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 praecaedator Aubert, 1963 ( Fig. 42 ) Hyposoter praecaedator Aubert, 1963 : lectotype ♀ in MZLS, here designated, labelled “TYPE // HYPOSOTER ♀ ; (=ANILASTUS) Aub; PRAECAEDATOR // J.F.AUBERT; 28.8.1961 VAR; LE PRADET. Syntype 1/6 Hyposoter praecaedator Aubert , labelled by S. Klopfstein 2009 “ The species is based on a series of six syntypes ( Klopfstein et al. 2011 ), which had been examined by Horstmann. We have seen the single syntype designated above as lectotype . This is a small species, very similar to Hyposoter caedator in build, but differs from examples of the latter with pale fore and mid coxae mainly in the more shiny speculum, the extensive reddish coloration of the apex of the hind coxa, the stronger punctation of the lower mesopleuron, and the paler colour of the hind tibia. Hyposoter leucomerus is larger, and has a similarly coloured hind tibia (though the medial colour is usually paler), but always has a dark rear edge to the second tergite, lacking in praecaedator . The biology is unknown, and the species is known only from the south of France .