430 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



1931, 246.— Griscom, Bull. Mus. Comp. Zool., Ixxii, 1932, 315 (Perm6, 

 Panama; crit.); Ixxviii, 1935, 301 (Perm6, Panama). 

 Morphnus guianensis taeniatus Swann, Synopt. List Aceip., pt. 2, 1919, 61. 



Genus HARPIA Vieillot 



Harpyia (not of Oschenheimer, 1810, or of Illiger, 1811) Cuvier, Regne Anim., i, 



1817, 317. (Type, by monotypy, "La Grande Harpie d'Amerique . . . 



(probablement de Falco harpyia . . . Linn.).") 

 Harpia Vieillot, Analyse, 1816, 24. (Type, by monotypy, "Aigle destrucieur, 



Soun. edit, de Buffon" = Fw/^/r harpyia Linnaeus.) 

 Harpya (emendation) Swainson, Philos. ]Mag., new ser., i, No. 5, May 1827, 366. 

 Harpeia (emendation) BoiE, Isis, 1822, 548. 

 Thrasactos "Gray" Bonaparte, Proc. Zool. Soc. London, 1837 (published June 14, 



1838), 108. (Type, by monotypy, Vultur harpya Linnaeus.) 

 Thrasaetus (emendation) Gray, Gen. Birds, i, 1845, 15. 

 Thrasyactus (emendation) Agassiz, Index Zool., 1846, 369. 

 Thrasaetur (lapsus) Kaup, in Jardine's Contr. Orn., 1849, 109. 

 Thrassaetos (emendation) Allen, Bull. Amer. Mus. Nat. Hist., xxiii, 1907, 330. 

 Anopaia Haldeman, Proc. Acad. Nat. Sci. Philadelphia, i, 1842, 188. (New 



name for Harpyia Cuvier, preoccupied.) 

 Nothrophontes Gloger, Hand-und Hilfsbuch, 1842 (1841), 219. (Type, by 



monotypy, Falco destructor Dandin—Vult^ir harpyia Linnaeus.) 

 Nothrophrontes (emendation) Sharpe, Cat. Birds Brit. Mus., i, 1874, 223. 

 Nothrophantes (emendation?) Giebel, Thesaurus Orn., ii, 1875, 723. 



Verylarge "and ''strongly built eagles (wing about 533-623 mm.)^^ 

 with wing very broad and much rounded, the longest primaries but 

 little exceeding the longest proximal secondaries; tail about three- 

 fourths as long as wing; tarsus nude for greater part, exceedingly 

 robust, less than twice as long as middle toe and covered with u-regular 

 scutella, and w^ith an occipital crest of long and very broad plumes. 



Bill moderate in size, relatively short and deep, its depth at anterior 

 margin of cere equal to about two-thirds the chord of culmen; culmen 

 strongly curved from base, forming about one-third the circumference 

 of a circle, slightly arched proximally, curved backward terminally, 

 the ma.xillary unguis moderately produced, obtuse; gonys slightly 

 convex, ascending terminally; maxillary tomium with a shallow obtuse 

 notch or indentation a little posterior to middle portion, anterior to 

 which the tomium is somewhat lower than behind, sometimes showing 

 tendency to form a shallow lobe; anterior margin of cere distinctly 

 convex; nostril obliquely vertical, oval, beveled off anteriorly to edge 

 of cere, situated about or very slightly below middle of cere. Wing 

 relatively short but very broad and much rounded, the secondaries 

 greatly developed, the primaries abbreviated, the longest scarcely 

 extending beyond tips of longest secondaries; fifth, sixth, or seventh 



1^ While not the longest winged, the primaries being relatively short and the 

 wing much rounded, the single species of Harpia is, nevertheless, much the 

 most powerful as well as the heaviest of the eagles, except, possibly one or two 

 African species. 



