SYNOPTICAL KEY TO THE APHIDADAE OF MINNESOTA It5 
been suggested which may seem to complicate the classification rather 
than simplify it, but the taxonomist, as he finds new relationships and 
differences, requires terms to express them, be these specific, generic, 
or of higher order. 
5e-Horgwaphidini 22-Tetraneurini 14.Wacroaiphini 8. Aphidinit 
24. Pemphigini 21.Fordini 1Z%.Mioroeiphini T.Hyelopterini 
24.-Prooiphilini 20.Scechironeurini 12.Mysini 
I 
PEWMFHISZA 
H E c 
SCHIZONEUREA NACROSYPHBA APHIDEA 
Epo 
19.Vacunitni 11.Drepanociphini] 6.Chaitophorini 
18. Anoeciini 19.Calliptecrini 5-Pterocomnini 
17.Tereliini 9.Celsaphidini 
lv 16. Phyllaphidini 
Fpoch 
G D e 
PRYLLAPFIDEA CALLIPTERSA CHELITOPHIDREA 
15.Hinderini 4-Tresini 
§.Pterochlorin: 
vekulschnint 
ITI 
Epoch 1. Lachnini 
z A 
MINDAZEA LACHNEA 
1] 
Fpoch Penrphizinae Aphidinee 
1 Aphididae 
Epoch 
heey Oh ELE A PHT DARLO RS MEN NB SORA: 
1. Superfamily APHIDOIDEA. It is now generally conceded 
that Chermes and Aphis represent distinct families, the Chermesidae 
and the Aphididae. Together they form the superfamily Aphidoidea 
or Aphidodea of Mordwilko. Some would prefer the term Phyllox- 
eridae in place of Chermesidae, but there are no good reasons for 
