| Gelis apterus |
| Authority | : | (Pontoppidan, 1763) |
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| Aekingerzand, the Netherlands; 18 May 2008. Apterous female. First observation in the Netherlands. |
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| Meringopus callescens |
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| Hasliberg (Bern), Switzerland; 6 July 2008. | |
| Stenarella domator |
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| Amstelveen, the Netherlands; 10 May 2011. Female ovipositing is nests of the bee, Osmia bicornis. | ||