S. Mahunka szerk.: Folia Entomologica Hungarica 61. (Budapest, 2000)

Etymology — The species name "tumidulus" refers to the swollen scape. Description of the male holotype. — Body 7 mm long. Scape in lateral view short and broadening basally, 1.5 times as long as broad (Fig. 1, see arrows). Flagellomeres 1-4 4.5 times as long as broad apically, further flagellomeres gradually shortening. Pedicel and flagallomeres with errect and long setae. — Head in dorsal view between eyes 1.4 times as wide as mesosoma between tegulae. In dorsal view temple convex, eye twice as Figs 1-14. — 1-8. Plumarius tumidulus sp. n. — 1 : scape in lateral view, 2 : head in dorsal view, 3: clypeus in dorsal view, 4: mesoscutum in lateral view, 5: anterior transverse groove of propodeon, 6: hind femur, 7: distal part of left fore wing, 8: tergites 1-2. — 9-14. Plumarius baloghi Nagy — 9: scape in lateral view, 10: head in dorsal view, 11: anterior transverse groove of propodeon, 12: mesoscutum in lateral view, 13: tergites 1-2, 14: hind femur