Neoempheria dilatata Sueyoshi, 2014, sp. n.

Neoempheria dilatata sp. n.

[Japanese name: fukura-nagamado-kinoko-bae] (Figs. 2 h, 3h, 5, 15a–e)

Neoempheria ferruginea: Okada 1938: 137.

Description. Body length: 4.7 mm (4.4–5.1 mm, n= 5) in male, 4.5 mm (3.8–5.4 mm, n= 7). Wing length: 4.5 mm (3.8–5.0 mm, n= 10) in male, 4.7 mm (3.8–6.2 mm, n= 9) in female. Wing (Fig. 3 h): vein sc-r ending basal 1/4 of anterior margin of cell r1. Vein Rs longer than distance between basal end of vein Rs and apical end of vein sc-r. Male: genitalia yellow in ground color, gonocoxal projection dark brown, apex of gonocoxal lobe brown to black, surrounding parts brown, basal portion of aedeagus yellow to dark brown. S9 narrow, less than 1/10 as wide as long, visible as seam between gonocoxites 9, without sternal projections. Gonocoxite (Fig. 15 a, b: gc) with gonocoxal lobe round (Fig. 15 a: gl) or angled at outer apical margin. Gonostylus (Fig. 15 a: gs) slender, apical 1/4 less than 1.5 times as wide as base. Aedeagus (Fig. 15 a, b) dilated at apical half, without projections. Sclerotized part of aedeagus (Fig. 15 a: sa) tapered to apex, with slender, angled lateral extension. Female: S7 with uniform setae on posterior margin, posterior margin with deep incision at middle. S8 triangular in ventral view. Gonocoxite 8 (Fig. 15 c: gc8) small, recognizable as bump at sublateral portion in posterior margin of S8. Gonapophysis 8 (Fig. 15 c: gp8) dilated in apical half, with acute apex. Gonocoxite 9 (Fig. 15 d, e: gc9) yellow, without projections. Gonapophysis 9 (Fig. 15 d, e: gp9) dark brown to black, with a single ventromedial ridge (Fig. 15 d: vr), gradually tapered to apex with gonopore.

Specimens examined. Holotype. Male. “KU-352” [underside: KU-352], “Manchoukuo/ I. Okada” [underside: “ 9/IX-1937 / Andon [written in Chinese character], “ Neoempheria / ferruginea / (Brunetti)/ det. I. Okada”, “RV-4”, green disk label, “Ne.2012” (HUM). Paratypes. CHINA [LIAONING] same data as holotype (6♂, 3♀: Ne. 2006–2011, 2016–2018; HUM); Tieling, 5.ix.1937, I Okada leg. (5♂, 2♀: Ne. 2001–2005, 2013, 2014; HUM). JAPAN [KYUSHU] Kumamoto P: Mt. Tatsuta, Kumamoto C, 23.vii.1977, Z Kuranaga leg. (1♂, Ne.1009; FFPRI); same locality, 16.vii.2008, MS (1♂, 2♀: Ne.1006, 1007, 1042; BLKU); same locality, 29.vi.2006, MS (1♂: Ne.1008; BLKU). [RYUKYUS] Okinawa P: Sueyoshi Park, Naha C, 21.iii.2000, H Nakayama leg. (1♂: Ne.1011; BLKU); Yona, Kunigami V, 25.iii.2000, H Nakayama leg. (1♀: Ne.1012; BLKU).

Specimens collected in indoor facilities. JAPAN [HONSHU] Nara P: Yamato-kohriyama C, 8.ix.2011 (16♂, 10♀: Ne. 1707–1732). [RYUKYUS] Okinawa P: Higashi V, iii.2009 (2♂, 4♀: Ne. 1017–1021, 1041); Nago C, v.2012 (1♂, 1♀: Ne.1733, 1734). All specimens are deposited in FFPRI.

Etymology. The specific epithet is derived from Latin and refers to the gonocoxal lobe, which is dilated (dilatatus) ventrally (Fig. 15 a).

Distribution. China (Liaoning) and Japan (Honshu, Kyushu, and Ryukyus) (Fig. 5).

Remarks. This species is distinguished from other species similar in general appearances by a combination of the following characters: in the male the gonocoxal lobe is dilated at apex; and sternite 9 is narrow and without any sternal projections, and in the female by the acute apex of the gonapophysis 8 (Fig. 15 c) and dark brown or black gonapophysis 9 with a single ventromedial ridge (Fig 15 e). Coloration and shape of the apex of the gonocoxal lobe is variable among the specimens from different localities. The 9th gonapophysis of the females are stable in the coloration and shape among different localities. I consider that the differences we can recognize in the shape and coloration of the gonocoxal lobe are quantitative and continuous among the localities. The male (Ne.1009) was collected at a light trap.