Key to species of Compsodactylus

1. Body not dorsoventrally flattened; posterior area of clypeus with denticle-like setae; elytral striae strongly punctate....... 2

1’ Body dorsoventraly flattened; posterior area of clypeus without denticle-like setae; elytral striae shallowly and irregularly punctate. Bolivia (Cochabamba)............................................................ C. parvulus (Frey)

2(1) Pronotum and elytra with green reflections, length 7–8 mm; male metafemur greatly enlarged (Figs. 2, 35). Peru (Apurímac)...................................................................................... C. martinezi (Frey)

2’ Body without green reflections, length about 6 mm; male metafemur slightly enlarged (Fig. 8). Argentina (Salta, Tucumán).................................................................................... C. scabrosus Fuhrmann