LETTER OF SUBMITTAL 
Department of Agriculture, 
Division of Entomology. 
Washington, D. <?., June 27, 1887. 
Sir: I have the honor to submit for publication Bulletin No. 15, from 
this Division, prepared under your instructions. 
Respectfully, C. V. RILEY, 
Entomologist . 
Hon. Norman J. Colman, 
Commissioner of Agriculture . 
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