During the study of the Nearctic Tachinidae it became obvious that, in order to secure an adequate idea of the relationships of the various genera, it would be advisable to study representatives of the family from all parts of the world, and requests for African material met with hearty response from several sources. The extensive collection made by the American Museum of Natural History Congo Expedition has already been dealt with, and the report will appear elsewhere. Mr. H. K. Munro, of Pretoria, South Africa, has forwarded his entire collection with the request that it be worked over, since very few of the species were determined. Dr. Guy A. K.Marshall, Director of the Imperial Bureau of Entomology, has also been kind enough to forward a large amount of material, and a great deal more has been promised from other sources. It was originally intended to prepare a synopsis of the South African Tachinidae preparatory to a more detailed study. However, the large number of species and genera represented in the thousands of specimens at hand makes such an undertaking so extensive that it is deemed advisable to report upon certain genera or larger groups in order that most of the material may be returned to the owners, retaining such specimens as may be necessary for further study.