Edmund Reitter was best known as an expert on the beetles of the Palaearctic. He was an imperial advisor and editor of the “Wiener Entomologischen Zeitung”, (Vienna Entomological Gazette). In addition he was a member and honorary member of Deutsche Gesellschaft für allgemeine und angewandte Entomologie in Berlin, the Vereins für schlesische Insektenkunde in Breslau, the Museum Francisco-Carolinum in Linz, the Vereins für Naturkunde (Association for Natural History) in Austria, the Société entomologique de Russie in Saint Petersburg, the Société royale entomologique d’Égypte and the Nederlandse Entomologische Vereniging in Rotterdam.
As a corresponding member he worked with the Naturwissenschaftlichen Verein in Troppau, the Socíetas pro Fauna et Flora fennica in Helsinki und the Real Sociedad Española de Historia Natural in Madrid.
His beetle collection is preserved in the Natural History Museum in Budapest. It contains more than 30,000 species including 5,000 type specimens.