The genus <i>Macrohynnis</i> Förster in N. Europe, especially Finland (Hymenoptera: Diapriidae: Belytinae)

The genus Macrohynnis was described by Förster (1856) without any included species. The first included species or the type species of the genus, M. lepidus, was described by Mayr (1904) from Förster’s collection. Two other species have been described from Europe: M. rufiventer Kieffer, 1908 and M. fragilis (Nixon, 1957) as Cinelaptus fragilis. The Holarctic species were revised by Macek (1997). He synonymized M. rufiventer with M. lepidus and gave the world distribution of M. lepidus: Europe, Japan, Taiwan, Canada and USA. He described a new Holarctic species M. ferrugineus Macek from the Czech Republic, Austria, Canada (most records) and USA. Macrohynnis fragilis is very rare and according to Nixon (1957) and Macek (1997) altogether five females have been reported from Austria, Slovakia and Ireland. The three European species are rare and seldom collected. For instance, when Wolter Hellén (1964) treated the Finnish belytine fauna on the basis of 4500 specimens, he did not find the genus Macrohynnis from Finland. Two species have been reported from N. Europe: M. fragilis from Sweden (Landin 1971) and M. lepidus from Finland (Macek 1997). Author VV found the first specimen of M. fragilis in 1963 from eastern Finland. In this paper we treat the distinguishing taxonomic characters of the species and summarize what is known about the species of the genus in Finland and North Europe.