APPLIED ENTOMOLOGY 



AN INTRODUCTORY TEXT-BOOK 



OF 

 INSECTS IN THEIR RELATIONS TO MAN 



BY 



H. T. FERNALD, PH.D. 



PROFESSOR OF ENTOMOLOGY, MASSACHUSETTS AGRICULTURAL COLLEGE, AND 



ENTOMOLOGIST OF THE MASSACHUSETTS AGRICULTURAL 



EXPERIMENT STATION 



FIRST EDITION 



McGRAW-HILL BOOK COMPANY, INC. 



NEW YORK: 370 SEVENTH AVENUE 



LONDON: 6 & 8 BOUVERIE ST., E. C. 4 



1921 



