4 PREFACE 



with the importance of such knowledge to the future husband- 

 men, and anticipating that the study of Economic Entomology, 

 will, from necessity j be taught in the near future in the Public 

 Schools, this book has been written with special reference to 

 its use as a text-book and as a preparatory course for the study 

 of more advanced works 



To enable our teachers to teach this branch of natural his- 

 tory, even without previous training for it, a Key to this book 

 has been prepared and published in a separate volume. 



The scientific, or technical, names of the various insects 

 referred to in this work are not always given in the text, but 

 will be found in the Index, attached to the common names of 

 the insects 



In the arrangement of the Orders I have followed that given 

 by Dr. A. S. Packard, in his "Guide to the Study of Insects." 



The Families of the Orders Lepidoptera, Orthoptera, and 

 Neuroptera are given in full, as far as the insects are found in 

 the United States ; of the other Orders, only the most promi- 

 nent Families are mentioned 



Of the illustrations many are taken from my work, ''Injuri- 

 ous Insects of the Orchard, Vineyard," etc. ; to which others 

 have been added, obtained chiefly from Professor C. V. Riley. 

 Twelve were copied from Packard's ''Guide to the Study of 

 Insects;" several from the Smithsonian Institution publica- 

 tions, and also from Dr. Emmons' "New York Reports;" 

 Nos. 89 and 103 were copied from the "Illinois Reports." 

 The "Pacific Rural Press" kindly furnished the illustrations 

 of scale-insects and their parasites. 



While engaged in this work, I have freely consulted the 

 books of Professors C. V. Riley, Cyrus Thomas, G. H. French 



