The larva of the aquatic dance fly genus Proclinopyga Melander is described for the first time. The larval association with adult stages was facilitated using COI mitochondrial DNA barcode sequences. The larvae of Proclinopyga are found in coarse substrates of riffles and other swift-flowing sections of streams and small rivers. The larvae infrequently occur in benthic samples collected from these habitat types, where they may co-occur with the larvae of other Empididae genera. The final instar larva is described and illustrated and a key to the larvae of genera of Clinocerinae of North America is updated.