noun
potter wasp; mason wasp
Refers to any wasp of the subfamily Eumeninae, known for building mud nests.
軒下にドロバチが巣を作っていた。
A potter wasp had built a nest under the eaves.
Compound of 泥 (doro, 'mud') + 蜂 (hachi, 'bee/wasp'), referring to the mud nests built by these wasps. The reading どろばち is a straightforward combination of the two elements.