Male body length 8.5 - 9.5 mm; pronotum black, posterior angles with light yellow marks. Elytra dark brown, basal region and entire margin light yellow. Male lacks light organ. Larva with each tergal plate bearing a large, transverse dark brown marking occupying most of the surface, leaving a thin pale median line and the margins. The marking becomes smaller and paler towards the posterior end. Female body length 13-16 mm, wingless, larviform, very similar to larva except with paler and less prominent brown marking on the tergal plates. At night, posterior end of abdomen curls up to show its very large light organ, emitting continuous light.
Distribution
：
Tai Po Kau, Kam Tin, Tin Shui Wai, Ma Shi Po, Fu Tei Au, Ma On Shan, Lam Tsuen, Wu Kau Tang, Diamond Hill, Tai Tong, Mount Parker Road, Mui Wo
Adult flight period
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Late March to June
Other information
：
After oviposition, female shows 33 light spots and surrounds the eggs. It is much more commonly encountered in villages and farmlands, even in urban parks, than in wild places. Larvae predate on millipedes.
