Je viens de passer cette bestiole dans la moulinette de Kurzenko et Gusenleitner et je trouve
Sapyga (Sapyga) similis 
(je crois qu'il n'y a pas
octoguttata dans sa clé, en tout cas pas sous ce nom-là. Voici ma démarche, je traduirai demain, là je fatigue.
1. Anterior side of the third radiomedial cell of forewing much shorter than posterior one
4. male : antennae fusiform or slightly thickening towards
apex, last two segments another form, without such concavities (figs 20, 21, 30, 48, 69-74). 9: head, seen from the front, rounded or wider than high, outer outline of eye regularly convex (figs 36, 52); frontal tubercle with more or less distinct border (
transverse carina or, at least, angular bend) between its upper face and lower vertical part
5. Malar space not longer than diameter of anterior ocellus (fig. 78);second submarginal cell of forewing shorter and wider, position of nervulus (with rare exceptions) interstitial (figs 25, 29, 41); hind coxae posteriorly on outer side with more or less distinct vertical carina (fig. 79). 9: the last abdominal
sternite ventrally rounded, without ridge (fig. 80). Smaller, length 6-16 mm
7. male : the last antennal segment another shape, as a rule (except in Sapyga singla nov. sp.) much smaller than preapical one, without tyloid (figs 48, 72-74). Lateral sides of
propodeum in both sexes entirely punctuated or with small, smooth, fairly shining area (
Sapyga LATREILLE)
9. Forewing with submarginal cells 2 and 3 shorter and wider, the abscissa 3 of radius distinctly shorter or, at most, about equal to abscissa 4, first radiomedial vein arcuated (fig. 41); the upper horizontal face of frontal tubercle separated from its lower part with more or less distinct
transverse carina; abdominal
sternite 2 in basic part convex (fig. 95). 8: the last antennal segment much smaller than preapical one, both of them about the same colour (figs 48, 72-74) (subgenus
Sapyga s.str.)
11. Humeral angles obtuse (fig. 96); lateral sides of
propodeum as a rule entirely punctuated; antennae in both sexes long and thin,
flagellum with all of segments (except for the
apical one in 8) clearly longer than wide (figs 72, 97). $>:
thorax, excluding
pronotum, without light marking
12. female : malar space coarsely punctuated; eye-emargination light, on lower part only; light markings on the abdomen very variable, usually
tergites 1 and 2 (fig. 110) and stemite 2 (fig. 111) at least partly brownish-orange, rarely entirely black (figs 112, 113), the last stemite without light mark. male : antennal
flagellum above partly orange; frons and mandibles with yellow marks; at least fore and mid tibiae partly or totally light; the last abdominal segment entirely black (figs 114, 115). Europe, the Asian part of Russia to the east up to the Pacific ocean, Mongolia, Northern China
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Sapyga (Sapyga) similis (Fabricius)