Alexander Macleay was a Scottish entomologist and politician born in 1767. He is best known for his work in natural history and his role as the first Colonial Secretary of New South Wales, Australia. Macleay contributed significantly to the study of insects and was a prominent figure in the early scientific community in Australia. Macleay's most notable achievement was the establishment of the Australian Museum in Sydney, where he served as the first curator. He collected and classified numerous species, helping to expand knowledge of Australian fauna. His legacy continues to influence the fields of entomology and natural history.