Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Stream photos

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Perlodidae (Springflies and Yellow Stones) Stonefly Nymph Perlodidae (Springflies and Yellow Stones) Stonefly Nymph

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington

This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.

11 Recently Added Photos

27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.

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Female Epeorus vitreus (Sulphur) Mayfly Dun Pictures

Lateral view of a Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Dun from the Namekagon River in Wisconsin

Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Dun from the Namekagon River in Wisconsin

Dorsal view of a Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Dun from the Namekagon River in Wisconsin

Ventral view of a Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Dun from the Namekagon River in Wisconsin

This mayfly was collected from the Namekagon River in Wisconsin on June 8th, 2005 and added to Troutnut.com by Troutnut on May 26th, 2006.

Discussions of this Dun

Not Maccaffertium, E. vitreus female

1 replies

Posted by GONZO on Oct 19, 2006

Last reply on Oct 19, 2006 by Troutnut

This one seems to have slipped by. It is a classic Pink Lady (Epeorus vitreus female)--unmarked wings, dark humeral vein, upward slanting (weak) basal costal crossveins, and 1st two tarsal segments nearly equal.

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