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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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PaulRoberts
PaulRoberts's profile picture
Colorado

Posts: 1776
PaulRoberts on Dec 1, 2010December 1st, 2010, 4:09 am EST
Below is my large cranefly tie. It was for trout in a NY Finger Lakes stream in which craneflies, among other things, were “food”.

One of my journal entries covering that stream:



Stomach pump results from a 17” brown trout with two cranefly types at the top (the translucent gold-tan and the olive). Also hellgrammites, and a scud (the orange due to digestion):


My tie:


Talk about simple to tie: An inch of poly yarn from a craft store tied on as a "tail", melted and rolled with fingers to a taper while still hot. Anterior end dubbed with slightly darker shade of same yarn. The hook is a Mustad 3906.

If I were to tie these now, I'd experiment tying them "wacky". That's a rigging method used for plastic worms and bass in which the hook is in the center, not distal. This allows the worm to be twitched. It's VERY effective. This fly begs for that.

Lemme know what you come up with. Always fun to hear about good patterns and scenarios.
JAD
JAD's profile picture
Alexandria Pa

Posts: 362
JAD on Dec 1, 2010December 1st, 2010, 8:05 am EST
Good looking fly Paul, that fish that you pumped sure was feeding .

Best
John

They fasten red (crimson red) wool around a hook, and fix onto the wool two feathers which grow under a cock’s wattles, and which in colour are like wax.
Radcliffe's Fishing from the Earliest Times,
PaulRoberts
PaulRoberts's profile picture
Colorado

Posts: 1776
PaulRoberts on Dec 1, 2010December 1st, 2010, 12:25 pm EST
Yes, those browns were often very fat. They used the mid reaches of a stream that cranked out large food items. This is true on many if not most brown trout waters. Such stretches are marginal in temperature in summer, and this particular one lost a lot of water too. But spring fishing could be pretty good, Water levels played a big role. Some years I could find those browns into June. But usually it (daytime fishing) was over by mid May.
Martinlf
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Moderator
Palmyra PA

Posts: 3047
Martinlf on Dec 1, 2010December 1st, 2010, 12:52 pm EST
Thanks for sharing this one, Paul. I'm going to give it a try. I may try your whacky rig too.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
PaulRoberts
PaulRoberts's profile picture
Colorado

Posts: 1776
PaulRoberts on Dec 1, 2010December 1st, 2010, 2:52 pm EST
Neat, Louis. Curious how it'll work. Wacky rigged worms are usually weighted, sometimes at each end. Something to experiment with.

I've been doing some stream sampling in local streams of late. I have to break some ice to get to the substrate but am finding stuff of course -despite what some angling writers say about winter trout streams. Some are "cranefly" larvae -watersnipe (Athericidae) and cranefly (Tipulid) larvae. The Tipulid was the same gold one I'd found in that NY stream (Hexatoma) and illustrated in the journal entry above. In the still water of my catch container they both swim in the same manner -flipping each end together, up and then down, ... in a writhing effort like a hyper-wacky rig. Not sure if they do this when dislodged in current though.
FredH
FredH's profile picture
Lake Charles , Louisiana

Posts: 108
FredH on Dec 2, 2010December 2nd, 2010, 1:05 am EST
Paul do they move like a mosquito larve? If so using a combination of rubber legs (from bass poppers)and dubbing could make for a deadly pattern rigged wacky.Hmm...... Great , now I have another project to add to my tying list.
PaulRoberts
PaulRoberts's profile picture
Colorado

Posts: 1776
PaulRoberts on Dec 2, 2010December 2nd, 2010, 3:25 am EST
Yes, like mosquito larvae but not side to side, and slower more cumbersome. Regardless, I think the "wacky" twitch is all that would be needed to add deadly 'life' to the fly. Underwater most materials are too well supported and will be stiff. That and proper weighting should go somewhere. Play in the sink and see what you can come up with.

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