I attach a foto from:
Varga A. 2014. A review of the genus Xorides Latreille, 1809 (Hymenoptera, Ichneumonidae, Xoridinae) in the Ukrainian Carpathians. Journal of Insect Biodiversity 2(7): 1–9.
The conclusion is may be right (I can not see enough details to be sure), but the link you post are totally wrong (may be a Tryphoninae).
I do not have good enough literature on Xorides, but after what I find (without a new revision available) is that niger should have femora 3 black, fuligator femora 3 red and first tergites red. If the colours are good enough to separate them this one could be fuligator.
I guess that Jacek Hilszczanski has been working so much with Xorides that his conclusion should be accepted.
Are there a new revision of Xorides available or soon to come?