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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.

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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Mayfly Family Metretopodidae (Pseudo-Gray Drakes)

The mayflies of this family are large and elegant as adults and among the fastest-swimming of all mayfly species as nymphs. Sadly only one species (Siphloplecton basale) has been reported to produce fishable hatches, and even those are exceedingly rare.

Where & when

In 74 records from GBIF, adults of this family have mostly been collected during June (35%), July (20%), April (14%), August (12%), March (9%), and May (7%).

In 349 records from GBIF, this family has been collected at elevations ranging from -30 to 3524 ft, with an average (median) of 984 ft.

Family Range

Specimens of the Mayfly Family Metretopodidae

1 Male Dun
1 Male Spinner
9 Nymphs

Discussions of Metretopodidae

S. basale on Clarks Creek, PA
1 replies
Posted by Wiconisco37 on Feb 4, 2009 in the species Siphloplecton basale
Last reply on Jun 10, 2009 by Martinlf
they were discovered on Clarks Creek by a man from halifax, PA
i dont know what their numbers were like thgough

Start a Discussion of Metretopodidae

Mayfly Family Metretopodidae (Pseudo-Gray Drakes)

Taxonomy
Genus in Metretopodidae
Metretopus
1
1
Siphloplecton
10
38
Genus in Metretopodidae: Metretopus, Siphloplecton
Family Range
Common Name
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