374 APPENDIX IV. 



1901. HOPKINS, A. 1). Insect Enemies of the Spruce in the 

 Northeast. United States Department of Agriculture, 

 Division of Entomology, Bulletin No. 28, new series, 

 pages 25-2G. 



Discussion of bird enemies of spruce-destroying beetle. 



1901. JUDD, SYLVESTER D. The Relation of Sparrows to Agri- 

 culture. United States Division of Biological Survey. 

 Bulletin No. 15, pages 1-98. 



An elaborate report on the economic relations of the North 

 American sparrows. Many illustrations. 



1901. MILLER, OLIVE THORNE. The Second Book of Birds: 

 Bird Families. Boston : Houghton, Mifflin & Co. Pages 

 i.-x., 1-210. 



An illustrated account of the families of North American 

 birds, with numerous references to feeding habits. 



1901. NEWKIRK, GARRETT. For Our Encouragement. Bird 

 Lore, vol. iii., pages 183. 184. 



Increase of birds in Missouri because of bird protection. 



1301. PALMER, T. S. Some Fundamental Principles of Bird 

 Protection. Bird Lore, vol. iii., pages 79-81. 



An admirable discussion of principles on which laws are 

 based. 



1901. PALMER, T. S. The Protection of Game a National 

 Question. Leslies Weekly, vol. xciii., pages 254-258, 

 September 21, 1901. 



A general discussion. 



1901. PALMER, T. S., and OLDS, H. W. Digest of Game Laws 

 for 1901. United States Department of Agriculture, 

 Division Biological Survey, Bulletin No. 16, pages 1-152. 



A general discussion of the subject. 

 21 



