The types of species of Staphylinidae (Coleoptera) housed in the collection of the Entomology Department of Museo de La Plata were examined and listed. These types belong to 46 species assigned to the following subfamilies: Aleocharinae (6 species, 17 types), Megalopsidiinae (1, 4), Osoriinae (4, 19), Oxytelinae (5, 19), Paederinae (12, 32), Proteininae (1, 1), Pselaphinae (9, 17), Staphylininae (5, 15), Steninae (2, 4) and Tachyporinae (1, 20). Types herein treated belong to 34 species described by Bernhauer, eight by Raffray and four by Bruch. Complete information is given for each type, including reference to original description, label data, and preservation condition. Two lists were added in order to support future research: one for specimens labelled with manuscript names, and another for specimens labelled as types but not included in the type series in the original publications.