FALCONID^l DIURNAL KAPTOKES. 469 



Two eggs of this species, unusually large and entirely free from 

 markings, were obtained by the writer at Mount Carmel, on the 6th 

 of March, 1867, and are now in the collection of the National 

 Museum at Washington. The nest was on the summit of a tall 

 black gum tree (Nyssa sylvatica), about ninety feet from the ground. 



The claim of the western race of the Eed-tailed Hawk rests on 

 the capture of a single specimen "near Chicago in April, 1873," by 

 Mr. C. H. Smith, as recorded by Mr. Nelson in his list, p. 119. 



The occurrence in Illinois of the very strongly marked race known 

 as Krider's Eed-tailed Hawk, is verified by a specimen presented to 

 the United States National Museum, by Mr. H. K. Coale, and ob- 

 tained July 25, 1876, on the bank of the Des Plaines Eiver, about 

 34 miles northwest of Chicago. 



Buteo harlani (Aud.) 



HAKLAN'S HAWK. 



Popular synonyms. Black "Warrior; Harlan's Buzzard. 

 Falco harlani AUD. B. Am. i. 1831, pi. 36; Orn. Biog. 1,1831, 441. 



Buteo harlani'Bp. 1833. AUD. Synop. 1839,6; B. Am. i, 1840, 38, pi. 8. CASS. In B. N. 

 Am. 1858, 24 (part; not desc. of supposed young, which=.B. borealis calurus!). 

 -BATED. Cat. N. Am.B. 1859,No. 22,-CouEs, Key. 1872, 216; Check List, 1874. No. 350; 

 2d ed. 1882, No. 515; B. N. W. 1874, 352. B. B. & B. Hist. N. Am. B. iii, 1874, 292. 

 -KIDGW. Norn. N. Am. B. 1881, No. 438. 

 Buteo cooperi CASS. Proc. Acad. Nat. Sci. Phil. 1856, 253. 



HAB. Southern portion of Mississippi Valley, from Louisiana and Texas, to southern 

 Illinois and eastern Kansas; New Mexico; Pennsylvania? eastern Mexico? Guatemala. 



a. Light phase. 



Adult (No. 8. 525. Santa Clara, California, October, 1856: Dr. J. G. Cooper. Type of B. 

 cooperi CASS). Head, neck, and whole lower parts white ; feathers of the head and neck 

 with median longitudinal streaks of black, the white prevailing on the occiput and super- 

 ciliary region, the black predominating over the cheeks, forming a "mustache"; throat 

 with fine lanceolate blackish streaks; sides of the breast with broader, more cuneate 

 markings of the same ; flauks with narrow, lanceolate stripes, these extending sparsely 

 across the abdomen; tibiae, and lower tail-coverts immaculate, the inner face of the for- 

 mer, however, with faint specks. Upper plumage in general dark plumbeous brown, 

 inclining to black on the back; plumbeous clearest on primaries, which are uniformly of 

 this color, the inner ones inclining to fine cinereous. Scapulars and wing-coverts spat- 

 tered with white beneath the surface. Rump black; upper tail-coverts white tinged with 

 rufous, and with irregular distant transverse bars of blackish. Tail with light rufous 

 prevailing, but this broken up by longitudinal daubs and washes of cinereous, and 

 darker mottlings running longitudinally on both webs; basally the ground color ap- 

 proaches white ; tip white, and a distinct, but very irregular, subterminal band of black, 

 into which the longitudinal mottlings melt; outer webs of lateral feathers entirely cinere- 

 ous, and without the black band. Under side of the wing white with a large black space 

 on the lining near the edge ; under surface of primaries white anterior to their emargi- 

 nation, finely mottled with ashy, and with indistinct transverse bands terminally. Fourth 

 quill longest; third shorter than fifth; second equal to sixth; first equal to tenth. Wing, 

 15.75; tail. 9.10; tarsus, 3.25; middle toe. 1.70. 



