sand wasp

from The Century Dictionary.

• noun A fossorial hyme-nopterous insect which digs in the sand; a digger-wasp, as of either of the families Pompilidæ and Sphegidæ, and especially of the genus Ammophila.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A predatory crabronid wasp that builds burrowlike nests in the ground.