The mesosomal musculature of Ampulex compressa divergent to Sphecidae; volume rendering, transparent exoskeleton. A–C anterior to the right; D–H anterior to the left. A. Medial view, all relevant muscles visible from the centre; B. Medial view on submedial muscles; C. Medial view, further lateral located muscles; D. All relevant muscles discernible from lateral view; E. Muscles located sublateral, lateral view; F. Muscles located further medial, lateral view; G. All newly identified muscles (plus pl2-cx2), lateral view; H. Dorsolateral view on all newly identified muscles (plus pl2-cx2). Abbreviations: sp1occ – anterior thoracic spiracle occlusor; ism1,2-ba2 – intersegmental membrane-mesobasalar; pl2-t2b – second mesopleuro-mesonotal; sp3occ – posterior thoracic spiracle occlusor; s2-cx2 – mesosterno-mesocoxal; pl2-cx2 – mesopleuro-mesocoxal; pl2-cx2b – second mesopleuro-mesocoxal; fu2-cx2 – mesofurco-mesocoxal; fu2m-tr2 – median mesofurco-mesotrochanteral; pl3a-ba3 – anterior metapleuro-metabasalar; t2p-t3 – posterior mesonoto-metanotal; pl3la-t3 – anterolateral metapleuro-metanotal; pl3lp-t3 – posterolateral metapleuro-metanotal; pl3v-3ax3 – ventral metapleuro-third axillary sclerite of hind wing; pl3-sa3 – metapleuro-metasubalar; pc3l-fu3 – lateral metapecto-metafurcal; fu3-cx3 – metafurco-metacoxal; fu3l-cx3 – lateral metafurco-metacoxal; fu3m-cx3 – median metafurco-metacoxal; pl3l-cx3 – lateral metapleuro-metacoxal; fu3-tr3 – metafurco-metatrochanteral; pl3-tr3 – metapleuro-metatrochanteral; ph3-T2 – metaphragmo-second abdominal tergal; T1-S2 – propodeo-second abdominal sternal; fu3-S2 – metafurco-second abdominal sternal; s3-S2 – metasterno-second abdominal sternal. Scale bars: 0.7 mm (A–C), 0.8 mm (D, E), 0.6 mm (F–H).