552 SYSTEM A TIC SYNOPSIS. — RAPTOMES— A CCIPITRES 
with extensive white areatioii, which characters increase on the secondaries. Iris brown ; cere 
and feet bright yellow; bill and claws blue-black. Wing of $ 10.00; tail 7.00 ,: tarsus 2.75 ; 
middle toe without claw 1.50. Wing of 9 11.00 ; tail 8.00. Young : Blackish-brown above, 
much variegated with reddish-buff, the white upper tail-coverts spotted with blackish ; below, 
whitish, dashed with large blackish marks, the flags barred ; tail dark browm, with numerous 
narrow blackish bars. Cent. Am. and Mex., regularly into southwestern U. S., occasionally 
up the Mississippi Valley to Illinois. Nest in trees or bushes, not peculiar; eggs 2, round- 
oval, colorless, 2.00 X 1-60. 
183. URUBITIN'GA. (S. Am. wrw&w, a vulture ; ^m^/a, bright.) Anthracite Buzzards. Gen- 
eral chars, of Biiteo, but system of coloration peculiar, the adults being chiefly black and white, 
the tail typically broadly zoned. The limits of the genus vary with different writers ; it 
contains several species, confined to America, one of them reaching our border. In this the 
tail is about | as long as the wing, emarginate or nearly even ; the wing with 3d-5th quills 
longest, 2d about equal to 6th, 1st very short ; outer 4 sinuate on inner webs ; the point of the 
folded wing reaching but little beyond the longest secondaries ; the bill lengthened and rather 
weak ; the tomia of the upper mandible strongly festooned or almost lobated back of the hook ; 
gonys convex ; nostrils large, subcircular ; lores extensively denuded ; tarsus much longer than 
middle toe and claw, feathered but a little way down in front, scutellate before and behind, 
reticulated laterally like the basis of the toes, which in the rest of their length are broadly 
scutellate. 
538. U. anthraci'na. (Lat. anthracinus, carbuncular ; in this case coal-black.) Anthracite 
Buzzard. Adult ^ 9 : Coal-black ; feathers of head and neck with concealed white bases ; 
tail white at extreme base and tip, and crossed about the middle with a broad white zone ; ends 
of coverts white ; quills of wing more or less mottled with rusty-brown ; cere, rictus, and base 
of bill, and feet, yellow; bill and claws blackish. Length about 23.00; wing 13.00-15.00; 
tail 8.00-10.00 ; tarsus 3.25 ; 9 larger than ^. Young : Extensively varied with rusty or buff, 
which is gradually obliterated as the bird matures ; tail numerously barred mth black and 
white. There are G-9 such bars, mostly broken or otherwise irregular. The whole under 
parts are white, more or less tinged with buff, pencilled on the throat, heavily striped on the 
breast and sides, closely barred across on the tibiae and crissum, with blackish. The feathers of 
the head, nape, and foreback are largely white or whitish, appearing in streaks among the over- 
lying blackish of the ends of the feathers. The exposed portions of the primaries are blackish, 
obsoletely crossed with lighter; these feathers lightening basally and internally, where narro'w 
blackish bars alternate with wider spaces of white tinged with brown and fulvous. The 
secondaries and larger coverts are brown with narrow dark bars, their inner webs also indented 
with whitish and taM^ny. The younger the bird the more the whitish or buff prevails over the 
dark colors. The contrast between the cross-barred tibiae and the lengthwise -striped breast 
and sides is always notable. The tail varies from rounded through square to emarginate. 
A remarkable hawk of Cent. Am., W. I., and Mex., lately ascertained to occur in Arizona. 
184. ONY'CHOTES. (Gr. ovv^, ovvxoi, onux, onuchos, a claw, and a suffix -tj;?, -tes.) Clawed 
Buzzard. ''Bill short, the tip remarkably short and obtuse, and only gradually bent ; cere 
on top about equal to culmen ; very broad basally in its transverse diameter, and ascending in 
its lateral outline, on a line with the culmen ; commissure only faintly lobed. Nostril nearly 
circular, with a conspicuous (but not central or bony) tubercle ; cere densely bristled below tlie 
nostril, almost to its anterior edge; orbital region finely bristled. Tarsus very long and slen- 
der, nearly twice the length of the middle toe ; toes moderate, the outer one decidedly shorter 
than the inner ; claws very long, strong, and sharp, curved in about one-quarter the circumfer- 
ence of a circle. Tibial feathers A^ery short and close, the plumes scarcely reaching below the 
ioint. Feathers of the forehead, gular region, sides and tibiae with white filamentous attach- 
ments to the ends of the shafts. Wing very short, much rounded, and very concave beneath ; 
