Launcelot Harrison

Launcelot Harrison (13 July 1880 - 20 February 1928) was an Australian zoologist and entomologist who held the Challis Chair in Zoology from 1922 until his untimely death from a cerebral haemorrhage. He married writer Amy Mack on 29 February 1908. His 1915 study found that host and parasite body sizes tended to positively co-vary; this finding was dubbed Harrison's rule. During World War I he served as an advising entomologist (ranked Lieutenant) to the British Expeditionary Force in Mesopotamia. His students included Claire Weekes, the first woman to earn a doctorate at the University of Sydney.