1. Frons centrally with an inverted chevron shaped dark mark.................................................... 2
- Frons without dark mark............................................................................... 9
2. Hind tibiae without lateral spine..................................................... D. stigmatica Distant, 1912
- Hind tibiae with a lateral spine........................................................................... 3
3. Anterior margin of vertex truncate; apical third of forewing without milky-white spots (Chen et al. 1989: figs 28A, D).......................................................................... D. truncata Chen, Yang & Wilson, 1989
- Anterior margin of vertex acute; apical third of forewing with milky-white spots................................... 4
4. Vertex length subequal to pronotum in mid line..................................... D. philippina (Melichar, 1914)
- Vertex distinctly longer than pronotum in mid line........................................................... 5
5. Lateral margins of frons without narrow dark stripes (Chen & He 2010: fig. 2).................................................................................................................... D. diana Chen & He, 2010
- Lateral margins of frons with several narrow dark stripes...................................................... 6
6. Vertex relatively short, as long in mid line as broad at base, median carina bordered with short longitudinal black stripes apically...................................................................... D. lineola (Matsumura, 1914)
- Vertex relatively long, longer in median line than broad at base, median carina bordered with longitudinal dark stripes from apex to base......................................................................................... 7
7. Forewing with CuA 1 straight or slightly convex distad of clavus, not reaching MP (Chou & Wang 1985: fig. 8a)................................................................................... D. acuminata Chou & Wang, 1985
- Forewing with CuA 1 obviously convex distad of clavus, reaching MP............................................ 8
8. Medioventral processes of pygofer tapering to end, apical margin angular; phallobase in ventral view each side of midline with one dentate process at proximal part (Chen et al. 1989: figs 27L, H).................. D. rubrostigma (Matsumura, 1914)
- Medioventral processes of pygofer constricted abruptly near apex, apical margin rounded and convex; phallobase in ventral view each side of midline with two dentate processes at proximal part (figs 11, 12)................... D. dentata sp. nov.
9. Forewing with irregular yellowish brown transverse stripes or markings (Wang et al. 2008: figs 10, 20–21)............................................................................................ D. striata Wang & Liu, 2008
- Forewing without above markings....................................................................... 10
10. Lateral margins of frons with 5 narrow dark brown stripes; costal margin of forewing red, apical region with 3 red triangular marks (Wang et al. 2008: figs 1, 2, 18)......................................... D. trimaculata Wang & Peng, 2008
- Lateral margins of frons without dark brown stripes; forewing without above marks............................... 11
11. Forewing with apex of clavus sanguineous with a large bluish-black spot, base of first apical cell sanguineous........................................................................................... D. majella (Kirkaldy, 1906)
- Forewing not as above................................................................................ 12
12. Anal tube in dorsal view longer than widest part, apical margin rounded (Long et al. 2013: fig. 8)......................................................................................... D. ellipsoidea Long, Yang & Chen, 2013
- Anal tube in dorsal view shorter than widest part, apical margin slightly incised in middle........................... 13
13. Medioventral processes of pygofer narrow in the middle, thence diverging apically (Dlabola 1961: fig. 32)............................................................................................. D. incompta Dlabola, 1961
- Medioventral processes of pygofer not as above............................................................ 14
14. Clypeus and mesonotum dark brown; each medioventral processes of pygofer as right angled triangles; gonostyli with 1 process on outer margin................................................................ D. albomaculata (Muir, 1922)
- Clypeus with apical half brown to fuscous or totally yellowish white; mesonotum yellowish brown, with irregular brown to fuscous markings; each medioventral processes of pygofer not as above; gonostyli with 2 processes................... 15
15. Phallobase in ventral view with 2 large forked processes arising from near middle of lateral margin, lateral margins without dentate process (Chen & He 2010: fig. 21)............................................ D. qiana Chen & He, 2010
- Phallobase in ventral view without 2 large forked processes arising from near middle of lateral margin, lateral margins with dentate process...................................................................................... 16
16. Medioventral processes of pygofer constricted slightly in the middle; phallobase with 1 angular process on the left side (figs 24, 25).................................................................................. D. interana sp. nov.
- Medioventral processes of pygofer constricted abruptly at end; phallobase without angular process on the left side (Long et al. 2013: figs 26, 29)............................................................ D. lua Long, Yang & Chen, 2013