[目的]研究二纹蕈甲(Dacne picta Crotlh)蛹体的变化和羽化行为。[方法]对室内饲养的二纹蕈甲进行观察并记录。[结果]二纹蕈甲羽化前,蛹的复眼、上颚、跗节和翅的颜色逐渐加深。化蛹后第14～16d为羽化高峰期,雌雄性比接近1:0.77。羽化时,蛹壳由前胸背板处裂开,后翅在收缩折叠前,有伸展的现象。[结论]该研究摸清了二纹蕈甲蛹体的变化和羽化行为。 [Objective] The research aimed to study the change and emergence behavior of pupae in Dacne picta Crotlh. [Method] The indoor two kinds of mushrooms were observed and recorded. [Result] The color of compound eyes, palate, knuckles and wings of pupae gradually deepened before the emergence of two molds. After pupae 14th to 16th days was the peak of eclosion, the ratio of male to female was close to 1: 0.77. When eclosion, pupa shell from the chest and back at the crack, hind wings in the contraction before folding, stretching phenomenon. [Conclusion] The study identified the change and eclosion behavior of the bifidobacteria of two species.