Diaphanes citrinus

橙螢 Orange Window Firefly

Morphological features：Male body length 12-15 mm; antennae filiform, short; distal half of pronotum transparent, form two large windows; light organ transverse, located at the 6th and 7th ventrite. Female body length 20-26 mm, completely wingless or bearing a pair of small elytral rudiments, antennae filiform, distinguised from the serrate antennae of Diaphanes lampyroides; light organs transverse, located at ventrite 6 and 7. Larva dark brown, irregularly scattered with numerous small light brown spots.

Distribution：More than 10 locations of lowland and highland natural woodlands as well as highland grasslands have records.

Adult flight period：Late October to late November

Other information：Males become active 30 minutes after sunset, often occur in large number, flying slowly and showing continuous glow. 30 minutes later, quantity drops and almost all disappear after further 15 minutes. Female is seldom encountered, found on rocks or branches in open areas, bending its abdomen upward, showing the light.

 

形态特征：

雄萤：体长约12-15毫米，触角丝状，短小，前胸背板前半部透明，形成两页大窗；发光器横形，位于第六、七腹板。

雌萤：体长20-26毫米，完全无翅或具十分短小的翅芽，触角丝状，有别于锯角雪萤的锯齿状，发光器横形，位于第六、七腹板。

幼虫：黑褐色，不规则地散满大量黄褐色小点，一对发光器位于第八腹节。

分布地点：在多个低地及高地的天然林区、以及高地草地均有记录。

成虫活跃月份：10月下旬至11月下旬。

其他资料：

– 雄萤在日落后半小时开始活跃，常大量涌现，在空中慢飞并发出持续的萤光，约30分钟后开始减弱，45分钟后基本上完全消失。

– 雌萤甚少见，在空旷地方爬上石块或树枝，腹面向上展露萤光。