374 APPENDIX IV. 



1901. TIopKixs, A. D. Insect Enemies of the Spruce in the 

 Xortheast. United States Department of Agriculture, 

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

 pages 25-26. 



Disonssion 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 Thorxe. 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, witli luimcroiis references to feedin*,' habits. 



1901. Newkirk, Garrett. For Our Encouragement. Bird 

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



Increase of l)irds in Missouri because of bird protection. 



1901. 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. TjesUe's Weel-hj, vol. xciii., pages 254-258, 

 September 21, 1901. 



A weneral discussion. 



1901. Palmer, T. S., and Olds, H. W. Digest of Game Laws 

 for 1901. United States Department of Agriculture, 

 Division Biological Survey, Bulletin Xo. 16, pages 1-152. 



A g^eneral discussion of the subject. 

 24 



