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Many thanks Ebbek. I checked the colouration of the labrum of two species of mine. Labrum clearly black in my first image, and yellow in the second one.
Geographically, albipes is represented in Turkey only from Black Sea coast (very humid region), but euboeense is reported from Central and East Turkey (dry, cold mountainous climate). My second species comes from East Turkey; therefore, euboeense fits geographically better.

Muhabbet