LETTER OF TRANSMITTAL. 



U. S. Department of Agriculture, 



Bureau of Entomology, 



Washington, D. C, February 6, 1909. 

 Sir: I have the honor lo transmit herewith a manuscript entitled 

 ' ' Fumigation Investigations in Cahf ornia. " It is a preliminary report 

 on the subject, and contains much information which will be of direct 

 practical value to citrus growers. The report is one of progress, and 

 much of the information has already been made available to the public 

 by means of lectures and field demonstrations, but it is important 

 that it should be put in published form so as to give it wider cur- 

 rency. The subject is one that requires abundant illustration, and 

 the figures and plates submitted are all deemed necessary for the 

 full understanding of the text. 



Respectfully, L. O. Howard, 



Entomologist and Chief of Bureau. 

 Hon. James Wilson, 



Secretary of Agriculture. 



