A new genus and species of gall midge (Diptera: Cecidomyiidae: Cecidomyiidi) with notes on adult cecidomyiid mouthparts and their terminology.

Camillemyia prominens Gagné, gen. n. et sp. n., (Diptera: Cecidomyiidae; Cecidomyiinae) is described for a gall midge from Mexico with an extremely elongate neck and proboscis. The external and internal basic composition of the proboscis of Cecidomyiidae, as exemplified by Cecidomyia resinicola Osten Sacken, is reviewed to help understand the structural changes found in Cam. prominens as compared to those of Contarinia prolixa Gagné & Byers, another species with spectacularly modified mouthparts.