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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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Report at a Glance

General RegionNew Hampshire's Lake Region
Specific LocationMountain Streams
Fish CaughtLooking for Brookies and Rainbows

Details and Discussion

Andover, MA/ Andover NH

Posts: 18
CamWolf1313 on Jun 15, 2008June 15th, 2008, 1:51 pm EDT
I have a lake-house in Andover NH and there are trout in the lake but i have always loved stream fishing. I was wondering if anybody had suggestions where to fish and using what types of flies? Any little bit of information for any part of New Hampshire because i don't mind driving for fish.
"Clear your mind of everything but the fish and the fly and you will be in the right mind frame to land it"
Billy Berger.
Posts: 15
Vermonter on Jun 19, 2008June 19th, 2008, 1:47 am EDT
Connecticut river!!!!!!!!!!!
Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Jun 25, 2008June 25th, 2008, 1:59 am EDT
I don't know where Andover is in relation to Conway and Gorham but you could try the Swift river which flows west to east and joins the Saco near Conway. Then there is the Ellis River near Jackson, the Peabody River near Mt. Washington, and the Androscoggin River which starts up in Errol and flows south through Milan, Berlin, and Gorham before it hooks back into Maine.
Catskill fly fisher for fifty-five years.
Cortland Manor, NY

Posts: 139
Mcjames on Jun 25, 2008June 25th, 2008, 5:50 am EDT
what about Adironacks? is that drivable
I am haunted by waters
Andover, MA/ Andover NH

Posts: 18
CamWolf1313 on Jun 26, 2008June 26th, 2008, 3:34 pm EDT
For where I am in new hampshire the Adironacks on about a 3 hour drive but they are close to some relatives and i am planning to take a trip this summer.
"Clear your mind of everything but the fish and the fly and you will be in the right mind frame to land it"
Billy Berger.
Posts: 1
Zhoule on Jul 22, 2008July 22nd, 2008, 9:42 am EDT

Dude, check out the Connecticut river in Pittsburgh NH. The "Trophy Stretch" is particularly attractive from late April (beware of deep water) to october.

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