BIRDS OF NOETH AND MIDDLE AMERICA. 



363 



rectrices bright metallic green or golden green (sometimes changing 

 to blue or greenish blue in certain lights), the remaining rectrices 

 dark metaUic blue, or violet-blue, brightest on outer web, or with 

 outer web metaUic bluish green, green, or bronze-green; sides of 

 head metaUic green, sometimes tinged with bluish anteriorly; sides 

 of neck bright golden green or golden bronze, like hindneck; chin 

 and upper throat darker metaUic green (more dusky on chin), some- 

 times tinged with golden or coppery posteriorly; lower throat pure- 

 white, forming a more or less triangular transverse patch; rest of 

 under parts plain clear tawny or rufous-tawny; biU black; length 

 (skins), 275-297 (285); wing, 110.5-119.5 (114); taU, 126.5-140 

 (133.5); exposed culmen, 45-52.5 (48.5); width of biU at nostrUs, 

 11.5-13.5 (12.5); tarsus, 13-14 (13.7); outer anterior toe, 14.5-16 

 (15.2).« 



Adult female. — Similar to the adult male, but wliite throat-patch 

 replaced by tawny or tawny-ochraceous, like rest of under parts, 

 which are sHghtly paler than in adult male; length (skins), 260-295 

 (279); wing, 106-115 (110.9); taU, 118-136 (125.3); exposed culmen, 

 43.5-50 (46.5); width of biU at nostrils, 11-13 (11.8); tarsus, 13.5-14 

 (13.7); outer anterior toe, 14.5-16 (15.2).'' 



In the series examined variations are noticeable which to a certain extent seem 

 to be correlated with geographic area; but the series is too small to show whether the 

 differences observed are sufficiently near being constant to warrant the recognition of 

 subspecies. Of the six specimens from Cayenne and British Guiana five have the 

 forehead conspicuously blue, even the crown strongly tinged with blue; of five speci- 

 mens from Venezuela only two have the faintest tinge of blue on the forehead, the 

 color in the other three being bronze-green or golden gi-eeii; while in most examples 

 from Panama and Costa Rica the color of the forehead is about intermediate. The 

 bill averages decidedly broader basally in specimens from Venezuela and the Guianas 

 than in those from Panama and Costa Rica. 



