none Entered (abhilash.nair@helsinki.fi) purchase/We developed 31 microsatellite loci for a specialist hyperparasitoid wasp, Mesochorus cf. stigmaticus that parasitizes the parasitoid Hyposoter horticola, in land islands of southwestern Finland. The microsatellites were developed from 454 sequencing of the enriched libraries. The details of primers and the polymerase chain reactions for these microsatellite markers are described. All the loci tested on 24 samples were polymorphic with on average 4.1 alleles per locus (range 2-13). Genetic diversities as measured by average expected heterozygosity (HE) and allelic richness (AR) were generally high (HE a[per mill] 0.10-0.80; AR a[per mill] 1.9-11.5). These markers will be useful in population genetic studies of this parasitoid and other related taxa. Jun 2015