LETTER OF TRANSMITTAL. 
U. S. DEPARTMENT OF AGRICULTURE, 
Division oF ENnTroMoLoGy, 
Washington, D. C., February 6, 1901. 
Str: I have the honor to.transmit herewith copy fora Farmers’ 
Bulletin on insecticides. This bulletin will supplant Farmers’ Bulle- 
tin, No. 19, prepared in 1894, under my direction, by Mr. C. L. Mar- 
latt, first assistant entomologist. The latter publication has gone 
through four slightly revised editions, but has now been thoroughly 
revised and in large part rewritten by Mr. Marlatt, and considerable 
new matter has been added. I therefore recommend that it be reis- 
sued under a new number, to take the place of the older publication. 
The constant call for information on insecticides warrants the prompt 
publication of this bulletin in a large edition. 
Respectfully, 
L. O. Howarp, 
Lintomologist. 
Hon. JAMES WILson, 
Secretary of Agriculture. 
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