Hortense Butler Heywood was a well-known entomologist who was born and raised in Iowa. She co-authored the book, Handbook of the Dragonflies of North America and is also known for her detailed illustrations of specimens. The digital collection contains biographical information, college papers, course notes, photographs, specimen drawings, correspondence, reports, articles, book reports, scientific correspondence and articles, and glass specimen slides. Items for the digital collection were selected as representative of Heywood's development as a scientific illustrator, her education in science, her relationships with other scientists (both men and women), her civic engagement, and her contributions to entomology. The complete collection is available at the Iowa State University Library Special Collections and University Archives.