The Chaoborus (Diptera: Chaoboridae) component of the invertebrate drift of the Mwenda river,Lake Kariba,Central Africa

Chaoborus larvae were collected from the riverine drift of the Mwenda River during the 1972/3 rainy season. Large numbers of larvae were found in the early stages of flow following the 1972 dry season, fewer were found ten days later.Larvae which reached the lake in this way appeared to show no ill effects. Possible mortality arising prior to reaching the sampling point was doubtful since no dead larvae or parts were found in the material collected.