Eumops delticus is a species of free-tailed bat found in South America.

[2] The holotype had been collected by Wilhelm Ehrhardt (1860–1936), a Guyana-born German animal collector.

[3] In 1932, Colin Campbell Sanborn published that E. delticus should be considered a subspecies of the dwarf bonneted bat (E.

[5] E. delticus is found in the following South American countries: Brazil, Colombia, and Peru.

It meets the criteria for this classification because of ongoing uncertainty of its geographic range and ecological requirements.