LETTER OF SUBMITTAL. 
Department of Agriculture, 
Division of Entomology, 
Washington , D. <7., March 15, 1887. 
Sir : I have the honor to submit for publication Bulletin No. 13 of 
this Division. This Bulletin comprises such of the reports of the agents 
of the Division for the season of 1886 as were necessarily excluded from 
the Annual Report for lack of space. 
Respectfully, 
C. Y. RILE!, 
Entomologist. 
Hon. Norman J. Colman, 
Commissioner of Agriculture. 
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