LETTER OF SUBMITTAL. 
Department of Agriculture, 
Division of Entomology, 
Washington, 7). 6\, January 14, 1886. 
r Sir: I have the honor to submit for publication Bulletin No. 11 of 
this Division, which contains in condensed, form the results of a series of 
^^experiments with insecticides, carried on by certain agents of the Divis- 
2 ion during the past summer. 
Respectfully, 
0. V. RILEY, 
Entomologist. 
Hon. Norman J. Oolman, 
Commissioner of Agriculture. 
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l\Th 
