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

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

Case view of a Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington
It's only barely visible in one of my pictures, but I confirmed under the microscope that this one has a prosternal horn and the antennae are mid-way between the eyes and front of the head capsule.

I'm calling this one Pycnopsyche, but it's a bit perplexing. It seems to key definitively to at least Couplet 8 of the Key to Genera of Limnephilidae Larvae. That narrows it down to three genera, and the case seems wrong for the other two. The case looks right for Pycnopsyche, and it fits one of the key characteristics: "Abdominal sternum II without chloride epithelium and abdominal segment IX with only single seta on each side of dorsal sclerite." However, the characteristic "metanotal sa1 sclerites not fused, although often contiguous" does not seem to fit well. Those sclerites sure look fused to me, although I can make out a thin groove in the touching halves in the anterior half under the microscope. Perhaps this is a regional variation.

The only species of Pycnopsyche documented in Washington state is Pycnopsyche guttifera, and the colors and markings around the head of this specimen seem to match very well a specimen of that species from Massachusetts on Bugguide. So I am placing it in that species for now.

Whatever species this is, I photographed another specimen of seemingly the same species from the same spot a couple months later.
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.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Jmd123's profile picture
Oscoda, MI

Posts: 2474
Jmd123 on Jun 27, 2016June 27th, 2016, 12:49 pm EDT

Well, I'm sorry for all of the people who don't like this perfectly natural event, because I sure do!!! On Saturday night in Tawas City we came out of the bar after the band played their first set and the parking lot was FILLED with mayflies. I was of course delighted and told my buddies, "The fish are eating good tonight!!"

No matter how big the one you just caught is, there's always a bigger one out there somewhere...
Oldredbarn's profile picture
Novi, MI

Posts: 2600
Oldredbarn on Jun 27, 2016June 27th, 2016, 5:53 pm EDT
:) Hex-o-mania!!!

How cool is that?! They show up on doppler...
"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively

"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
Roguerat's profile picture
Posts: 456
Roguerat on Jun 29, 2016June 29th, 2016, 4:20 am EDT
The boob tube had a blurb last night, one of the tabloid shows after the national news..."Havana, Illinois suffers massive bug nightmare with 4-6" of 'mayflies' (HEXES!!!) piling up on bridges and roads." They made it sound like the bugs from hell were loose, lots of (heavily edited?) negative comments...

They showed the obligatory radar image of clouds of bugs that gave the impression of an approaching storm...

I guess its all in the eye of the beholder, all things considered.

Regarding Hexes in general, I'm tying some very traditional Michigan patterns lately, the Clark Lynn aka Spring Wiggler among them. Decades of history with these guys.


'Less is more...'

Ludwig Mies Vande Rohe
Gilsau's profile picture

Posts: 7
Gilsau on Jul 11, 2016July 11th, 2016, 2:31 pm EDT
check the linking codes bro! but thanks for sharing :D

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