Gymnophora arcuata (Meigen)

Material. Male, Norway, Vestfold, Horten, 59.3655º N, 10.4604º E, 18 Jul 2018, J. Svetlik & I. Borja (12, University Museum of Bergen) .

Note. In the key to the species of the European Gymnophora Macquart (Disney 2017) G. perpropinqua Mostovski & Michaelovskaya should have been grouped with G. arcuata (Meigen) as its notopleural ridge is pale.

(Figs 1–11)

The female was previously unknown. It is described below.

Female. Frons as Fig. 1. Postpedicels as Fig. 2. Palps as Fig. 3. Notopleuron as Fig. 4. Dorsal view of abdomen as Fig. 5. Tergite 7 as Fig. 6. Sternites 7 and 8 as Fig. 7. Furca as Fig. 8. Front tarsus as Fig. 9. Hind femur and tibia as Fig. 10. Basal section of wing as Fig. 11. Wing length 2.48 mm. Costal index 0.47. Costal ratios 5.11: 1.01: 1. Haltere knob pale grayish white.

Diagnosis (female). The single lobe (Fig. 7), instead of the paired lobes of most species, at the rear of sternum 8 resembles G. forresteri Disney and G. quartomollis Schmitz, but the tergites 7 (Fig. 6) and sternite 7 (Fig. 7) differ from both these species.

Material. Male, Norway, Vestfold, Horten, Lat. 59.3654, Lon. 10.4611, 11 Jul 2017, K. H. Thunes & S. Skätøy, (1, UCMZ, 39–93). Female, Sogn & Fjord: Stryn, 61.8605ºN, 6.3404ºE, 15 Jul 2018, J. Svetlik & L. Børjia (11, UCMZ, 39–93) .