Limonia juvenca Alexander, 1935

Podenas, Sigitas & Podeniene, Virginija, 2017, Limonia crane flies (Diptera: Limoniidae) of Korea, Zootaxa 4231 (1), pp. 1-37 : 13-14

Limonia juvenca Alexander, 1935

( Figs. 16–19 )

Limonia juvenca Alexander, 1935: 243 .

Examined material: Holotype, male (slide-mounted), Japan, Yumoto, Honshu , 5000’, VIII-5, ’34 [1934], Issiki ( USNM) ; 2 males, 3 females (in ethanol), South Korea, Gyeonggi-do, Gapyeong-gun, Buk-myeon, Hwaak-ri , N 37.99363, E 127.52102 and N 37.98402, E 127.52676, altitudes 579 m and 810 m, 2014.08.20, coll. S. Kim, S. Podenas ( NIBR) ; 1 male (in ethanol), South Korea, Gangwon-do, Hongcheon-gun, Nae-myeon , Yuljeon-ri , N 37.73849, E 128.34566, alt. 798 m, 2014.08.21 (1), coll. S. Kim, S. Podenas ( NIBR) ; 1 male (in ethanol), South Korea, Gangwon-do, Pyeongchang-gun, Jinbu-myeon , Jangjeon-ri , ( Moss valley ), N 37.47153, E 128.54305, alt. 769 m, 2014.08.22 (2), coll. S. Kim, S. Podenas ( NIBR) .

General body coloration from yellow of thorax to dark brown of abdomen. Male body length 6.1–6.6 mm, that of female 7.2–8.5 mm, wing length of male 5.4–5.8 mm, that of female 6.6–7.1 mm. Wing reaches to about tip of abdomen in both sexes.

Head. Dark brown to black. Male antenna 2.2–2.6 mm long, 14-segmented. Scape elongate, nearly cylindrical, dark brown. Pedicel short, oval, dark brown with yellowish distal margin. Antennal flagellum dark brown except pale base of first flagellomere; segments subcylindrical, covered with a dense whitish pubescence. Verticils 1.4 times as long as respective segments (original description says “short verticils”). Rostrum and palpus black.

Thorax. Cervical sclerite dark brown. Pronotum dark brown dorsally, obscure yellow laterally. Mesonotal prescutum yellow with brown median stripe, that gets split posteriorly on scutal lobes. Margins of scutal lobe yellow. Scutellum brownish with yellow median line, that gets narrower posteriorly. Mediotergite brownish. Pleuron yellow fronto-dorsally, turning pale postero-ventrally with brownish smear in central area. Wing ( Figs. 16, 17 ) brownish with distinct brown stigma and smoky areas in the middle of cell r, along cord and at wing apex. Darker area surround tip of Sc and base of Rs. Veins brown. Venation: Sc1 short, reaching just beyond base of Rs, Sc2 at base of Rs. Rs short, slightly arcuate. Basal deflection of CuA1 before branching point of M. Comparative wing length slightly varies, some males have reduced wings, reaching to the posterior margin of eigth abdominal segment. Halter 0.9–1.0 mm long in male, 0.9–1.2 mm in female, stem pale, knob brownish. Coxae pale, trochanters yellow. Femora brown with yellowish base.

Abdomen. Tergites brown to dark brown. Sternites yellow with brown posterior margins. Darkening gets wider towards distal end of abdomen. Eigth sternite entirely dark brown. Male genitalia ( Fig. 18 ) somewhat lighter than subgenital segment. Ninth tergum with shallow emargination at posterior margin. Gonocoxite with large setose ventromesal lobe. Gonostylus elongate, nearly parallel-sided, but very tip distinctly narrower and curved backwards, setose. Paramere wide at base, distal part long and slender with blackened apex. Penis comparatively long, setose, bifid at apex, tip sharply curved downwards. Ovipositor ( Fig. 19 ) light brown, base of cercus dark brown, dorsal and apical parts of hypovalva brown. Cercus long and straight, spine shaped.

Elevation range in Korea. 770 m – 810 m.

Period of activity. All specimens were collected during the second half of August.

Habitat. Dense deciduous groves on mountainous river slopes.

General distribution. Currently known from Japan, Honshu Island, Far East of Russia and recorded here from the Korean Peninsula for the first time.

Figures

FIGURES 16 – 19. Limonia juvenca. 16: wing; 17: wing, variation; 18: male genitalia, dorsal view; 19: ovipositor, lateral view.