Can anyone please name a Bibio species with a clear red/orange band 
around the body - almost certainly the natural fly that has given rise 
to the angler's Bibio pattern:

    http://tinyurl.com/hsza9

I saw a lot on 22nd, close to St Mark's day, but the only pics I can 
find of St Mark's Fly, Bibio Marci, lack the red band around the middle.

(It's definitely not Bibio Hortulans, which has a red thorax.)

-- 
Nogood Boyo