338 APPENDIX IV. 



1878. Lylp:, David Alexander. Thu Robins" Food. Aincrican 

 Xatumlisi, vol. xii., pages 448-453. 

 Habits, (juality, (juantity. 



1878. WiLLiSTON, S. W. The Prairie Dog. Owl, and Eattle- 

 snake. Anierican Naturalist, vol. xii., page 207. 



The shore4ark part of food of the owl. 



1879. Fisher, A. K. Small Birds Caught by the Burdock. 

 American Naturalist, vol. x., page 239. 



Humming-bird, yellow-bird, and yellow-iiiinped warbler eauirht 

 by burs of burdock. 



1880. Brewer, T. M. The Value of Birds. Transactions Illi- 

 nois State Horticultural Society, 1879, vol. xiii., pages 

 173-178. 



Reprint of an address delivered before the Hingham (Mass.) 

 Agricultural and Horticultural Society, July 19, 1869, on the 

 economic importance of birds. 



1880. CuMMiNGS, A. L. Horticultural Ornithology. Trans- 

 actions Illinois State Horticultural Society. 1879, vol. 

 xiii., pages 295-298. 



Discussion of the economic relations of certain of our native 

 birds. 



1880. Forbes, S. A. The Food of Birds. Transactions Illi- 

 nois State Horticultural Society, 1879, vol. xiii., ])ages 

 120-172. 



Discussion of the economic value of birds, followed by de- 

 tailed account of the feeding habits of the robin, catbird, 

 blown thrush, wood-thrush, Alice's thrusli, and Swainson's 

 thrush: followed by a detailed account of the stomach contents 

 of these birds. 



1880. FoRBKS. S. A. The Food of Birds. Bulletin Illinois 

 State Laboratory Natural History, vol. i., pages 80-1 18. 



A general introduction discussing the necessity of a knowl- 

 edge of bird food and methods of study, with extended records 

 of studies of food of the thrushes and stone-chats. 



