Pyrocoelia lunata

弦月窗螢 Lunate Window Firefly

形態特徵:雄螢體長17-22毫米,本港體型最大的螢火蟲,背板前方窗口清晰、弦月形,發光器橫型,位於第六、七腹板。雌螢體長32-47亳米,黃褐色,有一對短小鞘翅,形狀不穩定,第六、七腹板各有一對點狀發光器。幼蟲黑色,最大紀錄體長65毫米,散佈不規則淺褐色小點,一對發光器位於第八腹節兩側,最後兩節背兩側接近平直,有別於寬緣窗螢幼蟲最後兩節背板兩側弧圓。


分佈地點:多於10個低地及高地天然林區、以及高地草地均有紀錄。


成蟲活躍月份:10月下旬至12月上旬


其他資料:雄螢在空中慢飛、發持續的光;晚間活動時間較遲開始,日落後一小時才陸續現身,至日落後四小時左右。雌螢極罕見幼蟲取食蝸牛。香港特有種。



Morphological featuresMale body length 17-22 mm, the largest firefly in Hong Kong; windows at the posterior part of the pronotum distinct, lunate; light organs transverse, located at 6th and 7th ventrite. Female body length 32-47 mm, bearing a pair of short and small elytra, shape varies, light organs rounded, one pair at 6th abdominal ventrite, another pair at 7th. Larva black, body length of the largest record 65mm; irregularly scattered with small light brown spots, a pair of light organs located at 8th abdominal segment. Lateral sides of the last 2 tergites almost straight, different from the rounded lateral sides of the last 2 tergites in Pyrocoelia analis.


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


Adult flight periodLate October to early December


Other informationMale flies slowly, showing continuous glow, appears late, about 1 hour after sunset, keeps active for about 3 more hours. Female is very rarely recorded. Larva feeds on snails. Endemic to Hong Kong.



Male
20111122-18375289


Female
20120119-23595511


幼蟲 Larva
20100629-201728


Male
20111118-18554212


Male
20061030_21-27-51


Male
20111121-23314200


Male
20101025-194422


雄蛹 Male pupa
20111208-23382661


雌 Female (右 right) 雄 Male (左 left)
20101220-23043443


Female
20101212-20461100


Female
20120119-23572352


Female
20101214-00160813


雌蛹 Female pupa
20120102-23055133


幼蟲 Larva
20110321-20363205


幼蟲 Larva
20120422-21110524


幼蟲 Larva
20110920-20234724


幼蟲捕食蝸牛 Larva predating a snail
20101119-22025022


幼蟲未節 Terminal segments of a larva
20110925-14443058