Birds of the United States. 
11 
suBREjrus VII. ELAXus, Sav. 
16. pALro MELATsroPTERUs, Daucl. / Falco ir.elanopterus. Nob. 2. pi. 11. 
fig-. 1, icmale. 
17. Falcv.- furcatus, L. 
Falco ftircatus, Wils. 6. p. 70, pl- 
51, fig-. 2, male. 
18. *Falco lag-opus, L. 
19. Falco sancti-johannis, Gm. 
SUBGEKUS VIII. *BUTEO, Bcchst. 
Falco lagopus, Wils. 4. p. 59, pi. 33, 
%. 1. 
20. Falco borealis, Gm. 
Falco niger, Wils. 6. p. 82, pi. 53, 
fig-. 1, adult — p. 84, pi. 53, tig-. 2, 
young". 
Falco borealis, Wils. 6. p. 75, pi. 
52, %. 1, adult. 
Falco leverianus, Wils. 6. p. 78, pi. 
52, fig-. 1, young-. 
21. Falco hy emails, Gm 
22. *Falco cvaneus. L. 
SUBGENUS IX. *CIRCUS, Bcchst. 
r Falco hyemalis, Wils. 4. p. 73, pi. 
J 35, fig-, 1, adult male. 
") Falco lineatus, Wils. 6. p. 86, pi. 53, 
(. fig-. 3, young- male. 
C Falco idiginosus, Wils. 6. p. 67, pi. 
J 51, fig. 1, young female. 
^ Falco cyaneus. Nob. 2. pi. 12, fig. 1, 
C adult male. 
GENUS 3. *STRTX, L. 
23. *Strix funerea, Gm. 
24. *Strix nyctea, L. 
25. Strix cunicularia, Molina. 
26. Strix asio, L. 
SUBGENUS I. *suRNiA, Dumcril. 
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, pi. 
7, fig. 2. 
r strix naevia, Wils. 3. p. 16, pi. fig. 
) adult. 
j strix asio, Wils. 5. p. 83, pi. fig. 
C young. 
SUBGENUS II. *ULUIA, 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 brachyotos, Gm, Strix brachyotos, Wils. 4. p. 64, pi, 
33, fijT. 3, male. 
