以老熟幼虫在土中结茧越冬。
Its mature larva makes cocoon under the earth during the winter.
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.
老熟幼虫长27 - 38毫米，头褐色，背面黑色并有彩色纵纹。
Old familiar larvae 27-38 mm long, brown, black head on the back and have a color vertical lines.
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