Male: A C. curvapeligrosa, frontal view, F1 shorter than wide, clypeus extending for more than half its length below LOT (white portion of bracket) B C. curvapeligrosa, malar space subequal to clypeal lateral C C. mayu, frontal view, F1 ~1.1× as long as wide, clypeus extending for less than half its length below LOT (white portion of bracket) D C. mayu, malar space ~0.8× as long as clypeal lateral; scale bars 0.25 mm.