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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 Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington
I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.
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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Cherylkorca has attached these 11 pictures to aid in identification. The message is below.
Cherylkorca
Cherylkorca's profile picture
Posts: 4
Cherylkorca on Feb 18, 2020February 18th, 2020, 4:50 pm EST
This last week I collected this larvae like Nymph and I am bit confused because i can not find anything close to this shape of bug ??? here are few images of it and thank you for your help, This guys was found in slower water under rock.
Wbranch
Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Feb 19, 2020February 19th, 2020, 12:13 am EST
Is there any reason you posted three images of one picture and seven images of the other picture? I guess you wanted to make sure we saw it.
Catskill fly fisher for fifty-five years.
Millcreek
Healdsburg, CA

Posts: 344
Millcreek on Feb 19, 2020February 19th, 2020, 12:54 am EST
I think it might be a caddis, probably a member of the Hydropsychidae family. You can see what appear to be gills under the body and the filaments on the end of the body.


http://www.troutnut.com/topic/8581/Hydropsyche-larvae-and-pupae-californica
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
Creno
Grants Pass, OR

Posts: 302
Creno on Feb 19, 2020February 19th, 2020, 4:33 am EST
You are correct that it is a hydropsychid. And I would go with one of the Hydropsyche species.
Leskorcala
Posts: 16
Leskorcala on Feb 20, 2020February 20th, 2020, 2:11 pm EST
Thank you both for your help , I did collect few more today and they were in their tubular like gravel?sand cases , so its Caddis larvae for sure
Leskorcala
Posts: 16
Leskorcala on Feb 20, 2020February 20th, 2020, 2:16 pm EST
No , no reason sir , just mistake on my part , compute was not loading and when did it load all

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