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Hello,

The quality of the photos is really poor, sorry for that; but it would appear there are few available, if any, of this species so I put them here anyway.
After submitting the pictures to the knowledgeable people at insecte.org they came with a male Eucoryphus coeruleus as ID. The remarkable antennae give the genus and the sex, while the black tibiae indicate the species.
Do you agree ?

August 28th, 2018, Gemmipass, Switzerland, on sand banks. Altitude: 2290m.
Body size: ~3.2 mm