Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana

Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Two major forks of this grayling stream come together in this pretty pool.

From the Chena River in Alaska

Stream photos

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Onocosmoecus (Great Late-Summer Sedge) Caddisfly Larva Onocosmoecus (Great Late-Summer Sedge) Caddisfly Larva

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.

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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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Unidentified Mayfly Kansas City, MO

Pdcox has attached this picture to aid in identification. The message is below.

Pdcox
Kansas city

Posts: 12

Pdcox on Apr 15, 2020April 15th, 2020, 5:11 am EDT

Well this guy about blew my mind. No idea mayflies were in man made lakes. This bug was about 3/4 inch body length. Found yesterday, James Reed Park, cloudy, windy, 48 degrees. I have enhanced the green of the eyeballs a bit in Photoshop so they stand out, but could definitely see the color au natural.
Any help appreciated

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Apr 15, 2020April 15th, 2020, 9:10 am EDT

Hi Paul-

I believe this female subimago to be Stenonema femoratum.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Pdcox
Kansas city

Posts: 12

Pdcox on Apr 15, 2020April 15th, 2020, 9:28 am EDT

Thank you sir

Pdcox
Kansas city

Posts: 12

Pdcox on Apr 16, 2020April 16th, 2020, 2:25 am EDT

Also, what clued you in to this being female?

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Apr 16, 2020April 16th, 2020, 5:24 am EDT

The clues to it being a female were the absence of male claspers sticking out beyond the abdomen, in combination with the smaller compound eyes characteristic of a female.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com