Birds of the United States. 



11 



SUBGENUS VII. EEANUS, SaV. 



16. Falco melanoptehus, Daud. Falco melanopterus, Nob. 2. pi. 11, 



fig 1 . 1, female. 



17. Falco furcatus, L. Falco furcatus, Wils. 6. p< 70, pi. 



51, fig 1 . 2, male. 



18. *Falco lagopus, L. 



19. Falco sancti-johannis, Gm 



SUBGENUS Till. *BUTEO, BecllSt. 



Falco lag-opus, Wils. 4. p. 59, pi. 33, 

 fig-. 1. 



■20. Falco borealis, Gm. 



Falco niger, Wils. 6. p. 82, pi. 53, 

 fig. 1, adult— p. 84, pi. 53, fig. 2, 

 young-. 



Falco borealis, Wils. 6. p. 75, pi. 



52, fig. 1, adult. 

 Falco leverianus, Wils. 6. p. 78, pi. 



52,. fig-. 1, young-. 



21. Falco by emails, Gm. 



22. *Falco cyaneus, L. 



subgenus ix. *circus, Bechst. 



C Falco byemalis, Wils. 4. p. 73, pi. 

 35, fig. 1, adult male. 

 Falco lineatus, Wils. 6. p. 86, pi. 53, 

 fig. 3, young male. 



Falco ulig-inosus, Wils. 6. p. 67, pi. 



51, fig". 1, young female. 

 Falco cyaneus, Nob. 2. pi. 12, fig. 1, 



adult male. 



GENUS 3. *STRIX, L. 



23. *Strix funerea, Gm. 



24. * Strix nyctea, L. 



25. Strix cunicularia, Molina 



26. Strix asio, L. 



subgenus i. *suhnia, Dumeril. 



Strix hudsonia, Wils. 6. p. 64, pi. 

 50, fig-. 6. 



Strix nyctea, Wils. 4. p. 53, pi. 31, 

 fig-. 1, male. 



Strix cunicularia, Nob. 1. p. 68, pk 



7, fig-. 2. 

 Strix naevia, Wils. 3. p. 16, pi. fig. 



adult. 

 Strix asio, Wils. 5. p. 83, pi. fig-. 



young. 



subgenus ii. *ulula, Cuv. (Nob.) 



27. Strix virginiana, Gm. Strix virginiana, Wils. 6. p. 52, pi. 



50, fig. 1. 



28. *Strix otus, L. Strix otus, Wils. 6. p. 73, pi. 51, 



fig. 3. 



29. *Strix bracliyotos, Gm. Strix brachyotos, Wils. 4. p. 64, pi. 



33, fig. 3, male. 



