Abstract
One new species of Triphleba Rondani and eight new species of Megaselia Rondani are described from Montseny Natural Park (mainland Spain). The new species are Megaselia arbuciensis García-Romera sp.nov., Megaselia barrientosi García-Romera sp. nov., Megaselia callunae García-Romera sp. nov., Megaselia carminis García-Romera sp. nov., Megaselia ivanis García-Romera sp. nov., Megaselia longianalis García-Romera sp. nov., Megaselia montseniensis García-Romera sp. nov., Megaselia sarae García-Romera sp. nov., Triphleba beatricis García-Romera sp. nov.