I've been surprised at the number of small parasitic (?) wasps amongst recently-fallen leaves. I've managed to photograph a few including this rather attractive specimen (3-4mm), with a bronzy/green metallic sheen to its cuticle. I can't find anything similar illustrated in any of my books. Can anyone help?
It's a species of Pteromalidae, which are indeed parasitoid wasps. I don't know enough about pteromalids (I work mainly on Ichneumonidae) and there are hundreds of similar species, often with very attractive metallic colours. Many are parasitoids of Diptera puparia and perhaps that could account for the numbers in leaf litter.