Figs 8, 9 in Proboscis labellar hooks in southern African species of Sepedon (Diptera: Schizophora: Sciomyzidae)

Figs 8, 9. Sepedon testacea: (8) labellum, everted, showing labellar hooks (arrowed), depressed pseudotracheal rings (PR) and interpseudotracheal membrane (IM); (9) labellar surface, showing depressed pseudotracheal rings (PR) and interpseudotracheal membrane (IM). Note the insertion of the hooks in membrane away from the pseudotracheal rings, as well as the conspicuous grooving between the papillae in the interpseudotracheal membrane. Magnifications: Fig. 8, 299×; Fig. 9, 1570×.