Helorus rufipes. You don’t get much more obscure than this. It’s one of three British species of the family Heloridae, a family found over much of the globe but not one of the hymenopteran success stories, with only a small number of species. They’re not very big and they are not very flashy but they do live in British woodlands and gardens and are quietly going about their business, laying eggs in lacewing larvae and eating them from the inside. This specimen was on the wall by my back door as I left for work one morning. But you won’t find Helorus in many field guides or many online illustrations. Just one of many obscure families of Hymenoptera that fill our landscape.
Sorry for the blurred photo but it flew before I could get a better one.