Miscellaneous Records of Cecidomyiidae (Diptera) from the USA

New collection and rearing records are provided for 17 named species, and over 30 undescribed or not fully identified species of Cecidomyiidae (Diptera) from across the USA. These include gall inducers and other phytophages as well as inquilines, predators, and mycophages. New host and distribution records are presented, and specimens are associated with at least ten galls that have not been documented previously. Rearings of associated parasitoid wasps (Hymenoptera: Chalcidoidea, Platygastroidea) are also reported.