Sphaerophoria retrocurva Hull

Vockeroth J. R., 1973, Some New or uncommon Syrphini (Diptera: Syrphidae) from Southern Africa, Annals Natal Mus. 21.3.595 - 607. pdf 21 (3), pp. 595-607 : 595-607

Sphaerophoria retrocurva Hull Sphaerophoría reıracurva Hull, 1944 , Ann. Mag. nal. Hist. (11) 11: 58. Male terminalia (fig. 8): T ergite 9 with cereal notch open. Surstylus in normal position, scarcely divided into lobes, with a thumb-like process near base of ventral margin and a thickened and moderately setose ridge near ventral margin on inner surface, the outer surface with sparse short hairs, the inner surface with fewer but slightly longer hairs. Ster- nite 9 with posterolateral angles produced well beyond base of superior lobe, each process with a single short seta near apex; posteroventral emargination about half as long as sternite. Superior lobe bent sharply dorsad at mid length, with a few small setae at postero- ventral angle and with a slightly thickened and rugose semi-membranous appendage at apex. Aedeagal base almost straight in profile, the anterior half strongly depressed and almost twice as broad as posterior half, the latter with the lower surface flattened and the upper surface rounded, Distal portion of aedeagus with about basal g sclerotized and strongly flared distally, the apical ä membranous and very greatly expanded. Specimens examined: 2 33 (holotype and paratype), Mossel Bay, Cape Province (B. M. (N. H.)); l 5, Little Berg Summits, Cathedral Peak Forestry Reserve, Drakensberg, Natal, 1 675- 1 830 m (Natal Museum).