Posted by Ectemnius on 19-09-2013 10:44
#6
S. elegans has yellow humeri. S. clunipes does not... However colour in Sphegina is not always as it 'should' be. I have S. elegans in collection which have dark humeri. The other difference is that S. elegans has a very long and thin second abdominal segment. The segment here is sshorter and thicker. That would make it S. clunipes.
Greetings,
Ectemnius