INSECTS AND HUMAN 



WELFARE i^^^\ 



AN ACCOUNT OF THE MORE IMPORTANT RELATION^^J^^ "T 

 OF INSECTS TO THE HEALTH OF MAN, TO '® 



AGRICULTURE, AND TO FORESTRY 



BY 



CHARLES THOMAS BRUES 



ASSISTANT PROt'ESSOR OF ECONOMIC ENTOMOLOGY, RUSSEY INSTITUTION 

 HARVARD UNrV'ERSITY- 





CAMBRIDGE 

 HARVARD UNIVERSITY PRESS 



IX)NDON: HUMPHREY MILFORD 

 Oxford Umvebsitt Press 



1920 



