Yellow May Dun

Heptagenia est un genre d'insectes appartenant à l'ordre des éphéméroptères.

The Fly-Fisher's Entomology, Illustrated by Coloured Representations of the Natural and Artificial Insect and Accompanied by a Few Observations and Instructions Relative to Trout-and-Grayling Fishing, first published in 1836 by Alfred Ronalds (1802–1860), was the first comprehensive work related to the entomology associated with fly fishing. Although the work was Ronalds' only book, it was published in 11 editions between 1836 and 1913 and has been extensively reprinted in the last 100 years. Synopsis The Fly-fisher's Entomology is the archetype fly-fishing how-to book.

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