. Elementary entomology . Fig. 123. May-flies {Ephemera varia Etn.) /, 2, side and back views of nymph; 3^ 4, side and back view of adult male {Siphlurus alieniaius Say); j, 6, side and back view of nymph; 7, side view of adult male. (After Needham) 96

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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912