This specimen is certainly
Nyctiophylax and most likely
Nyctiophylax affinis. I don't know my caddisfly parts well enough to definitively follow the
Nyctiophylax key in
Morse (1972), but that source states that
affinis is the predominant Midwestern species, being widespread and common in the region where I found this one. The anatomy of this one seems to match those at least as well as the other two potential options based on range,
Nyctiophylax uncus and
Nyctiophylax banksi.