Keywords: FMIB 44107 Mayflies, Perfect, and Embryo.jpeg check categories 22 August 2015 2 Mayflies Perfect and Embryo Subject Mayflies Tag Insects 1851 Cite book Frank Forester's Fish and Fishing of the United States and British Provinces of North America Herbert Henry William New York NY Stringer Townsend 1851 273 Creator Henry William Herbert PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 44107 Images from the Freshwater and Marine Image Bank to check Henry William Herbert Ephemeroptera |