NOTE. 



The following papers, with the exception of 

 the first four, which are Mr. BoUes's latest work, 

 are arranged in the order in which they were 

 written and first published in different periodi- 

 cals between the years 1890 and 1894. 



They are now reprinted in their original form, 

 although this involves a certain amount of repe- 

 tition which would doubtless have been avoided 

 had Mr. BoUes himself revised them. 



Barred Owls in Captivity and the two papers 

 that follow appeared originally in " The Auk," 

 Bird Traits in " The New England Magazine," 

 the next two as well as the first four in " The 

 Atlantic Monthly," Ways of the Owl and the 

 two closing papers in " The Popular Science 

 Monthly." 



E. Q. B. 



