Technical Series, No. 27, Part I, 



U. S. DEPARTMENT OF AGRICULTURE/ 



I3TJItE]A.XJ OW ENXOlVrOIjOG-Y. 



L. 0. HOWARD, Entomologist and Chief of Bureau. 



CLASSIFICATION OF THE ALEYRODID^E. 



PART I. 



BY 



A. L. QUAINTANCE, 



In Charge of Deciduous Fruit Insect Investigations. 



AND 



A. C. BAKER, 



Expert. 



Issued March 6, 1913. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1913. 



