U.S. DEPARTMENT OF AGRICULTURE. 



DIVISION OP ENTOMOLOGY. 



PERIODICAL BULLETIN. 



VOL. II. 



JULY, 1SS9, 



to 



JUNK, 1S90. 



INSECT LIFE. 



DEVOTED TO THE ECONOMY AND LIFE-HABITS OF INSECTS, 

 ESPECIALLY IN THEIR RELATIONS TO AGRICULTURE. 



KDITKD BY 



C. V. RILEY, Entomologist, 



AND 



L. O. HOWARD, First Assistant. 



WITH THK ASSISTA.NCK OF OTHER MEMBERS OV THK DIVISIONAL FORCE. 



:PUBLISHED by authority of the secretary of AGRICULTURE. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1S89-'90. 



