BUTEO. 61 
“4, Buteo borealis, 
American Buzzard, Lath. Gen. Syn. i. pt. 1, p. 50°. 
Red-tailed Falcon, Penn. Arctic Zool. p. 205”. 
Leverian Falcon, Penn. Arctic Zool. p. 206°. 
Falco borealis, Gm. Syst. Nat. i. p. 266*; Wagler, Isis, 1831, p. 517°. 
Buteo borealis, Vieill. N. Dict. d’ Hist. Nat. iv. p. 478°; Gosse, Birds of Jamaica, p. 11, t. 2’; 
Scl. & Salv. Ibis, 1859, p. 217°; Scl. P. Z. S. 1859, pp. 868°, 389°; Scl. & Salv. P. Z. 8. 
1864, p. 369''; Dugés, La Nat. i. p. 188”; Salvin, P. Z. S. 1870, p. 215"; Sharpe, Cat. 
B. Brit. Mus. i. p. 188"*; Lawr. Bull. U. S. Nat. Mus. no. 4, p. 417°; Sumichr. La Nat. 
v. p. 286°; Herrera, La Nat. (2) i. pp. 176, 320.7; Bendire, Life Hist. N. Amer. Birds, 
p- 206, t. 6. figs. 5, 6*°; Fisher, Bull. U. 8. Dep. Agr. no. 3, p. 48, pl. 7”. 
Buteo borealis, var. borealis, Ridgw. in Baird, Brew., & Ridgw. N. Amer. Birds, iii. p. 282”°. 
Buteo harlani (nec Audub.), Scl. & Salv. Ibis, 1859, p. 217”. 
Buteo calurus, Cass. in Baird, Cass., & Lawr. Birds N. Amer. p. 22, t. 14”; Ferrari-Perez, Pr. U.S. 
Nat. Mus. ix. p. 167%; Dugés, La Nat. i. p. 188”. 
Buteo borealis, var. calurus, Ridgw. in Baird, Brew., & Ridgw. N. Amer. Birds, iii. p. 286”; Lawr. 
Mem. Bost. Soc. N. H. ii. p. 301 ™. 
Buteo borealis calurus, Belding, Pr. U. 8. Nat. Mus. vi. p. 344°"; Ferrari-Perez, op. cit. ix. p. 167°; 
Allen, Bull. Amer. Mus. N. H. v. p. 34%; Jouy, Pr. U.S. Nat. Mus. xvi. p. 787 °°. 
Buteo montanus (nec Nutt.), Cab. J. f. Orn. 1869, p. 210°; Sharpe, Cat. Birds Brit. Mus. 1. 
p. 189°. 
Buteo borealis, var. montanus, Lawr. Ann. Lyc. N. Y. ix. pp. 1383, 207”; Frantz. J. f. Orn. 
1869, p. 368 °°; Sumichr. La Nat. v. p. 286%. 
Buteo lucasanus, Ridgw. in Coues, Key N. Amer. Birds, p. 216%. 
Buteo borealis lucasanus, Ridgw. in Baird, Brew., & Ridgw. Hist. N. Amer. Birds, iii. p. 285 **. 
Buteo borealis, var. krideri, Hoopes, Ridgw. in Baird, Brew., & Ridgw. Hist. N. Amer. Birds, in. 
p. 284°. 
Buteo borealis kriderii, Ridgw. Man. N. Amer. Birds, p. 232 *. 
Buteo krideri, Gurney, List Diurn. Birds of Prey, p. 66 *. 
Buteo borealis, var. costaricensis, Ridgw. in Baird, Brew., & Ridgw. Hist. N. Amer. Birds, iii. 
p. 285%. 
Buteo costaricensis, Gurney, Ibis, 1876, p. 239". 
Buteo borealis costaricensis, Nutting, Proc. U.S. Nat. Mus. v. p. 404"; vi. p. 377“; Zeledon, An. 
Mus. Nace. Costa Rica, i. p. 126 *°. 
Buteo cooperi (nec Baird), Herrera, La Nat. (2) i. pp. 176, 320 *. 
Supra saturate fuscus, plumis nuche ad basin albis; tectricibus supracaudalibus mediis dorso concoloribus, 
lateralibus rufis ; loris albis: subtus albus, gula fusco striata, pectoris lateribus et hypochondriis maculis 
guttiformibus notatis; tibiis pallide rufis vix transfasciatis ; alis subtus griseo-albidis, vix fusco irroratis ; 
remigibus ad apicem nigricantibus; cauda castanea, fascia subterminali nigra; pedibus flavis. Long. 
tota circa 19-0, ale 145, caude 8-0, tarsi 3-3. (Descr. exempl. ex Guatemala. Mus. Brit.) 
Forma altera. Subtus rufescens, gutture et abdomine medio fuscis, tibiis fusco fasciatis (B. calurus). 
Forma tertia, Pallidior, supra albo variegata; cauda pallidiore castanea, fascia subterminali nigra, sepius 
absente: subtus fere omnino alba, tibiis vix cervino tinctis, abdomine medio striis rhachidalibus vix ullis 
(B. kridert). 
Juv. Subtus albus, gula (leviter), pectoris lateribus et abdomine medio fusco striatis; cauda rufescenti-fusca, 
frequenter fusco transfasciata. 
