Salmonflies
Pteronarcys californica
The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
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With a bit of help from the microscope, this specimen keys clearly and unsurprisingly to Hydropsyche.
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Slate Drakes
Like most common names,"Slate Drake" can refer to more than one taxon. They're previewed below, along with 3 specimens. For more detail click through to the scientific names.
Mayfly Family Isonychiidae
These are often called Slate Drakes.
See Isonychia for details. It is the only North American genus in this family.
I collected this female together with a male.
See 18 more specimens...
Mayfly Species Drunella walkeri
These are very rarely called Slate Drakes.
Ernest Schwiebert had this to say about the hatches of this chunky Eastern Drunella (Blue-Winged Olive) species:
See the Drunella and Drunella cornuta hatch pages for additional information.
An imitation is rarely required, but notes show that when it is needed it is needed badly.
See the Drunella and Drunella cornuta hatch pages for additional information.
References
- Schwiebert, Ernest G. 1955. Matching the Hatch. MacMillan Publishing Company.