Genus Mesostenus Gravenhorst, 1829

Mesostenus Gravenhorst, 1829b: 750 . Type species: Mesostenus transfuga Gravenhorst, 1829 . Designated by Westwood (1840).

Stenaraeus Thomson, 1896: 2380 . Type species: Mesostenus transfuga Gravenhorst, 1829 . Designated by Viereck (1914).

Umlima Cameron, 1902b: 208 . Type species: Umlima penetralis Cameron, 1902 . Monobasic.

Derocentrus Cushman, 1919: 113 . Type species: Coleocentrus texanus Ashmead, 1890 (= Mesostenus longicaudis Cresson, 1872). Original designation.

In Japan, two species, M. funebris Gravenhorst, 1829, and M. obtusus Momoi, 1966, have been recorded. I recognize a new distribution record of the latter species and record its data below.