RAPTORES— FALCONIDAE— B. BOREALIS VAR. CALURUS. 423 



Bill black; cere yellow ; legs and feet yellow. 



Iris brown ; cere greenish-yellow ; base, lower inaudible, and edge along gape greenish-yellow ; legs 

 and feet yellow. 



Iris dark-brown ; core greenish-yellow ; legs and feet yellow. 



BUTEO BOREALIS (Gmel.), var. CALURUS, Cassin. 



'Western Red-failed Hawk. 



Buteo calurus, Cass., Proc. Acad. Nat. Sci. Pbila., vii, 1855, 281.— Id., Birds K A., 1858, 

 22.— Bd., U. S. & Mex. Bound. Surv., ii, pt. ii, 1859, Birds, 3.— Id., P. R. R. 

 Rep., Beckwith's Route, x, 1859, 11, pi. xiv.— CouES, Proc. Acad. Nat. Sci. 

 Pbila., 1800, 44.— Coopeu, Birds Cal., i, 1870, 471.— Stev., U. S. Geol. 

 Surv. Terr., 1870, 402.— Yakkow, Rep. Orn. Specs., 1871, Wheeler's Exped., 

 1874, 36. 



