#4
I am still struggling with this specimen, despite microscoping the genitalia. Comparing the structure e.g.
here, it seems to be intermediate between
C. rustica and
C. ardea. Any idea?
#5
I don't have access, but would be interested to know whether in Stubbs & Drake (2001)
British soldierflies and their allies there are other features mentioned that separates the two species - or can just the aedeagus be used?