Calosoma frigidum is a species of ground beetle in the subfamily of Carabinae. It was described by Kirby in 1837.
This species, in the subgenus Calosoma, is characterized by the small, short prothorax which, compared with the elytra, is pronouncedly narrow. Black, often with faint bronze lustre, sides of prothorax and elytral foveae and side margins usually metallic (green, golden or purple); ventral side with green or purple reflection; legs black. Length 17 to 27 mm.
Locality: Native, New World. Canada- AB, BC, MB, NB, NS, ON, PE, PQ, SK; USA- CO, CT, GA, IA, IL, IN, LA, MA, MD, ME, MI, MN, NC, ND, NE, NH, NJ, NV, NY, OH, PA, RI, TX, UT, VA, VT, WI, WV.
Common Name: Cold-country Caterpiller Hunter
Synonyms: Calosoma frigidum Kirby, 1837; Calosoma frigida levettei Casey, 1897
This species may occur in all kinds of habitats, but apparently prefers open woodland.