Biological characters Metamorphosis is complete Larvae are either caterpillar-like as in the sawflies or vermiform in the remaining species 心卵多数卵圆形或香蕉形 e一年发生1代，少数一年2代或多代 。许多种类以滞育的老熟幼虫越冬 ®内寄生性的寄生蜂以幼龄幼虫在未老熟的幼虫体内越冬 。社会性蜂类以成虫在树皮下或草丛中越冬Biological characters Metamorphosis is complete Larvae are either caterpillar-like as in the sawflies or vermiform in the remaining species. 卵多数卵圆形或香蕉形 一年发生1代，少数一年2代或多代 许多种类以滞育的老熟幼虫越冬 内寄生性的寄生蜂以幼龄幼虫在未老熟的幼虫体内越冬 社会性蜂类以成虫在树皮下或草丛中越冬