348 Wisconsin Academy of Sciences, Arts, and Letters. 
Ulmus campestris. 
Callipterus elegans Koch. 
Colopha compressa Koch. 
Lachnus platani Kaltenbach. 
Pemphigus caerulescens Passerini. 
Schizoneura lanuginosa Hartig. 
Schizoneura ulmi Linnaeus. 
Tetraneura alba Ratzeburg. 
Tetraneura pallida Haliday. 
Tetraneura rubra Lichtenstein. 
Tetraneura ulmi Linnaeus. 
Ulinus “effusa”. 
Colopha compressa Koch. 
Schizoneura ulmi Linnaeus. 
Tetraneura ulmi Linnaeus. 
Ulmus fulva. 
Pemphigus ulmi-fusus Walsh & Riley. 
Ulmus montana. 
Tetraneura ulmi Linnaeus. 
Tetraneura ulmisaccuU Patch. 
Ulmus racemosa. 
Callipterus bellus Walsh. 
Colopha ulmicola Fitch. 
Myzocallis quercifolii Thomas. 
Ulmus tuberosa. 
Tetraneura pallida Haliday. 
‘ ‘Umbellif erae’ ’. 
Acyrthosiphon navozoi Mordwilko. 
Umbellularia califomica. 
Hyadaphis umbellulariae Davidson. 
Urospermum dalecliampii. 
Macrosiphum hieracii Schrank. 
Urospermum picroides. 
Macrosiphum hieracii Schrank. 
Urtica sp. 
Aphis lamii Koch. 
Aphis urticae Linnaeus. 
