Myopa

1.b. Wing with black markings: cross vein at the basis of cel R blackened, that cross vein blackened with additional black patterning on other veins, cell R with black patch or wing with black and white patterning -> 7

2.a. Face: at the mouth edge left and right a thin black stripe; tergite 4 and 5 with silvergrey dusting, at the front border with two large, dark rectangular spots without dust, these spots well separated. 6-8 mm. NL, B, D. -> Myopa variegata Meigen

2.b. Face: mouth edge white, without black stripes; tergite 4 and 5 either without dust or largely dusted, if dusted than the dustless spots at the front edge semicircular and not well separated -> 3

3.a. Scutellum black; abdomen blackish with brown edges, for M. fasciata with yellowish dust -> 4

3.b. Scutellum reddish; abdomen reddish brown (like a broad Sicus). 11.5-15 mm. NL, B, D. -> Myopa dorsalis Fabricius


Myopa dorsalis.

4.a. Wing: anal cell long; face under eyes bare -> 5

4.b. Wing: anal cell short, as in Dalmannia; face under eyes haired. 3.5-4 mm. D. -> Myopa morio Meigen

5.a. Femora orange to brown, with or without dark patches, along underside without or only with weak black bristles; antennae: segment 2 1.5 times as long as segment 3 (measured on the outside); more red-brown species, but thorax and abdomen can be largely black above; snout shorter or longer than head -> 6

5.b. Femora black (sometimes paler at very tip), at the underside over the full length with many strong, short, black bristles; tibiae brown at base, black at tip half; antennae: segment 2 at most as long as segment 3 (measured on the outside), arista pale at base and black at tip half; thoracic dorsum uniformly black and weakly dusted without longitudinal lines of dust, contrasting with humeri which are densely silverish dusted; abdomen largely blackish with variable brown pattern at the sides and with silver dust on hind and side margins of tergites; snout shorter than height of head. Small species: 4-5 mm. Central and Southern Europe. -> Myopa occulta Wiedemann in Meigen

6.a. Frons: black pattern in V-form, leaving the frons next to the compound eyes pale; Femur 1 brown with a dark patch at the outside; antennae: arista pale at base and black at tip; tergite 2 with broad brown side margin; tergite 4-7 covered with dust over much of their surface, at tergite 4-5 often (but not always) with half round undusted spots at the front border; thoracic dorsum with two well defined longitudinal stripes of dust at the side margin and 2 stripes on the centre. 7-10 mm. NL, B, D. -> Myopa fasciata Meigen

6.b. Frons: black pattern in W-form, frons next to compound eyes dark; femur 1 brown without dark patch at the outside; antennae: arista uniformly pale; tergite 2 black, only brown at the very side margin; tergite 4-6 dusted over a small part of their surface, tergite 7 undusted; thoracic dorsum weakly dusted, without longitudinal stripes of dust. 5-8 mm (extrapolating the differences in thorax width of Stuke (2001) to body length) -> Myopa curtirostris Kröber

7.a. Cross vein at basis of cell R blackish -> 8

7.b. Cross vein at basis of cell R whitish; wing with a mix of white and black spots. 6-11 mm. NL, B, D. -> Myopa buccata Linnaeus

8.a. Wing: cell R without a black spot in the centre, but with black infuscations around some of its veins; snout shorter than M. picta -> 9

8.b. Wing: cell R with a black spot in the centre; snout very long. 8-11 mm. B, D. -> Myopa picta Panzer


Myopa picta, head (from Kröber)

9.a. Thoracic dorsum: black coloration extends all the way up to the base of the scutellum, at least medianly -> 10

9.b. Thoracic dorsum: black coloration does not extend to the base of the scutellum, thoracic dorsum brownish red just before the scutellum ->12

10.a. Cross vein at basis of cell R is the only clear black marking in the wing, sometimes accompanied by weaker dark infuscations around the veins of cell R; wing: basal cells without white to yellow patches -> 11

10.b. Wing: multiple, well marked black patches in the wing in addition to the black basis of cell R, basal cells with some white to yellow patches. 7-8 mm. NL, B, D. -> Myopa polystigma Rondani

11.a. Male: tergite 4 undusted or at most dusted medianly on the hind margin, not reaching front margin at the sides. Female: tergite 4 largely undusted, at most dusted in posterior half or less. Both: tergite 5: front margin undusted; wings often (but not necessarily) weakly infuscated along length veins. Abdomen dark orange to blood-red.  6-11 mm. NL, B, D. -> Myopa testacea Linnaeus

11.b. Males and females: tergite 4 dusted medianly from the posterior margin for at least half its length and dusting may reach front margin at the sides, tergite 5 medianly dusted for its whole length, often completely dusted; wings: hyaline of uniformly tinted not infuscated along length veins in addition to blackened base of cell R; Abdomen dark reddish brown. 4-6mm.  Myopa stigma Meigen

12.a. Abdomen: tergite 5 with long hairs, which are at least as long as the largest diameter of tibia 3, the long hairs at tergite 5 perpendicular on or with an angle of 45 degree to the surface -> 13

12.b. Abdomen: tergite 5 with short hairs, which are shorter than (at most some as long as) the largest diameter of tibia 3, at tergite 5 the hairs at an angle of 45 degree to the surface -> 14

13.a. Tibia 1 and 2: at the underside, at the basis with a row of appressed, black bristles, forming a black line on the pale surface, longest hairs on tibia 1 and 2 as long as the width of the tibia (at its widest point); tergite 5 densely haired, with hairs at an angle of 45 degree. 7-9 mm. NL, B. -> Myopa hirsuta Stuke (=Myopa strandi Collin)

13.b. Tibia 1 and 2: without a row of black appressed bristles (the only Myopa which lacks these hairs), longest hairs on these tibia much longer than the width of the tibia; tergite 5 with hairs at an angle of 90 degrees. 7-9 mm. NL, B, D. -> Myopa vicaria Walker

14.a. Palpae, at the basis of the snout, brown (contrasting with white mouth edge); snout: 3rd part shorter than 2nd part. 7-10 mm. NL, B, D. -> Myopa tesselatipennis Motchulsky

14.b. Palpae whitish (hardly contrasting with white mouth edge); snout 2nd and 3rd part equally long, each longer than tars 1. 8.5-10 mm. NL, B, D. -> Myopa pellucida Robineau-Desvoidy (=Myopa extricata Collin)