U. S. DEPARTMENT OF AGRICULTURE. 

 division of entomology. 



Bulletin No. 13. 



REPORTS 



OF 



OBSERVATIONS AND EXPERIMENTS 



IN 



THE PRACTICAL WORK OF THE DIVISION, 



MADE 



UNDER THE DIRECTION OF THE ENTOMOLOGIST. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1887. 

 17528— No. 13 



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