BIRDS OF NORTH AND MIDDLE AMERICA. 



877 



parts slightly glossy blackish slate, darker (nearly black) on upper 

 back, lighter (more slaty) on tail, the more posterior scapulars and 

 interscapulars, wing-coverts, secondaries, feathers of rump, upper 

 taU-coverts, and rectrices more or less distinctly margined terminally 

 with white, these white margins broadest on upper taU-coverts ; a very 

 broad band across breast and lower chest black, sometimes (in younger 

 birds ?) slightly broken by narrow terminal margins of whitish to some 

 of the feathers; sides and flanks blackish slate or slate-black, more or 

 less broadly barred with white; rest of under parts white; under wing 

 coverts black, with a more or less extensive median area or stripe of 

 white, those along carpo-metacarpal edge white; basal portion of 

 inner webs of remiges white (this involving proximal half or more of 

 the secondaries), the remaining portion plain slate color; bill black; 

 iris dark purplish, red, or wine purple; legs and feet dark gray or 

 grayish black. 



Adult male.— Length (skins), 220-249 (234); wing, 110.5-120.5 

 (115.9); tail, 78.5-92 (84.4); exposed culmen, 37-45.5 (41.9); depth 

 of bill at nostril, 16-19 (18); tarsus, 18-21 (19.7); outer anterior toe, 

 20.5-25 (23.1).« 



Adult female.— Length (skins), 225-256 (243); wing, 112-119.5 

 (116.6); tail, 78-92.5 (87.7); exposed culmen, 36-47 (43); depth of 

 bill at nostrils, 17-19 (18); tarsus, 18.5-21 (19.7); outer anterior toe, 

 22-25 (22.9).^ 



a Seventeen specimens. 



b Eighteen specimens. 



Locality. 



Wing. 



TaU. 



Ex- Depth 



posed jofbillat 



culmen. nostrils. 



Tarsus, 



Outer 



anterior 



toe. 



MALES. 



One adult male from e. Guatemala (Gualan) 



One adult male from British Honduras 



One adult male from Honduras (Santa Ana) . . 



Four adult males from e. Costa Rica 



Two adult males from w. Costa Rica 



Two adult males from w. Nicaragua 



One adult male from w. Panama (Divala) 



Four adult males from e. Panama (Canal Zone). 

 One adult male from Venezuela (El Pilar) 



FEMALES. 



One adult female from Oa.xaca 



One adult female from Chiapas (San Benito) 



One adult female from British Honduras 



Two adult females from Honduras (Santa Ana) 



Three adult females from e. Costa Rica 



Four adult females from w. Nicaragua 



Two adult females from w. Costa Rica 



Three adult females from e. Panama (Canal Zone) . 



SEX XINDETERMINED. 



One adult from w. Ecuador (Guayaquil) 



One adult from Amazon Valley, Brazil 



116 



120 



115.5 



113.5 



118.7 



117.7 



lis. 5 



114.5 



114 



117.5 



118 



119 



118.2 



115.9 



116.6 



117.5 



114.2 



117 

 lis 



87.5 



87.5 



88.5 



83.9 



90 



80.7 



83.5 



81.2 



85 



90.5 



89 



93 



89.5 



89.2 



83.5 



40.5 



42 



43.5 



41.4 



45.2 



41.7 



47 



39.1 



42.5 



44 



45.5 



45.5 



45.5 



42.1 



43.4 



40.5 



41 



42.5 

 42.5 



17.5 



18 



18 



17.2 



18.7 



18.5 



19 



17.7 



18.5 



18 



19 



18.5 



18 



17.4 



18.4 



17.7 



18 



18 

 18 



18.5 



19 



20.5 



19 



20.5 



20 



20 



19.9 



20 



18.5 



21 



19 



20 



19.1 



20.1 



20.5 



19.3 



19.5 

 19.5 



22.5 



24 



23 



22.9 



24.2 



24 



24 



22 



23 



22 



24 



23 



23 



22.5 



23 



24.5 



22.3 



21 

 23.5 



There is considerable variation in the width of the black pectoral band, relative 

 amount of blackish and white on sides and flanks, and also in width of the white frontal 

 area; but these variations seem to have no relation to geographic area. 



