Hercostomus zhenzhuristi Smirnov & Negrobov, 1979

(Fig. 8 I)

Hercostomus zhenzhuristi Smirnov & Negrobov, 1979: 41 . Type-locality: Tokyo, Takago-san, Japan. Masunaga, 2014: 440. Phalacrosoma zhenzhuristi: Zhang et al., 2009: 139 .

Phalacrosoma sp. 1t. Tago, 2012: 11

Type material examined. HOLOTYPE Ƌ, Japan, Tsuruga, 06.viii.1938, Zhenzhurist (MSU) . PARATYPES: 3 Ƌ, 2 ♀, same data as holotype, 3 Ƌ, 3 ♀, Japan, Tokyo-San, 24.vii.1938 Zhenzhurist (MSU) .

Additional material examined. Japan. Saitama Pref.: 3 Ƌ, 1 ♀, Chichibu City, Ootaki, Kawamata, 27.viii.2011, leg. T. Tago ; 2 Ƌ, Chichibu City, Ootaki, Irikawa, 6.vii.2013, leg. T. Tago ; 2 ♀, Chichibu City, Terao, 13.vii.2014, leg. Tago ; 1 Ƌ, Chichibu City, Terao, 28.vi.2015, leg. T. Tago (OMNH).

Remarks. Zhang et al. (2009) transferred Hercostomus zhenzhuristi to the genus Phalacrosoma Becker, 1922, but Brooks (2005) suggested that Phalacrosoma should be a synonym of Hercostomus . We agree with this recommendation. Masunaga (2014) assigned this species to Hercostomus .