Arnold Friedrich Victor Jacobi (31 January 1870 – 16 June 1948) was a German zoologist and ethnologist who worked at the Forest Academy in Tharandt and later served as director of the Dresden Museum.
He received his schooling at the Thomasschule in Leipzig and took an interest in zoology studying under Rudolf Leuckart and William Marshall as well as in geography, ethnography and anthropology.
He became a scientific assistant in the health department in Berlin and then moved to a chair in zoology at the Forest Academy in Tharandt, succeeding H. Nitsche, becoming a full professor in 1904.
He collected and described numerous taxa of insects (particularly the cicadas),[1] birds,[2] and other groups, while also taking an interest in biogeography.
[3][4] Jacobi signed the Vow of allegiance of the Professors of the German Universities and High-Schools to Adolf Hitler and the National Socialistic State in 1933, but there is no evidence that he became a party member.