FIGURE 22 Sternum 4. 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 22 Sternum 4. Ventral view, A) Merodon longisetus sp. n., male, B) Merodon nigritarsis, male, C) Merodon obstipus sp. n., male, D) Merodon femoratoides, male, E) Merodon obstipus sp. n., female (central longitudinal suture marked with arrow), F) Merodon cohurnus sp. n., male, G) Merodon rutitarsis sp. n., male, H) Merodon avidus, male. Scale: 1 mm. cf–central notch, p– Downloaded posterolateralfrom Brill. corner com.08/29/2023 05:43:36PM via free access