EXPLANATION TO PLATE VIII. 



Figs. 1, 2, 3, 4, 5, 6. Buteo swainsoni, Bonaparte. Swainson's Hawk 

 *! g 7 - Buteo brachyurus, Vicillot. Short-toiled Hawk 



Urubitinga anthracina, Lichtenstein. Mexican Black Hawk. 



11, 12. Archibuteo lagopus sancti-johannis, Gmelin. American Rough-legged Hawk. 

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