New Species - Broad-banded Nomad Bee

I think I was lucky in that the one photo I hurriedly took as this Nomad Bee flew past was enough to identify it. It is the only Nomad Bee with such broad yellow bands - hence Broad-banded Nomad Bee (Nomada signata). The bee book describes it as scarce but I am told it is reasonably common around here. It is parasitic on the Tawny Mining Bee which I found for the first time here recently.