188 Catalogue of the Birds of Illinois. 
Genus Nyctea, Stephens. 
179. N. scandiaca (Linn.) Newton. Snowy Owl. Winter visitant; of irreg- 
ular Qccurrence, but sometimes common. 
Genus Surnia, Dumeril. 
180. S. funerea (Linn.) Sw. & Rich. American Hawk Owl. Winter vis- 
itant to extreme northern counties (Kane county, Sept. 1869; Nelson, p. 117). 
Order ACCIPITRES. 
Family FALCCXNIDHC. — Hawks, Falcons, Kites and Eagles. 
Genus Hierofalco, Cuvier. 
181. H. mexicanus polyagrus (Cass.) Ridgw. Prairie Falcon. A straggler 
from the west. 
Genus Falco, Linnseus. 
*182. F. peregrinus ncevius (Gm.) Ridgw. Duck Hawk. Resident, locally. 
Genus iEsALON, Kaup. 
*183. JE. columbarius (Linn.) Kaup. Pigeon Hawk. Resident, locally; 
more common in spring and fall. 
Genus Tinnunculus, Vieillot. 
*184. T. sparverius (Linn.) Yieill. American Kestril. Resident; probably 
the most abundant species of the family, generally known as the “Sparrow 
Hawk.” 
*184«. T. sparverius isabellinus (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 Elanoides, 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. 
