Male body length 12-18 mm, windows at the posterior part of the pronotum small; elytra with orange rim, outer margin broader; light organs transverse, located at 6th and 7th ventrite. Female body length 28 mm, orange in colour, bearing a pair of short and small elytra, light organs rounded, one pair at 6th abdominal ventrite, another pair at 7th. Larva black, irregularly scattered with small light brown spots, a pair of light organs located at 8th abdominal segment. Lateral sides of the last 2 tergites rounded, different from the more straight lateral sides of the last 2 tergites in Pyrocoelia lunata.
Distribution
：
Commonly seen in countryside, farmlands, abandoned farmlands, fish ponds, wetlands, occasionally even in the city, but less commonly seen in woodland areas.
Adult flight period
：
March to December
Other information
：
Male
is commonly seen, but not in large number, usually in one to a few individuals, flying slowly, showing continuous glow, activity duration long, could be seen till midnight. Female is very rarely recorded. Larva feeds on snails.
雄 Male 雌 Female 幼蟲 Larva 雄 Male 雄 Male 雄 Male 螢光軌跡 Light track 雌 Female 雌 Female 雌蛹 Female pupa 成熟幼蟲 Mature larva 年幼幼蟲 Young larva 幼蟲捕食蝸牛 Larva predating a snail 幼蟲末節 Terminal segments of a larva
