Megaselia munki n. sp.

(Figs 146–156)

Diagnosis. In the keys of Lundbeck (1922) it runs to Group IV couplet 5 lead 2 M. subnitida (Lundbeck), but its hypopygium is different (Figs 27–30 in Disney & Häggqvist, 2018). In the key to the males of the British Isles (Disney,1989) it runs to couplet 248, but neither option applies. In Borgmeier’s (1966) key to Nearctic Group VII it runs to couplet 12 M. minuta (Aldridh), a species widely recorded in the Palaearctic Region since Borgmeier’s key. However, its hypopygium is different and it has only 2 bristles on the notopleuron. It fails to key out in the rest of the world’s fauna.

Description. Male. Frons as Fig. 146, with dense but very fine microtrichia. Cheek with 2 bristles and jowl with 2 that are longer and more robust. Postpedicels, without SPS vesicles, and palps as Fig. 147. Proboscis as Figs 147 and 148, the labella with many small hairs below. Thorax as Figs 149 and 150, with 3 notopleural bristles and no cleft in front of these, mesopleuron bare and scutellum with an anterior pair of small hairs and a posterior pair of bristles. Abdominal tergites as Fig. 150, with T5 and T6 as Fig. 151. Venter gray, and with hairs on segments 3–6. Hypopygium as Figs 152 & 153, the epandrium having hairs at most as long as those on the cerci, protiger and those at rear of T6 and the hypandrium with a very short but broad lobe without microtrichia and the right lobe absent. The pale anal tube shorter than length of epandrium. Legs brown but not dark brown. Fore tarsus with posterodorsal hair palisade on segments 1–4 and 5 just longer than 4 (Fig. 154). Dorsal hair palisade of mid tibia extends about 0.67 times its length. Hairs below basal half of hind femur longer than those of anteroventral row of outer half (Fig. 155). Hind tibia with 14–16 weakly differentiated posterodorsal hairs, without anterodorsals, and spinules of apical combs simple. Wings (Fig. 156) 1.38 mm long. Costal index 0.41. Costal ratios 4: 1.5: 1. Costal cilia (of section 3) 0.09 mm long. Vein 3 hair 0.01 mm long. With 2 unequal axillary bristles (repesented by their sockets only in the holotype). Sc not reaching R1. Haltere knob pale (Fig. 150).

Type material. Holotype male, DENMARK, DK, EJ, Hevring Hede, 15.V–18.VI. 2006, Thorkild Munk (UCMZ —9–21).

Etymology. Named after the collector, Thorkild Munk.