Key to species of the genus Catonidia Uhler, 1896

1. Anterior margin of vertex angular or undulate ................................................................................. 2

– Anterior margin of vertex rounded ................................................................................................... 8

2. Forewing milk-white ........................................................................................................................ 3

– Forewing yellowish brown ............................................................................................................... 5

3. Clavus of forewing with only a few small markings; mesonotum pale yellowish brown (Chen & He 2009: fig. 13) .................................................................................................. C. lii Chen & He, 2009

– Clavus of forewing with large brown markings; mesonotum brown ............................................... 4

4. Clavus of forewing with a fuscous marking near apex; posterior margin of pronotum yellowish (Wang et al. 1991: fig. 3a, c) ...................................................... C. emeiensis Wang & Huang, 1991

– Clavus apex ½ to costal margin with a broad brown marking (Figs 13, 17); posterior margin of pronotum brown (Figs 13, 15) .............................................................................. C. saccata sp. nov.

5. Anterior margin of vertex undulate (Figs 36, 38); pronotum brown, posterior margin milk-white (Figs 36, 38) ........................................................................................................ C. uncinata sp. nov.

– Anterior margin of vertex angular; color of pronotum uniform ....................................................... 6

6. Mesonotum with central area fuscous; anterior margin of forewing with eight arcuate dark markings (Wang et al. 1990: fig. 2a–b) ................................................... C. fujianensis Wang & Huang, 1990

– Color of mesonotum not as above; forewing without above markings ............................................ 7

7. Mesonotum light yellowish brown at the top ⅓, ⅔ yellowish brown (Figs 24, 26); veins of forewing yellowish brown (Figs 24–25) ............................................................................ C. trilobata sp. nov.

– Mesonotum pale fulvous; veins of forewing pale .......................................... C. sobrina Uhler, 1896

8. Forewing without markings (Wang et al. 1991: fig. 2c) ........ C. guadunensis Wang & Huang, 1991

– Forewing with markings ................................................................................................................... 9

9. Costal area of forewing with two fuscous markings near apical angle (Wang et al. 1991: fig. 1c) ... ..................................................................................................... C. tibetensis Wang & Huang, 1991

– Costal area of forewing without above markings ........................................................................... 10

10. Medioventral process of pygofer concave at apex in ventral view ..................................................11

– Medioventral process of pygofer convex at apex in ventral view .................................................. 12

11. Forewing with a sinuate, broad, brown stripe from hind margin to apical angle; medioventral process relatively slender in ventral view (Chen & He 2009: figs 3, 6) .......................................................... .............................................................................................. C. wuyishanana Wang & Huang, 1990

– Forewing without above markings; medioventral process stout in ventral view (Chen et al. 1989: fig. 2d, g) ........................................................................ C. constricta (Chen, Yang & Wilson, 1989)

12. Medioventral process of pygofer in ventral view triangular, lateral margins straight (Fig. 8) ........... ............................................................................................................................ C. triangula sp. nov.

– Medioventral process of pygofer nearly rounded, lateral margins curved ..................................... 13

13. Posterior margin of pygofer with one broad process; dorsal lobe of phallobase stout and tooth-like (Long & Chen 2012: figs 7, 11) ........................................................... C. choui Long & Chen, 2012

– Posterior margin of pygofer with two small processes; dorsal lobe of phallobase vestigial (Chen & He 2009: figs 26, 30) .................................................................. C. daozhenensis Chen & He, 2009