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Hi Sergiy

I have no doubt this is Kirbya indeed. ON the species, I am less sure.
It seems that the petiole is too long for unicolor. Also the length of the costal spine and the marginals on tergite 4 support moerens rather than unicolor. Please note that the abdomen is unicolour as well in the female of K. moerens. Is this female ?

And, you might improve the quality of your pics by putting your specimen in a white 'box' of paper and using a white paper screen on the background.

Theo