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Hi all,

If this would be from the Palaearctic I'd suggest Prosopantrum flavifrons. Certainly because Punta arenas is at the coast. Here in North-West Europe an alien species from the Neotropics.
If anyone knows if there is any literature on Neotropic Heleomyzidae/Prosopantrum… I'd like to have a key to and original descriptions of Neotropic Prosopantrum.

Kind regards,

Ectemnius