The paper presents the approach of researches on the species Tachinus laticollis Gravenhorst, 1802 (Coleoptera, Staphylinidae, Tachyporinae) identified as a new species for the fauna of the Republic of Moldova. The tachiporin specimen was collected at 05.03.2016 in the cattle manure in the pasture from Cocieri village, Dubasari District. The principal method of collecting was extraction by applying the flotation method. In the context of this study, the paper refers in more detail to the species in the collection of Staphylinidae within the Museum of Entomology of the Institute of Zoology, during the applied research (2015-2017). Also, to the analysis of rove beetles material extracted from samples accumulated during study, data on the systematic classification of the species, geographical distribution, bioecology, morphology, illustrative presentation.