An illustrated key to the cuckoo wasps (Hymenoptera, Chrysididae) of the Nordic and Baltic countries, with description of a new species Author Paukkunen, Juho Author Berg, Alexander Author Soon, Villu Author Odegaard, Frode Author Rosa, Paolo text ZooKeys 2015 548 1 116 http://dx.doi.org/10.3897/zookeys.548.6164 journal article http://dx.doi.org/10.3897/zookeys.548.6164 1313-2970-548-1 D5D7B51E5AC6460D9B3C7584E46F9B3F D5D7B51E5AC6460D9B3C7584E46F9B3F Taxon classification Animalia Hymenoptera Chrysididae Genus Philoctetes Abeille de Perrin, 1879 Figs 35, 36 Philoctetes Abeille de Perrin, 1879: 27. Note. The taxonomic rank and delineation of Philoctetes has differed among several authors. We follow the definition given by Kimsey and Bohart (1991) and consider it as a distinct genus. Philoctetes is characterised by the following diagnostic features: mesoscutum with large punctures concentrated along notauli; central malar space without carina; mesopleuron rounded and weakly projecting ventrally; metascutellum usually conical; posterior margin of T3 usually deeply notched medially. The hosts consist of crabronid wasps of the subfamily Pemphredoninae . Approximately 40 species are recognised worldwide, and about 30 of these are Palearctic ( Kimsey and Bohart 1991 ). A total of 22 species are known from Europe ( Rosa and Soon 2012 ), but only Philoctetes truncatus is found in the Nordic and Baltic countries ( Paukkunen et al. 2014 ). Figure 35. Philoctetes truncatus ♀. Scale 1 mm.