INDEX TO PAPERS RELATING TO FOOD OF BIRDS. 17 



CIRCULAR 57. Birds useful in the war against the cotton-boll weevil. 

 By H. W. Henshaw. 4 pp. Apr. 27, 1907. 



This circular directs attention to the importance of birds as enemies of the 

 boll weevil and to the need of protecting them. Orioles, the nighthawk, and 

 swallows are given special consideration and a few other species known to eat 

 boll weevils 'are mentioned. Measures for protecting and attracting swallows 

 are given. The suggestions for aiding the purple martin are especially full, 

 including remarks on colonization, food for young, the English sparrow as an 

 enemy, and the provision of martin houses. 



CIRCULAR 61. Hawks and owls from the standpoint of the farmer. 

 By A. K. Fisher. 18 pp. 6 figs. July 18, 1907. 



This circular condenses the information presented in Bulletin 3 and is a 

 direct revision of the article in the Yearbook for 1894 (pp. 215-232). Brief 

 summaries of the food habits of 33 species of hawks and owls are given, and 

 14 others are merely mentioned in the list of those classed as chiefly beneficial. 



CIRCULAR 64. Destruction of the cotton-boll weevil by birds in win- 

 ter. By Arthur H. Howell. 5 pp. 1 map. June 19, 1908. 



Thirty species of birds were discovered to feed upon the boll weevil in 

 winter. Every death of a weevil at that season "prevents the production of 

 very numerous progeny during the early summer and postpones the date when 

 the increase will become so great as to destroy the cotton squares as fast as 

 they appear." The more important species are the blackbirds, meadow larks, 

 sparrows, titlarks, wrens, and titmice. According to Howell's estimates titlarks 

 alone destroy about 72,000 boll weevils during the winter on each large plan- 

 tation. The circular ends with a tabulated seasonal record of the birds which 

 had eaten boll weevils. This list of 53 increases by 10 the number of species 

 reported in Bulletin 29. 



CIRCULAR 76. The California ground squirrel. By C. Hart Merriam. 



15 pp. 4 figs. (1 map). Nov. 25, 1910. 



Contains a few references to bird enemies of Citellus beechyi, and discusses 

 danger to small birds from poisoned grain laid for the ground squirrels. 



CIRCULAR 79. Our vanishing shorebirds. By W. L. McAtee. 9 pp. 



3 figs. April 8, 1911. 



The value of shorebirds has not been recognized in the past and they have 

 been hunted until only a remnant of their once vast numbers is left. The fact 

 that these birds have a decided economic value is demonstrated in this pub- 

 lication, and their protection is urged. The name ringed plover (Aeffialitis 

 hiaticula) near the bottom of p. 4 of this circular should be piping plover 

 (Aegialitis meloda). 



CIRCULAR 80. Progress of game protection in 1910. By T. S. Palmer 



and Henry Oldys. 36 pp. 1 fig. (map). June 29, 1911. 

 Classes the starling as injurious. 



CIRCULAR 81. Three important wild duck foods. By W. L. McAtee. 



19 pp. 19 figs. (3 maps). Sept. 9, 1911. 



Written primarily to furnish information on the methods of propagating 

 wild rice, wild celery, and pondweeds, this circular briefly notes the importance 

 of these plants as food for 37 species of wild ducks. A table on the first page 

 shows the percentages of the food of 16 species furnished by these plants. 

 51197 Bull. 4313 3 



