ENTOMOLOGY 



WITH SPECIAL REFERENCE TO 



ITS BIOLOGICAL AND ECONOMIC ASPECTS 



BY 



JUSTUS WATSON FOLSOM, Sc.D. (HARVARD) 



INSTRUCTOR IN ENTOMOLOGY IN THE UNIVERSITY OF ILLINOIS 



TWlttb fftv>e HMates (tie Colored) 

 and 300 Gext 



LONDON : 



REBMAN, LIMITED, 



129, SHAFTESBURY AVENUE, W. C. 

 1906 



