Key to adult males of Regalana:

1. Aedeagus apex with single pair of elongate (LV) processes (Fig. 62)......................... R. prestoi sp. nov. (Peru)

- Aedeagus apex with three or four pairs of processes (Figs 26, 50): anteromedian (AM), anterolateral (AL), laterodorsal (LD) and/or lateroventral (LV)............................................................................... 2

2. Aedeagus apex with LV bearing additional branches or processes (Fig. 38)........................................ 3

- Aedeagus apex with LV lacking branches or processes (Figs26, 50)............................................. 5

3. Aedeagus shaft with pair of lateral slender elongate processes at mid-length (Fig. 14); apex with LV directed laterally (Fig. 14)............................................................................. R. bobbyi sp. nov. (Ecuador)

- Aedeagus shaft without paired elongate processes at mid-length (Fig. 3); apex with LV directed ventrally, parallel to shaft in posterior view (Fig. 2).................................................................................. 4

4. Aedeagus shaft with expanded lateral flanges at mid-length (Fig. 38); apex with LD curved and converging in dorsal and posterior views (Figs 38, 39) and LV as long as half of shaft length (Fig. 37)........................ R. ericki sp. nov. (Peru)

- Aedeagus shaft without expanded lateral flanges at mid-length (Fig. 3); apex with LD widely divergent in posterior view (Fig. 3) and LV shorter than half of shaft length (Fig. 2)....................... R. corona DeLong & Freytag, 1975 (Panama)

5. Aedeagus apex with LV, in lateral view, positioned in same plane as shaft (Fig. 49)................................. 6

- Aedeagus apex with LV, in lateral view, oriented anteriorly or posteriorly to shaft (Figs 25, 73)....................... 7

6. Aedeagus shaft with lateral dentiform projections along apical half (Fig. 50); apex with AL, in dorsal view, with apices abruptly converging (Fig. 51) and LD sharing a common stem with LV; style without serrated ventral margin (Fig. 48)....................................................................................... R. hanki sp. nov. (Peru)

- Aedeagus shaft without lateral dentiform projections (Fig 96); apex with AL, in dorsal view, completely parallel to eachother (Fig. 97) and LD absent (Fig. 95); style with ventral margin serrated (Fig. 94)............ R. uni sp. nov. (French Guiana)

7. Aedeagus apex with LD much shorter than AD in dorsal view (Fig. 75) and LV extended anterior to shaftin lateral view (Fig. 73)............................................................................ R. sheilae sp. nov. (Brazil)

- Aedeagus apex with LD approximately as long as AD in dorsal view (Fig. 27) and LV extended posterior to shaft in lateral view (Fig. 35).................................................................... R. dianae sp. nov. (Peru)