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I tend to agree with you Jan, I'm the first person to question distribution.

I have checked on the diptera listing here, P. anderssoni has not even been given a status as being in either Britain or Ireland where P. ustulata has.

http://www.dipter...p?id=12128

http://www.dipter...p?id=12159

I was waiting for someone to question this, I do know if I had questioned it I would not have been taken seriously!

A Google search only brings up a record or records for Scotland.

http://www.google...f6582b4550

Can anyone tell me what the difference is between the two? What distinguishing feature does one have that the other does not, or is it a genitalia job?