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I've found it in my kitchen. It seems to be that he flew through the window from the street.

The country is Russia.

Unknown flyting beetle. Top side Unknown flyting beetle. Bottom side

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I am not an entomologist, I just happen to have worked on the genome of the red flour beetle, Tribolium castaneum and this looks very similar. A quick wikipedia search turned up the amusingly named "confused flour beetle", Tribolium confusa, which looks almost exactly like what you have photographed:

enter image description here

So, I would guess (I stress that I don't really know) that this is some sort of Tribolium species and, by now, is thoroughly confused even if it was not to begin with.

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Thank you very much for the answer. I've just read about this on Wikipedia and found that this is a Mealworm — — a bigger version of a Tribolium. – Sunny Reborn Pony May 27 '13 at 4:57
@SunnyRebornPony well done! Could you please post that as an answer and accept it? The species name is mealworm beetle, Tenebrio molitor, mealworms are the larval (apparently edible!) stage. – terdon May 27 '13 at 14:04
up vote 3 down vote accepted

This is Mealworm beetle, Tenebrio molitor, a species of darkling beetle.

Tenebrio molitor

Thank you @terdon for help!

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