Megaselia anniduedahlae sp. n.

(Figs 1–10)

Material examined. Holotype male, DENMARK, Dk EJ, Nørre Onsild mose (= bog), 7–24.vi.2017, Esben Bøggild (CUMZ-8-183).

Description. Male. Frons brown as Fig. 1, with dense but very fine microtrichia. Cheek with 4 bristles and jowl with 1 that is longer. Postpedicels, which lack SPS vesicles, palps and proboscis as Fig. 2. Proboscis from below as Fig.3. Thorax brown. Three notopleural bristles and no cleft in front of these. Mesopleuron bare. Scutellum with an anterior pair of small hairs and a posterior pair of bristles. Abdominal tergites brown with numerous hairs that are longest at rear of T6 (Fig. 4). Venter brownish gray, and with hairs on segments 3–6. Hypopygium as Figs 4–5. Legs brown. Fore tarsus with posterodorsal hair palisade on segments 1–4 (Figs 6–7). Dorsal hair palisade of mid tibia extends about 0.79 times its length (Fig. 8). Hind femur as Fig. 9. Hind tibia with 15–16 differentiated posterodorsal hairs of which half are more robust and strongly differentiated, without anterodorsals, and spinules of apical combs simple. Wings (Fig. 10) 1.69 mm long. Costal index 0.50. Costal ratios 3.15: 2.40: 1. Costal cilia (of section 3) 0.08 mm long. No hair at base of vein 3. With 2 unequal axillary bristles, the outer being 0.11 mm long. Sc raching R1. Haltere brown.

Recognition. In the key of Lundbeck (1922) it runs to Group VI couplet 5 lead 2 M. merochaeta (Lundbeck), a synonym of M. prodroma (Lundbeck), which differs in having only 2 bristles on the notopleuron plus a notopleural cleft. In the key to the males of the British species (Disney, 1989) it runs to couplet 193 lead 1, which sends one back to couplet190, lead 1 M. flava (Fallén) but its hypopygium is very different. Etymology. Named after Anni Duedahl the owner of the type locality.