Episyron gallicum is a spider-eating wasp which, as its name suggests, has a distribution centred on France.
It hunts terrestrial spiders which hunt their prey such as Wolf spiders as opposed to web weaving spiders. The spider is paralysed with a sting and then the helpless spider is sealed in a tunnel and the wasp lays an egg on it. The grub dines on the living spider when it hatches.[1]
Open terrain with loose sandy soil.
Southern Europe but has recently expanded its range into Poland, Germany and the United Kingdom.