Erionota thrax, the palm redeye or the banana skipper, is a butterfly belonging to the family Hesperiidae. It is found from India, through south-eastern Asia to Papua New Guinea. In the north it is found up to southern China. It is an introduced species on various Pacific islands, including the Solomon Islands and Hawaii. It has also been recorded from Mauritius.
The wingspan is 70–77 mm. There are multiple generations per year.
Male and female. Wings above chocolate-brown; anterior wings with three discal pale ochraceous spots, situate one crossing cell, another beneath cell and between the two lower median nervules, and the third and smallest between the first and second median nervules; posterior wings with the fringe greyish-ochraceous. Wings beneath paler than above; posterior wings with a discal, rounded, macular, darker fascia. Body and legs more or less concolorous with wings.
- Erionota thrax thrax (Indonesia)
- Erionota thrax mindana Evans, 1941 (southern and central Philippines)
- Erionota thrax hasdrubal Fruhstorfer, 1910 (northern Moluccas)
- Erionota thrax alexandra De Long et Treadaway, 1993 (Luzon, northern Philippines)
- Afrotropical Butterflies: Hesperiidae - Subfamily Hesperiinae
- The Banana Skipper's Leaf Scroll: A New Overwintering Site for the Okinawan Paper Wasp, Polistes japonicus / Yosiaki ITO and Hiroaki NAKAMORI
- Biological control of the banana skipper, Pelopidas thrax (Linnaeus) (Lepidoptera; Hesperiidae) in Hawaii./Mau, R. F. L.; Murai, K.; Kumashiro, B.; Teramoto, K.
- Watson, E. Y. 1891. Hesperiidae Indicae: descriptions of the Hesperiidae of India, Burmah and Ceylon. Madras.
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