THE NATURAL HISTORY SURVEY. 97 



Sparvius platyptcrus VIEILLOT, Encyl. Method., Orn., Ill, 1823, 127. 

 Buteo platypterus FAXON, Auk. XVIII, April, 1901, 218. 



This Hawk is a not uncommon summer resident, and during 

 some seasons it is quite common during its migrations. Mr. B. 

 T. Gault reports taking a set of fresh eggs of this species on 

 April 15, 1889, at Jefferson, in Cook County. These birds arrive 

 early in March and depart late in October. 



The range of the Broad-winged Hawk extends through east- 

 ern North America, from Hudson Bay southward to the latitude 

 of the upper Amazon River in South America. It breeds through- 

 out its range within the United States. 



Genus ARCHIBUTEO Brehm, 1828. 



Archibuteo lagopus sancti-jonannis (Gmelin). American Rough- 

 legged Hawk. 



Falco sancti-johannis GMELIN, S. N., I, ii, 1788, 273. 

 Buteo sancti-johannis NTJTTALL, Man., I, 1832, 98. 

 Archibuteo lagopus var. sancti-johannis COUES, Key, 1872, 218. 

 Popular synonym : BLACK HAWK. 



A not uncommon winter resident. Mr. B. T. Gault has at 

 times found them plentiful during October and November. In 

 Du Page County he has also observed them late in February. Mr. 

 E. W. Nelson says* that this hawk "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 Feb- 

 ruary and the first of March they depart for the north." Mr. 

 J. G. Parker has observed them between January first and April 

 seventh. 



The range of this species includes the whole of North America 

 north of Mexico, breeding in Arctic and subarctic regions, ex- 

 cepting in Alaska. 



Genus AQUILA Brisson, 1760. 



Aquila chrysaetos (Sprungli). Golden Eagle. 



Falco chrysaetos LINNAEUS, S. N., ed. 10, I, 1758, 88. 



Aquila chrysaetos SPRUNGLI, in Andrae's Briefe aus der Schweiz, 



1776, 196. 



Aquila chrysaetos DUMONT, Diet. Sci. Nat., I, 1816, 339. 

 Aquila fulva NUTTALL, Man., I, 1832, 62. 

 Aquila chri/sactos var. canadensis RIDGWAY, 1873. 

 Popular synonyms: BLACK EAGLE. RLNG-TAILED EAGLE. 



*Birds of Northeastern Illinois, Bull, of the Essex Institute, Vol. VIII, 1876, 119. 



