Cratyna (Cratyna) ambigua (Lengersdorf, 1934)

(Fig. 1)

Synonyms: Neosciara latiforceps Bukowski & Lengersdorf, 1936; Neosciara lignea Lengersdorf, 1941; Decembrina prima Frey, 1942 .

Literature: Peyerimhoffia ambigua Lengersdorf—Lengersdorf (1934): 55 . Decembrina prima Frey—Hippa et al. (1998): 12, Fig.11. Cratyna (Cratyna) ambigua (Lengersdorf) — Menzel & Mohrig (1998): 363.

Redescription. Male. Head: eye bridge 3–4 facets wide. Antenna rough and brown; 4th flagellomere (Fig. 1 E) 2.5–2.7X as long as wide, with distinct neck. Maxillary palpus (Fig. 1 D) three-segmented; basal segment with setaeand a patch of sensilla, sensillae long and curved; 2nd segment as long as 1st segment, 3rd segment about 1.0–1.2X as long as 2nd.

Thorax (Fig. 1 G): brown, with coarse and fine dark brown setae. Posterior pronotum with setae. Scutum with sparse dark setae. Katepisternum slightly wider than high. Wing (Fig. 1 C) brown; posterior veins and wing membrane without macrotrichia; stem of M as long as M-fork; x = 1.0–1.2X length of y, setae on half of y dorsally; stem of CuA = 1/ 3X length of x; vein R1 = 4/ 5X length of R; R4+5 with macrotrichia dorsally and apicoventrally; vein C = 3/ 4X length of w. Halter short stemmed and dark. Leg pale yellow; apex of foretibia with group of spinelike setae(Fig. 1 F); claws untoothed.

Abdomen: genitalia (Fig. 1 A) brown, about 2.8X wider than high, without basal lobe; with sparse, stout, setae ventrally; base of gonocoxite semi-circular. Gonostylus (Fig. 1 B) short and swollen, about 1.2X long as broad, with 2 pairs of evenly curved hyaline spines on medial inner side. Tegmen membranous, rounded and as high as wide, tegmen structures present (semi-circular aedeagal margin). Aedeagus short and slender.

Body length: 2.3–3.0 mm.

Female. Described by Lengersdorf (1941) as Neosciara lignea .

Material examined. KOREA: Gyeunggi-do, Namyangju-si, Choan-myeon, Sonchon-ri, Mt. Ungil, 99 m a.s.l., Malaise trap, 26.vi–16.vii.2009, leg. J. Lim (4♂).

Habitats. Adult specimens are usually collected in woodland and calcareous grassland habitats (Menzel et al. 2006).

Distribution. New to Korea. Previously recorded from Austria, Bulgaria, Czech Republic, Finland, France, Germany, Great Britain, Greece, Israel, Italy, Luxembourg, Slovakia, Spain, Sweden, Switzerland, Netherlands, Ukraine (Menzel et al. 2006; Camaño Portela et al. 2008; Heller & Menzel 2013).