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This heleomyzid comes out at Tephrochlamys, but I can't fit it with rufiventris (no ad seta on mid femora...4 rows of acrostichals), flavipes or tarsalis (plain wings). I don't know laeta, but this has wings 4mm, which seems over the size of that species? Particularly obvious angled hairs on the genital segment. East Yorkshire, UK today