194 Wisconsin Academy of Sciences^ Arts^ and Letters. 
Arabis sp. 
Macrosiphum circumflexa Buckton. 
Arabis canadensis. 
Aphis araMs-molUs Rafinesque. 
Aralia hlspida. 
Aphis aralia-Mspida Reflnesque. 
Arenaria sp. 
Macrosiphum jaceae Linnaeus. 
Arbutus menzeisil. 
Rhopalosiphum arhuti Davidson. 
Arbutus unedo. 
Aphis arduti Ferrari. 
Archangelica sp. 
Aphis archangelicae Scopoli. 
Arctium sp. 
Aphis heraclei Koch. 
Aphis radicola Mordwilko. 
Arctium lappa. 
Aphis angelicae Koch. 
Aphis cardui Linnaeus. 
Aphis gossypii Glover. 
Aphis rumicis Linnaeus. 
Aphis symphiti Schrank. 
Macrosiphum hieracii Schrank. 
Macrosiphum hieracii Kaltenbach. 
Arctium minus. 
Aphis lappae Koch. 
Aphis rumicis Linnaeus. 
Arctostaphylos pumila. 
Cryptosiphum tahoense Davidson. 
Arctostaphylos tomentosa. 
Cryptosiphum tahoense Davidson. 
Arctostaphylos uva-ursi. 
Phyllaphis coweni Cockerell. 
