THE LYGUS BUGS (GENUS LYGUS HAHN) OF NORTH AMERICA (HETEROPTERA: MIRIDAE)

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Abstract
The genus Lygus Hahn is revised for North America. The new synonyms (to the left of the equal sign) are: ceanothi var. deliticus Knight = humeralis Knight; convexicollis var. coloratus Knight and dolichorhynchus Stanger = convexicollis Reuter; nigritus Knight = ravus Stanger; brindleyi and fultoni Knight = robustus (Uhler); superiorensis Knight = columbiensis Knight; frisoni Knight = rubroclarus Knight; nigrosignatus Knight = elisus Van Duzee; ultranubilus Knight and epelys Hussey = nubilus Van Duzee; and nubilosus Knight and usingeri Stanger = nubilatus Knight. The 34 species known to occur in North America are: abroniae Van Duzee, aeratus Knight, atriflavus Knight, atritibialis Knight, borealis (Kelton), bradleyi Knight, ceanothi Knight, columbiensis Knight, convexicollis Reuter, desertinus Knight, elisus Van Duzee, hesperus Knight, humeralis Knight, lineolaris (Palisot de Beauvois), mexicanus Kelton, nigropallidus Knight, nubilatus Knight, nubilus Van Duzee, oregonae Knight, perplexus Stanger, plagiatus (Uhler), potentillae Kelton, ravus Stanger, robustus (Uhler), rolfsi Knight, rubroclarus Knight, rubrosignatus Knight, rufidorsus (Kelton), shulli Knight, solidaginis (Kelton), striatus Knight, unctuosus (Kelton), vanduzeei Knight, and varius Knight.Species are redescribed, seasonal variations in size and colour are discussed, and distribution maps and host plants are included. The adult males are illustrated and a key for their identification is given.