Some characteristics from the microscope images for the tentative species id: The postero-lateral projections are found only on segment 9, not segment 8. Based on the key in Jacobus et al. (2014), it appears to key to Neoleptophlebia adoptiva or Neoleptophlebia heteronea, same as this specimen with pretty different abdominal markings. However, distinguishing between those calls for comparing the lengths of the second and third segment of the labial palp, and this one (like the other one) only seems to have two segments. So I'm stuck on them both. It's likely that the fact that they're immature nymphs stymies identification in some important way.
Metanotal setal warts: The setal areas or setal warts on the caddisfly larva metanotum are clearly defined, often sclerotized, gently convex bumps that bear numerous setae. Their configuration is useful for identification. There are typically three on each side of the metanotum, denoted sa1 (near the front in the middle of the metanotum), sa2 (closer to the back, but still near the middle), and sa3 (a typically-longer patch near the edge of the metanotum).
These other words reference the same concept: metanotal setal wart, metanotal setal areas, metanotal setal areas, metanotal sa1, metanotal sa2, metanotal sa3.
