DlV-lUStOTS 



Technical Series, No. 25. 



U. S. DEPARTMENT OFM.GRICULTURE, 



L. O. HOWARD, Entomologist and Chief of Bureau. 



PAPERS ON APHIDID^. 



COISTTENTS AND II^DEX. 



Issued April 26, 1915. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1915. 



