Length 4–6 mm.
The species is characterised by the entirely blue, greenish or violet-blue body, and the forewing radial sector vein, which ends remote from the wing margin (Fig. 76). The T3 is posteriorly edentate and has a small tooth anteriorly.
Denmark, Latvia, Sweden. Very rare.
Trans-Palearctic: from western Europe to Mongolia (Linsenmaier 1959).
Be aware that the records present in the GBIF map may be misleading for some countries due to unrevised data sets or missing information.GBIF Taxon: Spinolia unicolor (Dahlbom, 1831)
Habitat: xerothermic sparsely vegetated sandy areas, often close to the seashore. Adults occasionally visit flowers of Asteraceae, Lamiaceae and Rosaceae (Trautmann 1927, Benno 1950, Linsenmaier 1959).
Flight period: late June to mid-August.
Host: Pterocheilus phaleratus (Panzer) (Vespidae: Eumeninae) (Erlandsson 1968, Sörensson and Cederberg 2010).