6 PLANT-BUGS INJURIOUS TO COTTON BOLLS. 



conducting field observations, much credit is due Mr. J. P. Conduit 

 and Mr. J. A. Vaughan, of the TlahuaKlo Agricultural Company, 

 Tlahualilo, Durango, Mexico. Mr. B. F. Butler of the same com- 

 pany, manager of the Hacienda San Fernando, Lerdo, Durango, 

 Mexico, furnished valuable information concerning the comparative 

 grading of the cotton staple at infested and uninfested sections of 

 the Laguna district. All of the investigations reported in this 

 paper were conducted by Doctor Morrill, except where special credit 

 has been given in the text. Of the original text figures, numbers 

 2,3,4,5,6, 10, 11, 15, 16, 17, and 18 were drawn by Mr. J. F.Strauss, 

 of this Bureau, while the remainder are the work of the author. 



W. D. Hunter, 

 In Charge of Southern Field Crop Insect Investigations. 



