Key to species of Narvesus

1 Fore and middle tibiae without sub median dark ring (Fig. 1 A), fore femora without a row of spiniferous tubercles (Fig. 1 H)...................................................................................... N. carolinensis Stål

- Fore and middle tibiae with a sub median dark ring (Fig. 2 A), fore femora with a row of spiniferous tubercles (Fig. 2 H)............................................................................................. N. minor Barber Narvesus carolinensis Stål 1859 (Figs. 1 A–H)