Francis "Frank" Milburn Howlett (5 January 1877 – 20 August 1920) was a British entomologist who served as a Second Imperial Entomologist and as Imperial Pathological Entomologist in India. He specialized in insects (mainly Diptera - sandflies) and parasitic ticks of medical and veterinary importance. A major discovery by him was the attractant methyl eugenol and its effect on flies of the genus Bactrocera.