Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 94. (Budapest 2002)

Bálint, Zs.: Miscellaneous notes on Arcas Swainson, 1832 (Lepidoptera: Lycaenidae, Eumaeini)

Figs 1-5. 1 = Papilio imperialis CRAMER: figures accompanied with the description; 2-3 = Areas imperialis (CRAMER), male, Ecuador (HNHM): 2 - dorsal view, 3 = ventral view; 4-5 = Areas imperialis (CRAMER) androconial clusters of male dorsal forewing: 4 = Colombia, Muzo (HNHM), 5 = Peru, Pucallpa (NMW)