TO OBSERVERS. 



The reader having carefully perused the excellent remarks of 

 Dr. STEWART on the several varieties of shade trees best adapted for 

 the climate in and about the City of Peoria, will observe that, 

 however much care and labor is expended in procuring the kinds 

 recommended, the insect foes are ready to commence their ravages, 

 and unless careful attention is given them, will mar if not destroy 

 the fruits of the expended labor. 



The following treatise is intended to point out and describe the 

 most destructive insects found in our city, and the simplest as well 

 as most effectual remedies known for their destruction. I would 

 call particular attention to the maple tree bark-louse Lecanium 

 Acericola, found at the present time in such numbers upon the 

 aforesaid tree. This insect appeared in Davenport, Iowa, during the 

 years 1870 and 1872, in such numbers as to excite much attention, 

 but the natural enemies came to the rescue and destroyed many of 

 them. Whether they will appear here or not remains to be seen. 



EMMA A. SMITH. 



