MOEPHNUS. — THEASAETUS. 89 



subtuB albidus, pectore griseo,abdomine toto, tectricibus subcaudalibus et tibiis eparsim fusco trans- 

 fasciatis ; subalaribus albis ; remigibus nigris, albo oblique transfasciatis ; canda nigra, albo terminata et 

 supra griseo quadrifaseiata ; rostro nigro, pedibus flavis. Long, tota circa 30'0, dae 17-0, eaudse 15-0, 

 tarsi 4'7. (Descr. exempl. ex Lion Hill, Panama. Mus. nostr.) 



Hah. Panama, Lion Hill {M'Leannan), R. Truando (C. J. Wood\ A. Schott^).—^ovTR 

 America from Colombia'' to Guiana^ and Amazonia^. 



M. guianensis is an inhabitant of the dense forests of the Amazon Valley, and we 

 have examples in our collection from British Guiana and Colombia. 



M'Leannan sent us a specimen from Panama, and Mr. C. J. Wood shot another on 

 the Truando River in the same province. He writes : — " Only observed on one 

 occasion on the Rio Truando, at the first camp after leaving the Atrato. I noticed 

 this Eagle at first perched in a high tree, but after I had fired at a small bird, he 

 immediately flew very rapidly and fiercely direct towards the spot where I was standing, 

 as though he intended to pounce upon me. He approached to within a few feet, when 

 I killed him with small shot." This, so far as we know, is the first recorded instance 

 of the occurrence of the species in Central America. 



THRASAETUS. 

 Harpijia, Vieillot, Anal. p. 24 (1816). 



Thrasaetus, Gray, P. Z. S. 1837, p. 108; Sharpe, Cat. Birds Brit. Mus. i. p. 223; Ridgw. Bull. 

 U. S. Geol. Surv. ii. p. 145. 



Although amongst the fiercest and most powerful of Birds of Prey and resembling 

 in appearance the true Eagles, the Harpy is, from the structure of its feet, a gigantic 

 Buzzard, having the hinder part of the tarsus plated instead of reticulated. It is more 

 heavily built than Morphnus ; the tail, too, is shorter, being only about three-fourths 

 the length of the wing. The foot is strong and massive ; the tarsus comparatively short 

 and Aquiline, less than twice the length of the middle toe. On the centre of the nape 

 of the neck is a long crest of broad feathers, accompanied by a well-developed frill, 

 which the bird elevates when enraged. 



1. Thrasaetus harpyia. 



VuUur harpyia, Linn. Syst. Nat. i. p. 121 '. 



Thrasaetus harpyia, Scl. & Salv. Ibis, 1859, p. 215'; P. Z. S. 1864, p. 368'; Lawr. Ann. 

 Lye. N. Y. vii. p. 461 * ; Bull. U. S. Nat. Mus. do. 4, p. 39 ' ; v. Frantz. J. f. Orn. 1869, 

 p. 368 ' ; Sharpe, Cat. Birds Brit. Mus. i. p. 224 ' ; Ridgw. Bull. U. S. Geol. Surv. li. p. 145 ' ; 

 Boucard, P. Z. S. 1878, p. 44°; Sumichrast, La Nat. v. p. 236"; Cherrie, Auk, 1892, 

 p. 328 " ; Bendire, Life Hist. N. Amer. Birds, i. p. 270 " ; Sharpe, Hand-1. Birds, i. p. 259 ". 



Falco destructor, Daud. Traite, ii. p. 60 ". 



Harpyia destructor, Lawr. Ann. Lye. N. Y. ix. p. 145 ". 



Falco imperialis, Shaw, Gen. Zool. vii. p. 52, t. 15 ". 



Harpyia imperialis, Sw. Phil. Mag. new ser. i. p. 366 ". 



Supra nigricans, tectricibus supracandibus albo terminatis; capita toto et cervice schistaceis, plumis cristse 



BIOL, cente.-amek., Aves, Vol. HI., January 1901. 12 



