ENTOMOLOGY 
WITH SPECIAL REFERENCE TO 
bis: BIQGLOGICAL AND ECONOMIC ASPECTS 
BY 
JUSTUS WATSON FOLSOM, Sc.D. (Harvarp 
INSTRUCTOR IN ENTOMOLOGY AT THE UNIVERSITY OF ILLINGIS 
With Five Plates (One Colored) 
and 300 Tert=Figures 
READE TPEIA : 
PPA kel SONS: SO Nic CO: 
1012 WALNUT STREET 
1906 
