"Mosia" redirects here. For the homonymous wasp genus established by Seyrig in 1952 but not yet renamed, see Mosia (wasp).The dark sheath-tailed bat (Mosia nigrescens) is a species of sac-winged bat in the family Emballonuridae. It is the only species in the genus Mosia.It is found in Indonesia, Papua New Guinea, and Solomon Islands.