Hercostomus flaveolus Negrobov & Chalaya, 1987

(Fig. 8 G)

Hercostomus flaveolus Negrobov & Chalaya, 1987: 45 . Type-locality: Nakhimovka, Primorsky Krai, Russia. Hercostomus arcticus Yang, 1996: 235 . syn. nov.

Hercostomus sp. № 2t. Tago, 2010: 9.

Material examined. Japan. Gunma Pref.: 3 Ƌ, 1 ♀, Agatsumagun, Naganohara-machi, 12–14.viii.2008, leg. T. Tago (2 Ƌ, 1 ♀ OMNH, 1 Ƌ VSU) . Saitama Pref.: 1 Ƌ, Mameyakibachi, Ootaki, Chichibu City, 27.ix.2008, leg. Tago (OMNH) .

Remarks. This species, described from the Primorje, Russia, is recorded for the first time from Japan. Hercostomus arcticus from China should be regarded as a synonym of H. flaveolus .