358 APPENDIX IV. 



1897. Owen, Daniel E. Notes on a Captive Hermit Thrush. 

 The Auk, vol. xiv., pages 1-8. 



Account of feeding habits of hermit thrush; method of de- 

 termining rate of digestion. 



1897. Palmer, T. S. Extermination of Noxious Animals by- 

 Bounties. United States Department of Agriculture, 

 Yearbook, 1896, pages 55-68. 



History of bounty system in the United States and other coun- 

 tries. Bounties on birds almost invariably pernicious. 



1897. Proctor, Thomas. Disgorgement among Song Birds. 

 The Auk, vol. xiv., page 412. 



Wood thrushes and other true thrushes disgorge cherry pits; 

 disgorgement also noticed in red-eyed vireo, myrtle bird, and 

 European robin. 



1897. Eeed, J. Harris. Notes on the American Barn Owl in 

 Eastern Pennsylvania. The Auk, vol. xiv., pages 374- 

 383. 



Occurrence, nesting habits, feeding habits. 



1897. Silloway, P. M. Sketches of some Common Birds. Cin- 

 cinnati. The Editor Publishing Company. Pages 1-331. 



Many references to food habits. 



1897. Warren, B. H. The Army- Worm. Eeport Pennsylvania 

 State College, 1896, pages 164-220. 



Record of studies of food of many birds during an army-worm 

 outbreak, showing that nearly all fed freely on the pests. 



1898. Adams, Stephen J. Swallow Investigations. The Wil- 

 son Bulletin, vol. x., 0. S. No. 20, May 30, 1898, pages 

 42-43. 



They take enormous numbers of insects; nearly, if not quite, 

 all taken on the wing. Barn swallows take enormous numbers 

 of apple-maggot flies. 



