Abstract
Genera Stenichnus and Scydmoraphes are distributed in the Northern Hemisphere, with a few rather peculiar species described from South America. Type series of Stenichnus andicola Franz, Scydmoraphes venezolanus Franz and Scydmoraphes peruanus Franz were examined and the first of these species is transferred to Sciacharis Broun, while two new generic names are established to accommodate the two latter species: Meridaphes gen. n. and Perumicrus gen. n. This results in three new combinations: Sciacharis (incertae sedis) andicola (Franz) comb. n., Meridaphes venezolanus (Franz) comb. n., and Perumicrus peruanus (Franz) comb. n. Morphological structures of all treated taxa are described and illustrated in detail.