[in portuguese] Fábio Leoni Werneck was born in Rio de Janeiro, Brazil, on 13 of August, 1894. In 1919 he enrolled in medicine at the National College of Medicine and, in 1920, enrolled in pharmacy at the College of Pharmacy and Odontology of Rio de Janeiro. He earned his Doctor of Medicine (M.D.) in 1936, following the defense of his thesis titled"Contribuição ao conhecimento dos Mallophagos encontrados nos mamíferos sul-americanos". As a student, he frequently assisted in the laboratories of Zoology, Parasitology and Histology of the College of Medicine and in the department of Mineral and Analytical Chemistry at the Polytechnical School. He also worked in the Analytical Chemistry laboratory of the Department of Geology and Mineralology, under the direction of Orville Derby. From 1919 to 1931 he worked in the pharmaceutical profession as managing technician of the Werneck Laboratory, which was owned my members of his family. He joined the Instituto Oswaldo Cruz (IOC) in 1930, as an unpaid assistant in the Laboratory of Entomology, which was under the direction of Angelo Moreira da Costa Lima. Between 1931 and 1932 he frequented the Course of Application of the IOC, having gotten diploma of perfectioning and specialization. At this time, he published his first work, intitled"Nota prévia sobre uma nova espécie de Mallophaga (Gyropidae)î. Soon after the conclusion of the course he was appointed Associate Head of laboratory, serving in this role from 1933 to 1936, after which he was promoted to Head of the Laboratory. In 1951 he was appointed Professor of Entomology in the Instituto Oswaldo Cruz. Werneck undertook some scientific expeditions to the interior of Brazil collecting sucking and chewing lice from mammals and birds, which was his area of specialty. In 1945 he served as instructor of an applied course on Plague, for the National Department of Health, held in Recife, Pernambuco State. In 1943 he also received scholarship of the John Simon Memorial Guggenheim Foundation to study at Stanford University. In 1953 he received a scholarship from the ìConselho Nacional de Pesquisasî (CNPq) to travel to Africa to collect specimens, and to study the chewing and sucking lice collections in European museums. Werneck was the author of two books and more than sixty scientific articles. He has been honored by his colleagues with the generic patronym; Werneckiella Eichler, 1940 and the species Ornithonyssus wernecki (Fonseca, 1935); Strongylocotes wernecki Guimares & Lane, 1937; and Pariodontis wernecki Lima, 1940. Fábio Leoni Werneck died on 12 January, 1961
