326 Wisconsin Academy of Sciences, Arts, and Letters. 
Salix nigricans. 
Chaitophorus salicti Schrank. 
Pterocomma populea Kaltenbach. 
Salix pentandra. 
Pterocomma salicis Linnaeus. 
Salix purpurea. 
Aphis saliceti Kaltenbach. 
Chaitophorus salicivora Walker. 
Lachnus viminalis Boyer. 
Salix repens. 
Chaitophorus hypogeus Schouteden. 
Salix smithiana. 
Pterocomma smithiae Monell. 
Salix speciosa. 
Aphis spectaMlis Ferrari. 
Salix triandra. 
Chaitophorus vitellinae Schrank. 
Pterocomma salicis Linnaeus. 
Salix viminalis. 
Aphis longirostris Fabricius. 
Aphis saliceti Kaltenbach. 
Chaitophorus viminalis Monell. 
Lachnus viminalis Boyer. 
Pterocomma pilosa Buckton. 
Pterocomma populea Kaltenbach. 
Pterocomma salicis Linnaeus. 
Salsola kali. 
Aphis rufula Walker. 
Hyalopterus arundinis Fabricius. 
Rhopalosiphum persicae Sulzer. 
Salvia aethiopis. 
Aphis salviae Walker. 
Salvia ceratophylloides. 
Aphis salviae Walker. 
Rhopalosiphum elegans Ferrari. 
