Scudder, S. H. 1877b. The first discovered traces of fossil insects in the American Tertiaries. Bulletin of the United States Geological and Geographical Survey of the Territories 3:741-762. PDF

Scudder, S. H. 1878. The fossil insects of the Green River shales. Bulletin of the United States Geological and Geographical Survey of the Territories 4:747-776. PDF

Notes: Date of publication from Evenhuis (1994b).