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Hi,

yes, you are right, this is a male Eutolmus rufibarbis. The "golden" tuft of hairs on the quite elongate and slim tab at the posterior margin of sternite 8 is quite characteristic for Eutolmus rufibarbis (when you are taking into account the German species only). Some Machimus species have light long hairs on a similar tab, too. But the tap of German Machimus species is much shorter and therefore broader.

Johannisthal?

Greetings, Danny