EXPLANATION TO PLATE VI. 



Pig. 1. Accipiteratricapillus, Wilson. American Goshawk. 



Fig. 2. Accipiter atrioapillus striatulus, Ridgway. Western Goshawk. 



Pigs. 3, 4. Parabuteo unicinctus harrisi, Audubon. Harris's Hawk. 



Pigs. 5, 6. Buteo borealis, Gmelin. Red-tailed Hawk. 



Pigs. 7, 8. Buteo borealis calurus, Cassin. Western red-tailed Hawk. 



Pig. 9. Buteo lineatus elegans, Cassin. Red-bellied Hawk. 



