Megaselia jenshjerrildi n. sp.,

(Figs 108–120)

Diagnosis. In the keys of Lundbeck (1922) it runs to Group IV couplets 36, or 45 lead 2 or 46 lead 2, but the hypopygia are all different. In the key to the males of the British species (Disney, 1989) it runs to couplet 62, where likewise the hypopygia are different. In the key of Schmitz & Beyer (1965) for Abteilung IV Zweite Reihe it runs to couplet 20, where hypopygia differ, especially in having a long bristle as well as hairs on each side of the epandrium. In Borgmeier’s (1964) key to Nearctic Group IV it runs to couplet 17 lead 1 M. difficilis (Malloch) but it’s hypopygium and hind femur are different.

Description. Male. Frons as Fig. 108, with microtrichia restricted to margins. Cheek with 5 bristles and jowl with 2 that are much longer and more robust. Postpedicels, without SPS vesicles (Fig. 110), palps and proboscis as Fig. 109, the labella with numerous short spinules below (Fig. 111). Thorax brown with 3 notopleural bristles and no cleft in front of these, and mesopleuron with hairs (Fig. 112). Scutellum (Fig. 113) with an anterior pair of small hairs and a posterior pair of bristles. Abdomen as Fig. 114, the venter with a few small hairs on segments 3–5 but several long hairs on 6. Hypopygium as Figs 115 & 116. Legs brown to yellowish brown. Fore tarsus (Fig. 117) with posterodorsal hair palisades on segments 1–4 and 5 dilated and broader than 4. Dorsal hair palisade of mid tibia extends about 0.64 times its length. Hind femur (Fig. 118) with blunt spines in basal third (Fig. 119)marginally shorter than hairs of anteroventral row of outer half. Hind tibia with about 20 moderately differentiated posterodorsal hairs, without anterodorsals, and spinules of apical combs simple. Wings (Fig. 120) 2.3 mm long. Costal index 0.49. Costal ratios 3.5: 2.1: 1. Costal cilia (of section 3) 0.15 mm long. Vein 3 hair 0.05 mm long. 6 axillary bristles, the outermost being 0.18 mm long. Sc not reaching R1. Haltere knob yellow (Fig. 114).

Type material. Holotype male, DENMARK, DK, EJ, Onsild Mose, 21.V.–5.VI.2017, Esben Bøggild (UCMZ — 9–19).

Etymology. Named after Jens Hjerrild, who works for the Government’s Nature Agency and suggested valuable sites for Esben’s malaise traps.