Not all springtails from the Netherlands are listed in the key. Animals where I have no pictures of are not listed.
It works like this: you see two collect pictures with characteristics that apply, Click on the picture that corresponds to your own animal. You will then be redirected to the following two pictures, until you come upon the requested species or group. If you come out on a photo with an animal that is not entirely your animal then it is probably a kind where I don't have a picture from.