56 FALCONID^. 



A. Five outer primaries emarginate ; tail more than two-thirds the wing ; hill high at the ba.sc; 



nostrils oval, with eccentric tubercle *. [Parabuteo.) 



B. Four outer primaries emarginate. 



Tail about one-third the wing. (Tachytriorchis.) 

 Tail about half the wing. (Buteo.) 



C. Three outer primaries emarginate. {Buteo partim, Buteola.) 



The wings in Buteo are long and pointed, the third and fourth quills the longest. 

 The bare tarsi are scutellate in front and behind, reticulate on the sides ; the toes 

 relatively much longer than in Archibuteo and with long strong claws. The bill has 

 no notch and the tomia is but slightly festooned ; the nostrils are irregularly oval and 

 (except, perhaps, in JButeo harrisi) without central tubercle. 



Section A. Majores. Alee remigihus externis quinque in pogonio interno excisis. 

 1. Buteo harrisi. 



Falco harrisii, Audub. Birds Amer. t. 392' ; Orn. Biogr. v. p. 30 ^ 



Craairex harrisii, Coues, Proc. Acad. Phil. 1866, p. 49 \ 



Anterior harrisii, Gurney, Ibis, 1875, p. 234''. 



Hypomorphnus uidcinctus (nee Temm.), Cab. & Tschudi, Faun. Peruan. pp. 17, 85 '. 



Polyborus tmniurus, Tschudi, Arch. £. Naturg. 1844, p. 263 '. 



Urubitinga unicincta (nee Temm.), Scl. & Salv. Ibis, 1859, p. 216'; Dugfes, La Nat. i. p. 138 \ 



Spizageranus unicinctus (nee Temm.), Scl. P. Z. S. 1860, p. 288 '. 



Craxirex unicinctus (nee Temm.), Salvin, P. Z. S. 1867, p. 158'°. 



Morphnus unicinctus, Finsch, Abh. nat. Ver. Bremen, 1873, p. 363 ". 



Erythrocnema unicincta, pt. (nee Temm.), Sharpe, Cat. Birds Brit. Mus. i. p. 85"; Sumichr. La 



Nat. V. p. 235 ". 

 Antenor unicinctus (nee Temm.), Berl. Ibis, 1884, p. 436 ". 



Parabuteo unicinctus, var. harrisi, Ridgw. in Baird, Brew., &, Ridgw. N. Amer. Birds, iii. p. 250". 

 Craxirex unicinctus. Tar. harrisi, Lawr. Mem. Best. Soc. N. H. ii. p. 302 '°. 

 Antenor unicinctus, var. harrisi, Lawr. Bull. U. S. Nat. Mus. no. 4, p. 42''. 

 Buteo unicinctus harrisi, Senuett, Bull. U. S. Geol. Surv. v. p. 419 '^ 

 Parabuteo unicinctus harrisi. Nutting, Proc. U. S. Nat. Mus. v. p. 404"; Balding, op. cit. vi. 



p. 343"; Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 126"; Bendire, Life Hist. N. Am. 



Birds, i. p. 20, t. 6. tigs. 3, 4 "; Cherrie, Auk, ix. p. 328 " ; Fisher, Bull. U. S. Dep. Agr, 



no. 3, p. 47''; A. 0. U. Check-list N. Amer. Birds, p. 129"'. 



Supra fuinoso-bninneus, dorso postico sordide ferrugineo, nigro maculate ; supracaudalibus et caudae parte 

 basali albis ; rectiicibus nigricantibus, late albo terminatis ; alls nigricanti-brunneis, tectricibus alarum 

 minimis castaneis, mcdianis bmnneis, castaneo marginatis : subtus omiiino bninncus, concolor ; tibiis 

 laete castaneis ; crisso et subcaudalibus pure albis ; subalaribus castaneis, nigro medialiter notatis : rostro 

 plumbeo, ad apicem nigro ; cera et pedibus flavis ; iride brunnea. Long, tota circa 22-5, alse 14-u 

 caudae 9-4.5, tarsi 3'7. (Descr. feminae ex Eio Grande citj', Texas. Mus. nostr.) 



* This latter character cannot always be detected in skins. 



