“Notes on a Collection of Erythroneura and Hymetta (Eupterygidae) Chiefly from Illinois, With Descriptions of New Forms”. Illinois Natural History Survey Bulletin 15, no. 1-9 (April 30, 1924): 39–44. Accessed May 19, 2024. https://iopn.library.illinois.edu/journals/inhs/article/view/300.