G. Mann collected several species of insects at elevetions of about 2 400 m and 3 000 m in the Drakensberg range. His specimens were presented to the South African Museum in Cape Town in 1897, via Dr H.W. Rudolf Marloth*. Three of the species proved to be new.
The donor was probably Mr Gother Charles Maclear Mann, youngest son of William Mann* of the Royal Observatory, Cape of Good Hope. He was born on 13 January 1869 in Cape Town, educated at the Diocesan College there, and became general manager and secretary of the South African Association for the Administration and Settlement of Estates. In 1903 he became a member of the South African Philosophical Society and remained a member for some time after it became the Royal Society of South Africa in 1908. His hobbies were sport and mountaineering. He died on 3 April 1933.