Poulton 1926. Breeding experiments on Charaxes etheocles at Jinja, Uganda, by Dr. Robert van Someren, and on other dior polymorphic butterflies at Nairobi, Kenya Colony, by Dr. V. G. L. van Someren. Verh. III. Internat. Ent-Kongr Zurich 1925, 2 1926: pp. 507-517