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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.

Lateral view of a Onocosmoecus (Limnephilidae) (Great Late-Summer Sedge) Caddisfly Larva from the Yakima River in Washington
This specimen keys pretty easily to Onocosmoecus, and it closely resembles a specimen from Alaska which caddis expert Dave Ruiter recognized as this genus. As with that specimen, the only species in the genus documented in this area is Onocosmoecus unicolor, but Dave suggested for that specimen that there might be multiple not-yet-distinguished species under the unicolor umbrella and it would be best to stick with the genus-level ID. I'm doing the same for this one.
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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Caddisfly Species Neophylax fuscus (Small Dot-Wing Sedges)

According to Swisher and Richards in Selective Trout this caddisfly is very important in the Midwest.

Where & when

Time of year : October to November

In 8 records from GBIF, adults of this species have been collected during October (50%), September (38%), and August (13%).

In 4 records from GBIF, this species has been collected at elevations of 525, 823, 1001, and 1030 ft.

Species Range

Hatching behavior

Time of day : Late morning through afternoon


Start a Discussion of Neophylax fuscus

References

Caddisfly Species Neophylax fuscus (Small Dot-Wing Sedges)

Taxonomy
Species Range
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