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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Isoperla (Stripetails and Yellow Stones) Stonefly Adult Isoperla (Stripetails and Yellow Stones) Stonefly Adult

Dorsal view of a Isoperla (Perlodidae) (Stripetails and Yellow Stones) Stonefly Adult from Mystery Creek #308 in Washington

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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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Definition of 'mesopleuron'

Mesopleuron: The side of the insect mesothorax, and the part to which the fore wings are attached in mayflies.

These other words reference the same concept: mesopleura, mesopleural.

Hex MayfliesHexagenia limbata

Definition of 'mesopleuron'

Definition of 'mesopleuron'

Hex Mayflies
Hexagenia limbata