150 years after Ferdinand Morawitz: a survey of megachilid bees (Hymenoptera, Megachilidae) of Dagestan, Russia

A list of 148 species of megachilid bees from 16 genera and five tribes is reported for the Republic of Dagestan. The list is based on more than 2,500 examined specimens and one reliable literature record. Twelve species are new to Russia: Chelostoma (Chelostoma) emarginatum (Nylander, 1856), C. (Foveosmia) maidli (Benoist, 1935), Hoplitis (Alcidamea) campanularis (Morawitz, 1877), H. (A.) caucasica (Friese, 1920), H. (Anthocopa) perezi (Ferton, 1894), H. (Pentadentosmia) tringa (Warncke, 1991), Osmia (Allosmia) melanura Morawitz, 1871, O. (Helicosmia) breviata Warncke, 1988, O. (Osmia) scheherazade Peters, 1978, O. (Pyrosmia) saxicola Ducke, 1899, Anthidium (Anthidium) taeniatum Latreille, 1809, and Megachile (Chalicodoma) montenegrensis Dours, 1873. Nine other species are new to the North Caucasus, and 46 other species are new to Dagestan. Compared to the first list of the bees of Dagestan published by F. Morawitz 150 years ago, the number of species of Megachilidae known from the republic was increased by five times.