Subgenus Megastylus Schiødte, 1838

Megastylus Schiødte, 1838: 139 . Type species: Megastylus cruentator Schiødte, 1838 . Designated by Förster (1871).

Idioxenus Förster, 1869: 171 . Type species: Megastylus mediator Schiødte, 1838 (= M. cruentator Schiødte). Designated by Förster (1871).

Megalostylus Schulz, 1906: 94 . Emendation.

Letosha Cameron, 1909: 724 . Type species: Letosha longicoxis Cameron, 1909 . Monotypic.

Myriarthridea Viereck, 1914: 97 . Type species: Myriarthrus cingulator Förster, 1871 . Original designation.

Miomeroides Kiss, 1924: 113 . Type species: Miomeroides transsylvanicus Kiss, 1924 . Monotypic.

Two species, M. (M.) cruentator and M. (M.) orbitator, have been recorded in Japan (Dasch, 1992; Kasparyan et al., 2012). In this study, I record some distribution data of these species. In addition, M. (M.) kuslitzkii Humala, 2007 is also newly recorded from Japan.