Delias lytaea is a butterfly in the family Pieridae. It was described by Frederick DuCane Godman and Osbert Salvin in 1878. It is endemic to the Bismark archipelago (New Britain, New Ireland and New Georgia).
D. lytea Godm. is a charming, but rare species of the Bismarck Archipelago, without opaline gloss on the under surface, and also otherwise with duller colours, which present a mealy appearance. The female is more than twice as broadly margined with black as the male. New Pomerania (= New Britain). â Delias georgina Gr.-Sm. [nec C. & R. Felder] (54 b), from the Solomon Islands, appears to differ but very little.
lytaea is a member of the Delias isse species group