Well known for his many years' experience as explorer and hunter in the tropical Interior, and for the zeal and success with which he has collected and observed the ornithological fauna, Mr. Axel W. Eriksson has latterly, at my instance, turned his attention to the insects inhabiting the less known tracts. The collection of which the Butterflies now under notice formed the larger part was made by him during six months - Ist August, 1887, to 25th January, 1888 - spent in travelling between Ehanda, in the Southern Ombuela (or Ambuella) country, and Omborombongo, in Central Damara-land.