A SPECIES LIST OF THE APHIDIDAE OF THE WORLD 
AND THEIR RECORDED FOOD PLANTS 
By H. F, Wilson 
AND 
R. A. Vickery 
PREFACE 
The Apkididae, aside from their great economic importance, 
are very interesting objects for observation and their peculiar 
life histories and habits, both above and below ground, give 
added zest to the study of this insect group. 
The evidence before us shows that the majority of species of 
aphids are confined to certain definite food plants, and the de¬ 
termination of any one species is made more easy when the food 
plant upon which it occurs is known. 
Realizing this to be true the following paper has been com¬ 
piled. We realize that additional valuable data might have been 
included and a catalog prepared, but such was not the object in 
mind. We have purposely omitted all attempts at synonomy 
for both genera and species because we feel that the existing 
chaotic condition in this group can be better taken care of in a 
paper dealing with those phases alone. It is hoped that such a 
paper may be issued in the near future. No names given as 
trinomials have been included in this paper. 
No doubt a more up-to-date selection of generic names might 
have been used, and some inconsistencies are known to be present. 
During the past few years a great activity has been taking place 
in the breaking up of the old groups to form new ones and many 
generic names have been provided which will probably not 
withstand a revision. We have therefore taken the liberty to 
select older names except in cases where the new species form 
