Key to the males of Eugenys Quate, 1996

1. Hypopods with a lateral digitiform and curved projection (see Fig. 6C, E.) .... E. singularis sp. nov.

– Hypopods without a lateral digitiform projection (as in Fig. 3A–E) ................................................ 2

2. Hypopods with 14–16 apical tenacula (Figs 2B, 3E) .................................... E. cymosa Quate, 1999

– Hypopods with a single apical tenaculum (Fig. 3B, D–E) ............................................................... 3

3. Antennal flagellomeres without a patch of darkened sensilla (Fig. 4A) ........................................... 5

– Antennal flagellomeres with a patch of darkened sensilla (Fig. 8A) ................................................ 4

4. Aedeagus curved, without distinguishable paramere apart from the parameral sclerite (Figs 3D, 7E– F, H) ...................................................................................................................... E. upsilon sp. nov.

– Aedeagus straight, with distinguishable paramere in addition to the parameral sclerite(Figs 3B, 5B) ......................................................................................................... E. panamensis Quate, 1999

5. Aedeagus short, less than half the length of the ejaculatory apodeme; parameral sclerite not Y-shaped, appears absent (Figs 3E, 4E, G, 5A) ........................................................................ E. micra sp. nov.

– Aedeagus long, more than half the length of the ejaculatory apodeme; parameral sclerite Y-shaped and sclerotized (Figs 2A, 3C) .................................................................... E. clavellata Quate, 1996