Cotesia eunomiae Shaw, 2009

Material examined.

Belgium: Luxembourg, Pisserotte, ex. Boloria eunomia, vi.2004, leg. J. Choutt, individuals from separate gregarious broods, MS 106; MS 107; MS 108 ; Finland: Janakkala, ex. Boloria eunomia, 14.vi.1992, leg. M. R. Shaw, MRS-JFT 0655; MRS-JFT 0656 ; France: Pyrénées-Orientales, Porte, ex. Boloria eunomia, 30.v.2001, leg. T. Lafranchis, MRS_JFT 0118 ; Germany: Bavaria: Rhön, Hausen, Kleines Moor, 50.487, 10.039, 890 m, Malaise trap, 11.vii.2018, leg. D. Doczkal, ZSM-HYM-33165-E05 .

Geographical distribution.

PAL.

PAL- Belgium, Finland*, France*, Germany*.

Molecular data.

BIN: BOLD:AAV9098.

Host information.

Nymphalidae: type reared from Boloria eunomia (Esper, 1800).

Notes.

Our specimen from Germany matches the original description and clusters very closely (max. p-dist 0.34%) with six specimens (MRS-JFT 0655, MRS-JFT 0656, MS 106, MS 107, MS 108, MRS_JFT0118) reared from Boloria eunomia, the host of the holotype (Shaw 2009). This wasp species appears to be completely specialised to Boloria eunomia, which is classified as a highly endangered species in Bavaria and Germany (Reinhardt and Bolz 2011; Voith et al. 2016). As our German specimens are not reared, we checked the platform iNaturalist (https://www.inaturalist.org/) to verify whether this rather rare host occurs in this area. In a 5 km radius of our sampling site we found eight observations of B. eunomia . All these observations were confirmed by a lepidopterist via photos uploaded to iNaturalist. This species is illustrated in Fig. 11.