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.
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Some characteristics from the microscope images for the tentative species id: The postero-lateral projections are found only on segment 9, not segment 8. Based on the key in Jacobus et al. (2014), it appears to key to Neoleptophlebia adoptiva or Neoleptophlebia heteronea, same as this specimen with pretty different abdominal markings. However, distinguishing between those calls for comparing the lengths of the second and third segment of the labial palp, and this one (like the other one) only seems to have two segments. So I'm stuck on them both. It's likely that the fact that they're immature nymphs stymies identification in some important way.
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Bfdfisher
Posts: 1
Posts: 1
Bfdfisher on May 26, 2011May 26th, 2011, 5:50 pm EDT
This was the hatch of the night on 25 May 2011. It was epic....yet nothing was rising or visibly feeding. Not really positive what it is. It could be a Hendrickson, it's just so dark and eyes are so red. All the bugs coming off had the same strikingly red eyes.
Thanks all
Thanks all
PaulRoberts on May 26, 2011May 26th, 2011, 7:10 pm EDT
Male Ephemerellids of some type. Late for subvaria unless you are up north. Early for Seratella me thinks.
Where are you?
What size (hook size) were they?
Where are you?
What size (hook size) were they?
Troutnut on May 27, 2011May 27th, 2011, 12:36 am EDT
If you click the "edit" link above your post, you'll see an option to attach your picture... that'll potentially help us with the ID.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
Troutnut and salmonid ecologist
PaulRoberts on May 27, 2011May 27th, 2011, 6:06 am EDT
I'm going to guess right now:
Serratella deficiens/tibialis -#16 chocolate dun with nearly black wings, pale legs, and red eyes on males.
If not such dark wings and a dark olive body then mebbe a Drunella.
Serratella deficiens/tibialis -#16 chocolate dun with nearly black wings, pale legs, and red eyes on males.
If not such dark wings and a dark olive body then mebbe a Drunella.
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