172 CHECK-LIST OF NORTH AMERICAN BIRDS. 
Mackenzie south to northern British Columbia, northern Alberta, and Magdalen 
Islands; south in winter to southern Canada but rare eastward; casual 
south to Oregon, Colorado, Nebraska, Illinois, Pennsylvania, and New England. 
Cryptoglaux acadica (GMELIN). 
RancE.— Temperate North America. 
a. Cryptoglaux acadica acadica (GMELIN). Saw-whet Owl. [3872.] 
Strix acadica GMELIN, Syst. Nat., I, i, 1788, 296. (Eastern North Amer- 
ica.) 
RancE.— North America. Breeds from central and eastern British Co- 
lumbia, Alberta, Manitoba, Quebec, New Brunswick, and Nova Scotia south to 
central Arizona, New Mexico, southern Nebraska, northern Indiana, Pennsyl- 
vania, and Maryland; winters south to southern California, Louisiana, Vir- 
ginia (casually to the Carolinas), and Maine; casual or accidental in Mexico 
and Guatemala. 
b. Cryptoglaux acadica scot#a (Oscoop). Northwestern Saw-whet Owl. 
[372a.] 
Nyctala acadica scotea Osaoop, N. Amer. Fauna, No. 21, 1901, 43. 
(Massett, Queen Charlotte Islands, B. C.) 
RanGE.— Queen Charlotte Islands and British Columbia, south to Puget 
Sound region. 
GENUS OTUS PENNANT. 
Otus PENNANT, Indian Zoology, 1769, 3. Type, by monotypy, Otus 
bakkamena PENNANT. 
Otus A4sio (LINN XUs). 
RanGcE.— Temperate North America, from southern British Colum- 
bia and the northern border of eastern United States south to north- 
ern Mexico. 
a. Otus asio asio (LINNm=US). Screech Owl. [373.] 
Strix asio Linnmus, Syst. Nat., ed. 10, I, 1758, 92. (Carolina or Vir- 
ginia.) 
Rance.— Eastern North America from Minnesota, Ontario, and New 
Brunswick south to northeastern Texas and Georgia, and west to about the 
100th meridian; accidental in England. 
