IO6 THE CHICAGO ACADEMY OF SCIENCES. 



Resident. Often strays into Chicago and becomes confused, 

 when they may be captured alive." 



The range of this species covers temperate North America 

 east of the Great Plains. 



Genus BUBO Dumeril, 1806. 



Bubo virginianus (Gmelin). Great Horned Owl. 

 Strix virginiana GMELIN, S. N., I, pt. i, 1788, 287. 

 Bubo virginianus BONAPARTE, Geog. & Comp. List, 1838, 6. 

 Popular synonyms : HOOT OWL. CAT OWL. BOOBY OWL. 



The Great Horned Owl was a common resident many years 

 ago, but it is now very rare. Even as early as 1876, Mr. Nelson 

 records it as formerly common but at that time a not common 

 resident. In 1890, Mr. Ned Pratt collected several sets of the 

 eggs of this Owl near Lake Forest, a short distance north of 

 Chicago. 



The range of this species extends from Labrador south 

 through eastern Mexico to Costa Rica and east of the Great 

 Plains. 



Bubo virginianus arcticus (Swains.). Arctic Horned Owl. 



Strix (Bubo) arctica SWAINS., in Sw. & Rich., Fauna Bor. Amer., II, 



1831, 86, pi. 30. 

 Bubo virginianus var. arcticus CASS., Illust. B. Cat., etc., 1854, 178. 



This variety of the Great Horned Owl is included in this list 

 on the strength of the following published record of Mr. E. W. 

 Nelson :* "A rare winter visitant. Have a fine specimen in my 

 collection, taken the last of December, 1874." 



This variety of virginianus winters as far south as Idaho, 

 Wyoming and South Dakota. 



Genus NYCTEA Stephens, 1826. 



Nyctea nyctea (Linnaeus). Snowy Owl. 



Strix nyctea LINNAEUS, S. N., ed. 10, I, 1758, 93. 



Surnia nyctea SELBY, 111. Br. Orn., I, 1833, 95, pi. 23. 



Nyctea nyctea LIGHT., Nomen. Mus. Berol., 1854, 7. 



Nyctea scandiaca NEWT., 4th ed. Yarrell's Hist. Brit. B., iii, 1872, 187. 



Nyctea scandiaca var. arctica RIDGWAY, B. B. & R., Hist. N. Amer. B., 



Ill, 1874, 61, 70. 

 Popular synonyms : GREAT WHITE OWL. SNOW OWL. ERMINE OWL. 



WHITE OWL. 



An irregular winter visitant. Mr. J. Grafton Parker, Jr., 

 informs me that on November 3, 1885, he observed two Snowy 



*Birds of Northeastern Illinois, Bull, of the Essex Institute, Vol. VIII, 1876, 117. 



