Hamilton Herbert Druce
Hamilton Herbert Charles James Druce (1869 – 21 June 1922) was an English entomologist who specialised in Lycaenidae and to a lesser extent Hesperiidae. He is not to be confused with his father, the English entomologist Herbert Druce (1846–1913) who also worked on Lepidoptera. H. H. Druce was a Fellow of the Zoological Society of London and of the Entomological Society of London. The H. H. Druce collection was sold to James John Joicey and is now in the Natural History Museum in London.