162 
Urubitinga ( Antenor ) unicincta Ridgw. Pr. Boston Soc. N. H. May, 1873, 93. 
Parabuteo unicinctus Ridgw. B. B. & R. Hist. N. Am. B. iii, 1874, 249, 250. 
Erythrocnema unicincta Sharpe, Cat. Acc. B. M. 1874, 85. 
Polyborus tceniurus Tschudi, Arch. f. Naturg. 1844, 263 ; Fauna Per. 1844, pi. 1. 
Hab .—South America generally, south to Chili and Buenos Ayres. 
[i. hctrrisi , And. 
Falco harrisii Aud. B. Am. 1831, pi. cccxcii; Orn. Biog. v, 1849, 30. 
Buteo harrisii Bonap. Comp. List, 1338, 3.— Aud. Svuop. 1839, 5.— De Kay Zool. 
N. Y. ii, 1844, 11. 
Craxirex harrisii Codes, Pr. A. N. S. Phil. 1866, 49.— Cooper, Orn. Cal. i, 1870, 493. 
Buteo unicinctus var. harrisii Ridgw. Cones’ Key, 1872, 215.— Coues, Check List N. 
Am. B. 1873, 69, No. 348.— Lawk. Mem. Boston Soc. N. H. ii, 1874, 302 (N. W. 
Mexico). 
Antenor unicinctus var. harrisi Ridgw. B. B. & R. Hist. N. Am. B. iii, 1874, 250. 
Parabuteo unicinctus var. harrisi Ridgw. B. B. & R. Hist. N. Am. B. iii, 1874, 250. 
Craxirex unicinctus Cass. B. N. Am. 1858, 46 (not of Bonap. 1854, ex Temiu. 1820).— 
Baird, Cat. N. Am. B. 1859, No. 46.— Dresser, Ibis, 1865,329.— Codes, Pr. A. N. 
S. Phil. 1866, 13.— Salvin, P. Z. S. 1867, 158 (Veragua). 
Erythrocnema unicincta Sharpe, Cat. Acc. B. M. 1874, 85 (in part). 
Hob .—Middle America, from the southern border of the United States 
{Louisiana to Lower California) south to Panama ('?). 
Wing, 11.65-14.60; tail, 9.00-11.00; culmen, 0.82-1.10; tarsus, 2.78- 
3.75; middle toe, 1.52-2.00. Adult: —General color brownish-black or 
blackish-brown, uniform or slightly variegated by light spotting; the 
lesser wing-coverts and tibiae deep rufous or chestnut. Tail black ; the 
end and base white, as are also the tail-coverts. Young: —Plumage 
greatly variegated. Above blackish-brown, the feathers edged with 
rusty; head and neck streaked with pale ochraceous. Lower parts pale 
ochraceous or vellowish-white, the breast and abdomen with longitud¬ 
inal ovoid spots of blackish; tibim with transverse bars of dark rusty; 
lower tail-coverts with black shaft-streaks. Lesser wing-covert region 
only washed with rufous. Tail grayish-brown, whitish at the tip, and 
crossed by narrow bands of dusky. 
a. unicinctus. 
Adult with the blackish more or less broken up by lighter spotting or 
streaking; tibiae barred rufous aud ochraceous. Wing, 11.65-14.60; 
tail, 9.00-10.50 ; culmen, 0.82-1.02; tarsus, 2.78-3.40 ; middle toe, 1.52- 
1.85. Adult (?) female (No. 48814, Santiago, Chile):—Prevailing color 
brownish-black, broken by white streaks on the cheeks and throat, 
white borders and concealed spots on the abdomen, and ochraceous 
edges to feathers of the central portion of the breast. Remiges with 
a narrow terminal border of white. Wing-coverts mostly deep ferru¬ 
ginous-rufous, nearly uniform and almost chestnut in tint on the 
lesser coverts, which have dusky shaft-streaks, but much broken by a 
dusky spotting ou the middle and greater coverts, where the central 
portion of each feather is uniform blackish. Lining of the wing mostly 
ferruginous, but this broken by white and dusky spotting. Tibiae 
ochraceous, irregularly barred with rusty-rufous, these bars suffused into 
a nearly continuous wash of the latter color on the outer surface. Upper 
tail-coverts and crissum immaculate white. Tail uniform black, the 
extreme base and a sharply-defined terminal band, about one inch broad, 
pure white; the inner webs of the feathers more or less mottled with 
grayish-brown, the white at the base extending farther from the roots 
of the feathers. Inner webs of primaries white anterior to their emar- 
gination, relieved by indications of dusky bars, the remaining portion 
grayish-dusky, with irregular or broken blackish bars. Young (No. 
