Published online by Cambridge University Press: 31 May 2012
The genera Nearctopsylla Rothschild 1915, Corypsylla Fox 1908, and Corypsylloides Hubbard 1940, all apparently strictly Nearctic, comprise a natural group which is intimately associated with certain mammals of the Order Insectivora. A subfamily, Nearctopsyllinae, of the Hystrichopsyllidae, has recently been proposed (Holland, 1949: 102) to accommodate these three genera, which are well separated from other fleas on the basis of a number of well marked morphological characteristics.