288 Wisconsin Academy of Sciences^ Arts^ and Letters. 
Plcea obovata. 
Chernies viridanus Cholodkovsky. 
Picea omorika. 
MyzapMs aMetina Walker. 
Picea orientalis. 
Chernies orientalis Dreyfus. 
Chermes pini Marquart. 
Chernies pini pineoides Cholodkovsky. 
Chermes siMricus Cholodkovsky. 
Chermes stroMloMus Kaltenbach. 
MyzapMs aMetina Walker. 
Picea pungens. 
Chermes cooleyi Gillette, 
Chernies montanus Gillette. 
Chermes similis Gillette. 
Chermes stroMloMus Kaltenbach. 
Lachnus farinosus Cholodkovsky. 
MyzapMs aMetina Walker. 
Picea rubra^ziP. nigra. 
Chermes consolidatus Patch. 
Chermes floccus Patch. 
Chermes pinifoliae Fitch. 
Chermes similis Gillette. 
MyzapMs aMetina Walker. 
Picea sitcheiisis. 
MyzapMs aMetina Walker. 
RhizoMus viridis Theobald. 
Plcridimi vulgare. 
MacrosipMim picridis Fabricius. 
Macrosiphum soncM Linnaeus. 
Picris sp. 
Aphis rumicis Linnaeus. 
Picris ecMoides. 
Aphis terricola Rondani. 
Rhopalosiphum lactucae Kaltenbach. 
Picris liieracioldes. 
Aphis terricola Rondani. 
Macrosiphum picridis Fabricius. 
Macrosiphum soncM Linnaeus. 
Rhopalosiphum lactucae Kaltenbach. 
