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.
老熟幼虫一般在被害叶片背面或枯叶、叶柄、叶脉及杂草上吐丝做薄茧化蛹，蛹期5 - 15天。
Mature larvae usually leaves the victim or the back of the leaves, petioles, veins and weeds on a thin silk cocoon so pupation, pupal stage 5-15 days.
幼虫叫“豆虫”，老熟的长约90毫米，嫩绿色，头部色较深，尾部有尾角，从腹部第一节起，两侧有七对白色线。
Larvae called "bean insect", the old familiar about 90 mm long, head of peak green, the color is deep, the tail end Angle, from the abdomen is first quarter up, both sides have seven to white line.
幼虫叫“豆虫”，老熟的长约90毫米，嫩绿色，头部色较深，尾部有尾角，从腹部第一节起，两侧有七对白色线。
Larvae called "bean insect", the old familiar about 90 mm long, head of peak green, the color is deep, the tail end Angle, from the abdomen is first quarter up, both sides have seven to white line.
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