中文摘要：

云南扁萤幼虫能够捕食蜗牛和蛞蝓等,其成虫主要以露水汁液为食,但造成其幼虫和成虫捕食机制差异的原因仍不明确.该文利用超景深三维显微镜对云南扁萤Lampyrigera yunnana（Fairmaire,1897）幼虫与雌成虫头部形态进行观察比较,重点比较幼虫与雌成虫口器差异.结果表明：云南扁萤雌成虫头部外观形态与幼虫极其相似,如雌成虫复眼不发达,与幼虫侧单眼相似.但幼虫与雌成虫口器特征存在差异,幼虫上颚外侧具长条形凹槽,上颚1/3处内侧有一齿状突起;而雌成虫上颚外侧无凹槽,内侧也无齿状突起.从口器基本构造来看,扁萤雌成虫不取食的主要原因可能是雌成虫上颚外部的凹槽消失.

英文摘要：

T he larva of Lam pyrigera yunnana （Fairmaire 1897） can hunt snails and slugs, and the adultsfeed m ainly on dew juice. T he difference betw een the feed m echanism of larvae and adults rem ains unclear.T he head structures of larva and fem ale adult has been observed by 3D Super D epth D igital M icroscope, ofw hich the differences of their m outhparts are the m ain part. T he results show th at fem ale ad u lts’ headm orphology sim ilar to the larva is extrem ely, fem ale ad u lts’ com pound eyes are undeveloped and sim ilar tothe lateral ocelli of larvae. But the m o u th parts’ characteristic of the larva and the adult fem ale has differences： the larvae have an elongated groove on the lateral of m outhparts and a denticulation at the 1/3 innerside of m andible. T he laterals of fem ale ad u lts’ m andibles have no groove, and the inner sides also have nodenticulation. From the m outhparts of basic stru c tu re , we hypothesise that fem ale ad u lts’ m andibles haveno groove is the m ain reason of fem ale ad u lts’ non-feeding.