Body length= 7.1–9.6 mm.Head. Frons wider than ocellar tubercle (female) or narrower (male), profile rounded above antenna, pubescence absent, frontal vestiture glabrous or with minute setae, surface texture smooth; face shape broadly rounded, expansive, vestiture glabrous; gena with dark setae; parafacial glabrous; mouthparts elongate, projecting anteriorly, or sometimes relatively short; palpus brown-black, narrowly cylindrical; occiput glabrous, glossy black; antennal base raised (male) or flat, frons roughly level with eye in profile (female); antenna longer than head; scape yellow, length much shorter than flagellum, scape with short, black setae; flagellum black, base of flagellum with short, dark setae.Thorax. Scutum light grey to black, setal bases glossy black; scutellum overlain with dense, matt-black pubescence; pleuron black (male) or darker anteriorly with dark orange posteroventrally (female), overlain with sparse silver-grey pubescence; wing markings banded infuscate; haltere knob brown; coxae orange; femora orange or dark yellow; tibia orange; tarsi yellow orange, dark distally, fore-basitarsus white. Scutal chaetotaxy:np, 4;sa, 1;pa, 1;dc, 1–2;sc, 1.Abdomen. Segments 1–3 yellow or orange, remaining segments black, silver velutum absent; terminalia dark.