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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This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.
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Green Sedges
This common name refers to only one family. Click its scientific name to learn more.
Caddisfly Family Rhyacophilidae
These are often called Green Sedges.
See Rhyacophila for details. It is an extremely important trout stream genus, containing well over 100 American species.
The other genus, Himalopsyche, contains only one relatively unimportant American species.
The other genus, Himalopsyche, contains only one relatively unimportant American species.
I collected this pupa and several like it from the same stream and on the same day as this larva. I suspect they're the same species. Every pupa I collected was in a brown casing like the one shown in one of the pictures below. I cut this pupa out of its case after a picture so you can see more details. It is close to but not fully developed.
See 10 more specimens...