author
O. A. (Oskar Augustus) Johannsen
1870–1961
A leading American entomologist and teacher, this author devoted decades to the study of flies and other insects, producing careful scientific works that remained useful for years. His books reflect both field knowledge and a talent for clear, systematic explanation.
1 Audiobook
Handbook of Medical Entomology
by William A. (William Albert) Riley, O. A. (Oskar Augustus) Johannsen
About the author
Born in Davenport, Iowa, in 1870, Oskar Augustus Johannsen became an American entomologist best known for his work on Diptera, the order of insects that includes flies. He studied at the University of Illinois and Cornell University, and his career became closely linked with Cornell and insect research in the United States.
Johannsen wrote and contributed to a wide range of scientific books and papers, including works on aquatic insects, fungus gnats, and medical entomology. His writing was practical and detailed, shaped by the needs of both researchers and students.
He died in Ithaca, New York, in 1961. Although he is remembered mainly in specialist circles, his publications helped build the foundations of modern entomological study in North America.