上图：壁蜂老熟幼虫下唇内表面的平行纹

Above: Salivary lips showing parallel ridges of inner surface of lower lip, last larval instar of Osmia chalybea.

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上图：壁蜂老熟幼虫下唇内表面的平行纹

Above: Salivary lips showing parallel ridges of inner surface of lower lip, last larval instar of Osmia chalybea.

youdao