A historical review of the -group is provided and three new species are described from China: Wang & Wu, , Wang & Zhang, and Wang & Zhao, . One species, Ringdahl, 1934, is recorded for the first time from China. Illustrations of male terminalia of these four species and a taxonomic key to the males of known species in the group are given. The -group now includes 30 species distributed in the Holarctic Region and northern part of the Oriental Region.
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