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Key to Nordic Metopiinae
Metopiinae
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Ichneumonoidea
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Ichneumonidae
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Metopiinae
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Steps
Taxa:
Face
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Face with a large and flat or concave shield-shaped area bounded by a ridge.
Face entirely convex, without shield-shaped area.
Areolet
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Areolet present.
Areolet absent.
Spurs
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Hind tibia with one spur, middle tibia with two spurs.
Middle tibia with one spur, hind tibia with two spurs.
All tibiae with two spurs.
Clypeus
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Clypeus produced into a distinct point medially.
Clypeus not produced into a point, though sometimes with a small tooth medially.
Epipleura
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Epipleura of tergite 3-5 absent or represented by narrow, inconspicuous vestiges.
Epipleura of tergite 3-5 well-developed.
Occipital carina
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Occipital carina absent.
Occipital carina present.
Frons
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Base of antennae separated by a high longitudinal carina which becomes a deep groove just in front of the anterior ocellus.
Base of antennae usually not separated by a carina. If carina present then it does not become a groove in front of the anterior ocellus.
Tergite 1
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Tergite 1 clearly narrowed towards the base from about the midpoint. Spiracles placed between 1/3 and 1/2 of the way back.
Tergite 1 relatively broad towards the front. Spiracles placed about 1/4 of the way back.
Pronotum
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Pronotum with a distinct but shallow groove parallel to its upper edge.
Pronotum without a distinct groove parallel to its upper edge.
Head
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Head in lateral view abruptly sloping behind ocelli (outer spur of hind tibia about 2/3 as long as inner spur).
Head more rounded in lateral view. (outer spur of hind tibia usually shorter than 2/3 times inner spur).
Facial horn
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Facial horn distinct and more or less pointed.
Facial horn absent or truncate.
Remaining taxa:
Carria paradoxa
Chorinaeus
Colpotrochia cincta
Exochus
Hypsicera
Ischyrocnemis goesi
Metopius
Periope auscultator
Spudaeus scaber
Synosis karvoneni
Triclistus
Trieces
Discarded taxa:
Info
This key covers all known northern European genera of Metopiinae.
References
Johansson, N. (2021). Revision of the Swedish species of Metopius Panzer, 1806 (Hymenoptera: Ichneumonidae: Metopiinae) with an illustrated key to the species of Northwestern and Central Europe. Entomologisk Tidskrift 142: 37–69.
Johansson, N. & Astafurova, Y. (2025). Revision of the Swedish species of Exochus Gravenhorst, 1829 (Hymenoptera: Ichneumonidae: Metopiinae) with an illustrated key to the species of the Western Palaearctic. Entomologisk Tidskrift, Supplement. Sveriges entomologiska förening, Uppsala.
Medvedev, G.S. (ed.) (1986). Opredelitel nasekomykh evropeiskoi chasti SSSR. T. 3. Pereponchatokrylye. Ch. 3. Akademiia Nauk SSSR Zoologicheskii Institut. Nauka, Leningrad.
Townes, H.K. & Townes, M. (1959). Ichneumon-flies of America north of Mexico: 1. Subfamily Metopiinae. United States National Museum Bulletin 216(1): 1–318.
