Arrhenes marnas, the affinis skipper or swamp darter, is a butterfly of the family Hesperiidae. The species was described by Felder in 1860. It is found from Queensland to Papua.
The larvae feed on Leesia hexandra.
Subspecies Arrhenes marnas marnas Arrhenes marnas affinis (north-east coastal strip of Queensland)
External links Australian Insects Papua Insects Foundation