Green’s Dictionary of Slang

(mid-19C) a promiscuous woman.

1869		Sportsman (London) 27 Feb. 4/1: Notes on News [...] [W]e shake hands with the Devil over our polite dislike to call an abandoned, if prosperous, woman by her proper designation [...] a tendency to glorify women who are too idle to work in humble stations into the fashionable ‘Perditas’ of upper class immorality [ibid.] 11 Mar. 2/1: Some interesting pauper or newly discovered Perdita.
1879		London Life 12 July 2/1: [A] manager of [...] printing offices and comediennes, or periodicals and frail Perditas.