146 



Falco jacquini Gm. S. N. i, 1788, 251. 



Falco cristatus Gm. ?. c. 260. 



Falco destructor Daud. Tr. ii, 1800, 60.— Temm. PL Col. i. 1824, pi. 14. 



Harpyia destructor Cuv. Eeg. Ad. i, 1817, 317. — Hallowell, Pr. Ac. Nat. Sci. Phiiad. 



1846, 84-88 (anatomy and osteology).— D'Okb. Voy. Am. Merid. Ois. 1847, 81.— 



BuRM. Th. Bras, ii, 1856, 59. 



Nothroplirontes destructor Glog. Handb. Naturg. 1842,219. 



Morplinus destructor LiCHT. Npmeucl. 1^54, 2. 

 Falco imperialis Shaw, Geu. Zool. Vii, 1809, 52, pi. 15. 



Harpyia imperialis Steph. Zool. xiii, 1826, 17. 

 Falco regalis Shaw, I. c. 56. 

 Falco caracca Shaw, I, c. 64. 

 Falco calquin Molina, St. Chile, 1810, 220. 

 Harpyia maxima Vieill. Enc. M^th. iii, 1823, 1249. 

 Harpyia ferox Less. Tr. 1831, 50. 

 L'Aigle liupe du 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 Aigle de la Guiane Maud. Enc. Meth. iii, 1784, 1250. 

 Crowned Vulture Latham, Syn. Snpp. 1787, 5. 

 L'Oui)-a ouassou Sonn. ed. Button N. H. ssxviii, 1806, 47, pi. 7, tig. 1. 



Rah. — The whole of tropical America, south to Bolivia and Paraguay 

 and north to Middle Mexico; Mirador and Tehuantepec, Mexico (Nat. 

 Mus.); Costa Eica (±sat. Ml's.); British Guiana (Br. Mus./<7e Sharpe). 



Wing, 21.00-2^.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. Tibisne 

 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 (Xo. 54,224, Xat. 

 Mus., October 8, 1868 ; F. Sumichrast) differs from the descrii)tion of 

 the young as above in the following particulars. Only the middle pair 

 of tall-feathers are colored as described, they having fiv^e bands each of 

 dark ashy and black, the bands of the two colors about equal in width, 

 the former terminal. The other tail-feathers are wholly gray, less 

 glaucous than the intermedife, 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 intermedi?e probably represent the adult dress, and the 

 other rectrices the first plumage; traces of the coming adult livery are 

 seen in the admixtnre of numerous black feathers among the lesser 

 wing-coverts and scapulars, the longer crest-feathers, and across the 

 jugulum, portions which are entirely black in the adult. Some of the 

 feathers of the lower parts are tinged with ochraceous, 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. — National Musenm, 4 ; Phiiad. Acad., 2; mns. G, N. Law- 

 rence, 1 ; Boston Soc, 2 ; total nnmher of specimens examined, 9. 



