We describe and illustrate a new bat chigger, Whartonia (Fascutonia) natsumei Takahashi, Takahashi & Kikuchi n. sp., ex. Plecotus auritus (Linnaeus, 1758), from Japan, and summarize the host and distribution records of the chiggers of the genus Whartonia Ewing, 1944. With the description of a new species here, the number of Whartonia species increases to 40 composed of 22 species from Asia, 14 from North and South America in addition to Central America, and four from Africa.