220 Wisconsin Academy of Sciences, Arts, and Letters. 
Pemphigus hursarius Linnaeus. 
RhizoMus sonchi Passerini. 
Trama horvathii Del Guercio. 
Trama troglodytes Heyden. 
Tychea erigeronensis Thomas. 
Cicuta virosa. 
Aphis angelicae Koch. 
Rhopalosiphum cicutae Koch. 
Siphocoryne nymphaeae Linnaeus. 
Siphocoryne pastinaceae Linnaeus. 
Cimicifuga sp. 
Aphis rumicis Linnaeus. 
Cineraria sp. , 
Aphis insita Walker. .. 
Macrosiphum circuinflexa Buckton. 
Macrosiphum solanifolii Ashmead. 
Macrosiphum urticae Schrank. 
Rhopalosiphum lactucae Kaltenbach. 
Rhopalosiphum persicae S^lzer. 
Cinchona sp. 
Pemphigus cinchofia Buckton. 
Cirsium altissiniuin=Cnicus altissimus. 
Aphis carduella Walsh. 
Cirsium arvensec^rCnicus arvensis. 
Aphis acanthi Schrank. 
Aphis cardui Linnaeus. 
Aphis castanea Koch. 
Aphis cirsina Ferrari. 
Aphis gossypii Glover. 
Aphis papaveris Fabricius. 
Aphis rumicis Linnaeus. 
Aphis terricola Rondani. 
Macrosiphum cirsii Linnaeus. 
Macrosiphum jaceae Linnaeus. 
Macrosiphum rudbeckiae Fitch. 
Macrosiphum serratulae Schrank. 
Macrosiphum sonchi Linnaeus. 
Myrus braggii Gillette. 
Myzus elaegni Del Guercio. 
Trama radicis Kaltenbach. 
Trama troglodytes Heyden. . 
