Ruby-tailed wasps

The wall at the back of our dining room is a real sun trap and I often have a glance at it to see what insects are there basking on the hot bricks. Today I was rewarded with two or three ruby-tailed wasps (Chrysis ignita). These are beautiful, tiny solitary wasps with a turquoise body and ruby red tail but they are tiny and as yet have eluded my camera!