Xenomyia osculata Pont & Werner, 2003

Xenomyia osculata Pont & Werner, 2003 View in CoL

Diagnosis. (modified from Pont & Werner 2003). ( Fig. 42 View FIGURES 42–45 reproduced from Pont & Werner 2003, with permission of the publisher, see Material and Methods); Figs 43–45 View FIGURES 42–45 , modified from Couri & Pont 2020). Length: 4.5–5.0 mm. Shape of head very distinct with small eye, arched frons, fronto-orbital plates enlarged, with margins touching and covered with dense small setulae ( Figs 12 and 13 View FIGURES 10–15 modified from Figs 1, 2 View FIGURES 1–3 and Fig. 42 View FIGURES 42–45 reproduced from Fig. 3 View FIGURES 1–3 of Pont & Werner 2003). Ocellar setae absent; antennal insertion not produced; arista very short, short pubescent; eye small with short sparse hairs; proboscis elongate, dark brown; palpus long and fine; facial ridges with few setulae near vibrissa. Mesonotum with acrostichal setulae in 2–3 rows before suture and 3–4 irregular rows behind suture, dorsocentrals 2:3; presutural intra-alar seta present; anepimeron bare; katepisternals 1+2, only the upper posterior seta strong; prosternum bare. Legs with fore femur with a spine-like row of 5–7 posteroventral setae ( Fig. 18 View FIGURES 16–20 , modified from Fig. 4 View FIGURES 4–9 of Pont & Werner 2003); fore tibia without submedian setae; hind tibia with 1 anterodorsal and 1 posterodorsal submedian seta; claws not enlarged. Wing completely covered with microtrichia, denser in apical area between R 4+5 and Costa, resembling a cloud ( Fig. 24 View FIGURES 21–26 , modified from Fig. 5 View FIGURES 4–9 of Pont & Werner 2003); calypter creamy-white, lower one projecting slightly beyond upper one; halter with the stalk creamy and the knob white. Sternite 5 and terminalia as in Figs 34–38 View FIGURES 33–38 (modified from Figs 6–10 View FIGURES 4–9 View FIGURES 10–15 of Pont & Werner 2003).

Female. Head very different from the male with broad frons; fronto-orbital plate broad, covered with small setulae and with 3–4 pairs of frontal setae; 2 pairs of orbital setae; eyes bare; arista longer and narrower. Wing smoky, but without the area with denser microtrichia. Ovipositor as in Fig. 41 View FIGURES 39–41 , modified from Fig. 11 View FIGURES 10–15 of Pont & Werner 2003.

Notes. Described from male and female from South Africa. According to Pont & Werner (2003), the species is known only from the middle Orange River , Northern Cape, and is a predator of black-flies. Holotype deposited in NMSA.