HETEEOSPIZIAS.— HAEPTHALIAETUS. 87 



1. Heterospizias meridioualis. 



Rufous-Tieaded Falcon, Lath. Gen. Syn., Suppl. p. 33 \ 

 Falco meridionalis. Lath. Ind. Orn. i. p. 36 ^ 



Heterospizias meridionalis, Sharpe, Cat. Birds Brit. Mus. i. p. 160 ' ; Ridgw. Bull. U. S. Geol. Surv. 

 ii. p. 139 * ; Zeledoiij An. Mus. Nac. Costa Rica, p. 126 ' ; Sharpe, Hand-1. Birds, i. p. 254°. 

 Circus rutilans, Swains. Phil. Mag. new ser. i. p. 366 ''. 



Oriseo-brunneus, pileo ferrugineo ; collo postico ferrugineo, griseo transfasciato ; teetricibus alarum minoribus 

 et medianis ferrugineis ; remigibus ferrugineis, late nigro terminatis ; cauda nigra, albo terminata et 

 fascia unica alba mediana transnotata : subtus ferrugineus, pectore et abdomine summo nigiicanti- 

 brunneo transfasciatis ; tibiis, subcaudalibus et subalaribus ferrugineis, fere immaculatis. Long, tota 

 circa 18"0, alse 6-0, caudse 7'5, culm. 1-4, tarsi 3*8. (Desor. exempl. ex Veraguas. Mus. nostr.) 



Sab. Mexico {Bullock^, Mus. Brit.^); Costa Rica {Zeledon^); Panama, Santa Fe 

 [E. ArcS). — South America, Colombia*, Ecuador^, Guiana^, Venezuela ^ Ama- 

 zonia 3, Brazil ^, Bolivia ^, Argentina *. 



In 1827 Swainson recorded a specimen of H. meridionalis in Bullock's Museum, and 

 in the British Museum is a second example, received from Mr. Hartweg ^, both said 

 to be from Mexico. No recent collector has met with it there, and we regard these 

 records as doubtfril. Neither is the information exact as to the capture of this Hawk 

 in Costa Eica, though it is included in Zeledon's list of the birds of that country ^. 



The only positive evidence of the occurrence of this species within Central- American 

 limits rests upon the two specimens which we received from Arce. 



HARPYHALIAETUS. 



Harpy haliaetus, Lafresnaye, Rev. Zool. 1842, p. 173 ; Sharps, Cat. Birds Brit. Mus. i. p. 221. 



Urubitomis, Verreaux, P. Z. S. 1856, p. 145. 



Plangus, Sundev. Ofv. Vet.-Akad. Forh. 1874, p. 28 ; Sharpe, Bull. B. O. C. vi. p. xii. 



In appearance the two species comprised in this genus closely resemble those of 

 JJrubitinga, especially in the rufous and black coloration of the young birds, which 

 are very similar to those of TJ. zonura and its allies. In the crested head Earpy^ 

 haliaetus approaches the Harpies, and may be considered a link between them and 

 the true Buzzards. The bill is like that of a large species of UruUtinga, and not so 

 powerful or Eagle-like as that of the Harpy {Thrasaetus). 



Two species of Harpyhaliaetus are recognized — a pale grey form with a longer crest, 

 E. coronatus, inhabiting Patagonia, Bolivia, and Southern Brazil ; while a darker one, 

 E. solitarius, with a shorter crest, ranges from Chile to Colombia and Central America. 



1. Harpyhaliaetus solitarius. 



Circaetus solitanus, Tsch. in Wiegm. Arch. 1844, p. 264 ' ; Faun. Per., Vog. p. 94, t. 2^ 

 Urubitomis solitaria, Verr. P. Z. S. 1856, p. 145 ' ; Salr. P. Z. S. 1870, p. 214 *. 

 Harpyhaliaetus solitarius, Gurney, Ibis, 1876, p. 490 \ 

 Harpyhaliaetus coronatus, Sharpe, Cat. Birds Brit. Mus. i. p. 221 (partim) \ 



