U. S. DEPARTMENT OF AGRICULTURE. 
DIVISION OF ENTOMOLOGY. 
Bulletin No. 13. 
REPORTS 
OF 
OBSERVATIONS AND EXPERIMENTS 
THE PRACTICAL WORK OF THE DIVISION, 
MADE 
UNDER THE DIRECTION OE THE ENTOMOLOGIST. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1887. 
17528— No. 13 
