LETTER OF TRANSMITTAL. 



U. S. Department of Agkictjltuke, 



Bureau of Entomology, 

 Washington, D. C, May 28, 1906. 

 Sir: I have the honor to transmit herewith the manuscript of a 

 contribution, by Mr. J. L. Webb, on the Western Pine-destroying 

 Barkbeetle. It has special reference to the results of investigations 

 by Mr. Webb in central Idaho in 1905, but relates also to the results 

 of other investigations and to available information on the insect and 

 methods of combating it. I recommend its publication as Part II 

 of Bulletin No. 58 of this Bureau. The figures and plates are neces- 

 sary for the illustration of the text. 

 Respectfully, 



L. O. Howard, 

 Chief of Bureau. 

 Hon. James Wilson, 



Secretary of Agriculture. 



