LETTER OF TRANSMITTAL 
U. S. Department of Agriculture, 
Bureau of Entomology, 
Washington, D. C, February 6, 1909. 
Sir: I have the honor to transmit herewith a manuscript entitled 
1 ' Fumigation Investigations in California. " 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 B u rea u. 
Hon. James Wilson, 
Secretary of Agriculture. 
