142 BIBLIOGRAPHY OF ECONOMIC RELATIONS OF BIRDS 
Abstract of an article by Professor Treadwell of Cam- 
bridge, Mass., directed to the Boston Society of Natural 
History, and containing a detailed account of the food 
required by two young robins, captured when about half 
grown. 
1862. Flagg, Wilson. Utility of Birds. Massachusetts 
Agricultural Report, 1861, pp 70-78. 
Long essay on the economic value of birds with numerous 
notes on food habits of certain species, some of them from 
original observations. 
1864. Michener, E. Agricultural Ornithology. Insectivor- 
ous Birds of Chester County, Pennsylvania. U. S. 
Department of Agriculture, Report, 1863, pp. 287- 
307. 
The value of birds to the agricultural interests discussed, 
and followed by a list of the birds of Chester county, Penn., 
with the exception of the water species. Brief notes on the 
food and habits of each bird are given. 
1864. Sami els, E. A. Mammalogy and Ornithology of New 
England with special reference to Agricultural Economy. 
U. S. Department of Agriculture, Report, 1863, pp . 
265-286. 
Outlines of the classification of mammals, birds, and 
insects with brief notes on the economic importance of each 
order from an agricultural standpoint. Also a more general 
discussion of the relations between the birds and mammals 
and the former, and the causes which tend to alter them. 
1865. Dodge, J. R. Birds and Bird Laws. IT. S. Depart- 
ment of Agriculture, Report, 1864, p. 431. 
Treats of the uses of birds, the necessity of a balance in 
animal production, value of birds as insect destroyers; the 
refutation of false charges against them and manner of pro- 
tecting them; and gives in conclusion a digest of the bird 
and game laws then existing in most of the eastern and 
central states. 
1865. Elliot, D. G. The “Game Birds” of the United 
States. U. S. Department of Agriculture, Report, 
1864, pp. 356-385. 
