Subgenus Dicolus Förster, 1869

Dicolus Förster, 1869: 171 . Type species: Dicolus insectator Förster, 1871 (= Megastylus impressor Schiødte, 1838). Designated by Viereck (1914).

In this study, I newly record this subgenus from Japan based on three species, M. (Dicolus) excubitor (Förster, 1871), M. (D.) impressor Schiødte, 1838, and M. (D.) pectoralis (Förster, 1871) .