Genera. 
Myzocallis,. Pass. 
Lachnus, Illig. 
Callipterus, Koch. 
Sipha, Pass. 
Phyllaphis, Koch. 
Schizoneura, Hartig. 
Glyphina, Koch. 
Vacuna, Ilevd. 
Pemphigus, Hartig. 
Tetraneura, Hartig. 
Aploneura, Pass. 
Chermes, Linn. 
Phylloxera, Fonsc. 
Trama, Ileyd. 
Paracletus, Pass. 
Forda, Heyd. 
Rhizobius, Burnt. 
Tychea, Koch. 
Typical species. 
Myzocallis hyperici. Thos. 
Lachnus salicicola, Uhler. 
Callipterus quercifolii, Thos. 
JSipha rubifolii, Thos. 
Aphis fagi, Linn. 
Aphis lanigefa, Hausra. 
Byrsocrypta ulmicola, Fitch. 
Pemphigus populicaulis, Fitch 
Aphis ulini, Geoff. 
Chermes pinifoliae, Fitch. 
Phylloxera vitifoliae, Fitch. 
Rhizobius lactucae, Fitch. 
Tychea panici, Thos. 
