EN
The paper gives records of Pseudomalus triangulifer (Abeille de Perrin, 1877), the new species of ruby-tailed wasp from Poland (Hymenoptera: Chrysididae). The species was not separated by many authors from P. auratus (Linnaeus, 1758) until recently. The characters for distinguishing of the two species are given, followed by the verified data of distribution in Poland. P. triangulifer (Abeille) seems to be widespread but rare in Poland.