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Agreed 2 rows, which means it can't be Copromyza as that has one row.
Systematics of Crumomyia Macquart and Alloborborus Duda
(Diptera: Sphaeroceridae)
ALLEN L. NORRBOM and KE CHUNG KIM The Frost Entomological Museum,
Department of Entomology, The Pennsylvania State University