According to Tsuneki (cited by Lomholdt, 1975-76) the nest is a burrow about 10 cm long terminating in one to three cells, which are placed one after the other as simple dilations of the tunnel. There are sometimes side branches, so that the nest may have as many as 12 cells. The female wasp flies the prey to the nest, where it is stored near the sealed nest entrance until there is sufficient to provision several cells. The egg is laid on the first stored bug in each cell. The larva develops in three days in Korea, where there may be more than one generation per year. In British and Scandinavian populations the species probably overwinters in the pupal stage (Lomholdt, 1975-76). Males guard small stones or twigs lying on the ground, making inspection flights every few minutes and returning to the same spot. They turn to face anything new in their field of vision (M Edwards, pers. comm.).