

APPLIED ENTOMOLOGY 



AN INTRODUCTORY TEXT-BOOK ^>^°)S,. 





OF 

 INSECTS IN THEIR RELATIONS TO MAN 



BY 



H. T. FERNALD, Ph.D. 



PROFK880R OF ENTOMOLOGY, MASSACHUSETTS ACiRICULTUKAL 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 



