ORDER RAPTORES. 149 
Genus NYCTEA STEPHENS. 
Nyctea STEPH. Gen. Zool. XIII. ii. 1826, 63. Type, Strix nyctea 
Linn. 
376. Nyctea nyctea (Linvy.). 
Snowy Owl. 
Strix nyctea LINN. S. N. ed. 10, I. 1758, 93. 
Nyctea nyctea Licut. Nomen. Mus. Berol. 1854, 7. 
Gn, 20k MR 406, iC lao.) 
Geoc. Dist. — Northern portions of the northern hemisphere. 
In North America breeding wholly north of the United States; in 
winter migrating south to the Middle States, straggling to South 
Carolina, Texas, California, and Bermuda. 
Genus SURNIA Dumerit. 
Surnia Dummre. Zool. Anal. 1806, 34. Type, Strix ululda LINN. 
[377.] Surnia ulula (Liny.). 
Hawk Owl. 
Strix ulula Linn. S. N.ed. 10, I. 1758, 93. 
Surnia ulula BonaP. Cat. Met. Ucc. Eur. 1842, 22. 
[B—, C—, R 4074, C 481.] 
Geroc. Dist.— Arctic portions of the Old World. Casual in 
Alaska (St. Michaels). 
377 a. Surnia ulula caparoch (MU .t.). 
American Hawk Owl. 
Strix caparoch MULL. S. N. Suppl. 1776, 69. 
Surnia ulula caparoch StEyN. Auk, I. Oct. 1834, 363. 
[B 62, C 326, R 407, C 480.] 
Geroc. Dist.— Arctic America, breeding from Newfoundland north- 
ward, and migrating in winter to the northern border of the United 
States. Occasional in England. 
