Adelphomyia acicularis subsp. bidens Savchenko 1983

Adelphomyia acicularis bidens Savchenko, 1983 Figs 4–8 Adelphomyia acicularis bidens Savchenko, 1983: 53. Examined material. (Fig. 47) North Korea • 2 ♂ (pinned); Ompo; alt. 122 m; 29 May 1938; A. M. Yankovsky leg.; USNM • 3 ♂ (pinned); Seren Mts.; alt. 1067 m; 22 June 1938; A. M. Yankovsky leg.; USNM; South Korea • 1 ♂ (in ethanol); Gangwon-do, Pyeongchang-gun, Daegwallyeong-myeon, Yongsan-ri, Mt. Balwangsan; 19 July 2008; J. D. Yeo, M. J. Jeon and K. G. Kim leg.; Malaise trap; NIBR • 1 ♀ (in ethanol); Gangwon-do, Jeongseon-gun, Imgye-myeon, Dojeon-ri; 37.53583°N, 128.90278°E; alt. 762 m; 24 May – 23 June 2011; H. - W. Byun et al. leg.; Malaise trap; NIBR • 1 ♂ (in ethanol); Gyeongsangnam-do, Hadong-gun, Hwagae-myeon, Beomwang-ri; 35.27360°N, 127.61121°E; alt. 369 m; 8 May 2013 (2); S. Podenas leg.; NIBR • 1 ♂ (in ethanol); Jeollanam-do, Gurye-gun, Toji-myeon, Naedong-ri; 35.26580°N, 127.58128°E; alt. 378 m; 10 May 2013; S. Podenas leg.; NIBR • 1 ♂ (in ethanol); Jeollanam-do, Gurye-gun, Toji-myeon, Naedong-ri; 35.26580°N, 127.58128°E; alt. 378 m; 11 May 2013; S. Podenas leg.; at light; NIBR • 1 ♂ (pinned); Jeollanam-do, Gurye-gun, Toji-myeon, Naeseo-ri, Piagol valley; 35.25825°N, 127.58208°E; alt. 310 m; 26 April 2015 (2); S. Podenas leg.; NIBR • 2 ♂ (in ethanol); Jeollanam-do, Gurye-gun, Toji-myeon, Naeseo-ri, Jirisan National Park, Piagol valley; 35.27448°N, 127.56378°E; alt. 593 m; 1 May 2015 (1); S. Podenas leg.; at light; NIBR • 1 ♂ (pinned); Jeollanam-do, Gurye-gun, Toji-myeon, Naeseo-ri, Jirisan National Park, Piagol valley; 35.27177°N, 127.57146°E; alt. 490 m; 2 May 2015 (1); S. Podenas leg.; NIBR • 2 ♂ (in ethanol); Jeollanam-do, Gurye-gun, Toji-myeon, Naeseo-ri, Jirisan National Park, Piagol valley; 35.25825°N, 127.58208°E; alt. 310 m; 2 May 2015 (2); S. Podenas leg.; NIBR • 1 ♂ (pinned); Jeollanam-do, Gurye-gun, Toji-myeon, Naeseo-ri, Jirisan National Park, Piagol valley; 35.26590°N, 127.58096°E; alt. 446 m; 2 May 2015 (4); S. Podenas leg.; at light; NIBR • 2 ♂ (in ethanol); Jeollanam-do, Gurye-gun, Toji-myeon, Naeseo-ri, Jirisan National Park, Piagol valley; 35.26590°N, 127.58096°E; alt. 446 m; 3 May 2015 (3); S. Podenas leg.; at light; NIBR • 1 ♂ (in ethanol); Jeollanam-do, Gurye-gun, Toji-myeon, Naeseo-ri, Jirisan National Park, Piagol valley; 35.26590°N, 127.58096°E; alt. 446 m; 27 June 2015 (2); S. Podenas leg.; at light; NIBR • 2 ♂ (in ethanol); Gyeonggi-do, Yangpyeong, Cheongun-myeon, Dowon-ri; 37.54507°N, 127.79483°E; alt. 224 m; 28 May 2017; S. Podenas leg.; at light; NIBR. Redescription. General body colouration brown to dark brown densely covered with grey pruinosity. Body length of male 5.6–8.4 mm, of female 8.0 mm. Wing length of male 6.3–8.7 mm, of female 8.4 mm. Head. Dark brown, dusted with grey, pale grey pruinose frontally and along eye margin. Eyes widely separated in both sexes, distance between them at base of antennae exceeds length of scape. Antenna (Fig. 4) 1.7–2.8 mm long in male, 1.7 mm in female, extending beyond wing base if bent backward. Scape greyish brown, elongate, nearly cylindrical, 2 × as long as pedicel, pedicel pear-shaped. Flagellum yellow basally, slightly darkened distally. Flagellomeres elongate, longest at middle, apical flagellomere slightly smaller than penultimate. Verticils brownish, longest verticils ~ 1.5 × as long as respective segments. Rostrum dark brown dusted with grey, palpus and labellum dark brown. Thorax. Cervical sclerites brown to dark brown. Pronotum pale brown to dark brown, depending on specimen, covered with sparse erect long yellowish setae dorsally. Presutural scutum brown, dusted with grey, without stripes or with indistinct darker median stripes on the anterior half. Tubercular pit small, polished-brown at frontal margin of sclerite, prescutal pit distinct, polished-brown, surrounded by grey area. Scutal lobe and scutellum brown, dusted with grey, area between scutal lobes pale brown, mediotergite brown, dusted with grey along middle, yellowish brown laterally. Pleuron uniformly brown, densely covered with brown pruinosity. Wing (Fig. 5) brownish. Stigma elongate, from pale brown to brown. Cross-veins and branching points of veins narrowly surrounded by indistinct darker areas in some specimens, in other specimens darker areas missing. Veins brownish, yellowish at wing base. Macrotrichiae more abundant in radial cells and cell m 1, also present in other marginal cells along postero-apical wing margin, few macrotrichiae present also in cell cua at wing margin. Venation: Sc long, reaching slightly before branching point of Rs, sc-r less than its own length from tip of Sc. Rs long, slightly arched at base. Free end of R 1 longitudinal, R 2 transverse, indistinct, 3 × its own length from tip of R 1, R 3, and R 4 slightly diverging towards wing margin, cell r 3 with short stem. Cross-vein r-m distinct, at base of discal cell. Discal cell slightly more than 2 × as long as wide. Cross-vein m-cu slightly before middle of discal cell. Anal vein slightly arched at apex, reaching wing margin at the level of Rs base. Anal angle widely rounded. Length of male halter 1.0– 1.5 mm, of female 1.2 mm. Halter pale yellowish, knob slightly infuscate. Coxae yellow, only fore coxa brownish at base. Trochanters pale yellow. Femora yellow with indistinctly darkened apices, tibiae yellow with darker distal ends. Basal tarsomeres pale brown, remaining tarsomeres dark brown. Male femur I: 4.1–5.2 mm long, II: 4.0– 5.4 mm, III: 4.5–6.0 mm, tibia I: 5.3–6.5 mm, II: 4.8–5.9 mm, III: 6.0– 6.5 mm, tarsus I: 5.1–6.2 mm, II: 5.0– 5.6 mm, III: 4.6–5.0 mm. Female femur II: 4.7 mm long, tibia II: 4.7 mm, tarsus II: 4.3 mm. Claw simple, without spines. Abdomen. Tergites brown, dusted with grey, sternites yellowish brown, paler at base of abdomen. Male terminalia (Fig. 6) yellow. Ninth tergite with two diverging triangle-shaped lobes at the middle of posterior margin and wide V-shaped indentation between them. Gonocoxite elongate, wider at base, narrower beyond middle, without additional lobe. Outer gonostylus with long, narrow, slightly arched outer branch that has few transverse ridges on basal half and small triangle-shaped lobe at base. Outer branch with sclerotised distal part and blackened apex, two small apical hook-shaped teeth curved medially. Inner gonostylus large, fleshy, setose, two-branched. Outer branch long, narrow, inner branch short, very narrow, reaching to ~ 1 / 3 of outer branch. Aedeagus (Fig. 7) strongly curved ventrally at ~ 2 / 3 length, distal part at ~ 90 0 angle to basal part (clearly visible in lateral view). Paramere darkened, posteriorly long, narrow, rod-shaped, nearly as long as aedeagus, strongly curved at ~ 1 / 6 length; basal part extends parallel to main body axis, distal part directed exactly downwards. Interbase nearly oblong with tip rounded. Ovipositor (Fig. 8) brownish yellow. Cercus long, narrow, apical part slightly raised upwards, apex obtuse. Hypogynial valve long, straight, wide at base, apical part distinctly narrower, apex reaching beyond middle of cercus, dorsal margin at ~ 1 / 3 length from tip with long straight setae. Elevation range. From 100 m to 1100 m. Period of activity. From end of April through middle of July. Habitat. Slopes to small mountainous streams densely covered with deciduous trees and shrubs, moss tufts on rocks. Species is attracted to light. General distribution. The nominotypical subspecies is known only from Shikoku island, Japan, subspecies A. acicularis bidens only from southern part of the Far East of Russia. Species and subspecies recorded from the Korean Peninsula for the first time.