145 



Genus THRASAETUS, Gray. 



Harpia Vieili.ot, Analyse, 1816, 24. Type, iHilco harpyia Linx. (i\ot of Oschenh. 1810). 



Harpy ia Cuvier, 1817. Same type. 



Thrasaetus Gray, P. Z. S. 1837, 108. Same type. 



JSethrophronies Gloger, Handb. Natnrs. 1842,219. Same type. 



Anopaia Halde.man, Pr. Ac. Nat. Sci. Philad. 1842, 188. Same type. 



Ch. — Form that of Sjiisaetus, but organization move robust through- 

 out, and tarsi almost entirely bare. Bill robust (similar to that of 

 Sjrizaetus coronatus) ; arch of the culmen forming about one-third the 

 circumference of a circle, but the terminal curve rather abrupt, the tip 

 inclining backward ; upper tomium moderately lobed. Xostril oval, 

 obliquely vertical, beveled off anterior)}- to the edge of the cere. Feet 

 exceedingly robust and powerful ; tarsus less than twice the length 

 of the middle toe ; lateral toes nearly equal, the outer not appreciably 

 longer than the inner, and very conspicuously weaker ; middle toe ex- 

 ceeding the lateral toes by the length of its terminal phalanx; hind toe 

 robust and powerful, nearly equal to the inner. Claws large, i)owerful, 

 but rather obtuse, greatly graduated in size, the outer being scarcely 

 more than one-third the inner in length ; inner and posterior claws equal 

 to their digits. Web between outer and middle toes well developed. 

 ScutelUe of tarsi and toes rough, and very irregular; they are generally 

 of irregular hexagonal shape, and small, but they enlarge into trans- 

 verse plates on the toes (except the basal phalanx), and on the front of the 

 tarsus, where they form a short series of about ten broad scutellte ; those 

 of the posterior face are much larger, but very irregular both in size 

 and arrangement, but they form a somewhat interrupted, and some- 

 times double series, which twists to the outer side toward the lower por- 

 tion. Plumage generally full, the feathers broad and soft, with gently 

 convex tips. Lores scantily bristled ; tibite clothed with close, com- 

 pact, very short feathers, extending in front over the upper half of the 

 tarsus. Feathers of the posterior portions of the head and neck greatly 

 developed, the occipital plumes much elongated, forming a broad, 

 depressed crest, erectile at pleasure, those of the sides and hinder part 

 of the neck forming when erected a broad ruff. Wing very short; 

 primaries not reaching beyond the secondaries. Fifth, sixth, or seventh 

 primaries longest ; first shortest ; outer seven with their inner webs 

 very shallowly sinuated, the sinuation being perceptible on the last. 

 Tail very long, nearly equal to the wing, even, the feathers strong and 

 broad. 



THEASAETUS HAEPYIA. 



HAEPY EAGLE. 



?Aqmla cristata Brissox, Orn. 1760, 446. 

 VuUitr harpyia Linx. S. X. i, 1766, 446 (Adult.) 

 Falco harpyia Gm. S. N. i, 1788, 2.51. 

 Gi/pactiis harpyia Datd. Tr. ii, l.-OO, 27. 



Thrasai^tus harpyia Gray, P. Z. S. 1837, 108; Geu. i, 1845, 15, Hand List, i. 1869, 16. 



— BoxAP. Coiisp. i, 18.50, 29. — Strickl. Oru. Svn. i, 18.55, 26. — Lawr. Ann. Lye. 



N. Y. 1862, 7 (New Granada).— ScL. & Salv. P. Z. S. 1864, m^ (Istb. Panama) ; 



Nom. Neotr. 1873, 120.— Sharpe, Cat. Ace. B. M. 1874, 224. 



Morphnus harpyia Cab. & T.schudi, Arch. f. Naturg. 1844, 96, 265.— Pei.z. Orn. Bras. 



1871, 4, 397. 

 Astur harpyia Sciii.. Mus. P.-B.. Astures, 1862,2.^. 



Morphnus ( Thrasai'tus) harpyia EiDGW. Proc. Boston Soc. Nat. Hist. 1873, 72. 

 Vitltur coronatus Jacq. Beitr. n84, 1.5. 



Gypai-tus coronatus Daud. Tr. ii, 1800, 28. 



