Euploea dorippus Klug, 1845: species, semispecies, subspecies, junior subjective synonym of Danaus chrysippus chrysippus (Linnaeus), and/or form – what does Klug’s dorippus represent? (Lepidoptera: Nymphalidae, Danainae)

Four syntypes of Limnas klugii Butler, 1886, from northern Somalia (NHMUK, London). Upperside left; halved underside right. a – male “Somali 84.83 22.4.84” [Somali coast, J.W. Yerbury; NHMUK010241714]; b – female “Somali 85.38 Dec. 23” [inland, south of Berbera, J.G. Thrupp; NHMUK010241716]; c – female “Somali 85.38” [inland, south of Berbera, J.G. Thrupp; NHMUK010241717]; note – this specimen appears to be have been ‘repaired’]; d – male “Somali 85.38” [inland, south of Berbera, J.G. Thrupp; NHMUK010241715].