Posted by Tony Irwin on 03-04-2011 15:31
#9
I'd rather ID this using genitalia, as I'm not familiar with
brunneipennis, but this does look like a typical British
sibilans.
L.pilosigenis is a synonym of
L.sibilans (the original description only differs in face colour - something that can change during an individual fly's lifetime).
Edited by Tony Irwin on 03-04-2011 15:32