R. S.  Bagnall, ?Records of some Siphonaptera (Fleas) from Lancashire.?, Lancashire & Cheshire Naturalist 11: 263-264., 1919.

R. S.  Bagnall, ?The Siphonaptera (Fleas) of Northumberland and Durham.?, Transactions of the Natural History Society of Northumberland, Durham and Newcastle-Upon-Tyne 5(2): 181-198., 1919.