Siphonaptera of North America north of Mexico: Ischnopsyllidae

The four genera and 11 species of bat fleas known to occur in North America north of Mexico are reviewed with respect to their distribution and host preferences. All are found on hosts belonging to the bat family Vespertilionidae except Sternopsylla distincta (Rothschild, 1903) and Hormopsylla trux Jordan, 1950, which parasitize species of Molossidae. Keys are provided for the genera and species and their diagnostic characters are illustrated.