Cryptophyra lundbecki n. gen. et n. sp., is described from both sexes from Denmark. The genus is readily assigned to the ubfamily Muscinae, tribe Hydrotaeini. Character-states of diagnostic and phylogenetic importance are discussed. In conclusion, it is suggested that morphological evidence points to affinities with Megophyra Emden, Hydrotaea Rob.-Desv. or a more extensive Hydrotaea-group.