302 Wisconsin Academy of Sciences, Arts, and Letters. 
Populus trichocarpa. 
Chaitophorus populicola Thomas. 
Chaitophorus salicicola Essig. 
Eichochaitophorus populifolii Essig. 
Pemphigus populi-transversus Riley. 
Phylloxera popularia Pergande. 
ThecaMus popuUcaulis Fitch. 
Thecahius populi-conduplifolius Cowen. 
Thecahius populi-monilis Riley. 
Portiilaca sp. 
Rhopalosiphum persicae Sulzer. 
Portulaca oleracea. 
Aphis gossypii Glover. 
Aphis lahurni Kaltenbach. 
Aphis maidi-radicis Forbes. 
Myzus portulacae Macchiati. 
Potamogeton crispus. 
Siphocoryne numphaeae Linnaeus. 
Potamogeton natans. 
Rhopalosiphum najadum Koch. 
Siphocoryne nymphaeae Linnaeus. 
Potamogeton pectinatns. 
Siphocoryne nymphaeae Linnaeus. 
Potentilla anserlna. 
Aphis potentillae Walker. 
Macrosiphum potentillae Oestlund. 
Myzus potentillae Oestlund. 
Myzus potentillae Williams. 
Myzus rosarum Kaltenbach. 
Phorodon galeopsidis Kaltenbach. 
Potentilla arguta. 
Myzus potentillae Williams., 
Potentilla hipplana. 
Macrosiphum martini Cockerell. 
Potentilla reptans. 
Phorodon galeopsidis Kaltenbach. 
Potentilla recta. 
Rhopalosiphum persicae Sulzer. 
