Key to species of Eucharitolus adapted from Botero & Monné (2012)

1. Pronotum without dense and coarse punctate throughout. Peru .................... E. lecossoisi Audureau & Demez, 2015

- Pronotum with dense and coarse punctate throughout......................................................... 2

2(1). Scape surpassing posterior margin of prothorax; punctures on the posterior area of the pronotum not following toward the sides of the prothorax. (Fig. 18). Peru, Bolivia ......................................... E. longus Botero & Monné, 2012

- Scape not surpassing posterior margin of prothorax; punctures on the posterior area of the pronotum following toward the sides of the prothorax. (Fig. 15).............................................................................. 3

3(2). Prosternal process at least half as wide as procoxal cavity..................................................... 4

- Prosternal process less than half as width as procoxal cavity................................................... 5

4(3). Anterior region of pronotum with transverse depression; protibiae with a small ventral tooth on the basal third (reduced in females). (See photographs on Bezark 2024 and in the original description). Brazil (Espírito Santo)............................................................................................ E. depressus Botero & Monné, 2012

- Anterior region of pronotum without transverse depression; protibiae without small tooth. (Figs 10–13). Brazil (Minas Gerais, Rio de Janeiro, São Paulo, Santa Catarina, Rio Grande do Sul)............................. E. lituratus (Melzer, 1934)

5(3). Elytra with longitudinal, not fragmented dark pubescent band from base to after middle. Peru, Bolivia, French Guiana, Brazil (Amazonas, Rondônia, Mato Grosso).............................................. E. dorcadioides (White, 1855)

- Elytra without longitudinal dark pubescent band from base to after middle or with fragmented dark pubescent band....... 6

6(5). Elytra without large and irregular dark macula centrally, surrounded by dense yellowish or whitish pubescence. (Figs 14–17). Bolivia, Brazil (Rondônia, Espírito Santo, São Paulo, Paraná)....................... E. spilotus Botero & Monné, 2012

- Elytra with large and irregular dark macula centrally, surrounded by dense yellowish or whitish pubescence............. 7

7(6). Dark central area on elytra almost reaching suture. (See photographs on Bezark 2024 and in Botero & Monne 2012). Guatemala, Costa Rica, Panama, Bolivia, French Guiana ............................................... E. pulcher Bates, 1885

- Dark central area on elytra away from the suture............................................................. 8

8(7). Distance between upper eye lobes about three times the width of one upper lobe. Pro- and mesofemoral clubs (Figs 30–31) distinctly wide in males: maximum profemoral diameter about 0.4 times femoral length; maximum mesofemoral diameter about 0.3 times femoral length. (Figs 24–31). Brazil (São Paulo).................................. E. thomazi sp. nov.

- Distance between upper eye lobes about twice the width of one upper lobe. Pro- and mesofemoral clubs (Figs 3–4) narrower in males: maximum profemoral diameter about 0.3 times femoral length; maximum mesofemoral diameter about 0.25 times femoral length. (Figs 1–6). Brazil (Rio de Janeiro, São Paulo, Santa Catarina)................... E. bellus (Melzer, 1927)