In this paper we describe a new species, Euspilotus (Neosaprinus) kovariki n. sp. (Histeridae, Saprininae), which was captured in bottle traps baited with chicken giblets, some of them located in the vicinity of anthills of Acromyrmex lundii (Guérin-Méneville) and others in absence of anthills. We include images of habitus, genitalia of both sexes, antenna, jaws, chin, maxilla and drawings of the male genitalia and a discussion about the biology of Euspilotus (Neosaprinus) kovariki n. sp. This species was registered at the Monte biogeographic province, in the central part of Argentina. The Monte is a warm desert with bushes that extends between the Puna and Patagonia east of the Andes.