^1 



t»l. 



SM' 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 THB 



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 



