Bia actorion
Uncommon up to 850 m., probably more common in lowlands. Found inside forest; occasionally attracted to bait. I'm not sure which subspecies occur(s) in Cusco.
Similar species: B. peruana (I have no Cusco records) is very similar; I don't know of a difference on the V, but peruana has extensive blue on DHW, unlike actorion.
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