OUR INSECT FRIENDS 

 AND ENEMIES 



THE RELATION OF INSECTS TO MAN, TO OTHER 

 ANIMALS, TO ONE ANOTHER, AND TO PLANTS 



WITH A CHAPTER ON 



THE WAR AGAINST INSECTS 



BY 

 JOHN B. SMITH, Sc.D. 



PROFESSOR OF ENTOMOLOGY IN RUTGERS COLLEGE; ENTOMOLOGIST TO THR 

 NEW JERSEY AGRICULTURAL EXPERIMENT STATIONS; NEW JERSEY 



STATE ENTOMOLOGIST; MEMBER AND FELLOW OF A. A. A. s.; 



N. Y. ACADEMY OF SCIENCES; ENTOMOLOGICAL 

 SOCIETY OF AMERICA ; ETC., ETC. 



PHILADELPHIA & LONDON 



J. B. LIPPINCOTT COMPANY 

 1909 



