146 



NORTH AMKiaCAX BIRDS. 



A specimen from Ranta Clara, California (4,475, Dr. J. C.. Cooper), like 

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

 beneath the ochraceous is everywhere prevalent ; tlie ilanks are strongly 

 tinged with blue; tlu' black bars of the tail are nuu-li Innkcu ami irregular. 

 A specimen from Jamaica (24,.309, Spanish Town ; W. T. WarchJ, 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, ]\Iexico, have the streaks beneath narrow and linear ; the ochra- 

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



Falco columbarius- 



A specimen from Nicaragua (Xo. 40,957, Chinandega) is like North 

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

 and confined to the tibiae 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 aliove varying slightly, also the yellowish tinge beneath ; 

 the l>ars on the tail difl'er 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 Anieiiia, and 2,706, 

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

 pale dull ashy. 



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

 Slave Lake; 5,483, Petalu ma, California ; and 3,7G0, Bacine, Wisconsin, — 



