Sphaerophoria quadrituberculata Bezzi, 1915

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 : 606

Sphaerophoria quadrituberculata Bezzi Sphaerophoria quadrituberculata Bezzi, 1915 , Syrph. Ethiop. Reg., p. 35; Stuckenberg, 1954, J. ent. Soc. sth.

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I Bezzi (1915: fig. 6) has figured the male abdomen.

Male terminalia (fig. 7): Tergite 9 with cercal notch open, slightly asymmetrical, pro- duced posteroventrad far beyond posterior margin of surstyli as two tapering processes, the left process twisted and wrinkled apically (possibly deformed). Cerci slightly asymmetri- cal. Surstylus broadly articulated to lower margin of tergite 9, subquadrangular in outline, the anteroventral angle broadly rounded, the posteroventral angle produced ventrad, more heavily sclerotízed, and with its margin irregularly toothed; outer surface with sparse short hairs, inner surface with more abundant and longer hairs; surstylar apodeme very large, its anterior portion joined to surstylus by thick membrane. Sternite 9 small, on each side with slender anterodorsal process articulating with surstylar apodeme, in ventral view slightly asymmetrical, with a slender curved process projecting caudad from the postero- ventral angle on right side only, the posteroventral emargination filled with thick membrane. Superior lobe compressed, directed caudad and then curved strongly dorsad, with a few weak hairs at posteroventral angle, the apex without a membranous appendage. Aedeagal base V-shaped in lateral view, the anterior portion subcylindrical and projecting forward