It's a casemaker that I don't see very often -- Apatania incerta -- but it's one of the things I was hoping to see this morning. Beaty describes the case as "composed of mineral particles and strongly curved, cornucopia-shaped." ("The Trichoptera of North Carolina," p. 85) Pretty clear in the photos I've taken.
The genus ID goes like this.
Mesonotum with two plates; metanotal sa1 sclerites absent; arrangement of sa1 associated setae in a linear transverse row...mandibles usually with uniform scraper blades (not toothed). (Beaty, p.85) Works for me.
On the species he adds: "larvae 6-9 mm; head dark brown to black; nota brownish-black; anterior metanotal plates replaced by row of about 20 setae; legs yellow brown." But I'm not sure the species detail is needed. In our new key, incerta is the only species listed for Apatania. (Larvae of the Southeastern USA: Mayfly, Stonefly, and Caddisfly Species, p. 294)
With a Tolerance Value of 0.6, we can expect to find it only in very good streams. And when the case is right side up, the larva is covered with a hood. Normally, all we can see is the legs, but in this case, the part of the head also sticks out.