Monoblastus nigriventus Lee & Cha, 1993

(Figs 3, 7–11, 13)

Lee & Cha 1993: 20 (in key: “ M. nigriventris sp. nov. ”, nom. praeocc, non Strobl, 1901), 21 (in description: “ Monoblastus nigriventus sp. nov. ”; holotype ♂ (YNU), South Korea, GW, “Mt. T’aebaeksan, 13-V-1991, coll. J.Y. Cha”; 12 ♂ (paratypes), GG, Gwacheon-si, Makgye-dong, Mt. Chonggyesan, 25.IV.1984, coll. J.W. Lee). Lee & Cha 1996: 165.

Material examined. South Korea: 1 ♂ (holotype, YNU) GW, “Mt. T’aebaeksan, 13-V-1991, coll. J.Y. Cha ” ; 1 ♂ (paratype, ZIN) GG, Mt. Chonggyesan, 25.IV.1984, coll. J.W. Lee (ZIN).

Remarks. Monoblastus nigriventus is closely related to M. ermolenkoi Kasparyan, 1987 described from Russian Kuril Islands (Iturup I.), and may represent a geographical variation of the latter species. Both species can be easily distinguished from other East Palaearctic congeners by coarse and dense punctures on vertex and gena

(Figs 3, 7, 13), distinctly pectinate tarsal claws (Fig. 9), and obtuse apices of mandibular teeth (Figs 13, 14), but the last character is stronger in M. ermolenkoi (Fig. 14).