Key to females of Palaearctic species of Gonatocerus (Gonatocerus)

1 Mps only on F8 or F7 and F8............................................................................ 2

– Mps normally also on funicle segments other than F7 and F8 on at least one antenna................................ 3

2(1) Fore wing with discal setae originating behind about middle of submarginal vein (Figs 20, 24)............................................................................................... G. (Gonatocerus) fuscicornis (Walker)

– Fore wing with discal setae originating behind base of marginal vein (Fig. 4)......... G. (Gonatocerus) aegyptiacus Soyka

3(1) F5 and F6 each with 2 mps.............................................................................. 4

– F5 with 0 or 1 mps and F6 with 0–2 mps................................................................... 5

4(3) F4 with at most 1 mps; ovipositor at least 1.9× as long as mesotibia....... G. (Gonatocerus) longicornis Nees ab Esenbeck

– F4 with 2 mps; ovipositor at most 1.4× as long as mesotibia.......................... G. (Gonatocerus) bukashka sp. n.

5(3) F5 without mps............................................................. G. (Gonatocerus) pictus (Haliday)

– F5 with 1 mps at least on one antenna..................................................................... 6

6(5) Clava at least 3.6× as long as wide; funicle segments relatively longer (Fig. 28), funicle length at least 2.4× clava length; fore wing with discal setae relatively shorter and much more numerous (Fig. 30)............. G. (Gonatocerus) koziavka sp. n.

– Clava at most 3.2× as long as wide; funicle segments relatively shorter (Fig. 12), funicle length at most 2.1× clava length; fore wing with discal setae relatively longer and less numerous (Fig. 15).................. G. (Gonatocerus) cincticipitis Sahad