EXPLANATION TO PLATE VL 



Fig. 1. Accipiter atricapillus, Wilson. American Goshawk. 



Fig. 2. Accipiter atricapillus sti-iatulus, Ridgway. Western Goshawk. 



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



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



Figs. 7, 8. Biiteo borealis calurus, Cassin. Western red-tailed Hawk. 



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



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