Male body length 5 mm; compound eyes very large, with a prominent indentation. General appearance resembles Rhagophthalmus, but the filiform antennae are 11-segmented, elytra are shorter and boarder. Female wingless, ground colour pale yellow, with flecked reddish brown markings on all thoracic tergites and 1-4th abdominal tergites. A pair of light organs located at the lateral side of 7th abdominal segment.
：Tei Tong Tsai
Adult flight period
：Female does not raise its abdomen as
Rhagophthalmus when displaying light. Female fluoresce in bluish green from body under ultraviolet illumination. A pair of very dim light spots can be observed from the male's abdomen in darkness.