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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

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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Sandfly has attached these 3 pictures to aid in identification. The message is below.
Sandfly
tioga co. pa.

Posts: 33
Sandfly on Jan 7, 2009January 7th, 2009, 12:20 pm EST
here are a few im not sure about
sandfly
shop owner
N.J.B.B.A. #2215
Tiadaughton T.U. 688
I didn't Escape------They gave me a day pass !
Taxon
Taxon's profile picture
Site Editor
Plano, TX

Posts: 1311
Taxon on Jan 8, 2009January 8th, 2009, 2:58 am EST
Bob-

I believe it (them) to be Epeorus female duns.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
Sandfly
tioga co. pa.

Posts: 33
Sandfly on Jan 8, 2009January 8th, 2009, 8:11 am EST
Tkanks,
I was thinking the same, its a size 14 fly.Wasn't sure if it has a common name.
sandfly
shop owner
N.J.B.B.A. #2215
Tiadaughton T.U. 688
I didn't Escape------They gave me a day pass !
Taxon
Taxon's profile picture
Site Editor
Plano, TX

Posts: 1311
Taxon on Jan 8, 2009January 8th, 2009, 10:29 am EST
Bob-

Tkanks,
I was thinking the same, its a size 14 fly.Wasn't sure if it has a common name.


Yes, the various Epeorus species, life stages, and sexes are known by more common names than you can shake a stick at. Take your choice among:

Blue Quill
Cream Variant
Croquette
Dark Golden Quill
Dark Gordon Quill
Dark Graywinged Quill
Gordon Quill
Graywinged Pink Quill
Graywinged Yellow Quill
Iron Dun
Light Blue Quill
Light Cahill
Little Blue Quill
Little Marryat
Little Yellow Mayfly
Little Yellow Quill
Medium Blue Quill
Pale Evening Dun
Pale Evening Olive
Pale Evening Quill
Pale Sulphur Dun
Palewinged Pink Quill
Pink Cahill
Pink Lady
Quill Gordon
Red Quill Spinner
Salmon Spinner
Slate Brown Dun
Slate Cream Dun
Small Cream Variant
Sulphur
Sulphur Dun
Western Gordon Quill
Western Graywinged Yellow Quill
Western Little Marryat
Western Quill Gordon
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
Sayfu
Posts: 560
Sayfu on Nov 12, 2011November 12th, 2011, 3:07 pm EST
MY DAWD! That's as many names as I've been called!

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