148 
BIBLIOGRAPHY OF ECONOMIC RELATIONS OF BIRDS 
Feeding habits of ground beetles, with discussion of rela- 
tion to birds. 
1880. Webster, F. M. Notes upon the Food of Predaceous 
Beetles. Bulletin Illinois State Laboratory Natural 
History, v. I, pp. 149-152. 
Observations on food habits of ground beetles and others 
that birds feed upon. 
1881. Aldrich, Charles. Value of the House Wren as an 
Insect Destroyer. American Naturalist, v. XV, p. 318. 
Hardiness, sociability, love of locality, wonderful fecundity, 
render it one of the most valuable of our insectivorous birds. 
1881. Bumrus, H. C. The Habits of the Yellow-Bellied Wood- 
pecker. American Naturalist, v. XV, p. 738. 
A proof that they are sap eaters, if not also bark eaters. 
1881. Forbes, S. A. Supplementary Report on the Food of 
the Thrush Family. Transactions Illinois State Hor- 
ticultural Society, 1880, v. XIV, pp. 106-126. 
Comparison between earlier and more recent tables of the 
food of the thrushes of Illinois. (Transactions Illinois 
State Horticultural Society, 1879, v. XIII, pp. 120-172), with 
additional notes on the food of this family, followed by a 
detailed account on the food of the bluebird. 
1881. Lockwood, Samuel. The Eastern Snow Bird. Ameri- 
can Naturalist, v. XV, p. 524. 
Note on exportation as a trade. 
1882. Allen, C. A. The Birds. New Hampshire Agricul- 
tural Report, 1881, pp. 269-282. 
Discussions on the following topics: Useful birds; war- 
blers, fly-catchers, swallows, creepers, woodpeckers, and 
thrushes. Singular habits of birds; the cow bunting. Birds 
injurious to farmers; a list comprising the crow and blue jay, 
species of hawks (coopers, duck, pigeon, sparrow, sharp- 
shinned, gas-, red-tailed, red-shouldered), and two species of 
owls (horned and earved). Plumage birds; descriptions of 
some of the brightest colored birds occurring in New Hamp- 
shire. 
1882. Forbes, S. A. The Ornithological Balance Wheel. 
Transactions Illinois State Horticultural Society, 1881, 
