In 1912 he received an honorary doctorate from the University of Basel, largely based on his work involving caddisflies of Baltic amber.
[1] Throughout his career, he conducted extensive studies involving the faunistics, biology, systematics, and taxonomy of caddisflies and mayflies.
He conducted research on species native to Germany and also specimens collected by others from worldwide locations.
In 1964 his insect collection was donated to the Zoological Museum of Hamburg.
He is also the taxonomic authority of the mayfly families Oligoneuriidae (1914), Ecdyonuridae (1920), and Siphlonuridae (1920).