Megarhyssa, Ashmead, 1900

Varga, O., 2020, Identification of the Ukrainian Megarhyssa species (Hymenoptera, Ichneumonidae, Rhyssinae), with notes on the Romanian fauna, Ukrainska Entomofaunistyka (Oxford, England) 11 (2), pp. 17-21 : 18

Key to the Ukrainian species of the genus Megarhyssa

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7. — Females.................................................................................................................................................................... 2 Males. ...................................................................................................................................................................... 5 Metasoma black AND with whitish spots ( Fig. 4). Clypeus entirely black ( Fig. 10). ............................ M. rixator Metasoma entirely black OR with yellow spots. Clypeus at least dark brown basally and laterally. .................... 3 Clypeus yellow apically ( Fig. 11). Spots on tergites long, situated on proximal part of tergites ( Fig. 5). Generally, lighter species with abundant yellow and orange colouration. ................................................................ M. perlata Clypeus darker, from brown to black apically. Darker species with body colouration often from brownish to black. ...................................................................................................................................................................... 4 Clypeus more-or-less uniformly brown to dark brown ( Fig. 12). Metasomal tergites with round spots, situated on distal part of tergite ( Fig. 6). ................................................................................................................ M. vagatoria Clypeus with apical black patch, which can extend in dark specimens almost to its base ( Figs 7–9). Metasoma from uniformly black to brownish with yellow spots, which are situated on proximal part of tergite ( Figs 1–3). ................................................................................................................................................................. M. superba Paramere apically with an elliptic sclerotized area ( Figs 13–14). .......................................................................... 6 Paramere apically with a horseshoe-like sclerotized area ( Figs 15–16). ................................................................ 7 Clypeus yellow apically. Sclerotized area descend into a groove almost reaching the base of paramere ( Fig. 16). .................................................................................................................................................................. M. perlata Clypeus at least with a central dark patch. Sclerotized area not descend into a groove ( Fig. 15).................................................................................................................................................................. M. superba Clypeus and metasoma black. Second metasomal tergite marked with whitish. .................................... M. rixator Clypeus and metasoma brownish. Second metasomal tergite marked with yellow. ........................... M. vagatoria