12 INDEX TO PAPEKS EELATING TO FOOD OF BIRDS. 



gation, are considered at length. The food is dealt with under the following 

 topics : Grain, weed seeds, mast and pine seeds, fruits, leaves and buds, beetles, 

 bugs, grasshoppers and allied insects, caterpillars, miscellaneous animal food, 

 and food of the young. One hundred and twenty-four different insects and 

 other animals were identified in the stomachs and 138 seeds and fruits. 

 Information of the same character, briefer in all cases, the volume depending 

 on the number of stomachs available for examination, is given for six other 

 species of quails. 



BULLETIN 22. Birds known to eat the boll weevil. By Vernon 



Bailey. 16 pp. 1905. 



This bulletin is a preliminary report on the investigations of boll-weevil- 

 eating birds. Notes are given on 11 species of birds in whose stomachs E. A. 

 Schwarz of the Bureau of Entomology found boll weevils and on 9 species 

 added to this list by investigations by the Biological Survey. The field work 

 was done by James G. Gaut and Vernon Bailey; the stomachs were examined 

 by F. E. L. Beal. 



BULLETIN 23. The horned larks and their relation to agriculture. 



By W. L. McAtee. 37 pp. 2 pis. 13 figs. 1905. 

 The horned larks of the United States belong to a single species composed 

 of 21 subspecies. Their food habits are treated collectively in this bulletin, 

 except for a Californian subspecies (Otocoris alpestris actia), which owing to 

 environment is considerably more vegetarian than the other members of the 

 group. The general habits and economic relations are first discussed, then the 

 vegetable food is considered under the following heads: Wheat, corn, oats, 

 other grains and forage plants, weeds, fruit, and miscellaneous vegetable food. 

 The animal food, mineral matter, and food of the nestlings and other young 

 horned larks precede the account of the California subspecies. This is followed 

 by the summary and a list of seeds, fruits, and invertebrates eaten by the horned 

 larks, which includes 77 items of animal food and 104 of vegetable. 



BULLETIN 24. The grouse and wild turkeys of the United States and 

 their economic value. By Sylvester D. Judd. 55 pp. 2 pis. 

 (1 colored). 1905. 



The food habits of 12 species of grouse and the wild turkey are described 

 in this bulletin, the fullest accounts dealing with the prairie hen and the 

 ruffed grouse. The insect food, which generally includes a goodly proportion 

 of grasshoppers, and the vegetable food, characterized by the preponderance of 

 berries, buds, and leaves, or browse, are discussed in detail. In the case of 

 the ruffed grouse no fewer than 45 items of animal food and 120 of vegetable 

 are listed. 



BULLETIN 25. Birds that eat the cotton-boll weevil. A report of 



progress. By Arthur H. Howell. 22 pp. 1906. 

 This " report of progress " on the boll-weevil investigation adds 8 species to 

 the list in Bulletin 22, making 28 in all known to feed on the weevil. The 

 most important notes are those on the orioles, nighthawk, and flycatchers. 

 On pages 19-20 is a brief discussion of the relations of birds to cotton w r orms. 

 Tables giving the records of birds examined which had and w r hich had not eaten 

 boll weevils conclude the paper. The field work done since the publication of 

 the first report (Bulletin 22) was by A. H. Howell; the stomachs were exam- 

 ined by F. E. L. Beal and W. L. McAtee. 



