A List of the Species of the Tribe Aphidini, family 
Aphidae, found in the United States, which 
have been heretofore named, with 
descriptions of some 
New Species. 
By CYRUS THOMAS, Ph. D. 
Printed Dec. 13th, 1877. 
A Synoptical Table of the Sub-families of Aphidae, as 
GIVEN BY BuCKTON. 
I. Front wings with three discoidal veins, the third twice forked: hind 
wings with two discoidal veins. 1. Aphidinae. 
II. Front wings with three discoidal veins, third with one fork ; hind 
• wings with two discoidal veins. (One in Colopha.') 2. Schizoneurinae. 
III. Front wings with three discoidal veins, all simple : hind wings with 
one or two discoidal veins. 3. Pemphiginae. 
IV. Front wings with the third discoidal vein wanting ; sometimes never 
acquiring wings. 4. Chermesinae. 
The first sub-family, Aphidinae, is further divided by Buckton into two 
tribes as follows : 
I. Antennae seven-jointed, Tribe 1, Aphidini. 
II. Antennae six-jointed, Tribe 2, Lachnini. 
These characters, however, are calculated to deceive, as the sixth joint 
in many species of the second tribe consists of two parts, corresponding to 
the sixth and seventh joints in the first ; in fact, the author speaks of these 
antennae as seven-jointed. The first of these tribes corresponds to Passer- 
ini’s sub-family Aphidinae. 
