330 APPENDIX IV. 



1869. Turnbull, William P. The Birds of East Pennsylvania 

 and New Jersey. Philadelphia, Henry Grambo & Co., 

 pages i.-vii., 5-50. 



On pages 48-50 there is a discussion of " Birds which have 

 disappeared." 



1870. Le Baron, William. Do Birds do More Good than 

 Harm? No. I., Prairie Farmer, March 12, 1870, vol. xli., 

 page 74; No. II., Ibid., March 19, 1870, page 82; No. 

 III., Ibid., April 2, 1870. Summary in Seventeenth 

 Eeport of the State Entomologist of Illinois, Appendix, 

 pages 6-7. 



First article considers injuries done by birds in general. The 

 second considers certain common species. The third considers 

 birds as essential to keeping up the balance of nature. 



1870. Le Baron, William. Insectivorous Habits of the Prairie 

 Lark (Alauda alpestris) . American Entomologist, April, 

 1870, vol. ii., page 177. 



Feeds on cutworms as well as grain. 



1871. Glover, T. Eeport of the Entomologist. Eeport of the 

 United States Department of Agriculture, 1870, pages 

 90-91. 



Note on the economic value of birds in general, and on the 

 introduction of the English sparrow in particular, included in 

 the report on entomology. 



1872. Lockwood, Eev. Samuel. The Baltimore Oriole and 

 Carpenter Bee. American Naturalist, vol. ii., pages 721- 

 724. 



Oriole removes head of bee and empties honey-sack. 



1872. Palmer, Frank H. The Utility of Birds to Agricul- 

 ture. Massachusetts Agricultural Eeport, 1870-1872, 

 pages 107-120. 



An essay on economic importance of birds, special reference 

 being made to some thirty New England species. 



