Systematic study of the genus Antocha recorded from Japan and its adjacent area [Diptera, Tipulidae]

Eighteen specics of the genus Antocha from Japan and its adjacent area are studied based on about 1 800 specimens. Holotypes o f all Japanese species including junior synonyms are included. Keys to subgenera and to specics are given with figures. A character matrix and intrageneric groups are also given. Antocha (Antocha) spicata A lexa n der , 1936 and A . (A.) brevinervis A lexander , 1936 (nec. A lexander , 1924) are synonymized under A. (A.) brevinervis ALEXANDER, 1924. Antocha (Antocha) subdentifera ALEXANDER, 1969 is synonymized under A. (A .) dentifera ALEXANDER, 1924. Females o f the following 4 species are recorded and described for the first time: Antocha (Proantocha) uyei, Antocha (Antocha) bidigitata, A . (A.) sagana, A. (A.) subconfluent a. Female o f A. (A.) gracillima is described for the first time.