Shop › A Key to the Adults of the British Emphemeroptera. SP47. JM Elliott & UH Humpesch Image 1 of 1 A Key to the Adults of the British Emphemeroptera. SP47. JM Elliott & UH Humpesch £10.00 Add To Cart Added! You Might Also Like Freshwater Algae of Cumbria - SP72 The Phytoplankton of Windermere - SPEC10 Identification of Genera of Chironamid Pupal Exuviae - SPEC 13 New Key to Freshwater Bryozoans of Britain & Ireland - SP63 Crustacea Malacostraca - SP52