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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.

Dorsal view of a Grammotaulius betteni (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This is a striking caddis larva with an interesting color pattern on the head. Here are some characteristics I was able to see under the microscope, but could not easily expose for a picture:
- The prosternal horn is present.
- The mandible is clearly toothed, not formed into a uniform scraper blade.
- The seems to be only 2 major setae on the ventral edge of the hind femur.
- Chloride epithelia seem to be absent from the dorsal side of any abdominal segments.
Based on these characteristics and the ones more easily visible from the pictures, this seems to be Grammotaulius. The key's description of the case is spot-on: "Case cylindrical, made of longitudinally arranged sedge or similar leaves," as is the description of the markings on the head, "Dorsum of head light brownish yellow with numerous discrete, small, dark spots." The spot pattern on the head is a very good match to figure 19.312 of Merritt R.W., Cummins, K.W., and Berg, M.B. (2019). The species ID is based on Grammotaulius betteni being the only species of this genus known in Washington state.
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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Portland, OR

Posts: 2
Jcrowther1 on Sep 19, 2016September 19th, 2016, 2:46 pm EDT
Hello folks,

I'm new here, but have been fly fishing for trout for nearly a decade. I have a good buddy who is turning 40 this winter and me and some of the boys want to take him on a trip to celebrate once the weather starts to warm up a bit. Late March is looking like the time we will aim for.

We are open to traveling almost anywhere in the continental US, so what are some destinations where we could have an enjoyable time fishing in beautiful scenery that time of year and hopefully catch a few fish, too!

Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Sep 19, 2016September 19th, 2016, 4:19 pm EDT
If late March is your time table for the trip I would suggest the South Holston near Bristol, TN. It is a tailwater river with relatively consistent water temperatures. I personally have never fished there but a number of good friends have and they told me the BWO's are fantastic in March. Check out Altamount Anglers.

I sent you a PM with the link to Altamount Anglers.
Catskill fly fisher for fifty-five years.
Portland, OR

Posts: 2
Jcrowther1 on Sep 20, 2016September 20th, 2016, 2:13 pm EDT
Great suggestion, thanks!

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