sp. n., a new Pincer wasp from Jalisco, Mexico (Hymenoptera, Dryinidae).

A new species of Ljungh, 1810, , from Jalisco, Mexico, is described and illustrated. In the Neotropical region, is similar to Olmi, 1998, but it is distinguished by the black mesosoma (except prothorax, mesoscutum, and mesoscutellum that are yellow), and the metapostnotum being granulated and not rugose; in the mesosoma is completely black and the metapostnotum is granulated and strongly rugose. In the Nearctic region, the new species is morphologically similar to Krombein, 1962, but it is distinguished by the dull and granulated metapostonotum; in the metapostnotum is shiny and unsculptured. The new species belongs to group 7. The keys to the females of the Nearctic and Neotropical species of this group are modified to include the new taxon.