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. Diet. d'Hist. Nat. iv. p. 478 'j Gosse, Birds o£ Jamaica, p. 11, t. 2'; 



Scl. & Salv. Ibis, 1859, p. 217 ' ; Scl. P. Z. S. 1859, pp. 368 \ 389" ; Scl. & Salv. P. Z. S. 



1864, p. 369"; Dug^s, La Nat. i. p. 138"; Salvin, P. Z. S. 1870, p. 215"; Sharpe, Cat. 



B. Brit. Mus. i. p. 188"; Lawr. Bull. U. S. Nat. Mus. no. 4, p. 41 " ; Sumichr. La Nat. 



V. p. 236"; Herrera, La Nat. (2) i. pp. 176, 320"; Bendire, Life Hist. N. Amer. Birds, 



p. 206, t. 6. figs. 5, 6" ; Fisher, Bull. U. S. Dep. Agr. no. 3, p. 48, pi. 7". 

 Buteo borealis, var. borealis, Ridgw. in Baird, Brew., & Ridgw. N. Amer. Birds, iii. p. 282 ". 

 Buteo harlani (nee Audub.), Scl. & Salv. Ibis, 1859, p. 217 '\ 

 Buteo calurus, Cass, in Baird, Cass., & Lawr. Birds N. Amer. p. 22, 1. 14"'; Ferrari-Perez, Pr. U. S. 



Nat. Mus. ix. p. 167 '' ; Diiges, La Nat. i. p. 138". 

 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. S. 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 {nee 'Nutt.), Cah. J. f. Orn. 1869, p. 210"; Sharpe, Cat. Birds Brit. Mus. i. 



p. 189". 

 Buteo borealis, var. montanus, Lawr. Ann. Lye. N. Y. ix. pp. 133", 207^*; Frantz. J. f, Orn. 



1869, p. 368 "=; Sumichr. La Nat. v. p. 236 '\ 

 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, iii. 



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. Nac. Costa Rica, i. p. 126 ". 

 Buteo cooperi (nee Baird), Herrera, La Nat. (2) i. pp. 176, 320". 



Supra saturate fuscus, plumis nuchas ad basin albis ; teotricibus supracaudalibus mediis dorso coneoloribus, 



lateralibus rufis ; loris albis : subtus albus, gula fusco striata, pectoris lateribus et hypocbondriis maculis 



guttiformibus notatis : tibiis pallide rufis vix transfasciatis ; alls subtus griseo-albidis, vix fusco irroratis ; 



remigibus ad apicem nigricantibus ; cauda castanea, fascia subterminali nigra ; pedibus flavis. Long. 



tota circa 19'0, alas 14-5, oaudse 8-0, tarsi 3'3. (Descr. exempl. ex Guatemala. Mus. Brit.) 

 Forma altera. Subtus rufescens, gutture et abdomine medio fusois, tibiis fusco faseiatis (B. calurus). 

 Forma tertia. Pallidior, supra albo variegata: cauda paUidiore castanea, fascia subterminali nigra, ssepius 



absente : subtus fere omnino alba, tibiis vix cervino tinctis, abdomine medio striis rhachidaUbus vix ullis 



(B. krideri). 

 Juv. Subtus albus, gula (leviter), pectoris lateribus et abdomine medio fusco striatis ; cauda rufescenti-fusca, 



frequenter fusco transfasciata. 



