10. Genus Rehnidium Grant, 1956

Rehnidium, as the most part of batrachideines, is a genus with wide distribution in South America (Fig. 39) but poorly understood and few specimens known beyond the type’s species. After review of the Scaria (Cadena-Castañeda et al., 2019), the genus Rehnidium currently has four species: Rehnidium mendosum Grant, 1956 (from Peru, Monson Valley, Tingo Maria) (Fig. 28); Rehnidium necopinum Grant, 1956 (from Peru, Departamento del Cusco, Marcapata) (Figs. 29, 30); Rehnidium omnivagum Grant, 1956 (from Brazil, Mato Grosso, Santa Rosa de Descalvados) (Figs. 31, 32) and Rehnidium perexiguum Grant, 1956 (Ecuador, Tungurahua, Baños) (Fig. 33) (Grant, 1956, 1962; Cigliano et al., 2021). Rehnidium is characterized by follow: protrusive frontal costa; antennae with 21 segments; wings reduced, apparently absent; anterior margin of the pronotum (lateral and dorsal view) hook-like (median carina sharply cristate); presence of lateral darkish perpendicular band from eyes to disc pronotal region and only brachpronotal specimens (Grant, 1956, 1962).