[A new phoretic species, simulium melanocephalum sp. n. (simuliidae: Diptera) from kivu, zaire, with taxonomic notes on the S. diceros-group (author's transl)].

A new species of the Simulium diceros-group (subgenus Phoretomyia) is described, the larvae and pupae of which are living in phoretic association with mayfly nymphs. The systematic position of the group, and the taxonomy of its species are discussed.