i886.] Mearns 071 Birds of Arizona. 63 



positive was his belief that the Bhick Hawks seen b\- iiim in dif- 

 ferent parts of Arizona were Uriihitinga aiithi-acina ; and, on 

 reading his article, after forming the acqnaintance of both these 

 Hawks, I have not the slightest d )nbt that he was correct, much 

 as I env\' him precedence in making the discovery. 



Although the superHcial resemblance in the color-pattern of 

 these birds of different genei'a has occasioned error or doubt in 

 identitVing tht'm, they may be readily distinguished by their 

 generic characters ; but, as North American specimens of Urubi- 

 tinga anthraciiia have never been described, and the descriptions 

 of the species are n )t always conveniently accessible, I here insert 

 descriptions of both species for comparison, describing the nest- 

 ling of Urubitingx anthraciiia^ I believe, for the first time. 

 For convenience of reference such svnonvms are given as are 

 pertinent to this paper. 



Buteo abbreviatus Caban. Zone-tailed Hawk. 



Buteo abbreviatus Cab. Schomb. Guiana, III, 1848, p. 739. — Sharpe, 

 Cat. Bh-ds Brit. Mus. I, 187, p. 163.— Brown, Bail. N. O. C. VII, No. 

 I, Jan. [SS2, p. 42.— Brevvst. Bull. N. O. C. VIII, No. i, Jan. 18S3, p. 

 30. — Brown. Aulv, I, No. 2, April, 1SS4, p. 122. 



Buteo zonocercus ScL. Trans. Zool. Soc. Lond. IV, pt. VI, 1858, p. 

 263, pi. 59. — CouES, Proc. Acad. Nat. Sci. Pliila. i865. p. 4'S. — CooPiiR, 

 Birds Cal. 1S70, p. 479. — Cjues, Kev, 1872, p. ^\i. — ^Ridgw. Hist. N. Am. 

 Birds, III, 1S74. p. 273— B.iEWST. Bull. N. O.C. IV, No. 2, April, 1879. 

 p. So. — Stephens, Bull. N. O. C. IV, No. 3, July, 1S79, p. ^^9. 



Description. — Adult male in breeding plumage (No. 4048, New River, 

 Arizona, May 16, 18S5 ; E. A. M.). General color brownish black, glossed 

 with dull metallic colors of gold, purple, steel-blue, and green; forehead 

 and rictus white, mixed with black hairs; feathers of crown, neck, inter- 

 scapular region, and breast white at base, but the white nowhere exposed; 

 the breast with a few lateral white spots of irregular form. Tail black, 

 narrowly tipped with ash above, more broadly below, with a white bar cross- 

 ing it transversely ; broadly banded near the end with hoary plumbeous, and 

 more narrowly about the middle with the same color, which, except on the 

 central pair, becomes pure white upon the concealed inner webs of the 

 feathers above, and on both webs below; a series of spots upon the inner 

 webs indicate still another caudal bar, which is not apparent above. The 

 brownish black primaries are banded with deep black. Lining of wings black, 

 some of the feathers spotted laterally with ashy white. Under surface of 

 primaries dusky plumbeous, irregularly barred and mottled with grayish 

 white and ashy. A few of the upper tail-coverts have small, concealed, ovate 



