EXPLANATION TO PLATE XH. 



Fig. 1. Strix pratincola, Bonaparte. American Barn Owl. 



Fig. 2. Asio vvilsonianus. Lesson. Ajncrican Long-eared Owl. 



Fig. 3. Asio aceipitrinus, Pallas. Short-oared Owl. 



Pig. 4. Syrnium nebulosum. Forster. Barred Owl. 



Fig. 5. Scotiaptex oinerea, Gmelin. Great Gray Owl. 



Fig. 6. Nyctala tengmalmi richardsoni. Bonaparte. Richardon's Owl. 



Fig. 7. Nyctala acadica, Gmelin. Saw-whet Owl. 



Fig. 8. Megascops asio, Linna?us. Screech Owl. 



Fig. 9. Megascops asio maefarlanei. Brewster. MacParlane's Screech Owl. 



Fig. 10. Megascops asio maxwelliaj, Ridgway. Rocky Mountain Screech Owl 



Fig. U. Megascops asio trichopsis. Wagler. Mexican Screech Owl. 



Fig. 12. Bilbo virginianks, Gmelin. Great Horned Owl. 



Fig. 13. Micropallas whitneyi. Cooper. Elf Owl. 



Fig. 14. Speotyto cunioularia hypogasa, Bonaparte. Burrowing Owl. 



Pig. 15. Megascops flammeolus, Kaup. Plammulatod Screeph Owl. 



Pig. 1(). Speotyto cunicularia floridana. Ridgway. Florida Burrowing Owl. 



Fig. 17. Glaucidiura phahenoides. Daudain. Ferruginous Pigmy Owl. 



Pig. 18. Suruia ulula caparoch, Mtiller. American Hawk Owl. 



Fig. 19. Nyctea nyctea, Linnteus. Snowy Owl. 



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