This key includes the two northern European species of Oxytorinae. Sadly, according to Rossem (1980), none of these characters are always reliable for the males.
References
Rossem, G. V. (1980). A revision of some Western Palaearctic Oxytorine genera (Hymenoptera, Ichneumonidae).
Spixiana. Supplement. 4, 77-135.
