Megachilid bees (Hymenoptera: Megachilidae) of the Nakhchivan Autonomous Republic of Azerbaijan: tribes Lithurgini, Dioxyini, and Megachilini Author Maharramov, M. M. Author Fateryga, A. V. Author Proshchalykin, M. Yu. text Far Eastern Entomologist 2021 2021-04-02 428 12 24 http://dx.doi.org/10.25221/fee.428.3 journal article 10.25221/fee.428.3 2713-2196 7165906 60939193-F0CA-4C25-A936-97B57E15BB91 Megachile ( Chalicodoma ) albocristata Smith, 1853 MATERIAL EXAMINED. 18 – 25.VI 2020 , 1 ♀ , MM [FSCV]; 40 – 13.VI 2019 , 1 ♀ , DISTRIBUTION. Western and Southern Europe, Russia (European part), Georgia , * Azerbaijan , Turkey , Iran . REMARKS. Females of this species are remarkably polymorphic in the color of the pilosity: typical form has tufts of whitish setae on each lateral side of the propodeum and on the terga 1–3, while some populations (e. g., from Dagestan ) have also a tuft of whitish setae on the mesepisternum and complete bands of whitish setae on the terga 1–5 (Fateryga & Proshchalykin, 2020). The examined female specimens from Nakhchivan AR differ from the typical form of M. albocristata (e. g., from the Crimea) by an even darker pilosity: they are almost completely black. In addition, both females and the male examined have smaller body size in comparison with the material from both the Crimea and Dagestan .