HETEROSPIZIAS.—HARPYHALIAETUS. 87 
1. Heterospizias meridionalis. 
Rufous-headed 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. 
il. p. 189*; Zeledon, An. Mus. Nac. Costa Rica, p. 126°; Sharpe, Hand-l. Birds, i. p. 254°. 
Circus rutilans, Swains. Phil. Mag. new ser. i. p. 366". 
Griseo-brunneus, pileo ferrugineo; collo postico ferrugineo, griseo transfasciato; tectricibus 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 nigricanti- 
brunneo transfasciatis ; tibiis, subcaudalibus et subalaribus ferrugineis, fere immaculatis. Long. tota — 
circa 18:0, ale 6:0, caude 7:5, culm. 1°4, tarsi 3°8. (Descr. exemp]. ex Veraguas. Mus. nostr.) 
Hab. Mexico (Bullock’, Mus. Brit.*); Costa Rica (Zeledon®); Panama, Santa Fé 
(£. Arcé)—Sovutn America, Colombia+, Ecuador ®, Guiana ®% Venezuela®, Ama- 
zonia *, Brazil 6, 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 doubtful. Neither is the information exact as to the capture of this Hawk 
in Costa Rica, 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 Arcé. 
HARPYHALIAETUS. 
Harpyhaliaetus, Lafresnaye, Rev. Zool. 1842, p. 173; Sharpe, Cat. Birds Brit. Mus. i. p. 221. 
Urubitornis, Verreaux, P. Z. 8. 1856, p. 145. 
Plangus, Sundev. Ofv. Vet.-Akad. Foérh. 1874, p. 28; Sharpe, Bull. B. O. C. vi. p. xii. 
In appearance the two species comprised in this genus closely resemble those of 
Urubitinga, especially in the rufous and black coloration of the young birds, which 
are very similar to those of U. zonura and its allies. In the crested head Harpy- 
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 Urubitinga, and not so 
powerful or Eagle-like as that of the Harpy (Zhrasaetus). 
Two species of Harpyhaliaetus are recognized—a pale grey form with a longer crest, 
H. coronatus, inhabiting Patagonia, Bolivia, and Southern Brazil; while a darker one, 
H. solitarius, with a shorter crest, ranges from Chile to Colombia and Central America. 
1. Harpyhaliaetus solitarius. 
Circaetus solitarius, Tsch. in Wiegm. Arch. 1844, p. 264°; Faun. Per., Vog. p. 94, t. 27. 
Urubitornis solitaria, Verr. P. Z.S. 1856, p. 145°; Salv. P. Z. S. 1870, p. 214 *. 
Harpyhaliaetus solitarius, Gurney, Ibis, 1876, p. 490°. 
Harpyhaliaetus coronatus, Sharpe, Cat. Birds Brit. Mus. 1. p. 221 (partim) °*. 
