Oeme costata LeConte, 1873

Median lobe (Figure 88C 3–D3) substraight in lateral view; ventral lobe longer than dorsal lobe; ventral and dorsal lobes with acuminate apex; basal apophysis longer than length of apical portion, basal region widened. Tegmen (Figure 88A 3–B3) about 0.89 length of median lobe, distal half curved in lateral view; distal region completely divided into parameres; parameres about 0.48 length of tegmen, subparallel, with short and dense setae on apex; ring piece subtriangular, about 0.43 total length of tegmen, basal inner margin angular, ′V̍-shaped; apical margin very narrowed and rounded.