Male. Head distinctly wider than thorax (at postpronotal lobes); interocular distance on vertex smaller than at ventral eye margin; vertex sharply depressed (nearly 90˚ angle on median eye margin); width of parafacial area (between tentorial pit and median eye margin) less than half the width of facial gibbosity (at same level); densely white pruinose, only ocellar triangle, vertex, and postgenae apruinose and dark brown; facial gibbosity distinct, discernible in lateral view, entirely covered with long, white mystacal setae; frons, vertex, and occiput with white setae; proboscis light brown, vestigial, knob-like; maxillary palpi laterally compressed, light brown, slightly longer than proboscis. Antennae brown; scape and pedicel with white setae dorsally and ventrally, scape longer than pedicel; postpedicel in proximal half cylindrical, distal half symmetrically bulbous, >2.0 times as long as combined length of scape and pedicel; apical ‘seta-like’ sensory element situated apically in cavity on postpedicel. Thorax. Light brown, predominantly white pruinose, only postpronotal lobes, proepisternum, anterior half of anepimeron, and posterior half of scutellum apruinose; scutum with faint dark grey longitudinal stripes just lateral of median line and laterally with presutural and postsutural spots. Setation. Distinct notopleural, supra-alar, and postalar macrosetae absent; white setae scattered on scutum, but not on faint dark grey spots/stripes, longest laterally dorsal to anepisternum; antepronotum, proepisternum, and postpronotal lobes with long white setae; katatergite and apruinose part of anepimeron with short white setae; scutellum, mesopostnotum, and anatergite asetose. Legs light brown to brown with white setae; pro and mes coxae apruinose, met coxae white pruinose; femora brown, met femora cylindrical as wide as pro and mes femora, met femora without ventral macrosetae; pro and mes tibiae laterally arched, met tibia straight, met tibia without ventral keel; pro and mes tarsomeres of equal length, met proximal tarsomere as long as combined length of 2nd and 3rd tarsomeres; pulvilli well-developed, as long as well-developed claws, much wider than base of claws. Wings. Length 11.2–11.4 mm; hyaline throughout, very few microtrichia scattered on wing, all veins light yellow, all marginal wing cells closed; C terminating at junction with R1; R4 either terminating in R2+3 or R1; R5 terminating in R1; stump vein (R3) present at base of R4; R4and R5(forming cell r4) more or less parallel medially; M1+2 terminating in R1; CuA1 and CuA2split proximally to m-cu (cell m3narrow proximally); alula very large, touching scutellum medially; haltere light yellow. Abdomen. Predominantly brown, T2 as wide as T1, T white pruinose, S predominantly apruinose, scattered white setae; T1–7 well-developed and visible; T2 with anterior apruinose stripe; T1–6 posterior margin yellow; bullae on T2 light brown and circular; S1 entirely yellow, S2–7 posterior margin yellow. Terminalia not studied in detail.
Female. Interocular distance on vertex nearly as wide as width of base of scutellum (nearly 3 times as wide as in male) width of parafacial area (between tentorial pit and median eye margin) more than half the width of facial gibbosity; head setation much shorter, only few mystacal setae; thoracic setation much shorter; pulvilli on all tarsi about half the length of claws, only as wide as base of claws; wing length 17.5–18.2 mm; abdominal pruinosity reduced, only T1 completely white pruinose, T2–3 (slightly on T4) only laterally pruinose, T5–8 entirely apruinose; tergites proximally brown in varying extent. Genitalia. Ovipositor with acanthophorite plates each with 7 spurs; internal structures not studied.
- Dikow, T. (2010): Order Diptera, Family Mydidae. Arthropod fauna of the UAE, 3: 608–615