Boreolimnus, a new leafhopper genus from northern North America, with a review of Cribrus Oman (Hemiptera, Cicadellidae, Deltocephalinae).

The poorly known leafhopper species described as Deltocephalus (Laevicephalus) concinnus var. incisurus DeLong, 1926 previously had no accepted generic placement. It is here redescribed and placed in Boreolimnus gen. nov. in the tribe Paralimnini, as Boreolimnusincisurus (DeLong) comb. nov. Cribrusmicmac Hamilton, 1987 is a junior syn. nov. of B.incisurus. Due to historic confusion, the species currently placed in Cribrus Oman, 1949 were also reviewed. Cribrusconcinnus (Sanders & DeLong, 1917) is redescribed, and a lectotype is designated to clarify the application of the name. Deltocephalusplagus Ball & DeLong, 1926 and Laevicephalusshingwauki Beamer & Tuthill, 1934 are recognized as junior syn. nov. of C.concinnus, now the only recognized species in the genus.