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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.

Ventral view of a Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Larva from the Yakima River in Washington
With a bit of help from the microscope, this specimen keys clearly and unsurprisingly to Hydropsyche.
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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Stonefly Genus Amphinemura (Tiny Winter Blacks)

Where & when

In 96 records from GBIF, adults of this genus have mostly been collected during May (36%), April (27%), and June (26%).

In 9 records from GBIF, this genus has been collected at elevations ranging from 480 to 3264 ft, with an average (median) of 2917 ft.

Genus Range

Specimens of the Stonefly Genus Amphinemura

1 Female Adult

Start a Discussion of Amphinemura

Stonefly Genus Amphinemura (Tiny Winter Blacks)

Taxonomy
Species in Amphinemura: Amphinemura varshava
15 species (Amphinemura alabama, Amphinemura apache, Amphinemura appalachia, Amphinemura banksi, Amphinemura delosa, Amphinemura linda, Amphinemura mexicana, Amphinemura mockfordi, Amphinemura mogollonica, Amphinemura nigritta, Amphinemura puebla, Amphinemura reinerti, Amphinemura texana, Amphinemura venusta, and Amphinemura wui) aren't included.
Genus Range
Common Name
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