UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 826 



Contribution from the Bureau of Entomology 

 L. O. HOWARD, Chief 



Washington, D. C. 



PROFESSIONAL PAPER 



August 10, 1920 



GENERIC CLASSIFICATION OF THE 

 HEMIPTEROUS FAMILY APHIDIDAE 



By 



A. C. BAKER, Entomologist 

 Deciduous Fruit Insect Investigations 



CONTENTS 



Superfamily Aphidoidea 2 



Phylogeny of the Aphididae 3 



Key to the Subfamilies of the Aphididae 10 



Subfamily I, Aphidinae 10 



Tribe Lachnini . 12 



Tribe Thelaxinl 20 



Tribe Cailipterini . . 21 



Tribe Greenideini 37 



Tribe Setaphidini 38 



Tribe Aphldini 39 



Subfamily II, Mindarinae %<..... 61 



Page 



Subfamily III, Eriosomatinae 62 



Tribe Eriosomatini 65 



Tribe Pemphigini 68 



Tribe Melphini 73 



Tribe Prociphilini 75 



Tribe Fordini 77 



Subfamily IV, Hormaphidinae .... 81 



Tribe Hormaphidini 83 



Tribe Oregmini 84 



Tribe Cerataphidini 86 



Genera Not Placed 88 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1920 



