146 



NORTH AMERICAN BIRDS. 



A specimen from Santa Clara, California (4,475, Dr. J. G. Cooper), like 

 most of those from the Pacific coast, has the cinereous very dark above, while 

 beneath the ochraceous is everywhere prevalent ; the flanks are strongly 

 tinged with blue ; the black bars of the tail are much broken and irregular. 

 A specimen from Jamaica (24,309, Spanish Town ; W. T. March), however, 

 is even darker than this one, the stripes beneath being almost pure black ; 

 on the tail black prevails, although the bands are very regular. Nos. 27,061, 

 Fort Good Hope, British America, 43,136, Fort Yukon, Alaska, and 51,305, 

 Mazatlan, Mexico, have the streaks beneath narrow and linear ; the ochra- 

 ceous confined to the tibise, which are of a deep shade of this color. 



Falco cohimharius. 



A specimen from Nicaragua (No. 40,957, Chinandega) is like North 

 American examples, but the reddish tinge beneath is scarcely discernible, 

 and confined to the tibise, which are but faintly ochraceous ; the markings 

 beneath are broad and deep umber, the black shaft-streak distinct. 



In the adult female there is as little variation as in the male in plumage, 

 the shade of brown above varying slightly, also the yellowish tinge beneath ; 

 the bars on the tail differ in continuity and tint in various specimens, 

 although they are always five in number, — the first concealed by the coverts, 

 the last terminal. In 19,382, Fort Simpson, British America, and 2,706, 

 •Yukon, R Am. (probably very old birds), the light bars are continuous and 

 pale dull ashy. 



The young vary about the same as adults. Nos. 19,381, Big Island, Great 

 Slave Lake ; 5,483, Petaluma, California ; and 3,760, Eacine, Wisconsin, — 



