In this publication a new key to the Dutch Orthoptera is presented. Furthermore the results of the most recent atlasproject (2006-2014) are compared to the first project (1990-1995). The fauna has changed considerably. A few species, like Decticus verrucivorus and Ephippiger diurnus, have declined further. Gampsocleis glabra and Tetrix bipunctata were thouhjt to be extinct, but were rediscovered recently.