U.S. DEPARTMENT OF AGRICULTURE. 



DIVISIOX OF EXTOMOLOGY. 



PERIODICAL BULLETIN. (Double number.) May and June, 1890. 



Vol. II. 



]N'os. 11 and 12. 



INSECT LIFE. 



DEVOTED TO THE ECONOMY AND LIFE-HABITS OF INSECTS, 

 ESPECIALLY IN THEIR RELATIONS TO AGRICULTURE. 



EDITED BY 



C. V. RILEY, Entomologist, 



AND 



L. O. HOWARD, First Assistant, 



WITH THE ASSISTANCE OF OTHEK MEMBERS OF THE DIVISIONAL FORCE. 



[PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE.] 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 

 1890. 



