Lycogaster flavonigrata Chen, van Achterberg & He

Holotype, female, length of body 13.4 mm (of fore wing 10.1 mm). Head. Antenna with 23 segments, segments after third segment distinctly widened and after 14th segments becoming gradually slenderer (Fig. 124); frons coarsely and rather densely punctate and vertex spaced punctate (interspaces often much wider than width of punctures) and shiny (Figs 120, 121), with short greyish setae; head subparallel-sided behind eyes, distinctly narrowed posteriorly and 1.3 times wider than mesoscutum (Fig. 121); dorsal length of eye 0.9 times length of temple (Fig. 121); temple smooth, shiny and with medium-sized whitish setae; occipital carina narrow lamelliform medio-dorsally and without crenula; supra-antennal elevations hardly developed as a thin rim and smooth; clypeus weakly emarginate and comparatively thin medio-ventrally. Mesosoma. Length of mesosoma 1.3 times its height (Fig. 126); mesopleuron below transverse mesopleural groove densely rugose anteriorly and spaced punctate and weakly shiny posteriorly, above groove similar but rugae finer posteriorly denser punctate; transverse mesopleural groove narrow, deep and moderately crenulate; notauli narrow anteriorly, widened posteriorly and coarsely crenulate; middle lobe of mesoscutum coarsely vermiculate rugose and weakly shiny (Fig. 126), its lateral lobes mainly coarsely punctate and medially with smooth interspaces; scutellar sulcus wide, both medially and laterally and coarsely crenulate; scutellum largely smooth (except some punctures), distinctly shiny, rather flat and anteriorly near level of mesoscutum; metanotum flat, shiny and smooth medially (Fig. 126); propodeum largely densely finely rugose and carina of foramen thick and arched (Fig. 126); foramen medially 0.6 times higher than wide basally. Wings. Fore wing: length of vein 1-M 2.3 times as long as vein 1-SR (Fig. 125). Metasoma. First tergite 0.4 times as long as apically wide, gradually narrowed basally, flattened medially and weakly convex apically; second–fifth tergites largely densely coarsely punctate and rather moderately shiny; second sternite similarly sculptured as tergite, its medio-apical protuberance lamelliform and convex medio-apically (Fig. 129) and with pair of triangular submedial teeth, third sternite only with distinct ledge (Fig. 129); hypopygium truncate apically. Colour. Black (including mandible); palpi, fore tibia and tarsus, tegulae, pterostigma and veins dark brown; apex of middle trochantellus, hind trochanter and trochantellus, and narrowly base of hind femur ivory; pair of large lateral patches on second and third tergites and apically on second sternite yellow; fore wing largely dark brown but paler subbasally (Fig. 125). Variation. Length of body 11.5–13.1 mm, of fore wing 8.9–10.0 mm; length of vein 1-M 1.9–2.1 times as long as vein 1-SR; outer side of fore tibia ivory; vein m-cu of fore wing subinterstitial or postfurcal by 0.2 times length of vein m-cu; third tergite with a pair of small to medium-sized yellow or ivory patches laterally. Male. Unknown.

China (Fujian, Jiangxi, Yunnan).