PKEFACE. 9 



The question of credit to the various investigators who have con- 

 tributed to this bulletin is r^ither complicated. Mr. E. A. Schwarz 

 studied carefully the hibernation of the weevil at Victoria, Tex., in 

 the winter of 1901-2 and his observations have been utilized. Later 

 ]\Ir. Wilmon Newell, secretary of the State Crop Pest Commission of 

 I^ouisiana, assisted by Mr. J. B. Garrett, planned and executed a 

 series of experiments in the hibernation of the weevil which was much 

 more extensive than any similar work that had been done up to that 

 time in this country. This work was done in cooperation with the 

 Bureau of Entomology, and the results, through the liberality of 

 Mr. Newell, have been largely incorporated into this bulletin. ^Ir. 

 J. D. Mitchell contributed important facts from observations during 

 several seasons, especially with reference to actual winter field con- 

 ditions. Many of the details in the plans for the extensive work of 

 1906-7 were worked out by Dr. W, E. Hinds, who also superintended 

 the extensive tedious work necessary during the following spring. In 

 all this work Doctor Hinds was assisted b}^ ]\Ir, W. AV. Yothers, by 

 Mr. A, C Morgan, who had charge of the work with the large cage 

 near Victoria, and by Mr. C. R. Jones, who was located at Calvert. 

 Mr. Yothers collaborated with Doctor Hinds in the arrangement and 

 correlation of the data obtained at the places mentioned and in placing 

 in manuscript form the records of many of the experiments of previous 

 years. For two winters Mr. Yothers carried on special observations, 

 largely of his own planning, as to actual field conditions. In this 

 work he collected large quantities of bolls and various forms of trash 

 in and about cotton fields, and from careful examinations of this 

 material in the laboratory he was able to determine many very impor- 

 tant facts in regard to the several classes of rubbish, or winter shelter, 

 which are most likely to protect weevils and to insure their successful 

 survival through the winter season. 



W. D. Hunter, 

 In Charge of Southern Field Crop 



Insect Investigations. 



