188 Catalogue of the Birds of Illinois. 



Genus Nyctea, Stephens. 



179. iV. scanrfiacrt (Linn.) Newton. Snowy Owl. Winter visitant ; of irreg- 

 ular occurrence, but sometimes common. 



Genus Surnia, Dumeril. 



180. S. fimerea (Linn.) Sw- & Rich. American Hawk Owl. Winter vis- 

 itant to extreme northern counties (Kane county, Sept. 1869; Nelson, p. 117). 



Order ACCIPITRES. 



Family FALCONID^.— Hawks, Falcons, Kites and Eagles. 



Genus Hierofalco, Cuvier. 



181. H. mexicanus polyagrus [Q,diS,s,.)'R\Agw. Prairie Falcon. A straggler 

 from the west. 



Genus Falco, Linnaeus. * 



*182. F. peregrinns ncevius (Gm.) Ridgw. Duck Hawk. Resident, locally. 



Genus J^salon, Kaup. 



*183. ^. coliimbarius (Linn.) Kaup. Pigeon Hawk. Resident, locally; 

 more common in spring and fall. 



Genus Tinnunculus, Vieillot. 



*184. T. sjMrverius (Linn.) Vieill. American Kestril. Resident; probably 

 the most abundant species of the family, generally known as the "Sparrow 

 Hawk." 



*184a. T. sparverius isahellinus (Sw.) Ridgw. Isabelline Kestril. An 

 adult female in my collection is a very extreme example of this southern race. 

 It was obtained at Mt. Carmel, October 5, 1874. The entire pileum is dark 

 plumbeous, without the least trace of rufous on the crown, while the durky bars 

 on the upper surface are everywhere much wider than the rufous intersperses. 

 I have also a very typical male, the color very dark, with uniform deep plumbe- 

 ous pileum and unspotted deep vinaceous breast. 



Genus Pandion, Savigny. 



*185. P. haliaetus carolinensis (Gm.) Ridgw. American Osprey. Resi- 

 dent southward, at least in mild winters; transient northward (according to 

 Nelson, p. 118). 



Genus Elakoides, Gray. 



*186. E. forficatus (Linn.) Ridgw. Swallow-tailed Kite. Summer 

 sojourner; rare northward, but extremely abundant, at times, in the southern 

 counties. Most numerous in August, on the prairies or near water- courses. 



Genus Elanus, Savigny. 



*187. E. glaucus (Bartr.) Coues. White-tailed Kite. Very rare summer 

 sojourner in extreme southern portion. 



