 In "Prionyx", several Nearctic and Palaearctic species catch a grasshopper, and then dig a nest for it, so there is one prey per nest.The nest consists of a single cell, and the egg is laid touching the coxa of a hind leg.In contrast, a Neotropical species, "P. spinolae", digs the nest first, creating multiple cells, and stocks each cell with 5–10 grasshoppers; the egg is laid on the underside of the thorax.