''Pristaulacus rufitarsis'' is a species of wasp in the family

Aulacidae The Aulacidae are a small, cosmopolitan family of wasps, with two extant genera containing some 200 known species. They are primarily endoparasitoids of wood wasps (Xiphydriidae) and xylophagous beetles (Cerambycidae and Buprestidae). They are c ...

, which is found in North America. This wasp is known for its parasitic behavior, particularly targeting the larvae of certain wood-boring beetles like the Hemlock borer (Phaenops fulvoguttata) and the poplar borer (Saperda calcarata).

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