Key to species of Olidiana from the Indian subcontinent (Males)

1. Forewing traversed with two transverse yellow or translucent ivory bands (Figs. 2 B–C)............................. 2

- Forewing without such bands............................................................................ 3

2. Forewing bands yellow (Figs. 2 B–C)....................................................... O. brevis (Walker)

- Forewing bands translucent ivory.......................................................... O. pectita (Distant)

3. Pygofer with a blade-like (Fig. 33 H)) or lobe-like (Fig. 36 H) caudoventral process................................ 4

- Pygofer without a caudoventral process................................................................... 15

4. Pygofer caudoventral process blade-like (Fig. 33 H), sometimes bifid (Fig. 38 I)................................... 5

- Pygofer caudoventral process lobe-like (Fig. 36 H).......................................................... 11

5. Pygofer caudoventral process exceeding dorsal margin of pygofer in lateral view (Fig. 33 I).......................... 6

- Pygofer caudoventral process not attaining dorsal margin of pygofer in lateral view (Fig. 39 I)........................ 7

6. Aedeagus subapical process dentate in basal half (Fig. 35 L).................................. O. perbrevis (Nielson)

- Aedeagus subapical process spinose at apex (Fig. 33 B)...................................... O. lanceolata sp. nov.

7. Pygofer caudoventral process unequally forked (Fig. 38 I)..................................... O. umroensis sp. nov.

- Pygofer caudoventral process not forked (Fig. 39 I).......................................................... 8

8. Aedeagal shaft distad of base of subapical process longer than length of process (Fig. 39 B)........... O. unidenta sp. nov.

- Aedeagal shaft distad of base of subapical process shorter than length of process (Figs. 31 C, 37 C).................... 9

9. Aedeagal shaft in lateral view more or less straight except near apex (Fig. 37 C).................................. 10

- Aedeagal shaft in lateral view distinctly curved dorsally in distal ½ length (Fig. 31 C)................. O. indica (Walker)

10. Aedeagal shaft subapical process with spine-like processes in distal 1/3 (Fig. 34 M)................ O. nocturna (Distant)

- Aedeagal shaft subapical process with several minute teeth apically (Fig. 37 B)...................... O. serra (Nielson)

11. Subgenital plate with apical spine (Fig. 35 B)................................................. O. pectita (Distant)

- Subgenital plate without apical spine..................................................................... 12

12. Aedeagal shaft subapical process with one secondary spine at basal ¼ and remaining at midlength only (Figs. 35 O–P)......................................................................................... O. praetexta (Distant)

- Aedeagal shaft subapical process with arrangement of secondary setae not as above (Figs. 34 E, Q)................... 13

13. Aedeagus with gonopore proximad of subapical process on shaft (Figs. 34 D–E).................... O. genista (Nielson)

- Aedeagus with gonopore at base of (Fig. 34 P) or on subapical process (Fig. 35 G)................................ 14

14. Aedeagus with gonopore at base of subapical process (Fig. 34 P)............................... O. opulenta (Distant)

- Aedeagus with gonopore on subapical process (Fig. 35 G)................................... O. peniculata (Nielson)

15. Aedeagal shaft subapical process with long marginal spine-like setae (Figs. 32 B, 36 A–B).......................... 16

- Aedeagal shaft subapical process with small marginal dentition in distal half (Figs. 30 A–D)........... O. fletcheri sp. nov.

16. Aedeagal shaft with one or two short subapical spines in addition to subapical process (Fig. 32 A).................... 17

- Aedeagal shaft with only subapical process (Figs. 36 A–B).................................... O. perculta (Distant)

17. Aedeagal shaft subapical process straight, more than ¾ as long as shaft (Figs. 34 H–I, 35 S–T)....................... 18

- Aedeagal shaft subapical process curved, at most ½ as long as shaft (Figs. 32 A–B)................. O. kirkaldyi (Nielson)

18. Aedeagal shaft subapical process with numerous spine-like setae (Figs. 34 H–I)................. O. multispinata (Nielson)

- Aedeagal shaft subapical process with a few spine-like setae (Figs. 35 S–T)................. O. sparsispinulata (Nielson)