FALCO. 117 
Nat. Mus. x. pp. 583, 592°; Cherrie, Auk, 1892, p. 3277; Richmond, Pr. U. S. Nat. 
Mus. xvi. p. 520”; xviii. p. 628”; Salvad. Boll. Mus. Zool. Torino, xiv. no. 339, p. 11”; 
Nelson, N. Am. Fauna, no. 14, p. 38”. 
Falco aurantius, Licht. Preis-Verz. Mex. Vég. p. 3” (ef. J. £. Orn. 1863, p. 587") (ex Latham). 
Hypotriorchis aurantius, Lawr. Ann. Lye. N. Y. ix. p. 207. 
Supra schistaceus, plumis medialiter nigro obscuratis, rhachidibus nigro valde indicatis ; pileo et facie laterali 
nigerrimis, concoloribus ; remigibus nigris, intus vix albo fasciatim notatis; rectricibus nigtis, griseo vel 
albido 4- vel 5-fasciatis ; gutture et prepectore albis, hoc rufo lavato ; pectore toto et hypochondriis nigris, 
albo transversim fasciatis ; abdomine, tibiis et subcaudalibus saturate castaneis, concoloribus ; subalaribus 
et axillaribus nigris, maculis ovatis ochrascenti-albis notatis; cera et plaga nuda orbitali flavis; pedibus 
pallide aurantiacis; iride saturate brunnea. Long. tota circa 9-0, ale 7-1, caude 3:4, culm. 0°65, 
tarsi 1-2. (Descr. maris ex fl. Escondido, Nicaragua. Mus. nostr.) 
2 ad. mari similis, sed major, pectoris fasciis transversis rufescentioribus et latioribus. Long. tota 10-0, 
ale 8-2. (Descr. feminz ex fl. Escondido, Nicaragua. Mus. nostr.) 
Hab. Mexico (Deppe & Schiede?*), Sierra Madre, Sinaloa, Mazatlan, Tres Marias 
Islands (Grayson* 175), Santa Efigenia, Tapanatepec, Cacoprieto, Orizaba, 
Mirador, Vera Cruz (Sumichrast "), Playa Vicente (Boucard +), Altamira, 
Tampico (Armstrong *°), Yucatan (Gauwmer), Merida (Schott 28), Chichén Itzé 
(Chapman*); GUATEMALA (Constancia2, Skinner®); Honpuras, Ruatan Island 
(Gaumer 1°, Townsend), San Pedro (Whitely*), Segovia River (Townsend 2°) ; 
Nicaragua, Escondido River (Richmond 22); Costa Rica (Carmiol!), San José 
(Cherrie*1), La Palma de San José, Pozo Azul de Pirris (Zeledon 18); PANAMA, 
Line of Railway (M*Leannan ‘), Calovevora !°, Volcan de Chiriqui!°, Santa 
Fé° (dAreé), Punta de Sabana (Festa 24) —Sourn America generally, excepting 
the extreme south 1°, 
| Though, like other Falcons, somewhat difficult to procure, [’. rufiqularis is widely 
distributed throughout South and Central America, extending as far north as the 
State of Sinaloa in Mexico. In Guatemala and Costa Rica the species is less plentiful, 
and we did not meet with it in the former country. A favourite hunting-ground is in 
the clearings of the forest, where, perched on a dead tree, the bird observes and pounces 
on its prey. The food consists of birds, grasshoppers, &c., and Mr. Richmond records 
an instance of one capturing a large moth, which was flitting over the tree-tops, on the 
Escondido River, in Nicaragua 22, These accounts of the habits of F. rufiqularis 
suggest an alliance with the Hobby, but the rapid flight resembles that of the Peregrine, 
while in the noisy cry it is like the American Kestrel (Linnunculus sparverius) and the 
“ Kill-deer Plover” (gialitis vociferans) 22. 
The nest and eggs are unknown. 
4. Falco deiroleucus. (Tab. LXVI.) 
Falco deiroleucus, Temm. Pl. Col. 348°. 
Hypotriorchis detroleucus, Salv. Ibis, 1861, p. 3547; P. Z. 8, 1870, p. 215°; Lawr. Ann. Lye. N. Y. 
ix. p. 184°; v. Frantz. J. f. Orn. 1869, p. 369°. 
Falco aurantius, Gm. Syst. Nat. i. p. 283 (?)°; Sharpe, Cat. Birds Brit. Mus. i. p. 4027. 
