Hans K C Andreae, analytical chemist and naturalist, studied chemistry, physics, mineralogy, petrography, geology and botany at the University of Marburg, Germany. He continued his studies in chemistry, physics and mineralogy at the University of Tuebingen and was awarded a doctoral degree (cum laude) in chemistry in July 1913. His inaugural dissertation was entitled Ueber die bei nitrirung von ortho- und parazophenetol entstehenden nitrokoerper und deren derivate. He came to South Africa that same year to relieve a lung complaint and worked as an assistant analytical chemist to Dr H W Rudolf Marloth* in Cape Town. When World War I (1914-1918) broke out he was listed as an enemy subject and only in July 1919 was he released on parole to Cape Town. The authorities again kept an eye on him during World War II (1939-1945).
Andreae assisted Marloth also in his botanical work, collecting plants for him mainly in the Cape Province. He was, however, mainly interested in beetles. As a member of the Cape Natural History Club during 1934-1935 he was the club consultant on beetles and served on the club committee. He made a collection of South African species and in 1949 was appointed honorary curator of Coleoptera in the South African Museum, Cape Town, a position he held until his death. He had a wide knowledge of the taxonomy of South African beetles, published a few papers describing new species, and revised two families.
In 1963 Andreae qualified to be honoured by the University of Tuebingen with a renewed doctoral diploma, in recognition of his 50 years of post-doctoral work. The ceremony took place at the South African Museum only in January 1965, as the university initially did not know of his whereabouts.