oa Journal of the Entomological Society of Southern Africa - Studies in African Bombyliidae
The group of genera including Corsomyza Wiedemann, Megapalpus Macquart, Hyperusia Bezzi, Callynthrophora Schiner and Gnumyia Bezzi are closely related forms apparently endemic to Southern Africa. The most northerly record of any species of this group of which I am aware is that of Corsomyza ruficornis Bezzi, descriptionbed from the Victoria Falls, Northern Rhodesia (Bezzi, 1921). Paramonow (1954) descriptionbed the genus Pusilla from Katanga in the Belgian Congo, referring it to the subfamily Usiinae. Hesse (1938) removed the entire Corsomyza-group from the Usiinae to the end of the Bombyliinae, thus at the same time removing the Usiinae from the list of subfamilies recorded from the Ethiopian Region, so that Pusilla is at present the only Usiine genus known from Africa south of the Sahara.
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