Key to species of Sulcolotis from Philippines

1 Elytra entirely or in basal half black...................................................................... 2

- Elytra with only median oval spot black·................................................................... 3

2 Elytra entirely black............................................ Sulcolotis xanthomarginalis Liu & Wang sp. nov.

- Elytra black in basal half and yellow in apical half............................... Sulcolotis seminigra Miyatake, 1994

3 Head, pronotum and elytra reddish brown, penis guide shorter than parameres........ Sulcolotis ovalis Liu & Wang sp. nov.

- Head, pronotum and elytra yellow, penis guide sub equal in length to parameres.... Sulcolotis threadis Liu & Wang sp. nov.