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...as can be seen here Ichneumon stramentor show the antennae segments 8 to 13 as white, and a yellow mark on the apical end of the abdomen. Indicating, I think, that this is not as suggested.
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Emphasizes the difficulty in pinning this one down.
(Apologies for the collectors pun.)
The (re)search goes on...
Wishing you all the best for 2013
This is a male, most probably of the genus Ichneumon but I can't entirely rule out some related genera. There is a comment about Ichneumon stramentor above but the pale marks on the antenna and the apex of the abdomen apply only to females. There is pronounced sexual dimorphism in Ichneumon (and many Ichneumoninae), with many species having males that are a lot more similar to each other than the females are. Most males are difficult to identify from a specimen and certainly not confidently identifiable from a photo. A few Ichneumon species are distinctive in both sexes, e.g. I. xanthorius, sarcitorius, but most look like the insect in the photo. Note that Amblyteles armatorius, also mentioned here, has a very different colour pattern.
Most definitly as you say, next time I see one I'll see if I can capture it and get off to an expert.
Lat/Lng: 53.2, -0.6
OS grid ref: SK9668