Calosoma argentinense, the Argentine caterpillar hunter, is a species in the beetle family Carabidae. It is found in South America. This species is found in Bolivia, Argentina, Paraguay, Uruguay and Brazil, where it inhabits Chaco forests, dry valleys in the pampas and desert scrub and grassy areas.
Adults are nocturnal and prey on insect larvae, such as the caterpillars Colias lesbia.