14 INDEX TO PAPERS RELATING TO FOOD OP BIRDS. 



ibises, gulls, hawks, and owls. In many cases a brief summary of the general 

 food habits of the species is given, and notes on the diet of the same bird in the 

 Old World or of related European species are also presented. 



Bulletin 32. Food habits of the grosbeaks. By W. L. McAtee. 92 

 pp. 4 pis. (3 colored). 40 figs. Feb. 29, 1908. 

 The pine and evening grosbeaks receive only passing mention, but the car- 

 dinal, gray, rose-breasted, black-headed, and blue grosbeaks are discussed in de- 

 tail. The account of each species includes a description of the appearance of 

 the bird, its distribution and habits, the details of its vegetable and animal 

 food, mineral matter found in the stomachs, and the food of the nestlings and 

 other young birds. Lists of the seeds, fruits, and invertebrates eaten by each 

 species are given. One chapter discusses the relations of grosbeaks and other 

 birds to parasitic insects. Some mention is made of the food of about 30 species 

 of birds besides grosbeaks, these references occurring mainly in lists of bird 

 enemies of rose chafers and potato beetles and in an account of birds that feed 

 on mulberries. 



Bulletin 33. The brown rat in the United States. By David E. 

 Lantz. 54 pp. 3 pis. 4 figs. May 29, 1909. 



Four owls and seven hawks are mentioned among the natural enemies of the 

 brown rat. One of the owls is said to attack also the black rat. 



Bulletin 34. Birds of California in relation to the fruit industry. 

 Part II. By F. E. L. Beal. 96 pp. 6 colored pis. Aug. 8, 1910. 



This bulletin continues the account of the food habits of California birds be- 

 gun in Bulletin 30. It states that only four of the species of birds common in 

 California (the linnet, California jay, Steller jay, and red-breasted sapsucker) 

 can be regarded as of doubtful utility. The animal and vegetable food of 32 

 species is fully treated, especially in relation to fruit culture. As in Part I the 

 food of the young is a special feature. Nestlings of 9 species were studied and 

 reported upon, the fullest accounts dealing with the California towhee and the 

 black-headed grosbeak. Part I discussed one species of the sparrow family, that 

 worst fruit pest, the linnet, and important species of the families Tanagridae 

 (tanagers) to Turdidse (thrushes) in the order of the check-list of North 

 American Birds by the American Ornithologists' Union. Part II deals with 

 the principal species in the families Tetraonidaa (grouse and quails) to Frin- 

 gillidre (sparrows, finchest and grosbeaks). 



Bulletin 37. Food of the woodpeckers of the United States. By 

 F. E. L. Beal. 64 pp. 6 pis. (5 colored). 3 figs. May 24, 1911. 

 The accumulation of woodpecker stomachs in the 16 years since the publica- 

 tion of Bulletin 7 enabled Professor Beal to present in Bulletin 37 formal re- 

 ports on the food habits of 16 species, 9 more than were treated in the pre- 

 liminary report. Brief notes upon the food of 6 other species also are included; 

 the food of 11 species of woodpeckers which were not even mentioned in Bul- 

 letin 7 is discussed. Tables are given showing the comparative rank of the 

 species as consumers of animal and vegetable food and of ants and beetles. 



Bulletin 38. Birds of Arkansas. By Arthur H. Howell. 100 pp. 

 7 pis. (1 colored map). 4 figs. (maps). Oct. 12, 1911. 

 A section of the introduction to this bulletin is devoted to a general state- 

 ment of the economic value of birds, and brief notes on the food of 126 species 

 are scattered through the text. 



