Herina oscillans

Key to species of Herina oscillans group

The monotypic genus Ulidiopsis Hennig 1939 is poorly differentiated from Herina based on external characters alone; its type species, Ulidiopsis mirabilis Hennig 1939, superficially resembles (small narrow black otitines with 2 brown spots on the wing) species of the oscillans group. However, its male terminalia structure (Kameneva, in prep.) shows that it shares structures of the surstyli and hypandrium with Otites rather than Herina. To avoid mistaking it with members of the oscillans group, we also include U. mirabilis in the key below.

1 Wing without subbasal crossband: darkened area from costal cell reaching posteriorly at most radius sector............. 2

– Wing with subbasal crossband extended from costal cell to M vein............................................. 4

2 Apical spot not joined to costa in r2+3 cell; no brown spot around r- m. Face black. Flagellomere 1 elongate, 2.5 times as long as wide. Femora at least partly yellow. Male genitalia: surstyli short, with narrowed, ventro-mesally directed ventral lobe, and 4–5 smooth prensisetae at its base (Merz (1996): Fig. 35–37). Europe: from British Is. and France to Italy, Poland and Hungary; Greece and Cyprus........................................................... H. oscillans (Meigen)

– Apical spot aligned to costa in r2+3 cell; r- m with or without brown spot. Face yellow. Flagellomere 1 shorter, at most twice as long as wide. Femora black.............................................................................. 3

3 Eye round, as high as long. Clypeus very low, almost linear in profile. Palp very narrow. Discal crossband absent, crossveins r- m and dm-cu without dark borders. 2.25–3.6 mm. Prescutellar acrostichal setae lacking. Greece, Turkey.............................................................................................. [Ulidiopsis mirabilis Hennig]

– Eye oval, 1.5 times as high as long. Clypeus high, almost as high as width of flagellomere 1. Palp oval. Discal crossband vestigial: cell r1 posterior of pterostigma with brown spot, crossveins r- m and dm-cu dark bordered. 2.9–3.2 mm. Prescutellar acrostichal setae present. Central Europe, Italy and Romania...................................... H. parva (Loew)

4 Wing narrower (almost 3 times as long as wide) and longer, WL> 3.5 mm (4.0 mm). Apical spot not joined to costa in r2+3 cell. Discal crossband unbroken from pterostigma to vein M. Femora black. Male terminalia: surstyli short, with long finger-like mesally directed ventral lobe, and 2 large smooth prensisetae at its base. (Female unknown.). Switzerland..................................................................................................... H. merzi Kameneva

– Wing wider (at most 2.5 times as long as wide), and shorter, WL<3.5 mm (2.5–3.0). Apical spot aligned to costa in r2+3 and part of r4+5 cells. Discal crossband entire or broken. Femora entirely or partly yellow. Male terminalia: surstyli different, with ventral lobe directed ventrally or meso-ventrally.............................................................. 5

5 Apical spot very large, subrectangular, extending from proximal half of r1 cell into apex of m cell. Discal crossband usually broken (see Merz (1996): Fig. 19). Male terminalia: surstylus with ventral lobe directed meso-ventrally, with two smooth, long and sharp, claw-like prensisetae; female: spermatheca oval (see Merz (1996): Figs 45–47, 68). Switzerland, Italy, Hungary................................................................................... H. pseudoluctuosa Hennig

– Apical spot smaller, extending from distal one-quarter of r1 cell middle of r4+5 cell width. Discal crossband entire (Fig. 3). Male terminalia: surstylus with ventral lobe almost straight, directed ventrally, with two serrate prensisetae (Figs 5–7); female: spermatheca flattened spherical, short (Fig. 12). Turkey........................................... H. lazi sp. nov.