Local feeder (Diptera: Cecidomyiidae) in stems of Apios

I noted stem galls inhabited by this species in October 2022. The galls were approximately 15mm long, subglobose to ovoid, hard, and light brown in color, with shallow longitudinal furrows on the surface. Each gall contained several larvae in individual blackened or browned chambers formed in the pale greenish-white interior tissue of the gall. Larvae were orange with a reddish spatula having two prominent teeth on its anterior end. In their chambers in the galls, the larvae spun cocoons for overwintering. Cocoons were whitish and roughly 4mm in length. An adult emerged from an overwintered gall in spring, and its general appearance and the observed characteristics of the larvae are consistent with Neolasioptera.