Male body length 10mm, elytra slender, compound eyes very large, with a prominent indentation. Light organ absent in adult male. Female body length 9-13 mm, wingless, larviform, no conspicuous colour mark. At night, posterior end of abdomen curls up to show its very large light organ, emitting continuous light.
Distribution
：
Tai Mo Shan, Mui Tsz Lam (Shatin)
Adult flight period
：
Late December to early March
Other information
：
After oviposition, female shows 33 light spots and surrounds the eggs. In cold winter when air temperature drops to 12
o
C, female still shows its light in the wild. Larvae predate on millipedes.
Endemic to Hong Kong.
雌 Female (左left) 雄 Male (右 right)
雄 Male 雌 Female 雌 Female 雌 Female 雌 Female 幼蟲獵食馬陸 Larvae predating on a millipede
