Review of the Merodon natans group with description of a new species, a key to the adults of known species of the natans lineage and first descriptions of some preimaginal stages

SEM micrographs of Merodon makrisi Vujić, Radenković & Tot sp. nov. puparium. A pupal spiracle in dorsal view B pupal spiracle in ventral view C anterior spiracle D posterior respiratory process (prp) in dorsal view E anal segment F prp showing the spiracular plate. Abbreviations: cs – central scar, is – inter-spiracular setae, lp – lappets, prp – posterior respiratory process, so – spiracular opening, tu – tubercle. Scale bars: 200 μm (A, B); 100 μm (C); 500 μm (D, E, F).