A key to European species of Hyposoter Förster, 1869 (Ichneumonidae: Campopleginae) with descriptions of 18 new species, and notes on all included species Author Galsworthy, Anthony 0009-0009-6612-9847 acgalsworthy@btopenworld.com Author Shaw, Mark R. 0000-0002-6651-8801 markshaw1945@gmail.com Author Haraldseide, Håkon 0009-0009-6612-9847 acgalsworthy@btopenworld.com text Zootaxa 2023 2023-05-18 5290 1 1 73 http://dx.doi.org/10.11646/zootaxa.5290.1.1 journal article 53361 10.11646/zootaxa.5290.1.1 36037514-64e6-4cde-88f9-583b4b9d8bf1 1175-5326 7959256 FD54D381-F123-4958-A03E-6CA71E02D06A Hyposoter dumeticola ( Holmgren, 1860 ) Limneria dumeticola Holmgren, 1860 : lectotype ♀ in NHRS, designated by Hinz (1964) , examined by Horstmann. We have not seen specimens of this species: however, Horstmann had examined the lectotype and left in his notes a full description of it. It is one of four species with black metasoma, pale fore and mid coxae, and more or less orange hind tibiae; it should be distinguishable from monensis sp. nov. and pechipogator sp. nov. by its finely granulate area petiolaris (rugulose in the other species). It shares this with rivulator sp. nov. , which however has a single keel instead of a trapezoidal area basalis on the propodeum, and a clear yellow sternite 2 as opposed to a strong brown band across the middle of it. The species is reported only from Sweden and Russia , and is perhaps boreal. Its biology is unknown.