n.solitary wasp that digs nests in the soil and stocks them with paralyzed insects for the larvae
英汉双解大词典
digger wasp
1.
N（名词）
any solitary wasp of the families Sphecidae and Pamphilidae that digs nest holes in the ground, rotten wood, or a hollow stem and stocks them with live insects for the larvae 掘土蜂