大斑芫菁 mylabris phalerata

這不是蜂,而是甲蟲一種,名叫大斑芫菁。 芫菁頭部和胸部之間明顯收窄,腹部肥大,翅鞘有別其他甲蟲,又薄又軟;又名斑蝥,會分泌出一種刺激性物質,稱「斑蝥素」。牠們對人是益蟲也是害蟲,幼蟲食蝗卵,但數量一多,一起咬食植物葉片,禍如蝗害。

大斑芫菁翅鞘有鲜明的黄黑斑纹。這大斑芫菁在南丫島香草原,啃食蒲公英的花片。

it is not a wasp but a kind of blister beetle. this little fellow’s latin name is mylabris phalerata. it has sharp yellow and black stripe. it has a defensive secretion called cantharidan. according to wikipedia, cantharidin is a poisonous chemical that causes blistering of the skin. cantharidin is used medically to remove warts and is collected for this purpose from species of the genera mylabris and lytta, especially lytta vesicatoria, better known as “spanish fly”. This photo was taken at herboland at lamma island, it was busy consuming a dandelion flower.

芫菁 ~ blister beetle

·鞘翅目·芫青科 ~ order: coleoptera (beetle) | family: meloidae

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