15 



of an insect by laboratory investigations is by no means the least 

 important of the results of the investigation. 



In general the laboratory investigations have been under the direc 

 tion of the senior author, Mr. W. D. Hunter, but practically all of 

 the labor of preparing detailed outlines and of executing or supervis- 

 ing the execution of the laboratory work has devolved upon the junior 

 author, Mr. W. E. Hinds, who has been in charge of the boll weevil 

 laboratory. In addition to the assistants, Messrs. A. W. Morrill and 

 G. H. Harris, whose work was incorporated in the original publication 

 (Bulletin 45), the most important observations and experiments of the 

 following field agents have contributed to the publication in its pres- 

 ent form: Messrs. C. M. Walker, W.*D. Pierce, W. A. Hooker, W. W. 

 Yothers, A. C. Morgan, J. C. Crawford, and S. Goes. Besides these, 

 Prof. H. A. Morgan, the secretary of the Louisiana Crop Pest Com- 

 mission, has suggested many lines of investigation. Mr. James Hull, 

 of Victoria, Tex., was emplo^-ed for several months in making a 

 thorough study of cotton-ginning machinery. 



Specifically, all of the present bulletin, except the portion preceding 

 the topic '^Life History," p. 30, and the topics following the subject 

 "Futile Methods Frequently Suggested," p. 159, with the further 

 exception of the topic upon "Birds," p. 150, has been written by the 

 junior author. The illustrations used are from photographs taken for 

 the work by the junior author, with the exception of the text figures 

 and the illustrations of "Insects mistaken for the boll weevil," of 

 which those marked "original" are, with one exception, from draw- 

 ings prepared by the Bureau of Entomology. 



