250 Wisconsin Academy of Sciences^ Arts^ cind Letters, 
Gratiola officmalls. 
Aphis cMoris Koch. 
Macrosiphum pisi Kaltenbach. 
Macrosipfium ulmariae Schrank. 
Grindelia squarrosa, 
Anoecia corni Fabricius. 
Atarsos grindeUae Gillette. 
Macrosiphum grindeUae WilliamS'. 
Hamamells Yirgmlana. 
Hamamelistes cornu Sbimer. 
Hamamelistes spinosus Shimer. 
HormapMs hamamelidis Fitch. 
Hedera helix. 
Aphis angelicae Koch. 
Aphis hederae Kaltenbach. 
Aphis hederella Theobald. 
Macrosiphum hederae Theobald. 
Pemphigus hederae Horvath. 
Rhopalosiphum persicae Sulzer. 
Helenium hoopesli. 
Macrosiphum heleniella Cockerell. 
Macrosiphum martini Cockerell. 
Hehanthemum *‘teiiiilfolmin”. 
Aphis maidi-radicis Forbes. 
Hehanthemiim ^oilgare. 
Aphis helianthemi Ferrari. 
Hellaaithus annims. 
Aphis helianthi MonelL 
Aphis maidi-radicis Forbes. 
Hellanthus diva-ricatus. 
Aphis helianthi MonelL 
HeUanthiis giganteus. 
Aphis helianthi MonelL 
HeUanthus grosse-serratus. 
Aphis helianthi MonelL 
