141 



ACCIPITER. Brisson. 



166. A. FUSCUS. Bon. Sha^p-Shinned Hawk. General color dark brown ; 

 L. 12; W. 7; T. 6. An abundant hawk during the spring and fall movements of 

 these birds. [Nelson.) 



167. A. COOPERI. Bon. Cooper's Hawk, Chicken Hawk. Larger than the 

 preceding; L. 18; W. 10; T. 8. Common summer resident, April to October. 

 //, Tarsus scutellate in front and behind. 



d. Face with a slight ruff; upper tail coverts white: 



CIRCUZ. Locepede. Marsh Harriei-s. 



168. C. CYANEUS. Var. Hudsonius. (L.) Coues. Pale bluish or brown ; 

 rump and under parts whitish ; L. 18; W. 15; T. 9. Common on the marshes 

 and prairies north during the migrations. Rare about Cincinnati. {Langdon.) 



dd. No ruff; 3 or 4 outer primaries emarginate ; rump not white : 



B UTEO. Cuvier. Buzzards. 



169. BUTEO BOREALIS. V. Hen Hatvk, Red- Tailed Buzzards. Four outer 

 primaries emarginate on inner web ; dark brown ; much barred and streaked ; tail 

 bright chestnut red above. L. 23; W, 15"/^ ; T. 8^. The most common resident 

 of the larger hawks north ; not as common in Central Indiana as the next. 



170. BUTEO LINEATUS. Jard. Red-shouldered Buzzard. Dark reddish- 

 brown, variegated; bend of wing orange brown ; L. 22; W. 14; T. 9. Smaller than 

 the red tailed, although nearly as long ; primaries emarginate as in above. Com- 

 mon during the migrations. Most of the hawks described, and others to follow, 

 have their main autumnal movements in late September and early October. I 

 have, in company with my friend E. W. Nelson, U. S. A., whose notes are so often 

 referred to here, watched them passing around the bend of the lake, south of Chi 

 cago, and as Mr. Nelson says: "A statement of the numbers which pass in a single 

 day, to one who has not observed them, would be received with incredulity. 

 Choosing a day when there is a strong south or south-west wind, the hawks com- 

 mence moving early in the morning, and continue flying the entire day, and so 

 numerously that taking a stand at a good point one would have from one to fifty 

 hawks in view, with but few intermissions throughout the day. Among these 

 occur all the migrants, but by far the greater number consist of the smaller species." 



171. BUTEO SWAINSONI. Bon. Gray, variously streaked ; dark area on 

 throat and breast ; three outer primaries emarginate ; tail with narrow, dark bars ; 

 variable; L. 20; W. 16. Of rare occurrence north; breeds in southern Illinois. 

 {Nelson.) 



172. BUTEO PENNSYLVANICUS. Bon. Broad-winged Hawk. Brown above, 

 whitish or fulvous below, variously streaked and barred; dark cheek patches; tail 

 with broad dark bands and narrow pale ones, white tipped; L. 18; W. 11 ; T. 7. 

 A stout, handsome hawk, though small; summer resident; breeds. {Nelson.) 

 IV. Tarsus reticulate all round. 



e. Upper mandible toothed ; under notched ; nostrils circular. 



