for F. difficilis going by a comment on my other picture. It's nice having experts like Dave Ruiter and Thomas Ames helping out here.

First - I am struggling with the term "expert." There are lots of folks who know a lot more about caddis than I. I find these photos fascinating in and of themselves. They continually show me that I don't really know much about the live material. Second, a long time ago a fellow told me that an expert is someone who knows an awful lot about a subject and seldom shares that knowledge. I am always trying to be sure I never meet that definition.

The smaller critter has enough of the private parts visible that I would think it is F.missa. And the dark stripe at the chord concurs with bugei's previous observation.

creno

I like the definition from the physicist Neils Bohr: "An expert is a person who has made all the mistakes that can be made in a very narrow field." I'm not there, yet.

I'm glad you're not an "expert" by your description. Thanks for sharing your knowledge with us here at bugguide.

that negative definition of expert, Dave, you have nothing to worry about. I appreciate your willingness to share what you know and have learned a lot. Thanks.