606 



BULLETIN" 50, UNITED STATES NATIONAL MUSEUM. 



Adult male.— Length (sldns), 346-385 (361); wing, 314-345 

 (328.6); tail, 126-152.5 (138.1); culmen (from cere), 21-24 (22.1); 

 tarsus, 67.5-77.5 (73.3); middle toe, 34-41.5 (37.5).« 



Adult female.— Length, (skins), 332-397 (366); wing, 320-360 

 (336.9); tail, 127-157.5 (141.1); culmen (from cere), 21-23.5 (22.6); 

 tarsus, 66.5-76 (70.9); middle toe, 35.5-41 (38.7).'^ 



Greater part of United States and Mexico; breeding in Lower and 

 Upper Austral zones, north to Long Island (Flushing), New Jersey, 

 Pennsylvania (Berks County), western New York, Ohio (Pickaway 

 County), northern Indiana (Wabash County), northern Illinois (Cham- 

 paign County), southern Nebraska, Colorado (Denver; Pueblo; 

 Wet Mountam Valley; Rocky Ford; Burlington), and upper Sacra- 

 mento Valley, northern California, and occurring, more or less irregu- 

 larly, farther northward to Massachusetts (Springfield; Lynn; West- 

 port, December; Worcester, May; Weston, November), Vermont 

 (Lyndon, June), Ontario (Long Point, November; Toronto, Sep- 

 tember; Hamilton), Michigan (near Northville, October; lower 



« Eighteen specimens. 



Locality. 



MALES. 



Five adult males from Maryland, District of Columbia, and 



Virginia 



One adult mals from Arizona 



Three adult males from California 



Four adult males from s. Lower California 



Two adult males from Jalisco 



One adult male from Chiapas 



One adult male from e. Nicaragua (Rio Escondido, Jan.) 



FEMALES. 



Four adult females from Delaware to North Carolina 



One adult female from Missouri 



Two adult females from Arizona 



Three adult females from California 



Two adult females from s. Lower California 



T wo adult females from Sinaloa 



Three adult females from Jalisco 



One adult female from Chiapas 



Wing. 



33S. 4 



345 



325 



324 



316 



314 



325 



340.8 



354 



326 



332 



336 



337.5 



342.3 



32G 



Tail. 



143.8 



145 



142.3 



134 



129.7 



126 



132 



146 



148 



136 



142.3 



141.7 



137.2 



141.3 



127 



Cul- 

 men, 

 from 

 cere. 



22.3 



21.5 



22 



22 



22.5 



21 



23 



23.1 



23.5 



22.5 



21.8 



21.7 



23 



23 



Tarsus. 



75.4 



74.5 



69.7 



71.5 



73.5 



75 



74.5 



72.9 



75.5 



70.2 



71.3 



68 



70.7 



69 



69 



Mid- 

 dle 



toe. 



39.2 

 37.5 

 34.5 

 36.7 

 35.5 

 38.5 

 38 



39.6 



39 



37.5 



39 



37.2 



36.7 



39.7 



39.5 



I am unable to discover constant differences of coloration between specimens from 

 the eastern and western United States or between these and those from Mexico. Most 

 of the specimens examined from the Pacific coast district (Cape San Lucas to Oregon) 

 have an unusual amount of ochraceous-buff or tawny-ochraceous in the plumage of 

 the upper parts, and it is possible that the birds from that region may prove separable 

 when a larger series has been examined. The specimen from the Rio Escondido, 

 eastern Nicaragua, represents the extreme white-bellied phase and is nowise, that I 

 can see, different from northern examples. 



