Neoempheria sakhalinensis Zaitzev 2001

Neoempheria sakhalinensis Zaitzev, 2001

[Japanese name: saharin-nagamado-kinoko-bae] (Figs. 2 l, 3l, 4a, 4e, 4f, 7, 18a–e)

Neoempheria sakhalinensis Zaitzev, 2001: 453.

Neoempheria ferruginea: Sasakawa & Tamu 1961: 69.

Description. Body length: 5.3 mm (4.7–5.8 mm, n= 10), 5.4 mm (4.9–6.0 mm, n= 6) in female. Wing length: 5.0 mm (4.5–5.5 mm, n= 10) in male, 5.0 mm (3.7–5.8 mm, n= 10) in female. Wing (Fig. 3 l): vein sc-r ending basal 1/ 4 of anterior margin of cell r1. Vein Rs as long as distance between basal end of vein Rs and apical end of vein sc-r. Male: genitalia yellow in ground color, with distinct dark marks on sternal projection of sternite 9 and surrounding parts, basal portion of aedeagus yellow. S9 (Fig. 18 a: S9) broad, wider than long, with pair of sternal projections (Fig. 18 a: sp) blunt at apex. Gonocoxite (Fig. 18 a, b: gc) without gonocoxal lobe. Gonostylus (Fig. 18 a, b: gs) short, apical half 2 times as wide as base. Aedeagus dilated at apical half, with pair of ventral projections (Fig. 18 a, c: vp). Sclerotized part of aedeagus (Fig. 18 a: sa) with 2 pairs of extensions, ventral pair supporting projection (Fig. 18 c: ve), dorsal pair extending to dorsolateral portion of aedeagus (Fig. 18 c: de). Female: S7 (Fig. 4 e, f: S7) with strong setae on posterior margin, posterior margin gently convex (Fig. 4 f). S8 (Fig. 4 f: S8) quadrate in ventral view. Gonocoxite 8 (Fig. 4 e, f: gc8) small, recognizable as bump at lateral corner in posterior margin of S8.

Gonapophysis 8 (Fig. 4 e, f: gp8) slender, with blunt apex. Gonocoxite 9 (Fig. 4 e, f: gc9) yellow to dark brown, without projections. Gonapophysis 9 (Fig. 4 e, f: gp9) black, with 2 ventral sublateral ridges (Fig. 18 e: vr), tapered to apex with gonopore. Depression between ventral sublateral ridges deeply convex.

Specimens examined. RUSSIA [SAKHALIN] r.Ortovka, Smirnykh, 9.viii.2002, K Uesugi leg. (4♂, 1♀: Ne. 2045–2047, 2050, 2051; HUM); Sokol, 30.vii.2002, K Uesugi leg. (1♂, 1♀: Ne.2048, 2049; HUM). JAPAN [HOKKAIDO] Akan Lake, Akan T, 30.vi.2000, K Uesugi leg. (1♀: Ne.2054; HUM); Sapporo C, 6.viii.1952, T Tomioka leg. (1♀: Ne.2053; HUM). [HONSHU] Aomori P: Mt. Osore, 3.viii.1979, K Ohara leg. (1♀: Ne.2029; HUM). Iwate P: Kami-iioka, Morioka C, 21.ix.2000, K Uesugi leg. (2♂: Ne.2030, 2031; HUM); same locality, 22.ix.2000, K Uesugi leg. (1♀: Ne.2032; HUM). Akita P: Tazawako Highland, 20.ix.2000, K Uesugi leg. (2♂, 1♀: Ne.2033, 2041, 2042; HUM); Mt. Hinoto, Chokai T, ix.2000, K Uesugi leg. (1♂, 1♀: Ne.2035, 2036; HUM). Yamagata P: Mt. Gassan, Tachikawa T, 19.ix.2010, MS (1♂: Ne.1013; BLKU). Fukushima P: Kameoka, Tadami T, 20.vi.2000, K Uesugi leg. (1♂: Ne.2034; HUM). Tochigi P: Kawamata Lake, Kuriyama C, 17.vi.2000, K Uesugi leg. (1♂: Ne.2037; HUM); Kurobe, Kuriyama C, 16.vi.2000, K Uesugi leg. (1♂, 1♀: Ne.2038, 2039; HUM). Ibaraki P: Mt. Agakuni, Tsukuba C, 28.viii.2011, MS (1♀: Ne.1193; FFPRI). Gifu P: Mt. Hakusan, Shirakawa V, 2.vii.2011, MS (1♀: Ne.1014; BLKU). Shiga P: Ishiyama-hiratsu, Otsu C, 16.vii.1972, T Kimura leg. (1 sex unknown and 1♀: Ne.3004, 3014; OMNH). Kyoto P: Ashiu, Nantan C, 11.ix.2011, MS (2♀: Ne.1702, 1703; FFPRI). Tottori P: Makihara, Daisen T, 3.viii.2001, K Uesugi leg. (1♂, 1♀: Ne.2024, 2025; HUM); same data, except 5.viii.2001 (1♂: Ne.2026; HUM). [TSUSHIMA] Nagasaki P: Izuhara, 21–31.vii.1959, collector unknown (1♀: Ne.3011; OMNH).

Distribution. Russia (Sakhalin) and Japan (Hokkaido, Honshu, and Tsushima) (Fig. 7).

Remarks. This species is new to Japan. It is distinguished from other species similar in general appearances by the sternal projection of the male sternite 9 with a blunt apex (Fig. 18 a), and in the female by the dark brown gonapophysis 9 with two distinct ventral sublateral ridges (Fig. 18 e). A female (Ne.3011) was referred to as N. ferruginea in Sasakawa & Tamu (1961). One male (Ne.2021) was reared from a larva found under rotting wood. It pupated on 16.vi.2004, and emerged on 18.vi.2004. The skin of the pupa was attached under the pinned specimen.