542 SYSTE3IA TIC SYNOPSIS. — HAP TORES — A CCIPITBES. 
cooperi), or of very partial distribution in N. Am. In all cases, the sexes are alike or similar; 
the 9 is larger than the ^ ; the young are different from the adults ; melanism is frequently 
exhibited. 
Analysis of Subgenera and Siiecies. 
Five outer primaries emarginate or sinuate on inner webs ; tail more than § the wing ; bill high at base ; 
nostrils oval, with eccentric tubercle. {Parabuteo.) 
Tail blackish (with white base and tip) ; lesser wing-coverts and tibije reddish ; general plumage 
blackish. Southwestern U. S., common unicinctus 512 
Four outer primaries emarginate or sinuate on inner webs. 
Tail white, with a broad black subterminal zone and numerous very narrow, zig-zag, or broken, 
blackish cross-lines. Texas albocaudatus 513 
Tail mostly white, ashy-clouded ; marked lengthwise with rufous and darker ; and with dark sub- 
terminal zone ; under parts mostly white. Gala., one specimen known cooperi 514 
Tail mottled with dusky and white, and with subterminal blackish zone; showing also reddish 
touches. Plumage almost entirely blackish, with fleecy-white bases of feathers. Kas. to Tex., 
little known harlani 515 
Tail of adult chestnut-red, with broad black subterminal bar, aud others or not ; no reddish on wing- 
coverts ; white prevailing on under parts, especially breast. Tail of young closely barred with 
grayish and blackish. Largest and most robust ; wing usually 14.00 or more ; tarsus stout. 
N. Am., abundant borealis 516-519 
Tail of adult black, crossed by about 6 white bars ; primaries spotted with white ; lesser wing-coverts 
reddish, like under parts. Tail of young dusky, numerously barred with whitish ; under parts 
whitish, streaked with dusky. Less robust ; wing usually under 14.00 ; tarsus slender. N. Am., 
abundant lineatxis 520, 521 
Tail of adult black, with 3 broad white zones on inner webs only of the feathers, ashy on outer webs ; 
plumage black, spotted or not with white. Tail of young dusky, inner webs mostly white, 
black-barred. Southwestern U. S abbreviatus 522 
Three outer primaries emarginate or sinuate on inner webs. 
Tail numerously and narrowly cross-barred with lighter and darker. Plumage extremely variable, 
but not extensively reddish underneath, nor cheeks with a dark mustache. Large ; wing usually 
over 13.00. Chiefly western U. S., abundant swainsoni 523 
Tail of adult blackish with about 3 light gray bands exposed ; under parts extensively rufous ; 
a dark moustache. Small ; wing under 12.00. Eastern IT. S., common .... 2J<^i^i^sylvanicus 524 
Tail (of adult ?) crossed with numerous light and dark bars (6-8 of each); general color fuliginous, 
scarcely or not varied. Southwestern U. S brachyurus 882, 883 
* Heavy-weights ; 5 outer primaries cut. 
512. B. unicin'ctus liar'risi. (Lat. uni-, once; cinctiis, girdled. To Edw. Harris.) Harris's 
Buzzard. Adult ^ 9 * General plumage blackish, more or less intense, sometimes rather 
dark chocolate-brown, blackening on wings and tail, but in any case pretty uniform over tli(^ 
whole body. Lesser and part of middle wing-coverts, lining of wings, and the tibi£e, brownish- 
red, or rich chestnut. Tail-coverts and base of tail broadly white, thus girdling the whole 
figure ; end of tail also white for an inch or more. Length of ^ about 20.00; extent 41.00- 
46.00; wing 12.50-13.50 ; tail 8.50-9.50; tarsus 3.00-3.25 ; middle toe without claw 2.00. 
9 larger; about 23.00; extent 43.00-47-00; wing 13.50-14.50; tail 9.50-10.50. Young: 
Less decidedly blackish, the upper parts varied with rusty-brown, lower quite tawny with 
dusky spots or streaks, chestnut of wings not unbroken, and white of tail less distinctly defined. 
Tibife tawny-white, distinctly barred with chestnut. But in any plumage the species is un- 
mistakable, forming a separate subgenus from Biiteo proper, by some ranked as a genus ; 
the loral region is extensively denuded to the eye, and furnished with short radiating bristles. 
In some respects it resembles Pobjboriis, being a sluggish, carrion-feeding bird, usually found 
associated with the caracara, turkey-buzzard, and black vulture. Tt is a common inhabitant of 
the warmer parts of America and over our Mexican border ; abundant in some parts of Texas. 
Nest in a tree or bush; eggs commonly 2, measuring 2.00-2.10 X 1-70, white or whitish, 
unmarked or with faint brownish-yellow. (Parabuteo Bidg. Erytlirocnema Sharpe.) 
** Heavy-weights ; 4 outer primaries cut. 
513. B. albocauda'tus. (Lat. aZ6M5, white ; mwcZafws, tailed.) White-tailed Buzzard. Adult 
$ 9 '• Tail and its coverts white, with a broad black subterminal zone, with numerous 
