Tirathaba complexa is a species of moth of the family Pyralidae. It was described by Arthur Gardiner Butler in 1885."Tirathaba Walker, 1864" at Markku Savela's Lepidoptera and Some Other Life Forms. Retrieved June 11, 2017. It has been recorded from Tuvalu and Fiji.
The wingspan is about 25 mm. The forewings are whitish brown. The hindwings are almost white and semi-transparent.Annals and Magazine of Natural History (5) 15 (87) : 242
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