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Tribe Chironomini. Most members of tribe Chironomini fit into one of these genus groups:

Chironomus, Harnischia, and other genera with reduced flagellomere count in males.
Polypedilum, Endochironomus, Sergentia, etc.
Microtendipes, Lautoborniella, etc.

It's probably in the group with Polypedilum, but I don't think it is Polypedilum.