FALCONIDHS — THE FALCONS. 
131 
9 • Above fulvous-rufous, the whole breast and sides with longi- 
tudinal dashes of a lighter tint of the same. Hab. Continent of 
North America, north of Panama (except Caribbean and Gulf 
coast.) ( 'Sparrow Hawk.') 
var. sp arv enus. 
£. Head above, and wings, dark bluish-plumbeous; several outer 
tail-feathers variegated. Vertex without any rufous. Anterior 
portions beneath deep ochraceous, without spots. Tail without 
indication of bars anterior to the subterminal one ; black bars 
above confined to larger scapulars. 9- Above ferruginous, with 
the black bars broader and blacker than in either of the preceding. 
Hab. Gulf, Caribbean, and Atlantic coasts of tropical continental 
America (Florida to Cayenne). ( Florida Sparrow Hawk.) 
var. is ab ellinus. 
Genus POLYBORUS, Vieillot. (Page 123.) 
P. tharus. Wing, 14.50-17.70; tail, 8.50-10.00; culmen, 1.20-1.48; 
tarsus, 3.20-4.20; middle toe, 1.75-2.30. 
Adult. Forehead, crown, occiput, back, rump, abdomen, sides, and 
tibiae, and terminal zone of the tail, dull black. Neck, breast, tail- 
coverts, and tail, dingy- whitish. Interscapulars, breast, and tail with 
transverse dusky bars. 
Young . Blackish areas and markings replaced by dull brown ; region 
of the transverse bars marked, instead, with longitudinal stripes. 
Adult. Whole body, with middle wing-coverts, variegated with 
transverse bars of black and white ; tail-coverts barred. Terminal 
zone of the tail about 2.00 wide. Young. Longitudinal stripes 
over the whole head and body, except throat, cheeks, and tail- 
coverts ; tail-coverts transversely barred. Hab. South America. 
( Caracara Eagle. ) var .tharus. 
Adult. Transverse bars confined to the breast and interscapulars ; 
rest of body continuous black; tail-coverts without bars; wing- 
coverts unvariegated. Terminal zone of tail about 2.50 wide. 
Young. Longitudinal stripes confined to the breast and inter- 
scapulars ; rest of the body continuous brown. Tail-coverts with- 
out bars. Hab. Middle America, and southern border of United 
States, from Florida ty^Capp St. Lucas. ( King Buzzard.) 
var. auduboni. 
Subfamily B U T E O N I N jE . 
Genus PANDION, Savigny. (Page 124.) 
P. haliaetus. Second or third quills longest. Above clear dark grayish- 
brown, inclining to brownish-black, plain, or variegated with white. Tail 
brownish-gray (the inner webs almost entirely white), narrowly tipped 
with white, and crossed by about six or seven nearly equal bands of dusky- 
black. Head, neck, and entire lower parts, snowy-white ; the breast with 
or without brown spots or wash. A dusky stripe on side of head (from 
