A taxonomic revision of the 29 palaearctic species of the dorsalis-group is presented. For most taxa the following data are included: references, type-material, material examined, diagnostic notes, (brief) description, detailed drawings of male and female copulatory organs, biology and distribution; for some others reference is made to recent literature. Six new species are described ( cirrata, difficilis, gaganboi, koreana, pjotri and spicula), one is given new status (sachalina) and one species is new for the Palaearctic region (occipitalis). One new synonymy is proposed ( stejnegeri = scurra) taken out of synonymy (microcera). The taxonomic information is summarized in a checklist. and one name is