Key to species of Molopopterus (males)

Note: M. mallyi (Cogan, 1916) and M. nigriplaga Jacobi, 1910, known only from females, are not included in the key. M. velox Vayssière, 1930 and M. binotatulus Vayssière, 1930 are excluded from Erythroneurini according to the illustrations of their wing venation. M. velox is moved to Empoascini as a species Incertae sedis. M. binotatulus is consistent with Typhlocybini in hind wing venation, but its forewing venation is unusual, therefore is considered as a species Incertae sedis within Typhlocybinae .

1 Aedeagus with pair of slender processes (may be very small) arising laterally at or near apex of shaft (Figs 14g, h, 15g, h).. 2

- Aedeagus without lateral pair of slender distal processes (Figs 16f, 17h)......................................... 21