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Hello Rosevinge, I hope that you are having a splendid day. :)

this one is very difficult. I have spent an hour trying to analyze it. I think that this is clearly in the rudis group but it is not rudis. I think that it could be angustigena but there are some inconsistencies with this id. If you have a specimen, i can check the genitalia for you. I am more than happy to look at it for you. I don't think that you keep specimens but if you have it then you can send it to me.

one ad and two marginal scutellar bristles point to angustigena. the vestiture seems to match but i cannot tell if there really are golden hairs on f2 and f3. the posterior spiracle is somewhat visible and it reminds me of angustigena but i would need microscopic photos of this spiracle to be certain. Pollenia are extremely difficult at times even with genitalia. I once thought that i had angustigena even with genitalia but further analysis revealed it to be rudis. Very tricky.