Kloosia Kruseman, Chernovskiia Sæther, Robackia Sæther, and Saetheria Jackson (Chironomidae: Chironominae) in Japan

Kloosia koreana Reiss, 1988 is recorded from Japan for the first time and redescribed. Japanese material of other little known genera within the Harnischia complex are reexamined and identified. Beckidia sp. is assigned to the genus Kloosia; Chernovskiia orbicus ( Townes, 1945) is reconfirmed based on the larvae; Robackia sp. is allotted to R. pilicauda ( S ther, 1977), and the presumed larva described for the first time; and Saetheria sp. is allotted to S. tylus ( Townes, 1945).