This wasp nests in both level sandy exposures and in vertical soil faces. Some nesting aggregations may number as many as 15,000 burrows (Else 1995a,b). The main nest burrow may be up to 1 m in length, with 3-34 short lateral burrows at the end, each terminating in a cell (Lomholdt, 1975). The prey is paralysed by being stung through the articular membranes immediately behind the front legs (Rathmayer, 1962). Returning females, clutching the prey with their legs, often hover above the nest burrow before slowly descending to it. Nesting biology and behaviour are described by Curtis (1829), Olberg (1953, 1959), El-Borollosy et al. (1972), Lomholdt (1975), Simon Thomas (1966), Simon Thomas and Simon Thomas (1972), Simon Thomas and Veenendaal (1978), Tinbergen (1932, 1958, 1969, 1974) and Vergne (1935). Olberg's (1959) publication is particularly good for descriptions and illustrations of nest construction and provisioning.