**Female Epeorus vitreus (Sulphur) Mayfly Spinner Pictures**

Mayflies

Caddisflies

Stoneflies

Classification

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Heptageniidae (March Browns, Cahills, Quill Gordons)

» Genus Epeorus (Little Maryatts)

» Species vitreus (Sulphur)

I collected this one as a dun, and she molted into a spinner in my room.

This mayfly was collected from unknown on May 26th, 2004 and added to Troutnut.com on January 25th, 2006.

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Female Epeorus vitreus (Sulphur) Mayfly Spinner from unknown in Wisconsin

AuthorTroutnut

CameraOlympus C740UZ

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AuthorTroutnut

CameraOlympus C740UZ

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AuthorTroutnut

CameraOlympus C740UZ

Recent Discussions of this Spinner

Another vitreus

Posted by GONZO on Oct 28, 2008

This looks like another darkish female.

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Jargon Defined:

Dun: Mayflies have two adult stages. They first emerge from the water as duns (scientifically known as the subimago stage). They then molt into the spinner (imago) stage, in which they mate and die. Sometimes the word "dun" is confusingly used to refer to a brownish gray color in fly tying materials.

Spinner: There are two winged stages of adult mayflies. They emerge from the water as duns, molt on land (usually) into their fully mature stage, spinners. As spinners, they mate, lay eggs, and die.