FIGURE 13 Male genitalia. Surstyle lobe. Ventral view, A in Systematic position and composition of Merodon nigritarsis and M. avidus groups (Diptera, Syrphidae) with a description of four new hoverfLies species

FIGURE 13 Male genitalia. Surstyle lobe. Ventral view, A) Merodon crassifemoris, B) Merodon angustus, C) Merodon femoratus (incision between anterior and posterior lobes of surstylus marked with arrow), D) Merodon testaceus (incision between anterior and posterior lobes of surstylus marked with arrow), E) Merodon quadraticus, F) Merodon taniniensis. Scale: 0.2 mm. al–anterior lobe of surstylus, pl–posterior lobe of surstylus.