FALCONID^. XLV. 113 



8. ACCIPITER, Brisson. HAWKS. 

 = Nisus, Cuvier. 



1. A. fuscus, v Gm.) Bon. SHARP - SHINNED HAWK. 

 " PIGEON HAWK." Bare portion of tarsus in front, 

 longer than middle toe; tarsus "booted" in $ general 

 color dark brown; L. 12; W. 7; T. 6. U. S., abundant. 



2. A. cooper/', Bon. CHICKEN HAWK. Bare tarsus 

 shorter than middle toe; L. 18; W. 10; T. 8. N. Am. 



9. ASTURINA, Vieillot. GRAY HAWKS. 



1. A. niiida, (Lath.) var. plagiata, (Schl.) Coues. GRAY 

 HAWK. L. 18; W. 10; T. 7-J-. Mexican, straying to S. 

 Ills. 



10. BUTEO, Cuvier. BUZZARDS. 

 * 4 outer primaries emarginate on inner web. (Buteo.) 



1. B. borealis, (Gm.) Vieill. HEN HAWK. RED-TAILED 

 BUZZARD. Dark brown; much barred and streaked; tail 

 bright chestnut red above; L. 23; W. 15|; T. 8. U. S., 

 common. 



2. B. lineatus, (Gm.) Jard. RED - SHOULDERED BUZ- 

 ZARD. Dark reddish brown, variegated; bend of wing 

 orange brown; L. 22; W. 14; T. 9. Smaller than the 

 preceding, although nearly as long. E. N. Am., abundant. 

 ** 3 outer primaries emarginate on inner web. (Craxirex, Gould.) 



3. B. swainsoni, Bon. SWAINSON'S BUZZARD. Gray, 

 variously streaked, usually a dark area on throat and 

 breast; tail with six or more narrow dark bars; variable; 

 L. 20; W. 16; T. 8f Western; E. to Ind. and Mass. 



4. B. pennsylvanicus, (Wils.) Bon. BROAD -WINGED 

 HAWK. Brown above, whitish or fulvous below, variously 

 streaked and barred; conspicuous dark cheek patches; 

 tail with broad dark bands alternating with narrower 



