U. S. DEPARTMENT OF AGRICULTURE. 



FARMERS' BULLETIN No, 99, 



<U LC M 



THREE INSECT ENEMIES OF SHADE TREES. 



L. O. HOWARD, 



ENTOMOLOGIST. 



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

 of the Department of Agriculture for 1895.] 



WASHINGTON : 



GOVERNMENT PRINTING OFFICE. 

 1899. 



