LETTER OF TRANSMITTAL. 



U. S. Department of Agricitltube, 



Bureau of Entomology, 

 Washington, D. C, October 6, 1908. 

 Sir: I have the honor to transmit herewith for pubhcation as 

 Bulletin No. 77, of the Bureau of Entomology, a manuscript prepared 

 by Dr. W. E. Hinds and Mr. W. W. Yothers under the direction of 

 Mr. W. D. Hunter. This manuscript deals with the hibernation of 

 the Mexican cotton boll weevil. The winter season is a critical period 

 in the life history of this very destructive pest. An exact knowledge 

 of its hibernation throws much light on practical control. For 

 this reason careful experimental studies have been carried on for 

 several years. On account of their importance the results are pre- 

 sented somewhat in detail. The illustrations will add greatly to the 

 clearness and force of the text. 

 Respectfully, 



L. O. Howard, 

 Entomologist and Chief of Bureau. 

 Hon. James Wilson, 



Secretary of Agriculture. 

 2 



