Xylophanes isaon
Antenna with rows of prolonged cilia. Thorax with a grey median line, widening posteriorly, and continued onto the abdomen as two widely separated, not very distinct bands, each bordered dorsally by a series of sometimes interconnected dots and with a distinct brown medial line. Tegula olive green with a golden-yellow medial line. Outer spur of midtibia equal to the inner. Forewing upperside reminiscent of Cechenena minor; ground colour buff with olive green bands and lines; first to third postmedial lines distinct but disappearing distal to Rs4 and basal to 1A+2A, first postmedial heavier than the other two; fourth postmedial line strongest, running almost straight from the inner margin to the apex; fifth postmedial line diffuse, running parallel to fourth. Hindwing upperside basally black; medial band broad, pinkish-orange, basal and distal edges even.
Male genitalia: Uncus truncate-sinuate. Gnathos very slender, narrower than uncus; obtusely pointed. Harpe very slender, subcylindrical, upcurved apically, apex compressed and somewhat dentate. Phallus with an apical process comprising a left and right lobe, the left longer than the right and each ending in a dentate ridge or lobe.