119 



Formerly a common winter resident; now very rare. Dr. A. L. 

 Marcy, of Evanston, found tliem quite plentiful during the winter of 

 1870-71, and obtained specimens. The only time I ever saw the bird 

 alive, was the 3rd of May, 187G, at Waukegan, when a fine adult speci- 

 men passed slowl}' overhead and disappeared toward the north. 



Genus Buteo Cuv. 



182. B pennsylvanicus (n';7s.). Broad-winged Hawk. Not 

 uncounnou the first of May and during September. A few breed. 



183. B. swainsoni Bunap. Swaixsox's Hawk. Of rather rare 

 occurrence in tliis vicinity. Have only noted it during the migrations. 

 I obtained an immature specimen May 30, 1875, at Hiverdale, 111., and 

 have since seen others. As this species breeds in Southern Illinois it 

 probably also breeds in the northern portions of the State. 



184. B. lineatus Gmel. Kkd-siiouldkkkd Hawk. Common dur- 

 ing the migrations. Mr. II. Ktmnicott speaks of an immense liiglit of 

 this species, consisting of thousands, whicli passed over Chicago, "in 

 October, 1854." The main fall migration of hawks in this vicinity 

 takes place the last of September or first of October, and a statement 

 of the numbers which pass In a single day, to one who has not ob- 

 served them, would be received with incredulity. Choosing a day 

 when there is a strong south or south-west wind, the hawks commence 

 moving south 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, witli but very few intermissions, 

 throughout the day. Among these occur all the migrants, but by far 

 the greater number consist of the smaller species. 



185. B. borealis var. borealis {Gmel.). Red-tailkd Hawk. 

 The most common resident among the larger Eaptores, and very im- 

 mcrous during the migrations. 



185o. Var. calurus Cass. Black Ked-tail. In my collection is 

 a fine adult specimen of this variety obtained near Chicago in April, 

 1873, by my friend Mr. C. 11. Smilli. 



Genus Arehibuteo Brchm. 



188. A. lagopus var. sancti-johannis (renn.). Arrives in 

 large numbers the first of October, and after remaining for a few 

 weeks the majority pass further south for the winter. The last of 

 February and first of March tliey ilei)art Jor the north. Exceedingly 

 shy except while migrating, and in consequence but few are shot. 

 Mr. C. II. Smith captured alive a line specimen in the black plumage, 

 in the spiing of 1874, and kei)t it until the early part of summer, when 

 the hot weather caused its death. 



For noble presence and piercing eye this bird has lew equals among 



