Site Help: Solitary wasp that builds nests behind pictures in my house, 1 by bugfan51

bugfan51 wrote:
Hello kennedyh, many thanks for taking the trouble to reply to my entry and sincere apologies for not coming back to you sooner. Sorry I couldn't get a better of that wasp but the little blighters don't stay put long enough and it's now the end of season so don't see any more.
Incidently I found 27 nests behind one picture so they can be prolific.
Just out of intererest I attach a pic of one very dead little spider found in one nest.
Best wishes and thanks again.
Bugfan51