FALCONID^. — XLV. 113 



8. ACCIPITER, Brisson. Hawks. 



= Nisus^ Cuvier. 



1. A. fuscus, xfjcvci.) Bon. Sharp -Shinned Hawk. 

 " Pigeon Haav^v." Bare portion of tarsus in front, 

 longer than middle toe; tarsus " booted " in ,5; general 

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



2. A. cooperi, Bon. Chicken Hawk. Bare tarsus 

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



9. ASTURINA, Vieillot. Gray Hawks. 



1. A. nitida, (Lath.) var. plagiaia, (Schl.) Cones. Gray 

 Hawk. L. 18; W. 10; T. 7^. Mexican, straying to S. 

 Ills. 



10. BUTEO, Cuvier. Buzzards. 

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



1. B. borea/is, {Gin.)yie'\\l. 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. lineaius, (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. {Graxirex, 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. 8^. 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 



