Calosoma obsoletum

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Calosoma obsoletum, the old beautiful black searcher, is a ground beetle in the Carabidae family. It was first described by Say in 1823.

Where it lives:
- Range: Alberta, Manitoba, Saskatchewan, Colorado, Iowa, Idaho, Kansas, Minnesota, Montana, North Dakota, Nebraska, New Mexico, Nevada, Oregon, South Dakota, Utah, and Wyoming
- Habitat: open prairies, rangelands, and cultivated fields

What it does:
- Diet: Both adults and larvae prey on caterpillars, including Hemileuca oliviae

Taxonomy notes:
- Genus: Calosoma; Species: obsoletum
- Synonyms: Calosoma indistinctum, Calosoma microstictum