EDITOR’S PREFACE. 
B Y a resolve of the Legislature of Massachusetts, 1859, chap. 
93, I was directed to issue a new edition of Dr. Harris’s 
admirable Treatise on Insects Injurious to Vegetation, with suitable 
additions and illustrations. 
By a resolve of the Legislature of 1861, chap. 80, I was author- 
ized to use the plates prepared for the illustration of the edition 
for the Commonwealth, in the publication of one or more editions 
designed for a wider circulation than that for the State could be 
expected to have. 
It was thought best to insert the additions contemplated in 
the resolve, in the form of foot-notes. No alterations have been 
made in the author’s language, and the additional notes are en- 
closed in brackets to distinguish them from those in the former 
editions. Large additions have been made to the text, however, 
from the author’s own manuscripts. These will be found exclu- 
sively in the chapter upon the butterflies. In giving a somewhat 
wider significance to the title, I have but carried out the plan 
adopted by the author in his last revision of the work. 
Professor Louis Agassiz very kindly offered to supervise the 
drawings, comparing them with the original specimens before en- 
graving. It is believed that very great scientific accuracy has 
thus been secured in the illustrations. Special acknowledgments 
are due to Professor Agassiz for this valuable service, and also for 
assistance rendered by way of suggestion and advice throughout. 
Acknowledgments are also due to the following gentlemen, who 
have contributed notes on the subjects named : — Dr. John L. 
Leconte, of Philadelphia, on the Coleoptera ; Philip R. Uliler, 
