Abstract
Data on 14 species of the genus Colletes Latreille, 1802 collected in the Nakhchivan Autonomous Republic of Azerbaijan in 2018-2025 are provided. Among them, Colletes perplexus sp. nov. is described as new to science. Colletes caskanus (Strand, 1919), C. glaber Warncke, 1978 and C. idoneus Cockerell, 1922 are newly recorded from Azerbaijan and ten species are newly recorded from the Nakhchivan Autonomous Republic. Now 43 species of Colletes are known from Azerbaijan. As a result of its first discovery in Azerbaijan, the intraspecific variation of the variable C. glaber was examined through its range and the new species C. quadratus Kuhlmann, sp. nov. from southeastern Turkey is described.