Key to Espírito Santo species of Sinervus

1 Pronotum predominantly shiny black; scutellum uniformly black............................................... 2

- Pronotum predominantly yellowish, except for the collar and two small spots at the base of the disc, black; scutellum dark brown with a vertical whitish line from apex to mesoscutum....................................... S. venturai n.sp.

2 Head and pronotum uniformly fuscous to black, hemelytra with two transverse stripes reaching the embolium .................................................................................................... S. baerensprungi

- Head and pronotum not uniformly fuscous to black, hemelytra without transverse stripe reaching the embolium; pronotum with a black colar and calli yellowish......................................................................... 3

3 Disc of pronotum uniformly black; hemelytra transverse dark stripe small, not reaching the embolium; innermost part of the cuneus base and borders, visibly black.................................................... S. vendanovensis n.sp.

- Disc of pronotum not uniformly black with humeral tubercles and lateral narrow side stripes, yellowish; hemelytra with a small fuscous spot on corium near apex of clavus; anterior portion of the cuneus free of black spots, and the internal cuneus boundary faintly dark................................................................................ S. hyalipedes