The family of minute tree-fungus beetles has worldwide distributed and has counting about 650 species (Lopes-Andrade, 2011). About 75 species are known for Europe (Królik, 2020), the vast majority of them also occurs in the territory of Ukraine, where the greatest biodiversity is observed in the territory of the Ukrainian Carpathians – 38 species (Drogvalenko, 2008; Diedus, 2020). The family Ciidae is represented by 15 species in the collection of the State Museum of Natural History, National Academy of Scienses of Ukraine (SMNH). The most numerous is the genus Cis, which is represented by eight species: Cis bidentatus (Olivier, 1790) – 3 spec., C. boleti (Scopoli, 1763) – 24 spec., C. castaneus (Herbst, 1793) – 15 spec., C. comptus Gyllenhal, 1827 – 1 spec., C. glabratus Mellié, 1848 – 1 spec., C. lineatocribratus Mellié, 1848 – 1 spec., C. micans (Fabricius, 1792) – 19 spec., C. villosulus (Marsham, 1802) – 2 spec. In five genera we have one species: Dolichocis (D. laricinus (Mellié, 1848) – 2 spec.), Wagaicis (W. wagae (Wankowicz, 1869) – 4 spec.), Orthocis (O. alni (Gyllenhal, 1813) – 2 spec.), Rhopalodontus (R. perforatus (Gyllenhal, 1813) – 9 spec), Octotemnus (O. glabriculus (Gyllenhal, 1827) – 2 spec.) and two species in genus Sulcacis (S. fronticornis (Panzer, 1809) – 2 spec. та S. nitidus (Fabricius, 1792) – 30 spec.). The material of the SMNH collection originates from the territory of Lithuania (seven samples donated by Wankiewicz, which are only known to have been collected before 1886 (Łomnicki, M. 1886), eleven specimens from Poland (Kraków, Puszcza Białowieska, Potok, Strzałków, Załuż) and 172 specimens from western part of Ukraine (Male Polissia (Chornushovychi and Ditkivtsi), Opillia (Monastyryska, Lviv: Pasiky), West Podillia Upland (Tulyn, Buchach), Roztochchia (Lviv itself and its surroundings: Pohulianka, Pasiky, Kryvchytsi, Lysynychi, Znesinnia, Zubra) Volynska Upland (Potorytsia), Ciscarpathians Upland (Drohobych, Kosiv, Ivano-Frankivsk), Margin Gorgany range (Novyi Mizun). 10 specimens of them are collected by J. Mazurek, including such species as C. boleti, C. micans and S. nitidus from Lviv (Pohulianka, Pasiky, Zubra) during the spring-summer period of the beginning of the 20th century (7.04, 19.05, 20.07, 21.07, 13.08). Twenty specimens collected by M. Łomnicki: C. castaneus (Potorytsia, 15.05), C. micans (Kosiv, 19.06), O. alni (Bystrets, 1867.06.28), O. glabriculus (Ivano-Frankivsk, 3.06, Buchach, 2.08). Only one specimen of C. lineatocribratus wich is stored in SMNH was collected by Lgocki in Poland (Potoc). Other specimens have no information about collector.