FIGURES 19 – 23 in On mysterious occurrence of butterflies in the genus Delias at Jinmen Islands, with clarification on the nomenclature of D. pasithoe (Linnaeus, 1767) and D. acalis (Godart, 1819) in southern China
FIGURES 19 – 23. Adult specimens of Delias acalis pyramus. 19. Dorsal view of male from Yunnan (YUNNAN: Dehong Zhou, Ruili Shi, Bangdashan, 1400 m, 5 / 6. XI. 2014, Coll. Y. F. Hsu & N. Y. Tsai); 20. Ventral view of individual in Fig. 19; 21. Dorsal view of female from Yunnan (YUNNAN: Dehong Zhou, Ruili Shi, Ruili Botanical Garden, 16. IX. 2015, Coll. Y. F. Hsu); 22. Ventral view of individual in Fig. 21. 23. Illustration associated with the original description of Papilio thysbe Cramer,  (from Cramer, ).