11. Epyris yamatonis Terayama 1999

(Figs 106–123)

Epyris yamatonis Terayama 1999: 712, 3; 2006: 108, 3.

Material examined. Korea: 1 3, Yeungnam University, Dae-dong, Gyeongsan-si, GB, 3.VII.1987, J. Lee leg.; 1 3, Yeungnam University, Dae-dong, Gyeongsan-si, GB, 35°28'N, 128°45'E, 22.VIII.1988, J. Lee leg.; 1 3, Mt. Sudosan, Jeungsan-myeon, Kimcheon-si, GG, Pitfall trap, 300 m, 25.VIII.1990, K. Yamagishi leg.; 1 3, ditto, 1400 m, 22.VIII.1990, K. Yamagishi leg.; 1 3, Hancheongyo, Yecheon-gun, GB, 7.VII.1993, J. Lee leg.; 1 3, Mt. Yeongdeungsan, Ibam-myeon, Yeongyang-gun, GB, 36°36'N, 129°00'E, 18.VII.1997, J. Lee leg.; 1 3, Jaesin-myeon, Bonghwa-gun, GB, 21.VII.1997, J. Lee leg.; 1 3, Mt. Gyemyeongsan, Anlim-dong, Chungju-si, CB, 14.VIII.1997, J. Lee leg.; 2 3, Suwon Campus of Seoul National University, Seodun-dong, Kwonseon-gu, Suwon-si, GG, 17.VIII.2000, M. Choi leg.; 1 3, Is. Chisim, Jangseungpo-dong, Geoje-si, GN, 34°49'20"N, 128°45'02"E, 27.VIII.2008, J. Lim leg.; 1 Ƥ, Donggye-dong, Jeju-si, JJ, 30.VII–6.VIII.2005, MT, Ch. Shin leg.; 1Ƥ, Namsan-ri, Gakbuk-myeon, Cheongdo-gun, GB, 10–24.VIII.2008, 35°41'N, 128°35'23"E, MT, J. Lee leg.; 1 Ƥ, Somok-ri, Gyuam-myeon, Buyeo-gun, CN, 14–25.V.2005, MT, J. Lee leg.

Diagnosis (male). Body length ~ 3.9 mm (Fig. 106); LFW ~ 2.2 mm (Fig. 111). Mandible and antenna dark castaneous; legs castaneous except coxa, femora and basal two thirds of tibia dark castaneous. Head as long as wide. Vertex convex with rounded corners. Temple profile divergent anterad. Mandible with two apical teeth (Fig. 108). First five antennal segments in ratio of 2.3: 1.0: 1.5: 1.8: 1.9 in length; flagellomere 1 1.4 × as long as wide; flagellomere 11 2.8 × as long as wide (Fig. 109). Clypeus with rounded median lobe. Frons with sparse, large punctures (Fig. 107). Eye with short hairs; HE 1.2 × OOL; WF 2.1 × WOT. Frontal angle of ocellar triangle obtuse. Pronotal disc 0.6 × as long as wide. Scutellar pits subrectangular, each pit separated from each other by 0.5 × as its maximum diameter (Fig. 110). Propodeal disc 0.6 × as long as wide with strong three discal carinae and sublateral carinae (Fig. 112). Metacarpus absent; transverse-median vein convex posteriorly (Fig. 111). Basiparamere shorter than paramere; cuspis divided into two long lobes (Fig. 114).

Variation. Mandible of some specimens with castaneous apex; labial and maxillar palpi castaneous to dark castaneous; tibia pale to dark castaneous; TL 3.56–4.15 mm; LP 0.58–0.62 × WP; propodeal disc 0.55–0.61 × as long as wide; scutellar pit separated from each other by 0.48–0.54 × as its maximum diameter.

Diagnosis (female) (hitherto unknown). Body length ~ 4.7 mm (Fig. 116); LFW ~ 2.6 mm (Fig. 118). Mandible dark castaneous except apical half castaneous. Antenna dark castaneous. Legs dark castaneous except tibia and tarsi castaneous. Head 1.1 × as long as wide. Mandible with two teeth (Fig. 120). First five antennal segments in ratio of 4.2: 1.0: 1.0: 1.4: 1.3 in length, flagellomere 1 1.0 × as long as wide, flagellomere 11 2.3 × as long as wide (Fig. 117). Frons polished, punctuate moderately (Fig. 119). Eye with short hairs; HE 1.1 × OOL; WF 2.6 × WOT. Frontal angle of ocellar triangle obtuse. Pronotal disc 0.6 × as long as wide. Scutellar pit subrectangular, each pit separated from each other by narrow septum (Fig. 121). Propodeal disc 0.6 × as long as wide with three strong discal carinae and sublateral carinae (Fig. 123). Metacarpus absent; transverse-median vein convex posteriorly (Fig. 118).

Variation. Mandible of some specimens with black base; metasoma with distal black band; TL 4.2–5.1 mm; LP 0.56–0.70 × WP; propodeal disc 0.6–0.67 × as long as wide.

Distribution. Korea (GG, CB, CN, GB, GN, JJ), Japan (Honshu, Shikoku, Kyushu, Yaku-shima, South Ryukyu).

Remarks. The male and female are mophologically differ from each other by ratio of head, ratio of each antennal segment, but these characters are common sexual dimorphism in the genus Epyris . We found some regular morphological patterns of this unique species among the congeneric species. We regard the male and female as an opposite sexes of one species because they have such common characters as head and pronotal disc microreticulate with relatively shallow but big puctures, anterior margin with round angle, mandible with two teeth, fore wing without metacarpus, same sculpture and carinae on propodeal disc.