428 



EEVIEW OF AMERICAN BIRDS. 



[part I. 



Sex 

 aud 

 Age. 



Locality. 



Puerto Cabello, Veil. 

 Bogota, 



When 

 Collected. 



Received from 



J. Krider, 



L. de Geofroy. 



Collected by 



Myiadestes iinicolor. 



Myiadestes unicolor, Sclater, P. Z. S. 1856, 299 (Cordova); 1857,5, 

 213 (Orizaba) ; 1858, 97.— Ib. Catal. 1861, 47, uo. 289.— Sclatek 

 & Salvin, Ibis, 1860, 397 (Cobau). 



Hab. Central Mexico and Guatemala. 



(No. 22,377, 9 , type.) Second quill rather shorter than 7th ; 4th and 5tli 

 longest, and about equal ; 1st about one-third the longest. 



General color dark slate color, paler below (darkest on juguhim and breast) ; 

 chin and anal region lighter. Eyelids white ; lores and cheeks dusky. Tail 

 feathers black, except central, which are like the back, the outermost which 

 is ashy except at base, and the second feather which has the end and a portion 

 of inner web asliy, the extreme tips of the two last mentioned feathers whitish. 

 Quills with a baud of dull fulvous across their bases, shown very obscurely 

 exterually as a transverse wing-bar, followed by a blackish one. Bill black; 

 legs hazel. 



(No. 22,377, 9.) Total length, 7.50; wing, 3.80; tail, 3.70; difference be- 

 tween "outer and fourth tail feathers, .50 ; difference between 10th and longest 

 quills, .85 ; exposed portion of 1st primary, 1.00, of 2d, 2.50, of longest (4th) 

 (measured from exposed base of 1st primary), 3.00 ; length of bill from fore- 

 head, .60, from nostril, .30, along gape, .76 ; tarsus, .85 ; middle toe and claw, 

 .80, claw alone, .22 ; hind toe and claw, .60, claw alone, .26. 



This species in form resembles 31. obscurns, although in colora- 

 tion is more like townsendii, from which the prevailing dark slate 

 (not grayish-ash), and the absence of the distinct cinnamon bars 

 across the quills i^eadily distinguish it. The pattern of coloration 

 of quills is as in townsendii, but the want of contrast in the tints 

 renders this almost inappreciable in the prevailing dark slaty plumbe- 

 ous of upper parts. The axillars and inner lining of wings are slate, 

 like the breast ; but the pale fulvous band at base of cjuills is very 

 well marked in the inside of wins;. 



Smith- 

 sonian 

 No. 



CoUec-| Sex 

 tor's I and 

 No, Age, 



Locality. 



When 



Collected, 



Received from 



Remarks. 



22.377 

 30,720 



Cordova, Mex. 

 Choctum, Vera Paz. 



Jan. 1860. 



Verreaux. 

 Salvin. 



Type, [type. 



Compared with 



