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149113 has attached these 7 pictures to aid in identification. The message is below.
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149113July 21st, 2016, 1:45 pm
Pennsy

Posts: 3
Found these two around Middletown, PA last evening. Both spinners with one spent and one upright. Looking at the previous posts it would seem these are female? These measured 27mm. Previous post seem to indicate Hexagenia bilineata
TaxonJuly 22nd, 2016, 1:42 am
Site Editor
Plano, TX

Posts: 1267
Hi Bob-

Welcome aboard. Yes, I believe the first two photos to be Hexagenia bilineata female imagoes. I believe the others to be Hexagenia female subimagoes of undetermined species.
Roger Rohrbeck
www.FlyfishingEntomology.com
CrepuscularJuly 22nd, 2016, 11:48 am
Boiling Springs, PA

Posts: 905
Yes sir. Like Roger said that's H bilineata. big girls! Thanks for posting.

Eric
149113July 22nd, 2016, 12:44 pm
Pennsy

Posts: 3
Thanks guys! I shot a few pics of one last evening and added those to the original post... couldn't figure out how to add them to a separate post. Looking at other ID's these seem like Hexagenia limbata but just wanted to confirm. This specimen measured 24.5mm and was a subimago. It was just hanging out near a light fixture with a lot of smaller mayflies
Jmd123July 22nd, 2016, 2:58 pm
Oscoda, MI

Posts: 2109
I love anything Hexagenia. The guys who flyfish the Huron River for smallies downstate love this hatch, and this is when they show up, into August too. Didn't get enough of Hex mania in June? Well here's another chance...

Jonathon
No matter how big the one you just caught is, there's always a bigger one out there somewhere...
CrepuscularJuly 23rd, 2016, 6:52 am
Boiling Springs, PA

Posts: 905
Looking at other ID's these seem like Hexagenia limbata but just wanted to confirm. This specimen measured 24.5mm and was a subimago. It was just hanging out near a light fixture with a lot of smaller mayflies

I'd call that H. limbata. And I have collected them together with H. bilineata from the Susquehanna River.
149113July 23rd, 2016, 1:09 pm
Pennsy

Posts: 3
Looking at other ID's these seem like Hexagenia limbata but just wanted to confirm. This specimen measured 24.5mm and was a subimago. It was just hanging out near a light fixture with a lot of smaller mayflies

I'd call that H. limbata. And I have collected them together with H. bilineata from the Susquehanna River.


Thanks! I saw some of the white flies last evening down by the park on the river. Considerably smaller than these hex mayflies but there were a lot of them

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