LETTER OF TRANSMITTAL. 
His Excellency, 
Minnesota Experiment Station, 
St. Anthony Park, Minn., 
June 15, 1914. 
A. O. EBERHART. 
Dear Sir : — I have the honor to transmit herewith the manu- 
script of a paper entitled ‘‘Some Tree-destroying Insects,” by 
Professor A. G. Ruggles, of the Division of Entomology of the 
Minnesota Experiment Station. 
The increasing injury to our shade and fruit trees from insect 
attack makes the information contained herein valuable to all of our 
citizens. I, therefore, respectfully recommend its publication as 
Circular No. 30, of the State Entomologist’s Department, which, 
by law, is under your supervision. 
Respectfully yours, 
F. L. WASHBURN, 
State Entomologist. 
Approved : 
A. O. EBERHART, 
Governor of Minnesota. 
