These papers consist of incoming and outgoing correspondence mostly documenting Oman's career as a research entomologist at the USDA and his study of leafhopper systematics.
Most of the letters were exchanged between Oman and professional colleagues and concern the identification of specimens. Correspondence after 1950 was created primarily by
David A. Young, Jr., and James P. Kramer, two USDA Homopterists who assumed responsibility for taxonomic studies after Oman's work became more administrative in nature.
Paul Wilson Oman (1908-1996), an entomologist and specialist on leafhopper taxonomy, was educated at the University of Kansas (A.B., 1930; A.M., 1935) and the George
Washington University (Ph.D., 1941). In 1930, Oman joined the United States Department of Agriculture (USDA) as a Junior Entomologist with the Bureau of Entomology and Plant
Quarantine. He remained with the USDA, in various research and administrative posts, until 1967 when he retired to join the faculty of Oregon State University. Oman served
in the United States Army during World War II and the Korean War, conducting studies on medical entomology and the biological control of insects.
The papers of James P. Kramer consist of incoming and outgoing correspondence documenting his career at the USDA from 1957 to 1987. Most of the letters concern the
identification of specimens, but reviews of scientific papers and information about professional meetings are also included. A small amount of earlier correspondence, from
1937 to mid-1957, was created by Kramer's predecessors, Paul Wilson Oman and David A. Young, Jr. All records concern research on Homoptera done at the USDA.
James P. Kramer (1928-2011), a United States Department of Agriculture (USDA) Research Entomologist, received his B.S. from Beloit College (1950), M.S. from the University
of Missouri (1952), and his Ph.D. from the University of Illinois (1961). In 1957, Kramer joined the staff of the Insect Identification and Parasite Introduction Section,
Entomology Research Branch, USDA, located in the United States National Museum. After 1972, the Branch became the Systematic Entomology Laboratory. Kramer remained with the
USDA until his retirement in 1987, studying the Homoptera suborder Auchenorrhyncha, with special emphasis on New World leafhoppers (Cicadellidae) and planthoppers (Fulgoridae).