Diagnosis. Schinia immaculata resembles S. biundulata Smith in size, forewing ground
color, and dark hindwing, but S. biundulata has well defined antemedial and postmedial
lines, which are absent in S. immaculata. In male genitalia the shape of the valve is different,
with S. immaculata having a round apex (Fig. 3) versus a more pointed apex (Fig. 5)
in S. biundulata; and the uncus is relatively longer, approximately 0.38 X length of the
valve in S. immaculata, compared to 0.32 X length of valve in S. biundulata.