Penestragania apicalis is a leafhopper (Cicadellidae, subfamily Iassinae) native to the Nearctic first confirmed to have spread to Europe in 2012 and soon found in Austria, France, Germany and Switzerland. It is monophagous on honeylocust, Gleditsia triacanthos. For more information see https://opendata.uni-halle.de/bitstream/1981185920/94181/1/cicadina_volume_13_245.pdf .
My observations of this species: https://www.inaturalist.org/observations?place_id=any&taxon_id=1205591&user_id=sascha_n&verifiable=any

Macropsis fumipennis is a leafhopper (Cicadellidae, subfamily Eurymelinae) native to the Nearctic and I am not familiar with any reports of this species occuring in Europe. It is monophagous on honeylocust, Gleditsia triacanthos.
My presumed observations of this species: https://www.inaturalist.org/observations?place_id=any&taxon_id=224324&user_id=sascha_n&verifiable=any