L 



U. S. DEPARTMENT OF AGRICULTURE. 



FARMERS' BULLETIN No. 99. 



THREE INSECT ENEMIES OF SHADE TREES. 



BY 



L. O. HOWARD, 



ENTOMOLOGIST. 



[Reprinted, with some annotations by the author, from the Yearbook 

 of the Department of Agriculture for 1895.] 





WASHINGTON: 



G O V K R N M E N T PRINTING OFFICE. 

 1899. 



