146 
Falco jacquivi Gm. S. N. i, 1788, 251. 
Falco cristatus Gm. L c. 2(50. 
Falco destructor Daud. Tr. ii, 1800,60. — Temm. PI. Col. i, 1824, pi. 14. 
Harpyia destructor Cuv. Reg. An. i, 1817,1117. — Hallowell, Pr. Ac. Nat. Sci.J'liiiad. 
1846, 84-88 (anatomy and osteology).—D’O eb. Voy. Am. Merid. Ois. 1847, 81. 
Burm. Tb. Bras, ii, 1856,59. 
Nothrophrontes destructor Glog. Handb. Naturg. 1842,219. 
ATorphnus destructor Licht. Nomencl. 1S54, 2. 
Falco imperialis Shaw, Gen. Zool. vii, 1809, 52, pi. 15. 
Harpyia imperialis Stefii. Zool. xiii, 1826,17. 
Falco reyalis Shaw, 1. c. 56. 
Falco caracca Siiaw, Z. c. 64. 
Falco calquin Molina, St. Chile, 1810, 220. 
Harpyia maxima Vieill. Euc. M6th. iii, 1823,1249. 
Harpyia ferox Less. Tr. 1831, 50. 
UAigle lmpe da Bresil Briss. Orn. i, 1760, 446. 
Caracca Falcon Lath. Gen. Synop. i, 1781, 81. 
Crested Eayle Latham, Synop. i, pt. i, 1781,6,7 (in part). 
Crested Falcon Dillon, Trav. Spain, 1782, 80, pi. 3. 
Grand Aie/le de la Guiane Maud. Enc. Moth, iii, 1784, 1250. 
Crowned Vulture Latham, Syn. Supp. 1787, 5. 
L’Ouira ouassou Sonn. ed. Buffon N. H. xxxviii, 1S06, 47, pi. 7, fig. 1. 
Hob .—The whole of tropical America, south to Bolivia and Paraguay 
and north to Middle Mexico; Mirador and Tehuantepec, Mexico (Nat. 
Mus.) ; Costa Rica (Nat. Mus.) ; British Guiana (Be. Mus .fide Siiarpe). 
Wing, 21.00-24.50; tail, 16.00-18.50; culmen. 1.80-2.20 ; tarsus, 4.50- 
5.00 ; middle toe, 2.85-3.80; hind claw, 2.25-3.00; outer claw, 1.10-1.30. 
Adult: —Entire upper parts and jugulum plain brownish-black, the jugu¬ 
lar patch abruptly terminated posteriorly, with a convex outline, and 
sharply defined against the white of the remaining lower parts. Tibke 
barred with black—elsewhere beneath usually immaculate. Head and 
neck uniform ashy, paler on the throat, darker on the crest. Tail crossed 
by about four bands of mottled ashy, nearly as wide as the black ones. 
Young :—Above light ash,marbled with blackish. Tail deep ash, marbled 
with black—this disposed into about five broken bands on the middle 
feathers, but confused on the others ; secondaries and primaries mottled 
with dusky. Head, neck, and lower parts White, the long crest-feathers 
and the breast tinged with pale ashy. 
A young male from the Isthmus of Tehuantepec (No. 54,224, Nat. 
Mus., October 8, 18G8; F. Sumichrast) differs from the description of 
the young as above in the following particulars. Only the middle pair 
of tail-feathers are colored as described, they having five bands each of 
dark ashy and black, the bauds of the two colors about equal in width, 
the former terminal. The other tail-feathers are wholly gray, less 
glaucous than the intermedia?, very indistinctly mottled with darker, and 
without trace of transverse bands, except an approximation to a sub¬ 
terminal one in the presence of a blackish spot next to the shaft near 
the end of each feather. The bird is evidently in transition-plumage, 
so that the intermedia probably represent the adult dress, and the 
other rectrices the first plumage; traces of the coming adult livery are 
seen in the admixture of numerous black feathers among the lesser 
wing-coverts and scapulars, the longer crest-feathers, and across the 
jugnlum, portions which are entirely black in the adult. Some of the 
feathers of the lower parts are tinged with ocliraceous, but whether 
this is natural or caused by the stain of ochreous earth, is doubtful. 
According to Professor Sumichrast’s notes on the original label, the iris 
is dark brown, cere and bill black, and the feet yellowish-white. 
List of specimens examined. —Nation nl Museum, 4; Phil nil . Acad., 2; mus. G. N. Law¬ 
rence, 1 ; Boston Soc., 2; total number of specimens examined, 9. 
