny, chestnut, and less sharply 

 defined against the dusky slate color of pileum and hindneck, which 

 are usually more or less tinged with brown; sides of head, chin, and 

 upper throat slate color, the latter sometimes tinged with tawny 

 brown; lower throat and chest bright tawny-chestnut or rufous- 

 chestnut, passing into russet or tawny-russet on breast and abdo- 

 men, the flanks, anal region, and under tail-coverts tawny-brown 

 (between mars brown and russet) ; bill, etc., as in adult male; length 

 (skins), 131-140 (135) ; wing, 62-69 (65.7) ; tail, 44.5-49 (40.8) ; culmen, 

 18.5-21.5 (20.1); tarsus, 27-29.5 (28.1); middle toe, 17-18 (17.7).^^ 



Pacific slope of Costa Rica (Pozo del Pital, Rio Naranjo; Pozo 

 Aziil de Pirris; Pozo del Rio Grande; Pozo de Terraba; El General; 

 Paso Real; Boruca; Buenos Aires; Barranca, Boruca; Las Trojas; 

 Palmar; Lagarto; La Palma de Nicoya; Esparta; San Mateo; San 

 Carlos), and western Panama (Divala; Bugaba). 



Myrrmciza immaculata (not of Sclater and Salvin) Salvin, Proc. Zool. See. 



Lend., 1870, 195 (Bugaba, Panama; crit.). — Boucard, Proc. Zool. Soc. 



Lond., 1878, 61 (San Carlos and San Mateo, Costa Rica). — Ridgway, Proc. 



U. S. Nat. Mus., V, 1882, 398 (La Palma de Nicoya, Costa Rica; crit.).— 



Zeledon, Anal. Mus. Nac. Costa Rica, 1887, li- , part (Las Trojas and Pozo 



Aziil, w. Costa Rica). 

 Myrmeciza immaculata ocddentalis Cherrie, Auk, ^ni, Aj^ril, 1891, 191 (Pozo 



Aziil, s. w. Costa Rica; coll. U. S. Nat. Mus). 



a Ten specimens, from Costa Rica, 

 81255°— Bull. 50—11 8 



