Eumenes aquilonius Yamane, 1977. ♀ (21, 23, 25, 27–30) ♂ (22, 24, 26) 21, 22 habitus (dorsal view) 23, 24 clypeus (frontal view) 25 head and pronotum (dorsal view) 26 antenna 27 metasomal segments 2–6 (lateral view) 28 T2 (dorsal view) 29 T1 (dorsal view) 30 lamella of T2 apical margin (dorsal view).