Mossmites are small micro-arthropods which live in the soil. In a number of ongoing Alterra-projects and checks of the Plant Disease Control Unit nine mossmite species have been recorded which were not yet included in the recently published Dutch checklist, nor in the supplements. The total number of mossmite species in the Netherlands is now 336. More species are to be expected in underexplored areas and habitats, some of which are to be investigated in the near future.