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Alderflies are close relatives of dobsonflies and their larvae resemble the better-known hellgrammites. Their life cycle is similar and they are never available to the trout en masse, but they are loose in the drift often enough to be of value.

This common name refers to only one family.

Insect Family Sialidae

These are pretty much always called Alderflies.
See Sialis for details. It is the only genus of alderflies.
Sialis Alderfly LarvaSialis  Alderfly Larva View 4 Pictures
Collected February 5, 2004 from in
Added to by on January 25, 2006
Male Sialis hamata Alderfly AdultMale Sialis hamata  Alderfly Adult View 2 Pictures
Collected May 15, 2012 from in
Added to by on May 18, 2012
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