FALCONID^E. CLIII. 259 



W. 11. T. 7. E. N. Am., a handsome but small hawk. (Lat. 

 broadest.) 



aa. Outer webs of primaries spotted with white, buffy or ochraceous : 4 pri- 

 maries emarginate. 



814. B. lineatus (Gmelin). CHICKEN HAWK. RED-SHOUL- 

 DERED BUZZARD. Dark reddish brown ; head and neck more or 

 less rusty ; bend of wing orange brown in adult ; tail with sev- 

 eral white bars ; young much streaked below and with little red- 

 dish. L. 22. W. 14. T. 9. Considerably lighter in weight than 

 the red-tailed hawk, although nearly as long. N. Am., abundant. 



422. ASTURINA Vieillot. (Lat., dim. of Astur, a hawk). 



815. A. plagiata Schlegel. GRAY HAWK. GOSHAWK. Chiefly 

 dark ashy gray, white below : wings and tail black, with white 

 markings; upper tail coverts white. L. 18. W. 10. T. 7. 

 Mexican, straying to S. 111. (Lat., striped.) 



423. ARCHIBUTEO Brehm. (Lat. archi, chief ; Buteo.) 

 a. Bill small and weak, its gape, from corner to corner, Ig inches. 



816. A. lagopua (Briinnich). ROUGH-LEGGED HAWK. BLACK 

 HAWK. Chiefly whitish, rusty streaked ; but sometimes entirely 

 black. L. 24. W. 18. T. 10. Northern regions. The Amer- 

 ican form, var. sancti-johannis (Gmelin) is darker and more rusty 

 than European. (Eu.) (AayoJs, hare ; TTOV'S, foot.) 



aa. Bill strong, the gape 1| inches wide from corner to corner of mouth. 



817. A. ferruginous (Lichtenstein). Rusty brown, marked 

 with gray, white, and black ; sometimes plain dark chocolate- 

 brown. L. 23. W. 17. T. 10. W. N. Am., E. to 111. 



424. AQUILA Brisson. (Lat., eagle.) 



818. A. chrysaetos (L.). GOLDEN EAGLE. Glossy dark 

 brown ; head and neck paler tawny brown ; quills blackish ; tail 

 clouded with whitish at base. L. 36. W. 25. T. 16. Northern 

 regions, less common than the Bald Eagle, in the U. S. (Eu.) 



or, gold; deros, eagle.) 



425. HALIJEETUS Savigny. (oXy, sea ; OCTOS, eagle.) 



819. H. leucocephalua (L.). BALD EAGLE. Dark brown; 

 head, neck, and tail white (after the third year) ; bill and feet 

 yeUow. L. 36. W. 25. T. 14. N. Am., everywhere. "Com- 

 mon, for an eagle; a piratical parasite of the Osprey, otherwise 

 notorious as the emblem of the Republic." (Cones.) (Xev*6s, 

 white ; /ce^oXij, head.) 



