IIV ^ JUSICI 



Technical Series, No. 27. 



U. S. DEPARTMENT OF AGRICULTURE. 



^ BXJRICAXJ OW E:TsrTOM:OI..OGY. 



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



CLASSIFICATION OF THE ALEYRODID.E. 



CONTENTS AND INDEX. 



Issued February 13, 1915. 



WASHINGTON: 

 GOVERNMENT PRINTING OPFIOE. 

 1916. 



