APPENDIX IV. 379 



1907. BEAL, F. E. L. Birds of California in Relation to the 

 Fruit Industry, Part I. United States Department of 

 Agriculture, Biological Survey, Bulletin 30, pages 1-100. 



An extended discussion with especial reference to newly-settled 

 regions. 



1907. HENSHAW, H. W. Does it Pay the Farmer to Protect 

 Birds. United States Department of Agriculture, Year- 

 book, 1907, pages 165-178. 



A general discussion of the values of insectivorous birds. 



1908. McATEE, W. L. Food Habits of the Grosbeaks. United 

 States Department of Agriculture, Biological Survey, Bul- 

 letin 32, pages 1-92. 



Detailed account of the food habits of five species. 



1908. FISHER, A. K. The Economic Value of Predaceous Birds 

 and Manuals. United States Department of Agriculture, 

 Yearbook, 1908, pages 187-194. 



Notes on usefulness of hawks, owls and other predaceous birds. 



1908. BEAL, F. E. L. The Relations Between Birds and Insects. 

 United States Department of Agriculture, Yearbook, 1908, 

 pages 343-350. 



Chief function of insectivorous birds is to check general in- 

 crease of insect life. 



1909. McATEE, W. L. Plants Useful to Attract Birds and Pro- 

 tect Fruit. United States Department of Agriculture, 

 Yearbook, 1909, pages 185-196. 



A general discussion of much value. 



1910. BEAL, F. E. L. Birds of California in Relation to the 

 Fruit Industry, Part II. United States Department of 

 Agriculture, Biological Survey, Bulletin 34, pages 1-96. 



A continuation and completion of tha discussion in Bulletin 30. 



