EXPLANATION OF PLATES. 



22. Hypotriorchis femoralis, 



23. Accipiter fuscus, 



24. do. 



25. Buteo lineatus, 



26. Archibuteo ferruginous, 



27. Buteo insignatus, 



28. Archibuteo sancti-johannis, 



29. Archibuteo lagopus, 



30. Buteo swainsoni, 



