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Checklist of the Psylloidea (Hemiptera) of the U. S. Pacific Northwest

Abstract. 
 Several members of the Psylloidea vector pathogens of agricultural crops in the Pacific Northwest (“PNW”) U.S. states of Idaho, Montana, Oregon and Washington. These crop-production concerns have renewed interest in the biodiversity of this superfamily in the region. We compiled a checklist of this group by examining published records and collections. This revealed 118 species of psyllids from 23 genera; 29 of these species had not been previously reported in the PNW. Our species list provides a useful starting point for entomologists investigating the ecology of emerging insect-transmitted plant pathogens in the region.