Key to the species of Scythropiodes in China
1 Forewing ground color yellowish brown or brown.......................................................... 2
- Forewing ground color pale yellow or white or greyish white................................................ 10
2 Forewing with discal or discocellular spot................................................................. 3
- Forewing with neither discal nor discocellular spot.......................................................... 9
3 Valvae asymmetrical; juxta with two short lobes posteriorly (Fig. 32)........................ S. asymmetricus sp. nov.
- Valvae symmetrical.................................................................................. 4
4 Phallus torch-shaped (Fig. 33)............................................................. S. taedus sp. nov.
- Phallus not torch-shaped.............................................................................. 5
5 Valva with a thumbed process in dorsal surface (Fig. 26)................................. S. dorsoprocessus sp. nov.
- Valva without thumbed process in dorsal surface........................................................... 6
6 Transtilla with a pair of thin digitate lateral lobes (Clarke 1955: Pl. 235, Fig. 3 b)........................... S. lividula
- Transtilla with a pair of oval or subtriangular lateral lobes.................................................... 7
7 Transtilla with oval lateral lobes; phallus with a hook-shaped process distally (Fig. 28)...................... S. oncinius
- Transtilla with subtriangular lateral lobes; phallus without process distally....................................... 8
8 Valva with a digitate apical process (Fig. 29)...................................................... S. malivora
- Valva with a thorn-shaped apical process (Fig. 27)................................................. S. elasmatus
9 Valva bifurcated from distal 1/4, juxta inverted triangular; transtilla without lateral lobe (Fig. 25).............. S. gnophus
- Valva not bifurcated distally, juxta trapezoidal; transtilla with lateral lobes (Fig. 24)...................... S. barbellatus
10 Forewing ground color pale yellow; juxta with paired horn-shaped lateral lobes and a median forked process posteriorly (Figs 16, 31).................................................................................... S. triangulus
- Forewing ground color white or greyish white............................................................ 11
11 Forewing without spots in cell; valva with two digitate processes and an oval process distally (Moriuti 1977: Figs 7, 15)................................................................................................ S. venusta
- Forewing with spots in cell........................................................................... 12
12 Phallus without cornutus; valva subquadrate (Fig. 21).............................................. S. hamatellus
- Phallus with one to five cornuti........................................................................ 13
13 Valva without apical process.......................................................................... 14
- Valva with an apical process.......................................................................... 15
14 Phallus with two cornuti, transtilla with subrectangular lateral lobes bearing two spines (Fig. 22)............. S. jiulianae
- Phallus with four to five cornuti, transtilla with semioval lateral lobes bearing no spines (Fig. 30)................ S. issikii
15 Phallus with three cornuti............................................................................. 16
- Phallus with one cornutus............................................................................ 17
16 Valva gradually narrowed from distal 1/3, with a short apical spine (Fig. 20).............................. S. tribula
- Valva suddenly produced from distal 1/3 to a finger-like apical process (Fig. 19)...................... S. approximans
17 Cornutus curved (Clarke 1955: Pl. 235, Fig. 2 b)................................................... S. leucostola
- Cornutus straight................................................................................... 18
18 Valva with a spine-like apical process (Fig. 23)........................................... S. aculeiformus sp. nov.
- Valva with a digitate apical process (Clarke 1955: Pl. 240, Fig. 3 b).................................... S. velipotens