190 Wisconsin Atademy of Sciences^ Arts^ and Letters. 
Amaranthus retroflexus. 
Aphis cornifoUae Fitch. 
Aphis gillettei Cowen. 
Aphis maidi-radicis Forbes. 
Aphis papaveris Fabricius. 
Macrosiphum solmiifolii Ashmead. 
Trifidaphis radicicola Essig. 
Tychea phaseoli Passerini. 
Amaranthus spinosus. 
Aphis maidi-radicis Forbes. 
Ambrosia artemisifolia. 
Aphis maidi-radicis Forbes. 
Ambrosia psilostachya. 
Aphis ambrosia Refinesque. 
Macrosiphum ambrosiae Thomas. 
Ambrosia trifida. 
Aphis maidi-radicis Forbes. 
Aphis maidis Fitch. 
Macrosiphum ambrosiae Thomas. 
Macrosiphum erigeronensis Thomas. 
Macrosiphum rudbeckiae Fitch. 
Tychea radicola Oestlund. 
“Ambulaero aequasola”. 
Pterocallis pictus Ferrari. 
Amelanchier sp. 
Illinoia macrosiphum Wilson. 
Amelanchier alnifolia. 
Pemphigus alnifoHae Williams. 
Pemphigus corrugatans Sirrine. 
Amelanchier canadensis. 
Pemphigus corrugatans Sirrine. 
Amelamchier spicata=A. canadensis. 
Pemphigus alnifoliae Williams. 
Amelanchier ulmifolia. 
Pemphigus corrugatans Sirrine. 
