Key to species of Nemognathomimus

1 Last abdominal sternite slightly to strongly depressed or excavated.............................................. 2

- Last abdominal sternite uniformly convex.................................................................. 3

2 Last abdominal sternite strongly excavated; elytra opaque, bicolored........... N. opacipennis Chemsak & Noguera, 1993 .

- Last abdominal sternite slightly depressed, or flattened in some individuals but not convex; elytra unicolorous, black or orange.............................................................................. N. pallidulus (Linsley, 1935)

3 Pronotum with punctation deep and contiguous, integument reticulated in appearance, orange with a longitudinal dark median fascia, extending generally from base to apex, and basal angles with pubescence obscuring integument.................................................................................................. N. breviceps Giesbert, 1997

- Pronotum with superficial to moderately deep punctures that are sparse to almost contiguous, integument not reticulated in appearance; unicolorous black or orange, or orange with a pair of black maculae on apical half........................ 4

4 Pronotum with small and superficial punctures, polished; elytra opaque, greenish.................... N. wappesi sp. nov.

- Pronotum with small punctures that are nearly contiguous, elytra shining black..................................... 5

5 Mesocoxa with posterior margin rounded, not projecting................... N. michelbacheri Chemsak & Giesbert, 1986

- Mesocoxa with posterior margin with an obtuse dentiform projection............................. N. angelicae sp. nov.