76 FALCONID. 
built of fresh twigs, and is usually placed at a considerable height on a cotton-wood 
tree. The eggs vary from two to three in number, and are usually white, but Bendire 
mentions examples which had a few buff-brown spots near the larger end. 
The food consists of small rodents, birds, lizards, and insects. 
RUPORNIS. 
Rupornis, Kaup, Classif. Siug. u. Vég. p. 120 (1844). 
Asturina, partim, Scl. & Salv. P. Z. S. 1869, p. 129, et auctt.; Sharpe, Cat. Birds Brit. Mus. i. p. 202. 
The members of the genus Rupornis are in structure very closely allied to those of 
Asturina, with which Dr. Bowdler Sharpe has united them; but they are browner, 
and thus resemble the species of the genus Buteo in general appearance. ‘There is but 
slight variation in colour between the old and young birds. The first five primaries 
are excised on the inner web, and the species are also recognizable by their rufous 
inner quill-lining. One of the species of Rupornis is found throughout Central 
America. 
1. Rupornis ruficauda. 
Falco magnirestris (nec Gm.), Licht. Preis-Verz. Mex. Vég. p. 3 (1830), ¢f. Cab. J. f. Orn. 1868, 
p. 581; Wagler, Isis, 1831, p. 517°. 
Asturina magnirostris (nec Gm.), Scl. P. Z. 8. 1856, p. 285°; Moore, P. Z. S. 1859, p. 52°; Sel. 
P. Z. S. 1859, p. 368°; Scl. & Salv. Ibis, 1859, p. 217°; Cass. Proc. Ac. Phil. 1860, p. 182’; 
Lawr. Ann. Lye. N. Y. vii. p. 316°; Scl. P. Z. 8S. 1864, p. 178°; Lawr. Ann. Lye. N. Y. 
viii. p. 178°; Salv. P. Z. S. 1867, p. 158"; Lawr. Ann. Lyc. N. Y. ix. pp. 134 %, 207”; 
v. Frantz. J. f. Orn. 1869, p. 869”. 
Asturina ruficauda, Scl. & Salv. P. Z. S. 1869, p. 183°; Ex. Orn. t. 88%; Salv. Ibis, 1869, 
p. 3177; P.Z.S. 1870, p. 215"; Scl. & Salv. P. Z. 8. 1870, p. 838 “ ; Sharpe, Cat. Birds 
Brit. Mus. i. p. 205”; Salv. P. Z. S. 1883, p. 426°; Boucard, P. Z. S. 1883, p. 456”; 
Salv. Ibis, 1885, p. 193”; 1889, p. 374 **; 1890, p. 89”. 
Buteo (Rupornis) magnirostris, var. ruficauda, Ridgw. Proc. Bost. Soc. N. H. xvi. pp. 25, 47, 49”. 
Rupornis ruficauda, Nutting, Proc. U. S. Nat. Mus. v. p. 403%, vi. pp. 877, 388”, 395°; 
Zeledon, An. Mus. Nac. Costa Rica, 1887, no. 126”; Ridgw. Proc. U. 8. Nat. Mus. x. 
pp. 583°, 593 °°; Stone, Proc. Ac. Phil. 1890, p. 204°*; Cherrie, Auk, 1892, p. 328”; 
Richm. Pr. U. 8S. Nat. Mus. xvi. p. 521 °°; Sharpe, Hand-l. Birds, i. p. 257 *. 
Buteo (Rupornis) magnirostris, var. griseocauda, Ridgw. Proc. Bost. Soc. N. H. xvi. pp. 25, 47, 48 °°, 
Rupornis magnirostris, var. griseocauda, Lawr. Bull. U. S. Nat. Mus. no. 4, p. 39°. 
Asturina magnirostris, var. griseocauda, Sumichr. La Nat. v. p. 236”. 
Rupornis ruficauda griseicauda, Ridgw. Proc. U. S. Nat. Mus. viii. p. 94". 
Rupornis magnirostris griseocauda, Ferrari-Perez, Proc. U. S. Nat. Mus. ix. p. 167°; Richmond, 
op. cit. xviii. p. 628”. 
Rupornis griseicauda, Sharpe, Hand-l. Birds, i. p. 258 ™. 
Rupornis gracilis, Ridgw. Proc. U. 8. Nat.’Mus. viii. p. 94°; Sharpe, Hand-l. Birds, i. p. 257“. 
Rupornis magnirostris gracilis, Ridgw. Proc. U.S. Nat. Mus. viii. p. 578 ”. 
