This is an enormous wasp, fully 1.5 inches long. It is a solitary wasp which burrows into the soil to create a cavity or its larvae, and then provisions this cavity with a paralyzed cicada which the adult has captured and stung. The burrows can be up to 4 feet deep with several side branches and cells for a number of larvae. Piles of soil are left at the surface around the entrance hole. The fully developed larva then spends the winter in the soil, pupates in the spring and emerges as an adult wasp. The females can sting but are unlikely to do so as solitary wasps. The males can be very pugnacious and curious about intruders, but they are harmless. Control may be needed when large populations occur around playgrounds or when the activity is in well kept turf and causes unsightly piles of soil.
Prevention may be accomplished by covering the soil with a thick layer of mulch that discourages digging. Holes may be dusted with an insecticide dust that can penetrate into the subterranean cells, killing adults and developing larvae.