Body length: 8.4–10.9 mm. Coloration and pruinescence: Head mainly black. Thickened portion of third aristomere brownish yellow. Palpus mainly yellow. Thorax mainly black; posterior 1/3–4/5 of scutellum reddish-yellow; scutum covered with grey pruinescence, presutural area with four dark vittae. Abdomen black, more or less reddish laterally on tergites 3 and 4; tergite 3 with a transverse band of whitish-grey pruinescence on anterior 1/3–3/4, tergite 4 pruinose on anterior 2/3–1/1, tergite 5 on anterior 1/2–1/1 (the remaining posterior surface is covered with brown-bronze pru inescence) (Fig. 13B–D). Head (Fig. 13A): Compound eye usually covered with scattered ommatrichia, about as long as combined diameter of one to four facets (visible under > 60 ￥ magnification on black background); more rarely compound eye bare. Second aristomere about 4.0–7.5 times as long as wide. Thickened part of third aristomere about 2.0–2.5 times as long as second aristomere. Postpedicel about seven to nine times as long as pedicel. Vertex at its narrowest point 0.9–1.1 times as wide as compound eye in dorsal view. Gena in profile about 0.20–0.25 times as high as compound eye. Lateral vertical seta not differentiated from pos tocular setae. Postocular setae fine, relatively long, slightly bent anteriorly. Prementum about 1.0–1.5 times as long as wide. Abdomen (Fig. 13B–D): Syntergite 1 + 2 with short and robust median marginal setae. Tergite 3 with one pair of median marginal setae about 0.8–0.9 times as long as corresponding tergite. Tergite 4 with a row of nine to 12 marginal setae. Tergite 5 with a row of marginal and discal setae. Male terminalia (Fig. 13E–G): Epandrium rela tively long and convex. Hypandrial arms long, not or slightly bent anteriorly. Basal 1/2 of cerci prominent in lateral view, distal 1/2 massive and strongly bent posteriorly (Fig. 13E). Posterior surface of distal 1/2 of cerci flat (Fig. 13F, G). Medial preapical tooth of cerci not developed. Distal 1/2 of surstylus, in lateral view, narrow and evenly curved posteriorly, slightly pointed apically (Fig. 13E); posterior surface of surstylus grooved (concave) (Fig. 13E–G). Basal 1/2 of surstylus wide.