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. 



KUPORNIS. 



Rupornis, Kaup, Classif. Saug. u. Vog. p. 120 (1844). 



Asturina, partim, Scl. & Salv. P. Z. S. 1869, p. 129, et auctt, ; Sharpe. Cat. Birds Brit. Mus. 1. p. 202. 



The members of the genus Rupornis are in structure very closely allied to those of 

 Asturina, with which Dr. Bowdle^ 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 magnirostris (nee Gm.), Licht. Preis-Verz. Mex. Vog. p. 3 (1830), cf. Cab. J . f. Orn. 1863, 



p. 58^ Wagler, Isis, 1831, p. 517 ^ 

 Asturina magnirostris (nee Gm.), Sel. P. Z. S. 1856, p. 285 '; Moore, P. Z. S. 1859, p. 52*; Scl. 



P. Z. S. 1859, p. 368 ° ; Sel. & Salv. Ibis, 1859, p. 217 ' ; Cass. Proe. Ac. Plul. 1860, p. 132 ' ; 



Lawr. Ann. Lye. N. Y. vii. p. 316"; Sel. P. Z. S. 1864, p. 178" ; Lawr. Ann. Lye. N. Y. 



viii. p. 178 ^° ; Salv. P. Z. S. 1867, p. 158 " ; Lawr. Ann. Lye. N. Y. ix. pp. 134 ^% 207 " ; 



V. Frantz. J. f. Orn. 1869, p. 369 ". 

 Asturina ruficauda, Scl. & Salv. P. Z. S. 1869, p. 133"; Ex. Orn. t. 88"; Salv. Ibis, 1869, 



p. 317 " ; P. Z. S. 1870, p. 215 '^ ; Scl. & Salv. P. Z. S. 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, Proe. U. S. Nat. Mus. v. p. 403", vi. pp. 377", 388'", 395 '»• 



Zeledon, An. Mus. Nac. Costa Rica, 1887, no. 126"; Ridgw. Proe. U. S. Nat. Mus. x. 



pp. 583'% 593"; Stone, Proc. Ac. Phil. 1890, p. 204"; Cherrie, Auk, 1892, p. 328"; 



Riehm. Pr. U. S. Nat. Mus. xvi. p. 521''; Sharpe, Hand-I. 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-1. Birds, i. p. 258 ". 



Rupornis gracilis, Ridgw. Proe. U. S. Nat.' Mus. viii. p. 94 " ; Sharpe, Hand-1. Birds, i. p. 257 ". 

 Rupornis magnirostris gracilis, Ridgw. Proc. U. S. Nat. Mus. viii. p. 578 ■". 



