490 Field Museum of Natural History — Zoology, Vol. IX. 



deserted crow's or hawk's nest is used. The eggs are white, two to 

 four in number, and measure about 2 x 1.75 inches. Breeds in March 

 and April and farther south somewhat earher. There is a set of 3 

 eggs in the Field Museum collection taken in Clark Co., Missouri, 

 March i, 1896. 



The "hoot" of the Barred Owl may be described as hoo-hoo. 

 h-hoo-hoo, ho-hoo-0-0. The notes are as a rule several tones higher 

 than those of the Great Horned Owl and the hoot is longer. It also 

 utters a wild scream. 



Genus SCOTIAPTEX Swauison. 



177. Scotiaptex nebulosa (Forster). 

 Great Gray Owl. 



Scotiaptex cinerea (Gmel.), A. O. U. Check List, 1895, p. 144. 

 Distr. : Arctic species which occurs in winter as far south as New 

 England and Illinois. 



Great Gray Owl. 



