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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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Troutnut.com User Grabbit (Ron Greenen)

Troutnut.com User Grabbit (Ron Greenen)

Real Name
Ron Greenen
Columbus, OH
Biography & Thoughts
I've been a photographer for 24 years now. I started my journey with a string and a Agfa medium format camera fixed upon a twenty pound tripod. The string had a series of knots tied into it at one foot intervals... it told me focal length from the film plane. Thinking back it was a crude way of doing things before I could afford a 35mm SLR. Come to think of it I spent every spare dollar I had on film, paper, toner, and fixer. I would go into the darkroom and get lost in a project... I miss those days. Now I work with the Nixon digital stuff... what fun stuff and WHAT FEEDBACK! Today, I pack a few lenses, body, and flyboxs into a waterproof Simms backpack and a monopod which I carry onto the river. Sometimes I'll use the monopod as a wading staff when the need arises. Over the past four years I have produced some wonderful work on the water. Maybe someday I will put the photo's into a collection in the form of a book... but for now I just share them with friends and other fly fishing buds. Regardless of what I do with these images I am pleased with them and thats all that really matters. I have been asked to guide by a few outfitters and have turned down the offer, I'm afraid I would yell at my sports and fishing would no longer be fun. I lack the ability to be patient. I am self taught at everything... hobbies and career. I tend to fish in water that holds big fish, big quiet pools with fish that are wickedly tough to fool... My life has followed that same philosophy. For the time being it keeps me moving forward. I wrap All the flies I fish with. I like thorax style tied the proper way. I am working on tube spey flies for salmon and steelhead, so many options there. I love cane that is done the right way. Spey casting is something I just started three years ago. I really find it a relaxing sport. lets face it working upstream with a dry fly is not relaxing... it is hard work and you must stay amped at all times to score. Well enough of this.... I need to get to my vise the trico's are not far away and my box is not ready for such an event.
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Fishing with nymphs is for fat little kids... man up and throw a dry.

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