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 British Fresh and Brackish Water Gastropods - SP13 Key to Freshwater Fish of Britain & Ireland Guide to British Freshwater Macroinvertebrates for Biotic Assessment - SP67 Identification of Genera of Chironamid Pupal Exuviae - SPEC 13 Measurement of Stream Water Temperature and Biological Applications to salmonid fishes, grayling and dace - OP29