BIRDS OP NORTH AND MIDDLE AMERICA. 



317 



der,° length (skins), 276-343 (299); wing, 170-195.5 (185.2); tail, 

 93.5-117.5 (103.8); culmen, 18-23.5 (19.7); tarsus, 22.5-26 (24.4); 

 middle toe, 25.5-33 (29.1).° 



Adult female. — Similar to the adult male but back, rump, scap- 

 ulars, and smaller wing-coverts brown or grayish brown (dull brownish 

 chestnut to deep brownish drab — usually much nearer the latter) 

 instead of chestnut or bay, color of pileum and sides of head less 

 purplish brown, neck with spots mostly white and black squama- 

 tions less highly glossed, and under parts without purplish or vina- 

 ceous tinge; length (skins) 281-319 (300); wing, 169-181.5 (175.4); 

 tail, 97-111 (103.5); culmen, 16.5-21 (19.2); tarsus, 21-24.5 (23.4); 

 middle toe, 27-31 (28.8) . 6 



a Forty -two specimens. 



6 Thirteen specimens. 



Locality. 



Middle 

 toe. 



MALES. 



Two adult males from Vera Cruz 



One adult male from Oaxaca 



One adult male from Yucatan 



One adult male from Guatemala 



One adult male from British Honduras 



One adult male from Honduras 



Ten adult males from Costa Rica 



Eight adult males from western Panama 



Three adult males from middle Panama (Canal Zone) 



Seven adult males from Colombia (Santa Marta) 



Three adult males from Trinidad 



One adult male from northern Brazil 



Three adult males from southwestern Brazil (Chapada, Matto 



FEMALES. 



One adult female from Vera Cruz 



One adult female from Guatemala 



One adult female from British Honduras 



Four adult females from Costa Rica 



Two adult females from middle Panama (Canal Zone) 



Two adult females from Colombia (Santa Marta) 



One adult female from Venezuela 



One adult female from Lower Amazon (Diamantina) 



28.7 



31.5 



27.5 



30.5 



31 



28 



28.4 



28.2 



29.3 



29.6 



31.3 



28 



29.3 



30 



29.5 



29 



28 



28.5 



30.7 



30 



28.5 



There is a remarkable range of individual variation in the coloration of the under 

 parts, a fine series of specimens from Costa Rica showing practically all the extremes 

 in this respect. The only suggestion of possible geographic difference in coloration 

 is in the case of three adult males from Chapada, Mattogrosso, western Brazil. These 

 three examples have the under parts (including chest) white, the feathers rather 

 broadly margined with dark livid brown, in which respect they are not materially 

 different from specimens from Central America and more northern parts of South 

 America, the suggestive feature being that the three Chapada specimens are prac- 

 tically alike. It is, however, of course possible that a larger series from Chapada 

 would show the usual individual variation in coloration of the under parts. 



