PUBLISHERS' PREFACE. 



The assertion that cultivation of all plants, whether on 

 the farm, in the orchard or garden, is largely a struggle 

 with insects, has been strikingly illustrated within the 

 past few years. The standard works upon Entomology 

 include the harmless as well as the injurious insects, and 

 are written with reference to the identification of the spe- 

 cies rather than to show how they may be destroyed. In 

 view of the need of a work giving an account of the most 

 destructive insects and the present knowledge of the 

 methods of preventing their ravages, the Publishers in- 

 vited Mrs. Treat to prepare the present volume. The 

 fact that she has largely availed herself of the works 

 of Prof. Riley, U. S. Entomologist, gives this book a 

 special value. 



