Lasioglossum (Sphecodogastra) nipponense (Hirashima, 1953)

Figs 4D, 5D

Halictus nipponensis Hirashima 1953: 134 [Holotype: ELKU; ♀, type locality = Omogo valley, Ehime Pref., Japan, examined]. Lasioglossum (Evylaeus) nipponense: Ebmer 1995: 534, Figs 4–5, 59–60 (♂); Ebmer 1996: 279; Murao & Tadauchi 2007: 198, 242 (in key), 244 (in key), Figs 21–23, 56F, 58F (♀♂).

Evylaeus (Evylaeus) nipponensis: Pesenko 2007b: 83 (in key), 89 (in key), 103, Figs 21–22 (♂).

Diagnosis. This species is similar to L. suisharyonense (Strand) from Taiwan. It is separated from L. suisharyonense by the female head longer than wide (length/width ratio 1.07–1.09, value cited from Murao & Tadauchi 2007), the male F2–F8 yellowish brown ventrally, and male mesoscutum reticulate-punctate nearly over entire surface. In contrast, L. suisharyonense has female head nearly as long as wide (length/width ratio 1.0–1.03, n = 3), male flagellum black ventrally, and PP on posterior area of male mesoscutum sparser than around area (IS = 4 d in maximum on posterior area).

Specimens examined. (n = 11) [South Korea] GW: 1♀, Mt. Gariwang-san, Jeongseon-gun, 30. vii. 2013 (R. Murao, cMur) ; 1♀, Mt. Gariwang-san, Jeongseon-gun, alt. 1100 m, N37°27’15’’, E128°1’10’’, 10. vi. 2013 (O. Tadauchi, ELKU) ; 1♀, Mt. Odae-san, alt. 900 m, N37°47’0’’, E128°32’19’’, 9. vi. 2013 (O. Tadauchi, ELKU) ; 1♀, Gamjong-ri, Dong-myon, Chunchon-gun, 21. v. 1992 (O. Tadauchi, ELKU) . JJ: Yonsil, Mt. Halla-san, 3♀ 1♂, 24. vii. 1990 (O. Tadauchi, ELKU) , 1♀2♂, 27. vii. 1990 (O. Tadauchi, ELKU).

Distribution. South Korea, Russian Far East, Japan.

Flight period in South Korea. Female: May to July. Male: July.

Flower records in South Korea. Brassicaceae: Sisymbrium luteum . Caprifoliaceae: Lonicera sp. Rosaceae: Neillia incisa .