Methods:To collect living Citellus dauricus with nest, placed in the fuming-mouse tank, rats and fleas were fumed to the death in ther or petrol without exception, and then collected the fleas.

• 方法:收集活体达乌尔黄鼠及其窝巢,置熏鼠桶用乙醚、汽油将鼠蚤一并熏死,捡蚤;鼠洞用法兰绒探蚤棒每洞探3次,收集洞干游离蚤。