Franciscus J. M. HEYLAERTS

Franciscus J.M. Heylaerts (1831–1916) was a Dutch entomologist who specialised in Lepidoptera (most notably Psychidae world species) and Coleoptera. By profession he was a physician. His collection of Psychidae is held by Rijksmuseum Natural History, Leiden.

(source Wikipedia anglais https://en.wikipedia.org/wiki/Franciscus_J._M._Heylaerts)