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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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DUBBN
DUBBN's profile picture
Colorado

Posts: 47
DUBBN on Dec 24, 2012December 24th, 2012, 12:50 am EST
Four days off for the Holiday left me time to BBQ ribs and start filling my fly Boxes. The first three patterns I will be using on a local Tailwater (Frying Pan) this morning. The rest will be used in a few weeks/Month.














It's OK to disagree with me. I can not force you to be right.
Kschaefer3
Kschaefer3's profile picture
St. Paul, MN

Posts: 376
Kschaefer3 on Dec 24, 2012December 24th, 2012, 4:17 am EST
Very nice flies! What sizes are they? Good luck fishing, let us know how it goes.
DUBBN
DUBBN's profile picture
Colorado

Posts: 47
DUBBN on Dec 24, 2012December 24th, 2012, 1:35 pm EST
The top two flies are 20, and 22 I did very well with them today. The rest are 14's and 10's I wont use them too much till Spring













I had alot of fun today.
It's OK to disagree with me. I can not force you to be right.
Oldredbarn
Oldredbarn's profile picture
Novi, MI

Posts: 2600
Oldredbarn on Dec 24, 2012December 24th, 2012, 7:19 pm EST
Hey fella you are breaking my heart here! :) That Bow looks sweet.

You need to pass on some recipes...I'm curious, what are you using on those abdomens on those last three flies?

The river looks good...We just finally got a couple inches of snow this evening to make it look like Christmas and the temp dropped a bit.

You can PM me if you wish to save some secrets...:)

Spence
"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
DUBBN
DUBBN's profile picture
Colorado

Posts: 47
DUBBN on Dec 25, 2012December 25th, 2012, 3:00 am EST
Spence, no secrets. The abdomens are Midge Tubing with wire or Krystalflash inserted as a core. I really doubt that this technique makes a bit of difference to the fish, but I enjoy using it. Ribbing the abdomen with wire after midge tubing has been applied would work just as well.

It's a technique that works well for me on patterns as small as 22 and 24's aswell

It's OK to disagree with me. I can not force you to be right.

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