A complete list is presented of all spiders, opilionids and pseudoscorpions collected during inventories with pitfall traps in two reserves in the province of Drenthe, the Netherlands, viz. the peat-bog reserve ‘Bargerveen’ and the nearby ‘Oosterbos’. The relative abundances for the different habitat types (coniferous forest, deciduous forest, Erica/Molinia-vegetation, wet Sphagnum-vegetation, partly inundated Sphagnum-vegetation) are given as well as the total number of specimens collected.