Semomesia croesus, also known as the Croesus eyemark, is a species of butterfly in the family Riodinidae. It is found in most of South America.

Subspecies Semomesia croesus croesus (Surinam, Brazil: Bahia, Pará) Semomesia croesus meana (Hewitson, 1858) (Brazil: Amazonas) Semomesia croesus trilineata (Butler, 1874) (Brazil: Amazonas, Colombia, Peru) Semomesia croesus lacrimosa Stichel, 1915 (Colombia) Semomesia croesus siccata Stichel, 1919 (Bolivia) Semomesia croesus undosa Stichel, 1919 (Ecuador)

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