Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Stream photos

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Stenonema femoratum (Cream Cahill) Mayfly Nymph Pictures

This mayfly was collected from Mongaup Creek in New York on May 6th, 2007 and added to Troutnut.com by Troutnut on May 18th, 2007.

Discussions of this Nymph

Not Stenonema femoratum

4 replies

Posted by Dewalt on Jun 12, 2013

Last reply on Jun 12, 2013 by Entoman

Only Stenonema left in North America (after taxonomic revision) is S. femoratum. The underside of the abdomen has rows of roundish dark spots at the lateral margins. This one does not.

Finally my "Stenonema" section isn't empty

2 replies

Posted by Troutnut on May 18, 2007

Last reply on May 20, 2007 by Troutnut

I've been looking for one of these for a while. After I realized that everything I was calling Stenonema had been renamed to Maccaffertium, the section for this once-popular genus was empty. Now with this one from a small stream in the Catskills I'm pretty sure I've got an actual Stenonema again.

I would welcome a verification from those of you with more entomological training, but it looks right to me.