The Discovery of the early Stages ofSimulium neaveiin phoretic Association with Crabs and a Description of the Pupa and the Male

The breeding-place ofSimulium neaveiRoub. has remained undisclosed, despite many attempts to discover it, ever since Dr. S. A. Neave first collected the females in 1911. In May of that year Neave made collections near the Yala River, Kenya, and in November of the same year caught more specimens in Western Ankole, Uganda. Roubaud described and named the species in 1915. Dry in 1921 captured some specimens feeding on man at Ngoina, near Kericho, Kenya, and made the important observation that the local natives connected the fly with the occurrence of a chronic skin disease in this district which has since been identified as onchocerciasis.