About Chiasmia emersaria (Walker, 1861)
Chiasmia emersaria (Walker, 1861) has a wingspan of approximately 32 mm in males, and 40 mm in females. The outer margin of the forewing is prominently angled at vein 4. The hind tibia of the male is dilated. The body is grey, irrorated (sprinkled) with pale and dark brown. Dark spots appear on the dorsal surface of the abdomen. The forewings have a dark subbasal speck. Indistinct oblique antemedial, medial, and postmedial lines are angled below the costa, and originate from rufous patches or short bands on the costa. A dark speck is located at the end of the cell. Beyond the postmedial line, there is a costal rufous patch, and a disintegrated dark patch at vein 4. The outer area of the forewing is slightly darker, and the margin is rufous below the apex. The hindwing has an indistinct antemedial line, and a dark spot at the end of the cell. It bears a dark waved postmedial line, with rufous and grey suffusion beyond the line. A dark marginal line is present on the hindwing. In both wings, the veins of the pale outer area are pale. On the ventral side, there is a broad rufous postmedial band with a crenulate outer edge.
