Key to the Scybalocanthon species from South America south Amazon basin

1. Legs with yellow and black coloration along its length........................................................2

- Legs completely dark brown or black.................................. S. zischkai (BOLIVIA, Cochabamba; Fig. 3).

2. Elytral surface with yellow and black coloration.............................................................3

- Elytra completely dark brown or black...................... S. korasakiae (BRAZIL, Minas Gerais, São Paulo; Fig. 3).

3. Elytra with yellow horizontal band on its central portion occupying approximately one-third of elytral length (Fig. 1); metepis- ternae dark brown or black (Fig. 2); anterior and posterior margins of pronotum with triangular black spot on the middle por- tion (Fig. 1)........................................................ S. batesi sp. nov. (BRAZIL, Bahia; Fig. 3).

- Most of elytral surface yellow, black coloration restrict to elytral edge; metepisternae and pronotum yellow......................................... S. nigriceps (BRAZIL: Paraná, Rio de Janeiro and São Paulo; PARAGUAY: Caazapa; Fig. 3).