Posted by David Gibbs on 23-10-2006 11:23
#6
>>Characteristically P. anderssoni lacks the apical spot in the wing. That's the chararcter that lead them to the discovery of this new species.
this seems to be the case in Scotland, the type locality, but in southern Britain andersoni normally has a dark wing tip, especially in males, so are only certainly identifiable on characters of aedeagus