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. Apliidinae. 



II. Front wings with three discoidal veins, third with one fork ; hind 

 wings with two discoidal veins. (One in Colopha.') 2. Schhonevrinae. 



III. Front wings with three discoidal veins, all simple : hind wings with 

 one or two discoidal veins. 3. Femplwjinae . 



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 ] , Apludini. 



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 Apliidinae. 



