Eptesicus is a genus of bats, commonly called house bats or serotine bats, in the family Vespertilionidae.

[1] The genus name is likely derived from the Greek words ptetikos 'able to fly' or petomai 'house flier', although this is not certain.

[2] The following species have traditionally been placed in Eptesicus[3] A 2023 study noted divisions within Eptesicus when considering physical characteristics, genetics, echolocation characteristics, and divergence timing, with the authors concluding that Eptesicus should be split into three genera.

They described a new genus, Neoeptesicus, and elevated the subgenus Cnephaeus to genus rank.

[5] The Old World Eptesicus species were moved to Cnephaeus: The Neotropical species were placed in Neoptesicus: These revisions left only two species in Eptesicus: This Vespertilionidae article is a stub.