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315 
(373a) 
(376) 
(3770) 
LIST OF THE BIRDS OF EASTERN NORTH AMERICA. 359 
Genus SCOTIAPTEX. Swarns. 
SCOTIAPTEX CINEREA. (GMeEL.) Great Gray Owl. 
Arctic species, which occurs in winter as far south as New England and 
Illinois; numerous records for Massachusetts, New York, Ohio, etc. 
Genus NYCTALA. Brenm. 
NYCTALA TENGMALMI RICHARDSONI. (BonaAp.) Richardson’s Owl. 
Arctic species ; casual in winter in northern United States; New Eng- 
land, Illinois, ete. ; breeds north of United States. 
NYCTALA ACADICA. (GMEL.) Saw-whet Owl. Acadian Owl. 
North America; breeds from middle United States northward. 
MEGASCOPS ASIO. (LINN.) Screech Owl. 
Eastern North America; Canada to Georgia; breeds nearly throughout 
its range. 
Megascops asio floridanus. (Ripaw.) Florida Sereech Owl. 
A rather small southern race of the Sereech Owl, somewhat darker and 
the markings heavier; occurs in Gulf States from South Carolina 
to Louisiana. 
Genus BUBO, Dumeri. 
BUBO VIRGINIANUS. (GmeL.) Great Horned Owl. 
Eastern North America; north to Labrador ; breeds throughout its range. 
Bubo virginianus arcticus. Swatns. Arctic Horned Owl. 
Pale birds have occasionally been taken in northeastern North America 
which may be referable to this race. 
Bubo virginianus saturatus.  RrpGcw. Dusky Horned Owl. 
A dark race; ranging from Labrador and Hudson Bay westward to 
Alaska; south to Louisiana and Arizona; some Louisiana speci- 
mens are very dark. 
Genus NYCTEA. STEPH. 
NYCTEA NYCTEA. (LinNn.) Snowy Owl. 
Northern North America; in winter, south to Middle States; breeds 
north of United States. 
Genus SYRNIA. Dumerit. 
SURNIA ULULA CAPAROCH. (MiLy.) American Hawk Owl. 
Arctic North America; south in winter to borders of United States ; 
New England and Illinois; breeds from New England northward. 
Genus SPEOTYTO. GLocer. 
SPEOTYTO CUNICULARIA HYPOG4EA. (Bonar.) Burrowing Owl. 
Western species ; one record from Massachusetts. 
Speotyto cunicularia floridana. Ripaw. Florida Burrowing Owl. 
Resident in southern Florida ; a rather dark form, having the feet and legs 
(tarsus) almost without feathers; breeds in a hole in the ground. 
