Key to Derbidae tribes, genera and species of Seychelles

1 Hindwing more than half as long as forewing. Resting position with wings folded above abdomen (Fig. 1 A). (Cenchreinae). .............................................................................................................................................................. 3

- Hindwing not more than half as long as forewing. Resting position with wings spread (Figs 10 A–D). (Zoraidinae). ....................................................................................................................................................................................... 2

2 Body ochraceous (Fig. 9 A). Eyes dark, very large, reaching to base of clypeus. (Sikaianini). .................................... ................................................................................................................................... Sikaiana albomaculata (Distant)

- Body blackish, with light carinae and markings (Fig. 10). Eyes smaller, not reaching to base of clypeus (Figs 10 E– F). (Zoraidini). ................................................................................................................ Proutista moesta (Westwood)

3 No subantennal processes present. .............................................................................................................................. 6

- Head with distinct, crest-like subantennal processes (Figs 5 B, 6D, 7B–E). ............................................................... 4

4 Head narrow, pronotum about twice as wide as head (Fig. 5 A). ....................................... Fordicidia robusta Distant

- Head broader, width of pronotum less than 1.5 times width of head (Figs 6 B, 7B). .................................................. 5

5 Lateral carinae of vertex blackish (Fig. 7 D). Forewing with two black spots: one at the apex of clavus and one near the apex of the forewing (Figs 7 A–B). End of anal tube in males with pointed lobes directed ventrad (Figs 15 C–E). Ventromedian process of pygofer in males as in Fig. 15 F. ..................................... Paraphenice bimaculata (Distant)

- Lateral carinae of vertex yellowish (Fig. 6 B). Forewing with a single black spot at the apex of clavus and in some specimens with a longitudinal brown streak along entire wing (Figs 6 A–B). End of anal tube in males lobate (Figs 14 A–B), ventromedian process of pygofer in males as in Fig. 14 C. ............................... Paraphenice aurea (Distant)

6 Apex of head distinctly angulate in lateral view (Fig. 8 A). ........................................................ Vekunta bri, sp. nov.

- Apex of head rounded in lateral view (Figs 1 A, 3A). ................................................................................................. 7

7 Forewings without setiferous tubercles. Frons narrow, but lateral carinae well separated. Equirria phalaena Distant

- Claval veins with a prominent ridge of setiferous tubercles (Figs 1 B, 3A–B). Frons very narrow, lateral carinae almost touching each other. ......................................................................................................................................... 8

8 Upper part of body including eyes dark brown, with a reddish tinge (Figs 3 A–B). Vertex of head and a central fascia to pro- and mesonotum yellowish. Clypeus and legs yellowish (Fig. 3 C). Forewings very dark brown with some ochraceous spots (Figs 3 A–B). Veins sanguineous (Figs 3 A–B). Anal tube in male with two small apical processes pointing caudad (Figs 13 H). Aedeagus with slender shaft and with process “e” very long and slender (Figs 13 A–B). ................................................................................................................................. Aquaelicium elegantulum Distant

- Upper part of body fuscous-brownish, eyes blackish. Vertex of head and a central fascia to pro- and mesonotum greyish (Figs 1 A–B). Clypeus and legs ochraceous (Figs 1 A–C). Forewings fuscous-brown with some ochraceous spots, apices of upper apical veins sanguineous (Figs 1 A–B). Anal tube in male with two small apical processes pointing ventrocaudad (Figs 11 D, I). Aedeagus with process “e” shorter (Figs 11 A, 12A). ....................................... 9

9 Shaft of aedeagus slender (Figs 12 A–B). Apex of aedeagus with three acute processes and a semicircular lobe (Figs 12 A–B). ................................................................................................................... Aquaelicium brunnescens Distant

- Shaft of aedeagus broader (Figs 11 A, 11C). Apex of aedeagus with at least six acute processes, without semicircular lobe (Figs 11 A–C). .......................................................................................................... Aquaelicium typicum Distant